用于电网调节能力提升的电热氢多源协调储能系统模型

A Model and Coordinated Optimization for the Multi-energy Storage System of Electricity Heat Hydrogen to Regulation Enhancement of Power Grid

针对新能源接入规模不断扩大后电网调节灵活性日益下降的问题,研究一种与抽水蓄能电站及电池储能电站具有相同调节能力与调节特性的多源储能系统。该文提出由电热氢多种能源形式构成的多源协调储能系统(electricityheat hydrogen multi-energy storage system,EHH-MESS),以及其优化运行模型,提高电网风电、光伏消纳能力,并减轻电网调峰压力。根据电网新能源波动特性及峰谷差参数,研究在大规模风光波动及峰谷调节时的电网功率调节需求特性,建立以总运行成本最小为目标的多源存储系统容量优化模型,在此基础上建立电热氢多源储能系统的功率平衡及运行约束方程,并提出基于最优协同控制理论的多源协调优化储放策略求解模型。最后,针对多源储能系统的3种运行模式进行仿真分析,仿真结果表明,提出的电热氢多源储能系统能够有效提升电网调节灵活性和经济性,可实现对电池储能系统的高效替代。

Decreasing power grid regulation flexibility with integration of large-scale renewable energy, a multi-energy storage system architecture and its coordination operation strategy with similar regulation capability and regulation characteristics of pumped storage station and battery storage station(BESS) were studied. This paper proposed a multi-energy storage system(EHH-MESS) composed of multiple energy forms of electricity, heat, hydrogen to improve the curtailment of wind power and photovoltaic(PV) power grid and reduce the peak load regulation pressure of the grid. According to the fluctuation characteristics and peak-valley difference parameters of new energy in power grid, the demand characteristics of power regulation in large-scale wind and solar fluctuations and peak-valley regulation were studied, and the capacity optimization model of EHH-MESS with the objective of minimizing the total operating cost was established. On this basis, the power balance and operation constraints of EHH-MESS were established. Based on the optimal cooperative control theory, a multi-source coordinated optimal storage strategy solution model was proposed. Finally, three operation modes of EHH-MESS were simulated and analyzed. The simulation results show that the proposed EHH-MESS can effectively improve the flexibility and economy of power grid regulation, and can effectively replace the battery energy storage system.