李家峡水电站机电设计

Mechanical and electrical design of Lijiaxia Hydropower Station

李家峡水电站接入系统与电气主接线按３３０ｋＶ一级电压与５回出线设计，发电机与变压器组合方式采用单元接线，３３０ｋＶ侧采用３／２断路器接线。机组与附属设备方面：水轮机为竖轴混流式，机型为ＨＬＤ２０３－ＬＪ－６０３；发电机为半伞式结构，型号为ＳＦ４００－４８／１２８００；调速器采用并联ＰＩＤ微机电液型；发电机采用自并激静止可控硅励磁，励磁调节器为ＰＩＤ数字式。发电机采用ＨＥＫ６型户内强风冷ＳＦ６断路器。主变选用双线圈三相整体式，型号为ＳＳＰ７－４５００００／３３０。开关站采用户内ＧＩＳ方案。电站采用以计算机监控为主，ＰＬＣ功能子系统为辅的监控模式。机组为双排布置，上游２台下游３台。

In the electric master connection of Lijiaxia Hydropower Station,the switch on system is designed on one voltage of 330kV and 5 outgoing loops and the composition of power generator and transformer is connected by unit wiring.The generating unit and ancillary equipment are as follows:vertical shaft mixed flow turbine of HLD203 LJ 603;semi umbrella type generator of SF400 48/12800;the parallel PID computer electro hydraunc governor,auto exciting static silicon controlled excitation system for generator,PID digital excitation governor;SF6 indoor strong wind cool fuse of HEK6.The main transformer is a double coil three phase integral system with a type of SSP7 450000/330.The switch station is a indoor GIS .The hydropower staion takes computer supervisory control system as main and concurrent with PLC sub system.The generating units are arranged in two rows,that is,two in upstream side and three in downstream side.