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According to the dynamic characteristics and static relationship of boiler steam temperature controlled object, to establish the model of boiler steam temperature, it can be described by block diagrams or state space, which has the full scope non-linear and time-varying characteristics. The section transfer functions can be converted into variable state space applied Jordan blocks and algebraic transformation...
The contradiction of speediness and stability is a difficult problem in face of control theory study and control system design at all times. The paper takes time-variable and great-inertia controlled object and its algebra equivalence system as example open out and explain inherence relation produced by character of time-variable to control index. The sufficiency condition of robust Luenberger function...
Complex controlled object request its control system has more and more functions. Every control theory has its strong points and shortage. The paper demonstrates inherence relation of fuzzy control and state feedback control. And balance compatibility and similarities and difference of the two control method at certain conditions. The connotation of generalized intelligent control is take opening...
For overall interests of the entire power system stability, generator units should have faster and more flexible load response characteristics. Due to complexity of dynamic characteristics of controlled object in thermal control field and new problems are caused by large-capacity power generation equipments updated, many difficulties brings out for control system's design and application. According...
The boiler thermal control system is well known with the characteristic of slow time-varying, large lag and large inertia. Adopting generalized Jordan block and algebra equivalence transform method, all of the transfer functions at different load points is transformed to state-space description with time variable. According to engineering practice of control strategy based on incremental function...
Dynamic characteristic of supercritical unit is complex. Its control technology is an important research task. This paper presents a mathematical model of coordinated control system controlled objects. For control characteristic of supercritical unit, design a generalized intelligent coordinated control system which made up of classical control, modern control, intelligence control and special measure...
This paper presents a control system design scheme which combined the State Feedback based on the Increment Function Observer with PID, this design scheme has been successfully applied to a 600 MW boiler super-heater steam temperature control system. The control system could be in automation mode continually while the unit quickly changed its load up to 375 MW in succession, and it was taking an excellent...
The proof of stability for an observer is very important for it can be used in engineering application. Adopting state-space method to describe the synthetic coordinated control system that is combined with state feedback based on incremental function observer (IFO-KDeltax) merging PID controller and plus intelligent control, the sufficient condition of control system stabilization is given by mathematical...
Boiler super-heater steam temperature control object is generally with characteristic of parameters slow time variable, big inertia and larger time lag. Using the IFO-KDeltax and PI state observer for reference, the concept of "Incremental PI Function Observer in Broad Sense" (IFO-PI/BS) is presented. Theorem on stable conditions of control system based on the IFO-PI/BS is proved by mathematical...
Even if the transfer function G(s) of a control system is given, but the practical observer should be designed according to G1(s) that is a equivalent form of the G(s) because of some uncertain reason. Based on the algebra equivalent concept of linear system theory, the mathematical definitions of three types of algebra observer are presented, those are named as full dimension algebra equivalent state...
Based on the compare of two steam feed-water systems of unit 1 and unit 2 in YaoMeng Power Plant, two different Benson once-through boiler feed-water control schemes are designed in this paper, and the state feedback control based on the incremental mode state observer is adopted in both feed-water control schemes. Engineering practice shows that adopting the control scheme of unit 1 and the second...
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