Study On Improving Peak-shaving Ability Of Heat Supply Units By Using Heat Network And Building Energy Storage

With the progress of science and technology and economic development,the change of power consumption structure is causing the peak-valley difference of load on the power side to increase,and the problem of insufficient peak-shaving capacity is becoming more and more serious.With the increase of the total amount of wind power and other new energy generation connected to the grid,the power grid urgently hopes that heating units will participate in peak-shaving.In order to accept new energy grid-connected to a greater extent,it is necessary to study the peak shaving capacity of heating units.Taking a 300 MW heat supply unit as the research object,the thermal system of the unit is modeled and simulated by using Ebsilon thermal system analysis software.The relationship between the heating extraction steam volume and the unit power is found after the main steam flow is determined by fitting.Combining with the actual building coverage,weather conditions,heating stopping time and typical building structure in the heating area of the heating unit,it is calculated that when the initial stopping temperature is 24 ?,the heating stops at 6 o'clock.In order to maintain the 18 ? required by the state for residential heating,with the changing rule of the peak shaving range of the unit for a long time of stopping,it is analyzed that the heating stops at 6 o'clock when the initial stopping temperature is 24 ?and the peak shaving capacity of heating units from off-heating to recovery of heating will be analyzed.Taking a 300 MW heating unit as the research object,the thermal system of the unit is modeled and simulated by using Ebsilon thermal system analysis software.After determining the main steam flow rate through fitting,the relationship between the heating extraction steam volume and the unit power is found.Combined with the actual heating area of the heating unit,the building coverage area is calculated by an example.Combining with weather conditions,heating stopping time and typical building structure,it is calculated that when the initial heating stopping temperature is 24 ?,the heating stops at 6 o'clock.In order to maintain the 18 ? required by the state for residential heating,it is calculated that the peak shaving range of the unit varies with the length of heating stopping time after stopping heating,and it is analyzed that from interrupting heating to restoring the peak shaving capacity of heating units.