摘要
对链式结构的小水电汇流站在送出通道故障时容易造成全站失压的问题进行了研究。在防止全站失压的方案中,要避免非同期并列和带多条线路、多台变压器,乃至带甩负荷停机但未解网的发电机重合可能带来的对电网、设备的冲击。提出采取解列重合闸,先解列小水电再重合的基本思路,给出了出线线路保护重动联跳解列、高周解列等多套解决方案。分析了不同运行方式、不同故障点、不同故障线路、不同故障类型下方案的适应性。探讨了用水电站维持汇流站不失压的可能性,给出了解决小水电汇流站链式送出结构在送出通道故障时,保留发电机调速器性能优越的电站、解列其他电站以确保汇流站不失压,并实现快速自动恢复电网的优化解决方案。
The entire voltage loss caused by the outlet line failure is studied for the chain-structured afflux station of small hydros.To prevent it,the impact of the asynchronous paralleling on grid and devices should be avoided,as well as the reclosing with lines,transformers,and even shutdown generator,which is off-loaded but still connected with grid.The concept of ＂reclosing after separation＂ is put forward,which separates the hydros first and re-closes then the lines.The solutions are given,such as the reclosing separation,the high-frequency separation,etc.and their adaptability to different operating modes,fault points,fault lines,fault types is analyzed.The possibility of maintaining the voltage of afflux station during its outlet line failure is discussed and the optimal solution is given： separate all stations except one with the best speed governor to maintain the station voltage and realize the fast automatic grid recovery.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第6期143-147,共5页
Electric Power Automation Equipment
关键词
汇流站
小水电
全站失压
链式结构
解列重合闸
检同期
甩负荷
调速器
afflux station
small hydro power
entire voltage loss
chain structure
separation-reclose
sync check
load rejection
speed governor
