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In this paper the performance of single phase transformer like voltage regulation, transformer losses, efficiency with different supplies such as continuous and discontinuous are carried out..This study is also shown graphically. In this project MATLAB/SIMULINK software is use for simulation.
Contexts in source publication
Context 1
... transformer magnetization curve is assumed to be linear [3]. Ideal transformer circuit diagram is shown in fig (1). The voltage developed by transformer action is given by For a transformer to be an ideal one, the various assumptions are as follows [4]: 1. Winding resistances are negligible. ...
Context 2
... Sinusoidal wave: During short circuit test when sinusoidal voltage waveform is applied to the transformer then the output current waveform is same as input current waveform having a current magnitude of 278.98amp as shown in figure 10. From simulation results it can be noted that when a transformer is operated with different types of supply then the output and input waveform are not same. ...
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Citations
... Transformer is a static device which transfers electrical energy from one circuit to another without change in frequency [3]. Most of the cases we see that the inputs given are sinusoidal wave only. ...
This paper presents analysis obtained for the design of single phase transformer. The method is simple, efficient and accurate, by an exhaustive analysis. The following constraints are imposed: excitation current, load fractions, efficiency and voltage regulations. The methodology of this paper requires only two input data: primary side of the transformer and the secondary side of the transformer. The input side of the transformer include the following parameters; voltage, current and power while the secondary side of the transformer includes; voltage, current, efficiency, voltage regulation. These data are included in the transformer nameplate. In this paper, the minimization of the following four objective functions is considered: total owing cost, mass, total losses and material cost was considered. The consideration of these four objective functions is implemented automatically by running the analysis several times without intervention of a designer. Consequently, transformer manufacturers save design man-hours and increase capacity. The optimized solutions of transformer design are validated with laboratory and process measurements. In this paper the simulation of single phase transformer with different supplies such as Load Test and efficiency of voltage regulation are carried out. Keywords: Exhaustive Analysis, Load Test, Ratio Test, Excitation Current, Voltage Regulation.
(1) (PDF) ANALYSIS OF LOAD TEST, TRANSFORMATION, TURNS RATIO, EFFICIENCY AND VOLTAGE REGULATION OF SINGLE PHASE TRANSFORMER. Available from: https://www.researchgate.net/publication/342658319_ANALYSIS_OF_LOAD_TEST_TRANSFORMATION_TURNS_RATIO_EFFICIENCY_AND_VOLTAGE_REGULATION_OF_SINGLE_PHASE_TRANSFORMER [accessed Jul 02 2021].
... Primary winding is taken the energy from the applied voltage and transferring it to th e load is called the secondary winding. In a transformer there are no movable parts so that, the efficiency is obtained with negligible amount of maintenance [1][2][3][4][5][6][7][8][9][10]. ...
Transformer is one of main components in electrical power system which role to increase or reduce voltage. Characteristics of transformer would be vital to ensure the voltage is fully transferred. A single-phase transformer is a type of power transformer that utilizes single-phase alternating current, meaning the transformer relies on a voltage cycle that operates in a unified time phase. This article describes a workflow executed with Mat lab simulation and practical measurements for single-phase power transformer, no-load, short-circuit test and load test are achieved in this work. The test procedures are implemented on areal transformer (terco-type) which has a specification (1 KVA, 220/110 V, 50 Hz). Finally, the simulation results are appeared a proximately seminar from the practical results. The results indicated that the the technique and manner which presented in the current study can be depended as a miniproject in electrical technology mater for undergraduate studies.
... Simulation models for utility network [247][248][249], transformers [250], CTs [251], electric vehicle fast and wireless chargers [252,253], televisions [254], low power electronic loads [255,256], high intensity discharge lamps [257], compact fluorescent lamps (CFL) with electronic or magnetic blasts [258][259][260][261], fluorescent tubes [262,263] and LED driver circuits [264][265][266] have been reported in literature. Resistance and DC link capacitance of a generic CFL model is given by [146]. ...
... Several types of current transformer models describing different feature have been reported in literature [250,251]. ...
... It is exigent task to develop a mathematical model for a nonlinear load to create an equivalent circuit for simulation analysis in Matlab Simulink. Simulation models for distribution systems, transformers, high current electric vehicle chargers, switch mode power supplies, rectifiers and lighting lamps have been extensively studied and reported in literature [189,248,250]. It is possible to generate power quality disturbances and harmonics to evaluate performance of proposed protection and control schemes inside Matlab/simulink [234]. ...
Power quality problems are manifested in voltage, current or frequency deviations causing malfunction of sensitive equipment. Integration of inverter connected PV and wind power plants, and rampant rise in nonlinear loads have led to harmonic problem in power system. Nonlinear loads and switched devices energized by sinusoidal sources or linear loads and switched devices with non-sinusoidal sources, produce harmonics in distribution system. Academic harmonic analysis study consists of modeling nonlinear loads to develop Norton and Thevenin equivalent circuits of devices for integration into harmonic analysis software. Experimental researchers often use harmonic analyzers to measure the harmonics in real systems to evaluate suitable mitigation alternatives. The distortive power losses force utilities to increase apparent power to maintain reliable and uniform power supply. Harmonic analyzers use data acquisition hardware and inbuilt software algorithms to perform onsite measurements. Harmonic analyzers help find true power factor, total harmonic distortions, reactive and distortive power losses. Use of shunt capacitance at unity power factor worsens the situation instead of supplying distortive power compensation. Active power factor correction techniques, using smart algorithm to cancel the distortive power, have been reviewed for further research. Nonlinear physics of harmonic phenomenon is described to explore its applications. Harmonic mitigation technologies have been compared, current state of the art technology reviewed and demonstrated by designing a harmonic filter. Measurement of harmonics, waveform distortions, and true power factor (TPF) of single and three phase electronic loads is carried out to test their compliance to harmonic standard limits. Energy conservation concept requires reduction of harmonics in distribution networks. This study found 60±10% reduction in power factor and more than 2% increase in line losses due to widespread use of nonlinear loads. Utility apparent power demand increases due to consumers’ inadvertent violation of IEC Standard 61000-3-2 and IEEE Standard 519–1992.
... Equally sized transformers equate to identical transformer core sizes and easy manufacturing even with different turns ratios. The transformer is not rated as active but features apparent power, which is the multiplication of RMS current and RMS voltage [27], [28] because iron losses depend on the voltage applied and copper losses depend on the current that flows through the winding. Given that six secondary windings of the transformers are connected in series, they have the same output RMS currents, which are assumed to be sinusoidal. ...
This study applies the selective harmonic elimination (SHE) technique to design and operate a regulated AC/DC/AC power supply suitable for maritime military applications and underground trains. The input is a single 50/60 Hz AC voltage, and the output is a 400 Hz regulated voltage. The switching angles for a multi-level inverter and transformer turns ratio are determined to operate with special connected transformers with equal power ratings and produce an almost sinusoidal current. As a result of its capability of directly controlling harmonics, the SHE technique is applicable to apparatus with congenital immunity to specific harmonics, such as series-connected transformers, which are specially designed to equally share the total load power. In the present work, a single-phase 50/60 Hz input source is rectified via a semi-controlled bridge rectifier to control DC voltage levels and thereby regulate the output load voltage at a constant level. The DC-rectified voltage then supplies six single-phase quazi-square H-bridge inverters, each of which supplies the primary of a single-phase transformer. The secondaries of the six transformers are connected in series. Through off-line calculation, the switching angles of the six inverters and the turns ratios of the six transformers are designed to ensure equal power distribution for the transformers. The SHE technique is also employed to eliminate the higher-order harmonics of the output voltage. A digital implementation is carried out to determine the switching angles. Theoretical results are demonstrated, and a scaled-down experimental 600 VA prototype is built to verify the validity of the proposed system.
... An electric power distribution system is the final stage in the delivery of electric power; it carries electricity from the transmission system to individual consumers. It transfers electrical energy from one side to another without change in frequency [1]. Increasing loads especially nonlinear on a transformer causes various effects decreasing the efficiency [2]. ...
Transformers are widely used as a static machine in power distribution system. Distribution network connects the transmission and lower the voltage to 2KV to 35KV medium range. Primary distribution lines carry this voltage range to distribution transformers. In this paper we have modeled transformer to perform simulation based analysis in Simulink for three windings linear transformer using various parameters. Results show that the higher the flux linkage the better the current induced on the secondary winding loads.
... Transformers are widely used as a static machine in power distribution system. It transfers electrical energywithout change in frequency from one side to another [1]. Increasing loads especiallynon-linear on a transformer causes various effects decreasing the efficiency [2]. ...
We present in this paper a Matlab based simulation model to compute current-loading parameters required to demonstrate the performance of a single-phase transformer. The method is simple and efficient using the indirect loading technique by performing short and open circuit tests, determined current, voltages and power dissipation. By this we can obtain the efficiency and voltage regulation of any single phase transformer. Our system provides a user friendly graphical user interface to observe the effect of loading input parameter variations. With this model we can accurately analyze the variations of a single phase transformer providing the input specifications. A 230V/200V single phase transformer is simulated and the obtained result graphs are discussed.
Transformer is a static electrical device which consists of two or more stationary circuit interlinked by a common magnetic circuit for the purpose of transferring electrical energy between them. It can raise or lower the voltage with a corresponding decrease or increase in current. Continuous supply can be defined as the supply where the current and the inductive energy storage never reaches zero. The various types of continuous supply are like:-Saw tooth, square, sinusoidal, triangular wave etc. Discontinuous supply can be defined as the supply when the current and inductive energy storage may reach or cross zero. The various types of discontinuous supply are like: impulse, discrete etc. Here the three phase transformer with the different types of supplies was analyzed by which we will be able to use the same transformer for various purposes. By this, various parameters like Efficiency and Voltage Regulation with different inputs for the same transformer can be simulated. MATLAB/Simulink is used for simulation.
