CN203148469U - Monitoring device for environmental state parameters of switchgear based on ZigBee network - Google Patents

Abstract

The utility model discloses a switch cabinet environmental state parameter monitoring device based on ZigBee network, which comprises several sensors, multi-core cables, monitoring terminals, ZigBee wireless network, first ZigBee chip and computer. Cable is connected with described monitoring terminal, and monitoring terminal comprises ARM processor, power supply and the second ZigBee chip, and described power supply and the second ZigBee chip are all connected with ARM processor, and described first ZigBee chip is connected with described computer, so The first ZigBee chip and the second ZigBee chip are connected through the ZigBee wireless network, and the monitoring terminal performs data transmission with a computer through the ZigBee wireless network. The environmental state parameter monitoring device of the switchgear of the utility model has a compact structure, and the monitoring terminal is a fixed installation type, and the installation structure does not affect the original design of the switchgear, and can effectively monitor the environmental state parameters of the switchgear on site.

Description

Monitoring device for environmental state parameters of switchgear based on ZigBee network

technical field

The utility model relates to a switch cabinet environment state parameter monitoring device based on a ZigBee network, which belongs to the technical field of power equipment state monitoring.

Background technique

With the rapid development of my country's power industry construction, the modern power system is developing in the direction of large power grids, large units, ultra-high voltage, and large capacity. In order to ensure the stability and reliability of the power system, more safety requirements for power equipment are also proposed high demands.

In recent years, switchgears have been widely used in urban power grids. Once some defects appear in the switchgear equipment, equipment failures are prone to occur. With the increase of the number of switchgear substations, the probability of switchgear equipment failure is also increasing. In the past, people thought that switchgear equipment was maintenance-free equipment. In addition, the number of switchgear substations was small, and the means and measures for monitoring equipment failure were relatively limited. Therefore, it is of great significance to strengthen and improve the handover test of switchgear equipment and the operation monitoring of switchgear equipment to ensure the safe operation of switchgear equipment.

Practice has proved that the internal faults of the switchgear are mainly insulation faults. The environmental state parameters in the switchgear mainly include temperature, humidity, oxygen content and sulfur hexafluoride gas content. When the insulation of the conductors in the switchgear is deteriorated, the leakage current of the conductors will increase, which will greatly increase the current flowing through the conductors, and then the temperature in the switchgear will rise sharply. The ambient humidity in the switch cabinet is one of the important factors affecting the long-term operation of the equipment in the cabinet. Generally, there are certain heating and dehumidification equipment in the switch cabinet, but when the equipment fails, or the humidity increases sharply in a short period of time, it is easy to form damp in the cabinet. Gas, and condenses into water on the surface of various equipment inside the shell. The structure of the equipment is easy to accelerate aging or cause metal corrosion under the combined action of water vapor and temperature, which has an important impact on the insulation performance. Sulfur hexafluoride gas-insulated combination switchgear is generally used inside the switchgear. When the insulating gas in this type of switchgear leaks, the insulation performance of the appliance will decrease, which will affect the insulation strength of the switch. Due to the relatively closed structure of the switchgear, leakage Sulfur hexafluoride gas is easy to gather at the bottom of the switch cabinet, and the gas leakage in the switch cabinet can be reflected by installing the oxygen content and the sulfur hexafluoride gas content at the bottom of the switch cabinet.

The environmental state in the switchgear is one of the factors that reflect the insulation performance of the switchgear. It is a symptom and manifestation of the insulation deterioration of the switchgear, and it is also the cause of further deterioration of the insulation. Therefore, monitoring the relevant environmental state parameters of the switchgear such as temperature, humidity, oxygen content and sulfur hexafluoride gas content can detect early insulation defects inside it, so that measures can be taken to avoid its development. In order to monitor the environmental state parameters inside the switchgear in real time, find its early insulation defects, ensure the normal operation of the switchgear, and reduce the accident rate, it is urgent to install a monitoring device for the environmental state parameters of the switchgear.

Contents of the invention

The purpose of this utility model is to provide a ZigBee network-based switchgear environmental state parameter monitoring device for the defects of the prior art. Effective monitoring of environmental state parameters.

The technical scheme for realizing the above-mentioned purpose is:

The switchgear environmental state parameter monitoring device based on ZigBee network, comprises several sensors, multi-core cable, monitoring terminal, ZigBee wireless network, the first ZigBee chip and computer, and each sensor is connected with described monitoring terminal by described multi-core cable The monitoring terminal carries out data transmission through the ZigBee wireless network and the computer; the sensors include a temperature sensor, a humidity sensor, an oxygen sensor and a sulfur hexafluoride gas sensor; the monitoring terminal includes an ARM (Advanced RISCMachines) processor , power supply and the second ZigBee chip, the power supply and the second ZigBee chip are all connected with the ARM processor; the first ZigBee chip is connected with the computer; the first ZigBee chip and the second ZigBee chip pass through the ZigBee Wi-Fi connection, where:

The temperature sensor collects the temperature data of the environmental state of the switch cabinet, and sends the temperature data to the ARM processor through the multi-core cable;

The humidity sensor collects the humidity data of the environmental state of the switch cabinet, and sends the humidity data to the ARM processor through the multi-core cable;

The oxygen sensor collects the oxygen content data of the environmental state of the switchgear, and sends the oxygen content data to the ARM processor through the multi-core cable;

The sulfur hexafluoride gas sensor collects the sulfur hexafluoride gas content data in the environmental state of the switchgear, and sends the sulfur hexafluoride gas content data to the ARM processor through the multi-core cable;

The ARM processor stores the received data of various environmental state parameters of the switchgear, and transmits the data to the computer through the first ZigBee chip and the second ZigBee chip to configure a suitable frequency band antenna and utilize the ZigBee wireless network.

In the above ZigBee network-based switchgear environmental state parameter monitoring device, wherein the ZigBee wireless network includes several router nodes and a coordinator.

The above ZigBee network-based switchgear environmental state parameter monitoring device, wherein the computer is equipped with multiple alarm information output interfaces, including relay stem nodes, 485 communication network interfaces and GSM short message sending interfaces.

In the above ZigBee network-based monitoring device for environmental state parameters of switch cabinets, the sensors are distributed in corners inside the switch cabinet; the monitoring terminals are installed on the panel of the switch cabinet.

Compared with the prior art, the ZigBee network-based environmental state parameter monitoring device of the switch cabinet of the present utility model utilizes the ZigBee wireless network for data transmission, and has a compact structure, and the monitoring terminal is a fixed installation type, and the installation structure does not conform to the original design of the switch cabinet. It can effectively monitor the environmental state parameters of the switchgear such as temperature, humidity, oxygen content and sulfur hexafluoride gas content on site.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the utility model;

Fig. 2 is the composition schematic diagram of ZigBee wireless network of the present utility model;

Fig. 3 is a schematic layout diagram of on-site use of the utility model;

Fig. 4 is a working principle block diagram of the monitoring terminal of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present utility model, its specific implementation will be described in detail below in conjunction with the accompanying drawings:

Please refer to Fig. 1, the switchgear environment state parameter monitoring device based on ZigBee network of the present utility model, comprises several sensors, multicore cable 2, monitoring terminal 3, ZigBee wireless network 4, the first ZigBee chip 5 and computer 6, each sensor Link to each other with monitoring terminal 3 by multicore cable 2; Monitoring terminal 3 carries out data transmission with computer 6 through ZigBee wireless network 4; Each sensor comprises temperature sensor 11, humidity sensor 12, oxygen sensor 13 and sulfur hexafluoride gas sensor 14; Monitoring Terminal 3 comprises ARM processor 31, power supply 32 and second ZigBee chip 33, and power supply 32 and second ZigBee chip 33 are all connected with ARM processor 31; First ZigBee chip 5 is connected with computer 6; First ZigBee chip 5 and the second The two ZigBee chips 33 are connected through the ZigBee wireless network 4 .

The temperature sensor 11 , the humidity sensor 12 , the oxygen sensor 13 and the sulfur hexafluoride gas sensor 14 are all connected to the ARM processor 31 through the multi-core cable 2 . The temperature sensor 11 collects the temperature data of the environmental state of the switch cabinet, and sends the temperature data to the ARM processor 31 through the multi-core cable 2; the humidity sensor 12 collects the humidity data of the environmental state of the switch cabinet, and sends the humidity data through the multi-core cable 2 Give ARM processor 31; Oxygen sensor 13 gathers the oxygen content data of switchgear environmental state, and sends oxygen content data to ARM processor 31 by multicore cable 2; Sulfur fluoride gas content data, and send the sulfur hexafluoride gas content data to the ARM processor 31 through the multi-core cable 2.

ARM processor 31 controls the whole data acquisition process, stores the data of various switch cabinet environmental state parameters received, and configures a suitable frequency band antenna through the first ZigBee chip 5 and the second ZigBee chip 33 to utilize the ZigBee wireless network 4 to transfer the data Transfer to computer 6.

The computer 6 receives data of various environmental state parameters of the switch cabinet, analyzes and processes the data of the environmental state parameters of the switch cabinet, and obtains alarm information. The computer 6 is equipped with a variety of alarm information output interfaces, including relay stem nodes, 485 communication network interfaces, and GSM short message sending interfaces, etc., which can be selected and configured according to the actual environmental conditions on site and customer needs.

Referring to FIG. 2 again, the ZigBee wireless network 4 includes several router nodes 41 and a coordinator 42 . Using ZigBee wireless network for data communication can reduce the difficulty of on-site wiring. At the same time, the ZigBee communication protocol has a flexible structure of ad hoc network, which is conducive to the direct layout and communication management of multiple sensors on site. ZigBee uses the 2.4GHz public frequency band, which is staggered from the frequency of signal sensitivity and collection, and will not interfere with the collection signal.

Please refer to Fig. 3 again, the switchgear environmental state parameter monitoring device based on ZigBee network of the present utility model, when using in the field, adopts the distributed sensor layout method to arrange various sensors in the switchgear 7 inside, in order not to affect the inside of the switchgear The structure itself, various sensors are fixed in the corners of the switch cabinet 7; the monitoring terminal 3 is installed on the panel of the switch cabinet 7.

Please refer to Fig. 4 again, the working principle of the monitoring terminal 3 of the present utility model is as follows: 1) Initialize first, set various initial parameters, etc.; 2) Then specify the corresponding temperature sensor to collect the temperature in the switch cabinet according to the set parameters Change data; 3) Then specify the corresponding humidity sensor to collect the humidity change data in the switch cabinet according to the set parameters; 4) Then specify the corresponding oxygen sensor to collect the oxygen content data in the switch cabinet according to the set parameters; 5) Then Specify the corresponding sulfur hexafluoride gas sensor to collect the data of sulfur hexafluoride gas content in the switchgear according to the set parameters; 6) Then record the data of temperature, humidity, oxygen content and sulfur hexafluoride gas content; 7) Finally The data of various parameters is transmitted to the computer through the ZigBee wireless network.

In this embodiment, the temperature sensor uses Maxim's DS18B20, which uses a single-wire bus for data sensors; the humidity sensor uses a capacitive humidity sensor HM1520 from Humirel, France, which is suitable for low-humidity environments. HM1520 has 3 An integrated low humidity probe with two lead terminals, the typical value of its power supply terminal is 5V, and the range of measuring relative humidity is 0% to 20%; the oxygen content sensor adopts models KE-25 and KE-50, which are easy to use and useless Level signal output, the signal is stable, and will not be affected by other gases; the sulfur hexafluoride gas content sensor adopts the SM-SF6 series analog output sulfur hexafluoride sensor produced by York Company, which adopts double-beam non-spectral infrared detection technology, with Anti-interference from other gases, easy maintenance, good stability, self-contained temperature compensation, digital output and analog output with Modbus ASCII protocol, etc.; the ARM processor model is STM32F207; the first ZigBee chip and the second ZigBee chip are from TI The CC2510.

In summary, compared with the prior art, the switchgear environmental state parameter monitoring device based on ZigBee network of the present utility model uses ZigBee wireless network for data transmission, reduces the difficulty of on-site wiring, and has a compact structure, and the monitoring terminal is a fixed installation type , and the installation structure does not affect the original design of the switchgear, and the environmental state parameters of the switchgear can be effectively monitored on site.

The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the art can also make various transformations or modifications without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the category of the present utility model, and should be defined by each claim.

Claims (4)

1. based on the switch cubicle ambient condition parameter monitor device of ZigBee network, comprise some sensors, polycore cable, monitoring terminal, ZigBee wireless network, ZigBee chip and a computing machine, described each sensor links to each other with described monitoring terminal by described polycore cable, described monitoring terminal carries out data transmission by described ZigBee wireless network and computing machine, it is characterized in that described each sensor comprises temperature sensor, humidity sensor, oxygen sensor and sulfur hexafluoride gas sensor; Described monitoring terminal comprises arm processor, power supply and the 2nd ZigBee chip, and described power supply all links to each other with arm processor with the 2nd ZigBee chip; A described ZigBee chip links to each other with described computing machine; A described ZigBee chip links to each other by described ZigBee wireless network with the 2nd ZigBee chip, wherein:

Described temperature sensor is gathered the temperature data of switch cubicle ambient condition, and by described polycore cable temperature data is sent to arm processor;

Described humidity sensor is gathered the humidity data of switch cubicle ambient condition, and by described polycore cable humidity data is sent to arm processor;

Described oxygen sensor is gathered the oxygen content data of switch cubicle ambient condition, and by described polycore cable oxygen content data is sent to arm processor;

Described sulfur hexafluoride gas sensor is gathered the sulfur hexafluoride gas content data of switch cubicle ambient condition, and by described polycore cable the sulfur hexafluoride gas content data is sent to arm processor;

Described arm processor is stored the data of the various switch cubicle ambient condition parameters of reception, and utilizes the ZigBee wireless network to give described computing machine data transmission by a ZigBee chip and the suitable band antenna of the 2nd ZigBee chip configuration.

2. the switch cubicle ambient condition parameter monitor device based on the ZigBee network according to claim 1 is characterized in that described ZigBee wireless network comprises some router nodes and telegon.

3. the switch cubicle ambient condition parameter monitor device based on the ZigBee network according to claim 1, it is characterized in that, be furnished with multiple warning message output interface on the described computing machine, comprise relay dry contact, 485 communication network interfaces and GSM note transmission interface.

4. the switch cubicle ambient condition parameter monitor device based on the ZigBee network according to claim 1 is characterized in that described each sensor is distributed in the corner of switch cubicle inside; Described monitoring terminal is installed on the switch cabinet panel.

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