Power plant high-capacity main transformer loss test system and method

Abstract

The invention discloses a power plant high-capacity main transformer loss test system and method. An excitation system is connected with a generator, and the output end of the generator is connected with one end of a main transformer high-voltage side isolation knife switch and one end of a main transformer high-voltage side grounding knife switch through a main transformer; the other end of the main transformer high-voltage side isolation knife switch is connected with a main transformer high-voltage side circuit breaker, and the other end of the main transformer high-voltage side grounding knife switch is grounded; a measuring-level voltage transformer and a measuring-level current transformer are arranged on a line between the generator and the main transformer, and the wave recording analyzer is connected with the measuring-level voltage transformer and the measuring-level current transformer.According to the system and the method, the loss of the main transformer can be accuratelycalculated; and the requirements of an existing main transformer loss test can be met.

Description

technical field [0001] The invention belongs to the field of high-voltage testing of electric equipment, and relates to a testing system and method for testing the loss of a large-capacity main transformer in a power plant. Background technique [0002] The main transformer, as a kind of electrical equipment for voltage transformation and power generation in a power plant, plays a very important role in the power plant system. In operation, the active power loss and reactive power loss generated by the main transformer itself account for about 10% of the power generation, and the main transformer loss is one of the main losses of the power plant. Therefore, reasonable calculation of transformer loss power and accurate calculation and analysis of transformer loss values ​​are of great significance for clarifying the annual loss characteristics of transformers with different voltage levels and calculating power generation. [0003] The main transformer loss is divided into ir...

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Problems solved by technology

The calculation formula method needs to accurately obtain the values ​​of no-load loss and load loss, but with the continuous development of large-scale thermal power units in recent years, t

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