3상 3-레벨 컨버터의 누설전류 저감과 NP 전류 제어를 위한 캐리어 기반 LFCPWM = Carrier Based LFCPWM for Leakage Current Reduction and NP Current Control in 3-Phase 3-Level Converter

다국어 초록 (Multilingual Abstract)

This study proposes a carrier-based pulse width modulation (PWM) method for leakage current reduction and neutral point (NP) current control in a three-phase three-level converter, which is a carrier-based PWM version of the previously proposed low-frequency common mode voltage PWM. Three groups of space vectors with the same common mode voltage are used. When the averaged NP current needs to be positive or negative, the specific groups are employed to produce low-frequency common mode voltages. The validity of the proposed PWM method is verified through experiments.

참고문헌 (Reference)

1 이은철 ; 최남섭 ; 김희준, "양극성 DC 배전용 3상 3-레벨 컨버터의 누설전류 저감과 NP 전류 제어를 위한 공간벡터 PWM 방법" 전력전자학회 23 (23): 336-344, 2018

2 N. S. Choi, "Simple implementation of space vector PWM using barycentric coordinates" 45-46, 2015

3 J. S. Lee, "New modulation techniques for a leakage current reduction and a neutral-point voltage balance in transformerless photovoltaic systems using a three-level inverter" 29 (29): 1720-1732, 2014

4 U. M. Choi, "New modulation strategy to balance the neutral-point voltage for three-level neutral-clamped inverter systems" 29 (29): 91-100, 2014

5 Nho-Van Nguyen, "Carrier based PWM control of 3-level NPC inverter with DC neutral point balancing and common mode voltage reduction" 1213-1220, 2019

6 Tianbao Yu, "A modulation method to eliminate leakage current and balance neutral-point voltage for three-level inverters in photovoltaic systems" 2022

7 N. S. Choi, "A carrier-based meduim vector PWM strategy for three level inverters in transformerless photovoltaic systems" 2752-2757, 2015

8 Kang-Soon Ahn ; 최남섭 ; Eun-Chul Lee ; 김희준, "A Study on a Carrier Based PWM having Constant Common Mode Voltage and Minimized Switching Frequency in Three-level Inverter" 대한전기학회 11 (11): 393-404, 2016

9 이은철 ; 최남섭 ; 안강순, "3-레벨 인버터의 누설전류 제거를 위한 캐리어 기반 MVPWM의 과변조 특성" 전력전자학회 20 (20): 509-516, 2015