An improved three-phase reactive power measurement algorithm using walsh functions transform

2013 ◽  
Vol 9 (1) ◽  
pp. 7-14 ◽  
Author(s):  
Garba Aliyu ◽  
Saifulnizam Bin Abd. Khalid ◽  
Mohd Wazir Mustafa ◽  
Hussein Shareef
Keyword(s):  
Reactive Power ◽  
Power Measurement ◽  
Walsh Functions ◽  
Three Phase ◽  
Measurement Algorithm

A New Improved Walsh Function Algorithm for Active and Reactive Power Measurement

2014 ◽  
Vol 67 (3) ◽  
Author(s):  
Garba Aliyu ◽  
Saifulnizam Abd. Khalid ◽  
Jafaru Usman ◽  
Ahmad Fuad A. Aziz ◽  
Hussein Shareef
Keyword(s):  
Reactive Power ◽  
Walsh Function ◽  
Power Measurement ◽  
Nonlinear Load ◽  
Active And Reactive Power ◽  
Linear Load ◽  
Alternative Approach ◽  
Three Phase ◽  
Linear And Nonlinear ◽  
High Level

This paper present improved Walsh function (IWF) algorithm as an alternative approach for active and reactive power measurement in linear and nonlinear, balanced and unbalanced sinusoidal three phase load system. It takes advantage of Walsh function unified approach and its intrinsic high level accuracy as a result of coefficient characteristics and energy behaviour representation. The developed algorithm was modeled on the Matlab Simulink software; different types of load, linear and nonlinear were also modeled based on practical voltage and current waveforms and tested with the proposed improved Walsh algorithm. The IEEE standard 1459-2000 which is based on fast Fourier transform FFT approach was used as benchmark for the linear load system while a laboratory experiment using Fluke 435 power quality analyzer PQA which complies with IEC/EN61010-1-2001standards was used to validate the improved algorithm for nonlinear load measurement. The results showed that the algorithm has the potential to effectively measure three phase power components under different load conditions.

Reactive Power Measurement in Three-Phase Unbalanced Circuits Using Two Wattmeters

2010 ◽  
Vol 47 (2) ◽  
pp. 227-228
Author(s):  
V. V. Bapeswara Rao
Keyword(s):  
Reactive Power ◽  
Power Measurement ◽  
Three Phase

A procedure to measure reactive power in three-phase unbalanced circuits using two wattmeters is presented. The total reactive power is obtained as an algebraic sum of two wattmeter readings. The voltage coil circuit of each wattmeter is suitably modified.

ELECTRIC POWER DEFINITION IN THE WAVELET DOMAIN

2005 ◽  
Vol 03 (04) ◽  
pp. 573-585 ◽  
Author(s):  
EDUARDO ANTONIO CANO PLATA ◽  
HERNÁN EMILIO TACCA
Keyword(s):  
Reactive Power ◽  
Power Measurement ◽  
Quality Analysis ◽  
Wavelet Domain ◽  
Active And Reactive Power ◽  
Analysis Technique ◽  
Three Phase ◽  
Power Quality Analysis ◽  
Simple Phase ◽  
Definition Of

This paper discusses the definition of active and reactive power in wavelet domain. Different definitions for three-phase power may cause significant changes in the measurement equipment topology. The simple phase shift using the Akagi method between current and voltage for reactive power measurement is discussed. A new power quality analysis technique (pqAT) is proposed.

On the Electronic Three-Phase Active and Reactive Power Measurement

1978 ◽  
Vol 27 (4) ◽  
pp. 452-455 ◽  
Author(s):  
Petar N. Miljanic ◽  
Borislav Stojanovic ◽  
Vladimir Petrovic
Keyword(s):  
Reactive Power ◽  
Power Measurement ◽  
Active And Reactive Power ◽  
Three Phase

scholarly journals Attenuation of DC-Link Pulsation of a Four-Wire Inverter during Phase Unbalanced Current Operation

2021 ◽  
Vol 11 (3) ◽  
pp. 1322
Author(s):  
Dariusz Zieliński ◽  
Karol Fatyga
Keyword(s):  
Energy Storage ◽  
Control Algorithm ◽  
Reactive Power ◽  
Lithium Ion ◽  
Power Converter ◽  
Dual Active Bridge ◽  
Three Phase ◽  
Ion Storage ◽  
Energy Store ◽  
Phase Converter

This paper proposes a control algorithm for a hybrid power electronic AC/DC converter for prosumer applications operating under deep phase current asymmetry. The proposed system allows independent control of active and reactive power for each phase of the power converter without current pulsation on the DC link connected to an energy store. The system and its algorithm are based on a three-phase converter in four-wire topology (AC/DC 3p-4w) with two dual-active bridge (DC/DC) converters, interfaced with a supercapacitor and an energy storage. The control algorithm tests were carried out in a Hardware in the Loop environment. Obtained results indicate that operation with deep unbalances and powers of opposite signs in individual phases leads to current oscillations in the DC link. This phenomenon significantly limits energy storage utilization due to safety and durability reasons. The proposed algorithm significantly reduces the level of pulsation in the DC link which increases safety and reduces strain on lithium-ion storage technology, enabling their application in four-wire converter applications.

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