摘要
基于整机试验与仿真,对三轴燃气轮机发电机组突变负载控制策略进行了研究。试验结果表明,改进后的功率前馈加燃气发生器转速串级PID闭环控制方案具有响应速度快、抗干扰能力强和自适应性好的特点,可满足瞬态发电要求。当突增40%负载时,动力涡轮转速下降值不大于4%,恢复时间不超过2 s;仿真结果表明,甩负荷时提前打开低压压气机出口放气阀放气不仅改善了压气机工作裕度,还可以抑制动力涡轮转速的增长,当放气25%时动力涡轮转速超调量与不放气相比下降3%,恢复时间减少10 s。
On the basis of the experiment and simulation of an integral machine,studied were the strategies for controlling the abruptly changed load of a three shaft gas turbine power generator unit. The test results show that the improved power forward feed + gas turbine rotating speed cascade PID closed cycle control version features a quick response,strong anti-interference ability and good self adaptability,thus capable of meeting the needs for transient power generation. In the case of an abrupt increase of a 40% load,the drop in the rotating speed of the power turbine will not be higher than 4% and the recovery time duration will not exceed 2 s. The simulation results show that in the case of load rejection,to open in advance the bleeding valve at the outlet of the low pressure air compressor to bleed air not only can improve the work allowance but also can contain the growth of the rotating speed of the power turbine. When the air quantity bled arrives at 25% of the rated air flow rate,the overshoot of the rotating speed of the power turbine will decline by 3% and the recovery time duration will shorten by 10 s compared with those when no air is bled.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第11期26-31,共6页
Journal of Engineering for Thermal Energy and Power
关键词
突变负载
控制策略
串级
前馈
试验与仿真
abruptly changed load
control strategy
cascade
forward feed
experiment and simulation
