为进一步提高多区域多电源互联电力系统负荷频率闭环调节的性能,以两区域包含火电、水电及燃机等多个发电单元的互联电力系统为模型,提出了用正余弦优化算法对各发电单元的控制器进行动态优化的策略,对两区域发电功率为2000MW、负荷为1740MW的互联电力系统的负荷频率控制系统进行了建模,研究了以绝对误差的积分准则(ITAE)为优化约束函数,对两区域电力系统中的火电、水电以及燃机的负荷频率PID控制器参数动态优化模型,并分析了经过优化后控制器调节特性。研究表明：在区域内施加1%扰动条件下,控制器的调节时间约为2s,最大超调为0.0009pu,区域内频率偏置系数变化50%条件下频率最大超调约为0.003 pu,调节时间为2.6s,区域内发电单元调整系数变化50%,区域频率最大超调约为0.001 pu,调节时间约为2.5s。

To further enhance the performance of load frequency closed-loop regulation in multi-area multi-source interconnected power systems, a strategy is proposed to dynamically optimize the controllers of various generating units using the cosine optimization algorithm. The interconnected power system model includes two areas with multiple generating units such as thermal, hydro, and gas turbines. The load frequency control system of an interconnected power system with a total power generation of 2000MW and a load of 1740MW is modeled. The study focuses on using the Integral of Time multiplied by Absolute Error (ITAE) criterion as the optimization constraint function to dynamically optimize the PID controller parameters for thermal, hydro, and gas turbine units in the two-area power system. The adjusted characteristics of the controllers after optimization are analyzed. The research indicates that under a 1% disturbance applied within the area, the adjusted time of the optimized controller is approximately 2s, with a maximum overshoot of 0.0009pu. Under conditions of a 50% change in frequency bias coefficient within the area, the maximum overshoot of frequency is approximately 0.003 pu, with an adjustment time of 2.6s. When the adjustment coefficient of the generating units within the area changes by 50%, the maximum frequency overshoot within the area is approximately 0.001 pu, with an adjustment time of approximately 2.5s.

TK221

江苏省产学研合作项目（BY2022863）