基于扇合矢量法的基波负序电流检测及其应用  

Detection and Application of Fundamental Negative Sequence Current Based on Fan Vector Method

作　　者：黄辉先[1] 许逵 丁灿 刘嘉婷 HUANG Hui-xian;XU Kui;DING Can;LIU Jia-ting(Xiangtan University College of Information Engineering,Xiangtan,Hunan 411105,China)

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105

出　　处：《计算技术与自动化》2018年第1期47-50,共4页Computing Technology and Automation

基　　金：湖南省教育厅重点资助项目(12A136)

摘　　要：在低压配电网中,快速准确地基波负序电流检测对于电能质量控制和继电保护都非常重要,针对传统的基于瞬时无功功率理论的ip-iq和FBD检测方法通过采用锁相环、低通滤波器来实现存在增加算法的复杂度和导致一定的延时等问题。提出了一种新型检测方法。首先通过扇合矢量法,进行矩阵变换,将三相系统的电压和电流归一化为单相系统;然后通过构造改进的正弦幅值积分器,滤除高次正、负、零序电流成分,通过简单的数学运算,实现对基波负序电流的快速提取。该方法具有较强的抗干扰能力和频率自适应性,仿真与实验结果验证了所提方法在有源电力滤波器应用方面具有良好的补偿性能。In low voltage distribution network,fast and accurate detection of fundamental negative sequence current is very important for power quality control and relay protection,Traditional methods based on the instantaneous reactive power theory and FBD by using phase-locked loop,low-pass filter and the coordinate transformation,which will increase the complexity of the algorithm and delay time accordingly.For this reason,a new detection method is proposed.Using the fan in vector method and matrix transform,three-phase voltage and current of the system will transfer to single-phase system;then constructing sinusoidal amplitude integrator extract positive and negative,zero sequence current.Through simple mathematical operations,the fundamental negative sequence current was obtained quickly.The proposed method has strong anti-interference ability and frequency self adaptation.The simulation and experimental results show that the proposed method has good compensation performance.

关 键 词：基波负序电流 扇合矢量 矩阵变换 正弦幅值积分器 

分 类 号：TM712[电气工程—电力系统及自动化]