非理想电压时一种改进的ip-iq检测法  

An Improved i_p-i_q Detection Method Under the Condition of Non-ideal Voltage

作　　者：吴超[1] 

机构地区：[1]国网浙江省电力公司湖州供电公司,浙江湖州313000

出　　处：《广东电力》2016年第7期72-77,共6页Guangdong Electric Power

摘　　要：传统i_p-i_q法在非理想电压时对补偿指令电流的检测存在误差,且电流运算坐标变换复杂。基于此,在对传统i_p-i_q法分析的基础上,提出了一种适合非理想电网电压的改进i_p-i_q法。该方法利用正余弦信息提取模块取代锁相环,准确地提取其基波正序电压的相位信息,消除了锁相环对检测的影响,并减少了电流运算中的坐标变换与滤波延时。分别在MATLAB/Simulink仿真软件以及配电网静止同步补偿器样机上进行仿真分析和实验验证,结果证实了所提方法的有效性与可行性。There are some errors in detecting compensation command current by traditional ip-iq method under the condition of non-ideal voltage and conversion of current computing coordinate is complicated. In allusion to these problems,this paper presents a kind of improved ip-iq method suitable for non-ideal grid voltage on the basis of analyzing traditional ip-iq meth-od. This method uses sine and cosine information to extract module to replace phase-locked loop so as to correctly extract phase information of fundamental positive sequence voltage,remove impact of phase-locked loop on detection and reduce coordinate conversion and filter delay in current computation. Simulating analysis and experimental verification is conducted in MATLAB/Simulink software and distribution static synchronous compensator （D-STATCOM）prototype and results prove effectiveness and feasibility of the proposed method.

关 键 词：配电网静止同步补偿器 IP-IQ法 非理想电网电压 基波正序电压 

分 类 号：TM761[电气工程—电力系统及自动化]