Active NPC 인버터의 모델링 및 성능 분석

Alternative Title
Heungseok Park
Alternative Author(s)
Heungseok Park
일반대학원 전자공학과
The Graduate School, Ajou University
Publication Year
본 논문에서는 NPC (Neutral-Point-Clamped) 인버터와 ANPC (Active Neutral-Point-Clamed) 인버터의 특성과 성능을 비교 분석한다. NPC 인버터는 스위칭 소자들 사이에 스위칭 손실이 불평등하기 때문에 특정 소자들이 다른 소자들에 비하여 수명이 짧아진다. 이를 개선하기 위해 NPC 인버터의 중성점 다이오드를 스위칭 소자로 교체한 것이 ANPC 인버터이다. ANPC 인버터는 기존의 NPC 인버터에 비해 스위칭 로드를 분산시켜 발열의 불균형을 해소하고 소자 수명을 증가시킨다. 기존의 NPC 인버터 시스템과 ANPC 인버터에 대하여 이론적인 특징과 성능을 분석하고 모델링과 시뮬레이션을 통하여 검토한다. 그리고 두 시뮬레이션을 바탕으로 NPC와 ANPC를 비교 분석한다. 향후 전력 변환 시스템을 구축하는데 있어서 NPC 및 ANPC 토폴로지의 선택, 스위칭 소자의 선정에 도움을 주고자 한다.
Alternative Abstract
This study analyzes the performance characteristics for conventional NPC (Neutral-Point-Clamped) and ANPC (Active Neutral-Point-Clamped) inverters. In these regards, a simulation process with deep analysis is carried out to investigate the performance characteristics of NPC and ANPC inverters, in addition to a comprehensive comparison between both inverters. Subsequently, the NPC inverter shows unequal switching losses between the switching elements, which results in uneven heat dissipation and eventually reduces the device’s lifetime cycles. Therefore, the ANPC inverter was emerged within the system to improve its performance. Where, the ANPC inverter has switching elements instead of neutral point diodes of the traditional NPC inverter. The simulation results of switching characteristics and heat dissipation were performed for the traditional NPC and ANPC inverters. Meanwhile, the comparison between the two topologies was presented and clarified. The results show that the ANPC inverter distributes heat dissipation through controlling the switching states and the current path. The outcome of this study demonstrates its capability to determine the circuit topology, devices as well as filters for multi-level inverters.

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Graduate School of Ajou University > Department of Electronic Engineering > 3. Theses(Master)
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