تأثير إضافة متسعات التوالي ومحولات إزاحة الطور على أداء منظومة القدرة

Jan 1, 2016

Journal Tikrit Journal of Engineering Sciences

DOI DOI: https://doi.org/10.24237/djes.2024.17104

Issue 4

Volume 23

Promoting power system performance is regarded as one of the essential issues for a sustainable customer service, alongside with the expansion of the inductive loads and population increase. The study aims to improve and promot power system performance by using series capacitors and phase – shifting transformers. The capacitors and transformers are used separately in the system, then they are used together in two separate lines for two load cases: the base load and the increasing the base load 25%. The system power flow has been examined by utilizing Matlab version 7.6. The study shows that the efficiency of both series capacitors and phase – shifting transformers in improving line loadability, whether used together or separately. The highest rate for improving line loadability was 53.15% when using series capacitor in the line 1 – 5. As for the transformer, the highest rate was 53.25% in the line 11–5. The study has also shown that adding series capacitor and phase–shifting transformer simultaneously to the system is more efficient in promoting and improving system performance than adding them separately. The current study has been applied on the test system IEEE with 14 buses and 20 transmission lines.

PEM Fuel Cell Powered Multilevel Converter

Nov 1, 2018

Journal Anbar Journal for Engineering Sciences

DOI 10.37649/aengs.2018.147746

Issue 3

Volume 7

Nowadays, renewable energy sources are becoming further utilized to produce electricity. Fuel cell (FC) is one of the encouraging renewable and sustainable power resources as a result of its high power density and extremely low release. This paper presents suggestion and implementation of FC power system. So as to design a greatly efficient FC power system, proper DC - DC and DC - AC converters are needed. Among the different types of DC - DC converters, Interleaved Boost Converter (IBC) has been proposed as appropriate interface between FC and the next stage to transform the produced power energy (low voltage high current input into a high voltage low current output of the FC). 11-level Neutral Point Clamped (NPC) Multilevel Converter (MLC) is proposed for converting the DC output of the IBC to AC voltage to feed the load. MLC is chosen because it has many attractive features like high voltage capability, smaller or even no output filter, low voltage stress on load. Simulation of the proposed FC power system has been performed using MATLAB/SIMULINK..

Simulation of the Incremental Conductance Algorithm for Maximum Power Point Tracking of Photovoltaic System Based On Matlab

Mar 1, 2019

Journal DIYALA JOURNAL OF ENGINEERING SCIENCES

DOI DOI: https://doi.org/10.24237/djes.2019.12105

Issue 1

Volume 12

Due to the urgent need to make maximum use of electrical power generated from the Photo-Voltaic System (PVS) solar panels, several techniques have been developed for this purpose. Maximum Power Point Tracking (MPPT) algorithm raises the efficiency of PVS’s. Simulation of the complete (PVS) possesses the ability of MPPT is present in this paper. The approved PVS consists of a PV array, DC-DC Boost Converter and MPPT algorithm using Incremental Conductance Method (INC). All parts of the system were simulated programmatically using MATLAB. The obtained Results showed the efficiency of the algorithm used to extract the maximum power regardless of changes in solar radiation and cell’s temperature.

Performance of PV panel under shaded condition

Sep 14, 2021

Journal NTU JOURNAL FOR RENEWABLE ENERGY

DOI https://doi.org/10.56286/ntujre.v1i1.25

Issue 1

Volume 1

One of the most important technical aspects to consider during the technical study and practical installation of the solar panels is choosing the location of the solar panels, Because it's probable that some of its cells will be shaded. PV characteristics become more complex under partial shade situations, with several peaks.Partial shading affects the performance of the solar cell in proportion to the state of shadow; this negative performance will be reflected on the current generated by the solar cell; of the current value of the other cells (being connected in series) which will decrease the overall performance of the solar panel. The goal of this study is to demonstrate the impacts of partial shade on a PV array by analyzing various shading situations.First, this is doneusing Matlab/Simulink.

Predictive Current Control of Voltage Source Inverters Using a Discrete-Time Model

Jun 15, 2023

Journal Journal Européen des Systèmes Automatisés

DOI https://doi.org/10.18280/jesa.560306

Issue 3

Volume 56

In this investigation, the most popular multilevel inverter topologies and control approaches have been analyzed. The various benefits, such as low power dissipation on power switches, low harmonic contents, and low Electromagnetic Interference (EMI) outputs, Multilevel Inverter Topologies (MLIs) are finding more and more usage in medium and high-power applications. An optimization tool for the layout of a three-phase Voltage Source Inverter (VSI) using a diode-based rectifier has been created. For general-purpose industrial motor drives that use three-phase Alternating Current (AC), the Pulse Width Modulation (PWM) voltage source inverter with diode front-end rectifier has emerged as the converter of choice. This study discusses the implementation of predictive current control in a voltage source inverter. This technique makes use of a discrete-time model of the system to foresee the load current for every conceivable inverter-generated voltage vector. The voltage vector is chosen that minimizes a quality function. In this study, we use a quality function that measures the current error at the next sample interval. It is compared to hysteresis control and pulse width modulation control to see how well the suggested predictive control approach performs. The results demonstrate that the predictive strategy manages load current extremely well and outperforms traditional methods.

Optimal PV array configurations for partial shading conditions

Oct 1, 2023

Journal Indonesian Journal of Electrical Engineering and Computer Science

DOI DOI: 10.11591/ijeecs

Issue 1

Volume 32

Increasing the effectiveness of photovoltaic (PV) power generation systems is a major barrier to their widespread use. Partial shading conditions (PSCs), which are caused by nearby objects like trees, buildings, and clouds, reduce the energy produced by PV systems and may be mitigated by the reconfiguration of PV arrays. A novel approach dubbed a modified seriesparallel (MSP) setup, was suggested in this paper and compares its performance to four PV configuration strategies: series-parallel (SP), totalcross-tied (TCT), bridge-linked (BL), and honey-comb (HC). A 3× 3 solar array is used in five partial shading arrangements. MATLAB/Simulink simulates all shading conditions. This study indicated that MSP delivers high performance and is superior to all other configurations in terms of maximum power in even and uneven row-shaded cases. in the case of an even column shaded, the performance of (SP, BL, HC, and TCT) was equal in terms of the maximum power obtained, while MSP was the least in comparison. the performance of the TCT configuration was the best compared to the other configuration when shading the PV system vertically unevenly. Finally, for diagonal shading, TCT and MSP configurations work best. Shading loss, mismatch loss and fill factor (FF) results were also compared.

Enhancing PV Power Extraction Under Partial Shading Condition with Shade Dispersion Strategy

Mar 1, 2024

Journal Diyala Journal of Engineering Sciences

DOI DOI: https://doi.org/10.24237/djes.2024.17104

Issue 1

Volume 17

Improving photovoltaic (PV) system efficiency is a popular field of research. Partial shading (PS) adversely impacts the solar system's output power, which considerably reduces the system's efficiency. As a result, this issue has been the subject of extensive investigation. When sunlight is blocked off of photovoltaic cells in a PV array, panel, or module, it is referred to as shading. Using a method that involves spreading shade throughout the PV array is one of the suggested fixes for this issue. This study compares the performance of a shade dispersion method to different PV array configurations under different partial shading circumstances, and it looks at how effective it is in a 3x3 PV system. MATLAB/Simulink is used for the evaluation. To achieve this, shade dispersion-based TCT (SD-TCT) under various shading scenarios has been compared to the current standard designs, which include series-parallel (SP), Honey-Comb (HC), Bridge-Linked (BL), and Total Cross-Tied (TCT). Based on the global maximum power (GMPP), mismatch power losses, fill factor (FF), percentage power losses (PL%), and PV system efficiency, the efficacy of the shade dispersion technique was assessed. For every partial shading condition (PSC) that was studied, the SD-TCT configuration outperforms the other setups in terms of fill factor and power loss.

Modelling and Simulation of three phase inverter feed from Wind Turbine based Matlab/Simulink

Mar 1, 2017 - Mar 2, 2017

Country Iraq

Location Southern Technical University