含新能源接入的配电网中储能系统协调控制策略

Coordinated Control Strategy of Energy Storage Systems in Distribution Network with the Integration of New Energy

以提高电网对新能源接纳能力为目的,本文研究了含新能源的配电网中电池储能系统的协调控制策略,针对配电网有功功率波动、新能源接入点电压波动建立优化模型,使用NSGA-II算法(快速非支配排序遗传算法)求解其Pareto非支配解集,实现多个储能系统的协调控制。使用该控制方法,可以将分布式储能系统联合调度,较好地平抑配电网整体的有功功率波动,同时改善新能源接入节点电压波动,提高电力系统稳定性。最后,本文对IEEE14节点配电网进行算例分析,在该配网中接入了接近负荷一半的光储和风储系统,将原本只和本节点光伏或风电配合的储能系统联合考虑,协调控制其出力,最后通过对比一个完整调度周期内储能系统单独控制和协调控制的效果,表明本文协调控制策略的有效性。

With the purpose of improving the ability of power grid to incorporate new energy,the coordinated control strategy of the battery energy storage systems in the distribution network with the integration of new energy is studied in this paper.An optimization model is built by considering of the active power fluctuation of power grid and voltage fluctuation on the access points of new energy,and the NSGAII algorithm is used to solve the Pareto non-dominated solution set to achieve coordinated control of multiple energy storage systems.By using this control method,the distributed energy storage systems can be jointly dispatched to stabilize the active power fluctuation of distribution network,to improve the voltage fluctuation on access point of new energy,and to enhance the stability of the power system.In this paper,the analysis case of IEEE14-node distribution network is studied,which incorporates PV-storage and windstorage systems with capacity close to half load.The joint dispatching of energy storage systems with PV or wind power generations are taken to control power output of the system.In the end,by comparing the effects of individual control and coordinated control of energy storage systems in a complete scheduling cycle,the effectiveness of the proposed strategy in this paper is demonstrated.