Transformer interference source testing system and method for mixed acquisition of analog and digital quantities

Abstract

The invention discloses a transformer interference source test system for mixed acquisition of analog and digital quantities, which includes an analog input interface unit, a front-end acquisition device, a main control CPU module and a host computer; the front-end acquisition device includes a built-in multi-channel voltage divider module , pre-sampling module and power module, the pre-sampling module is connected to the power module; the main control CPU module includes FPGA, microprocessor and optical fiber interface unit; analog input interface unit, built-in multi-channel voltage divider module, pre-sampling The module and the FPGA are connected in sequence, the FPGA, the microprocessor and the host computer are connected in sequence, and the optical fiber interface unit is connected to the FPGA. The present invention is a multi-sampling system, which collects the original analog signal of the electronic transformer and the distribution parameters to the ground and the output digital signal of the collector and the merging unit at the same time, adopts real-time Ethernet to collect the sampling value data sent by the merging unit, and converts the final Data is compared with raw data to remove the effect of capacitive currents in the system.

Description

technical field [0001] The invention belongs to the field of detection of electronic transformers in intelligent substations of power systems, and relates to an on-site anti-jamming testing system for electronic transformers used in GIS of intelligent transformer 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. Therefore, electronic transformers will definitely be the main intelligent primary equipment for future smart substation construction. But at present, when electronic transformers are widely used in GIS, due to VFTO in the process of closing the switch, strong interference signals are generated at the signal end and power end of the electronic transformers, so that the collector cannot work normally, or generate Abnormal data will affect the overall safe operation...

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

Images