Variable structure and time-varying parameter control for hydroelectric generating unit

Luqing, Ye; Shouping, Wei; Xu, Haibo; Malik, O.P.; Hope, G.S.

doi:10.1109/60.43227

Cited by 23 publications

(3 citation statements)

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“…Consequently, an optimal gain scheduled PID controller was proposed by Orelind et al (1989) and Luqing et al (1989) studied the use of variable structure and parameter varying controllers. The most common controller type used in hydro turbine plants is the classical three-term PID controller, which is designed based on linear control theory for one particular operating load condition.…”

Section: Introductionmentioning

confidence: 99%

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers

2013

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Hydro turbines have complex non-linear dynamics, especially in the presence of large or abrupt load disturbances. In this work, the implementation of a weighted multiple model adaptive control (WMMAC) scheme on a hydro turbine plant was studied. To ensure stability, the system was designed in accordance with the virtual equivalence system and adaptive mixing control criteria. Four candidate linear estimator models were chosen representing 25%, 50%, 75% and 100% load conditions. For each candidate estimator model, a compensator was designed to meet performance requirements under the corresponding candidate load conditions. The performance of three different control structures; the H ∞ , LQG/LTR and PI controllers, used in the WMMAC scheme, were simulated under abruptly changing and smoothly varying load conditions. To account for the transients before reaching synchronous speed, in the first 50 seconds, a no-load compensator was used. From the results, the PI controller produced the best performance.

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Section: Introductionmentioning

confidence: 99%

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers

2013

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“…The gate movement way of the former type is advantageous to accelerate start-up process. (2) In the traditional open-loop start-up process, we made the unit fkequency reach to the rated one by controlling the gate movement. Owing to the reasons mentioned above, it is hard to fix the best start-up opening, which leads to two unfavorable cases: @ To prolong adjusting time (the value of Y,, is too small, shown in Figure 7);@To be adjusted excessively (the value of Y , is too large, shown in Figure 11).…”

Section: Analysis Of Simulation Resultsmentioning

confidence: 99%

“…regulating parameters can easily be revised [2]. In the process of start-up, it can realize closed-loop start-up with an expected start-up speed behavior as set point in software to expedite start-up process.…”

Section: I1 Closed-loop Start-up Control Strategymentioning

confidence: 99%

A closed-loop start-up control strategy and its simulation studies for hydroelectric generating units

Ling

Luqing

Tie-bing

2001 International Conferences on Info-Tech and Info-Net. Proceedings (Cat. No.01EX479)

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A new control strategy, called closed-loop start-up, has been proposed in this paper. With an expected frequency preset value behavior, the unit frequency always tracks it in the closed-loop start-up, so that it can expedite start-up process. This strategy is realized by software so that it adapts to variable parameters for different units. In this paper using the visualization methods have done many start-up simulation studies. The simulation results show that the proposed control strategy is satisfactory.

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Overview of Hydropower Control Systems

Muñóz-Hernández

Mansoor

Jones

2012

Advances in Industrial Control

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Variable structure and time-varying parameter control for hydroelectric generating unit

Cited by 23 publications

References 1 publication

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers

A closed-loop start-up control strategy and its simulation studies for hydroelectric generating units

Overview of Hydropower Control Systems

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Variable structure and time-varying parameter control for hydroelectric generating unit

Cited by 23 publications

References 1 publication

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">&infin;, LQG and PI controllers

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">&infin;, LQG and PI controllers

A closed-loop start-up control strategy and its simulation studies for hydroelectric generating units

Overview of Hydropower Control Systems

Contact Info

Product

Resources

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Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers

Multiple model adaptive control of a hydro turbine plant - performance of H<SUB align="right">∞, LQG and PI controllers