Space-Vector-Based Hybrid PWM for Zero-Sequence-Circulating-Current RMS and Common Mode Voltage Reduction in Two Parallel Interleaved Two-Level Converters

2020 ◽  
Vol 15 (3) ◽  
pp. 1195-1204
Author(s):  
Zhiyong Zeng ◽  
Zhongxi Li ◽  
Stefan M. Goetz
Keyword(s):  
Space Vector ◽  
Common Mode ◽  
Common Mode Voltage ◽  
Circulating Current ◽  
Zero Sequence

scholarly journals A Novel Low Common-Mode Voltage Modulation Strategy for ANPC-5L Inverter

2020 ◽  
Vol 185 ◽  
pp. 01015
Author(s):  
Fusheng Wang ◽  
Sai Weng ◽  
Lizhong Ye ◽  
Tao Chen
Keyword(s):  
Harmonic Distortion ◽  
Output Current ◽  
Space Vector ◽  
Common Mode ◽  
Common Mode Voltage ◽  
Zero Sequence ◽  
Implementation Method ◽  
Bus Voltage ◽  
Vector Modulation ◽  
Zero Sequence Voltage

In order to suppress the leakage current of the active neutral point clamed five-level (ANPC-5L) inverter, this paper proposes a novel low common-mode voltage (CMV) modulation strategy based on the space vector modulation thought. Only the 55 voltage vectors with low CMV amplitude instead of all 125 voltage vectors are utilized. The CMV amplitude is suppressed to one-twelfth of the DC bus voltage (Vdc). In the simplified five-level space vector diagram, “obtuse triangle” synthesis principle is used to control the CMV changes twice in each carrier cycle, and get lower output current total harmonic distortion (THD). According to the vector thought, a carrier implementation method based on zero sequence voltage injection and carrier splitting is proposed. This method simplifies the calculation and is easy to implement.Simulation results prove the correctness and feasibility of this low CMV modulation strategy.

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