Three-range current recording and balance analysis method and device

Abstract

The invention provides a method and apparatus for recording and equally analyzing three-phase current, including: detecting continuously and storing three-phase current data by a distribution room; retrieving periodically storage data; reading and processing three-phase current data using computed installed with three-phase current analysis software; calculating imbalance rate of three-phase current; obtaining data table, three-phase current variation curve and imbalance rate variation curve notated by apparatus number and detecting time; inquiring and analyzing integrally the data and curve, so as to obtain imbalance degree of three-phase power load. The apparatus includes a three-phase current detection storage apparatus and a computer. The invention is capable of analyzing and managing line loss control of, and can be applicable for analytical adjustment of three-phase load imbalance of rural area low-voltage distribution system and control management of transmission line loss.

Description

technical field [0001] The invention relates to the analysis and adjustment of the three-phase load balance of a low-voltage power grid, in particular to a method and device for three-phase current recording and balance analysis. Background technique [0002] In the power distribution system of the rural low-voltage power grid, due to the use of three-phase power supply, and the actual user has a large single-phase load, there is often an unbalanced operation of the three-phase power load, resulting in an increase in the loss and line loss of the distribution transformer, and even in severe cases. The line is blown and the transformer is burned, which brings about a decline in the reliability and stability of the power grid. In the management of distribution transformer operation, in order to detect the unbalanced degree of the actual three-phase power load (current), in order to take effective control measures in time, it is necessary to regularly collect and analyze the cu...

AI Technical Summary

Problems solved by technology

[0003] 1. The workload of meter reading is heavy, time-consuming and labor-intensive, the work efficiency is low, and error-prone

[0004] 2. Random and unscientific

Because household appliances such as household lighting and rural processing equipment use electricity at different times, most electricians work in the daytime, and the time for meter reading is not fixed. They may encounter peaks or valleys of the phase load, which cannot accurately and completely reflect low-voltage distribution. Distribution of three-phase line loads in the electrical system

[0005] 3. The data collection interval is too large and the data samples are too few

[0006] 4. Data analysis and comparison are not intuitive, and it is difficult to describe and reflect the load distribution of three-phase lines

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