A new approach to the reactive current detection in three-phase systems under nonsinusoidal voltage condition

2011 ◽  
Author(s):  
Xiaobin Zhang ◽  
Yanru Zhong
Keyword(s):  
New Approach ◽  
Three Phase ◽  
Reactive Current ◽  
Phase Systems ◽  
Current Detection ◽  
Nonsinusoidal Voltage

A New Method of Harmonic Current Detection and Control Strategy of Compensating Current

2012 ◽  
Vol 588-589 ◽  
pp. 986-989
Author(s):  
Xiang Cheng ◽  
Tie Lin Zheng ◽  
Gui Hong Feng
Keyword(s):  
Detection Method ◽  
Current Control ◽  
Phase Voltage ◽  
Power Filter ◽  
Three Phase ◽  
Reactive Current ◽  
Asymmetric Power ◽  
And Control ◽  
Current Detection ◽  
Control Accuracy

This paper puts forward and realizes a detection method, which can extract harmonic and reactive current accurately when the network exists nonideal and asymmetric power grid voltages. From the view of vector analysis, through the d-q coordinates[1,2] project transformation of the three-phase voltage and current vectors, the harmonic and reactive current extraction is realized. The compensation current adopts forecast current control, obtaining a better compensation characteristic and control accuracy .From the experimental results of 5 kVA active power filter（APF）and 150 kVA mixing filters, the feasibility and the correctness of the proposed method are proved.

scholarly journals Geometric Algebra Framework Applied to Symmetrical Balanced Three-Phase Systems for Sinusoidal and Non-Sinusoidal Voltage Supply

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1259
Author(s):  
Francisco G. Montoya ◽  
Raúl Baños ◽  
Alfredo Alcayde ◽  
Francisco Manuel Arrabal-Campos ◽  
Javier Roldán Roldán Pérez
Keyword(s):  
Geometric Algebra ◽  
Dimensional Euclidean Space ◽  
Active Components ◽  
Electrical Circuits ◽  
Current Harmonics ◽  
Operation Conditions ◽  
Multiple Phase ◽  
Three Phase ◽  
Phase Systems ◽  
Definition Of

This paper presents a new framework based on geometric algebra (GA) to solve and analyse three-phase balanced electrical circuits under sinusoidal and non-sinusoidal conditions. The proposed approach is an exploratory application of the geometric algebra power theory (GAPoT) to multiple-phase systems. A definition of geometric apparent power for three-phase systems, that complies with the energy conservation principle, is also introduced. Power calculations are performed in a multi-dimensional Euclidean space where cross effects between voltage and current harmonics are taken into consideration. By using the proposed framework, the current can be easily geometrically decomposed into active- and non-active components for current compensation purposes. The paper includes detailed examples in which electrical circuits are solved and the results are analysed. This work is a first step towards a more advanced polyphase proposal that can be applied to systems under real operation conditions, where unbalance and asymmetry is considered.

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