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

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 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 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 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 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 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 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 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.