중전압 계통 연계를 위한 멀티 센트럴 대용량 태양광 발전 시스템의 공통 모드 전압 억제
- Title
- 중전압 계통 연계를 위한 멀티 센트럴 대용량 태양광 발전 시스템의 공통 모드 전압 억제
- Other Titles
- Suppression of Common-Mode Voltage in a Multi-Central Large-Scale PV Generation Systems for Medium-Voltage Grid Connection
- Author
- 김래영
- Keywords
- central inverter; medium voltage; common mode; leakage current
- Issue Date
- 2014-02
- Publisher
- 전력전자학회
- Citation
- 전력전자학회 논문지 / The Transactions of the Korean Institute of Power Electronics, 2014, 19(1), P.31-40
- Abstract
- This paper describes an optimal configuration for multi-central inverters in a medium-voltage (MV) grid, which is suitable for large-scale photovoltaic (PV) power plants. We theoretically analyze a proposed common-mode equivalent model for problems associated with multi-central transformerless-type three-phase full bridge(3-FB) PV inverters employing two-winding MV transformers. We propose a synchronized PWM control strategy to effectively reduce the common-mode voltages that may simultaneously occur. In addition, we propose that the existing 3-FB topology may also have the configuration of a multi-central inverter with a two-winding MV transformer by making a simple circuit modification. Simulation and experimental results of three 350kW PV inverters in a multi-central configuration verify the effectiveness of the proposed synchronization control strategy. The modified transformerless-type 3-FB topology for a multi-central PV inverter configuration is verified using an experimental prototype of a 100kW PV inverter.
- URI
- http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JRJJC3_2014_v19n1_31
- ISSN
- 1226-623x; 1229-2214
- DOI
- 10.6113/TKPE.2014.19.1.31
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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