大型电力系统励磁比例–积分–微分调节器的闭环优化方法

采用传统频域方法进行发电机比例–积分–微分(proportional integral differential，PID) 励磁调节器的参数设计时只考虑本机组的运行，而忽视了电网的整体运行情况，且性能好坏取决于设计人员的经验。针对这种情况，提出了基于大型电力系统时域仿真曲线的励磁PID调节器闭环优化方法，既能综合考虑机组和电网的运行情况，又能克服传统设计过于依赖经验的不足。该方法使用时域积分性能指标来评价含有PID调节器的闭环电力系统的综合性能，运用Nelder-Mead单纯形方法来有效搜索最优的PID参数。在实际大型电网中的应用结果表明，该优化方法可有效提高大电网电压的动态调节能力，有很好的实际应用前景。

Closed-Loop Optimum Design Method for PID Controller of Excitation System in Large-Scale Power System

Classical design for proportional integral differential (PID) parameters of an automatic voltage regulator (AVR) system is based on single generator that ignores the effect of power grid, and is subject to experiences of designers. To comprehensively consider the operation condition of both unit and power grid and overcome the defect in traditional design that depends on experiences too much, a closed-loop optimum design method, in which the whole power system where PID controller is equipped is taken into consideration, is proposed in this paper. Time-domain integral criterion is adopted to evaluate overall performance of closed-loop system, and Nelder-Mead simplex method is employed to search the optimal PID parameters efficiently. Applying the proposed method to a certain large-scale power grid, results demonstrate that dynamic voltage performance of power system is enhanced greatly.