光储系统功率波动平抑策略研究  

Study on fluctuation smoothing strategy of photovoltaic/storage system

作　　者：张增辉[1] 邓宇豪 李春卫 刘妹琴[2] Zhang Zenghui;Deng Yuhao;Li Chunwei;Liu Meiqin(Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China;School of Electrical Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]中国电建集团华东勘测设计研究院,杭州311122 [2]浙江大学电气工程学院,杭州310058

出　　处：《电测与仪表》2021年第7期111-116,共6页Electrical Measurement & Instrumentation

摘　　要：光伏发电直接并网会对电网的安全稳定运行造成威胁,利用储能系统对光伏功率进行平抑可以减小功率波动对电网的冲击。文中提出了一种基于最小二乘法的平抑控制算法,根据发电曲线的波动程度自动调整算法参数,同时实现波形的平滑和跟踪。通过建立蓄电池寿命模型仿真验证了该方法的有效性。相较于传统滤波算法,该方法在满足平抑目标的同时,能够减少储能系统不必要的充放电,延长了蓄电池的使用寿命。研究结果对实际的光伏平抑策略制定具有一定的参考价值。The direct connection of photovoltaic(PV)power generation to the grid will threat to the stable operation of the power grid.An energy storage system is available to reduce the impact on grid caused by PV power fluctuation.In this paper,a smoothing control algorithm based on least squares method is proposed.According to the fluctuation degree of generation curve,the algorithm automatically adjusts its parameters.So the smoothing and tracking of the waveform are realized at the same time.The validity of this strategy is verified through simulation with a battery lifetime model.Compared with the traditional filtering algorithm,this method can reduce the unnecessary charging and discharging of the energy storage system and prolong battery lifetime while satisfying the smoothing goal.The research results have certain reference value for the formulation of actual PV stabilization strategy.

关 键 词：储能系统 平抑算法 低通滤波 最小二乘拟合 储能寿命 

分 类 号：TM71[电气工程—电力系统及自动化]