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Selection method of transformer interconnecting distributed generation and distribution networks

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6 Author(s)
Shouzhen Zhu ; State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing, China ; Lin Geng ; Jinghong Zheng ; Xiaoyu Wang
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Recently, DG (distributed generation) is rapidly developed around the world. But there are several problems in the grid-connected operation. The paper focuses on the selection of proper transformers to meet the grounding requirements in the distribution networks. Through theory analysis and simulation, optimal selection methods are proposed. Yg/¿-connection transformer is suitable for small resistance grounding distribution networks while ¿ /Yg and ¿ / ¿ connection transformers are fit for small current neutral grounding networks. The conclusions are useful for the DG-connected power system.

Published in:

2009 Transmission & Distribution Conference & Exposition: Asia and Pacific

Date of Conference:

26-30 Oct. 2009