Overcurrent tester of TCR

Abstract

The invention relates to a thyristor valve over current testing device that the heavy current power supply to supply heating current to the testing circuit and the resonant tanic supplies over current and the corresponding blocking voltage, and the high voltage circuit assistants to realize the special demand for HVDC valve. By adjusting the combining of different capacitances and reactance of the resonant tanic, the testing current frequency and other current wave parameters would be generated. The second monitoring and adjusting system is made up of plural processing units and realizes collecting and monitoring to plural monitoring parameters through layer type structure. The inside of the system adopts CAN bus to realize data sharing channel and improve the reliability and flexibility of the system.

Description

technical field [0001] The invention relates to a test device for a thyristor valve in a power system and a power electronic system, in particular to a high-power power electronic device thyristor valve overcurrent test device. Background technique [0002] With the development of the national economy, the power industry development strategy of "power transmission from west to east, mutual supply from north to south, and national networking" has been implemented. How to greatly improve the utilization efficiency of power grid resources, overcome the bottleneck of power transmission and distribution, and realize the optimal allocation of power system resources while ensuring the safe and stable operation of the power grid has become a strategic technical problem that needs to be solved urgently. Flexible AC Transmission System (Flexible AC Transmission System, hereinafter referred to as FACTS) and DC transmission (High Voltage Direct Current, hereinafter referred to as HVDC) ...

AI Technical Summary

Problems solved by technology

However, due to various reasons, the overcurrent test devices have some problems of poor equivalence, inflexible adjustment and failure to meet IEC standards:

[0009] Although the test circuit of SIEMENS company can meet the requirements of the two tests, the frequency is fixed when used to test the TSC, and the circuit parameter adjustment is very inconvenient. When the voltage is applied after the overcurrent, the reverse recovery overshoot is not also added to the test. On the product valve, this does not meet the requirements of the IEC standard;

[0010] The test parameters of TOSHIBA's test circuit are low, and the temperature of the test valve will drop quickly when switching with a switch, and the equivalent performance is even worse

[0011] As far as the country is concerned, although this field has great application prospects, it is still blank due to various reasons.

Images