Comprehensive evaluation of power quality based on stepwise scatter degree method

作者：Ouyang, Sen^*; Huang, Rui-Yi; Cheng, Xiao-Hua

来源：Journal of South China University of Technology(Natural Science Edition), 2013, 41(5): 93-98+118.

DOI：10.3969/j.issn.1000-565X.2013.05.015

• Comprehensive evaluation
• Comprehensive model
• Evaluating index system
• Objective evaluation
• Power supply bureaux
• Regional power grids
• Scatter degree
• Synthesis method

Effective evaluation methods of power quality are important to the electricity market. In this paper, the synthesized subjective-objective weight is obtained by using the stepwise scatter degree method, and a comprehensive model is constructed to evaluate the power quality of regional power grids. In the investigation, first, a hierarchical division of the large-scale system and the subsystems is performed according to the power quality. Next, an evaluating index system of power quality is designed and the comprehensive evaluating functions of the subsystems and the large-scale system are established. Then, the synthesized weights of each system are determined by using the sequence synthesis method and the stepwise scatter degree method. Finally, the comprehensive power-quality evaluating values of each subsystem and the large-scale system are calculated by using the comprehensive evaluating functions. The proposed model helps to realize a bottom-up and multi-level comprehensive evaluation of power quality of regional power grids and obtain comprehensive, particular and objective evaluation results. Case study on a power supply bureau shows that the proposed model is effective.

• 出版日期2013-5
• 单位华南理工大学