浙江电力

2022, v.41;No.319(11) 92-98

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基于补汽阀的一次调频优化技术研究
Research on primary frequency control optimization technology based on overload valve

金宏伟,宋佳辉,张新胜,谢昊旻,丁宁
JIN Hongwei,SONG Jiahui,ZHANG Xinsheng,XIE Haomin,DING Ning

摘要(Abstract):

针对某台配备0号高压加热器与补汽阀的1 050 MW超超临界机组在部分工况下一次调频功能不足的问题,对该机组一次调频功能进行分析与研究,设计了基于不同负荷工况下补汽阀参与一次调频的新模式。在电网频率动作区间,重新对DEH(汽轮机数字电液控制系统)高压调阀及补汽阀的流量指令进行分配,通过不同负荷段、不同频差工况下的一次调频试验总结出补汽阀的活动区间,并对转速不等率、汽轮机振动、0号高加抽汽温度等条件进行约束,保证补汽阀参与一次调频动作期间机组工况稳定。同时,通过各工况下实际负荷、DEH总流量指令、高压调阀开度等参数的对比,提出DEH负荷控制器积分饱和的问题,并进行优化,保证了机组一次调频的良好性能。
In view of the insufficient primary frequency control of a 1050 MW ultra-supercritical unit equipped with No.0 high-pressure heater and overload valve under some working conditions,the primary frequency control function of the unit is analyzed and studied. A new mode of the primary frequency control based on overload valve under different load conditions is designed,which redistributes the flow command of the DEH(digital electro-hydraulic control system)high-pressure regulating valve and overload valve according to the power grid frequency action interval. Through the primary frequency control test under different load sections and different frequency difference conditions,the active range of the overload valve is obtained,and the conditions such as speed governing droop,turbine vibration and extraction temperature of No.0 high-pressure heater are constrained to ensure the stable working condition of the unit during the overload valve participating in primary frequency control. At the same time,through the comparison of the actual load,DEH total flow command,high-pressure regulating valve opening and other parameters under various working conditions,the problem of the integral saturation of the DEH load controller is proposed and optimized to guarantee the performance of primary frequency control of units.

关键词(KeyWords): 一次调频;补汽阀;积分饱和
primary frequency control;overload valve;integral saturation

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 金宏伟,宋佳辉,张新胜,谢昊旻,丁宁
JIN Hongwei,SONG Jiahui,ZHANG Xinsheng,XIE Haomin,DING Ning

DOI: 10.19585/j.zjdl.202211014

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