Hybrid resonant three‐level ZCS converter suitable for photovoltaic power MVDC distribution network. Issue 11 (21st July 2020)

• Record Type: Journal Article
• Authors: Azeem, Syed Waqar; Tariq, Irfan; Mehmood, Kashif; Ehab, Muhammad; Rizwan, Mian; Mond, Muhammad Asim
• Is Part Of: IET renewable power generation. Volume 14:Issue 11(2020)
• Page Start: 1956
• Page End: 1963
• Publication Date: 2020-07-21
• Subjects: zero current switching -- PWM power convertors -- switching convertors -- distributed power generation -- photovoltaic power systems -- resonant power convertors -- power transformers; auxiliary circuit -- switching loss -- auxiliary transformer -- photovoltaic power MVDC distribution network -- hybrid resonant three‐level zero‐current‐switching converter -- distributed photovoltaic power applications accessing medium‐voltage DC distribution network -- switches -- ZCS condition -- hybrid resonant three‐level ZCS converter -- neutral point clamped TL circuit -- pulse width modulation technique -- PLECS simulation -- TL ZCS converter -- power 1500.0 W -- voltage 300.0 V to 1500.0 V; Renewable energy sources -- Periodicals; 333.79405
• DOI: 10.1049/iet-rpg.2019.1401
• Languages: English
• ISSNs: 1752-1416

Abstract

Abstract : This study presents a hybrid resonant three‐level (TL) zero‐current‐switching (ZCS) converter for distributed photovoltaic power applications accessing medium‐voltage DC (MVDC) distribution network. The main constituents of the converter is a neutral point clamped TL circuit, an auxiliary circuit along with two transformers and six switches. The ZCS condition of the TL circuit is reached by operating the auxiliary circuit utilising pulse width modulation technique. It delivers the majority of the power and the switching loss is remarkably reduced. A section on the influence of the turn's ratio of the auxiliary transformer on the current is also presented. The piecewise linear electrical circuit simulation simulation results validate the designed parameter principles. For the sake of comparison, an experimental prototype is developed of 300–1500 V/1500 W to validate the performance of the proposed converter.