CAJ | 학술논문

在超高压输电线路系统中，串联电容补偿具有提高输送容量和改善系统稳定性等优点，但由于串补电容的存在导致输电线路继电保护存在一系列问题。根据串补电容对距离保护和零序方向保护影响的理论分析，提出了基于 TCSC串补电容的线路微机保护算法。算法利用TCSC的运行参数，考虑了串补电容在暂态过程以及电容运行状态对保护参数整定的影响，以避免TCSC使保护拒动或误动。最后通过仿真运行表明，该算法对于带有不同运行状态的TCSC的输电线路有很强的适应力和可靠性，可以满足线路继电保护的基本要求。
재초고압수전선로계통중，천련전용보상구유제고수송용량화개선계통은정성등우점，단유우천보전용적존재도치수전선로계전보호존재일계렬문제。근거천보전용대거리보호화령서방향보호영향적이론분석，제출료기우 TCSC천보전용적선로미궤보호산법。산법이용TCSC적운행삼수，고필료천보전용재잠태과정이급전용운행상태대보호삼수정정적영향，이피면TCSC사보호거동혹오동。최후통과방진운행표명，해산법대우대유불동운행상태적TCSC적수전선로유흔강적괄응력화가고성，가이만족선로계전보호적기본요구。
In ultra high voltage transmission system, series compensated capacitor has many advantages such as enhancing the transmission capacity and improving the stability of power system. But series compensated capacitor also generates many problems in protective relaying of transmission lines. In this paper, according to the theoretical analysis of the distance protection and zero-sequence direction protection affected by series capacitor, it is presented that a microprocessor-based protection algorithm based on TCSC capacitor. The algorithm uses the operation parameters of TCSC, which considers the effect of the transient process of series compensated capacitor and the state of capacitor operation to protection parameters setting. So it can avoid protective relaying rejection or malfunction. At last the results of computer simulation confirm that this algorithm has high adaptability and reliability in different TCSC operation, which can satisfy the basic requirements of protective relaying.