区域电网供电系统稳定性优化控制研究

Optimum Control Research for Stability of Regional Power Grid Power Supply System

对电力系统中区域电网供电系统稳定性优化控制,可保证系统稳定和电能质量。但是,在实际工业控制中,调速器死区和发电速率约束(generation rate constraint,GRC)等非线性特性是普遍存在的,使系统性能受到恶化,甚至出现不稳定。为了保证系统稳定和消除非线性特性对系统的影响,提出了线性自抗扰控制(linear active disturbance rejection control,LADRC)方法。接着,提出了一种利用LADRC的误差补偿策略。仿真结果显示,所设计的控制器结构简单,计算方便,便于应用。提出的误差补偿策略确实能够提高LADRC的控制效果,很好地恢复和改善了系统的控制性能,证明提出的方法和补偿策略是可行且有效。

Due to the nonlinear characteristics, such as governor dead - zone and generation rate constraint （GRC） , the dynamic performance of regional power grid power supply system can be degraded, and even unstable. To guarantee the stability of the system and eliminate the effect of the nonlinearities, a linear active disturbance rejec- tion control （LADRC） method is proposed. And then, an error compensation scheme is proposed for LADRC. Simulation results show that the structure of the designed controller is simple, convenient and easy to be applied. The error compensation scheme can improve the control performance of LADRC, and the control performance of the system can be recovered and improved well via the proposed scheme. Therefore, the proposed method of LADRC and the compensation scheme are feasible and effective.