宁夏电网新能源电站快速频率响应特性研究分析

Research and analysis on fast-frequency response characteristic of new energy power station in Ningxia power grid

针对宁夏电网新能源占比不断升高,常规水、火电机组出力逐步减少,电网调频裕量日显不足,且直流大功率闭锁进一步加剧电网频率安全运行风险的现状,提出了一种适用于宁夏电网的新能源电站快速频率研究方法。通过开展试点研究,掌握光伏电站、风电场参与电网频率调节的特性,结合日常电网运行频率波动情况和试点场站挂网实测响应效果,制定了快速频率响应参数设置策略,西北全网试验验证了该方法的可行性。

In view of the status quo of increasing proportion of new energy in Ningxia power grid,the decreasing output of conventional hydro-thermal power units,the daily insufficient frequency regulation margin and the DC high-power blocking further intensifying the risk of the power grid’s safe operation,a fast-frequency research method for new energy power station was proposed which adapted to Ningxia power grid.By conducting pilot research,the characteristics of power grid frequency-regulation with the participation of photovoltaic power plants and wind farms were mastered.Combining with the daily frequency and the actual measurement response results of the pilot,the strategy for fast-frequency response parameter setting was made.The test of northwest power grid verified the feasibility of the method.