直流逆变站动态无功源的电压稳定控制优化

Voltage Stability Control Optimization of DC Inverter Station Dynamic Reactive Power Source

直流逆变站电压系统不稳定会导致整个电力系统丧失稳定性,造成的经济损失和社会影响极大。目前使用的直流逆变站动态电压稳定系统对电压崩溃导致电压不稳和功角失恒导致电压不稳的情况不能及时计算出结果,导致电压调节稳定时间较长。提出一种直流逆变站动态无功源的电压稳定控制方法,通过建立动态负荷模型,对直流逆变站输电和配电系统的动态电压控制,及时发现电压无功源振荡阻尼,进行动态模型参数修正暂态稳定控制和电压闪变控制。降低了系统对电压稳定调节时间。仿真实验表明,动态无功源电压稳定控制方法缩短了直流逆变站电压动态调节缩短了时间,改善了动态调节过程,系统震荡得到有效控制,负荷电压稳定,符合应用要求。

Instability of the DC inverter station voltage system leads to the loss of stability in the power system,causing great economic losses and social impacts. The DC inverter station dynamic voltage stability system currently used can not calculate the voltage instability caused by both voltage collapse and power angle loss in time,resulting in a prolonged voltage stability duration. This paper proposes a new voltage stability control method of DC inverter station dynamic reactive power source. Through the establishment of the dynamic load model and dynamic voltage control of the transmission and distribution system of the DC inverter station,the the source of voltage reactive power oscillation damping can be found quickly,and the transient stability control and voltage flicker control can be carried out,thus the adjustment duration of voltage stability by the system is reduced. Simulation experiments show that the dynamic reactive power source voltage stability control method shortens the voltage dynamic adjustment duration for the DC inverter station,and improve the dynamic adjustment process,and controls the system shock effectively,leading to stable load voltage and meeting the requirements of the application.