英语翻译I.INTRODUCTIONSolving the problem of a harmonic sources

英语翻译
I.INTRODUCTION
Solving the problem of a harmonic sources localization means solving the problem of responsibility for a harmonic generation,what is very essential from the view-point of disputes between suppliers and customers regarding harmonic distortion.There are many methods for localization of harmonic sources [1] - [10].In the previous papers of the author the methods utilizing the specially-defined rates for a harmonic source localization have been proposed [9],[10].The mentioned rates are the voltage rate and the current rate.The aim of the paper is to present comparison of the methods described in [9] and [10].The comparison of these methods is made from the view-point of their theoretical background (the considered criteria of a harmonic source localization),principles of localization of harmonic sources,utilization,efficiency and case studies.
II.CONSIDERED LOCALIZATION CRITERIA
During an analysis of harmonics at the Point of Common
Coupling (the point PCC) the equivalent circuits shown in Fig.1 are utilized.The circuit from Fig.1a is more usable when harmonics in the voltage at the point PCC are considered,and the circuit from Fig.1b is used when a harmonic analysis deals with the current at the point PCC.Source C represents the customer side and Source U represents the utility side.The relation between V’c_pcc and V’u_pcc (Fig.2a) ,i.e.the relation between projections of Vc_pcc and Vu_pcc onto the voltage Vpcc,representing the impact of the sources Source C

I.INTRODUCTION
1.引 言
Solving the problem of a harmonic sources localization means solving the problem of responsibility for a harmonic generation,what is very essential from the view-point of disputes between suppliers and customers regarding harmonic distortion.解决谐波源定位的问题意味着解决谐波发生的责任问题,这从供电商和用户之间关于谐波失真的争论来看来看是非常重要的.There are many methods for localization of harmonic sources [1] - [10].谐波源的定位有好多方法[1－10].In the previous papers of the author the methods utilizing the specially-defined rates for a harmonic source localization have been proposed [9],[10].在作者以前的文章中,已经提出了利用专门为谐波源定位规定的比率（变化率）的方法[9],[10].The mentioned rates are the voltage rate and the current rate.The aim of the paper is to present comparison of the methods described in [9] and [10].所提到的这个比率就是电压比率和电流比率.本文的目的就是对文献[9]和文献[10]中描述的方法进行比较.The comparison of these methods is made from the view-point of their theoretical background (the considered criteria of a harmonic source localization),principles of localization of harmonic sources,utilization,efficiency and case studies.这些方法的比较是从它们的理论背景（所考虑的谐波源定位的准则）、谐波源定位的原理、利用、效率和案例研究出发而进行
问题补充：
II.CONSIDERED LOCALIZATION CRITERIA
During an analysis of harmonics at the Point of Common
Coupling (the point PCC) the equivalent circuits shown in Fig.1 are utilized.The circuit from Fig.1a is more usable when harmonics in the voltage at the point PCC are considered,and the circuit from Fig.1b is used when a harmonic analysis deals with the current at the point PCC.Source C represents the customer side and Source U represents the utility side.The relation between V’c_pcc and V’u_pcc (Fig.2a) ,i.e.the relation between projections of Vc_pcc and Vu_pcc onto the voltage Vpcc,representing the impact of the sources Source C
2.所考虑的谐波源定位的准则
在分析公共联结点（点PCC）处的谐波的过程中,利用了图1所示的等效电路.图1a的电路当在考虑点PCC处的电压中的谐波时更加有用,而图1b的电路则用于谐波分析处理点PCC处的电流时.源C代表用户侧,而源Q代表电力公司侧.V’c_pcc 和 V’u_pcc之间的关系 (Fig.2a),即Vc_pcc 和 Vu_pcc在电压Vpcc上的投影代表源C的影响.