CAJ | 학술논문

针对某超临界600 MW机组锅炉煤质变化、磨煤机一次风量测量不准确，使得锅炉负荷难以自动控制的问题，在分析给煤量跟踪给水流量和给水流量跟踪给煤量2种锅炉负荷控制策略的基础上，采用在控制中增加煤质自校正功能的方法，对给水流量跟踪给煤量锅炉负荷控制策略进行了优化.实际应用结果表明，在自动发电控制(AGC)方式且机组大幅度变负荷工况下，锅炉负荷控制系统能够以1．0~1．5％/min的速率响应AGC指令，并将主蒸汽压力、温度控制在±0．4 MPa和±4℃内，满足DL/T 774—2004标准的要求.
침대모초림계600 MW궤조과로매질변화、마매궤일차풍량측량불준학，사득과로부하난이자동공제적문제，재분석급매량근종급수류량화급수류량근종급매량2충과로부하공제책략적기출상，채용재공제중증가매질자교정공능적방법，대급수류량근종급매량과로부하공제책략진행료우화.실제응용결과표명，재자동발전공제(AGC)방식차궤조대폭도변부하공황하，과로부하공제계통능구이1．0~1．5％/min적속솔향응AGC지령，병장주증기압력、온도공제재±0．4 MPa화±4℃내，만족DL/T 774—2004표준적요구.
In a supercritical 600 MW unit,the coal quality changes and the primary air flow measurement of the coal mill is inaccurate,so the boiler load can not be automatically controlled.Against this problem,two boiler load control strategies were analyzed,the feed coal following the feed water mode and the feed water following the feed coal mode.On this basis,a boiler load control strategy with coal quality automatic cali-bration function was applied to optimize the feed water and feed fuel system.The results show that,in au-tomatic generation control (AGC)mode with large load variations,the boiler load control system can re-spond the AGC load demand with speed of 1 .0~1 .5%/min,and can constrain the main steam pressure and temperature controlling error within ±0.4 MPa and ±4 ℃ respectively,which meets the corresponding target aim in the DL/T 774—2004.