Analysis on Low Voltage Energization Test of the HVDC Converter Valve in 750MW Converter Station

As to low voltage energization test of the HVDC converter valve, no explicit test basis is given in theory although there are some work in China, such as how to determine firing voltage and the firing angle, etc. Research on these issues is carried out in this paper, and experiment results are analyzed by taking low voltage energization test of the HVDC converter valve in LingBao converter station. The technical characteristics of high\|voltage thyristor valve are described in detail, and the functions of DC controlling and protecting system and Valve Base Electronics(VEB) are briefly introduced. In addition, the characteristic of the energy obtaining mode of Thyristor Electronics (TE)are emphatically analyzed. Based on this test, the correctness of connection and compatibility of main loop was verified. The theory basis of low voltage energization test of the HVDC converter valve is also given, which will be the reference for similar test.