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Effects of Distribution System Operations on Voltage Profiles in Distribution Grids Connected Wind Power Generation

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1 Author(s)
Chun-line Su ; Member, IEEE, Department of Marine Engineering, National Kaohsiung Marine University, Kaohsiung, 805 TAIWAN. e-mail: cls@mail.nkmu.edu.tw

Wind power is one of the most common renewable energy sources and its penetration in distribution grids would be further increasing. For distribution grids connected wind power generation, the steady-state voltage variation is an important issue for the system planning purpose. At the distribution level, there are a number of attributes that can influence the voltage profiles; therefore, the analysis of the voltage variations in the distribution grids with wind turbines requires detailed distribution operation models. To fully evaluate the actual nodal voltage profiles in distribution grids connected wind power generation, the distribution system operation uncertainties including daily time varying load, stochastic wind power generation, network reconfiguration, and voltage control devices operation are modeled and taken into account in the analysis. A probabilistic load flow method based an efficient algorithm is used to obtain the voltage distributions in a fixed network configuration. The final distributions are evaluated based on the probability associated with each configuration. The voltage control devices then are operated to improve voltage distributions based on an AC sensitivity matrix. The proposed probabilistic models can provide the actual voltage distributions in the future system and be used for assessing the effect of wind power on distribution operating performance. Test results of a modified IEEE 13 node feeder test system are presented.

Published in:

2006 International Conference on Power System Technology

Date of Conference:

22-26 Oct. 2006