改进的层次分析法在含分布式电源系统电能质量综合评估中的应用

doi:10.11930/j.issn.1004-9649.2014.12.72.6

摘要/Abstract

摘要： 鉴于电能质量各项指标的复杂性和非线性特点,提出了一种采用重要、同等重要、不重要三标度的改进层次分析法,并以此对传统层次分析法的一致性判定进行了改进,将其应用在分布式发电系统电能质量评估中,可使每个指标的差异性更加清晰,评估结果也愈加准确;根据现有标准,从频率偏差、电压偏差、电压波动、电压闪变、谐波电压和三相电压不平衡6个维度建立了电能质量评估模型;通过专家决策,对每项电能质量指标进行量化处理,采用改进的层次分析法求出了6项指标对于目标电能质量的权重值;通过对原始监测数据的处理,结合权重值,求得了每个变电站母线电能质量的评分值,对总体电能质量进行了评估,并将所提方法与其他分析方法进行对比,结果证实了所提方法是可行的,其计算结果可供相关工作人员参考。

关键词: 分布式电源, 层次分析, 电能质量, 综合评估

Abstract: Considering the complicated and nonlinear characteristics of power quality indices, an improved analytical hierarchy method is introduced in this paper for power quality assessment of distributed generator system. The method uses the three-demarcation to improve the traditional unanimous decision, and, as a result, the difference of each index become clearer and the result is more accurate. Firstly a power quality assessment hierarchy model is established from six dimensions including frequency bias, voltage deviation, voltage fluctuation, voltage surge, voltage harmonic and three-phase voltage unbalance factor. Secondly, each power quality index is quantified through expert decision, and the weight to the power quality of above six indices obtained with the improved analytical hierarchy method, The power quality from each substation bus is graded through processing the original monitoring data and with combination of the weight value. Finally, the overall assessment of power quality is given. Compared with other methods, the improved analytical hierarchy method is proved to be feasible and effective. The calculated result of the proposed method can provide a reference for the technicians.

Key words: distributed generator, analytical hierarchy process, power quality, comprehensive assessment

中图分类号:

TM721

赵宪, 周力行, 邓维. 改进的层次分析法在含分布式电源系统电能质量综合评估中的应用[J]. 中国电力, 2014, 47(12): 72-78.

ZHAO Xian, ZHOU Li-xing, DENG Wei. Application of Improved Analytical Hierarchy Process in Comprehensive Assessment of the Power Quality With Distributed Generators[J]. Electric Power, 2014, 47(12): 72-78.

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https://www.electricpower.com.cn/CN/Y2014/V47/I12/72

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