基于灵敏度法的停电系统网架重构过程中负荷调整策略

Load Adjustment Strategy Based on Sensitivity Analysis During Network Reconfiguration of Blackout System

  • 摘要: 电力系统停电恢复过程中需要恢复负荷以平衡发电机出力的增加,但负荷的投入可能造成已恢复节点电压越限,影响恢复过程的安全。本文基于灵敏度法调整负荷分配方案,使各节点电压满足要求。首先对已恢复电网进行灵敏度分析,在潮流计算的基础上,计算电压越限节点与所有负荷节点视在功率变化的灵敏度,对灵敏度最大的负荷节点,根据最大的灵敏度计算要投入的负荷量,将功率平均分配到各负荷节点,循环调用上述方法直至所有节点电压均满足要求。IEEE 39节点系统仿真验证了本文方法的有效性。

     

    Abstract: During power system restoration, it is necessary to restore the load for balancing the increasing output of the generator, but the restoration of load may cause over-voltage of restored nodes, which would affect the safety of power system recovery. In this paper, based on the sensitivity approach, the load distribution scheme is presentedto satisfy the voltage requirements of each node. Firstly, based on the power flow calculation, the sensitivities between the most severityover-voltage node and other load nodes are calculated. The load adjust capacity of the most sensitive load node is calculated according to its sensitivity, which is equal allocated to other load nodes. Above steps will berecalled untilthe voltages of all nodes are security. The validity of the proposed method is verified in IEEE 39-bus testing system.

     

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