Research and Application of Generation Motor Transformer Unit Protection for Large Pumped Storage Units
According to the characteristics of pumped storage units,the configuration scheme of generator motor transformer unit protection is given.This paper introduces the full working condition protection algorithm based on sampling data source partition,which meets the requirements of the protection algorithm for pumping storage units;A comprehensive judgment method for the working conditions of pumping and storage units is proposed,which includes the introduction of double position auxiliary contacts of electrical switches and monitoring information.At the same time,a state machine mechanism,electrical quantity auxiliary judgment and switch position alarm function are designed to ensure the accuracy and reliability of the working conditions identification of pumping and storage units;The phase sequence protection method is introduced.The developed protection device for pumping and storage unit has been put into use in 300MW pumping and storage unit,and the application effect is good.
pumped storage unitprotection configurationfull working condition protectioncomprehensive identification of working conditionsphase sequence protection
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