STATCOM保护系统设计

当STATCOM装置处于异常、紧急及故障等不同状态时，保护系统应采取不同的保护措施。当系统发生故障或大扰动时，装置可能工作于异常状态，此时应采用安全运行区内的正序电流控制。紧急状态下，采用了“封锁脉冲运行方式”。文中对STATCOM的综合保护系统的设计方案进行了分析和描述，其可行性已在实践中得到验证。

DESIGN OF PROTECTION SYSTEM OF STATCOM

When STATCOM is in abnormal,emergent and faulty states,different measures should be taken to protect it.If the faults or large disturbance occur in power systems,the device m ay work under abnorm al conditions. In such a case, adequate control of its positive sequence current within safe operation zone should be adopted.If the device works under emergency conditions,the protective action named GTO driving pulses blocking operation can be taken thus all the GTOs are blocked and the device works just as a rectifier. This paper also gives an overall design of the STATCOM protection system,and the engineering practice of which proves that it is a valid anti- fault m easure for STATCOM in power systems.