新型时滞可再生电力系统集成模型的滑模负荷频率控制设计

Sliding Mode Load Frequency Control Design for the Novel Integrated Model of Time-delay Renewable Power System

现代化电力系统向规模化和广域化发展,区部控制已不能完全实现整个系统的稳定运行,使得电力系统开始依赖开放型通信网络,从而系统中通信时滞的问题越发严重。通过考虑通信时延和可再生能源波动,该文建立新型的集成系统模型,然后提出负载频率控制(load frequency control,LFC)以减小频率偏差。同时,采用滑模(sliding mode,SM)方法对LFC进行优化,可以提高不确定性和通信延迟不匹配的可再生系统的稳定性。此外,风力发电机组的输出功率还可以基于集成模型主动响应系统频率变化。最后,通过使用RTDS实验装置有效地证明该文提出的控制策略可以在各种负载扰动和通信延迟运行条件下来减小频率波动。

The modern power system is developing towards large-scale and wide-area,and district control cannot fully realize the stable operation of the entire system,which makes the power system begin to rely on open communication networks,and the problem of communication time lag in the system becomes more and more serious.The novel integrated system model was constructed through considering the communication time-delay and the renewable energy fluctuation,then the load frequency control(LFC)was proposed to reduce the frequency deviation.Meanwhile,the sliding mode(SM)method was used to optimize the LFC which can raise the stability of integrated renewable system with mismatched uncertainties and communication delay.Furthermore,the output power of wind turbine generator(WTG)can also actively respond to system frequency changes based on the integrated model.At last,it is proved that the control strategy put forward in this paper can lessen frequency fluctuation by using the RTDS device under various load disturbance and communication delay operating conditions.