热力发电2018，Vol.47Issue(5)：131-135,5.DOI:10.19666/j.rlfd.201708136
适应超低负荷运行的汽包水位滤波器
A filter of drum water level suitable for ultra-low load operation
摘要
Abstract
The disturbances of the drum water level in thermal power units become larger under ultra-low load conditions and the control quality become worse under variable load conditions. To solve these problems, this study puts forward a design scheme combining linear multi-scale filtering and nonlinear dead zone filtering. This filter can selectively filter according to the amplitude of high frequency component in original signals. And the inertia filtering time increases under ultra-low load conditions and stable load conditions while it becomes smaller under high load conditions and variable load conditions. The experiment results of drum water level filter in a 600 MW unit show that this filter can effectively filter the disturbances of the drum water level under ultra-low load conditions. Moreover, this filter can change the drum water level from PI control to PID control to meet the needs of the unit deep and rapid peaking operation.关键词
火电机组/汽包水位/滤波器/超低负荷/变负荷/控制品质Key words
thermal power units/drum water level/filtering/ultra-low load/variable load/the control quality分类
能源科技引用本文复制引用
白德龙,刘鑫屏..适应超低负荷运行的汽包水位滤波器[J].热力发电,2018,47(5):131-135,5.基金项目
国家重点研发计划项目(2017YFB0902102) （2017YFB0902102）
National Key Research and Development Program (2017YFB0902102) （2017YFB0902102）
