- 标题
- 摘要
- 关键词
- 实验方案
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Enhanced Active Power balancing capability of Grid connected Solar PV fed Cascaded H-bridge Converter
摘要： Cascaded H-bridge converter is a promising solution for next generation large scale PV system having both active and reactive power exchange capacity. However, one challenge with this converter is unbalanced power generation among the clusters or cells due to variation in radiation level, temperature, dusting on PV cells etc. In order to inject balanced power to the grid, in this paper, a controlled exchange of reactive power is proposed so that the converter can work with unbalanced power generation within the clusters. Magnitude of reactive power exchange is derived and necessary conditions discussed. Additionally, the magnitude of zero voltage is derived taking into account both active and reactive power exchange with the grid. By exchanging reactive power, the converter can also be used during low voltage ride through (LVRT) condition. This paper introduces a novel representation of unbalanced power generation using barycentric coordinate system which helps to identify regions in the power plane which require the exchange of reactive power. The proposed method is verified through computer simulation and in a laboratory prototype.
关键词： Maximum Power point tracking (MPPT),Active power,Zero sequence voltage,Reactive power,Solar Photovoltaic,Cascaded H-bridge multilevel converter(CHB)
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE Industry Applications Society Annual Meeting (IAS) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Industry Applications Society Annual Meeting (IAS) - Performance Based Design of IMD for Single Stage PV Fed Water Pumping
摘要： This paper presents an improved designed induction motor, used for photovoltaic (PV) array fed water pumping system. The overall system is designed without a mechanical sensor to reduce both cost and complexity with simultaneous assurance of optimum power utilization of a PV array. The proposed system consists of an induction motor operated water pump, controlled by field-oriented control (FOC) with artificial neural network (ANN) current control technique. The MPPT (Maximum Power Point Tracking) as well as DC link voltage, is regulated by three-phase voltage source inverter (VSI). The estimation of motor speed eliminates the use of mechanical sensor and makes the system cheaper and robust. A new robust speed adaptive algorithm is presented, which is less dependent on parameters. A detailed study of various factors affecting the efficiency of the motor, is given to improve the behavior of the induction motor drive (IMD) for water pumping. The designed motor is tested on the developed prototype in the laboratory and its suitability is judged through various results under steady state and dynamic conditions of insolation variations.
关键词： Field-Oriented Control (FOC),Speed Adaptation,Finite Element Method,ANN Based Current Control,IMD (Induction Motor Drive),Water pump,PV Array,P&O Based MPPT Algorithm
更新于2025-09-23 15:23:52
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Implementation of Differential Power Processing to Optimize the Solar Power Generation
摘要： The objective of this paper is to harvest the optimum power from solar panel using different MPPT techniques for low power application under non-uniform irradiance conditions. The overall power output of photovoltaic system is reduced due to partial shading. A new differential power converter along with INC control algorithm is introduced to reduce the partial shading effect and oscillations of output power.
关键词： Differential power processing,Maximum Power Point Tracking (MPPT) techniques,Photo-Voltaic (PV) array,Maximum Power Point (MPP),Partial Shading Condition (PSC)
更新于2025-09-23 15:22:29
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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 53rd International Universities Power Engineering Conference (UPEC) - Glasgow, United Kingdom (2018.9.4-2018.9.7)] 2018 53rd International Universities Power Engineering Conference (UPEC) - A PV interface system based on high-gain high-frequency link converter
摘要： this paper presents a PV interface system based on an isolated high-gain high-frequency dc/dc converter. The PV array is connected to a square pulse high-frequency H-bridge. The Pulse Width (PW) of the output square voltage from the H-bridge inverter is controlled to extract the maximum power from the PV array using any of the Maximum Power Point Tracking (MPPT) schemes. The output of the H-bridge inverter is connected to the primary winding of a multi-secondary high-frequency transformer where each secondary winding is connected to a bridge rectifier. The bridge rectifiers are connected in series to boost the output dc-link voltage which is interfaced with the grid using a Voltage Source Inverter (VSI). During normal operating conditions, the VSI is controlled to regulate the dc-link voltage to transfer the harvested maximum power from the PV array to the grid at unity power factor. Moreover, the paper presents a Low Voltage Ride Through (LVRT) controller to meet the grid-code requirements and simultaneously protecting the proposed interface system from overvoltage. Simulation results based on PSCAD/EMTDC software are provided to assess the proposed PV interface system during different modes of operations
关键词： PV interface system,High frequency link,MPPT,LVRT controller
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Industry Applications Society Annual Meeting (IAS) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Industry Applications Society Annual Meeting (IAS) - Modified SEPIC Converter Utilizing an Improved P&O Algorithm for Design of Low Cost and Efficient Solar Energized Water Pump
摘要： This paper proposes a reliable and an efficient PV (Photovoltaic) powered water pump using a modified SEPIC converter with high static gain. The modified SEPIC converter has low switch voltage stress with high efficiency. It provides almost twice the static gain as compared to conventional boost converter and provides relatively large area for execution of maximum power point tracking (MPPT) controller. The switched reluctance motor (SRM) drive speed is controlled by using pulse width modulation (PWM) of a mid-point converter using only one voltage sensor. It supports to reduce the size of DC link capacitor and provides soft starting to drive via regulating the DC bus voltage. The operation of modified SEPIC converter in continuous inductor current mode (CICM) minimizes the stress on its devices and improves its conversion performance. An improved P&O (Perturb and observe) MPPT technique is used in proposed system. This MPPT controller has an additional advantage of regulating the flow rate of water pumping by adjusting the duty cycle of proposed DC-to-DC converter. The design procedure of system is described and a test bed is developed to verify its aptness under changing climate situations.
关键词： MPPT,Solar power generation,PWM switching,Modified SEPIC converter,SRM drive
更新于2025-09-23 15:22:29
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Integration of Solar PV with Low-Voltage Weak Grid System: using Maximize-M Kalman Filter and Self-tuned P&O Algorithm
摘要： This paper introduces a novel 'self-tuned perturb and observe (P&O)' (SPO) algorithm for quick maximum power point tracking (MPPT) and a novel maximize-M Kalman filter (MMKF) based control technique for optimal operation of 'grid-integrated solar PV system, where linear/nonlinear loads are attached at PCC (Point of Common Coupling)'. Proposed SPO is the improved form of perturb and observe (P&O) algorithm, where inherent problems of traditional P&O like steady-state oscillation, slow dynamic responses and fixed step size issues, are successfully mitigated. Therefore, SPO tracks maximum power peak (MPP) very rapidly and it very accurately extracts maximum power from the PV array. The extracted power is used to meet the active power requirement of loads, and after meeting the load demand, the excess power is supplied to the grid. During power feeding, the power quality and power management are maintained by the MMKF based control technique. In control strategy, the MMKF is used for fundamental harmonic component extraction from the grid voltage and load current, even when the grid voltage is characterized by adverse situations, like sag, swell, harmonic distortion, DC offset etc. Here, the SPO MPPT algorithm and MMKF based control techniques, are tested on a developed prototype. The efficient and reliable performances of SPO MPPT algorithm and MMKF based control algorithm, in dynamic as well as in steady-state condition, are demonstrated under insolation variation conditions, nonlinear loading, as well as in different grid disturbances such as over-voltage, under-voltage, phase imbalance, harmonics distortion in the grid voltage etc.
关键词： MPPT,Solar PV,MMKF,Power quality,Nonlinear Load,SPO
更新于2025-09-23 15:22:29
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018-ECCE Asia) - Niigata (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - A DPWM based Control Strategy to Integrate Photovoltaic System and Battery Storage using Grid Connected Three-level T-Type Inverter
摘要： In this paper, integration of photovoltaic (PV) system and battery storage is considered using Three-level T-Type inverter. To attain the highest efficiency, PV panels are considered to follow MPPT algorithm while batteries are operated based on their state of charge (SOC) condition. To provide distortion-free output current, it is essential considering unbalanced condition produced due to inconsistency of MPPT and SOC. Moreover, proper tradeoff between inverter and grid is realized so that inverter is automatically adapted with demand-power of grid. All the targets are carried out by proper control of Discontinuous PWM. The proposed method is evaluated by simulation study.
关键词： DPWM,Battery-SOC,MPPT algorithm,Grid connected three-level T-type inverter
更新于2025-09-23 15:22:29
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An H5 Transformerless Inverter for Grid Connected PV Systems with Improved Utilization Factor and a Simple Maximum Power Point Algorithm
摘要： Due to their small size, minimum cost, and great efficiency, photovoltaic (PV) grid-connected transformerless inverters have been developed and become famous around the world in distributed PV generators systems. One of the most efficient topologies of the transformerless inverter family is H5 topology. This inverter extracts a discontinuous current from the PV panel, which conflicts with the operation at maximum power point tracking (MPPT) conditions while the utilization factor of the PV degrades. This paper proposes improved H5 topology featuring a boost converter inserted in the middle between the PV panels and the H5 inverter. The design of the boost converter is planned to operate at continuous conduction mode to guarantee MPPT conditions of the PV. A new and simple off line MPPT algorithm is introduced and performance factors like efficiency and utilization factors of the proposed and convention H5 topology are compared. The simulation results indicate that the proposed system provides a preferable utilization factor and a simpler MPPT algorithm.
关键词： boost converter,PV panel,utilization factor,H5 inverter,utility grid,MPPT
更新于2025-09-23 15:22:29
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[IEEE 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Coimbatore, India (2018.3.1-2018.3.3)] 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT) - Development of Learning Automaton based Maximum Power Point Tracking Algorithm for Solar PV System
摘要： The main objective of this paper is to introduce the concept of Learning Automata (LA) algorithm and its adaptability for the development of Maximum Power Point Tracking (MPPT) controller for solar PV system. MPPT algorithm using LA is proposed and the development of LA as MPPT is explained in detail. The proposed MPPT receives the temperature and irradiation as input and the MPPT output is the duty cycle. The LA MPPT is initially trained for various ranges of temperature and irradiation levels in offline. The trained controller is implemented online and tested for various conditions through simulation using MALTAB. The performance proposed LA MPPT is analyzed by comparing the results with P&O MPPT.
关键词： Pursuit Algorithm,Maximum Power Point Tracking,Photovoltaic,MATLAB,Learning Automata,P&O MPPT
更新于2025-09-23 15:22:29