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我厂热电厂有两台50MW 汽轮发电机组,经两台主变电110kV 与华东电网联系,但我厂在皖西南地区,处于华东电网的末端,电力系统故障常迫使热电厂脱网运行。脱网后单机就能满足全厂生产用电,但系统故障也常使一些大型电动机保护动作跳闸,如炼油厂催裂化装置的3200kW 主风机电机,于1986年10月27日晚7点因系统故障,被迫解列脱网运行。于20点起动3200kw 主风机失败,而且由于电压过低波及到化肥厂停机。因此能否在脱网后再起动,以尽快恢复生产,需要做出结论。从理论上讲按发电机、主变容量应该说是没有问题的,但27日却起动失败。为此,1988年1月12日下午利用我厂停工大修期间,在热电厂和炼油厂电气系
Two thermoelectric plants in our plant have two 50MW turbine units, which are connected with Huadong Power Grid through two main transformers of 110kV. However, our plant is in the southwest of Anhui Province and is at the end of East China Power Grid. Power system faults often force thermal power plants to run off-grid. Stand-alone network will be able to meet the full plant production of electricity, but the system failure often make some large motor protection tripping operation, such as the refinery catalytic cracking unit 3200kW main fan motor, on October 27, 1986 at 7 pm due to system Failure, forced to strike off the net run. At 20 o’clock start 3200kw main fan failed, and because the voltage is too low to fertilizer plant downtime. Therefore, it is necessary to make a conclusion if it can be restarted after it has been taken offline to resume production as soon as possible. In theory, according to the generator, the main transformer capacity should be no problem, but failed to start on the 27th. To this end, the afternoon of January 12, 1988 the use of my factory downtime overhaul, in the thermal power plant and refinery electrical system