A hand-held time synchronization tester

Abstract

A hand-held time synchronization tester is provided. The hand-held time synchronization tester comprises a signal pre processing unit, a protocol receiving inspection unit, a main control unit, a measuring unit and a man-machine interface unit. The hand-held time synchronization tester also comprises a PPS / PPM / PPH pulse signal decoding unit, an IRIG-B (AC / DC) TTL / 422 time signal decoding unit, an RS232 / 485 time frequency signal decoding unit, a timed equipment alarm information decoding unit, and a controllable synchronization signal output and message automatic analysis unit. According to the hand-held time synchronization tester of the invention, integrated measurement technologies are adopted. The hand-held time synchronization tester is integrated with functions such as time and frequency standard and measurement data calculation and comparison as well as test result display, storage and output. With the hand-held time synchronization tester adopted, integrated test items including PPS / PPM / PPH accuracy, second pulse rising edge, serial port data accuracy, pulse signal accuracy, IRIG-series time message accuracy, serial protocol format correctness, PTP and NTP / SNTP synchronization accuracy, serial port time tick message transmitting delay measurement and the like can be completed. The hand-held time synchronization tester of the invention is applicable to field time synchronization tests of intelligent substations.

Description

technical field [0001] The invention relates to a hand-held time synchronization tester, which belongs to the technical field of electric power test equipment. Background technique [0002] The accuracy of power system time synchronization is an important basic condition to ensure power system operation control and fault analysis. Its core function is to provide time synchronization services for transient, dynamic, and steady-state data collection and power grid fault analysis. Smart substation grid technology has become the development trend of the future grid. The basic characteristics of smart substations are primary equipment intelligence, secondary equipment networking, operation management automation, etc. In the smart substation, the collection of the primary state of the power system is completed by distributed equipment, and some secondary equipment (such as protection devices) need data at the same time, so the distributed equipment is required to work synchronous...

AI Technical Summary

Problems solved by technology

[0007] In the existing conventional time synchronization test system, the test interface displays and feeds back each signal waveform diagram, which is not intuitive and requires the tester to be familiar with the structure and principle of each time synchronization signal and time synchronization method, such as NTP / SNTP time synchronization working mode, PPM / PPH / PPS pulse signal, IRIG-B code (AC / DC) time frequency signal waveform and other characteristics, understand the main clock and the input and output interface mode of the timed equipment, including serial interface message RS-232, RS-422 / 485 , IRIG-B code, etc., the timing method of the timing equipment; the requirements for testers are very high

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