Power load balancing system for power distribution network

Abstract

The invention discloses a power load balancing system for a power distribution network. The power load balancing system comprises a control master station and a plurality of commutation devices for switching access phases; when the power load of the power distribution network is unbalanced, the control master station is used for determining a phase switching pair and a corresponding adjustment quantity value, making the commutation devices which do not provide load devices with built-in magnetic movement parts with electricity in a source phase in the phase switching pair, selecting the marked commutation devices requiring phase switching in the source phase, selecting unmarked commutation devices requiring phase switching in the source phase if the marked commutation devices are not enough, wherein the sum of the power load of the selected commutation devices is equivalent to the adjustment quantity value, so that the power load of the power distribution network is balanced; and the control master station controls the selected commutation devices to switch the access phases into a target phase in the phase switching pair. Reduction and avoidance of commutation vibration and noise generated by the load devices, with the built-in magnetic movement part, of clients are facilitated, stable operation is kept, and harmonic interference with the power distribution network is reduced.

Description

technical field [0001] The invention relates to a three-phase load balancing technology of a distribution network, in particular to a power load balancing system of a distribution network suitable for a low-voltage distribution network. The invention belongs to the technical field of power distribution of a low-voltage distribution network. 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 difference is different from the power consumption time. Therefore, the three-phase unbalance of the distribution network is irregular and unpredictable in advance, which leads to the long-term unbalance of the three-phase load of the distribution network, which causes many faults. The single-phase load of the transformer is too large during the peak period of electricity, ...

AI Technical Summary

Problems solved by technology

The balancing system disclosed in the above-mentioned Chinese patent application keeps the three-phase load balanced operation of the low-voltage distribution network by switching the access phases of the commutation devices in real time, but it does not consider the characteristics of the load devices it supplies when selecting the commutation devices. The phase switching operation often affects the stable operation of load devices with built-in magnetic moving parts at the user end, such as washing machines, air conditioners and other motors with built-in magnetic moving parts. Violent commutation vibration, noise, and even damage to magnetic moving parts

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