Device and method for testing time deviation and punctuality precision of relay protection device

Abstract

The invention discloses a device for testing time deviation and punctuality precision of a relay protection device. The device for testing time deviation and punctuality precision comprises a clock source, an acquisition unit and a master station system. The invention further discloses a method for testing time deviation and punctuality precision of the relay protection device. The method comprises steps of enabling the acquisition unit to obtain standard time from the master station system; when the acquisition unit receives the first byte of the action report message, recording the protection action time T1 according to the standard time; analyzing the protection action time T0 recorded by the protection device based on the time of the protection device; calculating a time deviation deltaT; calculating a time deviation range and punctuality precision. According to the invention, the time deviation and punctuality precision test of the relay protection device can be automatically carried out, a technician does not need to go to a substation site for inspection, the manpower is greatly reduced, the test time is saved, and the error of manual inspection is avoided.

Description

technical field [0001] The invention belongs to the field of relay protection device testing, in particular to a test device for time deviation and punctuality accuracy of a relay protection device, and also relates to a test method for time deviation and punctuality accuracy of a relay protection device. Background technique [0002] The relay protection device is an important secondary equipment to ensure the safe and stable operation of the substation. When the power grid fails, the relay protection device will act immediately and quickly cut off the faulty line, so as not to expand the fault range of the power grid and ensure the stable operation of the power grid. After the relay protection device operates, it will print out the action report, which includes the action time of the relay protection, such as figure 1 As shown, the relay protection action time is an important reference index for power grid fault analysis. However, in the substations currently in operation...

AI Technical Summary

Problems solved by technology

However, in the substations currently in operation, especially the old substations that have not been transformed, the relay protection devices lack time synchronization devices, causing the time of the relay protection devices in these substations to be inaccurate, and the time of each relay protection device is out of sync. After the protection action The output protection action time is also different. The action time of different protection devices for the same power grid fault will be different, which will cause great troubles to analyze the power grid fault, resulting in failure to eliminate the power grid fault in time and unable to restore power to users. loss to the national economy

[0003] In order to eliminate the problem of time inconsistency of relay protection devices, the power supply company needs to regularly send technicians to the substation site for inspection. Most of the substations are in the wild or in the suburbs, and the transportation is inconvenient. It takes a lot of time and energy for the technicians to go to the substation site

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