相关技术在并网发电孤岛检测中的应用研究  

APPLIED RESEARCH OF ISLABDING DETECTION GRID-CONNECTED POWER GENERATION ON CORRELATION METHOD

作　　者：陈卫民[1,2] 陈国呈[1] 吴春华[1] 崔开涌[1] 张翼[1] 肖鹏[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海市电站自动化技术重点实验室,上海200072 [2]中国计量学院,杭州310018

出　　处：《太阳能学报》2008年第12期1484-1488,共5页Acta Energiae Solaris Sinica

基　　金：高等学校博士学科点专项科研基金(NO.20060280018);上海市教委重点项目基金(NO.06ZZ03);上海市科委登山计划项目(NO.06DZ12211);上海市重点学科建设项目(NO.T0103);台达电力电子科教发展基金(NO.DRE02006017)

摘　　要：提出一种基于相关技术的主动式孤岛检测方法,该方法引入一个二进制伪随机信号,使 PWM 调制正弦波紧随着该信号做相应变化,从而使输出并网公用连接点(PCC)电压具有优良的自相关特性。当并网时,由于 PCC 点电压受控于电网电压,其自相关函数值很小;当孤岛出现时,其自相关函数值明显变大,根据 PCC 点电压自相关函数值的大小确定孤岛。实验和仿真结果表明,该方法能有效检测出孤岛,且算法简单,易于实现。A novel active islanding detection algorithm based on correlation method was proposed. The modulation sinusoidal waveform was modified by a binary pseudo-random signal （M-sequence signal） so that the voltage of PCC （the point of common coupling） would have correlation properties. In the grid-connected scenario, the voltage of PCC is dominated by voltage of power grid and the correlation function has no remarkable peak; however, once the islanding event takes place, the correlation function of PCC will have a remarkable peak. Therefore, the islanding can be detected by monitoring the peak of the correlation function. The experimental results demonstrate that the method can effectively detect island effect and proposed algorithm is easily realized.

关 键 词：并网 孤岛检测 相关技术 M序列 

分 类 号：TM615[电气工程—电力系统及自动化]