The Research Of Retrofitting Projects On Generator-transformer Protection Of DouHe Power Plant

For the operation of generating units for many years, protection relays and other components, devices, or the aging of the old, combined with the original configuration is not entirely reasonable to protect the protection, it is difficult to meet the requirements of high sensitivity of modern protective relaying. In order to improve the reliability of transformer protection and sensitivity, the correct action to increase the rate of protection devices, for those who put into operation for many years-transformer unit protection for the dual transformation of microprocessor-based protection is absolutely necessary.In this paper, the microprocessor-based protection on the basis of theoretical research, combined with Douhe Power Plant Unit#3 the actual transformation of microprocessor-based protection projects, aimed at large-scale thermal power units to run for many years to conduct analysis of the protection of transformation. And in accordance with the characteristics of microprocessor-based protection and the protection of principle, the transformation of technical programs and the problems in the transformation process analysis, turn to turn the generator protection, differential protection and so on to improve the program.