热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
10期
100-102,115
,共4页
锅炉%低 NOx 燃烧%过热蒸汽温度%控制系统
鍋爐%低 NOx 燃燒%過熱蒸汽溫度%控製繫統
과로%저 NOx 연소%과열증기온도%공제계통
boiler%low NOx combustion%superheated steam temperature%control system
锅炉过热蒸汽温度过高或过低都会影响电厂的安全性和经济性，且过热蒸汽温度的控制具有大迟延、扰动因素多、控制精度和稳定性要求高的特点.针对某亚临界2×600 MW 机组实际运行参数及其锅炉低氮燃烧改造后的过热蒸汽温度特性，对过热蒸汽温度控制策略进行了优化.优化后在机组调峰频繁工况下，控制系统将过热蒸汽温度波动范围控制在±4．5℃以内，控制系统调节品质明显提高.
鍋爐過熱蒸汽溫度過高或過低都會影響電廠的安全性和經濟性，且過熱蒸汽溫度的控製具有大遲延、擾動因素多、控製精度和穩定性要求高的特點.針對某亞臨界2×600 MW 機組實際運行參數及其鍋爐低氮燃燒改造後的過熱蒸汽溫度特性，對過熱蒸汽溫度控製策略進行瞭優化.優化後在機組調峰頻繁工況下，控製繫統將過熱蒸汽溫度波動範圍控製在±4．5℃以內，控製繫統調節品質明顯提高.
과로과열증기온도과고혹과저도회영향전엄적안전성화경제성，차과열증기온도적공제구유대지연、우동인소다、공제정도화은정성요구고적특점.침대모아림계2×600 MW 궤조실제운행삼수급기과로저담연소개조후적과열증기온도특성，대과열증기온도공제책략진행료우화.우화후재궤조조봉빈번공황하，공제계통장과열증기온도파동범위공제재±4．5℃이내，공제계통조절품질명현제고.
Overhigh or overlow superheated steam temperature in boiler will significantly affect safety and e-conomy of power plants.The superheated steam temperature control system has such characteristics as large delay,multiple disturbance factors and high requirements for control precision and stability.On the basis of the actual operation parameters and superheated steam temperature characteristics of a sub-critica1 600 MW unit boiler after low NOx combustion transformation,the superheated steam temperature control strategy was optimized.The improved control system can regulate the superheated steam temperature fluc-tuation within ±4.5 ℃,indicating the control quality of the system has been dramatically enhanced.
