摘要
在大规模电池储能系统现有平抑/平滑控制策略的基础上,提出了基于附加频率响应的并网控制策略,不仅能够兼容现有控制策略抑制新能源出力波动,还能较好地提高电力系统暂态稳定性。该控制策略包括3部分:现有平抑/平滑控制部分、附加频率控制部分和总体限幅部分。平抑/平滑控制部分兼容现有控制策略从而有效降低间歇式新能源的功率波动;附加频率控制部分以系统频率为输入信号实现对频率的一次调整,从而提高系统的暂态稳定性;总体限幅部分根据电池的实际运行状态动态地调整各控制部分上下限,达到均衡和最大化地利用储能系统。在西北电网的酒泉风电基地进行了基于附加频率控制策略的初步应用研究,仿真结果显示该控制策略可以有效地提高电网的稳定性。基于使新能源+储能电站和常规机组具有相同或相似的暂态稳定支撑能力的原则,酒泉风电基地的储能/风电配比可设置在5%附近。
Based on existing leveling/smoothing control strategy of battery energy storage system（BESS）,an additional frequency response-based grid-integration control strategy for BESS,which is not only compatible with existing control strategy to restrain output fluctuation of new energy sources,but also can improve transient stability of power grid,is proposed.The proposed control strategy is composed of three parts： existing leveling/smoothing control,additional frequency control and overall amplitude limiting.The leveling/smoothing control is compatible with existing control strategy to effectively restrain power fluctuation from batch-type new energy sources;utilizing system frequency as input signal,the additional frequency control implements the first frequency regulation to improve transient stability of power grid;based on actual operation conditions the overall amplitude limiting dynamically adjusts upper-and lower-limit of the output of each control to implement the utilization of energy storage system maximally and evenly.Preliminary application of additional frequency control strategy is researched at Jiuquan wind power base of Northwest China power grid,and simulation results show that this control strategy can effectively improve stability of power grid.Based on the principle that the renewable energy source generation integrated with BESS possesses the same or similar supporting capacity for transient stability as conventional units do,the configuration ratio of BESS to wind power in the Jiuquan base can be set as about 5%.
出处
《电网技术》
EI
CSCD
北大核心
2013年第2期327-333,共7页
Power System Technology
基金
"十二五"国家科技支撑计划重大项目(2011BAA07B03)~~
关键词
电池储能系统
附加频率
控制策略
暂态稳定
battery energy storage system（BESS）
additional frequency
control strategy
transient stability
