Analog quantity and digital quantity hybrid acquisition type mutual inductor interference source testing system and method

Abstract

The invention discloses an analog quantity and digital quantity hybrid acquisition type mutual inductor interference source testing system which comprises an analog quantity input interface unit, a front-end acquisition device, a main control central processing unit (CPU) module and an upper computer, wherein the front-end acquisition device comprises an internal multi-channel partial pressure module, a front sampling module and a power module; the front sampling module is connected to the power module; the main control CPU module comprises a field programmable gate array (FPGA), a microprocessor and a fiber interface unit; the analog quantity input interface unit, the internal multi-channel partial pressure module, the front sampling module and the FPGA are sequentially connected; the FPGA, the microprocessor and the upper computer are sequentially connected; the fiber interface unit is connected to the FPGA. The testing system disclosed by the invention, which is a multi-sampling system, can simultaneously acquire an original analog signal and a grounding distribution parameter of an electronic mutual inductor as w ell as output digital quantity signals of a collector and a merging unit; sampling value data sent from the merging unit are acquired through the real-time Ethernet; final data are compared with original data to eliminate the influence of capacitive current in the system.

Description

technical field [0001] The invention belongs to the field of detection of electronic transformers in intelligent substations in electric power systems, and relates to an on-site anti-interference testing system for electronic transformers used in GIS of intelligent substations. Background technique [0002] At present, the power grid construction is mainly based on smart substations or digital substations. The main technical feature of smart substations or digital substations is the intelligence of primary equipment, so electronic transformers will definitely be the main smart primary equipment for future smart substation construction. However, when electronic transformers are commonly used in GIS at present, strong interference signals are generated at the signal terminal and power supply terminal of electronic transformers due to VFTO during the process of pulling and closing the switch, resulting in the collector not working normally, or generating Abnormal data will affe...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The present invention is to solve the test requirements for the anti-interference ability of GIS electronic transformers in intelligent substations and digital substations, and to develop a GIS based on real-time Ethernet for the current technical status of electronic transformers in existing GIS. On-site anti-interference test system for internal electronic transformers to meet the requirements of power system users for the anti-interference ability test of electronic transformers in smart substation GIS. The interference source signal received by the transformer and its influence on the characteristics of the electronic transformer are used to improve the reliability of the electronic transformer when applied in GIS

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