水电站复式整流型操作电源存在的问题和改进意见

电力系统突然解列，操作电源随即消失，给机组控制、事故照明、机组起励等带来的影响，是水电站复式整流型操作电源设计中尚未解决的技术难题。根据木瓜山水电站的实际，提出了利用永磁机弥补上述缺陷的改进设计方案，具有设计简洁、投资省、等特点，并提出了水电站机组的运行可靠性。

Problems in the Design of Duplex-Commutated Operational Power Supply and an Their Improvement

A sudden deparalleling from the power system and the consequent interruption of the operational power supply will effect negatively on the generator unit control, emergency lighting and generator unit excitation. This is one of the difficult problems existing in the design of duplex-commutated operational power supply that have not been solved completely. According to the actual situation of Mugua Hydropower Station, this paper proposes an improved design scheme which uses the permanent-magnet machine as the alternative. The improved scheme has proved to be easy for design, cost-efficient and convenient for maintenance, which enhances the operational reliability of generator unit greatly. [