Laser-single mode fiber remote signaling signal sampling device

Abstract

The invention relates to a laser-single mode fiber remote signaling signal sampling device, consisting of a laser sending circuit, a signal mode fiber, an optical signal on-off device and a laser signal receiving circuit, wherein the laser sending circuit is connected with one end of the signal mode fiber, a pigtail adapter at one end of the signal mode fiber is correspondingly mounted on a light through hole on one side of the optical signal on-off device, the laser signal receiving circuit is connected with one end of the signal mode fiber, and a pigtail adapter at the other end of the signal mode fiber is correspondingly mounted on a light through hole on the other side of the optical signal on-off device. According to the invention, through on / off of an optical signal loop, the operation state of monitored equipment is fed back and remote signaling information is transmitted to monitoring equipment. The laser-single mode fiber remote signaling signal sampling device is simple in structure, reliable in performance, low in power consumption and strong in electromagnetic interference resistance and can meet the requirement of live line work.

Description

technical field [0001] The invention relates to a remote monitoring device for grid information, in particular to a laser and single-mode optical fiber remote signaling signal acquisition device. Background technique [0002] The remote control and remote signaling signal acquisition device of the existing power grid mainly relies on the on-off of the DC circuit to reflect the opening and closing status of power equipment such as circuit breakers and knife switches. It mainly has the following deficiencies: First, the DC grounding problem. The DC floating battery power supply of the substation is used, that is, the DC bus voltage of +110V and -110V is directly used as the remote signaling power supply, and +110V is the common terminal of the remote signaling circuit. , Cable wiring construction accidents, etc., a DC grounding fault will occur, resulting in a malfunction of the protection device and causing a large-scale power outage. Second, the SOE resolution of the signal...

AI Technical Summary

Problems solved by technology

[0002] The remote control and remote signaling signal acquisition device of the existing power grid mainly relies on the on-off of the DC circuit to reflect the opening and closing status of power equipment such as circuit breakers and knife switches. It mainly has the following deficiencies: First, the DC grounding problem. The DC floating battery power supply of the substation is used, that is, the DC bus voltage of +110V and -110V is directly used as the remote signaling power supply, and +110V is the common terminal of the remote signaling circuit. , cable wiring construction error, etc., a DC grounding fault will occur, resulting in a malfunction of the protection device, resulting in a large-scale power outage

Second, the SOE resolution of the signal at the same point is low. Since a large number of jitter signals will be generated during the operation of the auxiliary contact of the traditional contact signal, the remote signal acquisition circuit must adopt jitter filtering processing on hardware and software, which makes it difficult to realize the same point. 2ms SOE resolution requirement

The third is that the power consumption is large, and there is an electromagnetic interference problem. A 32-channel DC remote signaling acquisition board usually consumes about 10W, and the full load power will be higher. Because it is close to high-voltage equipment, it is vulnerable to electromagnetic interference and sends out wrong signals.

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