火电机组蒸汽温度控制系统性能评估  

Performance Assessment of Thermal Power Unit Steam Temperature Control System

作　　者：洪晋生 王亚刚[1] 李晓枫[2] 

机构地区：[1]上海理工大学光电与计算机工程学院,上海200093 [2]广东电网公司电力科学研究院,广东广州510080

出　　处：《电子科技》2016年第8期133-135,139,共4页Electronic Science and Technology

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.

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 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]