A three-phase balance scheduling method and device based on commutation switch

Abstract

The invention discloses a three-phase balance dispatching method and device based on phase-change switches. The method is characterized by, calculating a predicted power value of each phase-change switch under a current time period through analysis of historical power data; then, carrying out simulated reality cyclic scheduling based on three-phase power and the predicted power value of each phase-change switch to find out a switching set of the phase-change switches; and finally, sending a phase-change instruction in the switching set to the corresponding phase-change switch. Compared with the prior art, the method does not judge whether the three phases are balanced directly, but judge whether the three phases are balanced by judging whether the switching set of the phase-change switches obtained through simulated reality cyclic scheduling is null.

Description

technical field [0001] The invention relates to a regulation and dispatching algorithm when the three-phase unbalance of the low-voltage power grid is unbalanced. Background technique [0002] Patent document CN 205882721U discloses a three-phase balance control system for a power grid based on a commutation switch. The system realizes the three-phase balance control of the low-voltage power grid through the commutation switching control of the commutation switch installed on the single-phase user side, so that the load of the three-phase alternating current can be kept balanced. The system discloses the networking structure of the equipment, but does not disclose its specific commutation control in detail. Generally speaking, the commutation switching control usually consists of two steps: the first step is to judge whether the three phases are balanced, and the second step is to perform switching scheduling when the three phases are judged to be unbalanced. Both the pate...

AI Technical Summary

Problems solved by technology

[0003] The first is the standard of whether the three phases are balanced is difficult to grasp

Whether the three phases are balanced is judged by whether the balance degree exceeds the threshold, and the threshold is difficult to set within a reasonable range

Thresholds set too large or too small are problematic

[0004] The second is that it is difficult to coordinate the judgment of whether the three phases are balanced and the subsequent switching scheduling

[0005] The third is to judge based on the power or current at the current moment, but this kind of real-time data is not representative. Although the moment after the scheduling switch is three-phase balanced, it will immediately become a three-phase unbalanced state at the next moment

The three-phase equilibrium state cannot be kept relatively stable, and frequent phase changes are required

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