瞬时无功功率理论在配电网电能质量控制中的应用  

Application of instantaneous reactive power theory in power quality control of distribution network

作　　者：武小梅[1,2] 栗颂东 文福拴[2] 

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]华南理工大学电力学院,广东广州510641 [3]葫芦岛供电公司,辽宁葫芦岛125000

出　　处：《电力系统保护与控制》2009年第10期79-82,共4页Power System Protection and Control

基　　金：广东省教育厅专项重点实验室(IDSYS200701)

摘　　要：随着电力电子设备使用的增长,电力系统中的谐波污染越来越严重,有源电力滤波器被认为是改善谐波污染、提高电能质量的有效方法。提出了一种基于并联型有源电力滤波器改善配电网电能质量的控制策略。首先阐述了三相四线制配电网中补偿的原理;然后运用瞬时无功功率理论的ip?iq法进行谐波电流的检测;最后采用改进了的三角波脉宽调制进行补偿电流的控制。利用Matlab软件作为仿真平台,仿真实验证明了所提出控制策略的有效性。With the increment of using power electronic instruments, the harmonic pollution in power system becomes more and more serious. Active power filter is considered as an effective appliance to improve harmonics and power quality. This paper proposes a control strategy to improve the power quality of distribution circuits by using shunt active power filter. First, in a three-phase four-line distribution system, the compensating principle is described. Next, the ip - iq method in instantaneous reactive power theory is used to detect the harmonic currents. Finally, the corrected triangular pulse width modulation is used to control the compensated currents. By using Matlab as the simulation tool, simulation of a practical case shows the efficiency of the proposed control strategy.

关 键 词：配电网 电能质量 有源滤波 瞬时无功理论 脉宽调制 

分 类 号：TM76[电气工程—电力系统及自动化]