±200M var静止同步补偿器的电网电压控制策略  

Grid voltage control of ±200 Mvar STATCOM

作　　者：刘锦宁 刘洋 何伟斌 

机构地区：[1]广东电网有限责任公司东莞供电局,广东东莞523000

出　　处：《电力自动化设备》2015年第5期29-35,共7页Electric Power Automation Equipment

基　　金：'十一五'国家科技支撑计划资助项目(2007BAA-10B02)~~

摘　　要：结合南方电网±200 Mvar链式静止同步补偿器(STATCOM)的应用实践,研究了大容量STATCOM对电网电压的控制策略。基于STATCOM装置的动态无功补偿原理,介绍了STATCOM装置4种控制模式,指出正式运行时仅采用稳态调压和暂态电压控制2种模式,根据目标母线电压自动进行模式识别和切换。介绍了稳态调压控制基本参数的设计,分析了该模式下STATCOM对电网电压的调节范围和效果。通过对电网故障的针对性分析,设计了STATCOM暂态电压控制逻辑,指出近端故障时可进入零无功的主动闭锁状态。对比全日电网电压曲线和STATCOM无功曲线,印证了STATCOM稳态调压模式可跟踪电网电压进行实时调节。分析故障录波数据,验证了STATCOM在电网故障时可在20 ms左右达到90%的最大暂态输出的设计要求。实践证实了所述的STATCOM的电网电压控制策略的可行性和有效性。Combined with the application practice of ＋200 Mvar STATCOM in China Southern Power Grid, the strategy of power grid voltage control by large-capacity STATCOM is studied. Based on the principle of dynamic reactive power compensation,four control modes of STATCOM device are introduced. It is pointed out that,only the steady-state voltage control mode and transient voltage control mode are suitable for the formal operation and the pattern recognition and switchover are automatically carried out according to the voltage of target bus. The basic parameters of steady-state voltage control mode are designed and its voltage regulating range and effect on grid voltage are analyzed. The STATCOM transient voltage control logic is designed based on the specific analysis of power grid faults and it is pointed out that,the active blocking state with zero reactive power can between daily grid voltage curve and STATCOM be entered in case of near-end fault. The comparison reactive power curve confirms that,STATCOM regulates the grid voltage in real time by tracking it in the steady-state voltage control mode. The fault recording wave analysis shows that,STATCOM can send up to 90% of the designed maximum transient reactive power output in about 20 ms. Applications verify the proposed strategy of STATCOM power grid voltage control is feasible and effective.

关 键 词：STATCOM 模式识别 稳态调压控制 暂态电压控制 无功补偿 电压控制 设计 应用效果 

分 类 号：TM762[电气工程—电力系统及自动化] TM714.3