疆南750kV电网延伸前后电源故障低电压问题分析  

Analysis on Low Voltage Caused by Power Failure before and after Expansion of 750 kV Power Grid in Southern Area of Xinjiang

作　　者：辛超山 吕盼 张增强 宋新甫 付高善 

机构地区：[1]国网新疆经济技术研究院,新疆乌鲁木齐830047

出　　处：《四川电力技术》2016年第3期45-48,84,共5页Sichuan Electric Power Technology

摘　　要：疆南电网位于新疆电网南部，网架结构薄弱，网内支撑电源较少，预计2015年年底750 kV主网延伸至疆南电网。主要分析疆南电网电源发生故障跳机后对疆南电网的影响。分析结果表明，喀发3期机组故障对疆南电网影响较大，故障时暂态电压跌幅达到30～60 kV，电压跌落严重，电网抗风险能力差，严重依赖稳控装置。南部750 kV网架补强后，疆南、阿克苏地区短路容量水平均大幅提升，南部750 kV库车—喀什工程建成后电网抗风险能力明显提升，南部750 kV网架补强后喀发3期电厂机组具备大功率运行的能力。Southern Xinjiang power grid is located in southern area of Xinjiang power grid , its grid structure is weak and it has less support power network , its 750 kV main grid is expected to be extended to southern Xinjiang power grid by the end of 2015.The impact after a fault trip in southern Xinjiang power grid on its own power grid is analyzed .The analysis results show that the failure of third stage units in Kashi Power Plant has a greater influence on southern Xinjiang power grid , at that time the transient voltage declines to 30~60 kV during the failure , the voltage drop is severe , the anti-risk ability of power grid is poor , and it heavily depends on the stability control device .After the reinforcement of 750 kV power grid in southern area , the short-circuit capacity levels are significantly improved in southern Xinjiang and Aksu prefecture , after the completion of 750 kV Kuche-Kashi project , its ability to resist the risks has improved significantly , and after the reinforcement of 750 kV southern grid , the third stage units of Kashi Power Plant have the ability to run with high power .

关 键 词：疆南电网 机组故障 低电压分析 

分 类 号：TM72[电气工程—电力系统及自动化]