Loss analysis of TCR valve under high voltage test mode

The circuit topology and working principle of thyristor controlled reactor (TCR) valve under high voltage test mode are analyzed in detail. The detailed definitions of various losses emerged during the high voltage test for TCR valve are conducted by means of classification of them and the calculation formulae for different losses are given. On this basis and according to the working sequence of TCR valve under high voltage test mode, the total energy loss of the tested valve and that of the auxiliary valve, while they are cutovered once respectively, are analyzed. Compared the analysis results of the test with those by EMTDC simulation for same calculation example, it is shown that the loss analysis result of TCR valve under high voltage test mode by the proposed loss analysis method is more accurate and overall than that from PSCAD/EMTDC simulation.