基于综合阻抗序分量的孤岛检测新方法  

A novel detection method for isolated island based on integrated impedance sequence component

作　　者：高淑萍[1] 汪凯昌 贠保记 宋国兵[3] 罗娟[1] GAO Shuping;WANG Kaichang;YUN Baoji;SONG Guobing;LUO Juan(School of Electrical and Control Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;Xi'an Xirui Engineering Technology Limited Company ,Xi'an 710018,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054 [2]西安西瑞控制技术股份有限公司,陕西西安710018 [3]西安交通大学电气工程学院,陕西西安710049

出　　处：《电气应用》2019年第4期42-47,共6页Electrotechnical Application

基　　金：陕西省自然科学基础研究计划-面上项目(No.2017JM5138)

摘　　要：由于传统被动式孤岛检测方法存在较大盲区,而主动孤岛检测方法对电能质量有一定影响,针对此问题,提出了一种基于综合序阻抗的孤岛检测新方法。该方法将传统阻抗方法中的突变量改为逆变器并网点的综合阻抗序分量,检测PCC点处综合阻抗序分量的变化,当其值超过限定范围时,判定为发生孤岛现象。最后,利用PSCAD搭建单PV光伏并网发电逆变器系统模型,基于该模型,获得仿真数据,然后利用Matlab对仿真数据进行处理,对所提孤岛算法进行仿真验证,仿真结果表明了理论推导的正确性及所提出孤岛检测方法的有效性。Aiming at the large blind area of traditional passive island detection method, active island detection method has a certain impact on power quality. A new method of island detection based on integrated sequential impedance is proposed. In this method, the abrupt change in the traditional impedance method is changed into the integrated impedance sequence component of the parallel node of the inverter, and the variation of the integrated impedance sequence component at the PCC is detected. When the value exceeds the limited range, the phenomenon of isolated island occurs. Finally, a single PV grid-connected PV power inverter system model is built in PSCAD. Based on this model, the simulation data can be obtained. Then, the simulation data is processed in Matlab , and the proposed algorithm was verified. The simulation results show that the theoretical derivation is correct and the proposed method is effective.

关 键 词：光伏发电 孤岛检测 综合阻抗 序分量 

分 类 号：TM464[电气工程—电器] TM615