Protection and diagnostic method for in-series thyristors and device for its implementation |
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IPC classes for russian patent Protection and diagnostic method for in-series thyristors and device for its implementation (RU 2535290):
 Step-up voltage converter / 2534742
Step-up voltage converter comprises an input circuit with a choke in one of branches, two power keys, two diodes, and a starting key with a resistor shunting it and two in-series output capacitors. In order to improve reliability of semiconductor elements and prevention of the core saturation upon supply of input voltage should be performed in four stages. Unbalanced conditions of the converter operation are eliminated by introduction into the scheme of two auxiliary keys controlled by two auxiliary drivers and two operating amplifiers (OA). A resistor is connected in series with each auxiliary key and each operating amplifier contains series circuits, which consist of a diode and resistor thus ensuring hysteresis of connection and disconnection of the auxiliary keys.
 Method for discharge of intercondenser of double-link valve voltage inverter / 2534042
Invention is related to the method for discharge of intercondenser (Czk) of double-link valve voltage inverter (2), wherein the electric energy converter (4) mounted from the network side has switched power semiconductor devices (A1, …, A6); it is intended to connect alternating-current network by means of the series circuit of preset charging contactor (VS) and preset charging resistance (RV), transformer (T) and the main circuit breaker (HS) switched by the network contactor (NS). According to the invention the main circuit breaker (HS) and the network contactor (NS) are open, at that the preset charging contactor (VS) is closed, at that two diagonal opposed power semiconductor devices (A1, A4; A2, A3) of the electric energy converter (4) are switched on.
 Method of detecting fault in pulsed current source and corresponding electric power source / 2527480
Invention relates to electrical engineering. The method of detecting a fault in a pulsed electrical source (1), having a control stage (2) configured to transmit, in response to a setting signal, a control signal which is modulated with a given duty ratio value (α), to a power stage (3) configured to feed electricity to a lead (100), wherein the method includes steps of determining at least one nominal value (αmin, αmax) of the duty cycle during normal operation, and at least one breakdown threshold (αsc, αoc) as a function of the nominal value; determining at least one instantaneous value (α) of the duty cycle of a signal output by the control stage (2); and comparing the instantaneous value with the breakdown threshold. A detection circuit which carries out said method.
Method to recognise contamination and/or formation of dew on components of ac frequency converter with intermediate voltage circuit / 2526372
Invention relates to the field of electric engineering and may be used to recognise contamination and/or formation of dew on components of an AC frequency converter with an intermediate voltage circuit. In the method to recognise contamination and/or formation of dew, at least, during the process of preliminary charge of the intermediate circuit capacitor, having at least one capacitor, the AC frequency converter with the intermediate voltage circuit, a time characteristic is determined for the pulse current of partial discharge, besides, using this current pulse, a frequency spectrum is calculated, and depending on the result a warning is activated on contamination and/or a warning on dew formation.
 Method and system to control bridgeless corrector of power ratio by means of digital signal processor / 2525837
Invention relates to the field of electric engineering and may be used in converters within a power supply system of electronic, electromechanical and lighting equipment. In the method of power ratio corrector control during the interval of positive half-wave of the supply voltage of the grid the first power key is maintained in the connected condition, and control pulses arrive to the second power key. During the interval of the negative half-wave of the supply voltage of the grid the second power key is maintained in the connected condition, and control pulses arrive to the first power key, at the same time the inlet voltage is measured by the control system based on the digital signal processor with the help of two half-wave rectifiers with identical division ratios.
 Magnetising current limiter for transformer of push-pull voltage converter / 2522174
Invention is related to devices converting direct current to direct current, and namely to control systems of such devices and it may be used in push-pull voltage converters in order to limit magnetising current of the transformer. The substance of the invention consists in the following. Current sensors generate signals proportional to currents passing through the primary and secondary windings. A magnetising current valuator generates a signal proportional to magnetising current equal to the difference in current of the primary winding and adjusted current of the secondary winding. The input voltage sensor generates a signal proportional to supply voltage of the converter. The received signal is used as the reference for determination of a limitation level for magnetising current. The comparator generates a logical "1" when magnetising current is more than the reference signal and a logical "0" when magnetising current is less than the reference signal. A comparator, a pulse-width modulator and logic gates AND generate control signals for the push-pull voltage converter.
 Device for connecting controlled voltage inverter to direct current voltage source / 2521613
Device comprises current limiting circuits, one circuit per each input terminal of a rectifier, each circuit couples the input terminal of the above device connected to one of the output terminals of the above voltage source with the output terminal of the above device connected to one of the input terminals of the controlled voltage rectifier; each current limiting circuit consists of an inductive element, the first and second reactors, a capacitor as well as the first and second switches, in each current limiting circuit in the device there is an auxiliary parallel damping resistor and the third switch, which are coupled between the first terminal of the inductive element and the first terminal of the capacitor.
 Reactive power control systems, devices and methods / 2519636
Invention is related to the field of electric engineering and may be used for reactive power control in power supply systems for such devices as digging machines of different type, which are used for mining operations. The approximate defined embodiments can provide an adapted system, a device, manufacture, a scheme and/or a user interface and/or a method and/or a machine-readable medium containing instructions for activities that can contain by means of the preset data device for the preset digging machine consisting of a variety of active input cascades, at that each active input cascade is coupled electrically to the AC power mains of the above digging machine, each active input cascade is adapted to supply DC power to the DC bus, the above DC bus is coupled electrically to a variety of inverters and each inverter is adapted to supply AC power to at least one operating motor, an active power control is formed by each active input cascade in an independent way.
 Integrating device of synchronisation / 2507668
In the proposed device of synchronisation between buses A, B, C and A2, B2, C2, there are seven summators and two adaptive periodical filters of the first order included, providing for filtration of a three-phase system of voltages without connection of a zero wire, and in generation of sync pulses based on comparison of voltages of a three-phase system there are another three additional summators used, which exclude a requirement of availability of a zero wire.
 Alternating-current valve inverter with distributed braking resistors / 2506691
Invention pertains to electrical engineering and can be used for drives and in high voltage electrical machine building. In alternating-current valve inverter braking resistance has several separate braking resistors (18) which form part of bipolar submodules (14) respectively; at that in case of in-series connection of submodules (14) they are connected in series and contain at least energy accumulator (16) connected in parallel to a matched braking resistor (18) and controlled high-power semiconductor (28) for braking which in braking position allows passage of current through respective separate braking resistor (18), and in position of normal operation mode it stops passage of current through it.
 Method to lock ac rectifier with distributed energy accumulators / 2526374
Application: in the field of electrical engineering. Invention relates to the method to lock an AC rectifier (2) with distributed energy accumulators (CSM) with at least two modules (41, 42, 43) of phases, which have appropriate upper and lower branches (P1, P2, P3, N1, N2, N3) of valves, which have appropriate multiple electrical serially connected bipolar submodules (SM1, SM2,…, SMn), which have an appropriate unipolar accumulating capacitor (CSM), with which electrically in parallel the circuit of serial connection is connected, from two disconnected semiconductor switches (S1, S2) with an appropriate antiparallel connected diode (D1, D2). In accordance with the invention submodules (SM1, SM2,…, SMn) of upper and lower branches (P1, P2, P3, N1, N2, N3) of valves of the module (41, 42, 43) of the phase of the AC rectifier (2) are controlled in cascades in time for switching into a switching state III.
Method to recognise contamination and/or formation of dew on components of ac frequency converter with intermediate voltage circuit / 2526372
Invention relates to the field of electric engineering and may be used to recognise contamination and/or formation of dew on components of an AC frequency converter with an intermediate voltage circuit. In the method to recognise contamination and/or formation of dew, at least, during the process of preliminary charge of the intermediate circuit capacitor, having at least one capacitor, the AC frequency converter with the intermediate voltage circuit, a time characteristic is determined for the pulse current of partial discharge, besides, using this current pulse, a frequency spectrum is calculated, and depending on the result a warning is activated on contamination and/or a warning on dew formation.
 Device to control and ensure durability of double-fed motor / 2525294
Device to control and ensure durability of a double-fed motor comprises an induction motor, a frequency converter made of a controlled rectifier and an inverter, a three-phase transformer. The rectifier is made as a grid thyristor converter, and the inverter - as a rotor thyristor converter arranged in accordance with a bridge three-phase circuit. The device additionally comprises current sensors, protective elements, two reserve half-bridges, each comprising three symistors and two reserve thyristors, and a microcontroller, which is connected to all thyristors and symistors. The specified elements are connected as specified in application materials.
Device to control and ensure durability of double-fed motor / 2525294
Device to control and ensure durability of a double-fed motor comprises an induction motor, a frequency converter made of a controlled rectifier and an inverter, a three-phase transformer. The rectifier is made as a grid thyristor converter, and the inverter - as a rotor thyristor converter arranged in accordance with a bridge three-phase circuit. The device additionally comprises current sensors, protective elements, two reserve half-bridges, each comprising three symistors and two reserve thyristors, and a microcontroller, which is connected to all thyristors and symistors. The specified elements are connected as specified in application materials.
 Device to control excitation of ac motor / 2507658
Device to control excitation of an AC motor including: an inverter (INV), having multiple switched elements exposed to control by connection/disconnection, to convert DC voltage into AC voltage with required frequency, in order to excite an AC motor (6); an opening contactor (MMK) of the motor connected between the inverter (INY) and the AC motor (6); a unit (55) of preliminary detection of a switching operation for detection of the switching operation of the opening contactor (MMK) of the motor to the contact or disconnection of the main contacts and release of a signal of preliminary detection of the switching operation; and a control unit (10A), comprising a unit (70) of inverter control for control of connection/disconnection for multiple switching elements and control of disconnection for an opening contactor (MMK) of the motor and control of the inverter (INV) on the basis of the signal of preliminary detection of the switching operation.
 Concentrator power module (cpm) of uninterruptible power supply system for electronics (versions) / 2498474
At the first facility the claimed device contains two devices protecting from peak overvoltage in AC mains (PDAC) and DC mains (PDDC), stabilised voltage converter (SVC), stabilised voltage inverter (SVI), control unit (CU) and inputs and outputs of single-phase alternating and direct current; CPM contains additionally DC voltage switch (VSDC), three transistor switches, three diodes and three shapers for switching on. As for the second facility the claimed device contains two devices protecting from peak overvoltage in AC mains (PDAC) and DC mains (PDDC), stabilised voltage converter (SVC), stabilised voltage inverter (SVI), control unit (CU) and inputs and outputs of single-phase alternating and direct current; CPM contains additionally DC voltage switch (VSDC). At that it contains together with VSDC nine transistor keys, nine diodes and ten shapers for switching on.
 Method of control in case of redundancy of multi-phase ac rectifier with distributed energy accumulators / 2494512
Invention may be used to control an AC rectifier with distributed energy accumulators with three phase modules, which have accordingly one upper and one lower branch of valves, which are equipped accordingly with three electrically serially connected dipole subsystems (10). In accordance with the invention the failed subsystems (10) of a faulty branch (T2) of valves and the subsystem (10) of a good branch (T1) of valves of a faulty phase module (100), corresponding to the quantity of failed subsystems, are shorted, capacitor voltages (Uc) of remaining subsystems (10) of the faulty phase module (100), are increased in such a manner that their sum is equal to the sum of capacitor voltages (Uc) of subsystems (10) of the good phase module (100), and the subsystem (10) of good phase modules (100) are controlled as if before a failure of one subsystem (10). Therefore, at the outputs (L1, L2, L3) of the AC rectifier (102) with distributed energy accumulators (9) in case of a failure a symmetric system of voltages is produced with maximum amplitude.
 Source of dc voltage / 2491693
Device contains a overvoltage protection unit, switching device, phase current sensor, transformer, rectifier, ripple filter, output current sensor, lightning overvoltage protection unit, power supply transformer for protection units, rectifier for protection units, actuator of protection units, overvoltage protection unit, operating time counter, control unit, power supply transformer for control unit, power supply source, signal amplifying unit, protection unit, current control unit, mode select switch, active filter unit, voltage divisor, voltage follower and low-frequency active filter equipped with current controller, control unit of the current controller and time counter for availability of protection potential (current).
 Frequency converter / 2470438
Invention relates to conversion equipment and is designed for use in electric AC drives controlled by optoelectronic insulators, and sources of secondary power supply. In the frequency converter with an intermediate link of DC and a power unit, representing a bridge circuit on transistor keys, apart from protection of these keys against failure in case of throughput current in a bridge arm and in transition processes of converter disconnection, an additional protection is introduced for control of a bridge inverter in transition processes of converter elements supply. The additional protection consists in the fact that control of the bridge inverter is provided only in the case, if voltage of converter elements supply is more than 4.5 V. Otherwise, control of the bridge inverter will be blocked.
 Method for reliable control of common variable frequency electric drive / 2463698
Frequency converter (FC) (1) accelerates the electric motor (6) and ensures its operation at a frequency other than the mains frequency. In these modes the commutators (2) and (4) are (5), (8) are (9) are open. After the motor (6) acceleration and during its operation at a fixed mains frequency the commutator (8) while the commutator (4) is tripped with the FC (1) out of operation. The motor (7) is out of operation and in the backup preparedness condition. In case of breakdowns in the motor (6) the controller (10) puts the backup motor (7) into operation. In case of the FC (1) internal breakdowns and faults the controller (10) switches the installation to the relay control mode with power supply from the mains. In case of the breakdown object unrevealed (unclassified failure) the controller (10) locks the FC (1), disconnecting it from the commutator 4 and the motor (6). For a short period of time the FC (1) is actuated to run idle. The breakdown recurrence means its localisation within the FC (1) which becomes tripped. The whole installation is switched to the relay mode with the motor (6) connected to the mains (3) through the controller (10) affecting the commutator (8). If in the process of the FC (1) idle run testing the breakdown fails to recur, the controller (10) concludes malfunction of the motor (6) and puts the motor (7) including the commutator (5) into operation from the FC (1).
 Forecasting method of emergency mode of functioning of pulse-width converters in real time / 2504064
Preliminary studies by using a nonlinear model of the PWM power converter the following are determined: emergency amplitude ripple voltage at the inverter output, time periods in the pulse-width modulation amplitude between successive measurements of the voltage ripple on the output of the converter, which is minimally required for recognition of these changes of these measurement results, the factor considering the worst possible joint effect of inductance in the power converter circuit and power capacitors at the amplitude of the pulsations of the inverter output. In operation, the transducer measures the current ripple amplitude at the output, the result is stored. After each successive measurement of the amplitude of the output voltage ripple, the change of the amplitude is determined with respect to the value in memory. The result is corrected using the previously mentioned ratio. The change is compared with the adjusted alarm value, based on this comparison, is projected upon reaching emergency pulsation amplitude values, leading to an emergency mode. Forecasting is repeated after each new measurement of the amplitude of the output voltage ripple of the converter.
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FIELD: electricity. SUBSTANCE: protection and diagnostic method for in-series thyristors lies in stoppage of control pulses delivery as a protective measure, performance of control over state of the thyristors against reverse voltage and operating temperature of valve coolers. In the method correct operation of communication lines is controlled by pulse-phase control system against feedback response, distribution of reverse voltage is measured in each operating cycle of the valve groups. When maximum allowable temperature of the valves is exceeded or rated value of reverse voltage distribution is decreased or in case of lost connection with the pulse-phase control system protective measures are taken by removal of pulses from all thyristor groups and cutoff of the converter from the network or by removal of control pulses only. By means of the analysis for reverse voltage distribution and operating temperature of thyristors an emergency failure due to the thyristor performance degradation is prevented. The device for protection and diagnostics is described for in-series thyristors. EFFECT: improving protective functions and ensuring diagnostics for the three-phase rectifier with in-series connection of thyristors. 2 cl, 2 dwg
The invention relates to electrical engineering and can be used to protect the thyristor Converter. It is known device for controlling the breakdown of series-connected thyristors for high-voltage valves in a controlled Converter including a control system with auxiliary power source, the system pulse-phase control pulse distributor control high-voltage valves, a unit of General signal groups of series-connected thyristors, containing on each of the high-voltage valve sensor breakdown of thyristors, is provided on the number of stages control the number punched thyristor output switches, the first outputs of which are combined and are intended for connection to the output of the pulse distributor associated with the control electrodes of the thyristors of a high-voltage gate opposite group of the same phase, and second findings of the output switches sensors of different high-voltage valves United, the memory elements by the number of steps of controlling the number punched thyristors, outputs designed for connection to respective outputs of block signals of groups of series-connected thyristors controlled analog switches by the number of steps of controlling the number punched thyristors and the pulse shaper block the key, made in the form of a diode, a discharge resistor, bit key, a threshold element and a timing resistor and capacitor. The output of the threshold element connected to the output of the pulse shaper block and through the diode connected to its input connected with the control input bit key, forming a series with the discharge resistor circuit connected between the common Tina and the input of the threshold element. Ramasadaya the resistor and the capacitor of the first outputs are intended for connection respectively to the output of the auxiliary power source and the common Tina and second terminals are connected to the input of the threshold element. Combined second, the conclusions of the output keys of the same name speed control quantity punched thyristors sensors breakdown connected with the inputs of the respective memory elements through respective controlled analog switches, control inputs connected to the output of the pulse shaper block, the inlet of which is connected to the output of the block driver control pulses (SU 1760595, IPC H02H 7/12, publ. 07.09.1992). There is a method of protection thyristor Converter, which monitor the condition of the thyristors, measure the time of simultaneous conduction of any pair of thyristors belonging to a controlled group, compare it with the established allowable time switching, and in case of exceeding the measured time of the maximum allowable time commutation produce a protective effect. As the protective effects cease the supply of control pulses, and then measure the time a non-conductive condition of all thyristors of this group and in case of exceeding of the set time resume the supply of control pulses (SU 1534620, IPC H02H 7/12, publ. 07.01.1990). The disadvantages of the known device and method are: 1. The lack of galvanic isolation of the control unit from the power part of the Converter-side sensors conductive state of the thyristor, which reduces the reliability of the device 2. In case of breakdown of one of the serially connected thyristors distribution of voltage across the thyristors will change to n-1 of the thyristors will be accompanied by a high reverse voltage, which will cause an avalanche breakdown of the remaining thyristors, which will subsequently lead to the failure of the thyristor unit Converter 3. Nonsynchronous removing the control pulses, which leads to increased switching overvoltage SCR groups a series connection and, consequently, reducing their service life, 4. The inability to prevent accidental failure of the thyristor due to degradation of its parameters 5. The absence of selective multi-tier protection thyristor Converter, 6. The lack of protection in excess of the limit of RA is the sight of the temperature of each thyristor in the group. The technical result is improved protective and introduction of diagnostic functions three-phase rectifier with sequential switching of the thyristors. The technical result is achieved in that in the method of protection and diagnostics of series-connected thyristors, in which the protective effects cease the supply of control pulses, monitor the state of the thyristors in inverse voltage and operating temperature coolers valves, control the proper lines of communication with the pulse-phase control feedback response, measure the reverse voltage distribution in each cycle of the valve groups, and when exceeding the maximum permissible temperature of the valves or decrease of the nominal value of reverse voltage distribution, or disconnection system with pulse-phase control produce a protective effect by removing pulses from all of the thyristor groups and disconnection of the inverter from the network, or only removing the control pulses, and by analyzing the measured distributions reverse voltage and operating temperature on the thyristor warn about emergency failure of the thyristor due to degradation of its characteristics. In the protection device and diagnostics of series-connected thyristors, in which with an auxiliary power source, system pulse-phase control connected with block breakers control pulses, the findings of which are connected to the blocks of the common signals of groups of series-connected thyristors, the block n of series-connected thyristors with damper RC circuits with individual drivers running on the cathode side, is connected with the auxiliary power source by means of a compact high-frequency transformers, and from system pulse-phase control using fiber-optic communication lines, the findings of thermistors are connected to the drivers, and the unit of General signal groups of series-connected thyristors is connected to the Electromechanical release. Structural diagram of the device shown in Fig.1 and illustrating Fig.2. The device includes (Fig.1) the auxiliary power source 1, a system of pulse-phase control (RF) 2, is connected with block breakers control pulses 3, the findings of which are connected to the blocks of the common signals of groups of series-connected thyristors 4. Block n of series-connected thyristors with damper RC circuits 5 are equipped with individual drivers 6, 7, 8 on the cathode side, connected by an auxiliary power source 1 by means of a compact Vysokoye the different transformers 9, 10, 11, and by SIFU 2 using fiber-optic communication lines 12, 13, 14, 15, 16, 17, forming a galvanic isolation of the drivers 6, 7, 8 from each other and from the external control apparatus. The findings of the resistors 18, 19, 20 are connected to the drivers 6, 7, 8. The block signals of groups of series-connected thyristor 4 is connected to the Electromechanical trip unit 21 (Fig.2). The method is as follows. In the beginning Converter SETH 2, synchronized with the mains supply, generates a pulse on the firing valve groups, which goes to the block breakers control pulses 3. Since the inception of the signal about the accident coming from the unit of General signal groups of series-connected thyristors 4 is missing, then the keys of the chopper pulses are closed and freely pass signals from SETH to the drivers 6, 7, 8. Upon receipt of the split control pulse to the drivers 6, 7, 8 is the introduction of a fixed delay in unlocking the momentum of each thyristor groups, thereby providing time t required for the control of the thyristors included in the operation and testing of communication lines on the land: the driver - breaker pulse - SETH. Also the driver 6, 7, 8 function control thyristors after recovery to record the surrounding properties on the distribution of reverse voltage and temperature. The block signals of groups of series-connected thyristors 4 operates at two points in time. In the first moment of time when the thyristor is in operation, the signal response from all of the drivers valve group 6, 7, 8 is sent to the block 4, which checks the integrity of the communication lines between the driver transistors 6, 7, 8 and SETH 2. In the case of responses quantitatively equal to n-thyristors group included in the operation unit 4 is not taking any action, and thyristors group is transferred to the conducting state, otherwise, in the absence of one or more confirming responses from drivers thyristors 6, 7, 8 for the time t/2, the block signals of groups of series-connected thyristors 4 outputs a signal to shut off the unit circuit breakers control pulses 3, resulting pulses are supplied to the driver 6, 7, 8 is interrupted and as time delays trigger pulse to the thyristor to this point is not yet released, all the thyristors of the group will not be opened in this and subsequent cycles, the operation of the rectifier will be terminated. The second time, the thyristors finish allow the current to flow in and out of work, for time t, the thyristor must restore the locking properties, then driver 6, 7, 8 provide measurements of reverse voltage distribution for the thyristors of the group, and if the of the faithful, this indicates the health of semiconductor devices in sequential inclusion. Simultaneously with the measurement of the reverse voltage is read the values of the coolant temperature of each thyristor. Overheating of one or more of the thyristors is removing pulses from all valve groups. In case of insufficient value of the reverse voltage on at least one thyristor group, issued a global alarm, and fire all blocks breakers control pulses 3, stopping the flow of impulses to all the thyristors of the Converter. If not the health of two or more thyristors in addition to the above-described effects, the inverter switches off from the network using Electromechanical trip unit 21, preventing avalanche accident progression, implementing selective two-level protection thyristor Converter. Measurement of reverse voltage distribution of the thyristors is performed in every cycle of the thyristor groups. Information on the distribution voltage and the working temperature of the thyristors in block signals of groups of series-connected thyristors 4 accumulated over several cycles of operation. The block 4 has a threshold function and in the case of reducing the reverse voltage or excessive temperature rise on the thyristor causes the algorithm described above, and the accumulated information is used to predict the crash. The prediction function is implemented as follows: if one or more of the thyristors with a lifetime of experience parameter degradation or loss of class, the reverse voltage across the thyristors consecutive groups will decline. When this accumulated statistics about the total stress distribution, taken at several time intervals of work will reflect this change, which indicates a possible deterioration of the characteristics of both RC circuit of the damper and the thyristor with its subsequent breakdown. The proposed solution allows measurement of temperature and reverse voltage to improve diagnostic system properties protection thyristor Converter. In addition, it becomes possible to evaluate the efficiency of the cooling system of the thyristor blocks, as well as to localize places with uneven or inadequate heat dissipation, and save the resource outages Electromechanical breakers with selective two-level protection. 1. The method of protection and diagnostics of series-connected thyristors, in which the protective effects cease the supply of control pulses, wherein monitoring the state of tiree is tori reverse voltage and operating temperature coolers valves, monitor the condition of the communication line system of pulse-phase control feedback response, measure the reverse voltage distribution in each cycle of the valve groups, and when exceeding the maximum permissible temperature of the valves or decrease of the nominal value of reverse voltage distribution, or disconnection system with pulse-phase control produce a protective effect by removing pulses from all of the thyristor groups and disconnection of the inverter from the network, or only removing the control pulses, and by analyzing the measured distributions reverse voltage and operating temperature on the thyristor warn about emergency failure of the thyristor due to degradation of its characteristics. 2. The protection device and diagnostics of series-connected thyristors, comprising an auxiliary power source, the system pulse-phase control connected with block breakers control pulses, the findings of which are connected to the blocks of the common signals of groups of series-connected thyristors, characterized in that the block n of series-connected thyristors with damper RC circuits with individual drivers running on the cathode side, connected by an auxiliary power source using malagarasi who's high-frequency transformers, and from system pulse-phase control using fiber-optic communication lines, the findings of thermistors are connected to the drivers, and the unit of General signal groups of series-connected thyristors is connected to the Electromechanical trip unit.
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