scholarly journals Single-Phase Active Power Harmonics Filter by Op-Amp Circuits and Power Electronics Devices

2018 ◽  
Vol 10 (12) ◽  
pp. 4406 ◽  
Author(s):  
Emad Samadaei ◽  
Mina Iranian ◽  
Mohammad Rezanejad ◽  
Radu Godina ◽  
Edris Pouresmaeil
Keyword(s):  
Power Electronics ◽  
Single Phase ◽  
Low Voltage ◽  
Low Cost ◽  
Reference Signal ◽  
Active Power ◽  
Op Amp ◽  
Sinusoidal Waveform ◽  
Control Circuits ◽  
Power Harmonics

This paper introduces a new structure for single-phase Active Power Harmonics Filter (APHF) with the simple and low-cost controller to eliminate harmonics and its side effects on low voltage grid. The proposed APHF includes an accurate harmonic detector circuit, amplifier circuit to trap tiny harmonics, switching driver circuit for precise synchronization, and inverter to create injection current waveform, which is extracted from reference signal. The control circuits are based on electrostatic devices consist of Op-Amp circuits. Fast dynamic, simplicity, low cost, and small size are the main features of Op-Amp circuits that are used in the proposed topology. The aim is removing the all grid harmonic orders in which the proposed APF injects an appropriate current into the grid in parallel way. The proposed control system is smart enough to compensate all range of current harmonics. A prototype is implemented in the power electronics laboratory and it is installed as parallel on a distorted grid by the non-linear load (15 APeak-Peak) to verify the compensating of harmonics. The harmonics are compensated from THD% = 24.48 to THD% = 2.86 and the non-sinusoidal waveform is renovated to sinusoidal waveform by the proposed APHF. The experimental results show a good accurate and high-quality performance.

Microgrid Model on Homer Software

2021 ◽  
Vol 9 (VI) ◽  
pp. 757-760
Author(s):  
Mohd Ahamad
Keyword(s):  
Power Generation ◽  
Power Electronics ◽  
Life Cycle Cost ◽  
Low Voltage ◽  
High Reliability ◽  
Low Cost ◽  
Local Area ◽  
New Paradigm ◽  
Power Sources ◽  
Wide Range

A new concept in power generation is a microgrid. The Microgrid concept assumes a cluster of loads and microsources operating as a single controllable system that provides power to its local area. This concept provides a new paradigm for defining the operation of distributed generation. The microsources of special interest for MGs are small (<100-kW) units with power electronic interfaces. These sources are placed at customers sites. They are low cost, low voltage and have a high reliability with few emissions. Power electronics provide the control and flexibility required by the MG concept. A properly designed power electronics and controllers insure that the MG can meet the needs of its customers as well as the utilities. The goal of this project is to build a complete model of Microgrid including the power sources, their power electronics, and a load and mains model in THE HOMER. The HOMER Micropower Optimization Model is a computer model developed by the U.S. National Renewable Energy Laboratory (NREL) to assist in the design of micropower systems and to facilitate the comparison of power generation technologies across a wide range of applications. HOMER models a power system’s physical behavior and its life-cycle cost, which is the total cost of installing and operating the system over its life span. HOMER allows the modeler to compare many different design options based on their technical and economic merits. It also assists in understanding and quantifying the effects of uncertainty or changes in the inputs.

A Novel Algorithm for a Single-Phase Active Power Filter

2015 ◽  
Vol 764-765 ◽  
pp. 448-452
Author(s):  
Maoh Chin Jiang ◽  
Bing Jyun Shih
Keyword(s):  
Single Phase ◽  
Active Power Filter ◽  
Active Power ◽  
Nonlinear Loads ◽  
Load Current ◽  
Power Filter ◽  
Sinusoidal Waveform ◽  
Voltage Signal ◽  
Main Voltage ◽  
Novel Algorithm

A novel algorithm for a single-phase active power filter (APF) is proposed in this paper. The proposed algorithm avoids the use of main voltage signal in the calculation of reference compensation current. Therefore, the mains current after compensation is still a pure sinusoidal waveform even when the mains voltage is distorted. A novel circuit for detecting the amplitude of the real part of the fundamental load current is not more than 1/4 cycle. Its transient response is superior to the other conventional techniques. In addition, the proposed algorithm can compensate for the power factor and suppress the harmonics of nonlinear loads. Finally, some experimental results are presented for verification.

Evaluation of Two-Phase Cold Plate for Cooling Electric Vehicle Power Electronics

2011 ◽  
Author(s):  
Peng Wang ◽  
Patrick McCluskey ◽  
Avram Bar-Cohen
Keyword(s):  
Power Electronics ◽  
Electric Vehicle ◽  
Thermal Management ◽  
High Performance ◽  
Single Phase ◽  
Low Cost ◽  
Critical Issue ◽  
System Level ◽  
Cold Plate ◽  
Two Phase

Rapid increases in the power ratings and continued miniaturization of semiconductor devices have pushed the heat flux of power electronics well beyond the range of conventional thermal management techniques, and thus maintaining the IGBT temperature below a specified limit has become a critical issue for thermal management of electric vehicle power electronics. Although two-phase cold plates have been identified as a very promising high flux cooling solution, they have received little attention for cooling of power electronics. In this work, a first-order analytical model and a system-level thermal simulation are used to compare single-phase and two-phase cold plate cooling for Toyota Prius motor inverter, consisting of 12 pairs of IGBT’s and diodes. Our results demonstrate that with the same cold plate geometry, R134a two-phase cooling can substantially reduce the maximum IGBT temperature, operate all the IGBT’s at very uniform temperatures, and lower the pumping power and flow rate in comparison to single-phase cold plate cooling. These results suggest that two-phase cold plate can be developed as a low-cost, small-volume, and high-performance cooling solution to improve system reliability and conversion efficiency for electric vehicle power electronics.

Embedded System Implementation of Shunt Active Power Filter with Direct Compensation Component Generation Using Linear Operational Amplifiers

2020 ◽  
Vol 29 (10) ◽  
pp. 2050166
Author(s):  
S. Kumaresan ◽  
H. Habeebullah Sait
Keyword(s):  
Embedded System ◽  
Pulse Width Modulation ◽  
Low Cost ◽  
Reference Signal ◽  
Active Power Filter ◽  
Active Power ◽  
Operational Amplifiers ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
The Embedded System

In this paper, the principles, the design, the methodology of low cost implementation and the results of implementation of a shunt active power filter (SAPF) in the embedded system environment are presented. The system for which the SAPF is considered has a combination of linear reactive load and a three-phase-fed diode bridge rectifier that drives an RL load. The generation of the compensating signal or the reference signal is based upon the direct calculations implemented using the linear operational amplifiers. Further, the generation of the pulse width modulation (PWM) pulses is much similar to the conventional sinusoidal PWM but implemented in the embedded system platform. In this work, the built-in PWM and ADC sections of the microcontroller PIC 16F877A have been utilized for generating the PWM pulses without the requirement of an explicit carrier signal. The proposed method has been validated in MATLAB SIMULINK environment and also by an experimental prototype.

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