On-Line Identification Method for Critical Buses of Power System Voltage Stability
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摘要: 根据各被监测点相邻区域内节点电流和电压信息,在线计算节点的单电源功率传输等值系统参数,其节点等值负荷仅受局部区域内相关母线节点负荷的影响.在此基础上,将负荷裕度指标拓展到多机系统,实现电网电压稳定性的在线监测.在改进的IEEE 50机测试系统上测试,结果表明,该监测方法能够辨识电压稳定薄弱节点.Abstract: The parameters of an equivalent single source system were computed on-line based on bus voltages and inject currents in the adjacent regions of monitored buses,in which the equivalent loads are affected only by the loads in the surrounding grid.Based on the equivalent model,a load margin index was used to monitor the voltage stability of multi-generator systems.The new voltage stability monitoring method was simulated in the modified IEEE 50 generator test system.The simulation results show that it can identify the critical buses that are prone to voltage instability.
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Key words:
- voltage stability /
- wide area measurement system /
- index /
- identification /
- monitor
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