The Research And Realization Of The State Evaluation Of Equipments On The Power Plant

With the power industry developing , states evaluation to the equipment are needed more and more by power plant. Mastering the states of the equipment is important referrence to operate the unit and to instruct prediction maintenance and to distribute load between multi-unit. This dissertation researches the method of evaluation of generating electricity according as the parameters of equipments and index of ecaluation.Firstly, after Looking backward the birth and development of the gaults diagnosis and states monitoring, this dissertation introduce the meaning and application of states evaluation and explain the relation between states evaluation and states monitoring , gaults diagnosis. To the SIS, this dissertation introduces its function and development actuality.Secondly, this dissertation expatiates on the evaluation system to the equipm of power plant. It evaluates the equipments of power plant through single equipment, equipments troop, uint, and bring on the evaluating method and model. To the characters of equipments of generating electricity, the states of equipments are evaluated through the analysis of parameters of equipments and evaluating model. Then, it brings about the principals and demands of equipments of generating electricity state evaluation, creates the comprehensive evaluation indexes systems for equipments of generating electricity. According to the functions and operating characters of the different equipments in the generation unit, the weights of the indexes and operating scale of equipments of generating electricity are confirmed.Thirdly, to the heaters, the fans, the pumps, the condensers, the mills of power plant, the dissertation expand evaluation indexes and model according to the functions characters and familiar fault. Especially, this dissertation discusses evaluation indexes and model of heaters and fans. To the heater, it puts forward clean coefficient and difference in temperature of drain as evaluation indexes. Through amending the heat-echanging coefficient, it can get clean coefficient, which relates to equipments merely. Then, based on quantity of heat, it can get difference in temperature of drain, which is an evaluation index to leak of the heaters. They can show the states of the heater exactly. Bases on function parameters and characteristic curve of the fans, it can get efficiency and pressure difference of the fans. They can show the states of the fan exactly.Finally,the comprehensive evaluating model and method proposed in this paper are used in SIS system of the power plant. Then, the framework and complexion of SIS system on power plant is introduced. Finally, bases on dataes of the power plant and design of equipments, the results of evaluation to the heaters and fans are analysed. After this, the dissertation analyses the births of errors and influence of errors.