Research Article
Evaluation of Harmonic Content from a Tap Transformer Based Grid Connection System for Wind Power
Table 2
Current distortion limits for general distribution systems (120 V through 69 kV).
| | Maximum harmonic current distortion in percent of | | Individual harmonic order (odd harmonics) | | <11 | | | | | TDD |
| | <20 | 4.0 | 2.0 | 1.5 | 0.6 | 0.3 | 5.0 | | 20–50 | 7.0 | 3.5 | 2.5 | 1.0 | 0.5 | 8.0 | | 50–100 | 10.0 | 4.5 | 4.0 | 1.5 | 0.7 | 12.0 | | 100–1000 | 12.0 | 5.5 | 5.0 | 2.0 | 1.0 | 15.0 | | >1000 | 15.0 | 7.0 | 6.0 | 2.5 | 1.4 | 20.0 |
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Even harmonics are limited to 25% of the odd harmonic limits above.
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