DOI:10.1007/s40565-018-0399-z |
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Modeling method of sequence admittance for three-phase voltage source converter under unbalanced grid condition |
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Page view: 0
Net amount: 610 |
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Author:
Yang CEN1, Meng HUANG1, Xiaoming ZHA1
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Author Affiliation:
1. School of Electrical Engineering, Wuhan University, Wuhan, China
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Foundation: |
This work was supported by National Natural Science Foundation of China (Nos. 51637007, 51507118). |
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Abstract: |
The admittance is a strong tool for stability analysis and assessment of the three-phase voltage source
converters (VSCs) especially in grid-connected mode. However, the sequence admittance is hard to calculate when the VSC is operating under unbalanced grid voltage conditions. In this paper, a simple and direct modeling method is proposed for a three-phase VSC taking the unbalanced grid voltage as a new variable for the system. Then coupling in the three-phase system can be calculated by applying the harmonic linearization method. The calculated admittance of three-phase VSCs is verified by detailed circuit simulations. |
Keywords: |
Unbalanced grid voltage, Three-phase voltage source converter, Harmonic linearization, Positive and negative sequence admittance, Stability |
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Online Time:2018/05/10 |
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