Study On The Prediction Method About Peak Regulation Capacity Of Thermal Power Unit

With the more and more gap of electric power between peak and valley and heating unit capacity continually increasing, these bring a lot of difficulties to the power grid about its stability and dispatching, but pure condensing of thermal power plant can not meet the demand of power load. While the new energy power generation unit may not participate in electric power load because of its own characteristics. So as to prevent the phenomenon of abandoned wind in winter heating period Therefore cogeneration units participate in electric power load become serious problem to solve.In this paper, the thermal power unit is the main research object. The peak limiting factor is obtained based on the analysis of the relationship between heat and electric load of different types of heat supply units. a method based on meteorological data for predicting the ability of peak load of heat-supply units was presented,and the feasibility of the method is proved.Firstly, a method based on meteorological data for predicting the ability of peak load of heat-supply units was presented. It is on this premise that the lowest indoor temperature is 18℃。Then heat load of heat consumers are calculated under different outdoor temperatures. The predicted heat load as a condition of peak load regulation.Secondly, the operation condition diagram of the heating unit is function fitted, the fitting method is based on the regression analysis method, and the mathematical relationship between thermal load and power showing in the working condition figure is obtained. Besides, using this fitting function calculates the maximum and minimum power for any rated extraction conditions. And then the load range of the unit is obtained under the extraction of rated working condition.Finally, to improve the shift peak load range of the heat-supply units, the paper comes with a new method of adding a heat accumulator to heating turbine. To make assumptions about unit turning down the heat, heat is provided by the heat accumulator. The requirements of performance capacity and size of heat accumulator were determined through calculating.Through the instance and error analysis, this method is simple, practical and accurate. Assurance the premise to ensure the quality of heating. The peak regulation ranges under different initial conditions are obtained with meteorological data by this method, and the peak range is expanded by adding the accumulator,which can be as a guide for power grid. So, the power grid to absorb more wind power on the basis of the quality of the heat supply, and increasing utilization of wind power.