摘要
蒸汽温度控制对提高电厂功率机组的效率、延长使用寿命有着重要作用。为了保持蒸汽温度回路控制性能,传统方法使用最小方差法,但其难以得到控制系统的延时。在实际应用中通常使用扩展时域法来代替最小方差评估方法。例如在湛江300-660 MW火电机组蒸汽温度控制回路中采用了扩展时域法,评估出改进控制策略前后系统的控制性能提升了7.8%。湛江电厂回路评估结果表明,扩展时域法可较好地评估火电机组蒸汽温度控制回路的性能。
Control of steam temperature play an important role in improving lifetime and efficiency of power u- nits. It is very important to keep the efficient and economic of steam temperature control loop. Traditionally it very dif- ficult to get the control system time delay when use minimum variance method. So instead of minimum variance as- sessment method, the extended horizon performance method is widely used in industry environment. This method has been applied to steam temperature controllers for 300 -660 MW fossil-fuel control system in ZhanJiang Power Grid. The assessment results show that control performance index has improve 7.8% after improve control strategies. The assessment results of ZhanJiang Power Grid show that the extended horizon performance method is a good way to evaluate the steam temperature control loop of thermal power unit.
出处
《电子科技》
2016年第8期133-135,139,共4页
Electronic Science and Technology
关键词
控制系统性能评估
蒸汽温度控制
AR模型
最小方差
扩展时域法
control loop performance assessment
steam temperature control
autoregressive model
minimum variance
extended horizon method
