CN218938052U - Sulfur hexafluoride gas density online monitoring system - Google Patents
Sulfur hexafluoride gas density online monitoring system Download PDFInfo
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- CN218938052U CN218938052U CN202223314069.0U CN202223314069U CN218938052U CN 218938052 U CN218938052 U CN 218938052U CN 202223314069 U CN202223314069 U CN 202223314069U CN 218938052 U CN218938052 U CN 218938052U
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Abstract
The utility model discloses an online monitoring system for sulfur hexafluoride gas density, and belongs to the technical field of gas monitoring. The gas density transmitter is connected with the wireless transceiver device in a wired mode, the wireless transceiver device is connected with the sink node device in a wireless mode, the sink node device is connected with the access node device in a wired mode or is connected with the monitoring background in a wireless mode, and the access node device is connected with the monitoring background in a wired mode. The utility model has reliable data transmission, clear architecture, standard communication and simple construction, can ensure the real-time performance and reliability of data transmission and accurately realize the on-line monitoring of sulfur hexafluoride gas density.
Description
Technical Field
The utility model belongs to the technical field of gas monitoring, and particularly relates to an online monitoring system for sulfur hexafluoride gas density.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In a high-voltage power system, sulfur hexafluoride gas is widely used, and is colorless, odorless, nontoxic and nonflammable. Under a uniform electric field, the insulation is three times that of air; at four atmospheres, the insulation is equivalent to transformer oil. However, sulfur hexafluoride gas is not discharged at will as a greenhouse gas; when the sulfur hexafluoride electric product is used, if the sulfur hexafluoride electric product leaks, the reliable and safe operation of the sulfur hexafluoride electric product cannot be ensured, and meanwhile, the environment can be damaged. Therefore, real-time online monitoring of whether sulfur hexafluoride gas leaks has become one of the important tasks of the power sector.
At present, a sulfur hexafluoride gas density state monitoring system of an electric power system mainly uses wired communication, and the system has the problems of complex wiring, unclear architecture, nonstandard communication protocol and the like; some wireless gas density transmitter products adopt wireless transmission, such as GPRS, NB-IoT and the like, and a single transmitter is required to be provided with a SIM card or an Internet of things card to be independently communicated with a base station, so that the cost is high; if more metal devices are distributed around the installation position, the wireless signal quality is poor, and the data real-time performance and reliability cannot be ensured. Therefore, based on application environment and market demand, development of a novel on-line monitoring system for sulfur hexafluoride gas density is urgently needed.
Disclosure of Invention
The utility model aims to provide an on-line monitoring system for sulfur hexafluoride gas density, which has the advantages of reliable data transmission, clear architecture, standard communication and simple construction, ensures the real-time performance and reliability of data transmission, accurately realizes on-line monitoring of sulfur hexafluoride gas density, and solves the problems in the prior art.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model relates to an on-line monitoring system for sulfur hexafluoride gas density, which comprises a gas density transmitter, a wireless receiving and transmitting device, a sink node device, an access node device and a monitoring background, wherein the gas density transmitter is connected with the wireless receiving and transmitting device in a wired mode, the wireless receiving and transmitting device is connected with the sink node device in a wireless mode, the sink node device is connected with the access node device in a wired mode or in a wireless mode, and the access node device is connected with the monitoring background in a wired mode.
Preferably, the gas density transmitter is in wired connection with the wireless receiving and transmitting device by adopting an RS485 bus, the access node device is in wired connection with the monitoring background by adopting an Ethernet or an optical cable, and the wireless receiving and transmitting device is in wireless connection with the sink node device by adopting Lora 2.4 GHz.
Preferably, the sink node device and the access node device are in wireless connection by using Lora470MHz or 4G, or the sink node device and the access node device are in wired connection by using a network cable or an RS485 bus.
Preferably, the gas density transmitter comprises a temperature sensor, a pressure sensor, a signal conditioning unit, a first micro-control unit, a first power supply unit and an RS485 sending unit, wherein the temperature sensor and the pressure sensor transmit signals to the signal conditioning unit, the signal conditioning unit transmits signals to the first micro-control unit, the first micro-control unit sends signals to the wireless transceiver through the RS485 sending unit, and the first power supply unit is used for supplying power to an internal circuit of the gas density transmitter.
Preferably, the wireless transceiver device comprises a plurality of RS485 receiving units, a signal isolation unit, a second microcontroller unit, a first LORA wireless transmitting unit and a second power supply unit, wherein the plurality of RS485 receiving units are used for receiving signals sent by the gas density transmitter RS485 transmitting unit and transmitting the signals to the signal isolation unit, the signal isolation unit transmits the signals to the second microcontroller unit, the second microcontroller unit transmits the signals to the sink node device through the first LORA wireless transmitting unit, and the second power supply unit is used for supplying power to an internal circuit of the wireless transceiver device.
Preferably, the sink node device includes a plurality of first LORA wireless receiving units, a signal isolation unit, a third microcontroller unit, a second LORA wireless transmitting unit, an RJ45 transmitting unit and a third power supply unit, wherein the plurality of first LORA wireless receiving units receive signals sent by the first LORA wireless transmitting unit of the wireless transceiver device, transmit the signals to the signal isolation unit, the signal isolation unit transmits the signals to the third microcontroller unit, the third microcontroller unit transmits the signals through the second LORA wireless transmitting unit, and the third power supply unit is used for supplying power to an internal circuit of the sink node device.
Preferably, the access node device includes a second LORA wireless receiving unit, an RJ45 receiving unit, a signal isolation unit, a fourth microcontroller unit, an optical port transmitting unit and a fourth power supply unit, where the second LORA wireless receiving unit receives a signal sent by the second LORA wireless transmitting unit of the sink node device, and transmits the signal to the signal isolation unit, the signal isolation unit transmits the signal to the fourth microcontroller unit, the fourth microcontroller unit sends the signal to the monitoring background through the optical port transmitting unit, and the fourth power supply unit is used for supplying power to an internal circuit of the access node device.
Preferably, the third microcontroller unit transmits the signal through an RJ45 transmitting unit, and the RJ45 receiving unit of the access node device receives the signal transmitted by the RJ45 transmitting unit and transmits the signal to the fourth microcontroller unit.
Preferably, the RS485 communication adopts Modbus/RTU protocol, the wireless Lora 2.4GHz and Lora470MHz adopt national power grid standard Internet of things communication protocol, and the Ethernet or optical cable communication adopts standard IEC61850 protocol.
Preferably, the gas density transmitter is installed on an equipment layer of the intelligent substation, the wireless transceiver and the sink node device are installed on a spacer layer of the intelligent substation, and the access node device is installed on a station control layer of the intelligent substation.
The utility model has the following beneficial effects:
1. the gas density online monitoring system fully considers the defects of the existing monitoring system and the latest market demands, has the advantages of reliable communication, clear architecture, standardized protocol, simple construction and maintenance and the like, is realized by adopting the combination of wired and wireless data transmission in the system based on the installation position and the working environment of each device of the system, and ensures the reliability of the data transmission; the part with larger influence on the signal adopts wired transmission, and the part with long distance or inconvenient wiring adopts wireless transmission, thereby ensuring the reliability of data transmission.
2. The system has clear architecture, layered arrangement and easy construction and maintenance; the system is integrally divided into an equipment layer, a spacing layer and a station control layer, and is arranged in a layered manner, so that the limit is clear and the construction and maintenance are simple.
3. The system adopts a redundant design, can be connected with a subsequent extension device, reserves related interfaces and spaces, and is convenient for the connection of the subsequent extension device.
4. The communication among the devices in the system adopts standardized protocols, thereby realizing the exchange and compatibility of equipment of different factories.
Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model.
FIG. 2 is a schematic diagram of a gas density transmitter according to the present utility model.
Fig. 3 is a schematic structural diagram of a wireless transceiver according to the present utility model.
Fig. 4 is a schematic structural diagram of a sink node device according to the present utility model.
Fig. 5 is a schematic diagram of an access node apparatus according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
referring to fig. 1-5, the utility model discloses an on-line sulfur hexafluoride gas density monitoring system, which comprises a gas density transmitter, a wireless transceiver, a sink node device, an access node device and a monitoring background, wherein the gas density transmitter and the wireless transceiver are connected by wires, the wireless transceiver and the sink node device are connected by wires or wirelessly, and the sink node device and the access node device are connected by wires.
The gas density transmitter is arranged on the equipment layer of the intelligent substation, the wireless transceiver and the sink node device are arranged on the spacer layer of the intelligent substation, and the access node device is arranged on the station control layer of the intelligent substation.
The intelligent transformer substation is divided into a process layer (equipment layer), a spacer layer and a station control layer according to the constitution and the function.
The process layer (equipment layer) comprises intelligent equipment, a merging unit and an intelligent terminal, wherein the intelligent equipment, the merging unit and the intelligent terminal are formed by primary equipment and intelligent components, and the related functions of substation electric energy distribution, transformation, transmission, measurement, control, protection, metering, state monitoring and the like are completed.
The spacer layer device generally refers to secondary devices such as a relay protection device, a measurement and control device and the like, and realizes the functions of using one spacer data and acting on the spacer primary device, namely, communicating with various remote input/output, intelligent sensors and controllers.
The station control layer comprises subsystems such as an automation system, station domain control, a communication system, a time synchronization system and the like, realizes functions of measurement and control for all stations or more than one primary equipment, and completes related functions such as data acquisition and Supervisory Control (SCADA), operation locking, synchronous phasor acquisition, electric energy acquisition, protection information management and the like.
The gas density transmitter is used as a state sensing sensor and is responsible for collecting gas state data of main equipment; the wireless transceiver is connected with the gas density transmitter in a wired mode and is responsible for collecting transmitter data in the same interval or similar range; the sink node device is responsible for gathering the data of the wireless transceiver device in the same area and then transmitting the data to the access node device in a wired or wireless mode; the access node device conforms to a standardized data transmission protocol and can access a standardized monitoring background. The data transmission in the system is combined by wires and wireless, the part with larger influence on signals is transmitted by wires, and the part with long distance or inconvenient wiring is transmitted by wireless.
Specifically, the gas density transmitter is in wired connection with the wireless transceiver through an RS485 bus, so that the real-time performance and the reliability of acquired data are guaranteed. The RS485 bus can support 64 transmitters to be hung up, and can meet the field installation requirement.
The wireless transceiver device and the sink node device are in wireless connection by adopting Lora 2.4GHz, so that a plurality of wireless transceiver devices and the sink node device in the interval layer can be reliably networked.
The sink node device and the access node device are connected in a wireless way by adopting Lora470MHz or 4G, or the sink node device and the access node device are connected in a wired way by adopting a network cable or an RS485 bus, so that the remote transmission and reliable networking of a plurality of sink node devices in the interval layer and the access node device in the station control layer are realized.
The access node device is connected with the monitoring background by adopting an Ethernet or an optical cable in a wired way, so that the background display and the system control function of the monitoring data are realized.
The sulfur hexafluoride gas density online monitoring system of the embodiment adopts a redundant design, and the sink node device and the access node device are reserved with relevant interfaces and spaces, so that the access of the subsequent extension device is facilitated. The data transmission in the system adopts a standardized protocol, so that the compatibility and the exchange of equipment of different factories can be realized.
The RS485 communication adopts a Modbus/RTU protocol, the wireless Lora 2.4GHz and Lora470MHz adopt national power grid standard Internet of things communication protocols, and the Ethernet or optical cable communication adopts a standard IEC61850 protocol.
As shown in fig. 2, the gas density transmitter includes a temperature sensor, a pressure sensor, a signal conditioning unit, a first micro control unit, a first power supply unit and an RS485 transmitting unit, where the temperature sensor and the pressure sensor transmit signals to the signal conditioning unit, the signal conditioning unit processes the received signals into standard I2C digital signals for transmission to the first micro control unit, the first micro control unit collects digital temperature signals and pressure signals through an I2C interface, calculates standard gas density through a special gas density algorithm, converts the digitized temperature, pressure and density signals into RS485 signals, and transmits the RS485 signals to the wireless transceiver in a mode of standardized Modbus/RTU protocol, and the first power supply unit is used for supplying power to an internal circuit of the gas density transmitter.
As shown in fig. 3, the wireless transceiver device includes a plurality of RS485 receiving units, a signal isolation unit, a second microcontroller unit, a first LORA wireless transmitting unit and a second power supply unit, where the plurality of RS485 receiving units are configured to receive signals sent by the gas density transmitter RS485 transmitting unit and transmit the signals to the signal isolation unit, and the signal isolation unit implements isolation of input signals, filters and avoids influence of external interference on the controller unit; and after receiving the isolated input signal, the second microcontroller unit sends the signal to the sink node device through the first LORA wireless sending unit according to the communication protocol of the Internet of things of the national power grid standard and the data specification format requirement of the micropower sensor, and the second power supply unit is used for supplying power to the internal circuit of the wireless receiving and transmitting device.
As shown in fig. 4, the sink node device includes a plurality of first LORA wireless receiving units, a signal isolation unit, a third microcontroller unit, a second LORA wireless transmitting unit, an RJ45 transmitting unit and a third power supply unit, where the plurality of first LORA wireless receiving units receive signals sent by the first LORA wireless transmitting unit of the wireless transceiver device, and transmit the signals to the signal isolation unit, and the signal isolation unit implements isolation of input signals, filters and avoids influence of external interference on the controller unit; and after receiving the isolated input signal, the third microcontroller unit transmits the signal through a second LORA wireless transmitting unit according to the communication protocol of the Internet of things of national power grid standard and the data specification format requirement of the low-power consumption sensor, and the third power supply unit is used for supplying power to the internal circuit of the sink node device.
As shown in fig. 5, the access node device includes a second LORA wireless receiving unit, an RJ45 receiving unit, a signal isolation unit, a fourth microcontroller unit, an optical port transmitting unit and a fourth power supply unit, where the second LORA wireless receiving unit receives a signal sent by the second LORA wireless transmitting unit of the sink node device, and transmits the signal to the signal isolation unit, and the signal isolation unit implements isolation of an input signal, filters and avoids an influence of external interference on the controller unit; and after receiving the isolated input signal, the fourth microcontroller unit sends the signal to the monitoring background through the optical port sending unit according to the national power grid standard Internet of things communication protocol-data standard format requirement of the collecting node device, and the fourth power supply unit is used for supplying power to the internal circuit of the access node device.
Or when the sink node device and the access node device are connected by adopting a network cable or an RS485 bus, the third microcontroller unit transmits signals through the RJ45 transmitting unit, and the RJ45 receiving unit of the access node device receives the signals transmitted by the RJ45 transmitting unit and transmits the signals to the fourth microcontroller unit.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The sulfur hexafluoride gas density online monitoring system is characterized by comprising a gas density transmitter, a wireless receiving and transmitting device, a sink node device, an access node device and a monitoring background, wherein the gas density transmitter and the wireless receiving and transmitting device are connected in a wired mode, the wireless receiving and transmitting device and the sink node device are connected in a wireless mode, the sink node device and the access node device are connected in a wired mode or in a wireless mode, and the access node device and the monitoring background are connected in a wired mode.
2. The sulfur hexafluoride gas density online monitoring system according to claim 1, wherein the gas density transmitter and the wireless transceiver device are connected by an RS485 bus, and the access node device and the monitoring background are connected by an ethernet or an optical cable.
3. The sulfur hexafluoride gas density online monitoring system according to claim 2, wherein the wireless transceiver device is wirelessly connected with the sink node device by using Lora 2.4 GHz.
4. The sulfur hexafluoride gas density online monitoring system according to claim 3, wherein the sink node device and the access node device are connected wirelessly by using Lora470MHz or 4G, or the sink node device and the access node device are connected by using a network cable or an RS485 bus.
5. The sulfur hexafluoride gas density online monitoring system of claim 1, wherein the gas density transmitter comprises a temperature sensor, a pressure sensor, a signal conditioning unit, a first micro-control unit, a first power supply unit and an RS485 transmitting unit, wherein the temperature sensor and the pressure sensor transmit signals to the signal conditioning unit, the signal conditioning unit transmits signals to the first micro-control unit, the first micro-control unit transmits signals to the wireless transceiver through the RS485 transmitting unit, and the first power supply unit is used for supplying power to the internal circuit of the gas density transmitter.
6. The sulfur hexafluoride gas density online monitoring system of claim 5, wherein the wireless transceiver device comprises a plurality of RS485 receiving units, a signal isolation unit, a second microcontroller unit, a first LORA wireless transmitting unit and a second power supply unit, wherein the plurality of RS485 receiving units are used for receiving signals sent by the gas density transmitter RS485 transmitting unit and transmitting the signals to the signal isolation unit, the signal isolation unit transmits the signals to the second microcontroller unit, the second microcontroller unit transmits the signals to the sink node device through the first LORA wireless transmitting unit, and the second power supply unit is used for supplying power to internal circuits of the wireless transceiver device.
7. The sulfur hexafluoride gas density online monitoring system according to claim 6, wherein the sink node device comprises a plurality of first LORA wireless receiving units, a signal isolation unit, a third microcontroller unit, a second LORA wireless transmitting unit, an RJ45 transmitting unit and a third power supply unit, the plurality of first LORA wireless receiving units receive signals transmitted by the first LORA wireless transmitting unit of the wireless transceiver device, the signals are transmitted to the signal isolation unit, the signal isolation unit transmits the signals to the third microcontroller unit, the third microcontroller unit transmits the signals through the second LORA wireless transmitting unit, and the third power supply unit is used for supplying power to the internal circuit of the sink node device.
8. The sulfur hexafluoride gas density online monitoring system of claim 7, wherein the access node device comprises a second LORA wireless receiving unit, an RJ45 receiving unit, a signal isolation unit, a fourth microcontroller unit, an optical port transmitting unit and a fourth power supply unit, the second LORA wireless receiving unit receives signals transmitted by the second LORA wireless transmitting unit of the sink node device, transmits the signals to the signal isolation unit, the signal isolation unit transmits the signals to the fourth microcontroller unit, the fourth microcontroller unit transmits the signals to the monitoring background through the optical port transmitting unit, and the fourth power supply unit is used for supplying power to the internal circuit of the access node device.
9. The sulfur hexafluoride gas density online monitoring system of claim 8 wherein the third microcontroller unit transmits signals through an RJ45 transmit unit and the RJ45 receive unit of the access node device receives signals transmitted by the RJ45 transmit unit and transmits signals to the fourth microcontroller unit.
10. The sulfur hexafluoride gas density online monitoring system of claim 4 wherein RS485 communication uses Modbus/RTU protocol, wireless Lora 2.4GHz and Lora470MHz use national grid standard internet of things communication protocol, and ethernet or fiber optic cable communication uses standard IEC61850 protocol.
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| CN202223314069.0U CN218938052U (en) | 2022-12-09 | 2022-12-09 | Sulfur hexafluoride gas density online monitoring system |
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| CN202223314069.0U CN218938052U (en) | 2022-12-09 | 2022-12-09 | Sulfur hexafluoride gas density online monitoring system |
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