Intelligent and conventional transformer substation optical fiber longitudinal difference protection channel joint debugging test method

Abstract

The invention discloses an intelligent and conventional transformer substation optical fiber longitudinal difference protection channel joint debugging test method which is characterized in that the intelligent transformer substation adopts a light inter-range instrumentation group (IRIG)-B code synchronous time tick mode, and the conventional transformer substation adopts a global positioning system (GPS) time tick mode, so that a plurality of points can be subjected to synchronous acquisition and trigger test; during test, relay protection testers on two sides are respectively connected to a GPS clock and an IRIG-B code clock; and time information comprising date, hour, minute, second and the like is sent at the frequency of one time per second. The intelligent and conventional transformer substation optical fiber longitudinal difference protection channel joint debugging test method has the advantages that the intelligent transformer substation adopts the light IRIG-B code synchronous time tick mode, and the conventional transformer substation adopts the GPS time tick mode, so that protection synchronous sampling and synchronous sampling of the testers on two sides are completed by using the two clocks, and a plurality of points can be subjected to synchronous acquisition and trigger test; therefore, the test on dual-end optical fiber current longitudinal difference protection is realized; and the test method is simple, and the data is accurate.

Description

technical field [0001] The invention relates to the technical field of relay protection test methods, in particular to an intelligent and conventional substation optical fiber differential protection channel joint debugging test method. Background technique [0002] At present, the main protection of 220kV lines running in the power grid is mostly optical fiber current differential protection, which uses fiber optic channels to transmit the waveform of the current on this side or the signal representing the current amplitude and phase to the opposite side. Real-time synchronous comparison of value and phase, according to the result of comparison to distinguish whether it is an internal fault or an external fault. The joint debugging test of the longitudinal channel is the key to ensure the correctness of the longitudinal differential protection action logic. [0003] With the construction of the smart grid, more and more intelligent substations use electronic optical curren...

AI Technical Summary

Problems solved by technology

When conducting joint commissioning tests of intelligent substations and conventional substation channels, using traditional test methods, the data is often not recognized by the protection of intelligent substations, resulting in incorrect results

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