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[IEEE 2019 Innovations in Power and Advanced Computing Technologies (i-PACT) - Vellore, India (2019.3.22-2019.3.23)] 2019 Innovations in Power and Advanced Computing Technologies (i-PACT) - A Novel Switched Capacitor based High Gain Boost Converter with efficient MPPT controller for LED Lighting Applications
摘要： The paper proposed a novel switched capacitor based high gain quadratic DC-DC boost converter with Perturb & Observe MPPT (Maximum Power Point Tracking) controller. The converter configuration is appropriate to be employed in fuel cell and solar photovoltaic systems. The presented converter topology is designed with solar powered switched capacitor based voltage lift technique to provide high voltage conversion ratio. Due to variable atmospheric conditions it’s very difficult to provide constant output to the LED (Light Emitting Diode) load. Even small change in the characteristics of LED that will effect to damage the load. Hence P&O (Perturb & Observe) MPPT controller is applying for the designed converter configuration in order to produce stable output with high gain under variable weather conditions. Due to high step up gain and symmetrical configuration of the circuit topology, the stress voltage across the power semiconductor devices is low. Hence, the metal oxide semiconductor field-effect transistor gives high performance with low ON state resistance. The design cost of the circuit is reduces because of using low voltage rating diodes. Also reverse recovery and conduction losses are low which improves the power conversion and efficiency of the converter. The principle of operation and steady state analysis of the circuit topology are conferred in detail. Finally a simulation experiment of proposed converter with 120Watts of LED load is simulated and verified with theoretical analysis.
关键词： High voltage conversion ratio,Switched Capacitor,LED (Light Emitting Diode),PWM (Pulse Width Modulation) control,MPPT(Maximum Power Point Tracking),SMPS (Switched Mode Power Supplies),P&O (Perturb &Observe)
更新于2025-09-19 17:13:59
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[IEEE 2018 2nd International Conference On Electrical Engineering (EECON) - Colombo, Sri Lanka (2018.9.28-2018.9.28)] 2018 2nd International Conference On Electrical Engineering (EECon) - Simulation Performance of Grid Connected Z-Source Solar Inverter with Incremental Conductance MPPT
摘要： Z source inverters (ZSI) can perform single stage, buck-boost conversion and have shown to offer slightly higher efficiency over traditional inverters. However, ZSI controller unit becomes more complex when achieving all objectives of Grid connected solar inverter applications where Maximum Power Point Tracking (MPPT), grid synchronization and harmonic reduction from output voltage and current are simultaneously implemented. The control concept used to achieve above objectives is that varying shoot through duty of ZSI while keeping peak DC link voltage at a constant value. Control structure is designed in synchronous reference frame with two cascaded loops as outer voltage control loop and inner current control loop to maintain power balance of ZSI which results constant peak DC voltage. Besides that, incremental conductance algorithm sets shoot through duty of ZSI to extract maximum power from solar panel at a given irradiance and temperature level. In this paper we present a simulation study of a grid connected ZSI along with Incremental Conductance MPPT method. The details of theory, operation, design and simulation results are included in the paper.
关键词： MPPT,grid connected,modulation control,Z-source inverter (ZSI),incremental conductance,simple boost
更新于2025-09-09 09:28:46