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Synthetic evaluation of steady-state power quality based on combination weighting and principal component projection method

机译:基于组合加权和主成分投影法的稳态电能质量综合评价

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摘要

With integration of renewable energy and use of non-linear loads in power systems, the power quality problem is increasingly attracting attention of researchers. In China, standards for individual power quality indexes are set. However, when evaluating power quality in practice, individual indexes cannot directly reflect a comprehensive level of power quality. In this paper, a comprehensive analysis of various indexes is conducted to obtain a unified parameter for describing the characteristics of power quality from an overall perspective. First, weight values of power quality indexes are calculated by combining the subjective and objective weight. Then, based on the principal components of the projection method, projection values of boundary data and data to be evaluated are obtained. Finally, using these projection values, a grade range for power quality data is located. A practical case study is presented to show the validity of the proposed method for evaluating power quality.
机译:随着可再生能源的整合以及电力系统中非线性负载的使用,电能质量问题越来越引起研究人员的关注。在中国,制定了单个电能质量指标的标准。但是,在实践中评估电能质量时,各个指标不能直接反映电能质量的综合水平。在本文中,对各种指标进行了综合分析,以获得一个统一的参数,用于从总体角度描述电能质量的特征。首先,通过结合主观和客观权重来计算电能质量指标的权重值。然后,基于投影方法的主要成分,获得边界数据和要评估的数据的投影值。最后,使用这些投影值,找到电能质量数据的等级范围。提出了一个实际案例研究,以证明所提出的评估电能质量方法的有效性。

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