| 基于pq分解的瞬时无功电流与功率分析新方法 |
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| 引用本文： | 刘金华,刘永强. 基于pq分解的瞬时无功电流与功率分析新方法[J]. 电测与仪表, 2009, 46(5) |
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| 作者姓名： | 刘金华 刘永强 |
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| 作者单位： | 1. 电子科技大学中山学院,广东,中山,528403
2. 华南理工大学,电力学院,广州,510640 |
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| 摘 要： | 如何定义三相系统的瞬时无功电流、瞬时无功功率一直是学术界关心的问题.本文从电力系统对无功考核的角度出发,详细讨论了各瞬时电流、瞬时无功功率的特性,将电流分解为p、q轴分量(本文设定电压向量[ua,ub,uc]T落在P轴上),从而得到p、q轴的功率.指出p轴电流除有功电流Ip外还含有瞬时无功电流Ip2,由此指出瞬时无功功率由q轴瞬时无功功率和p轴瞬时无功功率构成.当零序电压不存在时,p轴瞬时无功不存在,q轴瞬时无功表示相间负载交换的功率;若再设零序电流也不存在则此时的瞬时无功就是Akagi定义的瞬时无功功率.
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| 关 键 词： | 瞬时无功功率 瞬时无功电流 三相不对称非正弦系统 谐波 |
A New Instantaneous Reactive Current and Power Analysis Based on pq Decomposing |
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| LIU Jin-hua,LIU Yong-qiang. A New Instantaneous Reactive Current and Power Analysis Based on pq Decomposing[J]. Electrical Measurement & Instrumentation, 2009, 46(5) |
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| Authors: | LIU Jin-hua LIU Yong-qiang |
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| Affiliation: | LIU Jin-hua1,LIU Yong-qiang2(1 Zhongshan Institute of UESTC,Zhongshan 528403,Guangdong,China.2.South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | How to define instantaneous reactive current and reactive power in three-phase non-sinusoidal asymmetrical systems is still a concerned problem by academia.From the view of assessing reactive power in power system,this paper discusses the properties of the instantaneous current and instantaneous reactive power in detail.By decomposing instantaneous current into p-axis and q-axis components(The voltage vector [ua,ub,uc]T is regarded to be located at p-axis),then the corresponding reactive power of p-axis and... |
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| Keywords: | instantaneous reactive power instantaneous reactive current three-phase non-sinusoidal asymmetrical systems harmonics |
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