110kV并网电源对暂态稳定影响分析

Analysis on influence of 110 kV power supply calculation network to power system transient stability

为分析110 kV并网电源对电网安全稳定影响,提出构建考虑110 kV并网电源计算网络的原则,通过建立模拟简单2区域电网,从机理上分析使用考虑110 kV并网电源计算网络与使用220 kV及以上电压等级计算网络得到不同暂态稳定计算结论的原因。通过构建湖南电网考虑110 kV并网电源计算网络,并开展牌长Ⅰ,Ⅱ与艳宗Ⅱ线外送功率极限计算,表明考虑110 kV并网电源计算网络对暂态稳定水平有较大提高,建议使用考虑110 kV并网电源计算网络开展稳定计算。

To analyze influences of 110 kV power supply on safety and stability, principles of constructing calculation network including 110 kV power supplies are presented. The different results of transient stability are explained based on 110 kV and low calculation network and 220 kV and above calculation, through simulating simple 2-area power network. Then calculation network of Hunan power system including 110 kV and low power supply is constructed. And the transmission limit of section made of Paiehang Ⅰ Ⅱand Yanzong Ⅲis calculated. The result shows that the transient stability based on calculation network including 110 kV and low supplies is improved. It is suggested that the stability calculation should be conduceted based on 110 kV and above power supplies calculation network.