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| Principle and Performance of the Three-Phase Digital Phase-Locked Loop |
| Gong Jinxia1, Xie Da1, Zhang Yanchi2, 3 |
| 1. Shanghai Jiaotong University Shanghai 200240 China 2. East China University of Science and Technology Shanghai 200237 China 3. Shanghai Dianji University Shanghai 200240 China |
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Abstract This paper analyzes the fundamental principle and performance of three-phase phase-locked loop. and the harmonic component in variable situations. It deducts the error influence on three-phase locked phase when the three-phase input signals are offsetting, unbalanced or with harmonics. The theoretical conclusions are confirmed by detailed simulations under the situations, such as offsetting, unbalance, harmonic, phase-abrupt and frequency-abrupt. The simulation results prove that the three-phase phase-locked loop can work well in disturbance situation and variable frequency system when the frequency of the inputs is variable.
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Received: 19 March 2008
Published: 17 February 2014
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2009, Vol. 24 
