高压直流输电系统单极闭锁故障下同步调相机与STATCOM的对比研究

当高压直流输电系统送端换流站发生单极闭锁故障时，换流站交流侧将出现无功功率过剩，导致换流站交流侧电压骤升，进一步会引起送端电网各发电设备端电压的骤升。因此，需要在送端交流侧附近加装适当的暂态无功补偿装置以提高系统的稳定性。为此该文先从运行原理、响应特性等多个角度对同步调相机和静止同步补偿器两类暂态无功补偿装置进行分析。然后再对比分析单极闭锁故障下两者在高压直流输电送端系统的应用效果。最后结合单极闭锁故障下切除部分无功补偿装置的措施，得出同步调相机具有更强的暂态无功支撑能力和暂态电压调节能力的结论。

Comparative Study on Synchronous Condenser and Static Synchronous Compensator in High Voltage Direct Current Transmission System under Mono-polar Blocking Fault

When the mono-polar blocking fault occurs at the sending converter of the high voltage direct current (HVDC) trans-mission system, the reactive power of the alternating current (AC) sending system will be surplus, which lead to the swell of the voltage of the AC sending system. For enhancing the stability of sending system, installing appropriate dynamic reactive power compensation equipment will be necessary. For this purpose, the operating principle and response characteristics of synchronous condenser (SC) and static synchronous compensator (STATCOM) have been analyzed firstly. Furthermore, the effect of them applied to the sending side of the HVDC transmission system under mono-polar block fault has been compared. Finally, combining the practical measure of cutting off partial reactive power compensator after the fault, the conclusion which the synchronous condenser has better dynamic reactive power support capability and transient voltage regulation ability has been drawn.