Influence of Boiler Dynamic Characteristic on Primary Frequency Control of Double-Reheat Unit
Traditional IEEE primary frequency control simulation model lacks fully consideration of boiler dynamic characteristics,this paper takes the ultra-supercritical 1 000 MW double reheat unit as research object,and the primary frequency control simulation model of the unit is established based on the mechanism analysis method,and the dynamic simulation of the double-reheat unit is developed in LabVIEW software to simulate the impact of boiler dynamic characteristics on the unit's primary frequency control.The calculation results show that the simulation mathematical model of the once-through boiler established in this paper comprehensively reflects the dynamic response characteristics of the main steam pressure,flow rate and opening of the control valve in the process of primary frequency control.Due to the thermal inertia of the two-stage intermediate link,the power response speed of the double-reheat unit is greatly slowed,and the release of the energy storage of the boiler is achieved by the drop of the main steam pressure to realize the rapid response of the load,that is,the greater the target power increment,the greater the stored energy release,and the greater the fluctuation of the corresponding main steam pressure.
double-reheatprimary frequency controlboiler energy storagesimulation model
万方数据
维普
