Analysis and Solution of Voltage Overvoltage Problem in Grid Connection of Distributed Photovoltaic System

2018 ◽  
Author(s):  
Liu Chao ◽  
Chen Yongting ◽  
Zhu Xunjun
Keyword(s):  
Photovoltaic System ◽  
Grid Connection

Grid-Connected Photovoltaic System Based on QZSI

2013 ◽  
Vol 722 ◽  
pp. 166-170
Author(s):  
Jie Liu ◽  
Fei Wu
Keyword(s):  
Coordinate System ◽  
Energy Conversion ◽  
Network Structure ◽  
Control Strategy ◽  
Decoupling Control ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Matlab Simulink ◽  
Grid Connection ◽  
Reactive Current

Quasi-Z-source inverter (QZSI) is a new topology, which has been proposed to be simple and realize the single stage energy conversion in recent years. Due to the unique impedance network structure, it has the characteristic of shoot-through. In this paper the voltage-source QZSI is applied to grid-connected photovoltaic system. Firstly the operating principle of QZSI is deep analyzed, and then a grid-connected photovoltaic system using a QZSI is proposed. In order to conform to the requirement of grid-connection, the decoupling control thought of active current and reactive current by d-q rotating coordinate system and the modified PWM strategy of this system are studied. The rationality and feasibility of the proposed control strategy is verified through MATLAB/Simulink.

Quintessential strategy to operate photovoltaic system coupled with dual battery storage and grid connection

2021 ◽  
Author(s):  
Jamshaid Mannan ◽  
Muhammad Ahmad Kamran ◽  
Muhammad Umair Ali ◽  
Malik Muhammad Naeem Mannan
Keyword(s):  
Photovoltaic System ◽  
Battery Storage ◽  
Grid Connection

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.

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 Low Power Passive Photovoltaic System Development to Assist Inconvenient Grid Connection Locations

2013 ◽  
Vol 05 (06) ◽  
pp. 411-415 ◽  
Author(s):  
Ranjit Singh Sarban Singh ◽  
Siva Kumar Subramaniam ◽  
Siti Aisyah Anas ◽  
Tan Chee Fai
Keyword(s):  
Low Power ◽  
System Development ◽  
Photovoltaic System ◽  
Grid Connection

A Novel Neuro-Fuzzy Controller for Multilevel Renewable Energy System

2015 ◽  
Vol 4 (1) ◽  
pp. 20
Author(s):  
T PAVAN KUMAR ◽  
B N KARTHEEK
Keyword(s):  
Power Electronics ◽  
Fuzzy Controller ◽  
Energy System ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Output Terminal ◽  
Switching Losses ◽  
Grid Connection ◽  
Neuro Fuzzy ◽  
The Cost

<p>Recently, Development and the utilization of single phase based multilevel inverters has been increased. This paper proposes concept based new topology based seven level inverter with less number of power electronics switches with utility grid connection. This proposed multilevel inverter operates with only eight power electronics switches at their fundamental frequency. This inverter produces seven level output from the input here we considered as a photovoltaic system. The cost, complexity, switching losses are small due to because of usage of less number of switches. The DC/DC converter receives input from which the three positive output voltages are generated and the multilevel inverter performs as a polarity reversal that provides both the positive and negative cycle output. For further enhancement in the output waveform, the filter circuit can be integrated in the output terminal of the multilevel inverter. This paper also proposed a concept of a neuro-fuzzy controller for controlling the seven level inverter. The simulation results are observed by means of MATLAB simulink toolbox.</p>

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