Simplified model predictive current control strategy for dual five-phase VSI-fed open end load to eliminate common-mode voltage and reduce current harmonics

2021 ◽  
Author(s):  
Huu-Cong Vu ◽  
Hong-Hee Lee
Keyword(s):  
Control Strategy ◽  
Current Control ◽  
Simplified Model ◽  
Common Mode ◽  
Current Harmonics ◽  
Common Mode Voltage

Analysis and Suppression of Common-Mode Voltage in Open-End Winding Induction Motor Drive System Fed by Dual Inverter

2014 ◽  
Vol 986-987 ◽  
pp. 1048-1053
Author(s):  
Qun Tao An ◽  
Guang Lin Wang ◽  
Ming Hang Duan ◽  
Li Sun
Keyword(s):  
Induction Motor ◽  
Fault Tolerant ◽  
Current Control ◽  
Induction Motor Drive ◽  
Multilevel Converters ◽  
Common Mode ◽  
Common Mode Voltage ◽  
New Space ◽  
Motor Drive System ◽  
Open End Winding

Dual inverter fed open-end winding induction motor (OEW-IM) is a new solution for multilevel drive. Comparing with traditional multilevel converters, the dual inverter is being interested in for its more flexible current control, the absence of fluctuating neutral point, and fault-tolerant capability. This paper analyzes the potential common-mode voltage (CMV) in the open-end winding induction motor system, and proposes a new space vector PWM (SVPWM) strategy to reduce the CMV. The proposed method is validated by simulations and experiments.

Model Predictive Current Control of a Three-Phase T-Type NPC Inverter to Reduce Common Mode Voltage

2017 ◽  
Vol 27 (02) ◽  
pp. 1850028 ◽  
Author(s):  
Eedara Aswani Kumar ◽  
Koritala Chandra Sekhar ◽  
Rayapudi Srinivasa Rao
Keyword(s):  
Control Method ◽  
Current Control ◽  
Computationally Efficient ◽  
Common Mode ◽  
Common Mode Voltage ◽  
Bias Factor ◽  
Three Phase ◽  
Objective Model ◽  
Control Set ◽  
Peak Value

This paper presents a reduced control set model predictive control (RCSMPC) method for three-phase T-type neutral-point-clamped (NPC) inverter. The whole control set (WCS) consists of all the 27 switching states of T-type NPC inverter. The reduced control set (RCS) with 19 switching states is formed from WCS by excluding the switching states with common mode voltage (CMV) value higher than one-sixth of input DC voltage [Formula: see text]. With RCS, single-objective model predictive current control method can restrict the CMV peak value to [Formula: see text]. To further reduce the CMV below this threshold, a cost function with the weighted sum of two control targets is formulated in the RCSMPC method. The two control targets of RCSMPC method are CMV mitigation and load current control. The weight for CMV is called bias factor. The RCSMPC method is computationally efficient, as the number of switching states is less than that of WCSMPC. To further reduce the computational burden, CMV values corresponding to all the switching states are calculated offline and stored in memory. Robustness of both the methods is investigated with parameter deviations at different bias factors and reference currents. The proposed method is validated using simulation and experimental results and compared with the existing methods.

scholarly journals A New Dynamic Voltage Restorer with Multi-level Open-end Winding Topology

2020 ◽  
Vol 165 ◽  
pp. 06013
Author(s):  
Jingyuan Yin ◽  
Jinke Li ◽  
Qunhai Huo ◽  
Lixin Wu ◽  
Libo Han ◽  
...  
Keyword(s):  
Control Strategy ◽  
Level Structure ◽  
Low Frequency ◽  
Common Mode ◽  
Loop Control ◽  
Common Mode Voltage ◽  
The Common ◽  
Multi Level ◽  
Voltage Feedback ◽  
Open End Winding

In this paper, a variety of main circuit structures of DVR based on open-end winding are presented. Two inverters are connected in series to realize the multi-level structure and simplify the hardware cost. According to the mathematical model of open-end DVR, a three loop control strategy based on load voltage feedback is implemented to suppress the resonance of LCL filter. Aiming at the common mode voltage problem of open-end winding DVR, a common mode voltage suppression strategy based SVPWM is proposed to completely suppress the common mode voltage of high frequency and low frequency of the system. Finally, an open-end DVR experimental platform is built to verify the effectiveness of the control strategy and modulation strategy.

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