Optical path switching interface mechanism for fiber channel test of relay protection device

Abstract

The invention relates to an optical path switching interface mechanism for a fiber channel test of a relay protection device. The power end of a control module is connected with a control power supply; the input end of the control module is connected with a button switching switch, and the output end is connected with a drive module; an optical path switching module comprises at least two photomagnetic switches and more than four optical fiber transmitting interfaces and optical fiber receiving interfaces; the output end of the drive module is respectively connected with the control ends of two photomagnetic switches; two input ends of the first photomagnetic switch K1 are respectively connected with the first optical fiber transmitting interface TX1 and the third optical fiber transmitting interface TX3, and two output ends are respectively connected with the second optical fiber transmitting interface TX2 and the fourth optical fiber transmitting interface TX4; two input ends of the second photomagnetic switch K2 are respectively connected with the second optical fiber receiving interface RX2 and the third optical fiber receiving interface RX3, and two output ends are respectively connected with the first optical fiber receiving interface RX1 and the fourth optical fiber receiving interface RX4. The invention is convenient to complete the protection test and the optical fiber channel test work through the optical path switching of multiple interfaces.

Description

Technical field [0001] The invention relates to a switching optical path interface mechanism for a fiber channel test of a relay protection device, and belongs to the technical field of relay protection devices. Background technique [0002] The secondary equipment in the power system is used to monitor, control, regulate, and protect the work of the primary equipment, as well as to provide operation and maintenance personnel with operating conditions or low-voltage electrical equipment required for production command signals. The relay protection mechanism is important The secondary circuit equipment of the power system. With the gradual promotion of smart substations and smart grids, their traditional cable communication methods have been replaced by optical fiber digital communication methods. The protection of optical fiber channels of 220kV and above requires frequent installation and removal of optical cable connectors from the relay protection device during the protection...

AI Technical Summary

Problems solved by technology

The protection of 220kV and above fiber optic channels requires frequent installation and removal of the optical cable connector from the relay protection device during the protection verification test and measurement of optical power, so it is easy to cause the wear of the optical cable interface and the increase in the attenuation of the optical interface contact surface , thereby affecting the accuracy of the relay protection device calibration, and even damage to the optical cable interface will bring hidden dangers to the safe and reliable operation of the main protection of the power line

[0003] At present, the optical fiber protection devices at home and abroad do not have a standard and perfect verification process for the verification of the protection device in the field, especially the verification of the fiber channel.

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