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Design and Comparison of an Adaptive and Robust Control Strategy to Improve the Boiler-Turbine unit Performance and Reduction of Make-Up Water
Ghabraei, Soheil | 2015
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 47632 (08)
- University: Sharif University of Technology
- Department: Mechanical Engineering
- Advisor(s): Moradi, Hamed; Vossoughi, Gholamreza
- Abstract:
- There is many sources of uncertainty in the power plants such as continuous changes of the ambient temperature and the climate condition. The controller of the boiler-turbine unite should be robust against uncertainties and overcome the changes in the operating condition. In this regard, a robust adaptive variable structure control scheme (RAVCS) is proposed to control a nonlinear multi-input multi-output (MIMO) model of industrial boiler-turbine unite, in the presence of unknown parameters and bounded uncertainties as well as external disturbances. Moreover, a robust controller based on and in the presence of rational deviation in parameters, is designed. To investigate the zero dynamics and control ability via the nonlinear techniques, input-output linearization is performed. Appropriate adaption laws are introduced to tackle the parameter uncertainty and modeling the imprecisions as well as external disturbances. Appropriate control laws are introduced to guarantee the convergence to the sliding surface. Then, the robustness and stability of the proposed RAVCS is proved via Lyapunov stability theory. To investigate the performance of proposed control schemes, simulation studies are carried out on a realistic nonlinear model in the presence of mentioned uncertainties. Comparison between results reveals the satisfactory performance of the both proposed controllers even against the large uncertainties. However, the overall performance of the was better the in comparison with RAVCScontroller
- Keywords:
- Multivariable Control ; Robust-Adaptive Schemes ; Boiler-Turbine Unit ; Parameters Uncertainty ; Robust Performance
- محتواي کتاب
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- پایانامه _نهایی_شکلها editoral_el
- تقدیم
- سپاسگذاری
- چکیده
- فهرست جدولها
- فهرست شکلها
- 1 فصل اول : مقدمه
- 2 فصل دوم: مفاهیم پایه
- 2-1 مقدمه
- 2-2 اجزاء و فرایندهای نیروگاه حرارتی
- 2-3 معادلات حاکم بر دینامیک بویلرـ توربین
- 2-3-1 بررسی تأثیر ورودیها بر متغییرهای حالت دینامیک واحد بویلرـ توربین
- 3 فصل سوم: مرور بر ادبیات موضوعی
- 4 فصل چهارم : مطالعه دینامیک غیرخطی واحد بویلرـ توربین با استفاده از روشهای طراحی کنترلر خطی
- 5 فصل پنجم : طراحی کنترلر مقاوم به روشهای مدلغزشی برمبنای قوانین تطبیق و تکنیک ,-∞.
- 6 فصل ششم : شبیهسازی و تحلیل نتایج
- 7 فصل هفتم : نتیجهگیری
- مراجع
- پیوست
- ISA Transactions Volume issue 2015 [doi 10.1016_j.isatra.2015.04.010] Ghabraei, Soheil; Moradi, Hamed; Vossoughi, Gholamreza -- Multivariable robust adaptive sliding mode control of an industrial bo
- Abstract
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