低压成套无功补偿装置谐波抑制检验方法研究

Research on Harmonic Suppression Test Method of Low Voltage Reactive Power Compensation Assemblies

针对GB/T 15576标准中规定的抑制谐波或滤波功能试验项目,没有给出明确的试验方法和试验要求,仅仅是规定了电网接入点的谐波允许值,因而无法对补偿装置的谐波抑制或滤波能力进行有效的评价,本文通过对谐波抑制工作原理的分析,准确推导出了不同情况下的谐波理论补偿率的计算方法,并给出两种分别使用谐波电流源和谐波电压源进行谐波抑制能力检验的定量分析方法,进而可据此准确衡量补偿装置的谐波抑制能力。对比理论推导和仿真验证的数据,表明本文提出的方法能够准确有效地评价产品的谐波抑制能力。可为第三方检测机构开展低压成套无功功率补偿装置产品GB/T 15576标准谐波抑制试验提供参考。

In view of the test items of harmonic suppression or filtering function specified in GB/T15576,no explicit test methods and test requirements are given and only the harmonic allowable value of the power grid access point is specified.So,it is impossible to evaluate the harmonic suppression or filtering capability of compensation devices effectively.Based on the analysis of the working principle of harmonic suppression,this paper accurately deduces the calculation method of harmonic theoretical compensation rate in different conditions,and gives two quantitative analysis methods of harmonic suppression ability test using harmonic current source and harmonic voltage source respectively,so as to accurately measure the harmonic suppression ability of compensation device.By comparing the theoretical derivation and simulation data,this paper shows that the proposed method can accurately and effectively evaluate the harmonic suppression ability of products.This paper can also provide a reference for the third-party testing bodies to carry out the harmonic suppression test about the low-voltage complete reactive power compensation device product with GB/T15576 standard.