Electronic transformer

FIELD: electricity.

SUBSTANCE: electronic transformer comprises a first AC voltage network, a first LC filter, a nine-key transducer, a second LC filter, a second alternating voltage network connected in cascade, characterized in that a storage reactor is introduced, and a nine-key transducer is made on fully controllable key with double-ended conductivity. The storage reactor is connected by its clamps to the upper and lower three keys of the nine-key transducer.

EFFECT: invention makes it possible to increase the voltage conversion factor, since now both stages of the electronic transformer contribute to an increase in the output voltage of the electronic transformer.

2 dwg

 



 

Same patents:

FIELD: electricity.

SUBSTANCE: in electromechanical insert for connecting power systems the double supply machines (5 and 6) are connected to different energy systems (1 and 2) and coupled by rotors to converters (9 and 10) through five rings 11 instead of a standard number of six rings.

EFFECT: improved reliability and simplified design.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of switching, transformation and long distance transmission of electric power. The electric network is formed by two parallel high voltage lines the wires of which on each side are connected through breakers to phase leads of two linear windings of the transformer(s), neutral leads of phases of linear windings of the transformer(s) are connected as follows: by the phase B of windings (2) and (3) between groups of gates (9, 10 and 11, 12), the phase A of the winding (2) and the phase C of the winding (3), the phase C of the winding (2) and the phase A of the winding (3) between groups of gates (9, 12 and 10, 11) respectively, by the phase C of windings (5, 6) between groups of gates (13, 14 and 15, 16), the phase A of the winding (5) and a phase B of the winding (6), the phase B of the winding (5) and the phase A of the winding (6) between groups of gates (13, 16) and (14, 15) respectively, and groups of semiconductor gates on each of the sides are implemented controllable, closed in a ring, and one of points between groups of gates on each side is grounded.

EFFECT: improvement of reliability and profitability of the switching equipment and electric network.

6 cl, 2 dwg, 4 tbl

FIELD: electricity.

SUBSTANCE: according to the method in the presence of interconnection with large power association, on the basis of measurements of casual deviations of active power and frequency in the course of operation of a power supply system, the dependence of an average per time unit of number of crossings of pre-set level of casual deviation of active power on interconnection from the size of this level. In absence of interconnection the similar characteristic for casual deviations of frequency in a power system is determined, and, combining the obtained characteristics by average of crossing of levels per time unit, the frequency characteristic is determined. If necessary to determine the characteristics for different current values of power of a power system from the common array of measurements the arrays are allocated for various values of power of a power system and the frequency characteristic for each of these arrays is determined.

EFFECT: obtaining the total frequency characteristic of the power system with limited power.

2 cl

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and may be used for transmission of electric power to consumers through a non-symmetric three-wire power transmission line. Initial data on voltage and current in the line can be obtained through interfaces or sensors made in a form of voltage or current transformers, spectrum analyzers, voltage dividers and alternating-current shunts. In result of initial data processing by the processor control signals are generated for correcting elements, which can be represented by direct voltage regulators of power transformers, automated process systems, electric energy accumulators, active power sources such as low-power hydroelectric power plants or electric power plants of other types.

EFFECT: matching of three-wire power line with electrical load is reached in result of fulfilment of certain conditions involving comparison of actual and reference load resistance, voltage in the line end and currents supplied to the load.

3 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering, particularly, to emergency control. In the claimed method that considers power flow cross-effects for the network components by impact on the electrical devices capable to regulate their longitudinal resistance the complex system is divided into aggregates of controlled and uncontrolled subsystems creating minimum cross-effect, at that control of the components overloading is made cyclically and separately for each subsystem, automatic equipment for each subsystem controls the current mode, and in case of overloading calculation of control actions is made by solving the linear task of optimization, overloading of the network components is prevented by issue of data on control actions to the devices capable to regulate their longitudinal resistance.

EFFECT: solving tasks of automated distributed control to unload network components of the power pool system, redistribution of power flows in the power pool system is fundamental for the suggested method in order to decrease loading of the overloaded components.

3 dwg

FIELD: electricity.

SUBSTANCE: controller has option of connection to process devices interacting in their turn with primary devices intended for first area. Distributing controller has standard description of first area network readable by device and identification mark of length of network section that is not connected to first area anymore in result of change in network configuration. Besides, distributing controller can transmit description of a separate section to the second distributing controller which controls the second area or adjoining area of power distribution to which network section is connected in result of change in network configuration. Due to option of description transmission of network section that changed its identity there is no need to maintain and update description of all network in each controller of power distribution system.

EFFECT: simplification of distribution control.

10 cl, 3 dwg

FIELD: electricity.

SUBSTANCE: during regulation of active-power flow between power system parts connected with power line (1), unbalance of active power on shaft (11) of generating unit is monitored, active-power flow over line (1) is changed by adjusting phase angle between voltage vectors in its end-points on buses (2) and (3) by means of controlled phase-slue device (12) included in line (1). Limited time interval is allocated, within which unbalance of active power is compensated by means of transferring electric energy accumulator (7) into discharging or charging mode when there is deficiency or excess of active power respectively, and power balance is restored by corresponding changing power generated by unit.

EFFECT: higher speed of active power adjustment without lowering electric energy quality and power system stability margin.

4 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: device (1) for power flow control in three-phase alternate current transmission line includes serial transformer unit (10), voltage transformer unit (20) and reactance unit (30), connected in sequence between secondary winding of voltage transformer and earth, while primary winding of serial transformer of each phase is connected to definite connection points between adjustable reactances of the other two phases of transmission line.

EFFECT: improved reliability and responce.

10 cl, 25 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to energotechnological processes, based on converting energy supplied at the process input into a product at the output. The system contains an automated unit for controlling an object (1), unit for determining energy carrier consumption (2), unit for determining productivity (4), unit for setting up time (5), units for determining instantaneous values of energy carrier consumption (7) and productivity (9), unit for determining instantaneous value of energy consumption (8), unit for determining the parametre characterising the process (6), unit for predicting energy consumption (10) and a decision making unit (11). The system provides for prediction of the instantaneous value energy consumption using results of analysing the time history of energy consumption.

EFFECT: provision for energy saving in energotechnological processes.

3 dwg, 3 tbl, 3 ex

FIELD: electrical engineering.

SUBSTANCE: present invention relates to energotechnological process for obtaining products, based on receiving and converting energy at different stages of the energotechnological process and can be used for saving energy in these processes. The method involves the following. The whole energotechnological process is divided into stages; energy measuring devices are fitted and energy in each stage is measured or calculated; energy consumption of stages in the initial version of carrying out the energotechnological process is determined; energy saving measures are outlined, which can be regulation of parametres, change of modes, replacement of elements, other technical, technological, production, organisation measures, aimed at increasing efficiency of the given stage of the energotechnological process; energy consumption of stages with introduction of the outlined energy saving measures is determined; the efficiency factor of the energy saving measures is calculated; the energotechnological process is carried out using energy saving measures on each stage, such that its overall efficiency factor assumes the maximum value.

EFFECT: provision for energy saving based on optimising energy saving measures in all the stages of the energotechnological process.

2 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to power supply systems of 27.5 kV electrified railroads. Device to provide parallel operation of traction substation with main transformer and traction substation with balancing transformer consists of attachment device with two-phase primary winding, B and C phases of which are interconnected into open delta by node connected with end of phase B of main transformer secondary winding. One output of two-phase primary winding is connected simultaneously with end of phase A, beginning of phase B of secondary winding of main transformer and beginning of phase C of secondary winding of attachment device connected into fork by ends of legs of phases B and C. Other output of two-phase primary winding of attachment device is connected simultaneously with beginning of secondary winding of phase A and with end of phase C of main transformer. Ends of phases B and C of secondary winding of attachment device are connected into common node, and beginning of its phase B is connected to contact system of intersubstation providing turning of voltage vector of main transformer secondary winding through 15°.

EFFECT: reduced power losses.

2 dwg

FIELD: technology for automation and control over processes, for adjusting electric power of several field devices.

SUBSTANCE: in the method for adjusting electric powering of several field devices S1,S2,S3,A1,A2, connected by DBL data bus line and powered through DBL data bus line by electric power, need of several field devices S1,S2,S3,A1,A2 in electric energy and electric energy consumption by field devices field devices S1,S2,S3,A1,A2 are set by means of appropriate controlling signals. Due to that consumption of energy by separate field devices S1,S2,S3,A1,A2 can be centrally set and, thus, synchronized with conditions of process.

EFFECT: simple and efficient setting of energy flow values by separate field devices.

4 cl, 2 dwg

FIELD: power engineering, possible use for transferring electric energy along alternating current lines.

SUBSTANCE: device has two unsynchronized synchronous machines mounted on shaft, primary circuits of each one of them have linear switch, one of clamps of which is connected to its own power system, and another clamp of them is connected to appropriate clamp of linking switch, power transformer and bus switch, secondary circuits of each unsynchronized synchronous machine contain static frequency transformer and control system, also it is provided with detachable sleeve.

EFFECT: increased reliability and quality of functioning of power systems, improved operation mode of device.

1 dwg

FIELD: electric engineering.

SUBSTANCE: method consists in the fact that impact of known values at deviation of measured level of electric energy consumption from earlier designed electric energy consumption schedule is accounted, and accordingly additional sources of electromotive force are connected or excessive ones are disconnected. And also other switching processes are performed in electric grid in every moment of time of the following period of electric energy consumption so that values of parameters of generated, transmitted, transformed and distributed electric energy approach values of designed electric energy consumption table for this period of time.

EFFECT: provision of stable frequency and voltage of electric current in power system, higher reliability of power system and reduction of consumer expenses.

19 cl

FIELD: electric engineering.

SUBSTANCE: electric power system contains two parts of power system joined by substation, preferably at different levels in power system hierarchy, facility for control of electric energy overflow between two parts depending on the level of stressed condition of corresponding part of grid power system.

EFFECT: simplification of control process and higher reliability due to minimisation of damages.

13 cl; 7 dwg

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and can be used to operate at joint centres of electric power consumption for instance for large municipal areas or geographical regions. In the method and the device for improvement of alternating currant power transmission system dispatching capabilities, electric power transmission system provides isolation of local alternating currant power supply system from surrounding alternating current system, and local centre of alternating current power consumption has multiple local alternating current loads and distributing system feeding line that supplies multiple local alternating current loads. Additionally there is at least one remote power station or other electric power source to deliver alternating current electric power to local centre of alternating current power consumption. To isolate alternating current electric power received from remote power station from local centre of alternating current power consumption by converting alternating current electric power into direct current electric power, full or partial ring of direct current power lines are created between local centre of alternating current power consumption and remote power station. Then the second conversion of direct current electric power into alternating direct current electric power is performed on the basis of demands in electric load. Feeding line of distributing system delivers alternating current electric power from remote power station providing isolation of all local alternating current loads.

EFFECT: providing stability of alternating current - direct current - alternating current power supply with simultaneous power flow control in all incoming and outgoing power lines carrying alternating and/or direct current.

23 cl, 4 dwg

FIELD: electrical engineering.

SUBSTANCE: present invention relates to energotechnological process for obtaining products, based on receiving and converting energy at different stages of the energotechnological process and can be used for saving energy in these processes. The method involves the following. The whole energotechnological process is divided into stages; energy measuring devices are fitted and energy in each stage is measured or calculated; energy consumption of stages in the initial version of carrying out the energotechnological process is determined; energy saving measures are outlined, which can be regulation of parametres, change of modes, replacement of elements, other technical, technological, production, organisation measures, aimed at increasing efficiency of the given stage of the energotechnological process; energy consumption of stages with introduction of the outlined energy saving measures is determined; the efficiency factor of the energy saving measures is calculated; the energotechnological process is carried out using energy saving measures on each stage, such that its overall efficiency factor assumes the maximum value.

EFFECT: provision for energy saving based on optimising energy saving measures in all the stages of the energotechnological process.

2 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to energotechnological processes, based on converting energy supplied at the process input into a product at the output. The system contains an automated unit for controlling an object (1), unit for determining energy carrier consumption (2), unit for determining productivity (4), unit for setting up time (5), units for determining instantaneous values of energy carrier consumption (7) and productivity (9), unit for determining instantaneous value of energy consumption (8), unit for determining the parametre characterising the process (6), unit for predicting energy consumption (10) and a decision making unit (11). The system provides for prediction of the instantaneous value energy consumption using results of analysing the time history of energy consumption.

EFFECT: provision for energy saving in energotechnological processes.

3 dwg, 3 tbl, 3 ex

FIELD: electricity.

SUBSTANCE: device (1) for power flow control in three-phase alternate current transmission line includes serial transformer unit (10), voltage transformer unit (20) and reactance unit (30), connected in sequence between secondary winding of voltage transformer and earth, while primary winding of serial transformer of each phase is connected to definite connection points between adjustable reactances of the other two phases of transmission line.

EFFECT: improved reliability and responce.

10 cl, 25 dwg

FIELD: electricity.

SUBSTANCE: during regulation of active-power flow between power system parts connected with power line (1), unbalance of active power on shaft (11) of generating unit is monitored, active-power flow over line (1) is changed by adjusting phase angle between voltage vectors in its end-points on buses (2) and (3) by means of controlled phase-slue device (12) included in line (1). Limited time interval is allocated, within which unbalance of active power is compensated by means of transferring electric energy accumulator (7) into discharging or charging mode when there is deficiency or excess of active power respectively, and power balance is restored by corresponding changing power generated by unit.

EFFECT: higher speed of active power adjustment without lowering electric energy quality and power system stability margin.

4 cl, 1 dwg

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