LED and multimode fiber remote signaling signal acquisition device

Abstract

The invention relates to an LED and multimode fiber remote signaling signal acquisition device which comprises a light source transmission circuit, multimode fibers, a light signal on-off device and a light signal receiving circuit. The light source transmission circuit is connected with one end of the corresponding multimode fiber passing through a tail fiber adapter, a tail fiber adapter at the other end of the multimode fiber is mounted on a light through hole on one side of the light signal on-off device, the light signal receiving circuit is connected with one end of another multimode fiber by the aid of a tail fiber adapter, and a tail fiber adapter at the other end of the multimode fiber is mounted on a light through hole on the other side of the light signal on-off device. Operating states of monitored equipment is fed back by the aid of on and off of a light signal circuit, and remote signaling information is transmitted to monitoring equipment. The LED and multimode fiber remote signaling signal acquisition device is simple in structure, reliable in performance and low in power consumption and has the anti-electromagnetic interference capability.

Description

technical field [0001] The invention relates to a remote monitoring device for grid information, in particular to a 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 the circuit breaker, knife switch and other power equipment. For the DC floating charge battery power supply of the substation, the open-in contact is a passive dry contact. In order to improve the reliability of the remote signaling action, the DC bus voltage of +110V and -110V is directly used as the remote signaling power supply, and +110V is the public connection of the remote signaling circuit. If the insulation of the remote signal cable is damaged, water enters the auxiliary contact of the knife switch, and the cable connection construction is accidentally touched, etc., it will cause a DC ground faul...

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 the circuit breaker, knife switch and other power equipment. It mainly has the following shortcomings: First, the DC grounding problem. For the DC floating charge battery power supply of the substation, the input contact is a passive dry contact. In order to improve the reliability of the remote signaling action, the DC bus voltage of +110V and -110V is directly used as the remote signaling power supply, and +110V is the public connection of the remote signaling circuit. If the insulation of the remote signal cable is damaged, water enters the auxiliary contact of the knife switch, and the cable connection construction is accidentally touched, etc., it will lead to the occurrence of a DC ground fault.

If there are two points of DC grounding, it may cause the malfunction of the protection device and cause 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 signal acquisition board usually consumes about 10W, and the full load power will be higher.

Due to the proximity to high-voltage equipment, it is susceptible to electromagnetic interference and sends out false signals

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