Adjusting for the unblance of capacitor banks with H-bridge connection of power filter on UHVDC converter station

A method for adjusting the unbalance of the capacitor banks with H-bridge connection of the power filter on UHVDC converter station in this paper. Firstly, the concept of unbalance degree is proposed, and the expression of the unbalance degree is deduced, then the new method for adjusting the unbalance of the capacitor bank with H-bridge connection is put forward. The detection method is adopted to detect and adjust the unbalance of the capacitor with H-bridge connection. The test result shows that the proposed method could improve the work efficiency greatly, and the method is suitable for field commissioning test in UHVDC converter station.