Research on the Dynamic Comprehensive Evaluation of Power Quality Based on the Improved Scatter Degree

DOI

10.2991/ipemec-15.2015.129How to use a DOI?

Keywords

Power Quality; Scatter Degree; method; Grey Relational Analysis; Dynamic Comprehensive Evaluation

Abstract

In view of the sensitivity of power quality indices on different loads, a method for the dynamic comprehensive evaluation of power quality based on the improved scatter degree was put forward. Firstly, according to the sensitivity of power quality indices on different loads, the order relation among such indices is determine, the subjective weight vectors are obtained by the application of its analysis method, and the measured values of power quality indices are weighted according to those vectors, those subjective weighting values are turned into the objective weights by the scatter degree method, at this moment the objective weights are the comprehensive weight of the sensitivity of different power quality indices on the loads. Secondly the dynamic weight vectors are obtained by adjusting the comprehensive weights according to the distribution situation of the measured index values, considering the influence of the cask effect. Finally the level of the power quality at each monitoring point will be obtained by means of the dynamic weight vectors and grey relational analysis. The power quality evaluation program is based on the MATLAB software, analyses the measured values of 220kV Xindu substation and 110kV Huifeng substation in Guangxi, the results are proved that the improved method is reasonable and practical, compared with the results of the other methods in the references.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Min Guo
AU  - Weidong Chen
AU  - Qingren Jin
AU  - Hongbo Chu
PY  - 2015/05
DA  - 2015/05
TI  - Research on the Dynamic Comprehensive Evaluation of Power Quality Based on the Improved Scatter Degree
BT  - Proceedings of the 2015 International Power, Electronics and Materials Engineering Conference
PB  - Atlantis Press
SP  - 688
EP  - 695
SN  - 2352-5401
UR  - https://doi.org/10.2991/ipemec-15.2015.129
DO  - 10.2991/ipemec-15.2015.129
ID  - Guo2015/05
ER  -