Coordinated Operation Strategy Of Combined Heat And Power Microgrid

China is a big energy-consuming country.Its main consumption lies in the two aspects of heat and electricity.Most of the power system and the thermal system are currently operating independently and lack coordination.The connection between the generation,transmission and consumption of electric energy is becoming closer.Union is an effective way to improve microgrid renewable energy consumption and grid stability.With the construction of the smart grid and the continuous improvement of the electrification level,the integration and unified planning of the electric heating system has become inevitable.Therefore,it is of great significance to study the combined heat and power microgrid.Firstly,analyze the purpose and significance of research on combined heat and power systems,The domestic and international research status of the combined heat and power system is analyzed from the development of microgrid,the combined thermoelectric energy system,the energy storage access thermoelectric system and the microgrid target optimization model.Secondly,the topology and basic model of the combined heat and power system are studied.Based on the analysis of the operating mechanism of the combined heat and power micro-grid system,the working principle and output characteristics of each distributed power supply in the micro-grid are studied,and the basic model of the heat source,power supply and electro-thermal coupling equipment is established.Then,combined with the research method of the power system,the power flow research of the thermal system is carried out.The thermoelectric joint micro-grid topology node map is built,and the power flow model of the power network,the thermal network and the thermoelectric coupling device are respectively established.The power flow calculation method is used to calculate the power flow data of the power flow model through known parameters,and compares the advantages and disadvantages with the traditional model.Finally,the coordinated operation strategy and optimization research of the combined heat and power system are carried out.On the basis of the previous analysis,the planning and scheduling of the combined heat and power system is analyzed,and the thermoelectric combined micro-grid economic model is established according to the example.The improved particle swarm optimization algorithm is used to solve the model,comprehensively consider various influencing factors in the system,and combine local renewable Under the premise of meeting the local thermal power load,the predicted power of the energy and the grid electricity price coordinate the output of each unit to obtain the final economic result of the system.