- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Novel High Gain, High Efficiency DC–DC Converter Suitable for Solar PV Module Integration With Three-Phase Grid Tied Inverters
摘要： This paper proposes a novel configuration for high gain, high efficiency dc–dc converter comprising a single switch, two intermediate capacitors, and a coupled inductor for low voltage solar PV module fed applications. The high voltage gain is achieved by charging the intermediate capacitors through the coupled inductor in parallel and discharging in series. In a two winding coupled inductor, considered in the presented work, maximum two intermediate capacitors can be integrated with the secondary winding. A passive lossless clamped circuit is also provided in the converter, which recovers the leakage energy to improve the efficiency and alleviate large voltage spike. The structure of the circuit is such that the power device voltage stress is reduced thereby increasing the efficiency. The maximum power point tracking at various irradiation levels is implemented in the proposed converter. Laboratory prototype of a 300-W system with 30–45-V input and 700-V output was built to validate the theoretical claims. All the detailed analysis, simulation, and experimental waveforms are presented. A maximum converter efficiency of around 95% is achieved.
关键词： maximum power point tracking (MPPT),switched capacitor,solar PV,coupled inductor,dc micro-grid,step-up,high efficiency,3-φ inverter,low voltage,high gain,dc–dc converters
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Common Mode Noise Analysis for a High Step-Up Converter with GaN Devices
摘要： High Step-up converters have numerous applications in renewable energy systems and electric automotive industry. To improve the power density, an interleaved high step-up boost converter with coupled inductor was proposed. However, for practical applications is compulsory that this topology must comply with the CISPR standards. Therefore, to identify the noise sources in the analyzed converter, an equivalent noise modelling is conducted. These models revealed the dependency of inductor windings on different noise sources. For experimental analysis of the conducted emissions of this topology, GaN FETs based prototype is designed. Several tests were carried out to find the effect of various factors on noise emission. As results of tests, 1) Increasing the switching frequency generates increase in the noise spikes 2) Noise emissions from the converter do depend on its mode of operation 3) High peaks of noise are generated at low frequency range by reducing the voltage transition time across the switch.
关键词： Coupled-Inductor,High Step-Up,GaN FETs,CM Noise,DC-DC Converter,EMI Noise
更新于2025-09-23 15:22:29
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[IEEE 2019 IEEE 5th International Conference for Convergence in Technology (I2CT) - Bombay, India (2019.3.29-2019.3.31)] 2019 IEEE 5th International Conference for Convergence in Technology (I2CT) - Soft-Switching High Step-Up Active Clamp Coupled Inductor-Based Converter for Grid-Tied Solar Photovoltaic Applications
摘要： The Renewable energy source like solar Photovoltaic is desired to be worked at low voltages. For grid-tied applications, it requires high voltage conversion which results in a reduced efficiency. In this work, zero-voltage switching (ZVS) based dc-dc converter with high step-up active clamped coupled inductor is presented for grid-tied solar photovoltaic applications. For achieving high conversion ratio switched capacitor cell is inserted to coupled inductor secondary winding. With this combination, the difficulties of leakage inductance are overcome. The active clamp circuit is incorporated to overwhelm the voltage spikes across the switches and also to implement the ZVS operation for switching devices. Simulation results for the proposed dc-dc converter are presented with the theoretical analysis.
关键词： coupled inductor,soft-switching,switched capacitor cell,Active clamp
更新于2025-09-23 15:21:01
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Novel Three-Port Bidirectional DC/DC Converter with Three-Winding Coupled Inductor for Photovoltaic System
摘要： This study proposes a novel three-port bidirectional converter with a three-winding coupled inductor and applies it to a photovoltaic (PV) system to step up the PV system output to a dc bus or dc load while charging the battery. When the PV output is insufficient, battery voltage is stepped up to the dc bus voltage, and when the dc bus has excess energy, it is stepped down to charge the battery. Thus, a three-port bidirectional high step-up/step-down converter is achieved. A three-winding common core coupled inductor is designed and implemented in the converter, and a full-wave doubler circuit is used on the high-voltage side to achieve a high step-up effect. Power switches and diodes in the circuit are shared to achieve bidirectional operation. The output capacitors recover secondary-side leakage inductance energy in the step-up mode, and the third winding can be used to recover primary-side leakage inductance energy to reduce the voltage spike on switching in order to improve the converter’s conversion efficiency. A 500-W three-port bidirectional converter is implemented to verify the feasibility and practicability of the proposed topology. According to the measurement results, the highest efficiency of the PV step-up mode is 95.3%, the highest efficiency of the battery step-up mode is 94.1%, and the highest efficiency of the step-down mode is 94.8%.
关键词： three-winding coupled inductor,three-port bidirectional converter
更新于2025-09-23 15:19:57
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Switched Capacitor-Coupled Inductor DCa??DC Converter for Grid-Connected PV System using LFCSO-Based Adaptive Neuro-Fuzzy Inference System
摘要： In this paper, the Levy °ight-based chicken swarm optimization (LFCSO) is proposed to follow the highest power of grid-joined photovoltaic (PV) framework. To analyze the grid-associated PV framework, the characteristics of current, power, voltage, and irradiance are determined. Because of the low yield voltage of the source PV, a big advance up converter with big productivity is required when the source PV is associated with the matrix power. A tale great advance up converter dependent on the exchanged capacitor and inductor is illustrated in this paper. The LFCSO algorithm with the adaptive neuro-fuzzy inference system is used to generate the control pulses of the transformer-coupled inductor DC–DC converter-less switched capacitor. While using the switched capacitor-coupled inductor, the voltage addition is expanded in the DC–DC converter and the power of PV is maximized. Here, the normal CSO algorithm is updated with the help of Levy °ight functions to generate optimal results. To get the accurate optimal results, the output of the proposed LFCSO algorithm is given as the input of the ANFIS technique. After that, the optimal results are generated and they provide the pulses for the system. The working guideline is analyzed and the voltage addition is derived with the utilization of the proposed technique. From that point forward, it predicts the exact maximum power of the converter according to its inputs. Under the variety of solar irradiance and partial shading conditions (PSCs), the PV system is tested and its characteristics are analyzed in di?erent time instants. The proposed LFCSO with ANFIS method is actualized in Simulink/MATLABstage, and the tracking executing is examined with a traditional method such as genetic algorithm (GA), perturb and observe (P&O) technique–neuro-fuzzy controller (NFC) and fuzzy logic controller (FLC) technique.
关键词： irradiance,Levy °ight-based chicken swarm optimization algorithm,partial shading conditions,transformer-less switched capacitor-coupled inductor DC–DC converter voltage,current,power,grid-connected PV,GA-NFC and FLC methods
更新于2025-09-23 15:19:57
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[IEEE 2019 3rd International Conference on Computing Methodologies and Communication (ICCMC) - Erode, India (2019.3.27-2019.3.29)] 2019 3rd International Conference on Computing Methodologies and Communication (ICCMC) - The application of DC borewell with High Step-Up DC-DC Converter By Using Photovoltaic System
摘要： In this paper, the application of DC borewell with high step-up DC-DC converter used to produce high voltage gain along with coupled inductor and switched capacitor technique. This topology consist of switched voltage multiplier capacitor and coupled inductor. The switched capacitor get charged in switch off period by using energy accumulated in coupled inductor which increase the losses are voltage gain. Therefore, the conduction minimized with the RDS low resistance and main power switch circuit. The simulation model of “The application of DC borewell with high Step-up DC-DC Converter is based on switched Using Photovoltaic System” capacitor and coupled inductor techniques. MATLAB software is used to give input of 17v from the PV panel and expectedly got output voltage of load 500 v and power of 200W. Finally, checked its working with basic circuit of 20v I/P and 530V O/P.
关键词： coupled inductor,photovoltaic system,switched capacitor,DC borewell motor,converter
更新于2025-09-16 10:30:52
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[IEEE 2019 International Seminar on Intelligent Technology and Its Applications (ISITIA) - Surabaya, Indonesia (2019.8.28-2019.8.29)] 2019 International Seminar on Intelligent Technology and Its Applications (ISITIA) - Application of High Gain Zeta Converter For Photovoltaic System
摘要： Photovoltaics are generally used to convert solar energy into electrical energy. If the number of photovoltaic module are limited, then the output voltage will be small. In order to connect the inverter to the grid directly without any transformer devices, it requires extra high gain boost converter. In practice, conventional boost converter only able to increase the input voltage about 4 times. Therefore, this research will implement and analyze the performances of integrated quadratic-boost-zeta high gain DC-DC converter for photovoltaic application. The advantage of this converter is having a high ratio voltage conversion with a small duty cycle and requires few components. From the experiment, this converter can convert input voltage from 18 V to 330 V on duty cycle of 65,92%.
关键词： photovoltaic,quadratic boost zeta converter,coupled inductor,high gain
更新于2025-09-16 10:30:52
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Coupled-Inductor-Based Differential Boost Inverter with Wide Input Voltage Range for Photovoltaic Generation Applications
摘要： The differential boost inverter has been widely used as a microinverter for the renewable distributed generations as it achieves an ac voltage with amplitude larger than the dc input. However, the unlimited voltage gain of the boost inverter is practically unachievable due to the existence of the parasitic resistance of the input inductor, which narrows the input voltage range and distorts the output voltage waveform as the turn-on duty ratio of the power switches approaches unity. To solve this problem, a novel coupled-inductor-based differential boost inverter is proposed, which uses a two-winding or three-winding coupled inductor to enhanced voltage gain. As a result, the input voltage range of the proposed inverter is significantly widened, facilitating grid-connected applications with a very low dc input voltage, compatible to the outputs of most PV panels. Moreover, the leakage inductance energy of the coupled inductor is recycled with voltages across the power switches clamped to the dc link capacitor by using a lossless diode. A prototype with 30 V dc input, 155 V ac output, nominal power 200 W, was built, which achieves a high voltage-boost, while keeping relatively low voltages stresses on the semiconductor devices.
关键词： coupled-inductor boost inverter,PV generation application,leakage inductance effect,high voltage gain
更新于2025-09-16 10:30:52
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Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems
摘要： This paper presents a single-stage solar photovoltaic (SPV) fed light-emitting diode (LED) street lighting system (LED-SLS) using a novel soft-switched buck-boost bidirectional DC-DC converter (BDC). A coupled inductor (CI) based auxiliary circuit is used in the proposed BDC to achieve soft switching, which leads to improved efficiency with reduced ripple. As SPV power is available during day time alone, a battery storage system (BSS) is used. The BSS is charged from SPV during day time through the proposed CI-BDC. The BSS powers the LED-SLS during night time through the same CI-BDC. The proposed CI-BDC provides various advantages like buck/boost operation in either direction of power flow, zero voltage switching (ZVS) soft-switching, use of single magnetic core, high efficiency, reduced ripple in output current, and simple control. Also, it provides an illumination control of the LED-SLS using pulse-width modulation (PWM) dimming. To maintain high efficiency even at light loads, the proposed CI-BDC works as conventional BDC by turning OFF the auxiliary circuit. Thus, avoiding the high conduction losses in it at light loads. The detailed working principle and design analysis are presented along with simulation results. A prototype of 40 W LED lighting system has been developed, and experimental validation is presented.
关键词： buck-boost,bidirectional,soft switching,coupled inductor,LED driver
更新于2025-09-12 10:27:22