Modeling and Simulation of Power Electronic Distribution Transformer Based on a Three Level Converter

2015 ◽  
Vol 785 ◽  
pp. 151-155 ◽  
Author(s):  
K.Y. Ahmed ◽  
N.Z. Yahaya ◽  
V.S. Asirvadam ◽  
Oladimeji Ibrahim
Keyword(s):  
Reactive Power ◽  
Minimum Size ◽  
Power Electronic ◽  
Distribution Transformer ◽  
Output Stage ◽  
Electronic Distribution ◽  
Three Phase ◽  
New Type ◽  
Power Electronics Converter ◽  
Level Converter

In this paper, a new type of power electronic distribution transformer (PET) has been introduced based on the power electronics converter on the primary and secondary sides of the transformer. This PET has three stages and the input stage has a three-level, three-phase rectifier. The middle stage has two three-level single-phase converters and a high-frequency transformer; and, the output stage is a three-phase, two-level inverter. This power electronic distribution transformer provides many advantages, such as power factor improvement, reactive power compensation, eliminating harmonics, and controlling and protecting itself (PET) with minimum size, compared to the traditional transformer. The MATLAB/Simulink was used to analyze and validate the power electronic distribution transformer.

The Research of PWM Controlling Capacitance SVC Based on RB-IGBT

2010 ◽  
Vol 44-47 ◽  
pp. 3970-3975
Author(s):  
Ke Wang ◽  
Bin Chen ◽  
Wen Han Chen ◽  
Hua Xu ◽  
Jia Xin Yuan
Keyword(s):  
Reactive Power ◽  
Electronic Devices ◽  
Reactive Power Compensation ◽  
Power Electronic ◽  
Practical Application ◽  
Advantages And Disadvantages ◽  
Compensation Principle ◽  
New Type

At first, this paper compared the present some advantages and disadvantages of reactive power compensation devices, and analysis the disadvantages of these devices in practical application deficiencies, then put forward a new kind of reactive power compensation principle. With the development of power electronic devices, this paper put forward a new type of reactive power compensation which based on RB-IGBT of SVC mode, synthesize the advantages of domestic reactive power compensation devices at present, and the prospect of application is very good.

A New Method of Three-Phase Unbalanced Load Harmonic Current Detection

2014 ◽  
Vol 1070-1072 ◽  
pp. 726-730
Author(s):  
Hong Zheng ◽  
Yun Zhang ◽  
Jun Huang ◽  
Zhe Yu Wang
Keyword(s):  
Reactive Power ◽  
Detection Algorithm ◽  
Phase System ◽  
Instantaneous Reactive Power Theory ◽  
Three Phase ◽  
Unbalanced Load ◽  
Zero Sequence ◽  
New Type ◽  
Leakage Error ◽  
Improved Algorithm

The extensive usage of power electronic equipments makes harmonic problem increasingly serious. In unbalanced three-phase system, traditional p-q, d-q method ignores the zero sequence currents, resulting in zero sequence harmonic leakage error. This article is based on the basic principle of instantaneous reactive power theory, it proposes a new type of harmonic detection algorithm, this algorithm does not need phase-locked loop nor do a matrix transformation, and can effectively avoid the zero order harmonic leakage error caused by coordinate transformation.In the end, using Matlab/Simulink environment to build models of traditional algorithm and improved algorithm .Through comparison, the simulation result shows that the improved algorithm is more accurate and more effective than the traditional one.

Simulation Study of Harmonics and Reactive Power in Three-Phase Full-Bridge Controlled Rectifier Circuit with Resistance-Inductance Load

2011 ◽  
Vol 383-390 ◽  
pp. 621-626
Author(s):  
Yu Fei Wang ◽  
Chang Hui Yang ◽  
Hua Xue ◽  
Xiu Yang
Keyword(s):  
Power Factor ◽  
Simulation Study ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Electronic Devices ◽  
Power Electronic ◽  
Specific Design ◽  
Matlab Simulink ◽  
Rectifier Circuit ◽  
Three Phase

In order to evaluate the harm and impact of power electronic devices on the grid and provide numerical basis for specific design of the corresponding compensated devices, the harmonics and reactive power of three-phase full-bridge controlled rectifier circuit with resistance-inductance load are studied in this paper. Firstly, the harmonics and power factor of the ac side current are analyzed theoretically; the harmonics contents and power factor are calculated. Secondly, the model of three-phase full-bridge controlled rectifier circuit is built in Matlab/Simulink, and the simulation analysis of the ac side power factor and harmonics is achieved, the simulated values are similar to the theoretical values. The results show that the complex calculations of harmonics and power factor can be completed simply and intuitively using simulation study, the simulation study is efficient and accurate.

scholarly journals Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids

2021 ◽  
Vol 6 (1) ◽  
pp. 1-11
Author(s):  
Kwaśny Łukasz ◽  
Dariusz Zieliński
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Storage Device ◽  
Programming Environment ◽  
Power Electronic ◽  
Active And Reactive Power ◽  
Model And Simulation ◽  
Three Phase ◽  
Dc Line ◽  
Phase Converter

Abstract The paper presents the project of the power electronic AC/DC converter operating under a multiresonant control algorithm for prosumer applications. This design allows independent control of active and reactive power for any or each phase. Both the converter and its algorithm are based on a three-phase converter of four-wire topology (AC/DC 3p-4w) with a DC bus, which couple the converter to a renewable energy source and energy storage. Further, model and simulation tests were carried out in the Matlab-SIMULINK programming environment. The results obtained indicate that operation with deep unbalances and powers of opposite signs in individual phases results in current variations (oscillations) in the DC line, which is a significant limitation, and it can be concluded that the level of asymmetry should be limited to the level acceptable to the energy storage device.

scholarly journals Development of Power Electronic Distribution Transformer Based on Adaptive PI Controller

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 44970-44980 ◽  
Author(s):  
Khalid Yahia Ahmed ◽  
Nor Zaihar Bin Yahaya ◽  
Vijanth Sagayan Asirvadam ◽  
Nordin Saad ◽  
Ramani Kannan ◽  
...  
Keyword(s):  
Pi Controller ◽  
Power Electronic ◽  
Distribution Transformer ◽  
Electronic Distribution

scholarly journals Control Strategy for Electric Vehicle Charging Station Power Converters with Active Functions

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3971 ◽  
Author(s):  
Fermín Barrero-González ◽  
María Isabel Milanés-Montero ◽  
Eva González-Romera ◽  
Enrique Romero-Cadaval ◽  
Carlos Roncero-Clemente
Keyword(s):  
Power Quality ◽  
Control Strategy ◽  
Reactive Power ◽  
Power Electronic ◽  
Charging Station ◽  
Electric Vehicle Charging ◽  
Battery Chargers ◽  
Three Phase ◽  
Facility Level

Based on the assumption that vehicles served by petrol stations will be replaced by Electric Vehicles (EV) in the future, EV public charging station facilities, with off-board fast chargers, will be progressively built. The power demand of these installations is expected to cause great impact on the grid, not only in terms of peak power demanded but also in terms of power quality, because most battery chargers behave as non-linear loads. This paper presents the proposal of a novel comprehensive global control strategy for the power electronic converters associated with bidirectional three-phase EV off-board fast chargers. The Charging Station facility Energy Management System (CS-EMS) sends to each individual fast charger the active and reactive power setpoints. Besides, in case the charger has available capacity, it is assigned to compensate a fraction of the harmonic current demanded by other loads at the charging facility. The proposed approach works well under distorted and unbalanced grid voltages. Its implementation results in improvement in the power quality of each fast charger, which contributes to improvement in the power quality at the charging station facility level, which can even provide ancillary services to the distribution network. Simulation tests are conducted, using a 100 kW power electronic converter model, under different load and grid conditions, to validate the effectiveness and the applicability of the proposed control strategy.

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