500 kV线路串联补偿电容器组的接线方式及保护

分析了串补平台接线方式、CT配置对电容器和MOV保护的影响，以及火花间隙保护配置。比较了电容器组1个H形桥和2个H形桥接线，后者较前者可以更快定位故障的电容器；比较了这两种接线的CT配置，配置有电容器总支路CT的接线，可以更好地实现断路器合闸失灵保护，在不平衡保护的整定方面应该区别对待；比较了有分支和无分支MOV接线形式及其CT配置，前者较后者更容易检测故障单元，有分支接线可以更好地实现MOV故障保护。火化间隙应该配置自触发、拒触发、延时触发、持续触发保护，更好实现对一次设备的保护。

Connection mode and protection of 500 kV transmission line series compensation capacitor bank

This paper analyzes how do connection of series compensation and the CT configuration affect the capacitors and MOV protection, and the spark gap protection configuration. Comparing the capacitor of 1 H-shaped bridge connection with that of 2, the latter is faster at locating the fault capacitor. As for the two connections, the one equipped with capacitor circuit branch CT can achieve the protection better when circuit breaker fails. So, it should be treated differently while setting the unbalance protectio...