An Algorithm for Phase Sequence Recognition of Distribution Transformers

Abstract

A phase sequence identification algorithm of a distribution transformer comprises the steps of pre-processing data, calculating voltage of a distribution unit-area after three-phase calibration, taking ten groups of data, sequencing voltages of the distribution unit-area at each moment after three-phase calibration, comparing three-phase voltage of each distribution unit-area with circuit voltage,and finally determining a phase sequence condition of the distribution unit-area. The three-phase voltages of a 10kV circuit are sequenced in a descending order according to the characteristic that avoltage of a high-voltage side of the 10kV circuit and three-phase line voltage of the distribution transformer are not completely equal, the three-phase voltages of the distribution unit-area of thesame line at each moment are sequenced in the descending order, and the phase sequence condition of all distribution unit-areas of the same circuit is solved under the condition that the phase sequence of the 10kV circuit is correct. The example shows that the phase sequence condition of the distribution transformer can be accurately determined by the method, and the method is suitable for application and promotion on a large scale.

Description

technical field

[0001] The invention relates to a phase sequence recognition algorithm of a power distribution transformer, which belongs to the technical field of power distribution and utilization. Background technique

[0002] The accuracy of metering and wiring of electric energy meters in distribution stations is directly related to the vital interests of power companies and customers. The more standardized. The wiring method of the electric energy meter at the gateway of the distribution station area is generally a three-phase four-wire type. Due to the complexity of the wiring, the phase sequence is often reversed, which often has a greater impact on the daily settlement of electric energy and line loss management.

[0003] At present, with the continuous improvement of power consumption information collection and other systems, the acquisition of terminal metering information and customer power consumption information has become easier. The power distribution data h...

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