Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (8): 2574-2584.doi: 10.19799/j.cnki.2095-4239.2022.0127

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Risk assessment of battery safe operation in energy storage power station based on combination weighting and TOPSIS

Yong XIAO(), Jun XU   

  1. Shanghai University of Electric Power, Shanghai 200090, China
  • Received:2022-03-08 Revised:2022-03-21 Online:2022-08-05 Published:2022-08-03
  • Contact: Yong XIAO E-mail:xxxiaoyong@163.com

Abstract:

This study introduces a risk assessment method for the safe operation of batteries based on a combination of weighting and technique for order preference by similarity to ideal solution (TOPSIS) to prevent and improve the current situation of frequent fire and explosion accidents caused by poor battery operation in energy storage power stations. First, the causes of accidents are identified by consulting literature, standard specifications, and accident investigation reports, and the safe condition that the battery should have during operation is described based on current standards. The risk assessment system is established from six aspects: the battery's basic situation, the battery's service condition, external stimulation, the operating environment, the safety monitoring and protection system, and human factors. Second, the subjective and objective weights of indicators in the risk evaluation system are determined using the analytic hierarchy process and entropy weight method, and the two weights are combined. Finally, the TOPSIS method is compared with the standard value to comprehensively evaluate the battery's safe operating risk. This method is applied to the battery operation risk assessment of four energy storage power stations. The evaluation results show that three of them have some issues with battery operation, but the overall safety situation is relatively good, while one has more serious problems in the operation risk index management and urgently requires improvement. The results are consistent with the actual situation of battery operation risk at each site, demonstrating that the method is reasonable and feasible.

Key words: energy storage power station, battery safety, risk assessment, AHP, entropy weight method, TOPSIS

CLC Number: