Energy efficiency metering detection method of distribution transformer

Abstract

The invention provides an energy efficiency metering detection method of a distribution transformer. The method comprises the following steps: S1, establishing a reactive-loss two-port network model of the distribution transformer; S2, calculating an energy efficiency value of the distribution transformer in the reactive-loss two-port network model; S3, according to the energy efficiency value, establishing an energy efficiency detection device of the distribution transformer on the actual work condition and detecting an energy efficiency value of the distribution transformer on the actual work condition by using the detection device. According to the method, the energy efficiency value of the transformer on the actual work condition can be measured accurately; the uncertainty of measurement instrument introduction is low; adaptability is high; and the actual application value is great.

Description

technical field [0001] The invention relates to a detection method, in particular to a method for measuring and detecting the energy efficiency of a distribution transformer under actual working conditions. Background technique [0002] The power harmonics caused by nonlinear loads in the power grid aggravate the total loss of distribution transformers, resulting in a decrease in their load carrying capacity and a huge waste of electric energy. However, there are many factors affecting the total loss of transformers, and some of them are fuzzy and uncertain, which reduces the accuracy of energy efficiency state assessment. [0003] Because the loss of distribution transformer is affected by the size and type of load, it is not a fixed value. For a long time, the method of judging whether it is a high-loss distribution transformer at home and abroad generally measures its copper loss and iron loss through no-load test and short-circuit test. , and then compared with the nati...

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Problems solved by technology

[0002] The power harmonics caused by nonlinear loads in the power grid aggravate the total loss of distribution transformers, resulting in a decrease in their load carrying capacity and a huge waste of electric energy

However, there are many factors affecting the total loss of transformers, and some of them are fuzzy and uncertain, which reduces the accuracy of energy efficiency state assessment.

[0003] Because the loss of distribution transformer is affected by the size and type of load, it is not a fixed value. For a long time, the method of judging whether it is a high-loss distribution transformer at home and abroad generally measures its copper loss and iron loss through no-load test and short-circuit test. , and then compared with the national standards, this method of evaluating the static energy efficiency of transformers ignores the loss of transformers caused by factors such as nonlinear load effects and load imbalances in the actual grid

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