江西省大余县大合35千伏变电站为1999年“一二期”农改期间的典设变电站,经历近十年的运行,设备陈旧老化,运行可靠性低、故障较多。2009年初正式列项为国家拉动内需农网扩增工程,进行数字化变电站改造。2009年6月大合35千伏变电站设计开始至2010年2月11日投运,历经8 Dayu 35kV substation in Dayu County, Jiangxi Province is a typical substation during the “12th” and “Agricultural Reform” period in 1999. After nearly a decade of operation, the equipment is aged and aged, with low reliability and more faults. In early 2009 formally listed as the national stimulating domestic demand for rural power network expansion project, the transformation of digital substations. In June 2009, the design of 35kV substation was put into operation on February 11, 2010, after 8