Modelling and control of dual input boost converter with voltage multiplier cell. Issue 8 (13th November 2019)

• Record Type: Journal Article
• Authors: Appikonda, Mohan; Kaliaperumal, Dhanalakshmi
• Is Part Of: IET circuits, devices & systems. Volume 13:Issue 8(2019)
• Page Start: 1267
• Page End: 1276
• Publication Date: 2019-11-13
• Subjects: field programmable gate arrays -- transfer functions -- DC-DC power convertors -- voltage control -- voltage regulators -- voltage multipliers -- dynamic response -- renewable energy sources -- linearisation techniques; load changes -- input disturbances -- energy system -- dynamic model -- higher order converter -- overlapping switching signals -- small-signal transfer function model -- state-space averaging -- small-signal linearisation -- duty cycle transfer functions -- converter dynamics -- nonminimum phase system -- dual loop control strategy -- uncompensated systems -- fractional controller -- dynamic response -- dual input boost converter -- dual input DC–DC converter -- dual boost -- integrated voltage multiplier cell -- duty cycles -- voltage gain -- independent renewable energy resources -- output voltage regulation -- integer-order converter model -- field-programmable gate array -- power 200.0 W; Electronic circuits -- Periodicals; Electronic systems -- Periodicals; 621.381505
• DOI: 10.1049/iet-cds.2019.0123
• Languages: English
• ISSNs: 1751-858X

Abstract

Abstract : A dual input DC–DC converter with dual boost and integrated voltage multiplier cell operating at duty cycles larger than 0.5 is a necessity to achieve a high voltage gain for energy systems possessing two independent renewable energy resources. Output voltage regulation during load changes and input disturbances is the requisite of an energy system, which is achieved by the implementation of a suitable control action, which further requires the dynamic model of the converter. The modelling of this higher order converter with overlapping switching signals is complicated. The small‐signal transfer function model based on state‐space averaging followed by small‐signal linearisation is verified using MATLAB and powersim (PSIM). The output voltage to duty cycle transfer functions significantly contributes to representing the converter dynamics from which its right‐half s ‐plane zero is analysed. Since it is a non‐minimum phase system, a dual loop control strategy is adopted. Voltage regulation and active current sharing are ensured from the simulation and experimental responses of the uncompensated and compensated systems. Further, from the derived integer‐order converter model a fractional controller is designed and its dynamic response is compared with the traditional controller. A 200 W prototype of the converter is developed, and the control is implemented using field‐programmable gate array.