Reactive-power definitions and power-factor improvement in nonlinear systems

1973 ◽  
Vol 120 (6) ◽  
pp. 704 ◽  
Author(s):  
D. Sharon
Keyword(s):  
Nonlinear Systems ◽  
Power Factor ◽  
Reactive Power ◽  
Power Factor Improvement

scholarly journals Power factor improvement for a three-phase system using reactive power compensation

2021 ◽  
Vol 24 (2) ◽  
pp. 715
Author(s):  
Majid Ali ◽  
Faizan Rashid ◽  
Saim Rasheed
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Reactive Power Compensation ◽  
Phase System ◽  
Automatic Correction ◽  
Binary Coding ◽  
Three Phase ◽  
Electrical Loads ◽  
Power Factor Improvement

For all industrial and distribution sites, the lagging power factor of electrical loads is a common problem. In the early days, it was corrected manually by adding the capacitor banks of certain values in parallel. Automatic power factor correction (APFC) using a capacitor bank helps to make a power factor that is close to unity. It consists of a microcontroller that processes the value of the power factor to enable the system and monitor the power factor if it falls below (0.77) from the specified level. This paper presents the automatic correction of the power factor by adding the capacitors banks automatically of the desired value in a three-phase system in the form of binary coding (0-7). The main purpose of this system is to maintain the power factor as close as to unity, for the experimental case, it is set to (0.93) which helps to decreases the losses and ultimately increase the efficiency of the system.

scholarly journals The Simulation of Compensator based on Vector Control Method For Power Factor Improvement using MATLAB

2011 ◽  
pp. 134-139
Author(s):  
Sangam Singh
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Control Method ◽  
Electronic System ◽  
Power Electronic ◽  
System A ◽  
Static Var Compensators ◽  
Non Linear Systems ◽  
Power Factor Improvement ◽  
System Operating

Power electronics systems are non-linear systems, which consume more reactive power and also the loads they feed are mostly inductive loads which leads to a poor power factor. Various compensation techniques are available to bring the power factor nearer to unity. In this paper, a novel compensator is proposed, where in-phase and quadrature components of the supply current are vector-controlled. Implementation of this compensator in a power electronic system operating with a very poor power factor (and hence high THD), shows that the system then draws a leading current. A conventional power electronic system, A conventional power electronic system with one of the traditional static VAR compensators and the conventional power electronic system incorporated with the proposed compensator are simulated and the simulation results are obtained. It is shown that the proposed method offers only 0.7% THD, which also implies that the power factor is improved.

scholarly journals Power Factor Improvement Using Automatic Power Factor Compensation (APFC) Device for Medical Industries in Malaysia

2018 ◽  
Vol 150 ◽  
pp. 01004
Author(s):  
Maryam Nabihah Zaidi ◽  
Adlan Ali
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Cost Effective ◽  
Inductive Load ◽  
Increase Energy Efficiency ◽  
Programmable Device ◽  
Compensation Device ◽  
The Cost ◽  
Power Factor Improvement ◽  
Energy Network

This paper present the project designed to correcting power factor for medical industries in Malaysia automatically. Which with hope to make the cost and energy usage efficient, because the energy source are depleting due to increase in population. Power factor is the ratio of real power and apparent power. This definition is mathematically represented as kW/kVA where kW is active power and kVA is apparent power (active + reactive). Reactive power is the non-working power generated by the magnetic and inductive load to generate magnetic flux. The increase in reactive power increase the apparent power so the power factor will decrease. Low pF will cause the industry to meet high demand thus making it less efficient. The main aim of this project is to increasing the current power factor of medical industries from 0.85 to 0.90. Power factor compensation contribute to reduction in current-dependent losses and increase energy efficiency while expanding the reliability of planning for future energy network. As technology develops, the gradual cost and efficiency penalty should reduce. Therefore, automatic power factor compensation device should become cost-effective and smaller device over time. That is the reason this project is using programmable device as it is a miniature architecture device.

scholarly journals Rancang Bangun Kapasitor Bank Otomatis Berbasis Mikrokontroler ATmega 328P Untuk Perbaikan Faktor Daya

2018 ◽  
Vol 5 (1) ◽  
pp. 157
Author(s):  
Putu Angga Juliantara ◽  
I Wayan Arta Wijaya ◽  
Cok Gede Indra Partha
Keyword(s):  
Power Factor ◽  
Reactive Power ◽  
Voltage Sensor ◽  
Current Sensor ◽  
Inductive Load ◽  
Load Current ◽  
Non Invasive ◽  
Power Factor Improvement ◽  
Lcd Displays ◽  
Minimum System

Inductive load with low power factor has led to the greater load current so that it is required a power factor improvement. Improvement of power factor in inductive load can be carried out by installing capacitor according to required proportion. Installation of capacitors can be used in parallel or series to electric source.The method of making design is divided into two parts, namely, the first is the designing of hardware and the second is the designing of the software. The designing of hardware consists of designing the power supply circuit, driver relay circuit, LCD circuit, minimum system circuit of ATmega 328P, capacitor bank circuit, current sensor circuit and voltage sensor circuit. The sensors used in this study were a non-invasive type SCT013-010 current sensor and a voltage sensor of a 500 mA type zero transformer. The design of software was in the form of work program tools that use the application of Arduino IDE. LCD displays the readout values of voltage, load current, active power, apparent power, reactive power and power factor. The ATmega 328P microcontroller processes data and determines the working relay so that the purpose of power factor value by cos phi ? 0.85 is achieved. The results achieved in this research is the design of automatic bank capacitor based on microcontroller of ATmega 328P can improve power factor by conducting injection capacitor to raise the power factor value according to PLN standard by cos phi ? 0.85 by connecting capacitor to the source of PLN paralleled by a single phase inductive load.

Boost Ratio and Power Factor Improvement in Cockcroft-Walton Circuit with Diode Junction Capacitor

2016 ◽  
Vol 136 (12) ◽  
pp. 991-996 ◽  
Author(s):  
Masataka Minami ◽  
Takeshi Ito ◽  
Shin-ichi Motegi ◽  
Masakazu Michihira
Keyword(s):  
Power Factor ◽  
Power Factor Improvement
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