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作 者:游文霞[1] 周子恒[1] 陈磊[2] 王阳光[3]
机构地区:[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]清华大学电机工程与应用电子技术系,北京100084 [3]湖南省电力公司,湖南长沙410007
出 处:《电网与清洁能源》2016年第3期18-24,共7页Power System and Clean Energy
基 金:国家自然科学基金项目(51377002);国网湖南省电力公司科技项目(SGHN0000DKJS1300221)~~
摘 要:基于湖南电网规划数据,采用电力系统分析综合程序,从直流闭锁时湖南电网频率、潮流、功角和电压的变化、以及直流受端发生交流系统接地故障时部分参数变化等方面,探讨了酒泉—湘潭±800 kV直流线路和湖南受端交流系统间可能存在的相互影响。结果表明:若发生直流闭锁,湖南电网未超出正常运行条件下频率偏差限值,湘鄂联络线的岗市—葛换线路出现过载问题,省内发电机未出现功角失稳,湖南换流站的交流母线出现过电压;直流线路受端的交流系统若发生接地故障,由此引起连续换相失败并带来直流闭锁的可能性不大。To figure out the mutual impacts the ±800 kV Jiuquan-Xiangtan UHVDC power transmission system and the receiving-end system in Hunan) have on each other, the frequency of the Hunan power grid,the load flow of tie lines between Hunan and Hubei,the voltage of the AC bus near the end of UHVDC transmission line in Hunan,and the power angle of every generator in Hunan after the block happens have been studied together with the working condition of the UHVDC when grounding faults occur in AC system near the end of UHVDC system in Hunan. The results of the study suggest that the frequency stability and rotor-angle stability of the Hunan power grid can still be maintained. However,the tie line between Gangshi in Hunan and Gezhouba in Hubei suffers from an overload problem, and the AC bus of the converter station in Hunan suffers from an over-voltage problem. If grounding faults occur in the AC system near the end of UHVDC transmission line in Hunan,the chances that continuous commutation failures lead to the block of the DC line is not high.
分 类 号:TM712[电气工程—电力系统及自动化]
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