逆变型电源接入对选相元件的影响分析  

Influence of Inverter-interfaced Generator on Element of Phase Selectors

作　　者：陈实[1] 邰能灵[1] 范春菊[1] 刘剑[1] 洪树斌 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200240

出　　处：《电力系统自动化》2017年第12期106-112,187,共8页Automation of Electric Power Systems

基　　金：教育部科学技术研究项目(113023A);国家电网公司科技项目(SGTJDK00DWJS1500098)~~

摘　　要：大规模逆变型电源并网故障情况下采取正序分量控制策略,仅输出正序电流,导致逆变型电源侧正、负序电流分配系数严重不相等。从故障序阻抗特性出发,对含大规模逆变型电源送出线路基于传统相电流差突变量幅值关系和序电流故障分量间相位关系的选相元件动作特性进行分析。逆变型电源侧选相元件不能正确选相;系统侧选相元件动作性能受逆变型电源接入影响较少,基于PSCAD的仿真结果验证了理论分析的正确性。最后,对可能应用于含大规模逆变型电源接入的联络线选相元件判据进行了展望。The positive-sequence control strategy is adopted for the integration of large-scale use of inverter-interfaced generators（IIGs）under fault conditions,and the fault current supplied by IIGs only consists of positive-sequence components.Such being the case,the positive-and negative-sequence current distribution coefficients on the IIG side are no longer equal any more.Based on this fault characteristic,the performance of the two traditional phase selectors for transmission lines emanating from IIGs,e.g.,the phase selector of the sudden-change of two-phase current difference and the phase selector of the phase comparison of symmetrical components,are analyzed.The phase selectors on the IIG side fail to operate,whereas those on the system side can still make correct decisions.Simulation results based on PSCAD validate the effectiveness of the analysis.Finally,prospective phase selector criterion for systems containing IIGs is proposed.

关 键 词：逆变型电源 故障分析 低电压穿越控制 选相元件 

分 类 号：TM732[电气工程—电力系统及自动化] TM77