scholarly journals Mitigation of load side harmonic distortion in standalone photovoltaic based microgrid

2021 ◽  
Vol 304 ◽  
pp. 01010
Author(s):  
Adel Aljwary ◽  
Ziyodulla Yusupov ◽  
Olimjon Toirov ◽  
Rustam Shokirov
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Energy Resources ◽  
Power Electronic ◽  
Solar Pv ◽  
Distributed Energy ◽  
Pv System ◽  
Simulation Results

Photovoltaic (PV) system as one part of distributed energy resources is becoming an alternative for low and medium distribution network of microgrid. By the reason of a wide implementation of power electronic and non-linear loads, harmonics distortion is one of the main problems for the power systems. There are several filter types to mitigate the harmonics. The passive filter is distinguished by its simplicity and economical options from another filters. In this paper, the passive single tuned filter (STF) is used to minimize harmonics distortion in standalone PV based microgrid. A solar PV array is modelled as an ideal single diode model (ISDM) and used to supply electrical power to an AC load. The simulation results are executed on MATLAB/Simulink show that STF is effective in mitigating the voltage total harmonic distortion (VTHD) and the current total harmonic distortion (ITHD) with enhancing the output power quality.

An Optimal Photovoltaic Conversion System for Future Smart Grids

2018 ◽  
pp. 601-657 ◽  
Author(s):  
Carlo Makdisie ◽  
Badia Haidar ◽  
Hassan Haes Alhelou
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Smart Grids ◽  
Electrical Power ◽  
Solar Pv ◽  
Pv System ◽  
Electrical Power Systems ◽  
Active Power Line Conditioner ◽  
Neuro Fuzzy ◽  
Unbalanced Loads

Smart grid technology is the key for a reliable and efficient use of distributed energy resources. Amongst all the renewable sources, solar power takes the prominent position due to its availability in abundance. In this chapter, the authors present smart grid infrastructure issues and integrating solar PV-sourced electricity in the smart grid. Smart grid has many features, including reliability, flexibility on network topology, efficiency, sustainability, and market-enabling. The authors select a photovoltaic active power line conditioner as a case study. This line conditioner is a device designed to extract the maximum power of a photovoltaic (PV) system and to compensate the nonlinear and unbalanced loads of the electrical power systems. The performance of the PV conditioner with the neuro-fuzzy control designed has been analyzed through a simulation platform.

scholarly journals A Review of Total Harmonic Distortion Factors for the Measurement of Harmonic and Interharmonic Pollution in Modern Power Systems

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6467
Author(s):  
Angel Arranz-Gimon ◽  
Angel Zorita-Lamadrid ◽  
Daniel Morinigo-Sotelo ◽  
Oscar Duque-Perez
Keyword(s):  
Power Systems ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Electronic Systems ◽  
International Electrotechnical Commission ◽  
Power Electronic ◽  
Electrical System ◽  
Electrical Systems ◽  
Wide Range

Harmonic distortion is one of the disturbances that most affects the quality of the electrical system. The widespread use of power electronic systems, especially power converters, has increased harmonic and interharmonic emission in a wide range of frequencies. Therefore, there are new needs in the measurement of harmonic distortion in modern electrical systems, such as measurement in the supra-harmonic range (>2 kHz) and the measurement of interharmonics. The International Electrotechnical Commission (IEC) standards define new total harmonic distortion (THD) rates based on the concept of frequency groupings. However, the rates defined in the IEC standards have shortcomings when measuring signals such as those present in the outputs of power systems with abundant interharmonic content and presence of components in the supra-harmonic range. Therefore, in this work, a comparison is made between the different THD factors currently defined, both in the literature and in the standards, to show which of them are the most suitable for assessing harmonic and interharmonic contamination in power system signals such as those present at the output of inverters.

scholarly journals Stand-alone PV system with MPPT function based on fuzzy logic control for remote building applications

2019 ◽  
Vol 10 (2) ◽  
pp. 842 ◽  
Author(s):  
Hussain A. Attia ◽  
Fernando DelAma Gonzalo
Keyword(s):  
Fuzzy Logic ◽  
Power Systems ◽  
Fuzzy Logic Controller ◽  
Electrical Power ◽  
Good Alternative ◽  
Solar Pv ◽  
Pv System ◽  
Single Phase Inverter ◽  
And Performance ◽  
Power Point

<p align="LEFT"><span>Due to the limitations of reaching the grid utility to remote area, such as rural and/or countryside areas.  Stand-alone photovoltaic power systems represent good alternative that it can be adapted for electrical power delivering to these areas. In this paper, a new design of stand-alone solar system suitable for individual building application is presented. This study focuses on proposing a desired solar PV panels matrix arrangement and connection, in addition to presenting an accurate design of Buck-Boost DC-DC converter which controlled by fuzzy logic controller FLC. The controller guarantees the maximum Power Point working conditions and manipulates the fluctuation of the DC link voltage of the matrix due to the weather changing. The main system includes battery bank charger, single phase inverter, and passive power filter. This study addresses the design and performance analysis the DC side of the 7.85 kW PV system. The system performance is evaluated through MATLAB/Simulink results which reflected the promising indications as an effective system for rural individual stand-alone building applications. </span></p>

An Optimal Photovoltaic Conversion System for Future Smart Grids

2022 ◽  
pp. 551-606
Author(s):  
Carlo Makdisie ◽  
Badia Haidar ◽  
Hassan Haes Alhelou
Keyword(s):  
Smart Grid ◽  
Power Systems ◽  
Smart Grids ◽  
Electrical Power ◽  
Solar Pv ◽  
Pv System ◽  
Electrical Power Systems ◽  
Active Power Line Conditioner ◽  
Neuro Fuzzy ◽  
Unbalanced Loads

Smart grid technology is the key for a reliable and efficient use of distributed energy resources. Amongst all the renewable sources, solar power takes the prominent position due to its availability in abundance. In this chapter, the authors present smart grid infrastructure issues and integrating solar PV-sourced electricity in the smart grid. Smart grid has many features, including reliability, flexibility on network topology, efficiency, sustainability, and market-enabling. The authors select a photovoltaic active power line conditioner as a case study. This line conditioner is a device designed to extract the maximum power of a photovoltaic (PV) system and to compensate the nonlinear and unbalanced loads of the electrical power systems. The performance of the PV conditioner with the neuro-fuzzy control designed has been analyzed through a simulation platform.

scholarly journals Reduced Switches Count of Five Level H-bridge Inverter with Integrated Boost Converter in Solar PV System

2021 ◽  
Vol 9 (11) ◽  
pp. 1243-1252
Author(s):  
Dr. T. Murali Mohan
Keyword(s):  
Energy Demand ◽  
Harmonic Distortion ◽  
Boost Converter ◽  
Total Harmonic Distortion ◽  
Control Technique ◽  
Duty Ratio ◽  
Solar Pv ◽  
Pv System ◽  
Integrated Boost ◽  
Solar Pv System

Abstract: PV systems are becoming more popular now a days, due to increase in the energy demand and it also reduces the environment pollution around the world. This paper proposes a reduced switches count of five-level H-bridge inverter with integrated boost converter in solar PV system. The proposed 5-level reduced switches count H-bridge MLI configuration requires less no.of power semiconductor devices compared to that of conventional MLI topology. In this paper INC MPPT control technique is used, which provides a duty ratio for controlling dc-dc boost converter and allowing the PV cells to operate more efficiently and extract maximum solar energy. The phase shifted sinusoidal pulse width modulation (PSCPWM) control technique is used for controlling the gating pulse of 5-level reduced switches H-bridge inverter. To improve the quality of PV based 5-level reduced switches h-bridge inverter output parameters mainly contribute switching losses and total harmonic distortion. The proposed model is modeled and simulated in MATLAB/SIMULINK software. Keywords: PV array, H-bridge multilevel inverter, boost converter, phase shifted PWM, maximum power point tracking (MPPT), incremental conductance, total harmonic distortion (THD).

Impact of On-Grids Solar PV Rooftop on Low Voltage Grid Systems: A Case Study of PEA Udonthani, Thailand

2015 ◽  
Vol 781 ◽  
pp. 296-299 ◽  
Author(s):  
Weerachat Khuleedee ◽  
Arkom Kaewrawang ◽  
Kittipong Tonmitr
Keyword(s):  
Power Systems ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Frequency Variation ◽  
Local Power ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System ◽  
Thai Government ◽  
The Impact

This paper presents the impact of on-grid solar PV rooftop on local power systems of 10 kW - typical low voltage power rating for households campaigned by Thai Government. The overvoltage, frequency variation and harmonic contamination was investigated and analyzed. The condition of peak power generated from PV was also considered. The experimental data used for the analysis were collected by turning on and off the solar PV system of PEA power system on Udonthani province, Thailand for every hour with duration time between 6.00 AM and 6.00 PM. The results showed that the voltage at the connecting point of solar PV rooftop to the grid increases from 5-8 V (2.3-3.6%.).The frequency slightly increases from 49.97-50.06 Hz. In addition, the total harmonic distortion is not significantly different - varying in narrow range of 0.1-0.2 VTHD.

scholarly journals Risk-Averse Scheduling of Combined Heat and Power-Based Microgrids in Presence of Uncertain Distributed Energy Resources

2021 ◽  
Vol 13 (13) ◽  
pp. 7119
Author(s):  
Abbas Rabiee ◽  
Ali Abdali ◽  
Seyed Masoud Mohseni-Bonab ◽  
Mohsen Hazrati
Keyword(s):  
Electrical Energy ◽  
High Energy ◽  
Combined Heat And Power ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Solar Pv ◽  
Distributed Energy ◽  
Robust Scheduling ◽  
Battery Energy ◽  
The Impact

In this paper, a robust scheduling model is proposed for combined heat and power (CHP)-based microgrids using information gap decision theory (IGDT). The microgrid under study consists of conventional power generation as well as boiler units, fuel cells, CHPs, wind turbines, solar PVs, heat storage units, and battery energy storage systems (BESS) as the set of distributed energy resources (DERs). Additionally, a demand response program (DRP) model is considered which has a successful performance in the microgrid hourly scheduling. One of the goals of CHP-based microgrid scheduling is to provide both thermal and electrical energy demands of the consumers. Additionally, the other objective is to benefit from the revenues obtained by selling the surplus electricity to the main grid during the high energy price intervals or purchasing it from the grid when the price of electricity is low at the electric market. Hence, in this paper, a robust scheduling approach is developed with the aim of maximizing the total profit of different energy suppliers in the entire scheduling horizon. The employed IGDT technique aims to handle the impact of uncertainties in the power output of wind and solar PV units on the overall profit.

scholarly journals An Advanced Control Technique for Power Quality Improvement of Grid-Tied Multilevel Inverter

2021 ◽  
Vol 13 (2) ◽  
pp. 505
Author(s):  
Sumaya Jahan ◽  
Shuvra Prokash Biswas ◽  
Md. Kamal Hosain ◽  
Md. Rabiul Islam ◽  
Safa Haq ◽  
...  
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Control Technique ◽  
Solar Pv ◽  
Pv System ◽  
Reference Tracking ◽  
Proportional Integral ◽  
Lead Compensator ◽  
Power Quality Improvement

The use of different control techniques has become very popular for controlling the performance of grid-connected photovoltaic (PV) systems. Although the proportional-integral (PI) control technique is very popular, there are some difficulties such as less stability, slow dynamic response, low reference tracking capability, and lower output power quality in solar PV applications. In this paper, a robust, fast, and dynamic proportional-integral resonance controller with a harmonic and lead compensator (PIR + HC + LC) is proposed to control the current of a 15-level neutral-point-clamped (NPC) multilevel inverter. The proposed controlled is basically a proportional-integral resonance (PIR) controller with the feedback of a harmonic compensator and a lead compensator. The performance of the proposed controller is analyzed in a MATLAB/Simulink environment. The simulation result represents admirable performance in terms of stability, sudden load change response, fault handling capability, reference tracking capability, and total harmonic distortion (THD) than those of the existing controllers. The responses of the inverter and grid outlets under different conditions are also analyzed. The harmonic compensator decreases the lower order harmonics of grid voltage and current, and the lead compensator provides the phase lead. It is expected that the proposed controller is a dynamic aspirant in the grid-connected PV system.

scholarly journals Cybersecurity Considerations for Grid-Connected Batteries with Hardware Demonstrations

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3067
Author(s):  
Megan Culler ◽  
Hannah Burroughs
Keyword(s):  
Power Systems ◽  
Network Connectivity ◽  
Energy Resources ◽  
System Stability ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Defense Strategies ◽  
Storage Devices ◽  
Attack Surface ◽  
Area Of Concern

The share of renewable and distributed energy resources (DERs), like wind turbines, solar photovoltaics and grid-connected batteries, interconnected to the electric grid is rapidly increasing due to reduced costs, rising efficiency, and regulatory requirements aimed at incentivizing a lower-carbon electricity system. These distributed energy resources differ from traditional generation in many ways including the use of many smaller devices connected primarily (but not exclusively) to the distribution network, rather than few larger devices connected to the transmission network. DERs being installed today often include modern communication hardware like cellular modems and WiFi connectivity and, in addition, the inverters used to connect these resources to the grid are gaining increasingly complex capabilities, like providing voltage and frequency support or supporting microgrids. To perform these new functions safely, communications to the device and more complex controls are required. The distributed nature of DER devices combined with their network connectivity and complex controls interfaces present a larger potential attack surface for adversaries looking to create instability in power systems. To address this area of concern, the steps of a cyberattack on DERs have been studied, including the security of industrial protocols, the misuse of the DER interface, and the physical impacts. These different steps have not previously been tied together in practice and not specifically studied for grid-connected storage devices. In this work, we focus on grid-connected batteries. We explore the potential impacts of a cyberattack on a battery to power system stability, to the battery hardware, and on economics for various stakeholders. We then use real hardware to demonstrate end-to-end attack paths exist when security features are disabled or misconfigured. Our experimental focus is on control interface security and protocol security, with the initial assumption that an adversary has gained access to the network to which the device is connected. We provide real examples of the effectiveness of certain defenses. This work can be used to help utilities and other grid-connected battery owners and operators evaluate the severity of different threats and the effectiveness of defense strategies so they can effectively deploy and protect grid-connected storage devices.

scholarly journals Energy Sustainability Study of a Rural ICT Telecenter at the Bario Highland

2007 ◽  
Author(s):  
Mohammad Omar Abdullah ◽  
Voon Chun Yung ◽  
Audra Anak Jom ◽  
Alvin Yeo Wee ◽  
Martin Anyi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Power Systems ◽  
Alternative Energy ◽  
Cost Effective ◽  
Energy Resources ◽  
Successful Implementation ◽  
Combined System ◽  
Pv System ◽  
Simple Method

The eBario project has won the eAsia Award and the Mondialogo Engineering Award in 2004 and 2005 respectively for it’s successful implementation of an Information and Telecommunications Technology Center (ICT) and solar renewable energy-incentive rural community project at the Bario Highland of Sarawak, East Malaysia, Borneo (http://www.unimas.my/ebario/). Although solar photovoltaic (PV) energy has been opted for power generation at the ICT Telecenter for the past five years, there is still a need to investigate the cost-effectiveness of the current energy setup as well as to conduct sustainability study taking into account factors such as system efficiency, weather, costs of fuel, operating costs, as well as to explore the feasibility of implementing alternative energy resources for the rural ICT Telecenter. Recent theoretical study conducted has shown that renewable combined power systems are more sustainable in terms of supplying electricity to the ICT Telecenter, and in a more cost-effective way compared to a standalone PV system which is subject to the cloud and the recent dense haze problems. For that purpose, two combined power systems are being put into consideration namely PV-Hydro and PV-Hydro-Fuel Cell, where the total simulated annualized cost for these two system configurations are US$10,847 and US$76,010 respectively as far as the present location is concerned. The PVHydro-Fuel Cell produces electrical energy at the amount of 3,577 kWh/yr while the annual energy consumption is 3,203 kWhr/yr. On the other hand, PV-Hydro produces 3,789 kWhr/yr of electricity annually load which consumes energy at 3,209 kWhr/yr. Results thus obtained has shown that the PVHydro scheme is expected to have advantages over the existing PV standalone system. Firstly, it is more cost-effective. Secondly, it provides the best outcomes for the local indigenous community and the natural highland environments both for now and the future. Thirdly, it also able to relate the continuity of both economic and social aspects of the local society as a whole. As the combined PV-Hydro system had been chosen, plus for completeness purposes, the present paper also discussed the custom design and construction of a small waterwheel breast-shot hydro-generator, suited to the local location and existing water energy resources. Energy saving design calculations and Sankey diagram showing the energy flows for the new combined system are also given herein. Finally, the energy system performance equations and the performance curves introduced in this study provide a new simple method of evaluating renewable energy systems.

Sign in / Sign up

Export Citation Format

Share Document