应用于DSTATCOM的负序电流优先补偿策略  

A Negative Sequence Current Preferred Compensation Strategy Applied in DSTATCOM

作　　者：朱永强 王腾飞 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2012年第8期106-110,共5页Power System Technology

基　　金：中央高校基本科研业务费专项基金项目(12MS33)~~

摘　　要：为了提高配电网静止同步补偿器(distribution-levelstatic reactive compensator,DSTATCOM)补偿负荷的灵活性,提出了一种针对DSTATCOM的电流优化补偿策略,即负序电流优先补偿策略。当DSTATCOM的容量能够补偿全部的负序电流分量却不能补偿全部负荷电流时,该补偿策略能够完全补偿负序分量、保证无功分量的最大程度补偿。在配电网的电能质量治理中,该补偿策略优先保证了系统的三相电压对称性。该策略能够应用于星形或角型拓扑的DSTATCOM中,仿真结果证明了其有效性和准确性。To improve the flexibility of load compensation by distribution-level static reactive compensator （DSTATCOM）, an optimized current compensation strategy for DSTATCOM, namely the negative sequence current preferred compensation strategy, was proposed. Under the condition that the capacity of DSTATCOM was enough to compensate all negative current components but not enough to compensate all of load currents, the proposed compensation strategy could ensure that the negative sequence component was completely compensated and reactive component was compensated in maximum extent, thus in the power quality management of distribution network the symmetry of three phase voltages could be ensured preferentially. The proposed compensation strategy could be applied to star-connected or triangle-connected DSTATCOM, and the effectiveness and accuracy were verified by PSCAD-based simulation results.

关 键 词：配电网静止同步补偿器(DSTATCOM) 不平衡负荷补偿 负序优先 

分 类 号：TM734[电气工程—电力系统及自动化]