电站甩负荷情况下动力系统的协调控制策略研究

Research on Coordinated Control Strategy of Power System under Sudden Load Rejection

针对电站甩负荷时,主蒸汽压力易产生超压,且传统PID控制器无法快速有效地控制主蒸汽压力的问题,设计了燃烧系统和主机回汽协调控制策略以及小脑神经网络(Cerebellar Model Articulation Controller,CMAC)与PID并行的控制器,并在Simulink平台上进行了电站甩30%和100%负荷时系统动态特性仿真。结果表明:所设计的控制策略和控制器能够使主蒸汽压力控制系统较快地对电站的大负荷扰动作出响应,取得较好的控制效果,保障动力系统的稳定。

In order to solve the problem that the main steam pressure is easy to generate overpressure when the power plant is under load rejection,and the traditional PID controller can not control the main steam pressure quickly and effectively,this paper designs a coordinated control strategy for combustion system and main engine return steam,and the controller of CMAC and PID parallel.The simulation of the dynamic characteristics of the system is performed with the Simulink platform for the load rejection of 30% and 100%.The results show that the designed control strategy and controller can make the main steam pressure control system react quickly to the large load disturbance of the power plant,and achieve better control effect,ensuring the stability of the power system.