单相整流负荷谐波功率需求建模分析  

Modeling and analysis for harmonic power demand of single-phase rectification loads

作　　者：张航[1] 毛欣[1] 王佳佳[2] 魏能峤[2] 周念成[2] 

机构地区：[1]国网重庆市电力公司永川供电分公司,重庆400044 [2]输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电力系统保护与控制》2015年第20期8-14,共7页Power System Protection and Control

基　　金：国家高技术研究发展计划(863计划)(2011AA 05A107)~~

摘　　要：单相整流负荷作为典型的谐波源会对电网产生谐波污染,引起附加的谐波功率损耗。基于单相整流负荷工作原理,分析其各次谐波有功和无功功率流向特点,分别建立单相不控和相控整流负荷的功率需求模型。该模型计及整流器端电压和电流各次谐波分量之间的耦合关系,实现了整流负荷谐波功率的精确计算。利用仿真分析验证了该模型推导的正确性,并进一步定义了谐波有功和无功功率导纳矩阵。通过分析矩阵元素物理意义和幅值变化规律,确定单相整流负荷端电压各谐波分量对谐波功率的贡献程度。As a typical harmonic source, the single-phase rectification loads will produce harmonic pollution into power grid, which will further cause the harmonic power loss. Based on the operation principle of the single-phase rectification loads, their harmonic active and reactive powers and the flow direction are investigated. In consideration of the coupled relationship between the terminal current and voltage harmonics of rectifiers, their power demand models are established to calculate the harmonic power accurately. The correctness of the model is verified by the simulation. On this basis, the admittance matrices of harmonic active and reactive power are defined. And the contribution degree that the voltage harmonics of single-phase rectification loads act on their harmonic powers is studied through the analysis of the physical significance and the elements of admittance matrices.

关 键 词：整流负荷 谐波耦合 功率需求模型 导纳矩阵 单相 

分 类 号：TM711[电气工程—电力系统及自动化]