某核电厂主泵变频器故障分析与可靠性提升

Fault Analysis and Reliability Improvement of Variable Frequency Drive for Reactor Coolant Pump in A NPP

我国某三代压水堆机组主泵必须配置变频器,且变频器与主泵长时间同时运行,因而变频器的可靠性对机组的稳定运行和经济效益具有重要意义。本文主要介绍了主泵变频器的可靠性设计,分析了某核电厂1、2号机组变频器历史故障,找出了影响主泵变频器可靠性的薄弱点,提出了相应故障的应对措施和提升可靠性的措施,对国内后续该机型主泵变频器的设计优化、设备制造和运行维护有一定的借鉴意义。

The reactor coolant pump of a third generation nuclear power plant in our country is equipped with variable frequency drive(VFD)and they operate at the same time for a long time.Therefore,the reliability of the VFD is of great significance to the stable operation and economic benefits of the unit.This paper mainly introduces the reliability design of the VFD,analyzes the historical faults of the VFDs used in a nuclear power plant No.1 and No.2 units,finds out the weak points that affect the reliability of the VFD,and puts forward the corresponding countermeasures to faults and measures to improve the reliability of the VFD.It has certain reference for the design optimization,equipment manufacturing and operation maintenance of the VFD used in domestic follow-up units.