24 results about "Integrated gate-commutated thyristor" patented technology

The invention provides a current distribution monitoring assembly of an integrated gate commutated thyristor. The current distribution monitoring assembly comprises two double-D Rogowski coil groups which are arranged in a crossed manner; wherein each D Rogowski coil group is composed of two coils which are wound reversely and connected in series, and the direction of a middle boundary of the two coils of one of the two double-D Rogowski coil groups is consistent with the current direction of the integrated gate commutated thyristor; the two ferrite shielding layers are respectively attached to the lower part of each double-D Rogowski coil assembly; and the Hall effect sensor is arranged on the ferrite shielding layer at the bottommost layer. The current distribution monitoring assembly of the integrated gate commutated thyristor provided by the embodiment of the invention has the advantages of small size, high compactness and wide measurement bandwidth.

The invention discloses a life prediction method and system for an integrated gate commutated thyristor, and is applied to the technical field of integrated gate commutated thyristors, and the method comprises the steps: obtaining the rated working voltage, the rated working temperature and the rated ripple current of a to-be-detected integrated gate commutated thyristor; performing Gall distance processing on the obtained real-time capacitance capacity, real-time voltage data, real-time ripple current and real-time temperature data to obtain a to-be-trained data set; obtaining a voltage correction factor, a temperature correction factor and a current correction factor; inputting the voltage correction factor, the temperature correction factor and the current correction factor into an electrolytic capacitor life estimation relational expression to obtain an electrolytic capacitor life estimation value; and inputting the to-be-trained data set and the electrolytic capacitor life estimation value into the driving life prediction model for processing to obtain life prediction data. According to the method provided by the invention, the problem that the life prediction precision is limited in the prior art can be solved, so that the life of the integrated gate commutated thyristor can be accurately predicted.

The invention provides a performance monitoring assembly of an integrated gate commutated thyristor and a use method thereof, and the corresponding assembly comprises the integrated gate commutated thyristor which is cylindrical; and the spiral segment array consists of a plurality of spiral segments, is uniformly arranged on the circular periphery of the integrated gate commutated thyristor, and is used for determining the current distribution of the integrated gate commutated thyristor so as to monitor the performance of the integrated gate commutated thyristor. The corresponding control method comprises the following steps: monitoring the induced voltage of each spiral section; determining a difference value between the induced voltages of each spiral section; and monitoring the performance of the integrated gate commutated thyristor according to the difference value. According to the method, the distribution condition of the internal current of the integrated gate commutated thyristor can be monitored in real time under the condition that normal operation of the integrated gate commutated thyristor is not interfered, and the health state of the device is evaluated in combination with the aging model.

The invention relates to a bridge arm sub-module, a converter valve module, converter valve equipment and a power distribution system. The bridge arm sub-module comprises a plurality of integrated gate commutated thyristor devices which are connected in series, energy-taking power supplies corresponding to the integrated gate commutated thyristor devices, an anti-parallel unit, a voltage-sharing module and a driving unit, the anti-parallel unit and the voltage-sharing module are connected in parallel to the two sides of the integrated gate commutated thyristor device; the driving unit is connected with the integrated gate commutated thyristor device, and the energy-taking power supply is connected with the driving unit; and the energy-taking power supply is connected with the voltage-sharing module and is used for obtaining electric energy from the voltage-sharing module and supplying power to the driving unit. The bridge arm submodule provided by the invention does not need to be provided with a bypass switch, the long-term reliable short-circuit through-current capability after the IGCT device fails is fully utilized, and the stable operation of a power distribution system is ensured.

The application discloses a kind of active shutdown test equipment, method and system of hybrid commutation converter, and compensation power module includes multiple power modules in series together;Power module includes diode, capacitor and controllable switch;Series capacitor and controllable switch are connected in parallel to the two ends of diode;The diode of multiple power modules is in series together;Test product and first inductive reactor are connected into first branch, and the first end and the second end of first branch are respectively connected the first end of direct current inductance and the first end of capacitor;Test product and second inductive reactor are connected into second branch, and the first end and the second end of second branch are respectively connected the first end of direct current inductance and the second end of capacitor;Test product includes one or more integrated gate commutated thyristor;The second end of direct current inductance is connected to the first end of compensation power module, and the second end of compensation power module is connected to the second end of capacitor.Compensation power module can supplement energy, use inductive resistance value smaller inductance, small volume and low cost.

The invention belongs to the field of high-voltage power transmission and transformation, and discloses a reactive power strong compensation device and method based on IGCT and anti-parallel thyristors, the device comprises at least one group of reactive power strong compensation circuits, and each reactive power strong compensation circuit comprises an IGCT driving module, a thyristor, a charging voltage-sharing module and an energy-taking power supply module; the IGCT driving module and the anti-parallel thyristors work cooperatively to control the conduction and turn-off of forward current and the conduction of reverse current, so that the accuracy and timeliness of switching are ensured; meanwhile, the introduction of the charging voltage-sharing module and the energy-taking power supply module ensures the balance of series voltages at all levels in the dynamic circuit and the stable power supply of the driving module, thereby improving the performance and reliability of the whole device. By adopting the device, faster switching response can be realized, and the switching phase can be accurately controlled, so that the problem of system voltage and current overshoot caused by improper switching phase is avoided.

The invention discloses a test device, method and system for an integrated gate commutated thyristor converter valve. The integrated gate commutated thyristor converter valve at least comprises a first integrated gate commutated thyristor and a second integrated gate commutated thyristor which are connected in series. The charging circuit comprises a first capacitor, a first inductor, a controllable switch and an isolating switch; the charging power supply is connected to the first end of the first capacitor through the isolating switch, the second end of the first capacitor is connected with the second end of the capacitor, and the first end of the first capacitor is connected with the common end of the first integrated gate commutated thyristor and the second integrated gate commutated thyristor through the first inductor and the controllable switch which are connected in series; the charging circuit firstly charges the first capacitor, and then enables the first capacitor and the first inductor to form an oscillation loop to provide charging current for the converter valve. The current source circuit provides alternating current and direct current superposed current for the common end. The test equipment can simulate the short-circuit failure process of overvoltage breakdown of the IGCT converter valve.

The invention provides a junction temperature determination method and device for an integrated gate commutated thyristor. The junction temperature determination method for the integrated gate commutated thyristor comprises the following steps: establishing a junction temperature model according to historical gate-cathode voltage, historical anode current and corresponding temperature of the integrated gate commutated thyristor; and determining the junction temperature of the integrated gate commutated thyristor according to the junction temperature model, the current gate-cathode voltage of the integrated gate commutated thyristor and the current historical anode current. The invention provides a method for extracting the accurate junction temperature during the IGCT conduction period by measuring the gate-cathode voltage of the IGCT and the anode current of the IGCT. The gate-cathode voltage drop can be measured directly from the IGCT gate unit without any external measurement device and power supply.

The invention discloses a method and a system for verifying a valve tester with a reverse blocking type IGCT driving function, and relates to the technical field of direct current transmission, in the method, a valve control host detects, drives and upwards sends an IGCT forward voltage signal, delays a test mode, divides the valve tester through multiple rounds of statistical stages and trigger stages, and counts the forward voltage signal, and the valve tester is connected with the valve control host. And verification of various test functions is realized. The invention discloses a method and a system for verifying a valve tester with a reverse blocking type IGCT (integrated gate commutated thyristor) drive function, aiming at the characteristics that the IGCT drive is relatively long in energy taking time and cannot be automatically turned off, the effects of synchronizing a test starting moment, identifying a test item and matching a control time sequence under the condition that the valve tester is not in direct communication with a valve control host or the IGCT drive are realized. And the test requirement of comprehensive testing of the reverse blocking type IGCT driving performance is met.

The invention provides an IGCT (integrated gate commutated thyristor) converter valve assembly, which comprises a plurality of integrated gate commutated thyristors arranged at intervals along a first direction; the plurality of first heat dissipation pieces are arranged at intervals, an integrated gate commutated thyristor is arranged between every two adjacent first heat dissipation pieces in an attached mode, and the first heat dissipation pieces are in conductive fit with the integrated gate commutated thyristors; a plurality of lightning arresters, wherein the plurality of lightning arresters and the plurality of integrated gate commutated thyristors are arranged at intervals along a second direction; a lightning arrester is arranged between every two adjacent second heat dissipation pieces in an attached mode, and the second heat dissipation pieces are in conductive fit with the lightning arresters; the press-fitting assembly is used for pressing the plurality of lightning arresters and the plurality of second heat dissipation pieces; and the conducting bars are used for conductively connecting the first heat dissipation piece with the second heat dissipation piece. According to the invention, the problem that the continuous active turn-off operation capability of the IGCT converter valve is poor due to the lightning arrester in the related technology is solved.

The invention discloses a hybrid commutation converter valve tester based on IGCT, and relates to the technical field of testers, and the technical scheme is characterized in that the hybrid commutation converter valve tester comprises a programmable excitation source module used for generating and outputting a test electric signal; wherein the electric signals comprise a low-voltage alternating current signal, a high-voltage direct current signal and a high-voltage impact signal; the signal acquisition module comprises a main current measurement unit used for measuring the total current of a test loop and at least two branch current measurement units used for measuring the branch current of the hybrid commutation converter valve. The control module is electrically connected with the programmable excitation source module and the signal acquisition module, and the control module controls the programmable excitation source module to output electric signals according to a preset test sequence; the current signal processing module is used for receiving and processing the current signal from the signal acquisition module, and calculating the leakage current of the integrated gate commutated thyristor based on the Kirchhoff's current law; the effect is that the safety of test equipment is protected.

The utility model provides an energy taking system suitable for an IGCT (integrated gate commutated thyristor) and power electronic equipment. The energy taking system comprises an IGCT device; the RC damping circuit is connected with the anode of the IGCT device; the CT circuit is connected with the cathode of the IGCT device; the bidirectional energy taking circuit comprises an energy taking structure and a bidirectional controllable switch; when the bidirectional controllable switch is turned off or turned on, the RC damping circuit or the CT circuit charges the energy taking structure or stops charging the energy taking structure. The problems that in the prior art, an IGCT device is insufficient in energy supply in the whole operation period, a traditional energy taking circuit is low in energy taking efficiency, and the energy requirements of IGCT high-frequency on-off and hard driving cannot be met are solved.

The invention discloses an on-line state monitoring device and method of an IGCT device and a flexible direct current converter valve. The on-line state monitoring device of the IGCT device comprises a conduction voltage drop monitoring module, an off-state current monitoring module, an on-off delay time monitoring module, a voltage change rate monitoring module, a current change rate monitoring module, a turn-off voltage peak monitoring module, an electrical quantity acquisition module and a control panel. The electrical quantity acquisition module is connected with the IGCT device, and the on voltage drop monitoring module, the off-state current monitoring module, the on and off delay time monitoring module, the voltage change rate monitoring module, the current change rate monitoring module and the off voltage peak monitoring module are respectively connected with the electrical quantity acquisition module and the control panel. According to the technical scheme, online monitoring of the state of the IGCT device can be achieved, the accuracy of health state evaluation of the IGCT device is improved, and then the safety of the IGCT device is improved.

The invention relates to a high-efficiency electromagnetic transient modeling method for a hybrid high-voltage direct-current power transmission system containing an IGCT (integrated gate commutation current transformer), and belongs to the field of electric digital data processing. The IGCT high-voltage direct-current power transmission system comprises a power grid commutation current transformer at a sending end, an IGCT current transformer at a receiving end and a direct-current power transmission line between the power grid commutation current transformer and the IGCT current transformer; the efficient electromagnetic transient modeling method comprises the following steps: at a power grid commutation current converter at a sending end, simplifying the switching operation of a thyristor into a port voltage and current average value model by adopting an averaging modeling method, thereby improving the simulation efficiency of the current converter at the sending end; a Thevenin equivalent method is adopted at the IGCT current converter of the receiving end, and an IGCT switch is dynamically simplified into a Norton equivalent circuit model of a current source and impedance, so that the simulation efficiency of the current converter of the receiving end is improved; for a direct current transmission line between transmitting and receiving end converter stations, a Bergeron model is adopted to decouple the two ends of the whole line, so that the electrical response of the two ends can be processed independently, the complexity of mutual coupling of the two ends of the line is reduced, and the calculation process is simplified.

The invention belongs to the technical field of flexible direct current transmission, and discloses an energy consumption duration control method of an IGCT energy consumption device and related equipment, and the method comprises the steps: monitoring the working states of the IGCT energy consumption device in real time, specifically, an energy consumption input state, an energy consumption short-time quit state and an energy consumption quit state; and the accumulated energy consumption state duration is counted by adopting a sliding window algorithm in a preset sliding window period, specifically, the total duration of the energy consumption input state and the energy consumption short-time quit state in the sliding window is counted, and the control device is immediately converted into the energy consumption quit state until the accumulated duration reaches the preset maximum energy consumption duration or meets the quit condition. By adopting the method, overheating damage of the device is effectively prevented, the operation reliability of the device is improved, intelligent energy consumption control is realized, and the problem of heat accumulation can be solved without depending on external heat dissipation measures.

The utility model relates to a high-voltage wide-range IGCT (integrated gate commutated thyristor) anode voltage detection module, and aims to solve the problems that simultaneous detection is difficult to realize, the circuit is complicated, the cost and the unreliability are greatly increased, the real-time performance is poor, the timeliness of signal protection action is reduced, devices are easy to damage, and the measurement result is difficult to keep accurate in the prior art. The device comprises a high-voltage detection resistor, an electronic switch module, a high-voltage detection module, a low-voltage detection module, a negative-voltage detection module, a zero-crossing synchronous detection module, a logic judgment module, an optical fiber transceiver module and an IGCT switching-on and switching-off current generation module. The circuit is simple, the state of the IGCT anode voltage can be simply and accurately detected, and the use reliability and use flexibility of the IGCT in a power system are improved.

The invention discloses a full-control type converter valve module, a full-control type static frequency converter, a system and a control method, and relates to the technical field of pumped storage. Each sub-bridge arm comprises at least one integrated gate commutated thyristor unit; the integrated gate commutation thyristor unit comprises an integrated gate commutation thyristor, a dynamic voltage-sharing branch circuit used for AC voltage sharing, a static voltage-sharing branch circuit used for DC voltage sharing, and an integrated controller used for controlling on or off of the integrated gate commutation thyristor. Wherein the anode of the integrated gate commutated thyristor is respectively connected with one end of the dynamic voltage-sharing branch and one end of the static voltage-sharing branch, the other end of the dynamic voltage-sharing branch is connected with the integrated controller, and the cathode of the integrated gate commutated thyristor is respectively connected with the other end of the static voltage-sharing branch and the integrated controller. The problem of small-angle commutation failure of the converter valve can be solved.

The invention discloses test equipment for a converter valve sub-module. The test equipment comprises an oscillation current circuit and an attenuation current circuit, the first end of the capacitor is connected with the first end of the first reactor, the second end of the first reactor is connected with the first end of the first switching device, the second end of the first switching device is connected with the first end of the second reactor, and the second end of the second reactor is connected with the second end of the test converter valve. The first end of the third switching device is connected with the first end of the test converter valve, and the second end of the third switching device is connected with the first end of the second reactor; the second switching device and the first switching device are connected in parallel, and the first switching device and the second switching device form a bidirectional switching device; the test converter valve comprises a plurality of integrated gate commutated thyristor converter valves which are connected in series; the oscillating current circuit is used for forming oscillating current; and the attenuation current circuit is used for forming attenuation current. The test equipment can simulate the short-circuit fault current of the converter valve in a high-equivalent manner.

The invention discloses a short-circuit current test device for a large current generation module and a turn-off device, which is particularly suitable for testing high-performance power electronic devices such as an insulated gate bipolar transistor (IGBT), an integrated gate commutated thyristor (IGCT) and the like. The test device integrates a large current generation module based on a direct current support capacitor bank, a reactor, a control device formed by an auxiliary valve bank, a measuring device and other parts, and aims to accurately control the performance of a power electronic product in a short-circuit current test and meet the test requirements of a high-voltage large-power device. The device provides a comprehensive test platform for the function and performance test of the turn-off devices, and provides solid technical support for the application of the devices in a power grid.

The invention discloses an IGCT (integrated gate commutated thyristor) driving circuit and an IGCT gate voltage clamping method. The IGCT driving circuit comprises a driving signal input module which is used for receiving an external input original driving signal; the driving amplification module is used for amplifying the original driving signal; the gate pole driving loop is used for transmitting the amplified driving signal to the gate pole of the IGCT device; the gate voltage clamping protection module comprises a voltage clamping diode and an RC network, and the voltage clamping diode is used for clamping the gate voltage when the gate voltage exceeds a preset threshold value; the RC network is used for stabilizing the gate voltage when the voltage clamping diode is not conducted; and the driving signal isolation element is used for electrical isolation between the driving amplification module and the gate pole of the IGCT device. The technical problem that the gate pole of the IGCT device is easily damaged by over-high voltage under the condition of high-current turn-off or electromagnetic interference in the prior art is solved.

The invention relates to the field of semiconductors, provides an integrated gate commutated thyristor and a preparation method thereof, and at least can solve the problems of turn-off softening, overshoot control, process window and high-temperature stability. The preparation method comprises: providing a substrate; forming an initial buffer layer, wherein the initial buffer layer is located on the substrate; hydrogen injection processes are carried out on the initial buffer layer to obtain a buffer layer precursor, the hydrogen injection processes at least comprise a first hydrogen injection process, a second hydrogen injection process and a third hydrogen injection process which are continuous, and first energy of the first hydrogen injection process, second energy of the second hydrogen injection process and third energy of the third hydrogen injection process are different; and / or the first dosage of the first hydrogen injection process, the second dosage of the second hydrogen injection process and the third dosage of the third hydrogen injection process are different; the buffer layer precursor is subjected to an annealing process to obtain the hydrogen buffer layer, the temperature range of the annealing process is 350-500 DEG C, and no endpoint value is included.

The invention discloses a current converter, a control method and a related product. The converter comprises a bridge arm circuit of a hybrid commutation converter valve and a controller. Wherein the hybrid commutation converter valve comprises an integrated gate commutation thyristor; the controller is configured to obtain the alternating current side voltage of the bridge arm circuit; under the condition that the fluctuation value of the alternating current side voltage is located in a preset fluctuation interval, the extinction angle of the hybrid commutation converter valve is adjusted according to the fluctuation value in a preset extinction angle interval, and the extinction angle and the fluctuation value are in a positive correlation relationship; wherein the fluctuation value is an absolute difference value between the alternating current side voltage and the voltage reference value. The extinction angle of the hybrid commutation converter valve is adjusted according to the fluctuation value, the influence of disturbance on the turn-off margin of the hybrid commutation converter valve is reduced, and the operation stability of the hybrid commutation converter valve is further improved.

The invention relates to the technical field of power transmission systems, and provides a power transmission control method, a power transmission control system, power transmission control equipment and a medium for a series-parallel converter valve topology. According to the total number of single-bridge-arm sub-modules and the use proportion of IGCT sub-modules in the series-parallel converter valve topology, the number of real-time input sub-modules of an upper bridge arm and the number of real-time input sub-modules of a lower bridge arm in the series-parallel converter valve topology are calculated on the basis of the nearest level approximation modulation principle, wherein the total number of single-bridge-arm sub-modules and the use proportion of IGCT sub-modules are adopted in main wiring of the series-parallel converter valve topology; and executing power transmission control according to the number of the upper bridge arm real-time input sub-modules and the number of the lower bridge arm real-time input sub-modules. According to the invention, the advantage complementation of the insulated gate bipolar transistor and the integrated gate commutated thyristor can be realized based on the flexible matching of the IGBT sub-module and the IGCT sub-module, the DC power transmission performance of a power transmission system can be ensured, and the construction cost of a flexible DC converter station can be greatly reduced.

The embodiment of the invention provides a network construction type current source inverter circuit, a control method and related equipment, and belongs to the technical field of power grid connection. According to the scheme, the network-forming type current source inverter circuit comprises a DSP (Digital Signal Processor) chip and a current source inverter integrated with an integrated gate commutated thyristor, the DSP chip is used for generating a control signal for driving the current source inverter; the current source inverter is integrated with an integrated gate commutation thyristor, the integrated gate commutation thyristor is connected with a DSP chip, and the DSP chip controls the on-off of the current source inverter through the integrated gate commutation thyristor. According to the embodiment of the invention, the integrated gate commutated thyristor is used as a switching tube of the PWM control current source type grid-forming inverter, and the integrated gate commutated thyristor has the characteristics of high rated voltage and large rated current, so that the number of power devices can be reduced compared with other technologies.