标题：Design and Implementation of Three-Terminal and FiveTerminal Hybrid AC DC Micro Grid with an Improved Grid Current and DC Capacitor Voltage Balancing Method
期刊名称：International Journal of Advances in Engineering and Management
电子版ISSN：2395-5252
出版年度：2020
卷号：2
期号：7
页码：869-876
DOI：10.35629/5252-0207822824
语种：English
出版社：IJAEM JOURNAL
摘要：Micro grid structures allow more efficient utilization of renewable energy resources as well as for autonomous operation such as small scale distributed generators. A three terminal hybrid AC/DC micro grid with two DC terminals and one AC terminal and a similar five terminal micro grid are proposed in this paper. The projected system consists of cascaded H-bridge (CHB) converters based mostly AC grid interface and 2 twin active bridge (DAB) converters based DC sub grid interface that connects 2 isolated DC buses. In order to decrease the number of power conversion stages and power devices, the DAB converters are directly connected to CHB DC rails according to the system operation requirement. To beat the unbalanced grid currents and DC rail voltages caused by this changed system configuration with solely 2 power conversion stages, AN improved technique is projected through zero sequence voltage injection and therefore the voltage or current regulation of the system, impacts of the control parameters to the system stability and dynamic responses are investigated. Analysis results from each three terminals and five terminal hybrid AC/DC micro grids shows generalized effectiveness of the projected 3 phase AC current and DC rail voltage leveling technique.
