三峡电站发电机励磁系统主要参数设计计算

多年来国内大型电站曾屡次发生发电机励磁系统事故,严重影响电站的安全运行.为了避免类似事故的发生,在三峡左岸电站的设计中,对励磁系统的设计方法及其参数计算选择进行了分析研究,提出了磁场断路器分断能力、灭磁电阻容量、励磁变压器容量及二次侧电压等几个主要参数的设计计算方法.按照该设计计算方法设计的励磁系统,已与发电机组一起在三峡左岸电站投入运行.

Design computation of main parameters of excitation system of TGP's power generator

Failure in the excitation system of power generators at domestic large power stations often take place, seriously affecting the safe operation of these power stations. In order to avoid the occurrence of similar failures, the design methods and the selection of parameter computation of the excitation system were analysed in the design of the left power plant of the Three Gorges Project, and some design and computation methods were put forward for determining main parameters such as the breaking capacity of magnetic field breakers, the capacity of de-excitation resistances, the capacity and the secondary voltage of excitation transformers, etc. The excitation systems designed by these methods have been used in the operation of the left power plant of the Three Gorges Project.