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논문 기본 정보

자료유형
학술대회자료
저자정보
Aisha Qamar (National University of Sciences and Technology Islamabad) Asad Ullah Awan (National University of Sciences and Technology Islamabad) Kunwar Fraz Ahmed Khan (National University of Sciences and Technology Islamabad) Muwahida Liaquat (National University of Sciences and Technology Islamabad)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2015
발행연도
2015.10
수록면
1,024 - 1,029 (6page)

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The paper presents the designing of a robust control scheme for uninterruptible power supplies (UPS) by implementing scenario based approach which is a probabilistic solution framework to synthesize and analyze the problems that can be expressed in the form of minimization of a linear objective subject to convex constraints parameterized by uncertainty terms. The scenario based problem being a standard convex optimization problem possesses the solution which is approximately feasible for the infinite set of constraints and is obtained by appropriate sampling of uncertain constraints. The load variation of UPS affects the output voltage and hence is considered as a linear uncertain parameter with a known range in the dynamic model of UPS. An LPV H-infinity optimization problem is formulated in the presence of load variations maintaining the output voltage to the desired value. To design the control problem guaranteeing an a-priori particular probabilistic robustness we use the scenario based approach by randomly selecting the finite number of uncertain scenarios for the load variations instead of using conventional ploytopic approach which covers and comments on the entire uncertainty set for UPS and the solution of scenario problem is computed efficiently by solving the optimization problem using linear matrix inequalities (LMIs).
Numerical simulations and comparisons with LPV H-infinity and with linear PID control design shows the proposed scheme makes the system more robust towards uncertainties as well as exogenous disturbances to make it stable and improving its THD and transient performance.

목차

Abstract
1. INTRODUCTION
2. POLYTOPIC MODELING OF UNINTERRUPTIBLE POWER SUPPLIES WITH UNCERTAINITIES
3. METHODOLOGY ADOPTED
4. CONTROLLER DESIGN
5. DESIGN EXAMPLE
6. GRAPHICAL AND TABULAR RESULTS
7. CONCLUSION
8. REFERENCES

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UCI(KEPA) : I410-ECN-0101-2016-569-001918344