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| Design and overheat analysis of container-type large capacity DC de-icer |
| PAN Guohong |
| China Southern Power Grid Extra High Voltage Company, Guangzhou 510000 |
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Abstract For large capacity DC de-icing system, the rectifier and control cabinet are built in a valve hall generally. In order to save the occupied area and the construction period, this paper has a study for the rectifier and control cabinet, valve cooling system layout in the container. This paper proposes a design ofr converter, temperature control, waterproof, flame retardant, anti-seismic, operation and maintenance convenience for the container-type DC de-icer. The converter transformer and container have overheat faults during zero power test. Harmonic is the root cause for converter transformer overheat, and eddy current is the root cause for container overheat. Measures like thickening magnetic shield, rewinding the line side winding and adding a voltage regulating winding for converter transformer, replacement of non-magnetic stainless steel material and cut closed magnetic circuit for container are given to solve the overheat faults. It is found that the design of container-type large capacity DC de-icer is completely feasible, which lays a theoretical foundation for the operation converter station optimization and upgrading.
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Received: 01 July 2022
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2022, Vol. 23 
