装备电力系统谐波性负荷建模中的电流检测方法  

On study of current detection of harmonic load modeling for equipment power system

作　　者：尹志勇[1] 陈永光[2] 刘正春[1] 黄欣[1] 

机构地区：[1]军械工程学院车辆与电气工程系,河北石家庄050003 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《河北工业大学学报》2015年第1期28-32,39,共6页Journal of Hebei University of Technology

基　　金：国家自然科学基金(51307184)

摘　　要：配有大量非线性元件的装备电力系统多为独立供电的三相四线制系统,且具有更大的内阻.为满足其电流快速准确检测在非线性谐波性负荷建模中的要求,提出一种基于同步坐标变换的装备负荷建模电流谐波检测id-iq-i0方法,能准确检测出供电系统母线电流中与基波正序分量相同步的有功和无功电流,进一步计算负荷的谐波指令电流.通过阐明基于同步坐标变换的检测算法原理与电流处理流程,以建模仿真手段分析变换坐标系后的电流特性,并指出其变换实质.最后,利用该检测方法建立的负荷模型对实际装备电力系统测试参数进行仿真试验,通过波形、总体谐波畸变率及各次谐波含量的分析比较,验证该方法的有效性.The equipment power system with a large number of nonlinear devices has larger internal resistance, and the application objects of the model face to the three-phase four-wire independent power supply system. Therefore, for meeting the requirement of current fast and exact detection in harmonic load modeling, this paper presents a kind of id-iq-i0 method based on synchronous reference transform of current harmonic wave detection, which can carry out the detection of the active and reactive currents of fundamental positive sequence factor synchronization in supply power bus currents in order to further calculate the harmonic instruction current. The detection theory and current transform flow are highlighted in this paper. Through the model simulation, the current characteristic using the synchronous reference transform is analyzed,and the transform essence is pointed out. Finally, the load model based on the current detection method simulates the real equipment power system, and the validity of the method is proved by the comparisons results of current waveform, THD,and single harmonic content.

关 键 词：装备电力系统 负荷建模 电流谐波检测 同步坐标变换 id-iq-i0方法 

分 类 号：TM714[电气工程—电力系统及自动化]