摘要
常规的负荷频率控制方法以频率协调为主,调频信号指令受到阶跃响应的影响,存在一定的频率偏差,阻碍火电机组频率控制效果。因此,设计了基于多目标遗传算法的火电机组负荷频率控制方法。提取火电机组负荷一次调频特征,将高出允许合理范围的火电机组负荷频率进行调整,增加或减小机组功率,使其达到新的负荷平衡。基于多目标遗传构建火电机组负荷频率控制模型,以机组发电损失与经济投入作为约束条件,优化汽轮机输出功率阶跃响应速度,从而控制火电机组负荷频率。协调机组负荷频率控制分配因子,将火电机组的前馈变负荷速率进行调节,在不影响机组负荷变化率的基础上,修正负荷频率偏差。采用对比实验,验证了方法的控制效果更佳,能够应用于实际生活中。
The conventional load frequency control method is focused on frequency coordination,and the frequency 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 allocation 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.
作者
关凯
GUAN Kai(CHN Energy Science and Technology Research Institute Co.,Ltd.,Nanjing,Jiangsu Province,210046 China)
出处
《科技资讯》
2024年第2期81-84,共4页
Science & Technology Information
关键词
多目标遗传算法
火电机组
负荷频率
控制方法
Multi-objective genetic algorithm
Thermal power units
Load frequency
Control method
