CN207850442U - Substation monitors system - Google Patents

Abstract

The utility model relates to power system monitoring technology, which discloses a substation environment monitoring system, which uses Zigbee technology to monitor substation environment parameters in real time, improves the reliability, effectiveness and accuracy of environment monitoring, and saves financial and human resources. The system includes: a power failure protection device, an alarm terminal, a monitoring terminal, a Zigbee coordinator, and a plurality of Zigbee terminal nodes and a plurality of sensor units deployed in different areas of the substation; the Zigbee coordinator and the plurality of Zigbee terminal nodes A star topology network is formed between them; the sensor unit is connected to the Zigbee terminal nodes in one-to-one correspondence, and the Zigbee coordinator is connected to the monitoring terminal; the alarm terminal and the power-off protection device are all connected to the monitoring terminal; the sensor unit Including sensors for monitoring the working status of the substation and sensors for monitoring the environment of the substation.

Description

Substation Environmental Monitoring System

technical field

The utility model relates to a power system monitoring technology, in particular to a substation environment monitoring system.

Background technique

At present, the environmental monitoring systems of most substations mostly use optical fiber for data transmission. The functions of each system are independent, and there are defects such as cumbersome wiring, difficult maintenance, waste of manpower, etc., and they do not have the online monitoring function of smart grid.

With the continuous development of electronic technology, single-chip microcomputer technology and sensor technology, the concept of intelligence and the Internet of Things is applied in environmental monitoring. If ZigBee wireless communication is used to complete real-time and efficient data collection and monitoring of the environment, it will replace traditional manual monitoring. This method can improve the reliability, effectiveness and accuracy of environmental monitoring and save financial and human resources.

Utility model content

The technical problem to be solved by the utility model is to propose a substation environmental monitoring system, which uses Zigbee technology to monitor substation environmental parameters in real time, improves the reliability, effectiveness and accuracy of environmental monitoring, and saves financial and human resources.

The technical solution adopted by the utility model to solve the problems of the technologies described above is:

Substation environmental monitoring system, including: power failure protection device, alarm terminal, monitoring terminal, Zigbee coordinator and a plurality of Zigbee terminal nodes and a plurality of sensor units deployed in different areas of the substation; the Zigbee coordinator and the plurality of Zigbee A star topology network is formed between the terminal nodes; the sensor unit is connected to the Zigbee terminal nodes in one-to-one correspondence, and the Zigbee coordinator is connected to the monitoring terminal; the alarm terminal and the power-off protection device are all connected to the monitoring terminal; The sensor unit includes a sensor for monitoring the working state of the substation and a sensor for monitoring the environment of the substation.

As a further optimization, the power-off protection device includes a PLC programmable controller and a relay, the input end of the relay is connected to the PLC programmable controller, and the output end of the relay is connected to the power line in the substation.

As a further optimization, the sensors for monitoring the working state of the substation include voltage sensors and current sensors connected to the substation through cables.

As a further optimization, the sensors for monitoring the substation environment include: temperature and humidity sensors, open flame detectors, smoke sensors and harmful gas concentration sensors.

As a further optimization, the temperature and humidity sensor adopts DHT11 sensor.

As a further optimization, the harmful gas concentration sensor is a SF6 concentration detection sensor.

As a further optimization, the alarm terminal includes an audible and visual alarm.

As a further optimization, the monitoring system also includes an exhaust fan arranged on the wall of the substation, and the exhaust fan is connected with the monitoring terminal.

As a further optimization, the monitoring terminal is a host computer and/or a mobile terminal.

As a further optimization, the monitoring system also includes a serial port display circuit connected to the Zigbee terminal nodes in a one-to-one correspondence.

The beneficial effects of the utility model are: adopt ZigBee technology to monitor the temperature and humidity, harmful gas concentration, fire information and other substation environmental parameters in real time, and display the monitoring results and alarm information on the upper computer, when the value monitored by the system exceeds the set threshold , the system sets an alarm reminder. Therefore, the solution of the utility model can improve the reliability, effectiveness and accuracy of environmental monitoring, and save financial and human resources.

Description of drawings

Fig. 1 is a schematic structural diagram of a substation environment monitoring system in an embodiment of the present invention.

Detailed ways

The utility model aims to propose a transformer substation environmental monitoring system, which uses Zigbee technology to monitor the environmental parameters of the transformer substation in real time, improves the reliability, effectiveness and accuracy of environmental monitoring, and saves financial and human resources.

The utility model realizes the real-time environmental monitoring system based on the Zigbee protocol networking technology, changes the original wired monitoring traditional mode, collects environmental data by designing multiple sensor nodes, accesses the wireless network, and transmits the data to the coordinator node to coordinate The server node further processes the data and displays it in real time on the display module, and at the same time displays it through the host computer or mobile App. The on-duty personnel can monitor the environmental parameters in the substation in real time with the host computer, and take timely measures according to the monitoring parameters to minimize the loss.

As shown in Figure 1, the substation environmental monitoring system in this embodiment includes a power-off protection device, an alarm terminal, a monitoring terminal, a Zigbee coordinator, and multiple Zigbee terminal nodes and multiple sensor units deployed in different areas of the substation; Form a star topology network between the Zigbee coordinator and the plurality of Zigbee terminal nodes; the sensor unit is connected to the Zigbee terminal nodes in one-to-one correspondence, and the Zigbee coordinator is connected to the monitoring terminal; the alarm terminal and the disconnection The electrical protection devices are all connected to the monitoring terminal; the sensor unit includes a sensor for monitoring the working state of the substation and a sensor for monitoring the environment of the substation.

In a specific implementation, the power-off protection device includes a PLC programmable controller and a relay, the input end of the relay is connected to the PLC programmable controller, and the output end of the relay is connected to the power line in the substation. By setting the above-mentioned power-off protection device, when the monitoring terminal judges that the power line of the substation is in dangerous conditions such as overvoltage and overcurrent according to the voltage and current data obtained by the sensor unit, the corresponding line can be cut off to prevent the occurrence of danger.

The sensors for monitoring the working state of the substation include voltage sensors and current sensors connected to the substation through cables. By setting the voltage sensor and the current sensor, the voltage parameters and current parameters of the power line in the current substation can be effectively monitored.

The sensors for monitoring the substation environment include: temperature and humidity sensors, open flame detectors, smoke sensors and harmful gas concentration sensors. By setting the temperature and humidity sensor, the temperature and humidity data of the substation environment can be detected. By setting the open flame detector, it can be detected whether there is an open flame in the substation environment. By setting the smoke sensor, the smoke concentration in the substation environment can be detected. By setting the harmful gas concentration sensor, the substation can be detected. The concentration of harmful gases in the environment.

The temperature and humidity sensor adopts DHT11 sensor. The DHT11 sensor has the advantages of high detection sensitivity and high accuracy, and can collect temperature and humidity data at the same time.

The harmful gas concentration sensor is a SF6 concentration detection sensor. SF6 is a gas with excellent electrical insulation and arc extinguishing properties. It is often used in the insulation protection of electrical equipment. It is an ultra-high voltage insulating medium material. Pure SF6 is not toxic, and may produce other toxic gases under the action of high-temperature arcs. Impurities, and because of their high density, are easy to deposit in low-lying places, such as cable trenches, which will pose a threat to the safety of construction personnel and cause personnel to suffocate and die. Therefore, it is particularly necessary to monitor the concentration of SF6.

The alarm terminal includes an audible and visual alarm. The sound and light alarm can be used when the monitoring terminal judges that the threshold is exceeded according to the data detected by the sensor, so as to remind the staff to deal with it in time.

The monitoring system also includes an exhaust fan arranged on the wall of the substation, and the exhaust fan is connected with the monitoring terminal. By setting the exhaust fan, when the SF6 concentration exceeds the standard, the exhaust ventilation can be carried out under the control of the monitoring terminal, thereby reducing the SF6 concentration.

The monitoring terminal is a host computer and/or a mobile terminal. The host computer is used as the monitoring terminal, which directly communicates with the Zigbee coordinator through the serial port, and the mobile terminal is used as the monitoring terminal to realize the communication between the mobile terminal and the Zigbee tuner through protocol conversion.

The monitoring system also includes a serial port display circuit connected to the Zigbee terminal nodes in one-to-one correspondence. By setting the serial port display circuit at the Zigbee terminal node to display the various parameters collected by the terminal node, it is beneficial for the staff to quickly locate the node area where the problem occurs when the alarm terminal alarms, so as to eliminate the problem in time.

Based on the above system, the scheme of the present utility model can collect the working state parameters of the substation (including voltage, current, etc.) The parameter is compared with the preset threshold, and when the preset threshold is exceeded, an alarm output is performed.

Claims (10)

1. Transformer substation environment monitoring system, it is characterized in that, comprises: Power-off protection device, alarm terminal, monitoring terminal, Zigbee coordinator and a plurality of Zigbee terminal nodes and a plurality of sensor units that are deployed in substation different areas; Said Zigbee coordinator Form a star topology network with the plurality of Zigbee terminal nodes; the sensor unit is connected to the Zigbee terminal nodes in one-to-one correspondence, and the Zigbee coordinator is connected to the monitoring terminal; the alarm terminal and the power-off protection device are both It is connected with the monitoring terminal; the sensor unit includes a sensor for monitoring the working state of the substation and a sensor for monitoring the environment of the substation. 2. The substation environmental monitoring system as claimed in claim 1, wherein the power-off protection device comprises a PLC programmable controller and a relay, the input end of the relay is connected with the PLC programmable controller, and the relay The output terminal is connected to the power line in the substation. 3. The substation environment monitoring system according to claim 1, wherein the sensors for monitoring the working state of the substation include voltage sensors and current sensors connected to the substation through cables. 4. The substation environment monitoring system according to claim 1, wherein the sensors for monitoring the substation environment include temperature and humidity sensors, open flame detectors, smoke sensors and harmful gas concentration sensors. 5. The substation environment monitoring system according to claim 4, wherein the temperature and humidity sensor is a DHT11 sensor. 6. The substation environment monitoring system according to claim 4, wherein the harmful gas concentration sensor is a SF6 concentration detection sensor. 7. The substation environment monitoring system according to claim 1, wherein the alarm terminal comprises an audible and visual alarm. 8. The substation environment monitoring system according to claim 1, characterized in that the monitoring system further comprises an exhaust fan arranged on the wall of the substation, and the exhaust fan is connected with the monitoring terminal. 9. The substation environment monitoring system according to claim 1, wherein the monitoring terminal is a host computer and/or a mobile terminal. 10. The substation environment monitoring system according to claim 1, characterized in that, the monitoring system further comprises a serial port display circuit connected to the Zigbee terminal nodes in a one-to-one correspondence.