Simulation Research Of Wind Power And Heating Network Joint Energy Supply

With the depletion of fossil energy and the worsening of the environment,the development of new energy and clean energy has been paid more and more attention,because of its unique advantages,wind energy has become one of the most used energy sources at present.Most of the research on wind energy is now confined to wind power generation,but the research on the direction of "wind power heating" is not mature,and most of the research is focused on regional analysis,or only focus on the unilateral control of heat / electricity,and the integrated energy system is one of the most popular research topics at the moment.Therefore,the simulation of the combined energy supply system of wind power and heat network is studied in this paper,and through real time real time emulator(UREP)for real time verification to enhance the reliability and practicability of the subject research.Firstly,the structure and working principle of the wind power generation system are analyzed in this paper,and conduct the study of direct drive permanent magnet wind power generation system with back-to-back double PWM variable flow system,among the control strategy of the converter,using maximum wind energy tracking control for motor side,that is control of pitch angle and speed control,using Vdc-Q /Vf control on the side of the net;Then a brief overview of the structure and working principle of the heat network system is made,and based on the idea of modular modeling,the mathematical model and simulation model of each component are built,it is included electric heaters,heat storage tanks,pipes,radiators,users,circulating water pumps,nodes and so on modular,and the control strategy of the heat network system is also introduced,it is divided into constant temperature control,constant flow control and water supply constant pressure control;Then introducing the working mode of the combined system of wind power and heat network,it is divided into two kinds: "power determined by heat" and " heat determined by power",the former wind power system working in the state of grid,using the Vdc-Q control on the inverter side,through giving the parameters of a heat network,the electrical powerof the heat network system is required can be get after the control link,and it is used as a given value to input the grid system as the input value of dynamic load,thus,the output power of the power grid corresponds to the required power of the heat network,the heat network system can work in a given state;The latter wind power system working in the operating state of the off network,using the Vf control on the inverter side,adding heat storage unit to heat network system under this model to balance the influence of the fluctuation of wind speed on the system;Finally,setting up the simulation model of the wind power system and the heat network system respectively based on the MATLAB/Simulink,and combined the two systems in accordance with the two modes of work described,Completing the real time simulation of real time emulator finally.Due to the difference between the time scale of the wind power system and the heat network system,two real time emulators are used to simulate it in real time in this paper,one of using the small step long run wind system,the other using large step long run heat network system,two emulators are connected through an Ethernet switch,then the simulation variables can be exchanged in real time,the experimental results show that the combined system of wind power and heat network can achieve the interaction of variables and a stable supply of energy for users in this paper.