Wind_Energy_Essentials_Lecture 4

Mohan 2010 44 step up boost converter il vo c vl vin

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Unformatted text preview: ) Vd ( qa e j 0 qbe j 2 / 3 qc e j 4 / 3 ) N qa qb qc Figure 7-1 Switch-mode inverter. v2 (010) sector 2 v3 (011) sector 3 vs sector 1 v6 (110) v1 (001) a -axis sector 4 sector 5 sector 6 a vs (000) v0 0 a vs (001) v1 Vd e j 0 a vs (010) v2 Vd e j 2 / 3 a vs (011) v3 Vd e j / 3 a vs (100) v4 Vd e j 4 / 3 a vs (101) v5 Vd e j 5 / 3 a vs (110) v6 Vd e j a vs (111) v7 0 v4 (100) © Copyright N. Mohan 2010 v5 (101) 49 Present Wind Turbines 20 1800 Stray Currents due to Converter Switchings cause Damage to Bearings Heavy Cables 80-100 m Power Electronics Converter with Large Storage Capacitors Converter 161 kV 690 V, 60-Hz 34.5 kV, 60-Hz Underground Heavy Transformer 60 Hz © Copyright N. Mohan 2010 50 Proposed Generation System: Improving Reliability and Reducing the Nacelle Weight by 20% and Reducing the Nacelle Weight by 20% Open-end Open-end winding ac winding ac machine machine MC MC System System Utility Utility 20 20 1800 1800 High frequency transformer High frequency transformer converter system converter system High-Frequency High-Frequency Transformer and Transformer and Transformer and Transformer and Converter Converter Light Cable att 34..5 kV Light Cable at 34 5kV Cable a...
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