Original scientific paper

Beneficial investment for transformer maintenance

Marius Grisaru

Abstract

Transformer is the most important and pricey piece of equipment in the transmission system, so an adequate maintenance strategy is required to ensure uninterrupted electricity supply, preserve transformer life and minimize the investment. The crucial phases to ensure reliable and economical exploitation of a transformer within any maintenance strategy are inspection and audit of the manufacturing process, and adequate preparation before it is energized. Dissolved gas analysis (DGA) applied periodically is the most cost-effective test for transformers. However, excessive maintenance, tests or treatment can cause more damage to the insulating materials than prevent the potential failure. A specific maintenance policy is driven by economic aspects, consequences of power outage, insurance companies, and the knowledge and beliefs of the transformer owner. Despite proper maintenance, a small percentage of transformers will inevitably fail.

Keywords

power transformer; maintenance; transmission; dissolved gas analysis

Hrčak ID:

202536

URI

https://hrcak.srce.hr/202536

Publication date:

9.4.2018.

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