Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model
Abstract
:1. Introduction
2. Harmonic Modeling of Double PWM Converter
2.1. Low-Order Harmonic Modeling
2.1.1. The Low-Order Harmonic Modeling of GSC in Sub-Synchronous State
2.1.2. The Low-Order Harmonic Modeling of RSC in Super-Synchronous State
2.1.3. The Low-Order Harmonic Modeling of the Inverter
2.2. High-Order Harmonic Modeling
3. Simulations and Experimental Results
3.1. The Low-Order Harmonics of GSCin Sub-Synchronous State
3.2. The Low-Order Harmonics of RSCin Sub-Synchronous State
3.3. The Low-Order Harmonics of RSC in Super-Synchronous State
3.4. The Low-Order Harmonics of GSC in Super-Synchronous State
3.5. The High-Order Harmonics of Current in Converter
4. Conclusions
- (1)
- In sub-synchronous state, both dc link voltage and grid current of GSC contain only the fundamental component.
- (2)
- In super-synchronous state, the rotor current contains only the fundamental component with an offset.
- (3)
- In the inverter side, the output current contains 5th, 7th, 17th order harmonics.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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A0n | n | A0n | |
---|---|---|---|
3 | 0.095 | 11 | 0 |
4 | 0 | 12 | 0 |
5 | 0.1 | 13 | 0 |
6 | 0 | 14 | 0 |
7 | 0.0475 | 15 | 0.0235 |
8 | 0 | 16 | 0 |
9 | 0.0475 | 17 | 0.0235 |
10 | 0 | 18 | 0 |
A0c | n | A0c | |
---|---|---|---|
3 | 0 | 11 | 0 |
4 | 0 | 12 | 0 |
5 | 0.1 | 13 | 0 |
6 | 0 | 14 | 0 |
7 | 0.0475 | 15 | 0 |
8 | 0 | 16 | 0 |
9 | 0 | 17 | 0.0235 |
10 | 0 | 18 | 0 |
n | A0na | A0nc | cn | cna |
---|---|---|---|---|
3 | 18 | 19 | 0.5% | 5.6% |
5 | 21 | 20 | 0.5% | 4.8% |
7 | 10.5 | 9.5 | 0.5% | 9.5% |
9 | 12.5 | 9.5 | 1.5% | 24% |
15 | 6.5 | 4.7 | 0.9% | 27.7% |
17 | 7.8 | 4.7 | 1.55% | 39.7% |
n | A0ca | A0cc | cc | cca |
---|---|---|---|---|
5 | 32 | 31.5 | 0.16% | 1.6% |
7 | 17 | 15 | 0.63% | 11.8% |
17 | 11 | 7.5 | 1.11% | 31.8% |
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Liu, J.; Liu, Z. Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model. Energies 2017, 10, 2087. https://doi.org/10.3390/en10122087
Liu J, Liu Z. Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model. Energies. 2017; 10(12):2087. https://doi.org/10.3390/en10122087
Chicago/Turabian StyleLiu, Jing, and Zhigang Liu. 2017. "Harmonic Analyzing of the Double PWM Converter in DFIG Based on Mathematical Model" Energies 10, no. 12: 2087. https://doi.org/10.3390/en10122087