| Recently,wind power has gained significant attention as a renewable and clean energy source.However,due to its intermittent and volatile nature,combined with the "heat-led" mode of operation of combined heat and power units in "three northern" regions of China,it poses challenges to the stable operation of the power grid and wind power consumption.This research aims to address these challenges by focusing on the combined operation of heat and power and exploring avenues for optimizing performance of the system while maximizing the consumption of wind power.This paper delves into the dynamic characteristics of the heat network,buildings,and the operational aspects of combined heat and power units,electric boilers,and heat storage tanks in the combined electric and heat operation system.To consider the thermal inertia of the district heating system,electrical load demand,and wind power output,a scheduling optimization model is established.This model proposes an optimal scheduling strategy that ensures dependable operations of the electric power system and heat supply system while facilitating the consumption of wind power.To begin with,this paper establish mathematical models for each component of the combined electric and heat operation system and the thermal dynamic characteristics of the heat network based on the principles of energy conservation and mass conservation.Additionally,the paper establish a thermal dynamic model of the building using the set total parameter method to provide the foundation for the subsequent research.Moving on,the paper focus on the heat source side,where consider combined heat and power units,electric boilers,and heat storage tanks as the subjects of study.The paper integrate the relevant constraints of the power system and heat supply system and establish the electric-heat coordinated dispatch model of electric boilers and heat storage tanks with combined heat and power units.Then,optimizing the system under different scenarios to investigate the influence of electric boilers and heat storage tanks on the ability of system to consume wind power.Next,developing a model of the combined electric and heat operation system from the heat network and heat load sides,considering the heat network of the district heating system and the thermal inertia of the building.This paper detail the process of modeling the thermal dynamic characteristics of the heat network.Finally,optimizing the scheduling strategy of the combined electric and heat operation systems,considering the thermal dynamic characteristics of the centralized heating system.This is achieved by comparing and analyzing different scenarios,including those that consider the thermal inertia of the heat network and the buildings,those that consider only one of them,those that consider neither of them,and those that add electric boilers and heat storage tanks to the system.This paper analyze the impact of the optimized system on abandoned wind consumption and carbon emission reduction.In conclusion,through an analysis of the actual heat network structure,the efficacy and viability of the optimized combined electric and heat operation system has been validated in this paper.The research findings offer fresh insights and optimal scheduling strategies for ensuring dependable operations of power systems and heat supply systems,while also enabling the efficient utilization of wind power. |
