Telemechanical system for monitoring and controlling cathodic protection units of gas pipelines
FIELD: physics; control.
SUBSTANCE: invention relates to telemechanics and automated systems for measuring, monitoring, adjusting, diagnosing and controlling remote objects, and specifically to systems for corrosion monitoring of electrochemical protection of gas pipelines, particularly cathodic protection units. The telemechanical system for monitoring and controlling cathodic protection units of gas pipelines comprises cathodic protection units, a control station with an automated workstation for a controller and a communication channel between cathodic protection stations and the control station. The communication channel is set up by connecting an overhead power line to high-frequency chokes and coupling capacitors, connected to coupling filters which are provided with grounding blades and are connected to high-frequency communication units, one of which is installed at the control station and is linked to the automated workstation of the controller, and the other are installed in the cathodic protection units and are linked to monitoring and control units; furthermore, each anode grounding connection and each pipeline drainage point is connected to a measuring transducer which is linked to the monitoring and control unit.
EFFECT: high reliability of cathodic protection units of gas pipelines.
The invention relates to the field of robotics and automated systems for measurement, monitoring, control, diagnosis and management of remote objects, and in particular to systems corrosion monitoring cathodic protection of pipelines, in particular cathodic protection.
Installation of cathodic protection (ukz) provide electrochemical protection of pipelines from corrosion and increase the life. The installation of a cathodic protection consist of one or more cathodic protection stations (RMS) (depending on the number of threads pipelines), deep anode ground wires, sensors for measuring the protective potential of pipelines and speed sensors corrosion. The output signals of the latter are measured at the measuring points (KIP).
Cathodic protection of metallic pipelines is carried out so that they had a constant value of protective potential provided by the cathodic protection stations (RMS), regardless of changes in the conductive properties of the soil and the currents flowing in it.
One installation of cathodic protection (ukz) provides a limited length of the protective zone of the pipeline. For protection of the pipeline installation are installed with a certain step in its entirety.
To collect information from all of the mouth of the mode of cathodic protection and management of their technical means used various remote automated corrosion monitoring system, in which as communication channels currently in use are the following:
- wired telephone line;
- channel VHF;
- radio relay links;
- mobile cellular communication GSM;
- satellite communication channels;
- fiber-optic communication lines.
More than 70% of the territory of the Russian Federation refers to the cold area, climatic conditions which have a decisive impact on the reliable operation of cathodic protection. Therefore, in recent years special attention is paid to not only the reliability of cathodic protection stations (RMS), but also the continual monitoring of technical means of cathodic protection (ukz) to ensure proper and timely maintenance and repairs, as well as issues telemetry parameters ukz remote adjustment of its work to ensure the effective protection of pipelines.
Known remote-control system and control stations cathodic protection (patent RU 101545 U1 G05B 19/00, publ. 20.01.2011) containing cathodic protection stations, controllers, remote control with integrated GSM GPRS modems, peripheral channels of communication, antenna-feeder device controllers, remote control, GSM GPRS channels of the transmit-receive data, antenna-feeder devices mobile operator, SM GPRS server mobile operator, automated jobs. Its composition also includes a dedicated single server remote control, INTERNET communication channel providing communication between GSM GPRS server of the mobile operator and the server remote control, the communication channels INTRANET/INTERNET, providing communication between the telecontrol server and workstations, complex server software, consisting of routine transmit-receive data and routines for visualization, processing and storage of data. The telecontrol server receives data from the controllers telecontrol stations, cathodic protection, processes and submits it to the workstations directly without intermediate servers reception, switching, and communication. Controllers remote control use the channel GSM GPRS communication and software TCP/IP. Routine data transmit-receive functionally designed in the form of services that run server operating system remote control. Routine imaging, data processing and storage is implemented by means of WEB-programming. Complex server software installed on a single server remote control and implements the functions of the SCADA. The peripheral channels of communication for the transmission of data from the object of control in the controller of the remote control are presented in Aut a line interfaces RS-232, RS-485. Complex server software using hardware and software server remote control and the INTERNET provides an unlimited number of points of regulated access to information on cathodic protection stations based on the classification of the user name (login) and password (password) and thereby implements the functions of information security and delineating the rights of users.
The disadvantages of the known telecontrol system of monitoring and control of cathodic protection stations are as follows:
the system involves the use of communication channels GSM GPRS with complex equipment GSM GPRS involving GSM modems, GPRS and antenna-feeder devices. This equipment and its installation are costly;
- organization of information transmission over the air, which uses this system as a communication channel, in terms of rugged relief is impossible because of the limited range of radio equipment;
- there is no control current value of each anode earthing characterizing the state of his health. The lack of information about the change in time of the anode current of each of earthing is not possible to estimate the rate of dissolution of its electrodes and in a timely manner to carry out the necessary repairs;
- there is no control current at each point of the drains of the MS (the point of connection to the pipeline), characterizing the condition of the insulation of the current-carrying wire and the condition of the contact points node drainage. The absence of control current at the point of drainage reduces the efficiency of the process control cathodic protection of the pipeline.
The closest analogue of the claimed utility model is known subsystem corrosion monitoring (PCM) "scat" (http://forum.sferamk.runwww.forum.sferamk.ru/index.php/ru/pkm-skat; http://www.signalrp.ru/catalog/skat-s/). Subsystem corrosion monitoring (PCM) "scat" is a system of distributed type, includes: automated workplace (AWP) Manager, the installation of a cathodic protection the cathodic protection stations (RMS), equipped with remote monitoring and control points (KIP), joint communication channels.
Rack instrumentation installed remote control (UDC KIP), which provide the measurement and transmission through a communication channel protective and polarization potentials, also the condition of the plates indicators corrosion sensor.
Information exchange signals cathodic protection stations (RMS) with an automated operator workplace (AWP), you can:
- on mobile channels GSM (SMS/CSD/GPRS);
- VHF radio;
- on a local area Ethernet network;
- physical duhp the water line through the RS-485 interface.
Information exchange signals UDC instrumentation workstation Manager can be accessed through the mobile channel GSM (SMS/CSD/GPRS) or physical two-wire line via the RS-485 interface.
Subsystem corrosion monitoring (PCM) "SCLT capturing, storing and displaying on the monitor the operator workstation, the following main parameters of the installation of a cathodic protection (ukz):
- total capacity;
- polarization potential;
- status indicators speed sensor corrosion;
- the output voltage of the cathodic protection stations (RMS);
- output current RMS;
- supply voltage and current consumption installation.
- the state of intrusion detection devices;
- breakage of the electrode;
Cap SCLT" provides the following control functions:
- setting current value VHC;
- setting protective capacity;
installation modes VHC.
The disadvantages of the known subsystem corrosion monitoring (PCM) "SLT" are as follows:
- this system involves the use of wireless (radio channel) communications. When the communication quality is significantly affected by the terrain and weather conditions, which reduces the operational reliability of the system;
- there is no control current value of each anode earthing characterizing the state of his country customization operating capability the spine (wear). The lack of information about the change in time of the anode current of each of earthing is not possible to estimate the rate of dissolution of its electrodes and in a timely manner to carry out the necessary repairs, which reduces the efficiency of the system;
- there is no control current at each point of the drainage (the point of connection to the pipeline), characterizing the condition of the insulation of the current-carrying wire and the condition of the contact points node drainage. The absence of control current at the point of drainage reduces the efficiency of the process control cathodic protection of the pipeline, which also adversely affects its performance or reliability.
The technical task of the invention is the creation of a telecontrol system of monitoring and control of cathodic protection of pipelines, providing case the communication in any terrain and increased functionality of the control parameters for each installation forecasting failures of their components.
The specified technical task proposed to solve with the help of high-frequency communication channel, organized by the connecting equipment control office and cathodic protection to the air lines, and using transducers that are connected to each anode satellites and to each point of the drainage pipeline.
The technical result is increased reliability of operation of the cathodic protection of gas pipelines.
To achieve a technical result in telematic system of monitoring and control of cathodic protection of pipelines, containing the installation of a cathodic protection the cathodic protection stations, with blocks and control, pipelines, anode grounding, control and measuring points, sensor capabilities and speed sensor corrosion control point with workstation Manager, the communication channel between stations cathodic protection and control point, according to the invention, the communication channel is arranged by connecting to overhead power line high-frequency chokes, capacitors communication, United with filters attached, with earthing blades and connected to the blocks a high-frequency communications, one of which is installed in a control room and associated with the workstation Manager and others in the cathodic protection and associated with the control units and control, in addition to each of the anode to ground and to each point of the drainage pipe connected to the transmitter associated with the control unit and the control.
The invention and its principle of work is s illustrated by the schema.
In Fig.1 shows a structural diagram of the telecontrol system of monitoring and control of cathodic protection of gas pipelines; Fig.2 - installation of cathodic protection.
Telemechanics system of monitoring and control of cathodic protection of gas pipelines (Fig.1) contains control point (DP) and the installation of a cathodic protection (ukz) interconnected linear high-frequency channel communication overhead power transmission lines (PTL), consisting of high-frequency chokes (VCS) and capacitors communication (CC) with appropriate filters attach (FC).
Control point (DP) contains the automated workplace (AWP) Manager, United line interface RS-485 with power-frequency (RF) communication, the output of which is connected to the filter connection (FP) linear high-frequency communication path but power lines.
Workstation Manager contains a Central processing unit (computer) installed in it with an appropriate program, which provides automated control of each installation of cathodic protection (UCF), a collection of technological information from all controlled ukz, processing, storage and presentation of this information to the scheduler.
Each installation of cathodic protection (ukz) (Fig.2) contains a power transformer connected to the power lines, is tanzio cathodic protection (VHC), connected to the deep anode grounding (AZ) and pipelines, control and measuring points (KIP), which are derived output signals from the sensors corrosion rate (DSC) and sensors potentials (APS). Signals DSC and PD are transmitted to the control unit and control. Sensors potentials connected to the measuring transducer, connected to the control unit and the control.
Control unit and control connected to the RS-485 unit frequency (RF) communication, the output of which is connected to the filter connection (FP) linear high-frequency path, connected to the earthing knife (MN), and then through the coupling capacitor (CC) to the phase of the power lines.
To control the current to each of the deep anode ground (AZ) connected measuring transducer (PI), the output of which is connected to the control unit and the control.
Measurement of the current value of each of the deep anode ground provides automatic monitoring of its performance and ensures the quality of the technological process of electrochemical protection of pipelines, which is necessary for long-term operation of the deep anode ground, when there is a gradual dissolution of the anode electrode ground wire or the insulation fault current-carrying wire.
For example, in the case of an open circuit or is atrasheniya anode earthing the magnitude of the anode current becomes zero, what generates the control unit and the control signal "Fault". The signal of the defective anode earthing via the RS-485 enters the block frequency communication, and then through the filter attach (FC) and the coupling capacitor (CC) is one of the phases of the transmission line high voltage. This information transmission line through a coupling capacitor (CC) and the filter connection (FC) connected to block high-frequency communications dispatch center (Fig.1), is fed to the automated workplace (AWP) Manager, then the decision about sending crews to clear this fault.
To control the current at each point of the drainage (AP) (the point of connection to the pipeline) is connected measuring transducer (PI), the output of which is connected to the control unit and the control (Fig.2). The current measurement at the point of drainage provides rapid correction values to maintain the required value of the protective capacity of the pipeline and automatic control of technical condition of the join node and isolation of the conductive wire.
The channels of communication, organized by connection to the power lines, cheaper and more reliable channels created on the basis of radio channels, wired and fiber-optic lines, so as not to spend money on the equipment and the proper operation of communication lines, and the operational reliability of the transmission line is much higher than other communication channels.
The current measurement of each of the deep anode ground measuring Converter provides automatic monitoring of his health, which is necessary for long-term operation of the deep anode ground, when the dissolution of its electrodes or insulation fault current-carrying wire.
The measurement of the current at each point of the drainage of the measuring transducer provides rapid correction values to maintain the required value of the protective capacity of the pipeline and automatic control of technical condition of the join node or isolation of the conductive wire.
Thus, the use of high-frequency communication channel over the air transmission line and get more information about the work of deep anode ground wires and nodes joining in the drainage points will give the possibility to adjust the parameters of the process of electrochemical protection of pipelines and to prevent malfunction of the corresponding equipment that provides increased reliability of operation of the cathodic protection of gas pipelines.
Telemechanics system of monitoring and control of cathodic protection mA is astralnyh gas pipelines, contains the installation of a cathodic protection the cathodic protection stations, with blocks and control, pipelines, anode grounding, control and measuring points, sensor capabilities and speed sensor corrosion control point with workstation Manager, the communications channel between the cathodic protection stations and a control station, wherein the communication channel is arranged by connecting to overhead power line high-frequency chokes and capacitors communication, United with filters attached, provided with ground knives and connected to the blocks of the high-frequency communication, one of which is installed in a control room and associated with the workstation Manager, and others in the cathodic protection and associated with the control units and control, in addition to each of the anode to ground and to each point of the drainage pipe connected to the transmitter associated with the control unit and control.
FIELD: physics, control.
SUBSTANCE: invention relates to automatics and may be used in development of control systems of aviation objects, items of rocket-space engineering and robotic complexes operating under extreme conditions (wide range of temperature variation from -60 to +125°C, mechanical impact in the form of strikes and wideband vibration) in ionising radiation fields. The proposed system comprises actuating elements of a control object, an angular speed sensor, an acceleration sensor, an information collection unit, satellite navigation equipment, an inertial navigation subsystem, control computing devices, a sensor of external impact, a blocking signal generator, a memory with authorized access and actuating elements, a power supply subsystem, an image processing subsystem, a control unit and an optical correction subsystem.
EFFECT: improved efficiency of control system operation, namely, preservation of operability in case of any single failure in system equipment, and also preservation of functioning and accuracy of control in case of parametric changes in components caused by ageing, change of environmental temperature and dose factors of ionising radiation.
24 cl, 24 dwg
SUBSTANCE: proposed system comprises intake-and-discharge sealed station equipped with two-way controlled orifice valve arranged at vessel bottom. It includes device for vacuum feed of samples to measuring device. Said device consists of interconnected intake commutator, flow measuring cell connected to vacuum-pressure control system of said intake-and-discharge vessel. Note here that measuring cell comprises bottom inlet-outlet of fluids and is located at top point of sample feed line to rule out the ingress of said products into the meter at breakage of the film and covered by protection film from above. Besides, this system comprises control, indication and data transfer unit including pneumoelectric and electric devices equipped with programmable logical controller and digital processing program. Note here that it incorporates extra intake-and-discharge station coupled with the first one to make the pump. Said intake-and-discharge stations are identical and consist of two-way orifice valves while top covers accommodate sample level pickups and vacuum and pressure feed valves. Union to feed material at rarefaction of two-way orifice valves of both stations are interconnected via T-bend and flexible hose and connected with top union of flow measuring cell while union to feed material under pressure are interconnected by T-bend with flexible hose to drain measured sample portion in accumulation tank. Accumulation tank comprises union at its top part to receive sample from primary sampling system, measured sample return line, air separator and flushing water feed valve. Its bottom comprises T-bend connected with controlled drain valve and flexible hose for connection with measuring cell bottom union. Note here that air separator is composed of diffuser provided with conical splitter.
EFFECT: higher accuracy of measurements, continuous sample mixing, sample feed at rarefaction.
FIELD: physics; control.
SUBSTANCE: invention relates to a system of situation-analytical centres of an organisational system. The system comprises a telecommunication network, a control centre, situation-analytical centres, control points of departments of the organisational system, two-way communication means, means of monitoring surveillance objects, which affect the state of operations of the organisational system, and enables automated generation of scenarios using computer systems of the control centre, situation-analytical centres and control points of departments of the organisational system, storage of data on the scenarios in a system for storing data for auditing operations of the organisational system, which is part of the control centre, transmission of data on the scenarios via equipment interfaces of the control centre, situation-analytical centres, control points of departments of the organisational system and over the telecommunication network to computer networks of the control centre, situation-analytical centres and control points of departments of the organisational system, to video systems and a computer for setting up the video system of the control centre and situation-analytical centres, to multimedia screens of the control centre, situation-analytical centres and control points of departments of the organisational system to make decisions based on the generated scenarios.
EFFECT: high efficiency of the decision-making process owing to automated generation of scenarios for solving problem situations.
21 cl, 1 tbl, 30 dwg
FIELD: physics; control.
SUBSTANCE: invention relates to a method of supporting operation of an organisational system. The method comprises steps of forming blocks of standardised data on the state of support objects and operation of the organisational system, critical and allowable performance indicators of the organisational system, control commands for setting support objects into standardised or allowable states depending on the actual situation, setting support objects into standardised states, determining the actual states of support objects, evaluating the actual performance of the organisational system, determining blocks of data on the control commands required in the actual situation, optionally setting the support objects into standardised or allowable states based on the effect thereof on the types of operation in subdivisions of the organisational system and operation of the organisational system as a whole.
EFFECT: high efficiency of controlling information support of operation of an organisational system through automated evaluation of performance indicators of the organisational system and automatic control of support objects of the organisational system based on said evaluation.
24 cl, 50 dwg
SUBSTANCE: invention relates to the field of electrical engineering and may be used in electric power systems. Smart electric power system intended for improvement of control for utility system includes sensors at different sections of the above utility system with use of data transfer technologies and computer technology such as auxiliary bus structures in order to modernise the electric power system so that it operates effectively and reliably and to support additional services for consumers. The smart electric power system can include a smart distributing device in the utility system (separate from the control centre smart tools) that consists of units generating data at different sections of the electric power system, analyse generated data and modify operation of the respective section automatically.
EFFECT: improved control of the power supply networks.
46 cl, 37 dwg
FIELD: instrument making.
SUBSTANCE: fuzzy adaptive position method of automatic control of objects with discrete executive devices is proposed, which is realised by means of a logic controller and consists in generation of control parameters according to fuzzy rules and feeding these control parameters to an object. Control parameters generation is divided into two levels, at the first of which with the help of fuzzy logic they localise (identify) the control range, where further adaptation will be carried out. Localisation of the control range is carried out by definition of the main (base) value of the control parameter of this range according to the formula: Uad1=Uo(1-β)+Ukβ, where Uad1 - adaptable control parameter, Uo and Uk - control parameters in two extreme (opposite) conditions B of the object, β - normalised equivalent of object condition (β=0 at Bo, β=1 at Bk, where Bo - initial condition of the object, Bk - final condition of the object), taken as the value of the parameter of the adaptive middle position at this range, and at the second level the value of the control parameter is defined with the help of the adaptive three-position control method.
EFFECT: simplicity of realisation, improved quality of control, higher reliability of functioning due to substantial reduction of number of rules and more efficient control.
2 cl, 5 dwg
FIELD: physics, communication.
SUBSTANCE: invention relates to remote control over rod pumps, displacement pump, variable-speed drive etc, for example, used for extraction of hydrocarbons and drainage for them to be optimised. Device and method uses independent network server computer integrated with pump controlled arranged at every well in oil field. Will controller controls downhole pump in situ, processes well and pump data, generates surface and well diagrams and transmits reports on extraction, recommendations on improvement of extraction and production statistics at remote locations in Internet. Said controller can make remote requests for output of aforesaid reports via email or Internet messages, for example, at default state.
EFFECT: better serviceability, lower hardware costs.
19 cl, 9 dwg
FIELD: physics; control.
SUBSTANCE: invention relates to automated control systems for technological processes during ground testing of space-rocket equipment and can be used in developmental testing of aviation and transportation equipment, as well as chemical plants. The technical result is achieved through the apparatus for synchronising the control system for stand tests of space-rocket equipment and includes, in the processor of each master controller, a unit for interfacing with a local area network, connected through a control unit to a cycle counter, a cycle duration timer, a transportation delay register and a correction period counter, connected to a correction time register.
EFFECT: providing universal time and synchronisation of operating cycles of a distributed network of homogeneous master controllers irrespective of their number, arrangement and back-up version.
FIELD: information technology.
SUBSTANCE: disclosed is a control system which comprises a controlled device which is controlled by a controller, having receiving means for receiving control signals, and having a first, second and third storage locations for storing a personal identifier (ID) or address (PID), network ID (NID), and the ID (RCID) of a remote control device, respectively; at least one user-controlled remote control device for transmitting control signals. A control signal comprises a target address code, a network ID code, a sender address code and a command code. Normally, the controller only responds to control signals if target address code, network ID code, and sender address code match the information in memory. The controller is capable of operating in a NO NETWORK mode, in which the controller responds to a reset command irrespective of target address code, the network ID code, and the sender address code.
EFFECT: broader functional capabilities of the lighting control system by switching said system to an operating mode where system components will receive a rest command from any remote control device.
8 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: method for multialternative optimisation of automation modules of structural synthesis of mechatronic modular robots is proposed, in which at performance of synthesis of the multiinvariant model structure of mechatronic modular robots, and further fixation of obtained optimum solutions, a variety of design elements is considered and corresponding alternative variables are entered by presenting discrete numbers corresponding to those elements in binary notation; after that, the number of modules combined in one robot, mainly without distinct structure are marked, and connection of every new module is provided to earlier assembled ones along the chosen direction and coupling of its first interface platform is performed to one of the free ones on any other structural members occupying the closest extreme position in this or that row; after that, alternative variables are entered; at that, for optimisation structural synthesis there chosen are values of alternative variables
EFFECT: enhancement of a synthesis process; improvement of operating reliability of mechatronic modular robots.
2 cl, 4 dwg
SUBSTANCE: invention refers to the sphere of electrochemical protection for underground metal structures from corrosion, in particular to protection of pipelines. Device contains cathodic protection station is equipped with output voltage sensor and anode bed and the station can be connected to the protected facility through output current sensor; tracking station that can be connected to output voltage sensor and output current sensor and cathodic protection station; test station located close to cathodic protection station; the test station includes potential probe and potential metre connected to the probe, facility and tracking station; at that device contains additionally at least two test points connected to the power supply source which are remote from cathodic protection station and located at the protection zone boundary of cathodic protection station at its both sides along the protected facility; at that tracking station is equipped with central transceiver and each remote test station is equipped with resident transceiver connected to the central transceiver though communication channel.
EFFECT: improving efficiency of anticorrosion protection with reduction of power expenditures.
5 cl, 2 dwg, 1 ex
SUBSTANCE: system includes a protective coating applied to a protective cover of the hull in sections of action of ice in sea water and a cathode protection against corrosion; with that, protective coating is applied in the form of an erosion-resistant cladding layer from stainless steel, and anodes of the cathode protection are installed on underwater surface of external cover of the housing; besides, erosion-resistant cladding layer is made from stainless steel with carbon content within 0.01-0.04 wt %, and in addition, alloyed with titanium or niobium in the quantity of 0.05-0.50 wt %.
EFFECT: reduction of intercrystalline corrosion of a protective coating of hulls of sea vessels and facilities.
3 dwg, 5 cl
SUBSTANCE: method involves periodic plotting, near a cathode station, of a control curve f1 of the potential of the underground structure versus the logarithm of the current of the cathode station; determining the upper value of potential Uup, corresponding to the point of change of the slope of the control curve f1; determining and maintaining, between plotting of control curves, the optimum value of the potential of the underground structure, wherein control curves f2 and f3 of potential are further plotted in at least two more points lying on the boundary of the protective zone on both sides along the structure; for curves f2 and f3, current values In2 and In3, which correspond to the minimum standardised potential Umin, are determined; the highest of the current values In2 and In3 is selected; for the control curve f1, the value of potential corresponding to the highest current value is determined, which is taken as the lower allowable value Ulow, and the potential between values Ulow and Uup is selected as the optimum potential.
EFFECT: method increases reliability of protecting a structure on its entire length while reducing power consumption.
2 cl, 2 dwg
SUBSTANCE: device comprises a transformer, a rectifier, power switches, valves and filters of the main and N additional protected structures, amplifiers, integrators, pulse-width modulators and units of power switches control of the main and N additional protected structures, a sensor of potential difference of the main and N additional protected structures, a sensor of protective potential value of the main protected structure, a setter of potential of the main protected structure, a unit of comparison of the main protected structure, N sensors of protective potential value of additional protected structures, a corrector of the setter of the main protected structure, N correctors of the setter of additional protected structures, N units of comparison of additional protected structures, a scaling amplifier of the main protected structure and N scaling amplifiers of additional protected structures.
EFFECT: using the invention makes it possible to increase efficiency of cathode protection in case of exposure to external electric fields.
FIELD: electrical engineering.
SUBSTANCE: device contains a wind-powered generator, accumulator, pulse amplitude shaping unit, anode bed, reference electrode. The unit is connected with its first input to reference electrode and with its power supply inputs to accumulator outputs, with positive output to anode bed, with the second input and negative output to the protected structure; the unit has locking input and data exchange port. Additionally in the device there is a protector, circuit breaker, resistor, reserve control unit with two outputs and data exchange port, solar battery, the first and second isolating diodes, controller limiting charging rate of the accumulator; at that controller is installed between positive output of the accumulator and interconnected cathodes of the first and second isolating diodes. Anode of the first isolating diode is connected to positive output of wind-powered generator and the second isolating diode is connected to positive output of solar battery. Protector is connected with the first outputs of resistor and circuit breaker, which second output is connected to the second output of the resistor and connected to the protected structure. Reserve control unit is connected with its power supply inputs to outputs of the accumulator, with the first output to control input of circuit breaker, with the second output to locking input and with data exchange port to the data exchange port of pulse amplitude shaping unit.
EFFECT: device allows improvement of reliability for electrochemical protection of pipeline.
3 cl, 1 dwg, 1 ex
FIELD: electrical engineering.
SUBSTANCE: device contains electronic unit, anode bed and reference electrode. The electronic unit contains DC source, pulse amplifier, energy accumulator, pulse former. Energy accumulator is connected to pulse amplifier. The latter one is connected to pulse former, anode bed and the structure under protection. Reference electrode is connected to pulse former. DC voltage level converter is introduced into the electronic unit and connected to energy accumulator, DC source, pulse former. DC source is connected to pulse former. The device is equipped with hydrogen absorption sensor. Pulse former is connected to hydrogen absorption sensor and the structure under protection.
EFFECT: device allows increasing accuracy of polarisation potential within the whole length of the protected section with decrease of probability of hydrogen absorption by metal of which the structure under protection is made.
3 dwg, 1 ex
FIELD: electrical engineering.
SUBSTANCE: station contains cathode production channels designed with the possibility of connection of objects protected and anode beds, a converter module including a rectifier, a pulse-width modulator, a transformer with secondary windings connected to the cathode protection channels; each of the latter consists of the following elements connected in-series: an amplifier module, a rectifier module, a filter module and an adjustable ballast module; each amplifier module is connected to the control and protection module (generating current and voltage output control signals) via the current sensor; each adjustable ballast module is connected to the control and protection module via the voltage sensor while the control and protection module is connected to the converter module.
EFFECT: invention allows to enhance the device repairability and operation reliability and cathode protection effectiveness.
3 cl, 1 dwg
SUBSTANCE: this invention relates to suppression of corrosion in underground structures, particularly, in buried oil pipelines. Suppression of corrosion in one area of long metal structure comprises applying HF electromagnetic signal to structure to generate voltage standing wave with corrosion suppression potential in required areas of the structure. Additionally, electromagnetic signal frequency is adjusted to create standing wave nodal point about required corrosion suppression area. Apparatus to this end comprises means for application of HF electromagnetic signal to structure generate voltage standing wave with corrosion suppression potential in required areas of the structure and means to adjust standing wave frequency for adjustment of standing wave length. Oil well riser is equipped with corrosion suppression apparatus.
EFFECT: higher efficiency.
11 cl, 2 dwg
SUBSTANCE: station contains nonlinear resistance arresters, a circuit breaker, a power module, a shunt, the first and second sensors of a protective potential, the first and second blocks of comparison, an inverter, the first and second analogue switches, a combiner, power scaling, set point devices of maximum and minimum value of the protective potential, the first and second comparators, a generator, the first and second elements of "И", a bidirectional counter, a digital-to-analogue converter, a current setup unit, a current limiter, a supply voltage sensor, a voltage sensor on the power block, a current sensor, a protective voltage sensor, a door sensor, a cellular modem with a set of data inputs.
EFFECT: increased efficiency of pipeline corrosion protection by automatically adjusting possible deviations of the protective potential values along the pipeline length and maintenance of the protection potential value within tolerable limits.
FIELD: electrical engeneering.
SUBSTANCE: invention refers to the area of corrosion protection of underground metallic constructions. The station includes valve-type arresters, automatic shutdown device, power unit, shunt, indicator of protective polarization potential, current sensor, voltage sensor, first and second current reference-input elements, voltage reference-input element, divider, first and second resistance reference-input elements, first, second and third potential reference-input element, first and second current comparison units, voltage comparison unit, first and second resistance comparison units, first, second and third potential comparison units, high-resistivity amplifier, multiinput element OR with Schmitt trigger logic on each input, univibrator, first and second keys, direct-current converter, memory module, solid-state relay, cellular communication module with a set of information inputs and outputs.
EFFECT: use of the invention provides for increased effectiveness of pipelines corrosion protection by constant control of technologic parameters being in accessible range and producing of emergency signal in case of its violation with information being transferred to control center using cellular communication.
FIELD: protection of metals against corrosion; protection of extended underground gas lines against corrosion.
SUBSTANCE: proposed method includes restoration of defective sections of gas lines by application of insulating protective coats and connection with cathode protection system; defective section of gas line is preliminarily disconnected from gas main and is freed from natural gas; gas released from this section is compressed and is charged in reservoirs under pressure; gas line surface is cleaned from soil and defective coat by forming temperature gradient and stresses between defective coat and gas line; then finish cleaning of outer surface of gas line is performed at simultaneous suction of dust and gas line is heated to temperature of 70 to 175°C, after which layers of adhesive composition and dielectric insulating coat are applied at succession at overlapping joints between steel pipes of gas line and layer of spiral-shaped coat made from metal at potential more negative as compared with potential of gas line being protected; metal coat is applied in form of tape or foil whose ends are brought out at distance of (0.01-1)d, where d is diameter of pipe. Then, insulating plastic coat is applied on metal coat and after erection of gas line, ends of tape or foil are electrically connected at points of joints of steel pipe over entire length of gas line through switching units and parameter measuring units.
EFFECT: enhanced reliability of corrosion protection; considerable reduction of energy expenses; increased service life of metal coat.
3 cl, 10 dwg