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| Study on the Duality of the Three-phase Four-wire System APF |
| Luo Jin1, Xu Xiaojuan2, Li Yang1 |
1.Nanjing Huashi Electronic Scientific Co., Ltd, Nanjing 210016;
2.Anhui University of Technology, Maanshan, Anhui 243032 |
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Abstract The dual technology of carrier wave shifting was adopted in this paper, not only the higher equivalent switching frequency was obtained under the condition of invariant main circuit topology and no improvement in the switching frequency of the inverter, but the greater capacity and the well harmonic compensation. The multi-change principle of the SPWM was introduced, which is applied in the APF of parallel three-phase four-wire system. Then the APF harmonic drawing and the optimal design of its control strategy was also given in the paper. According to the double change principle, the APF engineering prototype with 150kVA is developed in the end, the experimental results show that the entire system is steady and reliable, its electrical performance can satisfy the technical requirements and compensation effect is obvious.
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Published: 25 July 2013
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2013, Vol. 14 
