基于动态下垂控制的温控负荷一次调频控制策略

利用温控负荷(Thermostatically Controlled Loads, TCL)作为调频资源参与电网调频是应对高比例可再生能源并网的有效手段。提出了一种基于动态下垂控制的TCL一次调频控制策略。考虑聚合商TCL平均温度状态(State Of Temperature, SOT)、调频容量和系统频率变化率,构建动态下垂控制模型,实时调整下垂控制系数,改变TCL聚合商调频参与度。在这种情况下,当向上调频时,锁定关状态TCL；当向下调频时,锁定开状态TCL,确保频率快速恢复至额定值附近。同时,为确保用户的舒适度,利用TCL的SOT优先级排序列表派遣法,确定TCL参与调频顺序。最后,在Matlab/Simulink平台上进行仿真分析,仿真结果验证了文中所提策略在确保用户舒适度、改善频率质量等方面的有效性。关键词：需求响应；温控负荷；下垂控制；频率变化率；一次调频中图分类号：TM73

Thermostatically controlled loads control for primary frequency regulation based on dynamic droop control

Using thermostatically controlled load (TCL) as a frequency regulation resource is an effective means of maintaining power grid frequency stability caused by the high proportion integration of renewable energy power generation into the power grid. A primary frequency control strategy is proposed for the participation of TCL in regulation based on dynamic droop control. The dynamic droop control model is constructed to control the participation of TCL aggregators in frequency regulation by adjusting the droop control coefficient in real time, while considering the average state of temperature of TCL,the capacity for frequency regulation and the rate of change of system frequency. In this condition,the off state of TCL is locked for regulation up,vice versa the on state is locked for regulation downward. Therefore,the frequency can quickly return near its rated value. At the same time,to ensure the user''s comfort,the priority ranking list dispatch method on the state of temperature is used to determine the order of TCL for frequency regulation. Finally,simulations on the Matlab/Simulink platform show the effectiveness of the proposed strategy in improving frequency quality and the user''s comfort.