1. Input‐parallel–output‐series control strategy for three‐level medium‐voltage DC grid‐type converter
- Author
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Faisal Mehmood Shah, Wenqiang Xie, Wen Li Yan, Rui Li, Han Minxiao, and Girmaw Teshager Bitew
- Subjects
constant magnitude ,Computer science ,grid-connected converter ,feedback ,02 engineering and technology ,Sliding mode control ,0202 electrical engineering, electronic engineering, information engineering ,DC voltages ,MATLAB ,050107 human factors ,computer.programming_language ,constant output voltages ,control topology input-parallel–output-series converter system ,05 social sciences ,General Engineering ,DC-DC power convertors ,sliding mode control ,variable structure systems ,Grid ,Power (physics) ,PI control ,power convertors ,comprehensive control feedback system ,control system synthesis ,three-level neutral-point-clamped converter ,proportional–integral control method ,input-parallel–output-series control strategy ,Energy Engineering and Power Technology ,Topology (electrical circuits) ,constant frequency ,input current sharing ,Control theory ,output current sharing ,0501 psychology and cognitive sciences ,outer voltage loop control ,closed-loop control topology ,three-level medium-voltage DC grid-type converter ,Series (mathematics) ,voltage control ,variable voltage ,020208 electrical & electronic engineering ,high-output power applications ,power grids ,inner current loop control ,ICS ,lcsh:TA1-2040 ,lcsh:Engineering (General). Civil engineering (General) ,Constant (mathematics) ,computer ,electric current control ,Software ,closed loop systems ,Voltage - Abstract
A control topology input-parallel–output-series converter system is investigated, which is suitable for high-voltage and high-output power applications. In this control method input current sharing (ICS) and output current sharing (OVS) taken into account. As observed, ICS is automatically attained as OVS sharing is controlled. In this design, two modules are connected in series, Module 1 provided variable voltage but in Module 2 by using three-level neutral-point-clamped converter and designing a comprehensive control feedback system, which regulates the DC voltages at the constant magnitude and constant frequency, helps to provide constant output voltages in the event of uncertain disturbance and load variation, A feedback double closed-loop control topology (inner current loop control and outer voltage loop control) with the combination of sliding mode control and a proportional–integral control method. A simulation model is built, by using MATLAB/Simulink, and the simulation results show excellent performance and feasibility of this system. This will be beneficial for research and improvement for the grid-connected converter.
- Published
- 2018
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