电储能与燃煤发电机组联合调频响应

Combined Frequency Regulationof ESS and Coal-fired Power Unit

随着新能源并网规模和特高压线路数量的增多,电网频率管理也愈发严格。由于蒸汽动力系统具有流程长、热惰性大等问题,燃煤发电机组面临的调频工作压力也越来越大。为了解决以上问题,对储能系统辅助调频应用开展了深入研究。介绍了电储能系统与燃煤发电机组联合响应自动发电控制(auto generation control,AGC)调频调度指令的系统结构,在Matlab/Simulink环境下建立了储能调频系统的仿真模型,并根据实际电厂数据进行了计算分析。仿真结果表明,增加一定规模的储能调频系统可以将合并输出调频性能提高2~3倍,避免被考核。还从多个方面对储能调频系统不同接入方式的安全性进行了分析,认为储能调频应用不会对机组安全运行带来隐患。储能调频系统可以从发电辅助服务市场获得补偿,减少机组过度调节,延长设备寿命,对电力系统安全高效运行具有重要意义。

With the surge of new energy integration and ultra-high voltage(UHV)lines,it calls for even more strict management in frequency regulation of power grid.Considering the long process flow,large thermal inertness of steam power system,the coal-fired power units are facing even higher pressure in frequency regulation.For this,an energy storage system(ESS)-aided frequency regulation was discussed in this paper.The system structure of dispatching command for combined ESS and coal-fired power units,was proposed;the simulation model was built on the platform of Matlab/Simulink to study the frequency regulation of energy storage;an instance study was made with practical operation data.The results show that the combination system can serve 2to 3times response than conventional system;the introduction of such ESS system with energy storage would not affect the safe operation of power units;It makes great reference for the development of auxiliary service market for power generation in reduced over-regulation,prolonged life span,safer and higher-efficiency operation of power system.