中国电机工程学报2024，Vol.44Issue(9)：3553-3562,中插18,11.DOI:10.13334/j.0258-8013.pcsee.222919
水电单元机组折线调节方法
Optimal Polylinear Positioning Law applied for Hydropower Turbine Control
摘要
Abstract
As a typical non-minimal phase(NMP)system,the hydropower turbine could hardly keep up with varying loading commands in the first place to contribute its positive part for grid-plant coordination;while on the contrary,the undershoot caused by NMP leads to amercement on a frequent basis.Advanced control strategies introduced with proved functionalities by simulation have their difficulties in carrying out on-site with reasonable cost of deployment,which lights up a much more easier way of analytic models for online control.Simplified as rigid pipe with straight conduit and penstock,a mathematical model for a three-moment definition during the course of load undershoot,includes power inflection moment,power and its integral zero-crossover moment,is proposed and deduced in the analytic way.In light of the analytic expression of these time scales,we can assess their influence on the overall load changing process for a given water starting time and guide vane moving rate,which paves the way of getting optimal control trajectory with minimal undershoot and later overshoot.Polyline consisting of different optimal inflected straight lines is then proposed.Comparison with straight line control,which is the exception of polyline,as well as inner module control tuned PID control,shows the validity and advantage of polylinear positioning law control,and encourages the site application of this approach.关键词
水电调节/机网协调/解析/反调/非最小相位/折线调节/柔性控制Key words
hydropower unit regulation/grid-plant coordination/analytic analysis/undershoot/non-minimalphase/polylinear positioning law/flexible control分类
能源科技引用本文复制引用
周宇阳,郭俊鑫,李伟,董利江..水电单元机组折线调节方法[J].中国电机工程学报,2024,44(9):3553-3562,中插18,11.基金项目
国家能源集团科技基金专项项目(GJNY-20-186) （GJNY-20-186）
国家电网新疆电力公司(D230DK20033). Project Supported by the Science and Technology Fund,China Energy Group(GJNY-20-186) （D230DK20033）
Science and Technology Fund,State Grid Xinjiang Power Company(D230DK20033). （D230DK20033）
