A three-phase load balancing method and device for distribution network main and branch lines

Abstract

The invention discloses a three-phase load balance method and device for a main line and branched lines of a power distribution network. The method comprises the following steps: when the three-phase load of the main line is unbalanced, determining a phase adjustment pair of the main line and corresponding adjustment magnitude; selectively adjusting the branched lines in the branched lines with high phase switching for source phase total power load, marking commutation devices without supplying power for load devices internally provided with magnetic moving components on the source phases of the adjusted branched lines, selecting required commutation devices from the marked commutation devices, and if the marked communication devices are insufficient, selecting the communication devices from the unmarked communication devices; enabling the sum of the power loads of the communication devices selected from each adjusted branched line to be equivalent to the adjustment magnitude of the main line, and switching the access switching of the communication devices selected on the branched lines to target phase, so that the three-phase load of the main line and the branched lines reach a balance requirement. Commutation vibration is prevented from occurring in the load devices internally provided with the magnetic moving components at the user client to generate noise, and the stable operation is maintained.

Description

Technical field [0001] The present invention relates to a load balancing technology for a distribution network, in particular to a three-phase load balancing method for the main and branch lines of a distribution network suitable for low-voltage distribution networks, and a distribution network main and branch circuit suitable for realizing the balance method. The branch line three-phase load balancing device belongs to the technical field of low-voltage power distribution network power distribution. Background technique [0002] The load of the low-voltage distribution network is generally composed of a mixture of three-phase loads and single-phase loads. Residential electricity is all single-phase loads. The distribution network is more complicated, especially a large number of single-phase loads are connected to the distribution system of the low-voltage distribution network, and the load The size is different and the power consumption time is different. Therefore, the three-p...

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Problems solved by technology

The technical solution disclosed in the above-mentioned Chinese patent does not consider the load characteristics of the load device it supplies when selecting the commutation device. For example, the load device has a built-in magnetic moving part such as a motor. Commutation vibration, noise, load device can not run stably

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