Thyristor valve test system based on cooperation of logical functions of software

A thyristor valve test system based on cooperation of logic functions of software, wherein the test system comprises:

• a tested thyristor valve, a tester and a valve based electronics (VBE), wherein the tested thyristor valve and the VBE are connected via optical fibers, which are used for transmitting a firing pulse (FP) and an indication pulse (IP);
• the tested thyristor valve and the tester are connected via cables, which are used for the tester to apply a test voltage to the tested thyristor valve;
• there is no connection between the VBE and the tester;
• the tested thyristor valve includes at least one thyristor level, the thyristor level at least includes a thyristor, a thyristor control unit (TCU) and an auxiliary circuit;
• the TCU feeds back an IP1 to the VBE when in normal operation, and the value of a return counter is incremented by 1 each time the VBE receives an IP1;
• and the TCU feeds back an IP2 to the VBE when being protective fired, and the value of an auxiliary counter is incremented by 1 each time the VBE receives an IP2;
• VBE is provided with a test mode correspondingly, and in the test mode:
• a. send a FP to the tested thyristor valve and clear the return counter if the VBE receives N consecutive IP1 and the value of an auxiliary counter is 0;
• b. after receiving the IP2, the value of the auxiliary counter is incremented by 1, the VBE does not send FP to the tested thyristor valve when next time receiving N consecutive IP1;
• c. if the VBE does not receive any of the IPs within a certain time T, calculate the number of the IP1 and IP2 from zero by clearing the values of the return counter and the auxiliary counter to 0;
• and
• the tester applies different voltages in different stages according to the test requirements.