华电技术 ›› 2020, Vol. 42 ›› Issue (4): 37-41.

• 储能技术 • 上一篇    下一篇

考虑电池能效的电网侧电化学储能电站最优功率控制策略研究

  

  1. 长园深瑞继保自动化有限公司,广东 深圳 518057
  • 出版日期:2020-04-25 发布日期:2020-05-15

Optimal power control strategy of grid-side electrochemical energy storage stations considering battery energy efficiency

  1. CYG SUNRI Company Limited,Shenzhen 518057,China
  • Online:2020-04-25 Published:2020-05-15

摘要: :目前在电网侧电化学储能电站的运行过程中,主要以全站最大可充放电功率进行控制约束条件,对于电站能效方面考虑不足。针对这一问题,提出了基于电池能效曲线的功率优化控制策略。以输出功率和能效作为目标,建立了考虑储能动态效率的电网侧电化学储能电站运行优化模型。该模型考虑了储能在充放电运行功率不同时的效率变化,将动态效率以近似线性函数的形式纳入储能电站优化模型。基于实际电网侧储能电站运行数据进行仿真分析,对比了在电网侧多应用场景下,不同充放电控制策略对电网运行控制的影响,证明了动态效率特性对储能电站综合能效具有一定影响,是电网侧电化学储能电站运行优化中值得考虑的因素。

关键词: 动态效率, 电化学储能, 功率控制, 磷酸铁锂电池, 可再生能源, 电池能效, 控制策略, 源网荷储

Abstract: During the operation of current grid-side electrochemical energy storage stations,the main controlling constraint is the maximum chargeable and dischargeable power of the whole station.To make a more sufficient consideration for energy efficiency of the stations,an optimized power control strategy based on battery energy efficiency curve is proposed. Targeting at the output power and energy efficiency,the operation optimization model of grid-side electrochemical energy storage stations considering the dynamic efficiency of energy storage is established.The model considers the variation of energy storage efficiency changing with different power during the charging and discharging,and incorporates the dynamic efficiency into the energy storage station optimization model in the form of an approximate linear function.The simulation analysis is carried out based on the actual operation data on grid side. Comparing the effect of different charging and discharging control strategies on grid operation control,it is proved that the dynamic efficiency characteristics will impact the comprehensive energy efficiency of the energy storage station to some extent and should be take into considering in operation optimization of grid-side electrochemical energy storage power station.

Key words: dynamic efficiency, electrochemical energy storage, power control, lithium iron phosphate battery, renewable energy, energy efficiency of battery, control strategy, source-grid-load-storage