Research On Control Of Compound Heating System Based On Wind Power Uncertainty

The problem of wind erosion caused by the uncertainty of wind power output is still outstanding.The study believes that the root causes of wind dissipated are: First,the rapid development of unpredictable wind power and the timely consumption of wind power contradiction,followed by the lack of capacity of the unit’s peak load adjustment.For composite heating systems,to increase the level of uncertainty in wind power,it is necessary to increase the peaking capacity of cogeneration units.The key to the increase in peak shaving capacity lies in the optimization of the control of cogeneration units.In this paper,the study of the problem of unacceptable wind power consumption and control of heating units in the composite heating system is studied.The main research work done is as follows:(1)In order to facilitate the study of the control of cogeneration units,first,on the basis of the load-pressure simplified linear model of the thermal power unit,the generator power load-pre-machine pressure model was improved;secondly,according to the heat energy balance of the cogeneration unit,Build a mathematical model of the thermal part of the cogeneration unit;finally,obtain the non-inertia pressure between the preheating pressure,the power generation load,the fuel flow,the extraction flow,the butterfly valve opening,and the high-profile door opening of the heating unit that reflect the complex operating conditions.Linear dynamic model.According to a typical 300 MW heating unit design data,the static and dynamic parameters of the model are determined.Under pure condensing conditions and heating conditions,the simulation results verify the correctness of the model.(2)Analysis of the thermal inertia of the control system of the cogeneration unit,there is a big time delay for power load response following the conventional control system of cogeneration units,cannot meet the requirements of fast response,not real-time in load problem,and proposes an improved control scheme to solve this problem.The simulation results show that the improved control scheme is better than the conventional control scheme,and the response of generation load response is fast and the following performance is good,which provides a precondition for the cogeneration unit to participate in peak shaving.(3)A composite heating system including wind turbines,cogeneration units,and electric boilers was established.For the current combined heat and power systems,there are no real-time control and coordination control algorithms for each unit in the system.Electric and thermal double-balanced controls have been designed.Algorithm.Considering many advantages of electric boilers,such as high heat transfer rate,regenerative electric boilers are used to participate in thermoelectric load distribution.Finally,a MATLAB/STATEFLOW simulation platform is set up to verify the established micro grid system.The results show that the proposed control algorithm Even if the wind power is uncertain,the problem of wind power dissipation and thermoelectric coupling can be well solved.The control algorithm is feasible and effective.