A low-voltage distribution network power load balancing method and device thereof

Abstract

The invention discloses an electrical load balancing method and device for a low-voltage power distribution network. The method comprises the steps that the electrical load of a main line is unbalanced, phase adjustment and a corresponding adjustment amount value of the main line are determined; adjustment branch lines are selected from branch lines of which the total phase power loads of phase adjustment pair source phases are high, phase commutation devices, not supplying power to load devices with built-in magnetic movement parts, on adjustment branch line source phases are identified, and the needed phase commutation devices are selected from the identified phase commutation devices and then selected from the phase commutation devices which are not identified if the identified phase commutation devices are not enough; and the power load of the phase commutation devices selected from the adjustment branch lines is made to be equivalent to the adjustment amount value of the main line, a connection phase of the selected phase commutation devices on the branch lines is switched to a target phase, and then the electrical load of the main line and the electrical load of the branch lines meet the balance requirement. The conditions that the load devices with the built-in magnetic movement parts of a user side generate phase commutation vibration and noise can be reduced and avoided, and the load devices can keep operating stably.

Description

technical field [0001] The present invention relates to low-voltage distribution network load balancing technology, in particular to a low-voltage distribution network power load balancing method, and a low-voltage distribution network power load balancing device suitable for realizing the load balancing method. The invention belongs to low-voltage distribution network The field of power distribution technology. 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, and the distribution network is relatively complicated. The size is different and the power consumption time is different. Therefore, the three-phase unbalanced condition of the distribution network is irregular and unpredictable in advance, which leads to the long-term unbalanced three-phase load of the distribution network. The Chinese patent application wit...

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Problems solved by technology

The technical solution disclosed in the above patent application does not consider the load characteristics of the load device it supplies when selecting the commutation device. For example, if the load device has a motor with magnetic moving parts built in, when the phases are switched, the phase of the power supply changes suddenly, resulting in the occurrence of magnetic moving parts. Commutation vibration, noise, load device can not run stably

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