EN1000MW超超临界机组调阀快关边界条件分析与应用
Analysis and Application of Fast Closing Boundary Conditions for Governing Valves of 1 000 MW Ultra-supercritical Unit
- 发电技术 2020年41卷第6期 页码：689-696
- 作者机构：
1.西安热工研究院有限公司, 陕西省 西安市 710054
2.中国华能集团清洁能源技术研究院有限公司, 北京市 昌平区 102209
3.国家电投集团河南电力有限公司技术信息中心, 河南省 郑州市 450000
- 作者简介：
[ "宋晓辉(1989), 男, 硕士, 工程师, 研究方向为大型汽轮发电机组的调试及故障诊断, songxiaohui@tpri.com.cn" ]
[ "梁恒(1987), 男, 工程师, 研究方向为大型汽轮发电机组的热工调试与协调优化, lh-3314@163.com" ]
[ "陈新明(1989), 男, 硕士, 工程师, 主要研究方向为火电厂热力系统仿真、风电场流场仿真分析、风电机组性能检测评估等, xm_chen@qny.chng.com.cn" ]
[ "普建国(1979), 男, 工程师, 研究方向为大型汽轮发电机组的调试及故障诊断, pujianguo@tpri.com.cn" ]
[ "廖军林(1979), 男, 工程师, 研究方向为大型汽轮发电机组的调试及故障诊断, liaojunlin@tpri.com.cn" ]
[ "伍刚(1981), 男, 高级工程师, 研究方向为大型汽轮发电机组的调试及故障诊断, wugang@tpri.com.cn" ]
[ "尹金亮(1963), 男, 高级工程师, 研究方向为大型汽轮发电机组的研究及故障诊断, yjl19630520@163.com" ]
- 基金信息：国家重点研发计划项目(2019YFE0100100)
DOI：10.12096/j.2096-4528.pgt.20004
中图分类号： TK38收稿：2020-03-11，
纸质出版：2020-12-31
- 稿件说明：
移动端阅览
宋晓辉, 梁恒, 陈新明, 等. 1000MW超超临界机组调阀快关边界条件分析与应用[J]. 发电技术, 2020,41(6):689-696.
Xiaohui SONG, Heng LIANG, Xinming CHEN, et al. Analysis and Application of Fast Closing Boundary Conditions for Governing Valves of 1 000 MW Ultra-supercritical Unit[J]. Power Generation Technology, 2020, 41(6): 689-696.
宋晓辉, 梁恒, 陈新明, 等. 1000MW超超临界机组调阀快关边界条件分析与应用[J]. 发电技术, 2020,41(6):689-696. DOI： 10.12096/j.2096-4528.pgt.20004.
Xiaohui SONG, Heng LIANG, Xinming CHEN, et al. Analysis and Application of Fast Closing Boundary Conditions for Governing Valves of 1 000 MW Ultra-supercritical Unit[J]. Power Generation Technology, 2020, 41(6): 689-696. DOI： 10.12096/j.2096-4528.pgt.20004.
摘要
某1 000 MW超超临界机组在冷态冲转过程中出现调阀频繁快关动作，造成阀体支撑晃动大，无法继续升速。针对这一问题，试运现场通过调整冲转参数、检查电磁阀油路、重新化验控制油油质等措施仍未得到解决。为此，从转速控制逻辑出发，分析快关动作发生的条件及调阀快关过程中比例积分（proportion integration，PI）调节量的变化，得出快关过程中影响总流量指令（即最终的阀位开度）最主要的因素是转速调节的前馈量变化，而并非是转速PI输出量的变化。依据这一分析，在不改变冲转参数、阀门流量特性曲线的条件下，计算出转速控制前馈量的边界值。通过多次尝试确立前馈量的最优值，避免控制逻辑中因参数设置不合理而触发调阀快关动作。优化后实际转速跟随设定值平稳上升，调阀开度线性开启，不再出现频繁摆动，达到升速控制的要求。
Abstract
The frequent fast closing action of the governing valve in a 1000 MW ultra-supercritical unit occurred during the cold running process
which caused the valve body to sway greatly and could not continue to speed up. The problem had not been solved by governing the impulse parameters
checking the solenoid valve oil circuit
retesting the control oil quality and other measures. Therefore
starting from the speed control logic
the conditions of fast closing action and the change of proportional integral (PI) regulating quantity were analyzed. It was concluded that the main factor affecting the total flow instruction (the final valve position opening) in the process of fast closing is the feedforward change of speed regulation
not the change of PI output. Based on this analysis
the boundary value of feedforward quantity of speed control was calculated without changing the impulse parameters and the flow characteristic curve of the valve. Through many attempts to establish the optimal value of feedforward quantity
the fast closing action of the governing valve can be avoided due to the unreasonable parameter setting in the control logic. After optimization
the actual speed rises steadily with the set value
the valve opening is opened linearly
and there is no more frequent swing
which meets the requirements of speed up control.
关键词
Keywords
references
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