摘要
电力系统遭受功率扰动后,频率响应呈现明显的时空分布特征,不同地区的频率响应非同步现状,决定了互联电力系统的调频能力仍有提升空间。由于电力系统多阶段协调运行方能实现最优,文中以安全经济协调为目标,基于面向电力系统频率稳定的三道防线,提出多阶段协调的主动频率响应控制策略。在预防控制阶段,通过预购调频容量进行调节能力储备;在紧急控制阶段,通过前馈主动控制利用频率响应时空分布特性提升系统调频能力;在校正控制阶段,通过惩罚项设置避免影响系统安全、触发低频减载。算例分析与仿真验证均表明,文中所提的基于三道防线协调的交直流混联电网主动频率响应控制策略,在安全性方面优于被动频率响应模式,在经济性方面优于单阶段运行控制,总体控制效果提升明显。
After power disturbances occur in power systems,the frequency response presents significant spatial-temporal characteristics.The current situation of asynchronous frequency response in different areas determines that there is room for improvement in the frequency regulation capability of interconnected power systems.Due to the optimal operation of power systems through multi-stage coordinated operation,this paper proposes a multi-stage coordinated active frequency response(CAFR)control strategy based on three lines of defense for frequency stability of power systems,aiming at safety and economic coordination.In the prevention control stage,the regulation capacity is reserved by purchasing the frequency regulation capacity in advance;In the emergency control stage,the frequency response spatial-temporal characteristics are utilized to enhance the frequency regulation capability of the system through feedforward active control;In the correction control stage,penalty items are set to avoid affecting system safety and triggering under frequency load shedding(UFLS).Both numerical example analysis and simulation verification show that the proposed active frequency response(AFR)control strategy for AC/DC hybrid power systems based on three lines of defense coordination is superior to the passive frequency response(PFR)mode in terms of security,and is more superior to the single stage operation control in terms of economy,with significant improvement in overall control effectiveness.
作者
李梓锋
褚洪川
孙乔
李宏伟
付绍文
陈若尘
赵博群
李卫东
LI Zifeng;CHU Hongchuan;SUN Qiao;LI Hongwei;FU Shaowen;CHEN Ruochen;ZHAO Boqun;LI Weidong(Dalian University of Technology School of Electrical Engineering,Dalian Liaoning 116001;.2.Dalian Electric Power Supply Company of State Grid Liaoning Electric Power Co.,Ltd.,Dalian Liaoning 116001;.3.State Grid Hebei Electric Power Co.,Ltd.Marketing Service Center(Measurement Center),Shijiazhuang Hebei 050000)
出处
《东北电力大学学报》
2025年第4期53-62,共10页
Journal of Northeast Electric Power University
基金
国家自然科学基金(UZZA20223)。
关键词
电力系统
频率响应
三道防线
协调运行
控制策略
electric power system
frequency response
three lines of defense
coordinated operation
control strategy
