Modelling and Analysis of Zero-Sequence Current in Power Electronics Mission Profile Emulator for Photovoltaic Application

カテゴリ: 研究会(論文単位)

論文No: SPC25018,MD25018

グループ名: 【D】産業応用部門 半導体電力変換/【D】産業応用部門 モータドライブ合同研究会

発行日: 2025/01/20

タイトル(英語): Modelling and Analysis of Zero-Sequence Current in Power Electronics Mission Profile Emulator for Photovoltaic Application

著者名: Zhu Wenjie(Shanghai Jiao Tong University),Xia Shihao(Shanghai Jiao Tong University),Ma Ke(Shanghai Jiao Tong University)

著者名(英語): Wenjie Zhu(Shanghai Jiao Tong University),Shihao Xia(Shanghai Jiao Tong University),Ke Ma(Shanghai Jiao Tong University)

キーワード: Mission profile emulation|testing|reliability|Zero-sequence current|Photovoltaic|Mission profile emulation|testing|reliability|Zero-sequence current|Photovoltaic

要約(日本語): As the wide integration of photovoltaic (PV) power generation in modern power grids, reliability of PV converters is becoming crucial, and there is an urgent need for comprehensive testing before the PV converters are put into field operation. Due to comp

要約(英語): As the wide integration of photovoltaic (PV) power generation in modern power grids, reliability of PV converters is becoming crucial, and there is an urgent need for comprehensive testing before the PV converters are put into field operation. Due to complex mission profiles, significant challenges have been experienced to the reliability testing of power electronics. A mission profile emulation (MPE) system, involving a three-level neutral-point-clamped (NPC) converter and a two-level converter through face-to-face connection, is proposed as a promising method for new approaches of converter testing, offering programmable mission profiles, improved testing efficiency and reduced testing costs. Typically, in order to reduce power loss, the DC links of two converters in MPE system are connected to achieve power circulation, which inevitably creates zero-sequence current, as can be classified as high-frequency zero-sequence ripples and low-order zero-sequence harmonics, and will further result in current distortions. However, in terms of MPE system with different converter topologies and mismatched carriers, mechanism of zero-sequence current excitation remains unclear, and the potential sampling distortions and control errors have seldomly been studied. In this paper, the mathematical model of zero-sequence current in the MPE system with different converter topologies and mismatched carriers is established. Impacts of the zero-sequence current, including waveform distortions, sampling distortions and control errors, are also discussed in details. Simulation in PLECS and experiment on a prototype are carried out to validate the analysis.

本誌: 2025年1月23日-2025年1月24日半導体電力変換/モータドライブ合同研究会-1

本誌掲載ページ: 99-107 p

原稿種別: 英語