scholarly journals Power Quality Assessment of Grid-Connected PV System in Compliance with the Recent Integration Requirements

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 366 ◽  
Author(s):  
Ali Q. Al-Shetwi ◽  
M A Hannan ◽  
Ker Pin Jern ◽  
Ammar A. Alkahtani ◽  
A. E. PG Abas
Keyword(s):  
Power Quality ◽  
Power Plants ◽  
Large Scale ◽  
Low Voltage ◽  
Control Strategies ◽  
Frequency Variation ◽  
Pv System ◽  
Current Harmonics ◽  
Dynamic Voltage ◽  
Voltage Flicker

The generation and integration of photovoltaic power plants (PVPPs) into the utility grid have increased dramatically over the past two decades. In this sense, and to ensure a high quality of the PVPPs generated power as well as a contribution on the power system security and stability, some of the new power quality requirements imposed by different grid codes and standards in order to regulate the installation of PVPPs and ensure the grid stability. This study aims to investigate the recent integration requirements including voltage sag, voltage flicker, harmonics, voltage unbalance, and frequency variation. Additionally, compliance controls and methods to fulfill these requirements are developed. In line with this, a large-scale three-phase grid-connected PVPP is designed. A modified inverter controller without the use of any extra device is designed to mitigate the sage incidence and achieve the low-voltage ride-through requirement. It can efficiently operate at normal conditions and once sag or faults are detected, it can change the mode of operation and inject a reactive current based on the sag depth. A dynamic voltage regulator and its controller are also designed to control the voltage flicker, fluctuation, and unbalance at the point of common coupling between the PVPP and the grid. The voltage and current harmonics are reduced below the specified limits using proper design and a RLC filter. The obtained results show that the proposed controller fulfilled the recent standard requirements in mitigating power quality (PQ) events. Thus, this study can increase the effort towards the development of smooth PVPP integration by optimizing the design, operation and control strategies towards high PQ and green electricity.

scholarly journals Review on Power Quality Enhancement and its effects on Micro Grid

IJOSTHE ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 5
Author(s):  
Ankeeta . ◽  
Vasant Acharya
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Power Plants ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Electrical Power ◽  
Small Scale ◽  
Quality Enhancement ◽  
Reliability Of Operation ◽  
Unbalanced Loads

Power generation through the renewable energy sources has become more viable and economical than the fossil fuel based power plants. By integrating small scale distributed energy resources, microgrids are being introduced as an alternative approach in generating electrical power at distribution voltage level. The power electronic interface provides the necessary flexibility, security and reliability of operation between micro-sources and the distribution system. The presence of non-linear and the unbalanced loads in the distribution system causes power quality issues in the Microgrid system. This paper explores and reviews different control strategies developed in the literature for the power quality enhancement in microgrids.

scholarly journals Large Photovoltaic Power Plants Integration: A Review of Challenges and Solutions

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3798 ◽  
Author(s):  
Mansouri ◽  
Lashab ◽  
Sera ◽  
Guerrero ◽  
Cherif
Keyword(s):  
System Integration ◽  
Power Plants ◽  
Large Scale ◽  
System Stability ◽  
Pv System ◽  
Pv Systems ◽  
Large Scale Integration ◽  
Voltage Limit ◽  
The Stability ◽  
Scale Integration

Renewable energy systems (RESs), such as photovoltaic (PV) systems, are providing increasingly larger shares of power generation. PV systems are the fastest growing generation technology today with almost ~30% increase since 2015 reaching 509.3 GWp worldwide capacity by the end of 2018 and predicted to reach 1000 GWp by 2022. Due to the fluctuating and intermittent nature of PV systems, their large-scale integration into the grid poses momentous challenges. This paper provides a review of the technical challenges, such as frequency disturbances and voltage limit violation, related to the stability issues due to the large-scale and intensive PV system penetration into the power network. Possible solutions that mitigate the effect of large-scale PV system integration on the grid are also reviewed. Finally, power system stability when faults occur are outlined as well as their respective achievable solutions.

scholarly journals Harmonic Distortion Prediction Model of a Grid-Tie Photovoltaic Inverter Using an Artificial Neural Network

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 790 ◽  
Author(s):  
Matej Žnidarec ◽  
Zvonimir Klaić ◽  
Damir Šljivac ◽  
Boris Dumnić
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Power Quality ◽  
Prediction Models ◽  
Harmonic Distortion ◽  
Pv System ◽  
Current Harmonics ◽  
Pv Systems ◽  
Input Parameters ◽  
Artificial Neural

Expanding the number of photovoltaic (PV) systems integrated into a grid raises many concerns regarding protection, system safety, and power quality. In order to monitor the effects of the current harmonics generated by PV systems, this paper presents long-term current harmonic distortion prediction models. The proposed models use a multilayer perceptron neural network, a type of artificial neural network (ANN), with input parameters that are easy to measure in order to predict current harmonics. The models were trained with one-year worth of measurements of power quality at the point of common coupling of the PV system with the distribution network and the meteorological parameters measured at the test site. A total of six different models were developed, tested, and validated regarding a number of hidden layers and input parameters. The results show that the model with three input parameters and two hidden layers generates the best prediction performance.

Study on Project of Photovoltaic Power Plant Connecting to the Grid

2013 ◽  
Vol 380-384 ◽  
pp. 3111-3114
Author(s):  
Yi Shi Shu ◽  
Li Li Ma ◽  
Chao Peng
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Large Scale ◽  
Pv System ◽  
Photovoltaic Generation ◽  
Large Capacity ◽  
Photovoltaic Power

Large scale photovoltaic generation is another way to generate electricity.When a large capacity PV system connected to the grid,much impact could be brought to the grid due to its uncertainty. In this paper, there are research and analysis about the technology and characteristics of the photovoltaic power plants connected to the grid, make a strong practical impacts.

Application of Dynamic Voltage Restorer for Power Quality Improvement in Low Voltage Electrical Power Distribution Network: An Overview

2017 ◽  
Vol 28 ◽  
pp. 142-156 ◽  
Author(s):  
Patrick Taiwo Ogunboyo ◽  
Remy Tiako ◽  
Innocent E. Davidson
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Low Voltage ◽  
Electrical Power ◽  
Distribution Network ◽  
Power Distribution Network ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Power Quality Improvement ◽  
Dynamic Voltage

Dynamic Voltage Restorer (DVR) is a series connected power electronics based custom power device that is used to improve voltage disturbances in low voltage electrical power distribution network. Power quality requirement is one of the most important concerns for power system. The parts of the DVR is made up of voltage source inverter, injection/booster transformer, a harmonic filter, an energy storage device and a bypass switch. The DVR is used to inject three phase voltage in series and in synchronism with the network voltages in order to compensate voltage disturbances with a benefit of active /reactive power control. This paper presents a review of the researches on the dynamic voltage restorer application for power quality improvement in low voltage electrical power distribution networks. It describes power quality issues, principle of operation of DVR, basic components of DVR, DVRs control topologies in distribution network, DVR control strategies and compensation techniques.

scholarly journals Design and Fabrication of an Automatic Trash Remover for Open Channel Waterway for Micro Hydropower Plant Application

2019 ◽  
Vol 2 (2) ◽  
pp. 145-148
Author(s):  
A. M. Shiddiq Yunus ◽  
Musrady Mulyadi ◽  
Apollo Apollo
Keyword(s):  
Renewable Energy ◽  
Power Plants ◽  
Large Scale ◽  
Open Channel ◽  
Control Mechanism ◽  
Low Voltage ◽  
Hydropower Plant ◽  
Maintenance Cost ◽  
Small Communities ◽  
Hydropower Plants

Mitigation of catastrophic impacts of exhausted pollutants from conventional based power plants could be done by extensively used of renewable energy-based power plants. One of the promising renewable-based power plants that already have technology maturity is hydropower. However, large scale hydropower is based on an appropriate site and not economically effective for isolated and remote small communities. As anticipation, to fulfill the power requirements of these communities, micro-hydropower plants (MHPPs) are applied due to its inexpensive capital and low maintenance cost. Normally, MHPPs projects are finalized from civil construction to powerhouse. A simple trash filter is usually located before the intake of the penstock. This simple trash filter usually causes a problem related to trash collection that blocks the water debit into the penstock intake. The low debit, might cause the turbine's rotation will be reduced which in turn downgrade the voltage and frequency. Low voltage and frequency might harm consumers. In this paper, a new control mechanism based on Arduino Mega of automatic trash removed is introduced.

scholarly journals A Unique Control Strategy and Power Management in Wind/Solar Renewable Energy Power System to Improve the Power Quality of Grid System

2021 ◽  
pp. 52-60
Author(s):  
Khashiya Parveen ◽  
Prof. Shravan Vishwakarma
Keyword(s):  
Wind Turbine ◽  
Power Quality ◽  
Power Plants ◽  
Large Scale ◽  
Reactive Power ◽  
Hybrid Energy ◽  
Enhancement Method ◽  
Photo Voltaic ◽  
Compensation Device ◽  
Harmonic Components

Hybrid energy generation which includes both wind and solar energy has grown exponentially in latest years, and this will continue. Power quality problems such as voltage-swells, voltage-sags, harmonic components, power factor, and inadequate voltage control are caused by intermittent various exposures and the incorporation of wind-turbine and Photo-voltaic power generating systems with the grid. A Static Compensator (STATCOM) is employed to enhance power-quality. The power quality enhancement method for grid-connected wind-turbine and photo voltaic power plants employing STATCOM is introduced in this paper.  The framework of the proposed methodology describes in order to improve the transient voltage stability of the large-scale wind / solar hybrid system, the STATCOM reactive power compensation device is connected to the grid.   The compensator is offered to further improve output parameters such as voltage THD, current THD and active power.

scholarly journals A Composite Control Method for Power Quality Enhancement: PI Controller with Neural Network

2021 ◽  
Vol 9 (VI) ◽  
pp. 673-680
Author(s):  
Pratibha Tiwari
Keyword(s):  
Neural Network ◽  
Power Quality ◽  
Large Scale ◽  
Control Method ◽  
Control Strategies ◽  
Research Work ◽  
Distribution Networks ◽  
Pi Controller ◽  
Quality Enhancement ◽  
Micro Grid

The number of installations of Micro-Grid will increase to quadruple by 2020. The purpose is to improve the power quality while reducing the cost and the consumption of electricity in transmission and distribution networks, using a hybrid system powered by solar and wind sources, as well as integrating storage devices. This paper reviews and discusses the Micro- Grid Model with PI controller and neural network for power quality enhancement. Then, a comparative study of different battery types used for large-scale electricity storage is carried out, followed by a review of control strategies. In this research work, designed a model in MATLAB 2015A, indicating all the power quality parameters.

scholarly journals Enhancing Power Quality in PV-SOFC Microgrids Using Improved Particle Swarm Optimization

2019 ◽  
Vol 9 (5) ◽  
pp. 4616-4622
Author(s):  
V. V. Prabhakaran ◽  
A. Singh
Keyword(s):  
Particle Swarm Optimization ◽  
Power Systems ◽  
Power Quality ◽  
Electricity Markets ◽  
Large Scale ◽  
Control Strategies ◽  
Particle Swarm ◽  
Voltage Source ◽  
Swarm Optimization ◽  
Improved Particle Swarm Optimization

The concept of hybrid microgrid (MG) has attracted tremendous attention in modern electricity markets, owing to the enhanced efficiency and reliability it offers to the main electricity grid. Numerous meritorious aspects associated with hybrid MGs are the key features of future large scale renewable technologies. In this paper, a hybrid MG using PV-SOFC (PhotoVoltaic – Solid Oxide Fuel Cell) is connected to an infinite bus bar, in order to achieve an autonomous working mode. The dynamic and steady-state operation with control strategies for both PV and SOFC power systems are analyzed. The objective is to control the voltage and frequency of the MG when it is not connected to the main grid. Typically, an efficient control strategy must assess the power conversion system and its state, in the isolated MG. Moreover, it must reliably handle variant and intermittent type of loads. With this viewpoint, we propose a Voltage Source Inverter (VSI) based Proportional Integral (PI) controller, optimized by Improved Particle Swarm Optimization (IPSO) for the purpose of smooth power flow control improving power quality. The performance of PI-IPSO and PI technologies are evaluated, for the proposed MG, in MATLAB/Simulink. The results obtained verify the effectiveness of the modified PSO algorithm, in comparison to the conventional PI techniques, for the frequency and voltage control of the MG.

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