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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chong Han Martin, D.E. Lezama, M.R. |
| Copyright Year | 2009 |
| Description | Author affiliation: Grid System Consulting, ABB Inc, Raleigh, North Carolina, USA (Chong Han; Martin, D.E.) || BP Wind Energy, Houston, Texas, USA (Lezama, M.R.) |
| Abstract | Recently, renewable wind energy is enjoying a booming growth globally to become an important green electricity source to replace fossil fuels. Different from a classical generation plant consisting of synchronous generators, large wind farms are typically made up of many wind turbine generators (WTGs) rated up to several-MWs so far and connected through underground cables in a geographical terrain. The types of WTGs are diversified, which can be a fixed-speed induction generator, a variable-speed induction generator, a double-fed induction generator (DFIG), or a full-scale back-to-back (BtB) AC-DC-AC VSC-connected (voltage source converter) WTG. These combined unique characteristics of a wind farm can be potential factors for over-voltages which can cause surge arresters and equipment failure within a wind farm. In the paper, an investigation of transient over-voltages (TOV) during wind farm switching events and the impact of generator step-up transformer (GSU) configuration and solutions to suppress the TOV during these events was conducted on a large wind farm (300 MW). Two different types of WTGs, which are a fixed speed squirrel cage induction generator (SCIG) and a full-scale BtB VSC type WTG, were studied. Two GSU transformer configurations, Δ/Yg or Yg/Yg, were analyzed. Two methods of mitigating the TOV which were evaluated are the grounding transformer and fast grounding switch. Their performance and significance were demonstrated. The feasibility using COG (coefficient of grounding) analysis method for renewable wind generation grounding design is discussed. |
| Starting Page | 1 |
| Ending Page | 7 |
| File Size | 952624 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781424449347 |
| DOI | 10.1109/SUPERGEN.2009.5348165 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-04-06 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Transient over-voltage Induction generator Grounding Induction generators Back-to-back converter Switches Converters Fossil fuels Power conversion Wind energy generation Wind energy Wind turbine generator Generator step-up transformer Wind farms Synchronous generators Coefficient of grounding Grounding transformer |
| Content Type | Text |
| Resource Type | Article |
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