风光水储多能互补发电系统双层优化研究

RESEARCH ON TWO-LAYER OPTIMIZATION OF WIND-SOLAR-WATER-STORAGE MULTI ENERGY COMPLEMENTARY POWER GENERATION SYSTEM

针对风电、光伏大规模并网造成的供电可靠性问题和弃风、弃光问题,结合抽水蓄能、储能电站以及电解水制氢的调节特性,提出一种风光水储多能互补系统双层优化调度策略。上层模型以系统全生命周期运行经济性最优为目标,旨在优化系统各单元的容量配置,保证供电可靠性和风光消纳水平;下层模型以系统每个调度周期内经济性最优为目标,旨在充分发挥储能的调峰能力,实现系统经济运行。该模型利用KKT条件和Big-M法将双层模型转换成单层线性规划问题,通过Matlab中调用CPLEX求解器进行求解,结果表明所提策略能有效提高系统供电可靠性和风光的消纳水平,验证了该模型的有效性。

In view of the power supply reliability problems caused by the large-scale grid connection of wind power and photovoltaic power,and wind and light abandonment problems,combined with the regulation characteristics of pumped storage,energy storage power plants and electrolytic water hydrogen production,a two-layer optimal dispatching strategy for wind water storage multi energy complementary system is proposed.The upper layer model aims to optimize the capacity configuration of each unit of the system to ensure the reliability of power supply and the level of wind and solar energy consumption,with the objective of optimizing the operating economy of the system throughout its life cycle;The lower level model aims to optimize the economy of the system in each dispatching cycle,and aims to give full play to the peak shaving output of energy storage to achieve economic operation of the system.The model uses KKT condition and Big-M method to transform the two-layer model into a single-layer linear programming problem,and calls CPLEX solver in Matlab to solve it.The results show that the proposed strategy can effectively improve the power supply reliability of the system and the absorption level of wind and solar energy,which verifies the effectiveness of the model.