摘要
远距离跨区直流输电(HVDC)的大规模应用给电力系统安全稳定运行带来了新的挑战。针对HVDC馈入后弱受端交流电网面临的暂态电压稳定问题,提出一种暂态电压稳定预防控制方法。建立以改善弱受端电网暂态电压恢复指标为目标函数,以火电机组有功出力、机端电压、直流输送功率为控制变量的暂态电压稳定预防控制优化模型。基于改进差分进化算法(IDE)求解模型来获取最优控制策略,IDE算法采用反向学习初始化种群和控制参数自适应调整策略,可有效提升种群的全局收敛性。以含HVDC馈入的某省级电网为例进行计算分析,结果验证了所提暂态电压稳定预防控制方法的有效性。
The increasing growth of HVDC transmission system poses new challenges to the secure operation of power systems.The transient voltage stability preventive control optimization for weak receiving-end AC power grid with HVDC infeed was analyzed.A transient voltage stability preventive control method was proposed in this paper.In this model,minimizing the transient voltage recovery index was considered as objective function,active power output,terminal voltage of generators and active power transmitted by HVDC were selected as decision variables.An improved differential evolution(IDE)algorithm was implemented to obtain the optimal control strategy.Initialization of population using opposition based learning and self-adaption of control parameters were introduced to enhance the global convergence of algorithm.The simulation results of actual power grid with HVDC infeed demonstrate the effectiveness of the proposed transient voltage stability preventive control method.
作者
朱瑞金
Zhu Ruijin(School of Electrical Engineering,Tibet Agriculture&Animal Husbandry University,Linzhi 860000,Tibet,China)
出处
《电测与仪表》
北大核心
2022年第3期151-156,共6页
Electrical Measurement & Instrumentation
基金
西藏自治区科技厅重点科研项目(Z2016D01G01/01)。
关键词
直流输电
弱受端电网
暂态电压稳定
预防控制
差分进化
HVDC
weak receiving-end power grid
transient voltage stability
preventive control
differential evolution
