Energy Storage Science and Technology

   

Allocation method of operational efficiency of multi-shared energy storages in the distribution network based on Improved-Shapley value

Junbo HAO1(), Xiaohong Yan2, Honglan Pei2, Wenqiang Zhang3, Chun Xiao4,5   

  1. 1.State Grid Shanxi Integrated Energy Service Co. LTD, TaiYuan 030032, ShanXi, China
    2.State Grid Yuncheng Electric Power Supply Company, Yuncheng 044000, ShanXi, China
    3.State Grid Taiyuan Electric Power Supply Company, TaiYuan 030001, ShanXi, China
    4.State Grid ShanXi Marketing Service Center, TaiYuan 030032, ShanXi, China
    5.Taiyuan University of Technology, TaiYuan 030024, ShanXi, China
  • Received:2024-09-20 Revised:2024-10-10
  • Contact: Junbo HAO E-mail:1667672597@qq.com

Abstract:

The configuration of multiple shared energy storages(SESs) in a new distribution network(NDN) has become a trend, providing a multi-resource cooperative effect. However, it is difficult to realize the efficient use of SES by only considering its own value. Further attention needs to be paid to the multifaceted and comprehensive impacts of individual differences in SES on the NDN. To quantify the marginal operational contribution of a single SES under the joint effect of multiple SESs in the NDN, a method for allocating the operational efficiency of multi-SESs based on the improved Shapley value method is proposed. An optimized scheduling model with SES operation combinations for minimizing the operating cost for the NDN are established, considering new energy consumption and carbon emission reduction. The operational efficiency evaluation indicators, which consider the impact of SES on the economy, reliability, and environment of the NDN is established. An operational efficiency evaluation model based on the subjective-objective empowerment method combining improved hierarchical analysis and inter-criteria correlation is established. Considering the differences in the unilateral efficiency of different SESs to the NDN, the SES correction factors accounting for the economic contribution, reliability contribution, and environmental contribution are constructed to improve the Shapley value method to assign the operational efficiencies of multiple SES combinations to the single SES. A simulation of the NDN of an improved IEEE 33-node with three SESs validates that the proposed method effectively quantifies and allocates the comprehensive utility of SESs in different nodes to the NDN. The operational efficiency of SES1 and SES2, which have beneficial effects on the NDN, is increased. The proposed method provides a new way of thinking for the efficient scheduling and potential utilization of SESs in the network.

Key words: shared energy storage, efficiency evaluation, efficiency allocation, Shapley value, carbon emission reduction

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