Evolutionary Design Automation of High Efficiency Series Resonant Converter for Photovoltaic Systems

Mohammed, Mohammed Sami; Vural, Revna Acar

doi:10.1109/tpel.2020.2987086

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…In this method, by defining a cost function, it generates populations for variables using mutation, crossover, and other methods and compares the cost function values for any individuals and selects the best. [34][35][36] In this study, GA method is used for solving the optimization problem. The best and mean fitness function values for described cost function (Equation (42) vice generation number have depicted in Figure 7.…”

Section: Solving the Optimization Problem And Resultsmentioning

confidence: 99%

“…Genetic algorithm is a popular optimization method. In this method, by defining a cost function, it generates populations for variables using mutation, crossover, and other methods and compares the cost function values for any individuals and selects the best 34–36 . In this study, GA method is used for solving the optimization problem.…”

Section: Design and Optimization Methodology And Resultsmentioning

confidence: 99%

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A new detailed loss model and design approach for LLC resonant converter with phase shift control to overall optimization of converter loss at whole battery charging process

Saadati

Ghayebloo

2022

Circuit Theory & Apps

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This paper proposes a new loss modeling and design method for phase shift controlled resonant LLC converter with optimization applied to minimize the overall loss during the whole battery charging process. In this work, the loss model has been formulated more accurately for phase shift controlled LLC converter. One of the contributions in accurate loss modeling is all switching modes of power switches have been investigated in detail in the aspect of zero voltage switching (ZVS) and ZCS occurrence and their related dynamic loss are updated in loss calculation during the whole charging process. In addition, to optimize the copper and core losses of high‐frequency transformer and resonant inductor, a design trend is included in optimization process to calculate the best physical dimensions and winding parameters of magnetic components. A genetic algorithm has been employed for the optimization during the charging process. In this work, the first harmonic approximation (FHA) model was developed and solved by nonlinear Newton–Raphson method in any operating point along one complete charging process. The target of optimization was designing a wall mounted type level 2 battery charger (7.4 kw/32A) for charging a battery pack with specs according to the Nissan Leaf 2011 electric vehicle. For verification of the proposed method, simulation results are provided and also experimental results for a low‐scale prototype are proposed. In this study, the average efficiency along the overall charging process obtained up to 95% in simulation and 84% in experiments.

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Section: Solving the Optimization Problem And Resultsmentioning

confidence: 99%

Section: Design and Optimization Methodology And Resultsmentioning

confidence: 99%

A new detailed loss model and design approach for LLC resonant converter with phase shift control to overall optimization of converter loss at whole battery charging process

Saadati

Ghayebloo

2022

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…The important links and output characteristics are described in detail. Mohammed and Vural (2020) use the finite element method to subdivide the high-frequency transformer into finite parts, calculates the magnetic flux density value according to the optimized design parameters, and then uses genetic algorithm, differential evolution algorithm and nondominant sorting genetic algorithm to develop an automatic solution framework for SRC converter resonant element parameters, which can achieve ZVS in different states. Yang et al (2022) proposed an integrated winding structure with negligible external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Research and optimization design of two-stage isolated inverter power supply based on series quasi-resonance

Wang

Song

et al. 2023

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Purpose This paper aims to solve the problems of large hard switching loss and unclear resonant parameter design in the existing inverter power supply topology. Design/methodology/approach This paper proposes a simple and reliable two-stage isolated inverter composed of series quasi-resonant push-pull and external freewheeling diode full-bridge inverter. The power supply topology is analyzed, the topology mode is analyzed, the mathematical model of the converter is established and the DC gain of the converter is deduced. The relationship between the load and the output gain of the resonant tank is presented, a new resonant parameter design method is proposed, and the parameter design of the resonant element of the converter is clarified. Findings The resonant components of the converter are designed according to the proposed resonant parameter design method, and the correctness of the method is verified by simulation and the development and testing of a 500 W experimental prototype. After experimental tests, the peak efficiency of the experimental prototype can reach 94%. Because the experimental prototype achieves soft switching, the heat generation of the switch is greatly reduced, so the heavy heat sink is removed, and the volume is reduced by about 30% compared with the traditional power supply, and the total harmonic distortion of the output voltage is about 2%. Originality/value The feasibility of the scheme is verified by experiments, which is of great significance for improving the efficiency of the inverter power supply and parameter optimization.

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“…Solar energy is one of the fastest growing renewable energy driven by the strong demand for renewable energy, reduction in cost of photovoltaic (PV) modules, and the development of the PV technologies [1], [2]. Recently, medium-voltage DC (MVDC) structure is considered a promising solution for large-scale PV plants to increase the power capacity and improve the performances with higher efficiency and flexibility, and lower control complexity [3].…”

Section: Introductionmentioning

confidence: 99%

Open-Circuit Fault Analysis and Fault-Tolerant Control for 2/3-Level DAB Converters

Song

Yang

Sangwongwanich

et al. 2021

2021 IEEE 12th Energy Conversion Congress &Amp; Exposition - Asia (ECCE-Asia)

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Open-circuit faults (OCFs) on power switches are crucial issues for the two-three (2/3)-level dual-active-bridge (DAB) DC-DC converters, resulting in various performance degradation such as DC bias, overcurrent and capacitor voltage imbalance. There are two necessary steps for overcoming these problems, i.e., fault diagnosis and fault-tolerant control. In order to identify the faulty switch, the characteristics of the transient waveforms when the OCF occurs on each switch are analyzed in this paper. Based on the analysis, the midpoint voltage of each bridge arm is employed as the diagnosis signals.According to the mean values and duty cycles of the midpoint voltages, the faulty switch can be located accurately. Subsequently, a fault-tolerant control method called "complementary-switch-blocking" (CSB) is proposed through modulation reconfiguration. In the proposed CSB method, when one switch breaks down, the gate-driving signal of its complementary switch is blocked and the OCF effects can be offset. Finally, simulation results demonstrate that the OCF effects can be reduced significantly with the proposed faulttolerant method, and the power transmission capacity can be improved compared with the traditional fault-tolerant method.

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Evolutionary Design Automation of High Efficiency Series Resonant Converter for Photovoltaic Systems

Cited by 7 publications

References 28 publications

A new detailed loss model and design approach for LLC resonant converter with phase shift control to overall optimization of converter loss at whole battery charging process

A new detailed loss model and design approach for LLC resonant converter with phase shift control to overall optimization of converter loss at whole battery charging process

Research and optimization design of two-stage isolated inverter power supply based on series quasi-resonance

Open-Circuit Fault Analysis and Fault-Tolerant Control for 2/3-Level DAB Converters

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