基于变权值自适应滤波的风光储协调优化控制  

Optimal Control of PV-Wind-Storage Hybrid Power System Based on Variable Weight Adaptive Filtering

作　　者：李德鑫[1] 董添[1] 常学飞[1] 陈跃燕 韩晓娟[3] 

机构地区：[1]国网吉林省电力有限公司电力科学研究院,长春市130021 [2]中船重工(重庆)海装风电设备有限公司,重庆市401122 [3]华北电力大学控制与计算机工程学院,北京市102206

出　　处：《电力建设》2015年第4期32-37,共6页Electric Power Construction

基　　金：国家自然科学青年基金(51107126)~~

摘　　要：针对平抑风光储联合发电系统输出功率波动问题,提出一种具有变权值自适应滤波的风光储协调优化控制策略。在传统的加权移动滤波算法基础上,分析了储能出力、波动率以及滤波带宽的关系,以储能系统的荷电状态(state of charge,SOC)平衡度指标和并网功率波动率作为约束条件实时调整加权移动滤波算法的权值与滤波带宽。在给定的波动率约束下,实现风光储联合发电系统协调优化控制。算例表明,所提出的变权值自适应滤波算法优于传统的一阶低通滤波风光功率平滑效果,在保证SOC合理水平前提下,有效平抑了风光联合输出功率的波动,降低了储能系统充放电次数,提高了储能系统的使用寿命。This paper proposed an optimal control strategy for photovoltaic（ PV）-w ind-storage coordination based on variable w eight adaptive filtering to smooth the fluctuations of the output pow er in the PV-w ind-storage hybrid pow er system.Based on traditional w eighted moving filtering algorithm,the relationship of the output of energy storage system,the fluctuation rates and the filtering bandw idth w as analyzed; the balance index of the state of charge（ SOC） of energy storage system and the fluctuation rates of the output pow er connected to the grid w ere used as constraint conditions to optimize the w eight of the w eighted moving filtering algorithm and the filtering bandw idth. Under the given constraint of fluctuation rate,the coordination optimal control of hybrid pow er system including PV,w ind pow er and energy storage system w as achieved.The example results show that the smoothing performance of PV-w ind pow er of the proposed variable w eight adaptive filtering method is better than that of traditional first-order low-pass filtering method. Under the premise of maintaining a reasonable level of SOC,the fluctuation of PV-w ind output pow er is smoothed significantly,the charging or discharging times of energy storage system are reduced and the service life of energy storage system is improved.

关 键 词：波动率约束 加权移动滤波 荷电状态(SOC) 储能成本 滤波带宽 

分 类 号：TM73[电气工程—电力系统及自动化]