Control Analysis of Stationary Reference Frame based Current Controller for a Grid tied Inverter based Distributed Generation

2020 ◽  
Author(s):  
Kumari Namrata ◽  
Akshit Samadhiya ◽  
Akash Satla ◽  
Pavan Kumar Guntupally ◽  
Sai Nishanth Yelamarthy
Keyword(s):  
Reference Frame ◽  
Distributed Generation ◽  
Control Analysis ◽  
Current Controller ◽  
Stationary Reference Frame

Frequency-Adaptive Stationary-Reference-Frame Grid Voltage Sequence Detector for Distributed Generation Systems

2011 ◽  
Vol 58 (9) ◽  
pp. 4275-4287 ◽  
Author(s):  
E. Robles ◽  
J. Pou ◽  
S. Ceballos ◽  
J. Zaragoza ◽  
J. L. Martin ◽  
...  
Keyword(s):  
Reference Frame ◽  
Distributed Generation ◽  
Grid Voltage ◽  
Stationary Reference Frame

scholarly journals Control Strategy Based on Arm-Level Control for Output and Circulating Current of MMC in Stationary Reference Frame

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4160
Author(s):  
Waqar Uddin ◽  
Tiago D. C. Busarello ◽  
Kamran Zeb ◽  
Muhammad Adil Khan ◽  
Anil Kumar Yedluri ◽  
...  
Keyword(s):  
Reference Frame ◽  
Control Method ◽  
Second Harmonic ◽  
Harmonic Component ◽  
Effective Control ◽  
Level Control ◽  
Circulating Current ◽  
Stationary Reference Frame ◽  
Pr Controller ◽  
Dc Component

This paper proposed a control method for output and circulating currents of modular multilevel converter (MMC). The output and circulating current are controlled with the help of arm currents, which contain DC, fundamental frequency, and double frequency components. The arm current is transformed into a stationary reference frame (SRF) to isolate the DC and AC components. The AC component is controlled with a conventional proportional resonant (PR) controller, while the DC component is controlled by a proportional controller. The effective control of the upper arm and lower arm ultimately controls the output current so that it delivers the required power to the grid and circulating current in such a way that the second harmonic component is completely vanished leaving behind only the DC component. Comparative results of leg-level control based on PR controller are included in the paper to show the effectiveness of the proposed control scheme. A three-phase, five-level MMC is developed in MATLAB/Simulink to verify the effectiveness of the proposed control method.

scholarly journals Dual Sequence Controller with Delayed Signal Cancellation in the Rotating Reference Frame

2021 ◽  
Author(s):  
Daniel Mota ◽  
Erick Alves ◽  
Elisabetta Tedeschi
Keyword(s):  
Reference Frame ◽  
Reference Frames ◽  
Formal Proof ◽  
Voltage Source ◽  
Phase Measurements ◽  
Current Controller ◽  
Signal Cancellation ◽  
Rotating Reference Frames ◽  
Dsc Method ◽  
Dual Sequence

Manuscript submitted to the Twenty-second IEEE Workshop on Control and Modeling for Power Electronics (COMPEL 2021).<div>Abstract: Dual-sequence current controllers of voltage source converters (VSCs) feature two separate rotating reference frames (RRFs), commonly named dq frames, and rely on techniques that isolate the positive and negative sequences of three-phase measurements. One of these techniques is the delayed signal cancellation (DSC). It is performed in the stationary reference frame (SRF), also known as αβ frame. The DSC combines old values of one axis with new values of the other axis of the SRF. The results are, then, transformed into the RRFs for use in the current controller. This filtering process introduces an extra layer of complexity for dual-sequence current controllers, which could otherwise operate solely in the RRFs. This paper introduces a frequency adaptive DSC method that operates directly in the RRF. Moreover, an averaging of two of the proposed DSC filters with contiguous integer delays is employed for reducing discretization errors caused by grid frequency excursions. A formal proof of the equivalence between the αβ and dq DSC methods is presented. Furthermore, computer simulations of a case study support the interpretation of the results.</div>

scholarly journals MODEL OF TWO-MASS ELECTROMECHANICAL SYSTEM

2010 ◽  
Vol 2 (1) ◽  
pp. 85-89
Author(s):  
Sigitas Juraitis
Keyword(s):  
System Dynamics ◽  
Induction Motor ◽  
Reference Frame ◽  
Computer Model ◽  
Electromechanical System ◽  
Stationary Reference Frame

The computer model of electromechanical system with elasticity and clearance is elaborated. Model of induction motor is developed in stationary reference frame. Results of simulation are presented and discussed. Conclusions about influence of finite stiffness and clearance on the system dynamics are made.

scholarly journals Dual Sequence Controller with Delayed Signal Cancellation in the Rotating Reference Frame

2021 ◽  
Author(s):  
Daniel Mota ◽  
Erick Alves ◽  
Elisabetta Tedeschi
Keyword(s):  
Reference Frame ◽  
Reference Frames ◽  
Formal Proof ◽  
Voltage Source ◽  
Phase Measurements ◽  
Current Controller ◽  
Signal Cancellation ◽  
Rotating Reference Frames ◽  
Dsc Method ◽  
Dual Sequence

Manuscript submitted to the Twenty-second IEEE Workshop on Control and Modeling for Power Electronics (COMPEL 2021).<div>Abstract: Dual-sequence current controllers of voltage source converters (VSCs) feature two separate rotating reference frames (RRFs), commonly named dq frames, and rely on techniques that isolate the positive and negative sequences of three-phase measurements. One of these techniques is the delayed signal cancellation (DSC). It is performed in the stationary reference frame (SRF), also known as αβ frame. The DSC combines old values of one axis with new values of the other axis of the SRF. The results are, then, transformed into the RRFs for use in the current controller. This filtering process introduces an extra layer of complexity for dual-sequence current controllers, which could otherwise operate solely in the RRFs. This paper introduces a frequency adaptive DSC method that operates directly in the RRF. Moreover, an averaging of two of the proposed DSC filters with contiguous integer delays is employed for reducing discretization errors caused by grid frequency excursions. A formal proof of the equivalence between the αβ and dq DSC methods is presented. Furthermore, computer simulations of a case study support the interpretation of the results.</div>

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