Suppression of Common-Mode Voltage Using a Multicentral Photovoltaic Inverter Topology With Synchronized PWM
- Title
- Suppression of Common-Mode Voltage Using a Multicentral Photovoltaic Inverter Topology With Synchronized PWM
- Author
- 김래영
- Keywords
- synchronous control; Central inverter; common mode; equivalent model; grid-connected; leakage current; medium voltage (MV); photovoltaic (PV); power plant; stray capacitor
- Issue Date
- 2014-09
- Publisher
- IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS
- Citation
- IEEE transactions on industrial electronics, Vol.61 No.9 [2014], pp. 4722-4733
- Abstract
- This paper describes an optimal configuration for multicentral 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 multicentral transformerless-type three-phase full bridge (3FB) PV inverters employing two-winding MV transformers. We propose a synchronized pulse width modulation (PWM) control strategy to effectively reduce the common-mode voltages that may simultaneously occur. In addition, we propose that the existing 3FB topology may also have the configuration of a multicentral inverter with a two-winding MV transformer by making a simple circuit modification. Simulation and experimental results of three 350 kW PV inverters in a multicentral configuration verify the effectiveness of the proposed synchronization control strategy. The modified transformerless-type 3FB topology for a multicentral PV inverter configuration is verified using an experimental prototype of a 100 kW PV inverter.
- URI
- http://ieeexplore.ieee.org/document/6658929/keywordshttp://hdl.handle.net/20.500.11754/52170
- ISSN
- 0278-0046
- DOI
- 10.1109/TIE.2013.2289905
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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