Laser-single mode fiber remote signaling signal sampling device

Abstract

A laser and single-mode optical fibre telesignalization signal acquisition device, including a laser sending circuit (1), a single-mode optical fibre (8), an optical signal switch (4) and a laser signal receiving circuit (2). The laser sending circuit (1) is connected to one end of the single-mode optical fibre (8), and a pigtail adaptor (9) at the other end of the single-mode optical fibre (8) is correspondingly installed on an optical through-via at one side of the optical signal switch (4). The laser signal receiving circuit (2) is connected to one end of a single-mode optical fibre (10), and a pigtail adaptor (11) at the other end of the single-mode optical fibre (10) is correspondingly installed on an optical through-via at the other side of the optical signal switch (4). The device feeds back the operating status of the monitored apparatus using the ON / OFF of the optical signal circuit and transmits the telesignalization information to the monitoring apparatus, with a simple structure, reliable performance, low power consumption, and resistance to electromagnetic interference.

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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