Load Frequency Control Method for Thermal Power Units Based on Multi-Objective Genetic Algorithm
The conventional load frequency control method is focused on frequency coordination,and the fre-quency modulation signal command is affected by the step response,resulting in a certain frequency deviation,which hinders the frequency control effect of thermal power units.Therefore,a load frequency control method for thermal power units based on the multi-objective genetic algorithm is designed.The primary frequency regulation characteristics of the load of thermal power units are extracted,the load frequency of thermal power units that is higher than the allowable reasonable range is adjusted,and the power of units is increased or decreased to achieve a new load balance.Based on the multi-objective genetic algorithm,a load frequency control model for thermal power units is constructed,the step response speed of steam turbine output power is optimized with the generation loss and economic input of units as constraints,so as to control the load frequency of thermal power units.The al-location factor of the load frequency control of units is coordinated,the feedforward variable load rate of thermal power units is adjusted,and the load frequency deviation is corrected without affecting the load change rate of units.By comparative experiments,it is verified that the method has better control effect and can be applied in real life.
Multi-objective genetic algorithmThermal power unitsLoad frequencyControl method
NETL
NSTL
万方数据
维普
