CN204965668U - Cable pit conflagration on -line monitoring device of transformer substation - Google Patents

Abstract

An on-line monitoring device for a cable trench fire in a substation, which is composed of a cable trench fire on-line monitoring substation, a communication network, and a main station. Temperature sensor, smoke sensor, microprocessor, power module, communication module, etc. constitute the monitoring sub-station; the signal acquisition module is responsible for receiving and monitoring the monitoring data signals transmitted by various terminal sensors; the communication module is responsible for collecting the collected terminal signals and terminal faults The signal is transmitted to the main station; the main station quickly locates the location of the fire or final fault terminal by judging whether the information sent back by each sub-station exceeds the preset alarm threshold, and initiates corresponding early warning and auxiliary decision-making. The utility model is suitable for on-line monitoring of cable trench fires in unattended substations.

Description

An on-line fire monitoring device for cable trenches in substations

technical field

The utility model relates to an on-line fire monitoring device for cable trenches in substations, which belongs to the technical field of electric power system automation.

Background technique

The transmission and distribution lines in the substation are generally laid through cable trenches. In order to save land and construction costs, one or several cable trenches are generally shared. Cables are buried underground through cable trenches. Once a fire occurs, it is difficult to find, especially at present, substations are generally unattended. Once a fire occurs, it often takes a long time to be discovered by fire alarms or other methods. At this time, there are many power cables in the cable trench. It has been damaged, leading to large-scale power outages and seriously affecting the reliability of power supply of power supply companies.

Contents of the invention

The purpose of this utility model is, in order to realize the real-time monitoring of the fire in the cable trench of the substation, so as to deal with the fire in time, avoid the large-scale blackout event caused by the burning of many power cables, and provide a method based on the Internet of Things technology to monitor the fire situation of the cable trench in the substation. Devices for real-time monitoring.

The technical scheme of the utility model is that an on-line monitoring device for a cable trench fire in a substation of the utility model includes a monitoring terminal and a cable trench fire online monitoring main station; the monitoring host is connected to the monitoring terminal through an internet.

The monitoring terminal in the device includes a temperature sensor, a smoke sensor, a microprocessor, a power supply module and a communication module. The temperature sensor and the smoke sensor are respectively connected to the input end of the microprocessor through the A/D converter, the output end of the microprocessor is connected to the communication module, and the power supply module is connected to the microprocessor and supplies power to it.

The temperature sensor and smoke sensor are installed in the cable trench, and the installation quantity and specific installation location are determined according to the actual needs, and the location environment can be monitored in real time; the signal collected by the sensor is collected by the microprocessor and processed, and the communication module adopts the Internet of Things ad hoc network The communication method can send the signal processed by the microprocessor and the terminal heartbeat information to the cable trench fire online monitoring master station. The power supply module provides power for the monitoring terminal. It adopts the method of CT and lithium battery to get power. Under normal circumstances, it gets power through the CT buckled on the power cable. If the power cable is out of service for maintenance, it depends on the lithium battery to maintain work.

The fire online monitoring master station in the device includes an industrial control host, a signal acquisition module and a communication module. The industrial control host is the carrier of the fire online monitoring master station. The signal acquisition module is responsible for receiving the monitoring signals transmitted by the monitoring terminal. The fire alarm signal and terminal fault signal are transmitted to the centralized control station through the substation telecontrol device or the substation intelligent auxiliary system to realize remote online monitoring of the substation cable trench fire and the operation status of the substation cable trench fire online monitoring device.

The beneficial effect of the utility model compared with the prior art is that the utility model adopts the self-organizing network technology of the Internet of Things, avoiding the work of laying communication lines such as 485 or optical fiber in the substation, and at the same time, the newly added monitoring terminal can form a network independently, Communication debugging work is avoided, and the monitoring terminal has a self-test function, which can send heartbeat information regularly to ensure that the terminal is in a normal working state.

The utility model is suitable for on-line monitoring of cable trench fires in unattended substations.

Description of drawings

Fig. 1 is a structural schematic diagram of an on-line fire monitoring device for a substation cable trench according to the present invention;

Fig. 2 is a schematic diagram showing the comparison of the average time-consuming processing time for a cable trench fire in a traditional substation and the average time-consuming processing by the power grid company after the device of the utility model sends out an alarm signal.

In the figure, A1 is the discovery time of the traditional method; B1 is the discovery time of the online monitoring method; A2 is the arrival time of the traditional method; B2 is the arrival time of the online monitoring method; A3 is the recovery time of the traditional method; B3 is the recovery time of the online monitoring method time.

detailed description

The specific embodiment of the utility model is shown in Fig. 1 as an on-line monitoring device for a cable trench fire in a substation. The monitoring terminal in the device of this embodiment is composed of a temperature sensor, a smoke sensor, a microprocessor, a power module, and a communication module.

The temperature sensor and smoke sensor are installed in the cable trench, and the installation quantity and specific installation location are determined according to the actual needs, and the location environment can be monitored in real time; the signal collected by the sensor is collected by the microprocessor and processed, and the communication module adopts the Internet of Things ad hoc network The communication method can send the signal processed by the microprocessor and the terminal heartbeat information to the cable trench fire online monitoring master station. The power supply module provides power for the monitoring terminal. It adopts the method of CT and lithium battery to get power. Under normal circumstances, it gets power through the CT buckled on the power cable. If the power cable is out of service for maintenance, it depends on the lithium battery to maintain work.

The main station of the device in this embodiment includes an industrial control host, a signal acquisition module and a communication module. The industrial control host analyzes the monitoring information of the substation cable trench operation environment sent back by the monitoring terminal in real time, and finds that the information sent back by a certain terminal exceeds the alarm preset by the main station. After the threshold is reached, the master station judges that a fire has occurred in the cable trench and determines the location of the fire, and then sends a fire at a certain position in the cable trench of the substation to the centralized control station of the substation through the telecontrol system in a pre-set message format, and the centralized control station operates and monitors After receiving the alarm signal, the personnel notified the substation emergency repair personnel to go to the scene to deal with the fire.

Claims (3)

1. A substation cable trench fire on-line monitoring device is characterized in that the device includes a monitoring terminal and a cable trench fire on-line monitoring master station; the monitoring host is connected with the monitoring terminal through an ad hoc Internet network; The monitoring terminal in the described device comprises temperature sensor, smoke sensor, microprocessor, power supply module, communication module; The communication module is connected to the terminal, and the power supply module is connected to the microprocessor and supplies power to it. 2. The on-line monitoring device for a cable trench fire in a substation according to claim 1, wherein the monitoring master station includes an industrial control host, a signal acquisition module and a communication module; the industrial control host is the carrier of the fire online monitoring master station, The signal acquisition module is responsible for receiving the monitoring signal transmitted back from the monitoring terminal, and the communication module is responsible for transmitting the fire alarm signal and terminal fault signal to the centralized control station through the substation remote control device or the substation intelligent auxiliary system. 3 . The on-line fire monitoring device for a cable trench in a substation according to claim 1 , wherein the temperature sensor and the smoke sensor are installed in the cable trench to monitor the location environment in real time. 4 .