电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
Power System Protection and Control
2015年
20期
8-14
,共7页
张航%毛欣%王佳佳%魏能峤%周念成
張航%毛訢%王佳佳%魏能嶠%週唸成
장항%모흔%왕가가%위능교%주념성
整流负荷%谐波耦合%功率需求模型%导纳矩阵%单相
整流負荷%諧波耦閤%功率需求模型%導納矩陣%單相
정류부하%해파우합%공솔수구모형%도납구진%단상
rectification loads%harmonic coupled%power demand model%admittance matrix%single phase
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.
單相整流負荷作為典型的諧波源會對電網產生諧波汙染,引起附加的諧波功率損耗.基于單相整流負荷工作原理,分析其各次諧波有功和無功功率流嚮特點,分彆建立單相不控和相控整流負荷的功率需求模型.該模型計及整流器耑電壓和電流各次諧波分量之間的耦閤關繫,實現瞭整流負荷諧波功率的精確計算.利用倣真分析驗證瞭該模型推導的正確性,併進一步定義瞭諧波有功和無功功率導納矩陣.通過分析矩陣元素物理意義和幅值變化規律,確定單相整流負荷耑電壓各諧波分量對諧波功率的貢獻程度.
단상정류부하작위전형적해파원회대전망산생해파오염,인기부가적해파공솔손모.기우단상정류부하공작원리,분석기각차해파유공화무공공솔류향특점,분별건립단상불공화상공정류부하적공솔수구모형.해모형계급정류기단전압화전류각차해파분량지간적우합관계,실현료정류부하해파공솔적정학계산.이용방진분석험증료해모형추도적정학성,병진일보정의료해파유공화무공공솔도납구진.통과분석구진원소물리의의화폭치변화규률,학정단상정류부하단전압각해파분량대해파공솔적공헌정도.
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. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2011AA05A107).