自适应振荡闭锁判据的实现

IMPLEMENTATION OF THE SELF-ADAPTIVE BLOCKING CRITERION OF POWER SWINGS

探讨了在实际可能的系统运行工况和振荡模式下,采用“圆套圆”自适应振荡闭锁判据时,振 荡轨迹在内圆停留的时间与跨越时差比值的实际最大值,在此基础上提出了一套完整的自适应振 荡闭锁新策略。最后通过EMTP仿真实验验证了新方案的有效性。

This paper investigates the possible maximum rate of the time of the apparent impedance locus staying in the inside circle and the time difference when the locus passing through the concentric circle in the condition of possible system operation and power swing modes. Based on the result of the investigation, a complete self-adaptive power swing blocking strategy is proposed. Furthermore, the effectiveness of the proposed novel scheme is verified through the results of EMTP simulations.