Optimization of Photovoltaic Grid-Connected Inverter System

2013 ◽  
Vol 722 ◽  
pp. 161-165
Author(s):  
Xing Quan Wu ◽  
Qiu Peng Li ◽  
Yan Li
Keyword(s):  
Reactive Power ◽  
Photovoltaic System ◽  
Space Vector ◽  
Current Harmonics ◽  
Grid Connection ◽  
Distributed Parameters ◽  
Grid Connected Inverter ◽  
The Stability ◽  
Photovoltaic Plant ◽  
Rotating Coordinates

In order to increase the stability of grid connection of photovoltaic plant, effort has been made to study the grid connection principle of photovoltaic plant, mathematical model of grid-connected photovoltaic inverter and power grid distributed parameters, and improve traditional space vector control theory to keep d axis of d-q rotating coordinates consistent with the rotating space vector of network voltage and realize decoupling control over active power and reactive power of grid-connected photovoltaic system, through real-time detection of fluctuations in grid-connected current and network voltage, get voltage current dual-loop to place feedback control, which effectively compensates the modulating signal of inverter, reduces photovoltaic grid-connected output voltage and current harmonics so that the system has better robustness, and improves the reliability of grid connection.

scholarly journals RESEARCH AND DESIGN OF GRID-CONNECTED INVERTER IN PHOTOVOLTAIC SYSTEM WITH SVPWM TECHNIQUE

2020 ◽  
Vol 6 (11) ◽  
pp. 18-31
Author(s):  
Nguyen Duc Minh ◽  
Bui Van Huy ◽  
Ngo Thi Quan ◽  
Nguyen Quang Ninh ◽  
Trinh Trong Chuong
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Experimental Results ◽  
Photovoltaic System ◽  
Photovoltaic Systems ◽  
Space Vector ◽  
Electrical Grid ◽  
Three Phase ◽  
Grid Connected Inverter ◽  
Research And Design

This paper presents the design and simulation of three phase grid-connected inverter for photovoltaic systems with power ratings up to 5 kW. In this research, the application of Space Vector Pulse Width Modulation (SVPWM) technique for inverter is explored. With the use of SVPWM inverter, synchronization between the inverter and electrical grid follows the Phaselocked Loop (PLL) algorithm. The proposed design is simulated and validated by experimental results.

Grid-Connected Inverter with Harmonic Compensation for Distributed Power System

2013 ◽  
Vol 313-314 ◽  
pp. 804-808
Author(s):  
Li Wang ◽  
Wen Xin Huang ◽  
Fei Fei Bu ◽  
Ying Hu
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Reactive Power ◽  
Utilization Efficiency ◽  
Harmonic Compensation ◽  
Distributed Power ◽  
Grid Connection ◽  
Harmonic Pollution ◽  
Distributed Power System ◽  
Grid Connected Inverter

To solve the problem of harmonic pollution in distributed power system, a new type of grid-connected inverter with harmonic compensation is studied in this paper. This system adopts a unified control strategy with decoupled active and reactive power based on grid voltage orientation. Both the grid connection and harmonic compensation are realized together in one inverter, which improves the inverter’s utilization efficiency and protects the power grid from harmonic pollution. The simulation and experimental results are shown to prove the correctness of the control strategy.

Control Method of Inverter for Large-Scale Grid-Connected Photovoltaic Generation System

2013 ◽  
Vol 448-453 ◽  
pp. 2507-2510
Author(s):  
Zhuo Zhang ◽  
Hong Wei Li
Keyword(s):  
Power Factor ◽  
Feedback Linearization ◽  
Large Scale ◽  
Reactive Power ◽  
Control Method ◽  
Solar Irradiation ◽  
Dynamic Feedback ◽  
Photovoltaic Array ◽  
Grid Connected Inverter ◽  
Photovoltaic Plant

A grid-connected inverter control method to analyze dynamic process of large-scale and grid-connected photovoltaic (PV) power station is proposed. The reference values of control variables are composed of maximum power output of the photovoltaic array in the photovoltaic power plant and power factor specified by dispatching. Control strategy of dynamic feedback linearization is adopted. Nonlinear decoupling controller is designed for realizing decoupling control of real-and reactive-power. The cascade PI regulation is proposed to avoid inaccurate parameter estimation which generates the system static error. Simulation is carried out based on the simplified power system with large-scale photovoltaic plant model, the power factor, and solar irradiation, and bus fault are considered for the further research. Its demonstrated that the parameter adjustment of PI controller is simple and convenient, dynamic response of system is transient, and the stability of the inverter control is verified.

Strategy for Grid-Connection Control of Photovoltaic System

2014 ◽  
Vol 1070-1072 ◽  
pp. 35-38
Author(s):  
Ju Bo Wang ◽  
Xiu Yang ◽  
Wei Bao ◽  
Wen Li Xu
Keyword(s):  
Reactive Power ◽  
Decoupling Control ◽  
Photovoltaic System ◽  
Photovoltaic Systems ◽  
Pv Inverter ◽  
Grid Connection ◽  
Active And Reactive Power ◽  
Power Decoupling ◽  
Simulation And Experiment

With more and more photovoltaic systems connected to the grid, a strategy for grid-connection control is proposed. The topology of PV inverter and photovoltaic inverter and the active and reactive power decoupling control of photovoltaic system are analyzed. The feasibility and effectiveness of the strategy for grid-connection control is verified by simulation and experiment by the case on the RTDS.

A Method of Harmonic Current Suppression in Photovoltaic Grid-Connected Systems

2013 ◽  
Vol 303-306 ◽  
pp. 1145-1148
Author(s):  
Jia Guo ◽  
Zhi Gang Li ◽  
Ya Ping Cheng ◽  
Kai Huang ◽  
Chun Yan Cui
Keyword(s):  
Control Strategy ◽  
Current Waveform ◽  
Output Current ◽  
Harmonic Current ◽  
Current Harmonics ◽  
Waveform Control ◽  
Photovoltaic Power ◽  
Grid Connected Inverter ◽  
The Stability ◽  
Power Generation Systems

The grid-connected inverter plays an important role in the photovoltaic power generation systems, the output of the grid current harmonics affect the stability of the grid. The reason of grid inverter output current distortion, a detailed analysis of current waveform control strategy and its effectiveness of the grid-connected inverter harmonic current suppression is introduced based on the d-q coordinates in this paper.

scholarly journals MATHEMATICAL MODELLING AND SIMULATION OF GRID CONNECTED SOLAR PHOTOVOLTAIC SYSTEM

2014 ◽  
pp. 195-199
Author(s):  
K. N. DINESH BABU ◽  
R. RAMAPRABHA ◽  
V. RAJINI
Keyword(s):  
Reactive Power ◽  
Photovoltaic System ◽  
Modulation Index ◽  
Maximum Output ◽  
Solar Photovoltaic ◽  
Point Tracking ◽  
Three Phase ◽  
Grid Connected Inverter ◽  
Power Point ◽  
Solar Photovoltaic System

This paper presents the mathematical modeling of three-phase grid connected inverter fed by Solar Photovoltaic (SPV) system with Maximum Power Point Tracking (MPPT). Analysis has been carried out to choose the proper modulation index for maximum output for three-phase inverter. With this modulation index, the variation of the active and reactive power for different loads has been presented along with major parameters like Transfer ratio and Efficiency. Also the Real and Reactive power output of the SPV has been measured with various solar Radiation levels.

scholarly journals Grid-Connected Inverter for a PV-Powered Electric Vehicle Charging Station to Enhance the Stability of a Microgrid

2021 ◽  
Vol 13 (24) ◽  
pp. 14022
Author(s):  
Yohan Jang ◽  
Zhuoya Sun ◽  
Sanghyuk Ji ◽  
Chaeeun Lee ◽  
Daeung Jeong ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Reactive Power ◽  
Experimental Results ◽  
Grid Voltage ◽  
Charging Station ◽  
Electric Vehicle Charging ◽  
Grid Connected Inverter ◽  
The Stability ◽  
Continuous Power ◽  
Pv Generation

This study proposes a grid-connected inverter for photovoltaic (PV)-powered electric vehicle (EV) charging stations. The significant function of the proposed inverter is to enhance the stability of a microgrid. The proposed inverter can stabilize its grid voltage and frequency by supplying or absorbing active or reactive power to or from a microgrid using EVs and PV generation. Moreover, the proposed inverter can automatically detect an abnormal condition of the grid, such as a blackout, and operate in the islanding mode, which can provide continuous power to local loads using EV vehicle-to-grid service and PV generation. These inverter functions can satisfy the requirements of the grid codes, such as IEEE Standard 1547–2018 and UL 1741 SA. In addition, the proposed inverter can not only enhance the microgrid stability but also charge EVs in an appropriate mode according to the condition of the PV array and EVs. The proposed inverter was verified through experimental results with four scenarios in a lab-scale testbed. These four scenarios include grid normal conditions, grid voltage fluctuations, grid frequency fluctuations, and a power blackout. The experimental results demonstrated that the proposed inverter could enhance the microgrid stability against grid abnormal conditions, fluctuations of grid frequency and voltage, and charge EVs in an appropriate mode.

A Reference Compensation Current Control of Grid-Connected Inverter for Three-Phase Distributed Generators

2013 ◽  
Vol 433-435 ◽  
pp. 1183-1187 ◽  
Author(s):  
Shao Ru Zhang ◽  
Shao Yuan Li
Keyword(s):  
Control Strategy ◽  
Distribution Systems ◽  
Reactive Power ◽  
Neutral Current ◽  
Power Converter ◽  
Active Power ◽  
Current Control ◽  
Renewable Energy Resources ◽  
Current Harmonics ◽  
Grid Connected Inverter

Renewable energy resources (RES) are being increasingly connected in distribution systems by utilizing power electronic converters. However, the extensive use of power electronics has resulted in a rise in power quality (PQ) concerns faced by the utility. A novel control strategy implementing reference compensation current was proposed in this paper. So that these grid-connected inverters can achieve maximum benefits when they installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to transfer active power from RES to the grid, and 2) load reactive power demand support; 3) current harmonics compensation at PCC; and 4) current unbalance and neutral current compensation in case of 3-phase 4-wire system. Moreover, with adequate control of grid-interfacing inverter, all the four objectives can be accomplished either individually or simultaneously. Simulation results show the validity and capability of the novel proposed control strategy.

scholarly journals Bifurcations and Chaos in a Photovoltaic Plant

2019 ◽  
Vol 29 (08) ◽  
pp. 1950102 ◽  
Author(s):  
Mohamed Abdelmoula ◽  
Bruno Robert
Keyword(s):  
Stability Study ◽  
Buck Converter ◽  
Photovoltaic System ◽  
Photovoltaic Array ◽  
Modeling Process ◽  
Time Modeling ◽  
Numeric Simulation ◽  
The Stability ◽  
Photovoltaic Plant ◽  
Dynamic Investigation

This paper presents a comprehensive approach to analyze the dynamics of a photovoltaic system by using a discrete-time modeling approach. The proposed structure consists of a photovoltaic array, a two-cell DC–DC buck converter and a load connected in cascade through a DC bus. The research efforts focus on the modeling process and stability analysis, which leads to an implementation with a comprehensive description validated through simulation results. The research efforts focus on the numeric simulation improvements and dynamic investigation of the photovoltaic system under digital controls. The chaotic behaviors that appear in the photovoltaic plant are then studied. The aim of the last part is to detail the stability study using numerical simulation.

scholarly journals Design and Simulation Analysis of 12.4 kWp Grid Connected Photovoltaic system by using PVSYST Software

2020 ◽  
Vol 8 (5) ◽  
pp. 2859-2864
Keyword(s):  
Simulation Analysis ◽  
Photovoltaic System ◽  
Performance Ratio ◽  
Energy Output ◽  
Photovoltaic Module ◽  
Software Environment ◽  
Photovoltaic Array ◽  
Grid Connection ◽  
Solar Photovoltaic System ◽  
Photovoltaic Plant

The grid connected photovoltaic based systems are gaining popularity day by day, since it is considered to be as a reliable and eco friendly system. This paper mainly discusses about the design aspects of a grid connection based solar photovoltaic system. As a part of design, a 12.4kWp photovoltaic array nominal power generation at standard temperature conditions has been considered and simulated the same in PVSYST software environment. The paper throws light on various aspects like developing sankey diagram of the power output losses, examining the performance ratio and its energy output of photovoltaic plant which is to be installed, investigating the performance of a selected photovoltaic module, fixing of tilt angle, plotting of power and temperature distribution related curves through software simulation. This paper also shows the recommendations pertaining to connection of modules in a string mode and shown the power sizing curve of inverter output.

Sign in / Sign up

Export Citation Format

Share Document