140MW机组调节系统的改造

Reconstructing the Governing Systemof 140 MW Power Generation Sets

国内125 MW机组增容改造的同时,都同步实施调速系统改造,以提高机组控制系统的水平及安全可靠性。介绍了华电国际十里泉发电厂5台125 MW机组增容至140 MW及调节系统改造中的5种方案的特点及利弊;并比较了高压抗燃油及低压透平油2种电调方案,最终选择高压抗燃油纯电调方案,改造后运行情况良好。

Simultaneously with reconstructing the 125 MW sots operating in this country, for output enlargement, their speed governing systems have also been reconstructed, for raising the technical level of the sots＇ control system, as well as their reliability and operational safety. How the output of five 125 MW sets in Huadian International Shiliquan Power Plant were enlarged to 140 MW are described, together with a discussion of the particularities as well as the pros and cons of 5 different reconstruction versions of their governing system, accompanied by a comparison between the application of high pressure fire resistant fluid and low pressure turbine oil. The result was the option of pure electro-governing, coupled with the use of high pressure fire resistant fluid. Operational behavior after reconstruction has been satisfactory.