Studying the Effect of Non-Linear Loads Harmonics on Electric Generator Power Rating Selection

Sebaay, Ahmed El; Ramadan, Mahmoud; Adma, Maged A. Abu

doi:10.19044/esj.2017.v13n18p548

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…Derating is determined by the Taheri K-Factor method. [7] discussed the modeling and simulation of loading capability and hot-spot temperature on oil transformers during harmonic conditions. The model used is the dynamic thermal model and the IEEE Guide.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The increase in Total Harmonic Distortion (THD) affects the temperature increase, where the value of the multiplier constant for THD is obtained to obtain the percentage increase in the required transformer rating. [7] conducted a study by changing the percentage load of 3-phase dry transformers with a short-circuit test to determine the temperature distribution. The coil temperature measurement is carried out using a thermocouple, but it does not indicate the specific position of the thermocouple placement on the coil.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Analysis of loss on single-phase dry transformers with non-linear load

Khristiana

Soeparman

Wahyudi

et al. 2021

EEJET

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The paper studies power losses in transformers due to non-linear loads. The research aims to analyze the power loss in a single-phase dry transformer under a non-linear load. The research uses an SW43W Power supply type, FlukeView Power Quality Analyzer as a DC or AC power supply on the primary side of the transformer. The non-linear load is connected to the secondary side. The loading test of the dry transformer was carried out at non-linear loads. The load variations used 0 %; 12.5 %; 25 %; 37.5 %; 50 %; 62.5 %; 75 %; 87.5 % and 100 %, as well as variations in the THD value by adjusting the ignition angle (α). The non-linear loads used are Half-Wave Rectifier and Controlled Half-Wave Rectifier with resistive loads with variations in THD values. The results showed that the transformer losses comprised Pno load and Pload. The operation of the transformer with constant input voltage and frequency with THDv<5 % resulted in a constant Pno load value at all load values. The greater the percentage of the load, the higher the load. The increase in THD because of non-linear load will increase the load on the transformer. The value of the derating factor is obtained by connecting the increase in losses (∆PLosses), which is influenced by THD and the increase in temperature T(°C) in dry transformers. When the transformer is loaded with a non-linear load, the derating factor<1. THD and derating factor form a linear relationship, when THD increases, the derating factor value decreases. Linear load on the transformer causes a decrease in its capacity, but if it gets a non-linear load with THD=39.1 %, it can withstand a load of 84.294 %, besides the increase in total harmonic distortion will increase losses and reduce transformer capacity

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Analysis of loss on single-phase dry transformers with non-linear load

Khristiana

Soeparman

Wahyudi

et al. 2021

EEJET

View full text Add to dashboard Cite

show abstract

“…The non-linear load source are a rectifier, motor, computer, switched-mode power supplies, etc. In this simulation the non-linear load used is a three-phase full bridge rectifier [39], [40]. Table 2 contains the value of the components of the L filter, the utility grid, and the values of the parameters for the control subsystem including the parameter of SRF PLL, DSOGI PLL, and DSOGI PLL with filter.…”

Section: Simulation Of Synchronization On Three-phase Grid-connectmentioning

confidence: 99%

Improvement of DSOGI PLL Synchronization Algorithm with Filter on Three-Phase Grid-connected Photovoltaic System

Izah

Subiyanto

Prastiyanto

2018

indones.j.electron.telecommun.

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Synchronous Reference Frame Phase Locked Loop (SRF PLL) has been widely used for synchronization three-phase gridconnected photovoltaic (PV) system. On the grid fault, SRF PLL distorted by negative sequence component and grid harmonic that caused an error in estimating parameter because of ripple and oscillation. This work combined SRF PLL with Dual Second Order Generalized Integrator (DSOGI) and filter to minimize ripple and minimize oscillation in the phase estimation and frequency estimation. DSOGI was used for filtering and obtaining the 90 o shifted versions from the v αβ signals. These signals (v αβ ) were generated from three phase grid voltage signal using Clarke transform. The v αβ signal was the inputs to the positivesequence calculator (PSC). The positive-sequence v αβ was transformed to the dq synchronous reference frame and became an input to SRF-PLL to create the estimation frequency. This estimation frequency from SRF PLL was filtered by the low-pass filter to decrease grid harmonic. Moreover, the output of low-pass filter was a frequency adaptive. The performance of DSOGI PLL with filter is compared with DSOGI PLL, SRF PLL, and IEEE standard 1547(TM)-2003. The improvement of DSOGI PLL with filter gave better performances than DSOGI PLL and SRF PLLbecause it minimized ripples and oscillations in the phase and frequency estimations.

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“…Voltage and current outputs will be distorted at PCC by interlinking power electronic devices-based loads with grid. As a result, production of heat is increased and efficiency and lifespan of VS is also affected [23].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Voltage Source based Battery Energy Storage System in Microgrid to Improve Power Quality

Tariq

Mahmood

2021

PakJET

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Rising demand of renewable energy sources based distributed generation poses several challenges in utility grid operation. These shortcomings have been solved by microgrid. Power quality improvement is the main technical challenge in the applications of microgrid. Renewable energy sources can be integrated with microgrid in a better way by introducing a battery energy storage system. Power quality improvement, voltage and frequency regulation and catering the intermittency of renewable energy sources are few advantages of battery energy storage system. Integration of voltage source-based battery energy storage system in solar photovoltaic connected microgrid is presented in this paper. Voltage level between main grid and generation of solar power is maintained with the help of battery energy storage system. Power quality improvement ofintegrated microgrid system is done with control strategy of bidirectional converter used in battery energy storage system. Hysteresis band current controller is used in this paper to control the currents of battery energy storage system. It is a simple as well as robust technique for reduction of total harmonic distortion and voltage profile improvement as shown in the simulation results. Total harmonic distortion of system voltage is reduced 0.20%. This paper also presents the power flow to the loads using hysteresis band current controller and without using hysteresis band current controller. It is also shown by results that 45kVA is the most feasible rating of VS to deal with both linear and non-linear loads. MATLAB/SIMULINK environment is used to model and simulate the overall system performance.

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Studying the Effect of Non-Linear Loads Harmonics on Electric Generator Power Rating Selection

Cited by 8 publications

References 4 publications

Analysis of loss on single-phase dry transformers with non-linear load

Analysis of loss on single-phase dry transformers with non-linear load

Improvement of DSOGI PLL Synchronization Algorithm with Filter on Three-Phase Grid-connected Photovoltaic System

Modeling and Analysis of Voltage Source based Battery Energy Storage System in Microgrid to Improve Power Quality

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