Survey on automatic tracking compensation arc suppression system

ZHAO Xiao-dong， HUANG Xiao-bin
（Institute of Information and Control， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract：Aiming at the system cannot quickly and accurately compensate for single - phase grounding capacitor current effectively when the power grid grounding fault occurs，the neutral point voltage and compensation principles were studied. Through the use of neutral point via arc-suppression coil grounding mode，the automatic tracking compensation arc-suppression system was established and automatic tuning principle was proposed. The system was mainly composed of arc suppression coil and control system，when single-phase grounding fault occurs，it automatically into the compensation condition，the grounding fault is eliminated，it automatically exit the compensation state. Tuning principle is a key technology of automatic tracking compensation system and the compensation speed and accuracy of system were largely affected by it. After several kinds of tuning principle commonly used at home and abroad were summarized and compared，their advantages and disadvantages and application scope were pointed out. The results indicate that tuning principle applies to the suppression coil with different structures are also different，choosing the appropriate tuning principle can rapidly and effectively compensate the grounding capacitor current.
Key words： neutral point； arc-suppression coil； automatic tracking compensation； automatic tuning