摘要
在并网模式下,微电网通过控制联络线潮流的大小及方向,可以为大电网提供削峰填谷的辅助功能。但是,由于微电网系统中的可再生能源和负荷同时呈现随机波动的特性,使得微电网与主网相连的联络线上功率波动较大,并影响到配网的安全运行。为此,本文针对削峰填谷策略,提出一种微电网多时间尺度的能量优化管理方法。首先,通过模糊模型得到峰谷时段微电网与大电网联络线上的预设交换功率曲线;其次,提出了基于时计划、调整计划和实时计划三种不同时间尺度下的多能源协调优化方法,以实现削峰填谷策略下微电网的能量控制目标;最后,针对一个包含风/光/储微源的典型微网,对所述多时间尺度优化方法进行了仿真实验与分析,证明了该方法对于控制联络线功率波动的有效性。
By controlling the magnitude and direction of load flowat the PCC（ point of common coupling）,a grid-connected microgrid can provide load shifting service for utility. However,the variability and randomness of loads and renewable energy sources bring in great fluctuation of exchanging power at the PCC,which is harmful to the operation safety of the grid. To solve this problem,a multi-time scale energy optimization method for microgrid is proposed aiming at load shifting. Firstly,the optimal preseting exchanging power curve is obtained by fuzzy control. Secondly,in order to satisfy the energy control target of microgrid with load shifting,a three time scale multi-energy optimization method is proposed including hourly schedule,regulative schedule and real-time schedule.Finally,the proposed method is applied to a typical microgrid with wind turbine（ WT）,photovoltaic（ PV） generation,batteries and loads,simulation and analysis results verify the efficiency of the proposed multi-time scale method on the spression of the pwer flutuationat PCC.
出处
《南方电网技术》
北大核心
2016年第8期23-31,共9页
Southern Power System Technology
基金
国家自然科学基金项目(51577047)
广东省引进创新团队项目(2011N015)
安徽省科技攻关项目(1501021049)~~
