Two methods for improved measurements of reactive power and reactive energy insensitive to frequency variations

1998 ◽  
Vol 47 (1) ◽  
pp. 215-218 ◽  
Author(s):  
B.V. Djokic ◽  
P. Bosnjakovic
Keyword(s):  
Reactive Power ◽  
Frequency Variations

Novel control structure of single-phase active power filter using recursive least squares estimator considering a distorted environment

2015 ◽  
Vol 39 (6) ◽  
pp. 820-831 ◽  
Author(s):  
M Fallah ◽  
H Madadi ◽  
M Tavakoli Bina ◽  
A Ajami
Keyword(s):  
Power System ◽  
Least Squares ◽  
Single Phase ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Harmonic Component ◽  
Phase Detector ◽  
Recursive Least Squares ◽  
Harmonic Compensation ◽  
Frequency Variations

In this paper, a new reactive power and harmonic compensation procedure based on the variable forgetting factor-recursive least squares (VFF-RLS) estimator and new phase-locked loop is proposed. For this purpose, the fundamental harmonic component of load current is estimated with VFF-RLS. Independence on order and amplitude of harmonics, fast dynamic and high accuracy are the remarkable features of the designed estimator. As in the case of load changes, the sag/swell and phase jump in grid voltage, optimal compensation is performed in less than half a cycle with a low total harmonic distortion value. In addition, to compensate for an infected power system by varied frequency, a second-order general integrator-frequency-locked loop (SOGI-FLL) control system based on wavelet transform (WT) has been proposed. This phase detector can track the reference phase of a grid in the best manner in the presence of frequency variations. The effectiveness of the proposed method in a single-phase power system has been validated using both simulation and experimental results.

REACTIVE POWER COMPENSATION MINIMUM LOAD TRANSFORMERS WITH A SECONDARY VOLTAGE 0 4 KV

2018 ◽  
Vol 28 (104) ◽  
pp. 154-160
Author(s):  
I. Doroshenko, ◽  
◽  
T. Druchyna, ◽  
Yu. G. Sarahman ◽  
Keyword(s):  
Reactive Power ◽  
Reactive Power Compensation ◽  
Secondary Voltage

FLOW CONTROL ACTIVE AND REACTIVE POWER IN ELECTRIC NETWORKS

2016 ◽  
Vol 2016 (5) ◽  
pp. 61-63
Author(s):  
F.P. Govorov ◽  
◽  
V.F. Govorov ◽  
Keyword(s):  
Flow Control ◽  
Reactive Power ◽  
Electric Networks ◽  
Active And Reactive Power
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