摘要
±660 kV银东直流输电工程建设并供电后,青岛电网区域型500/220 kV高低压电磁环网更加复杂,部分线路因成为安全隐患而需要断开。分析500 kV线路开断引起220 kV系统过负荷等电磁环网的安全隐患,得出判断电磁环网是否开环应考虑的安全稳定性和经济性等因素,和判断500/220 kV电磁环网是否应该开环的一般步骤。并对青岛电网进行了详细分析,阐述分析结果的应用价值和现实意义。
With the development of ±660kV Yindong HVDC transmission project,electromagnetic loop of 500 kV/220 kV in Qingdao becomes more complicated.Some transmission lines should be opened because of security risk.The insecurity of 220 kV grid overload caused by opening the 500 kV transmission line is analyzed.The security and stability of power grid,as well as the economic factors,should be considered before breaking the electromagnetic loop.The general procedure of judging whether the electromagnetic loop should be opened is proposed.Qingdao power grid is analyzed in detail,and the applied value and practical significance are verified.
出处
《山东电力技术》
2015年第2期50-53,75,共5页
Shandong Electric Power
