Application of Improved Analytical Hierarchy Process in Comprehensive Assessment of the Power Quality With Distributed Generators

doi:10.11930/j.issn.1004-9649.2014.12.72.6

Abstract

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

CLC Number:

TM721

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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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.12.72.6

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

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