Modeling And Optimization Control Of Thermal-Electric Load Object Of Heat Supply Units

At present,China’s thermal power generator assembly capacity base is still very large.In China’s vast Northeast,North China,Northwest regions,the units that undertake the main power generation tasks are still used Non-renewable fossil fuels such as coal.Although there are abundant wind and light resources in the northern region,and wind farms and photovoltaic farms have been put into use in large quantities,the intermittent and instability of their power generation will inevitably cause gri d fluctuations.Based on this,thermal power generation units are still needed in the northern region of China to regulate the power grid.Therefore,in the absence of hydropower,northern regions use heat storage to improve the speed and stability of winter response load instructions and one frequency regulation instruction,which is beneficial to Security,stability,and economics of the power grid.With the sub-critical and super-critical heating units involved in peak regulation as the main research object,a systematic study is carried out on the optimal control scheme of the heating units.When modeling subcritical and supercritical heating units,based on the dynamic model of pure condensing unit objects,the mechanism of the research object was analyzed,and LV \ EV valves were added.Aiming at the premise of using the heat storage network for optimal control,the heat storage of the heating network is qualitatively analyzed.Finally,the coordinated control of the traditional heating unit was optimized and debugged in the actual heating unit to verify the safety and stability of the coordinated control system.The operating data of the unit was obtained based on the examples.The control system is further optimized to obtain the object parameters,and the SIMULINK module on MATLAB is used to build a coordinated control system model of the heating unit.Characteristic simulation to analyze the control quality of the control scheme under different working conditions.The control scheme in this paper is implemented in BS power plant and KBS power plant.Both have obtained effective control effects.Under conventional and deep-peak peak heating conditions,the unit can respond quickly to load changes.Slow down.The thesis work further summarizes and improves the object models and coordinated control schemes for subcritical and supercritical heating units.