MW级飞轮阵列在新能源场站一次调频中的应用

Research on the application of MW-level flywheel array for primary frequency regulation in wind farms

针对新能源场站一次调频技术的迫切需求,本工作研究了MW级飞轮阵列在此场景下的创新应用,设计了飞轮储能阵列系统集成接入方案,提出了飞轮储能阵列参与新能源场站一次调频控制策略,并在新能源场站主变低压侧(35 kV)独立接入了一套5 MW/175 kWh的飞轮阵列系统。为了全面验证该方案的可行性与性能优势,本工作实施了一系列的试验测试,涵盖单机充放电快速切换、频率阶跃扰动响应、防扰动性能校验以及一次调频死区测试等多个维度的工况试验。此外,结合现场长期运行的实时监测数据,综合分析表明,采用MW级飞轮阵列显著增强了新能源场站的一次调频能力,提高了系统响应速度。

This paper addresses the urgent need for primary frequency regulation technology in new energy power stations.It explores the innovative use of megawatt(MW)-scale flywheel arrays,designs an integration scheme for these flywheel energy storage systems,and proposes a control strategy for their application in primary frequency regulation within renewable energy power stations.A 5 MW/175 kWh flywheel array system has been independently connected to the low-voltage side(35 kV)of the main transformer in a renewable energy power station.To thoroughly validate the feasibility and performance advantages of this setup,a series of experimental tests have been conducted.These tests cover various aspects,including rapid switching between charging and discharging for a single unit,response to frequency step disturbances,anti-disturbance performance,and primary frequency regulation dead-zone testing.Furthermore,an analysis of long-term real-time monitoring data from the site reveals that the implementation of MW-scale flywheel arrays significantly improves the primary frequency regulation capability of renewable energy power stations,leading to a faster system response.