改进i_p-i_q电流检测方法研究  

Research on improving i_p-i_q current detection method

作　　者：胥良 刘晓霖 于雁南 李鹏权 XU Liang;LIU Xiaolin;YU Yannan;LI Pengquan(School of Electrical and Control Engineering,Heilongjiang University of Science andTechnology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院

出　　处：《黑龙江电力》2019年第5期387-391,共5页Heilongjiang Electric Power

基　　金：黑龙江省青年科学基金项目(项目编号:QC2017063)

摘　　要：针对传统ip-iq无功电流检测方法在三相电压不平衡情况下精度低、实时性差等问题,提出采用积分滤波器替代低通滤波器(LPF)的方法进行优化。利用Matlab/Simulink搭建仿真模型,分析两种方法检测到的谐波畸变率(THD)。结果表明,改进的ip-iq无功电流检测法检测到的THD值比传统ip-iq电流检测法得到的THD值低1%左右,提高了检测的准确性,同时改进检测法比传统检测法检测出波形的时间提前了0.001 s,在迟滞问题上也得到了优化,提高了检测的实时性。In view of the problems of low accuracy and poor real-time performance of the traditional ip-iq reactive current detection method under the condition of unbalanced three-phase voltage,an integral filter is proposed to replace the low pass filter(LPF)for optimization.Matlab/Simulink is used to build the simulation model and analyze the total harmonic distortion(THD)detected by the two methods.The results show that the THD value of detected by the improved ip-iq reactive current detection method is about 1%lower than that obtained by the traditional ip-iq current detection method,which improves the accuracy of the detection.Meanwhile,the improved detection method can detect the waveform 0.001s earlier than the traditional detection method,and is optimized on the hysteresis problem,and improves the real-time detection performance.

关 键 词：ip-iq电流检测法 低通滤波器 积分滤波器 谐波畸变率 

分 类 号：TM731[电气工程—电力系统及自动化] TN713.4[电子电信—电路与系统]