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In this paper, based on the analysis of the fundamental phase shift issue for conventional OCC-based VIENNA rectifier with variable f s / f l under unbalanced grid conditions, a compensation scheme has been proposed to eliminate the fundamental phase shift.
The proposed method can reduce the fundamental phase shift between the input current and corresponding phase voltage effectively, by dynamically modifying three-phase modulation signals with the complex vector grid currents feedback.
The reason of this phenomenon is that the proposed phase compensation method changes the fundamental frequency operating point of the studied system. Therefore, the power needs to be corrected to achieve precise control of the power. By employing the proposed method and strategy, the SSR can be damped and is robust to grid impedance fluctuations.
The calculations are best done in a spreadsheet, thereby determining an entire pre-calculated table. The tolerance of the CT phase shift must be known to determine the maximum and minimum phase shift. The phase shift step is chosen so that the error due to inexact compensation remains acceptable.
On the other hand, CT phase shift has almost no impact on linear calibration. The actual CT calibration starts by internally delaying the mains input current to emulate a non-UPF load. This is the main technique used in the whole calibration process. A small CT phase shift creates a relatively big error in this case.
CTs with a large phase shift can still be compensated and calibrated provided they exhibit a mean phase shift with an acceptable range of deviation. This kind of CT can be compensated first with an FIR designed for a mean phase shift h under UPF calibration.
An extra phase was added to external phase shift in this method for the compensation in ... constant phase shift compensation is not possible to apply. A PI controller …
In this paper, based on the analysis of the fundamental phase shift issue for conventional OCC-based VIENNA rectifier with variable f s / f l under unbalanced grid …
Objective of compensation is to achieve stable operation when negative feedback is applied around the op amp. Types of Compensation 1. Miller - Use of a capacitor feeding back around …
CLASSICAL MODEL: This is a simple method for calculating the leakage inductance since only a small number of dimensions are necessary related to the winding …
• the uncompensated phase shift at the gain crossover frequency must be more negative than the value needed to satisfy the phase margin specification (otherwise, no compensation is …
This study proposes a novel method to compensate phase shift angle of dual active bridge (DAB) converters by considering the parasitic capacitance of SiC metal-oxide-semiconductor...
4 Current-Transformer Phase-Shift Compensation and Calibration The actual CT calibration starts by internally delaying the mains input current to emulate a non-UPF load. This is the main …
CLASSICAL MODEL: This is a simple method for calculating the leakage inductance since only a small number of dimensions are necessary related to the winding …
This study proposes a novel method to compensate phase shift angle of dual active bridge (DAB) converters by considering the parasitic capacitance of SiC metal-oxide-semiconductor field …
Abstract: This study proposes a novel method to compensate phase shift angle of dual active bridge (DAB) converters by considering the parasitic capacitance of SiC metal …
A phase compensation method employed in phase-locked loop (PLL) is proposed to suppress SSR. Power correction is proposed which can achieve precise control of active …
nonlinearity of output voltage and phase currents ripples with 5th and 7th order ripples of fundamental frequency. Current ripple decreases motor control performance. This paper …
According to the identification results, the output voltage is controlled by phase shift control. Simulation and experiment show that the identification method in this paper can …
2.1 Compensation using series capacitors 4 2.2 Parallel compensation 4 2.3 Ballast Directive 2000/55/EC and compensation of lighting systems 5 2.4 Uniform compensation method 6 3 …
4 Current-Transformer Phase-Shift Compensation and Calibration The actual CT calibration starts by internally delaying the mains input current to emulate a non-UPF load. This is the main …
This paper presents an improved phase-shift control method for a switched-capacitor-based resonant converter. Compared with the traditional phase-shift control, the proposed improved …
This study proposes a novel method to compensate phase shift angle of dual active bridge (DAB) converters by considering the parasitic capacitance of SiC metal-oxide …
DOI: 10.1109/AMC.2019.8371093 Corpus ID: 46935541; Dead time compensation for three-level flying capacitor inverter with phase shift PWM @article{Takahashi2018DeadTC, title={Dead …
The novel compensation method for dead time improves the performance of any general optimized techniques for DAB with extended phase shift. Firstly, the link current values …
the capacitor or transformer for various testing conditions. Hou''s partial cancellation concept was brought up in [10] as an extension of Mu''s method. The fundamental concept of this method is …
In order to achieve energy interaction between the power supply and battery energy storage devices, the bilateral LCLC resonant network of the EC-BWPT system is …