含高间歇性DG的配电网储能优化配置方法研究

Research on Optimal Allocation Method of Distribution Network Energy Storage Containing High Intermittent DG

高间歇性的分布式电源(DG)具有较大的随机性,并网发电后会对配电网运行的稳定性产生较大影响。为了保证配电网运行的电能质量和消纳能力,研究含高间歇性DG的配电网储能优化配置方法。首先,估算DG最大准入容量,分析配电网的消纳能力;接着,选取负荷控制目标,消除储能系统中存在的负荷毛刺。然后,基于需求侧响应协调规划配电网储能,以控制储能系统的发电和用电平衡。最后,建立含高间歇性DG的配电网储能优化配置模型,使电压趋近或保持在优化区间内。经试验论证分析,所提方法可以使负荷曲线的波动范围缩小到250~350 kW,对负荷具有更好的控制能力。该方法能够有效地解决电压越线的问题,具有较好的电压调节效果。

Distributed generation(DG)with high intermittency have large stochasticity,which will have a large impact on the stability of distribution network operation after grid-connected generation.To ensure the power quality and consumption capacity of distribution network operation,the optimal allocation method of distribution network energy storage containing high intermittent DG is researched.Firstly,the maximum access capacity of DG is estimated to analyze the dissipation capacity of the distribution network.Secondly,the load control target is selected to eliminate the load burr existing in the energy storage system.Then,the energy storage in the distribution network is coordinated and planned based on the demand-side response,and the balance between power generation and power consumption of the energy storage system is controlled.Finally,the optimal allocation model of energy storage in the distribution network containing high intermittent DG is established to make the voltage converge or remain in the optimized interval.After experimental demonstration and analysis,the proposed method can reduce the fluctuation range of the load curve to 250~350 kW,which has better control ability for the load.The method can effectively solve the problem of voltage crossing the line and has a better voltage regulation effect.