网架结构对受端电网暂态电压稳定性的影响分析

An Analysis on the Affection of Grid Structure upon Transient Voltage Stability of Receiving-end Grid

八交八直的受电格局下,交直流系统相互影响加剧,作为受端电网的广东电网暂态电压稳定问题更加突出,所面临的安全运行局势更加严峻。从交直流联网方式、线路出串、断线和通道电源等四个方面仿真分析网架结构对受端电网暂态电压稳定性的影响。结果表明:上述四个因素对系统暂态电压稳定性有着重要的影响,需要在电网规划阶段加以考虑,在系统运行阶段合理安排输变电设备和机组的检修,以确保系统的安全稳定运行。

In the 8 AC/8 DC receiving mode, the AC/DC systems have aggravated interaction. Guangdong power grid, as a receiving-end grid, has even more difficulty in maintaining stable transient voltage and is faced with severe situation with regards to safe operation. In the four respects of AC/DC interconnection mode, line crossing, line disconnection and power source in the channel, this paper analyzes tile affection of grid structure upon the stability of transient voltage at the receiving-end grid. The result shows that the above- mentioned four factors have great influence on the stability of transient voltage of the system, which must be taken into account at the grid planning stage. Furthermore, reasonable arrangement of inspection of electric transmission and transformation equipment and machine sets is required at the stage of system operation so as to ensure safe and steady operation of the system.