昆明电网的N-1校验及分析

N-1 Check and Analysis of Kunming Power Grid

昆明电网的用电量几乎占到了云南电网电量的一半,作为云南电网的负荷中心,在西电东送中要承担大规模的穿越功率,因此,昆明电网的安全、可靠运行对云南电网和西点东送有着十分重要的意义.论文以电力系统综合仿真程序(BPA)为仿真工具,对2006年丰大运行方式下昆明电网110kV及其以上电压等级进行了N-1校验.仿真研究表明,有53条支路的开断会引起电网解列,占总的开断支路数的22.37%;N-1开断会造成51条母线电压越限,占总开断支路数的21.51%.

The power demand of Kunming Power Grid accounts for nearly half of that of Yunnan Power Grid. As the load center of Yunnan Power Grid, it has to bear large traversing power in the electricity transmission from the west to the east, so the safe and reliable operation of Kunming Power Grid is of great significance to Yunnan Power Grid and the electricity transmission from the west to the east. N - 1 check is conducted for the voltage of 110 kV and above of Kunming Power Grid through the Bonneville Power Administration （BPA） in 2006. The simulation study shows that the outage of 53 branch circuit will cause power system splitting, accounting for 22. 37% of all the open circuits; N - 1outage will cause over - limit voltage of 51 bus - bars, accounting for 22.37% of the total open circuits.