电厂电气主接线在采用GIS后的优化研究

Research into the Optimization of Main Electric Connection Line Using GIS

通过对电厂中实际应用的几种主接线方式的比较,设计理论和工程经验都证明,各种接线方式均具可行性.但在采用GIS装置后,给各主接线带来了新的问题,特别是双母线不分段接线,在机组、出线数量较少的情况下,未必能满足经济性的要求,从而在实际工程的使用中需要有较大的限制.从经济、安全的角度考虑,在系统回路数较少的情况下,先期采用桥型接线,后期再改接成一个半开关接线,是符合工程实际情况的方案之一.

Through the comparison of several kinds of main electric conncetion lines in actual use in power plants, designing theory and project experience both prove the feasibility of the various kinds of connection lines. However, the application of GIS gives rise to some problems to the various main connection lines, especially the possible failure of non-separation bundle bus bar to meet the requirement of being economical when the number of units and the out-lines is small, which leads to its limitation in actual use. In consideration of economy and safety, it is one of the approaches suitable for the actual status of the project to adopt bridge connection lining at the initial stage and then convert to half-switch connection lining when the number of system return-ways is small.