Multifunctional clock synchronization device

Abstract

The invention relates to a multifunctional clock synchronization device used for clock synchronization and time keeping of an electronic transformer checking system. Without network, synchronous clock pulses can be provided to remote electronic transformers in real time by using an SOPC (System On Programmable Chip) system based on FPGA (Field Programmable Gate Array) and a peripheral interface conversion circuit so that long-distance connection of optical fibers or cables is avoided; meanwhile, the synchronous clock pulse delay caused by cable length is also avoided; and assurance is offered for reliable field calibration of the electronic transformers. The multifunctional clock synchronization device is characterized in that each electronic transformer in the checked system is connected with the SOPC system based on FPGA and the peripheral interface conversion circuit; and the peripheral interface conversion circuit comprises an external input GPS (Global Positioning System) light, an electric clock signal conversion circuit and forward and reverse light and electric conversion output circuit.

Description

technical field [0001] The invention relates to a multifunctional clock synchronizing device, in particular to a multifunctional clock synchronizing device used in an electronic transformer calibration system, and belongs to the technical fields of photoelectric technology and electrical instrumentation. Background technique [0002] Instruments and equipment such as digital electrical instruments such as electronic transformers and digital watt-hour meters are important equipment for building digital substations. Since digital metering products such as electronic transformers and digital electric energy meters output digital signals, when it needs to be calibrated, the merging unit and electronic transformer calibrator must simultaneously sample the same signal, and then Compare the output digital quantities and get the error, so the synchronous clock device is an important part of digital metering equipment such as electronic transformer calibrator, a multifunctional cloc...

AI Technical Summary

Problems solved by technology

There are mainly two types of existing clock synchronization devices: one is the Chinese invention patent "Clock Synchronization Device for Power System Synchronized Phasor Measurement" (application number: 200810044872.2 application date: 2008-03-03) and the Chinese utility model The patent "GPS Network Clock Synchronization Server" (application number: 200820122892.2, application date: 2008-10-14) discloses that it uses GPS to receive time information, and then synchronizes the time information of each slave device through carrier wave, optical fiber or local area network, etc. The disadvantages of this type of method are: optical fiber or cable is required to connect the two devices, and the cable or optical fiber is affected by the distance, and the synchronous clock will be delayed, resulting in a decrease in system accuracy, difficulty in construction and maintenance, and relatively high investment; As disclosed in the Chinese invention patent "A Clock Source Device Based on GPS Second Pulse and Its Control Method" (Application No.: 201010261347.3 Application Date: 2010-08-24), feedback and other means are used to improve the accuracy of the output signal , is a high-precision application environment, and its construction and maintenance costs are high

At present, there is no synchronous clock device suitable for on-site verification and laboratory verification of electronic transformers in China.

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