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| Analysis of the Causes of Phase Angle Difference in the Distribution Networks of a Paper Mill and Design of the Loop Closure Retrofitting Scheme |
| Received:October 20, 2025 Revised:November 11, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.04.028 |
| Key Words:paper mill distribution network phase angle difference loop closure |
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| Abstract:This study conducted an in-depth analysis of the distribution network system upgrade at a paper mill. The main distribution networks in the northern and southern plant zones exhibited a fixed 30° phase difference. By analyzing the causes of the phase difference and its potential effects and risks on distribution networks， and after comprehensive evaluation of field operating conditions and safety reliability， a transformer connection group adjustment approach was proposed through multi-scenario comparisons to eliminate phase differences in distribution network loop closure retrofitting schemes. |
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