摘要
利用热网储能能够动态改变供热机组发电和供热负荷的比例,从而提高机组快速变负荷能力。根据燃料量和热网储能两者调节速度不同的特点,选择速率限制多尺度分解方法,将负荷指令分为慢变信号和快变信号,将两种信号分别叠加在燃料量指令和汽轮机供热调节蝶阀开度指令上,形成供热侧闭环多尺度前馈协调控制方案。仿真试验结果表明:机组快速变负荷时,相较于带动态前馈的炉跟机控制方案(基本方案),本文方案能够有效减小燃料量波动,从而提高机组变负荷速率;在供热抽汽压力允许变化范围内,本文方案中分解速率越小,越有利于机组稳定运行。
Using energy storage in heat supply net can change the proportion of heat supply units＇ power and heat load thus to enhance the units＇ rapid load regulation ability.Changing the power load by fuel amount costs long time,while by energy storage in heat supply net is fast.On this basis,a rate multi-scale decomposition method was chosen,which could decompose load command into slow-varying signal and fast-varying signal.Adding these two signals on fuel and heat supply regulating valve command separately,a multiscale feedforward coordinated control method with closed-loop heat supply control was obtained.The simulation results show that,when the units＇ load changes fast,the multi-scale feedforward control method can reduce the fuel amount fluctuation effectively.Within permitted heat supply extraction pressure scale,a smaller decomposition rate is benefit to the units＇ stability.
出处
《热力发电》
CAS
北大核心
2016年第3期48-53,共6页
Thermal Power Generation
基金
国家重点基础研究发展计划(973计划)资助项目(2012CB215203)
中央高校基本科研业务费专项资金资助(2015XS62)
关键词
供热机组
热网储能
协调控制
多尺度前馈
燃料量
heat supply unit
energy storage in heat supply net
coordinated control
multi-scale feedforward control
fuel amount
