An islanding operation of DC smart grid

Author

Kurohane, Kyohei ; Uchida, Kosuke ; Goya, Tomonori ; Senjyu, Tomonobu ; Yona, Atsushi ; Urasaki, Naomitsu ; Funabashi, Toshihisa

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of the Ryukyus, Okinawa, Japan

fYear

2010

fDate

10-13 Oct. 2010

Firstpage

426

Lastpage

431

Abstract

Recently, smart grids are attracting attention. Already, a smart grid based on AC grid is proposed. However, due to the power fluctuation from renewable energy sources, voltage and frequency deviations are occurred in island power systems. This paper presents an islanding operation method of DC smart grid. The power system consists of photovoltaics, wind generators and controllable loads. In this paper, the DC bus voltage fluctuations of DC grid are reduced by the photovoltaics, the wind generators and the controllable loads. Therefore, the DC bus voltage is maintained within the acceptable range by applying the power control of the photovoltaics and the wind power generators and the power consumption control under the droop characteristics. As controllable loads, electric water heater and electric vehicle are assumed. Effectiveness of the proposed method is verified by numerical simulation results.

Keywords

electric vehicles; smart power grids; wind power; AC grid; DC bus voltage; DC smart grid; electric vehicle; frequency deviation; islanding operation; power control; voltage deviation; wind generator; Batteries; Control systems; Generators; Inverters; Power generation; Smart grids; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2010 International Conference on

Conference_Location

Incheon

Print_ISBN

978-1-4244-7720-3

Type

conf

Filename

5664397