Power Quality Analysis of a Grid-connected Solar/Wind/Hydrogen Energy Hybrid Generation System

2018 ◽  
Vol 9 (1) ◽  
pp. 377
Author(s):  
Sujit Kumar Bhuyan ◽  
Prakash Kumar Hota ◽  
Bhagabat Panda
Keyword(s):  
Power Quality ◽  
Power Transmission ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Quality Analysis ◽  
Hydrogen Energy ◽  
Generation System ◽  
Hybrid Generation ◽  
Pv System ◽  
Wind Energy Conversion

A grid connected hybrid generation system (HGS) consisting of wind energy conversion System (WECS)/Photo voltaic (PV) System/solid oxide fuel cell (SOFC) is designed and simulated by using Matlab/Simulink. SOFC is the replacement of battery, attached to produce the clean energy when these renewable energy sources are unable to produce required amount of electric power. A controller is used to regulate the flow of H<sub>2 </sub>through the valveto the SOFC and the rest amount of H<sub>2 </sub>is stored in storage tank. Also, an operational control strategy (OCS) is developed to utilize maximum amount of power of PV to the required load and rest amount of power is coming from wind to fulfill the load demand. Hence, the electrolyzer is supplied by the wind power to convert the water in to H<sub>2</sub> and oxygen. Also the power quality factor (PQF) analysis is exercised to measure the quality of power transmission.

scholarly journals Forecasting and Modelling the Uncertainty of Low Voltage Network Demand and the Effect of Renewable Energy Sources

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2151
Author(s):  
Feras Alasali ◽  
Husam Foudeh ◽  
Esraa Mousa Ali ◽  
Khaled Nusair ◽  
William Holderbaum
Keyword(s):  
Renewable Energy ◽  
Low Voltage ◽  
Renewable Energy Sources ◽  
Golden Ratio ◽  
Clean Energy ◽  
Energy Sources ◽  
Percentage Error ◽  
Ann Model ◽  
Demand Forecast ◽  
Pv System

More and more households are using renewable energy sources, and this will continue as the world moves towards a clean energy future and new patterns in demands for electricity. This creates significant novel challenges for Distribution Network Operators (DNOs) such as volatile net demand behavior and predicting Low Voltage (LV) demand. There is a lack of understanding of modern LV networks’ demand and renewable energy sources behavior. This article starts with an investigation into the unique characteristics of householder demand behavior in Jordan, connected to Photovoltaics (PV) systems. Previous studies have focused mostly on forecasting LV level demand without considering renewable energy sources, disaggregation demand and the weather conditions at the LV level. In this study, we provide detailed LV demand analysis and a variety of forecasting methods in terms of a probabilistic, new optimization learning algorithm called the Golden Ratio Optimization Method (GROM) for an Artificial Neural Network (ANN) model for rolling and point forecasting. Short-term forecasting models have been designed and developed to generate future scenarios for different disaggregation demand levels from households, small cities, net demands and PV system output. The results show that the volatile behavior of LV networks connected to the PV system creates substantial forecasting challenges. The mean absolute percentage error (MAPE) for the ANN-GROM model improved by 41.2% for household demand forecast compared to the traditional ANN model.

Wind, Photovoltaic anD Mini-Hydro Hybrid Generation in Bolivia: A Case Study at a Mountainous Village

2005 ◽  
Vol 29 (3) ◽  
pp. 271-286 ◽  
Author(s):  
Tsutomu Dei ◽  
Kiyoshi Hirata ◽  
Izumi Ushiyama
Keyword(s):  
Renewable Energy ◽  
Energy Balance ◽  
Power Output ◽  
Renewable Energy Sources ◽  
Solar Irradiation ◽  
Energy Sources ◽  
Generation System ◽  
Hybrid Generation ◽  
Site Monitoring

This paper investigates the most feasible configuration for hybrid generation by indigenous renewable energy sources in Chachacomani village at 4,220 meters elevation in Bolivia. Site monitoring of wind, solar irradiation and the water level of the Jarma River was conducted for a year. The data enabled potential power output from Wind, PV and Micro Hydro generation system to be estimated. Energy balance calculations for different configuration of hybrid generation system were made. The results show that the three energy supplies would be complementary for integrated power.

scholarly journals Power Quality Enhancement in Grid Connected PV Systems using High Step Up DC-DC Converter

2017 ◽  
Vol 7 (2) ◽  
pp. 720
Author(s):  
V S Prasadarao K ◽  
K V Krishna Rao ◽  
P Bala Koteswara Rao ◽  
T. Abishai
Keyword(s):  
Power Quality ◽  
Fossil Fuels ◽  
Reactive Power ◽  
Neutral Current ◽  
Renewable Energy Sources ◽  
Current Control ◽  
Control Technique ◽  
Pv System ◽  
Hysteresis Current Control ◽  
Switching Losses

Renewable energy sources (RES) are gaining more importance in the present scenario due to the depletion of fossil fuels and increasing power demand. Solar energy is the one of the most promising as it is clean and easily available source. The voltage obtained from the PV system is low. This voltage is increased by high step up dc-dc converter which uses only one switch leads to low switching losses and hence the efficiency of this converter is high. To get the good response this converter is operated in closed loop manner. Integration of PV system with existing grid has so many issues like distorted voltage, current and reactive power control etc. This paper presents a four leg inverter which works on hysteresis current control technique to address the power quality issues like reactive power compensation, balanced load currents and compensation of neutral current. The switching to the inverter is designed in such a way that it supplies the extra current to stabilise the current of the grid that is being supplied to the loads. Finally, the proposed technique is validated by using mat lab/Simulink software and corresponding results are presented in this paper.

The Influence of Wind–Solar Hybrid Generation System on Transmission Service Rate

2014 ◽  
Vol 1070-1072 ◽  
pp. 1472-1476
Author(s):  
Hong Jun Kan ◽  
Lun Nong Tan
Keyword(s):  
Solar Energy ◽  
Power Transmission ◽  
Effective Means ◽  
Service Rate ◽  
Power Network ◽  
Generation System ◽  
Hybrid Generation ◽  
System A ◽  
Before And After ◽  
Network Transmission

Wind power and solar energy have been developed rapidly during recent years. However, costs of power transmission services have been rising due to their respective instability of working, which has become a barrier restricting their developments. Wind and Solar Hybrid Generation System, a result of the combination of wind and solar energy, which is a good match in terms of resources, is an effective means to improve the reliability of power generation. In this paper, the topic of influences on price of power network transmission service caused by the combination of wind and solar energy has been discussed. Based on power changes caused by the combination of wind and solar energy, comparing different prices of power transmission service before and after this combination, pointing out that it is more economical when the wind and solar energy are combined, which has been verified through the 5 nodes system.

scholarly journals Power quality analysis of the grid-connected PV system using microinverter

2020 ◽  
Vol 1 ◽  
pp. 1-6
Author(s):  
Ngo Xuan Cuong ◽  
Do Nhu Y
Keyword(s):  
Power Quality ◽  
Research Method ◽  
Quality Analysis ◽  
Small Scale ◽  
Laboratory Measurements ◽  
Electrical System ◽  
Pv System ◽  
Power Quality Analysis ◽  
Scale Grid

At present, small-scale grid-connected PV system is increasingly developed and used in many households. These small-scale PV system are often connected to grid using microinverter, because its advantages are low maintenance investment costs, ease of installation and operation and do not cause environmental pollution. The content of the article focuses on power quality analysis of the non-stored grid-connected PV system using microinverter. The research method in the paper is based on experiments on models and laboratory measurements. The analytical results will assess the power quality of grid-connected PV system using microinverter, thereby managers and operators to take measures to improve the power quality of the electrical system with grid-connected PV system.

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