Voltage Mode Control Method Research Articles

태양광 발전을 이용한 LED-배터리 시스템을 위한 Flyback DC/DC 컨버터 모델링 및 제어기 설계

This paper considers the Flyback DC/DC converter modeling and controller design for the LED-battery system using PV(Photovoltaic) energy. Recently, they have many concerns about battery charger and DC distribution system for green energy. This paper discusses the modeling of the Flyback DC/DC converter for LED lighting and battery charger with small-signal modeling. Also, the voltage mode control method and the current mode control method are compared for the Flyback DC/DC converter. Frequency-responses predicted by the small-signal modeling is verified by MATLAB simulation. The feature and design considerations are illustrated and verified through the experiment with a 40㎑ MOSFET based experimental circuit.

A grid-tied flyback-based PV inverter with BCM variable frequency voltage mode control

The modularized microinverter, which can feed small power to the grid directly, has the merit of increasing the conversion efficiency and installed flexibility of the renewable power generation system. This paper proposes a control method for a microinverter derived from the conventional AC-DC boundary conduction mode (BCM) PFC converter. The variable frequency peak current mode control method and the variable frequency voltage mode control method are proposed for the control of a flyback-based inverter. Modeling of the inverter and quantitative controller design of the variable frequency voltage mode control method is presented. A 120 W experimental system with PV module for generating power is built. The effectiveness of the proposed method is confirmed via simulations and measured results.

Hybrid photovoltaic generation system with novel islanding detection method

This paper proposes an islanding detection method for a hybrid photovoltaic generation system (HPGS). This HPGS is controlled using an improved voltage-mode control method in both the grid-connected and the stand-alone conditions to unify and simplify the control circuit. The inverter of this HPGS is multi-functional, so it can perform the functions of active power filter, charging/discharging a battery set, uninterruptible power supply, and injecting power into the grid of distribution power system. The proposed islanding detection method is incorporated into the controller of the inverter. The advantage of islanding detection method is the time required to add a disturbance for detecting the islanding operation is very short. A prototype is developed and tested to verify the performance of the proposed HPGS. The experimental results verify that the proposed islanding detection method can effectively detect the islanding operation, so this HPGS achieves the expected performance.

Aneurisma valvular aórtico perforado secundario a endocarditis infecciosa

This paper proposes an islanding detection method for a hybrid photovoltaic generation system (HPGS). This HPGS is controlled using an improved voltage-mode control method in both the grid-connected and the stand-alone conditions to unify and simplify the control circuit. The inverter of this HPGS is multi-functional, so it can perform the functions of active power filter, charging/discharging a battery set, uninterruptible power supply, and injecting power into the grid of distribution power system. The proposed islanding detection method is incorporated into the controller of the inverter. The advantage of islanding detection method is the time required to add a disturbance for detecting the islanding operation is very short. A prototype is developed and tested to verify the performance of the proposed HPGS. The experimental results verify that the proposed islanding detection method can effectively detect the islanding operation, so this HPGS achieves the expected performance.