为了有效地平抑风电场的功率波动,提高风电场的并网特性,增强风电场并网运行的经济性和可靠性,提出了一种计及储能寿命的风储电站分层优化控制策略。首先,从经济学角度分析储能系统的充放电特性,考虑不同控制方式对储能系统寿命的影响；其次,采用分层-分区控制方式对风储电站进行协调控制,上层根据电网调度需求,考虑分时电价政策对集中式储能和整个风电场级进行协调功率控制,下层考虑区域内分布式储能和多台风电机组间的协调功率控制；最后,采用改进遗传算法对分层优化控制模型求解。结果表明:所提出的基于储能寿命损耗的风储电站优化控制方法实现了风储电站中储能系统及风机出力的合理分配,在延长储能寿命的同时提高了电网对风电的消纳能力,使得整个风电场运行经济性显著提高。

In order to effectively stabilize the power fluctuations of the wind farm, improve the grid connection characteristics of the wind farm, and increase the economics and reliability of the wind farm to achieve gridconnected operation, a hierarchical optimization control strategy for wind storage stations that took into account the energy storage life was proposed. Firstly, from the perspective of economics, the charge and discharge characteristics of the energy storage system were analyzed, and the influence of different control methods on the life of the energy storage system was considered. Secondly, the stratifying and zoning control method was used to coordinate the wind power storage station, in which the upper layer performed coordinated power control on centralized energy storage and the entire wind farm level according to grid dispatching demand and timesharing electricity price policy, and the lower layer considered distributed energy storage in the area and coordinated power control between multiple wind turbines. Finally, the improved genetic algorithm was used to solve the hierarchical optimization control model. The results showed that the hierarchical optimization control method realized the reasonable distribution of the energy storage system and the output of the wind turbine in the wind power storage station, the energy storage life was extended, the grid’s ability to absorb wind power was enhanced, and the economic efficiency of the entire wind farm was significantly improved.

TM 762

国家电网公司科技项目“清洁能源电网规划关键技术研究”(LNDL2018YF02)