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 Power Quality and Performance Analysis of Grid-Connected Solar PV System Based on Recent Grid Integration Requirements

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Estifanos Abeje Sharew ◽  
Habtemariam Aberie Kefale ◽  
Yalew Gebru Werkie
Keyword(s):  
Power Quality ◽  
High Harmonic ◽  
Harmonic Distortion ◽  
Distribution Networks ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System ◽  
Maximum Penetration ◽  
The Impact

The electrical energy demand is steadily growing, and hence, the integration of photovoltaic system to the distribution networks is also dramatically increasing though it has a significant effect on the network’s power quality. The purpose of this paper is to analyze the impact of solar PV integration on the power quality of distribution networks. The study is conducted using ETAP software, taking one of the radial distribution networks available in Bahir Dar city during the peak of connected loads which has the least voltage profile. Furthermore, the optimal location of the PV in the network is done using particle swarm optimization. Accordingly, the appropriate location of the PV system is determined to be the farthest end bus (bus 34). Also, the impact in terms of voltage and current harmonic distortion on the distribution feeder network is comparatively discussed by comparing the distribution system parameters with different penetration levels of solar PV system. The simulation results obtained demonstrate that high harmonic distortion level is injected correspondingly as the penetration capacity of PV system increased which indicates that the solar PV system should be integrating only up to a maximum possible capacity the network can carry. The integration of the PV system beyond this maximum penetration level causes production of high harmonic distortion which adversely affects the system performance. At the maximum penetration level which allows the acceptable harmonic distortion limit, the total voltage harmonic distortion and current demand distortion are found to be 4.97% and 14.98%, respectively.

scholarly journals A Linear Regression Model for THD Sensitivity in PV Based Microgrid with Varying Insolation Levels

2022 ◽  
pp. 179-186
Author(s):  
Yuvraj Praveen Soni ◽  
Eugene Fernandez
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Solar Irradiance ◽  
Harmonic Distortion ◽  
System Control ◽  
Solar Pv ◽  
Pv System ◽  
Simulink Model ◽  
The Impact

Solar PV systems can be used for powering small microgrids in rural area of developing countries. Generally, a solar power microgrid consists of a PV array, an MPPT, a dc-dc converter and an inverter, particularly as the general loads are A.C in nature. In a PV system, reactive current, unbalancing in currents, and harmonics are generated due to the power electronics-based converters as well as nonlinear loads (computers induction motors etc). Thus, estimation of the harmonics levels measured by the Total Harmonic Distortion (THD) is an essential aspect of performance assessment of a solar powered microgrid. A major issue that needs to be examined is the impact of PV system control parameters on the THD. In this paper, we take up this assessment for a small PV based rural microgrid with varying levels of solar irradiance. A Simulink model has been developed for the study from which the THD at equilibrium conditions is estimated. This data is in turn used to design a generalized Linear Regression Model, which can be used to observe the sensitivity of three control variables on the magnitude of the THD. These variables are: Solar Irradiance levels, Power Factor (PF) of connected load magnitude of the connected load (in kVA) The results obtained show that the greatest sensitivity is obtained for load kVA variation.

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.

scholarly journals Study of Renewable Energy Penetration on a Benchmark Generation and Transmission System

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 169
Author(s):  
Oluwaseun M. Akeyo ◽  
Aron Patrick ◽  
Dan M. Ionel
Keyword(s):  
Transmission System ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System ◽  
Bus Voltage ◽  
Pv Penetration ◽  
Traditional Approaches ◽  
Generation Dispatch ◽  
The Impact ◽  
Solar Penetration

Significant changes in conventional generator operation and transmission system planning will be required to accommodate increasing solar photovoltaic (PV) penetration. There is a limit to the maximum amount of solar that can be connected in a service area without the need for significant upgrades to the existing generation and transmission infrastructure. This study proposes a framework for analyzing the impact of increasing solar penetration on generation and transmission networks while considering the responses of conventional generators to changes in solar PV output power. Contrary to traditional approaches in which it is assumed that generation can always match demand, this framework employs a detailed minute-to-minute (M-M) dispatch model capable of capturing the impact of renewable intermittency and estimating the over- and under-generation dispatch scenarios due to solar volatility and surplus generation. The impact of high solar PV penetration was evaluated on a modified benchmark model, which includes generators with defined characteristics including unit ramp rates, heat rates, operation cost curves, and minimum and maximum generation limits. The PV hosting capacity, defined as the maximum solar PV penetration the system can support without substantial generation imbalances, transmission bus voltage, or thermal violation was estimated for the example transmission circuit considered. The results of the study indicate that increasing solar penetration may lead to a substantial increase in generation imbalances and the maximum solar PV system that can be connected to a transmission circuit varies based on the point of interconnection, load, and the connected generator specifications and responses.

scholarly journals AI based MPPT Controller for Solar PV System

2019 ◽  
Vol 9 (2S4) ◽  
pp. 592-595
Keyword(s):  
Low Voltage ◽  
Photovoltaic System ◽  
Solar Pv ◽  
Pv System ◽  
Boost Converters ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Logic Control ◽  
Solar Pv System ◽  
Power Point

This article discusses Artificial intelligence based Maximum Power Point Tracking (MPPT) for solar Photo-voltaics based system. MPPT is used to improve the efficiency as well as to raise the output through the photovoltaic system through continuous tracking of MPP. The work demands the use of fuzzy logic control technology; hence the PV-cell is interfaced with a DC step-up converter connected with a dc load. Boost converters convert the output of low voltage DC to output of high voltage DC. Following taken through the solar panel are thermal factor like temperature and isolation. The validation of the proposed controller is also discussed.

Increasing the Productivity of Solar Photovoltaic Systems

Solar Energy ◽  
2006 ◽  
Author(s):  
David A. Torrey ◽  
James M. Kokernak
Keyword(s):  
Energy Production ◽  
Solar Pv ◽  
Pv System ◽  
System Productivity ◽  
Array Configuration ◽  
Pv Systems ◽  
Solar Pv System ◽  
Partial Shade ◽  
The Impact

State-sponsored incentives have played a significant role in driving the demand for residential and small commercial photovoltaic (PV) systems. All state incentive programs are tied to the power rating of the system, though some states also offer energy production incentives. Unfortunately, there is a disconnect between the power rating of a PV system and the energy that system produces over its lifetime. It is extremely important to consider system productivity, which goes well beyond the efficiency of the components. System productivity is tied directly to the structure of the array, not just the efficiency of the components and the quality of the installation. This paper examines the issues associated with improving solar PV system productivity. The focus is on comparing a series-parallel array configuration to a series-string array configuration and the impact on energy production. Partial shade is used to highlight substantial differences between the operation of the two array configurations.

scholarly journals Modelling and analysis of grid-connected solar-PV system through current-mode controlled VSC

2020 ◽  
Vol 167 ◽  
pp. 05005
Author(s):  
Elsayed Saad ◽  
Yasser Elkoteshy ◽  
Usama AbouZayed
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Current Mode ◽  
Electrical Energy ◽  
Solar Pv ◽  
Pv System ◽  
Load Variations ◽  
Three Phase ◽  
Solar Pv System ◽  
Voltage Sourced Converter

Recently, solar-PV energy becomes one of the most vital renewable resources of electrical energy as it is utilized in all life applications. In case of connecting the solar-PV system with the utility grid a voltage-sourced converter (VSC) is required to convert the extracted solar-PV array’s DC power into AC. There are many methods to dominate the active and reactive power produced from the VSC. In the following model we use the current mode control as it has some features such as highly output accuracy, protection against over current troubles, robustness against AC side voltage and load variations. As the produced power from the solar cells is intermittent, the point of maximum power has to be tracked using an MPPT technique. Also, in order to reduce the system harmonics a filter must be implemented in the model. In this paper, a complete model of 50KW grid-connected solar-PV system using current-mode controlled two-level three-phase VSC (grid imposed frequency VSC) is implemented. Also, the Incremental Conductance model to track the point of maximum available power (MPPT) and LCL filter has been provided into the system with total harmonic distortion (THD) analysis in PSCAD/EMTDC

scholarly journals A Charge Controller Techniques for Solar PV System

2019 ◽  
Vol 8 (6S3) ◽  
pp. 2015-2017
Keyword(s):  
Power Flow ◽  
Low Voltage ◽  
New Technology ◽  
Control Unit ◽  
World Market ◽  
Battery Management ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System ◽  
A Charge

In rural electrification the PV system plays an important role. Due to high costs in individual PV battery structures and large number of available lunar charge controllers it is important to select a suitable controller for each application. The overall system power flow is regulated by the special control unit is that charge controllers. This solar battery charger has normalize the potential difference and current flows in house-hold applications, multiple energy sources and converters which converts DC electric charge into AC. Several topologies dominate the world market. The solar charge controller has to protect the battery to charge it too much and avoid discharging with bottom value by using the low voltage and high voltage disconnection (LVD&HVD). In addition to this a charge regulator should have to monitoring the battery status. The state of charge calculation of this solar PV charge controller is good and it provides better battery management. The charge controller of solar PV system consists of shunt and series charge controller. A new technology based solar PV system controller is discussed in this paper. This controller is developed using MATLAB/SIMULINK

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).

scholarly journals Study Solar Energy Usage and Evaluation Activities around Bahir Dar, Ethiopia

2021 ◽  
Author(s):  
ADDISU WORKU BEZABIH
Keyword(s):  
Solar Energy ◽  
Power Systems ◽  
Large Scale ◽  
Public Awareness ◽  
Impact Factors ◽  
Solar Pv ◽  
Pv System ◽  
Standard Design ◽  
Mathematical Formulas ◽  
The Impact

Abstract Although solar energy is abundant, accessible, affordable, and ecologically and environmentally friendly, in rural Ethiopia, the majority of Households are still using pollutant kerosene for lighting. The researcher assess factors that influence dissemination activities, like solar PV installation practices, house and institutional system distribution strategies, system failures, and their causes. Additionally, The researcher analyzed the impact of PV orientation, comparing the simulation results currently performed by the PVsyst software with different angles observed during the sphere survey. This made it possible to influence the dissemination activity factors and, therefore, the best orientation. The study also assessed how access to alter, maintenance, lack of public awareness building, institutional problems, tariffs, and lack of a market could affect PV system access and large-scale distribution. To distribute a sufficient amount of solar PV across the country, this study recommends that consideration of distribution impact factors be considered in the most negligible levels to realize maximum results. The PV system could be a tilt at angles of 160 and 00 azimuths; supported by this method, the PV system can collect a mean of 5.36 kW/m2daily, which implies 1929.6 kW/m2/year. This was the vision that the researcher wish to possess a sustainable supply of energy within the country and reduce emissions from biomass.Thus, adapting standard design practices of mathematical formulas, experimental and PVsyst methods through numerical simulation is critical to identifying ways to enhance the efficiency and reliability of stand-alone PV power systems for further practicality within the region.

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