Three-phase phase checking device applied to power distribution network 10 kV switch cabinets and phase checking method

Abstract

The invention provides a three-phase phase checking device applied to power distribution network 10 kV switch cabinets and a phase checking method. The phase checking device comprises two three-phase sampling modules respectively corresponding to two ring network cabinets. The two three-phase sampling modules are respectively connected to live-line display device interfaces of the A ring network cabinet and the B ring network cabinet through connecting wire plugs of themselves. The device is provided with an analog-to-digital conversion module, and voltage analog signals collected by the three-phase sampling modules are converted into digital signals through the analog-to-digital conversion module. A central processing and calculation module calculates the digital signals so as to judge whether the three-phase voltages are identical in phase. The central processing and calculation module is connected with a display and indication module which is capable of indicating that the corresponding three-phase voltages of the two switch cabinets are consistent in phase. The device is light in weight, small in size, portable, simple and convenient to use and operate, safe and high in efficiency, and the phase checking efficiency and the phase checking accuracy of an operator are substantially improved.

Description

technical field [0001] The invention relates to a three-phase verification device and a phase verification method for a 10kV switch cabinet applied to a distribution network, and belongs to the technical field of distribution networks. Background technique [0002] With the development of social economy, there are more and more new residential areas and factories, and the requirements for cleanliness and beautification of the city are also constantly improving. The urban power cable network plays a pivotal role. At present, more than 90% of the general urban power cable network uses ring The network cabinet and the ring network cabinet all adopt the "hand in hand" wiring method. This wiring method requires that the three-phase voltage phases of the "hand in hand" ring network cabinets forming a ring are consistent. It may also cause heavy losses to users, or even cause security incidents. [0003] The traditional single-phase phase nuclear device mainly judges whether the p...

AI Technical Summary

Problems solved by technology

[0004] For a long time, power operation staff mainly use ordinary single-phase phase checkers to check phases of ring main units, and only one phase can be checked at a time. Each phase needs to be checked with the three phases on the opposite side, and a total of 9 checks are required. Sometimes it even needs to be checked repeatedly, it takes a long time to think about it, there are many steps, the operation is inconvenient, and it is easy to make mistakes

[0005] At the same time, when the manufacturers and models of new switchgears in the same switch station are different, due to the different voltage amplitudes at the live display devices of the switch cabinets of different manufacturers, the ordinary single-phase phase verification device cannot perform accurate phase verification, and it is necessary to go to the opposite side switch station Carrying out indirect nuclear phase consumes a lot of manpower and material resources

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