Abstract

With the deepening of the reform of the power system, electricity sales companies are required to explore new business models and provide multi-faceted marketing programs for users. At the same time, with the reduction of energy storage (ES) costs and the gradual maturity of technology, user side ES, especially Battery ES, has become an effective means for enhancing users' power supply reliability and reducing electricity bills. Battery ES, as the standby power supply, has a vast user side application. The configuration of ES can help users to ameliorate power quality and reduce electricity cost. It is a critical strategy for electricity sales companies to improve their competitiveness as well. Firstly, this paper analyzes the user side ES and introduces the user side ES development status and relevant policies. Then, we establish an ES configuration optimization model based on the cost–benefit system. To determine the optimal ES capacity of the system’s storage capacity, non-dominated sorting genetic algorithm with elite strategy (NSGA-II) is used as the method solving model. Finally, according to the cost-effectiveness of ES and the period of a contract signed by users, a price package with ES configuration is designed for users to choose.

Highlights

  • In March 2015, the State Council of CPC(the Communist Party of China) Central Committee adopted the Several Opinions on Further Deepening the Reform of China Electric Power System (Zhongfa (2015) Document #9) [1] to further enhance operational efficiency and break up monopoly in the power market

  • According to the cost-effectiveness of energy storage (ES) and the period of a contract signed by users, a price package with ES configuration is designed for users to choose

  • User side ES has a rapid development with technical support and policy encouragement, but some users may be deterred from ES, as the early involvement is too high

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Summary

Introduction

In March 2015, the State Council of CPC(the Communist Party of China) Central Committee adopted the Several Opinions on Further Deepening the Reform of China Electric Power System (Zhongfa (2015) Document #9) [1] to further enhance operational efficiency and break up monopoly in the power market. ES Project (lead-carbon battery 6 MW/36 MWh), built by Guangzhou Power Supply Bureau, covers approximately 120 square meters with a maximum power of 6 MW It can provide 36 MWh of reserve power with a millisecond response and saves nearly one million in electricity costs per year for Wanli tires. The model reduces the power supply costs of electricity sales companies by load shifting. The electricity sales companies add the ES cost to the electricity bill by additional electricity charges Does it reduce the pressure of the user’s initial investment, but it can promote signing long-term power purchase contracts with each other. According to the duration of the electricity sales contract, we design a power supply with energy storage configuration package for users to choose

Development of User Side ES in China
ES Investment Cost Analysis
Benefits of ES
Analysis of Investment Mode of ES
Objective Function
Energy Constraint
Power Constraint
Preventing Peak-to-Valley Inversion Constraints
Model Solving
Electricity Storage Price Setting
Case Analysis
Brief Introduction to the Case
Spare Capacity QRE and Power Configuration
Adjustable Capacity QAD Configuration
Improved Power Supply Reliability
Electricity Sales Package of the Electricity Sales Company
Findings
Conclusions
Full Text
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