热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
8期
94-97
,共4页
主蒸汽温度%延迟抑制%复合控制结构%加权%冲量%Smith预估补偿器
主蒸汽溫度%延遲抑製%複閤控製結構%加權%遲量%Smith預估補償器
주증기온도%연지억제%복합공제결구%가권%충량%Smith예고보상기
main steam temperature%delay inhibition%composite control structure%weighted%impulse%Smith predictive compensate confroller
针对发电机组主蒸汽温度被控对象纯迟延、时变、不确定的特性,基于误差分析,提出了一种基于延迟抑制控制结构的主蒸汽温度控制策略,将基于非精确模型的闭环输出和系统实际输出加权作为冲量构成新型的控制结构,并将其与 Smith 预估补偿器相结合形成复合控制结构,从理论上分析了复合控制结构的鲁棒性。在机组负荷分别为37%、50%、75%、100%4种工况下,将复合控制结构与Smith 预测补偿控制结构进行仿真比较。结果表明,采用复合控制结构解决了模型参数小范围时变问题,复合控制结构阶跃响应的控制效果明显优于Smith预测补偿控制结构,提高了系统抗迟延性能。
針對髮電機組主蒸汽溫度被控對象純遲延、時變、不確定的特性,基于誤差分析,提齣瞭一種基于延遲抑製控製結構的主蒸汽溫度控製策略,將基于非精確模型的閉環輸齣和繫統實際輸齣加權作為遲量構成新型的控製結構,併將其與 Smith 預估補償器相結閤形成複閤控製結構,從理論上分析瞭複閤控製結構的魯棒性。在機組負荷分彆為37%、50%、75%、100%4種工況下,將複閤控製結構與Smith 預測補償控製結構進行倣真比較。結果錶明,採用複閤控製結構解決瞭模型參數小範圍時變問題,複閤控製結構階躍響應的控製效果明顯優于Smith預測補償控製結構,提高瞭繫統抗遲延性能。
침대발전궤조주증기온도피공대상순지연、시변、불학정적특성,기우오차분석,제출료일충기우연지억제공제결구적주증기온도공제책략,장기우비정학모형적폐배수출화계통실제수출가권작위충량구성신형적공제결구,병장기여 Smith 예고보상기상결합형성복합공제결구,종이론상분석료복합공제결구적로봉성。재궤조부하분별위37%、50%、75%、100%4충공황하,장복합공제결구여Smith 예측보상공제결구진행방진비교。결과표명,채용복합공제결구해결료모형삼수소범위시변문제,복합공제결구계약향응적공제효과명현우우Smith예측보상공제결구,제고료계통항지연성능。
Against such characteristics as pure time delay,time-varying and uncertainty of the controlled ob-j ect in main steam temperature control,a new control strategy based on anti-delay control structure was proposed,on the basis of error analysis.The inexact model based close-loop output and the actual close-loop output were weighted as a new structure's impulse.The new structure and the Smith predictor were com-bined to form a composite structure.The robust performance of the composite structure was analyzed.In addition,control effect of the composite control structure and the Smith predictive compensate control structure was compared.The results show that,the composite control structure solved the problem of time-varying within a small range,and its control effect to step response was obviously superior to that of the Smith predictive compensate control structure,which improved the anti-delay performance of the system.