含直流馈入的弱受端电网暂态电压稳定预防控制

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...

Transient Voltage Stability Preventive Control for Weak Receiving-end Power Grid with HVDC Infeed

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 system with HVDC infeed was analyzed. A transient voltage stability preventive control optimization model was formulated. 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 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.