考虑电池储能仿真模型的一次调频特性评估  

Performance Evaluation of Primary Frequency Regulation Considering Battery Energy Storage Model

作　　者：李欣然[1] 黄际元[1] 李培强[1] 刘卫健[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《高电压技术》2015年第7期2135-2141,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2012CB215106);国家自然科学基金(51477043)~~

摘　　要：为更好地利用电池储能服务于电网调频,对电池储能的一次调频特性展开了评估。首先,构建了满足调频研究需求的磷酸铁锂电池仿真模型,并依据多组实验数据辨识了模型中的参数,同时分析了恒功率运行方式对参数的影响。其次,提出了控制电池储能动作时机与深度的关键参量,即为调频死区和单位调节功率,基于此设计了相应的调节模式,并提炼了调频特性评价指标。最后,依托长沙—湘潭两区域电网算例,仿真分析了关键参量对电池储能一次调频特性的影响,且定量分析了电池储能相比传统电源的高效程度。结果表明,相比调频死区,单位调节功率对电池储能调频特性的影响更为明显;若电池储能和传统电源的调频容量及单位调节功率均相同,前者无调频死区时高效25倍以上,前者的调频死区为后者近两倍时高效约12.5倍。To achieve better use of battery energy storage in power grid frequency regulation, the primary frequency regulation performance of battery energy storage is evaluated in this paper. Firstly, a LiFePO4 battery simulation model meeting the needs of the primary frequency regulation research is constructed, and its parameters are identified based on multiple sets of experimental data, and the influence of constant power operation on the parameters is also analyzed. Then, the key parameters to control the action moments and depth of battery energy storage, namely, frequency regulation dead band and unit adjustment power, are proposed; thereby, the corresponding regulation mode is designed and typical indices for frequency regulation performance are extracted. Finally, taking Changsha-Xiangtan two regional grids as an example, the influence of the key parameters on primary frequency regulation performance is analyzed, and the efficiency of battery energy storage is compared quantitatively with that of conventional generators. The results show that, compared to frequency regulation dead band, unit adjustment power has more impact on frequency regulation performance of battery energy storage; when battery energy storage has the same frequency regulation capacity and unit adjustment power as conventional generators, battery energy storage has 25 times higher efficiency than conventional generators if it has no frequency regulation dead band and 12.5 times higher efficiency if its frequency regulation dead band is twice as much as of conventional generators.

关 键 词：一次调频 磷酸铁锂 仿真模型 调节模式 评价指标 调频死区 单位调节功率 调频特性 

分 类 号：TM912[电气工程—电力电子与电力传动]