Analysis And Research On The By-pass Control System Of The Photo-thermal Power Plant

Vigorously developing new energy is an important part of the current energy strategy.Solar energy resources are the most widely available and convenient,which is the first choice for clean energy.There are two types of solar energy utilization in the power production industry,photovoltaic and photo-thermal generation.Because of the photo-thermal generators have a structure similar to the traditional thermal power unit,in terms of the ability of a wide range of commercial and interconnection,photo-thermal generation technology has more advantages to photovoltaics technology.However,the photo-thermal technology also has its own characteristics,which is affected by the factors such as the heat storage technology and the weather.The thermal units need to start and stop periodically.This has highly requirements for the turbine of the photothermal unit.In the start-up process,the bypass system can shorten the start-up time.Therefore,it is particularly important to design an efficient and applicable bypass system.Through the analysis and study of the bypass control system of the fire unit,to understand the function of the bypass system.Meanwhile,the regulation process of the bypass system is analyzed and the characteristics of the controlled object is also to be understand.On this basis,the design of control logic and control strategy for the secondary bypass system which the high and low pressure bypass is series connected of A groove solar-thermal power stations photo-thermal power plan is carried out.The logic shows that the control of high pressure bypass pressure,high pressure bypass reducing water control,low pressure bypass pressure control and low pressure bypass reducing warm water control are carried out in four parts.Make the learning of the bypass control system applied to the project.Finally,discuss the ways to temperature control.In view of the traditional temperature feedback control way,and by using the thermodynamics formula,and the principle of enthalpy balance calculation to get the flow of reducing temperature water,as the feedback.And get the comparison and analysis of results as the choice of control mode.Optimize the temperature control.