Transformer station current synchronization acquisition device based on passive electronic mutual inductor

Abstract

The invention provides a transformer station current synchronization acquisition device based on a passive electronic mutual inductor; the transformer station current synchronization acquisition device comprises a passive electronic current transformer sensitive ring, a polarization maintaining fiber, a passive electronic current transformer electrical unit, a merging unit and a fault wave recording and network recording analysis device; the sensitive ring is sleeved outside a tested transformer station GIS outgoing line sleeve pipe; the electrical unit sends an optical signal to the sensitivering through the polarization maintaining fiber; the optical signal is reflected by a sensitive ring inner reflector, and returned to the electrical unit through the polarization maintaining fiber; the electrical unit carries out photoelectric conversion and demodulation for the electro-optical light with the changed polarization angle, and outputs the current data to the merging unit; the merging unit marks a synchronized clock marker on the gathered current data, thus forming a current message, and sending the message to the fault wave recording and network recording analysis device; the fault wave recording and network recording analysis device parses the received current message so as to obtain the transformer station corresponding GIS outgoing line current. The transformer station current synchronization acquisition device is simple and reliable, strong in practical values, and accurate in data.

Description

technical field [0001] The invention relates to a substation current acquisition device based on a passive electronic transformer, which belongs to the technical field of electric power and electronic transmission. Background technique [0002] Since the second industrial revolution, human society entered the electrical age, electric energy has been widely used, which has promoted the rapid development of human social civilization. At present, the electrical system not only profoundly affects all aspects of social material production, but also penetrates into all aspects of human daily life more and more widely. Its development level and technical level have become one of the important symbols of the economic and technological development level of various countries. Electrical systems have become the basis for the existence and development of human society. Traditional electromagnetic current transformers have been used for a long time in the field of conventional power tra...

AI Technical Summary

Problems solved by technology

Traditional electromagnetic current transformers have been used for a long time in the field of conventional power transmission and transformation, and there are disadvantages such as magnetic saturation, complex insulation, explosion, secondary open circuit hazards, large footprint, inconvenient installation, and complicated wiring.

With the increase of the voltage level of the power grid, the existing electromagnetic transformers can no longer meet the needs of smart substations, and the traditional electromagnetic current transformers cannot perform synchronous data acquisition and transmission, and can only be used as circuit protection devices in applications. Electronic current transformers are based on Faraday's magneto-optic effect and Ampere's loop theorem, and adopt closed-loop control and interferometric reciprocity optical circuit technology, which has outstanding technical advantages

[0003] However, due to the relatively large scale of the power grid, a single passive electronic current transformer cannot simultaneously measure power grid data such as voltage and current of the entire network, nor can it be used for performance comparison tests between different transformers

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