Sectional type three-phase load phase-modulation switch cabinet

Abstract

The invention discloses a sectional type three-phase load phase-modulation switch cabinet. The sectional type three-phase load phase-modulation switch cabinet comprises a cabinet body, and a three-phase isolation switch, a first busbar, a second busbar and a third busbar arranged in the cabinet body; the first busbar, the second busbar and the third busbar are in one-to-one correspondent connection with an A phase outlet connector, a B phase outlet connector and a C phase outlet connector of the three-phase isolation switch respectively; the first busbar, the second busbar and the third busbarare distributed at intervals; and a power switch is connected between the first busbar and the second busbar, and between the second busbar and the third busbar separately. Through on and off of thetwo power switches, loads can be divided into one group, or three groups or two groups with a large one and a small one; through A, B and C three-phase control of the three-phase isolation switch, one-phase or two-phase or three-phase power supplying can be realized; and through the three busbars, allocation of the loads in the three phases also can be adjusted flexibly, thereby realizing fine adjustment and bringing convenience to operational and management and the like.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to a segmented three-phase load phase-modulating switchgear. Background technique [0002] Due to the regional differences in the development level of distribution network automation, the three-phase unbalance control in many low-voltage station areas still adopts the solutions of on-site measurement of three-phase current by clamp current meter, power failure phase adjustment, and load transfer; this method requires staff to board the distribution transformer. Working on the low-voltage side of the bench, the operation is difficult, the adjustment period is long, and it will cause unnecessary power outages to users, and the maintenance time of the three-phase load balance after adjustment is not long, which needs to be improved urgently. [0003] In recent years, the three-phase load automatic adjustment technology has been developing day by day. At present, there are three main t...

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Problems solved by technology

[0002] Due to the regional differences in the development level of distribution network automation, the three-phase unbalance control in many low-voltage station areas still adopts the solutions of on-site measurement of three-phase current by clamp current meter, power failure phase adjustment, and load transfer; this method requires staff to board the distribution transformer. Working on the low-voltage side of the bench, the operation is difficult, the adjustment cycle is long, and it will cause unnecessary power outages to users, and the maintenance time of the three-phase load balance after adjustment is not long, which needs to be improved urgently

[0003] In recent years, the three-phase load automatic adjustment technology has been developing day by day. At present, there are three main typical application modes, namely, commutation switch type automatic adjustment device, capacitive automatic adjustment device and power electronic automatic adjustment device, capacitive automatic adjustment device and power electronic automatic adjustment device. The type automatic adjustment device can only adjust the load balance on the outlet side of the transformer, and cannot fundamentally solve the problem of actual load balance distribution. However, the traditional phase-change switch type automatic adjustment device has high construction costs and generally adopts "point "Touch" phase modulation switch, there is a risk that the opening and closing are not in place, and it needs to be improved urgently

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