基于模糊自适应指令分解的飞轮-火电一次调频控制策略

Primary Frequency Regulation Control Strategy for Flywheel-Thermal Power Joint System Based on Fuzzy Adaptive Command Decomposition

随着风电等波动性新能源电力渗透率的不断提高,电力系统对火电等主力电源的调频性能提出了更高要求,储能辅助调频是实现火电机组调频性能提升、促进新能源规模化发展的有效手段。以飞轮储能为研究对象,建立了飞轮-火电联合系统一次调频模型,提出了基于滤波时间常数模糊自适应调节的一次调频指令分解方法,设计了基于飞轮-火电分频协同支撑的一次调频控制策略,实现了飞轮-火电联合系统对电网频率的灵活响应。基于构建的等调频容量的飞轮-火电联合系统进行了仿真验证,结果表明,所提策略进一步提升了飞轮-火电联合系统的调频性能。

With the continuous increase in the penetration rate of fluctuating renewable energy such as wind power,the power system has put forward higher requirements for the frequency regulation performance of main power sources such as thermal power.Energy storage assisted frequency regulation is an effective means to improve the frequency regulation performance of thermal power units and promote the large-scale development of renewable energy.Taking flywheel energy storage as the research subject,a primary frequency regulation model of the flywheel-thermal power joint system is established,and a method for decomposing primary frequency regulation instructions based on fuzzy adaptive adjustment of filtering time constant is proposed.A primary frequency regulation control strategy based on flywheel-thermal power frequency division collaborative support is designed,achieving a flexible response of the flywheel-thermal power joint system to grid frequency.Simulation verification is conducted on a flywheel-thermal power joint system with equal frequency modulation capacity,and the results show that the proposed strategy further improves the frequency regulation performance of the flywheel-thermal power joint system.