CN110567840A - Overvoltage-resistant gas density transmitter and monitoring system - Google Patents
Overvoltage-resistant gas density transmitter and monitoring system Download PDFInfo
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- CN110567840A CN110567840A CN201910830719.0A CN201910830719A CN110567840A CN 110567840 A CN110567840 A CN 110567840A CN 201910830719 A CN201910830719 A CN 201910830719A CN 110567840 A CN110567840 A CN 110567840A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention discloses a gas density transmitter. An overvoltage-resistant gas density transmitter comprises a shell, a pressure sensor fixing seat, a temperature sensor, an intelligent processor, a communication module and a connecting joint. The intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module. The intelligent processor acquires pressure signals through the pressure sensor, acquires temperature signals through the temperature sensor, and obtains corresponding density value P through processing of the intelligent processor according to the gas pressure-temperature characteristic20And the density value P can be remotely transmitted through the communication module20One or more values of the pressure value and the temperature value further realize the on-line monitoring of the gas of the electrical equipment. The pressure sensor is fixed on the pressure sensor fixing seat in a sealing way through a plurality of insulating partsThe shell of the force sensor is insulated from the pressure sensor fixing seat. The optimization design greatly improves the overvoltage resistance and the anti-interference capability of the gas density transmitter.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a high-performance gas density transmitter applied to high-voltage or medium-voltage electrical equipment.
Background
At present, SF6(sulfur hexafluoride) electrical equipment is widely applied to the power sector and industrial and mining enterprises, and rapid development of the power industry is promoted. In recent years, with the rapid development of economy, the capacity of a power system in China is rapidly expanded, and SF (sulfur hexafluoride) is6Electrical equipment is used more and more. SF6The gas has functions of arc extinction and insulation in high-voltage electrical equipment, and SF in the high-voltage electrical equipment6The density reduction of the gas will seriously affect the SF6Safe operation of high-voltage electrical equipment: SF6The reduction of the gas density to a certain extent will result in a loss of insulation and arc extinguishing properties.
With the development of the unattended transformer substation towards networking and digitization and the continuous enhancement of the requirements on remote control and remote measurement, the SF is subjected to6The online monitoring of the gas density and the micro-water content state of the electrical equipment has important practical significance. With the continuous and vigorous development of the Chinese smart grid and the ubiquitous power internet of things, the intelligent high-voltage electrical equipment is used as an important component and a key node of the intelligent substation, and plays a significant role in improving the safety of the smart grid. At present, most of high-voltage electrical equipment is SF6In the case of gas-insulated equipment, if the gas density is reduced (such as caused by leakage), the electrical performance of the equipment is seriously affected, and serious hidden danger is caused to safe operation. Currently on-line monitoring of SF6Gas density values in high-voltage electrical equipment are very common, and particularly, national grids propose to build a ubiquitous power internet of things, so that the application of a gas density monitoring system (gas density relay) is developed vigorously. Whereas current gas density monitoring systems (gas density relays) are basically: 1) using remote transmission of SF6The gas density relay realizes the collection and uploading of density, pressure and temperature, and realizes the online monitoring of gas density. 2) Density and pressure by gas density transmitterAnd the temperature is collected and uploaded, so that the online monitoring of the gas density is realized. SF6The gas density relay is the core and key component. Currently on-line monitoring of SF6SF in high voltage electrical equipment6Gas density values have become very common, for which density, pressure and temperature acquisition is achieved using gas density transmitters. It is obvious that the gas density transmitter is also a core and key component. However, the environment for the field operation of the high-voltage substation is severe, and particularly during the operation of the system, high overvoltage can be generated, which may cause direct damage to the sensor or the electronic component, and further cause the failure of the gas density transmitter. And electromagnetic interference in the field is very strong, which can also result in unreliable operation of the gas density transmitter. In summary, the currently used gas density transmitters have the following drawbacks: 1) are easy to damage; 2) abnormal signal transmission often occurs. The existing product is difficult to be suitable for outdoor severe environment work and meet the construction requirements of ubiquitous power Internet of things.
Disclosure of Invention
The invention aims to solve the defects of the existing problems and provides an overvoltage-resistant gas density transmitter and a monitoring system. The invention is used for monitoring the gas density of gas-insulated or arc-extinguishing electrical equipment in real time, improving the efficiency, reducing the operation and maintenance cost and ensuring the safe operation of a power grid.
The invention is realized in such a way that the overvoltage-resistant gas density transmitter comprises a shell, a pressure sensor fixing seat, a temperature sensor, an intelligent processor, a communication module, a connecting joint and a power supply, wherein the pressure sensor, the pressure sensor fixing seat, the temperature sensor, the intelligent processor, the communication module, the connecting joint and the power supply are arranged in the shell; the intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module; the intelligent processor acquires pressure signals through the pressure sensor, acquires temperature signals through the temperature sensor, and obtains corresponding density value P through processing of the intelligent processor according to the gas pressure-temperature characteristic20And remotely transmitting the density value P through the communication module20Or the density value, the pressure value and the temperature value, or the pressure value and the temperature value, so as to realize the online monitoring of the gas density value, or the density value, the pressure value and the temperature value, or the pressure value, the temperature value, the pressure value and the temperature value of the electrical equipment,A temperature value; the pressure sensor is fixed on the pressure sensor fixing seat in a sealing mode through a plurality of insulating parts, and the shell of the pressure sensor is insulated from the pressure sensor fixing seat.
The overvoltage-resistant gas density transmitter further comprises an electric field shielding piece, and the electric field shielding piece is arranged outside the pressure sensor and/or the electronic component part.
The overvoltage-resistant gas density transmitter further comprises a magnetic field shielding piece, and the magnetic field shielding piece is arranged outside the pressure sensor and/or the electronic component part.
The overvoltage-resistant gas density transmitter further comprises a thermal insulation piece, wherein the thermal insulation piece is arranged at the power supply; alternatively, the temperature sensor is remote from the power source.
The intelligent processor is loaded with an embedded algorithm and a control program of an embedded system based on a microprocessor.
The overvoltage-resistant gas density transmitter further comprises a value display device, wherein the value display device comprises a signal contact, a movement, a pointer and a dial, or comprises a digital display device.
The overvoltage-resistant gas density transmitter further comprises an electromagnetic shielding part on the outer side or the inner side of the shell.
The overvoltage-resistant gas density transmitter is characterized in that the intelligent processor and/or the communication module are/is provided with a shielding piece.
The intelligent processor is suitable for measuring gas density transmitters of relative pressure and absolute pressure types.
The overvoltage-resistant gas density transmitter is provided with a man-machine interaction interface: the method comprises the steps of providing a data display interface, and refreshing a current data value in real time; has data input and parameter set value input boxes.
The overvoltage-resistant gas density transmitter is characterized in that an electrical interface of the gas density transmitter has the functions of misconnection prevention and electromagnetic interference resistance protection.
According to the overvoltage-resistant gas density transmitter, the intelligent processor realizes remote transmission of test data and/or results through the communication module; the communication module is arranged on the electronic component shell or the mechanical shell.
The overvoltage-resistant gas density transmitter further comprises a clock, and the clock is loaded on the intelligent processor to record the test time.
The control of the intelligent processor can be controlled on site, or controlled in a background, or the two can interact with each other to complete the control.
The overvoltage-resistant gas density transmitter also comprises a micro-water sensor for monitoring the micro-water value of the gas on line.
The overvoltage-resistant gas density transmitter also comprises a decomposer sensor which can monitor gas decomposers on line.
The overvoltage-resistant gas density transmitter also comprises an expert management analysis system for detecting, analyzing and judging the gas density monitoring, the performance of the gas density transmitter and monitoring elements.
The overvoltage-resistant gas density transmitter also comprises a plurality of insulating pieces, and the insulation among the pressure sensor, the shell and the connecting joint is realized through the plurality of insulating pieces; and the housing of the pressure sensor and the housing of the gas density transmitter are insulated from each other.
A gas density monitoring system comprised of the overvoltage resistant gas density transmitter, comprising: the overvoltage-resistant gas density transmitters are connected with a remote background detection system sequentially through the concentrator and the protocol converter; the overvoltage-resistant gas density transmitters are respectively arranged on the electrical equipment of the corresponding gas chambers.
The gas density monitoring system consists of the overvoltage-resistant gas density transmitter, and the protocol converter is an IEC61850 or 104 protocol converter.
The gas density monitoring system composed of the overvoltage-resistant gas density transmitter is characterized in that an RS485 hub is adopted as the hub, and an IEC61850 protocol converter or an IEC104 protocol converter is further connected with a network service printer and a network data router respectively.
The invention provides a high-performance gas density transmitter which comprises a shell, a pressure sensor fixing seat, a temperature sensor, an intelligent processor, a communication module and a connecting joint. The intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module. The intelligent processor acquires pressure signals through the pressure sensor, acquires temperature signals through the temperature sensor, and obtains corresponding density value P through processing of the intelligent processor according to the gas pressure-temperature characteristic20(i.e.a pressure value P of 20 ℃ C.)20) And the density value P can be remotely transmitted through the communication module20Or the density value, the pressure value and the temperature value, or the pressure value and the temperature value, so as to realize online monitoring of the gas density value, or the density value, the pressure value and the temperature value, or the pressure value and the temperature value of the electrical equipment. In order to improve the overvoltage resistance, the pressure sensor is fixed on the pressure sensor fixing seat in a sealing mode through the plurality of insulating parts, and the shell of the pressure sensor is insulated from the pressure sensor fixing seat, so that the overvoltage resistance and the electromagnetic interference resistance can be greatly improved.
The invention provides a high-performance gas density transmitter for high-voltage electrical equipment, wherein a shell of a pressure sensor is insulated from a pressure sensor fixing seat, so that the overvoltage resistance and the electromagnetic interference resistance can be greatly improved. In addition, a shield is added, which can shield the electric field or the magnetic field by utilizing the reflection and/or absorption of the shield material to reduce the EMI radiation. The effective addition of the shielding material can reduce or eliminate unnecessary gaps, inhibit electromagnetic coupling radiation, and reduce electromagnetic leakage and interference. Materials with high electric and magnetic conductivity can be used as electromagnetic shielding materials (such as iron), and the shielding performance is generally required to be 40-60 dB. In particular, the electronic components are partially sealed in a housing with shielding material. The good sealing can well overcome the interference problem caused by electromagnetic leakage due to the discontinuous conductivity of the gap.
The electrical equipment comprises SF6Gas electric apparatus, SF6Mixed gas electrical equipment, environmental protection gas electrical equipment, or other insulating gas electrical equipment. The electrical equipment comprises GIS, GIL, PASS, circuit breakers, current transformers, voltage transformers, gas-filled cabinets, ring main units and the like.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a control circuit according to a first embodiment of the present invention;
FIG. 3 is a system architecture diagram according to a second embodiment of the present invention;
FIG. 4 is a system architecture diagram according to a third embodiment of the present invention;
Fig. 5 is a system architecture diagram of a fourth embodiment of the invention.
The specific implementation mode is as follows:
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a high-performance gas density transmitter for high-voltage electrical equipment according to an embodiment of the present invention, and as shown in fig. 1, a high-performance gas density transmitter for high-voltage or medium-voltage electrical equipment according to an embodiment of the present invention includes: pressure sensor 201, temperature sensor 3, intelligent microprocessor 202, equipment connector 1010, power module 203, insulating parts 204, 205, 206, pressure sensor fixing seat 207, screenHousing 208, 209, 2011, transducer housing 2010, signal wire holders 2012, and communication module 2013. As shown in fig. 2, the intelligent microprocessor 202 is connected to a pressure sensor 201 and a temperature sensor 3, respectively. Pressure P and temperature T signals are collected through the pressure sensor 201 and the temperature sensor 3, and corresponding density values P are obtained through processing of the intelligent microprocessor 202 according to gas pressure-temperature characteristics20(i.e.a pressure value P of 20 ℃ C.)20) Further realizing the on-line monitoring of the gas density value P of the electrical equipment20(or density values, pressure values, temperature values, or pressure values, temperature values). The monitored information and/or signals are uploaded to the target device through the communication module 2013, and the information comprises: gas density value P20or density values, pressure values, temperature values, or pressure values, temperature values, etc. Information, and/or signals are connected to the target device through signal line sockets 2012.
The innovation points of the technical scheme are as follows: the pressure sensor 201 is fixed on the pressure sensor fixing seat 207 through insulation members 204, 205, 206 in a sealing way. Because the pressure sensor 201 is hermetically fixed on the pressure sensor fixing seat 207 through the plurality of insulating members 204, 205, 206, and the solid insulating members 204, 205, 206 are added between the housing of the pressure sensor 201 and the pressure sensor fixing seat 207, the pressure sensor 201 can bear high system overvoltage or lightning overvoltage, and the pressure sensor is not damaged. It is very important that the insulating member 205 is a sealing member with good sealing performance, and can ensure that the pressure sensor 201 is fixed on the pressure sensor fixing seat 207 in a sealing manner, so as to form a good sealing air path. Meanwhile, a shielding piece 208 is arranged outside the insulating piece 204 of the pressure and temperature sensor shell, and the reflection and/or absorption action of the shielding piece 208 is utilized to reduce EMI electromagnetic radiation, inhibit electromagnetic coupling radiation and reduce electromagnetic leakage and interference. The shielding member 208 may be made of a material with high conductivity and magnetic permeability as an electromagnetic shielding material, and generally requires a shielding performance of 40-60 dB. For example, galvanized plates and stainless steel can be plated with nickel, so that the material with good magnetic conductivity can be adopted; copper foil and tin foil high-conductivity materials; has good shielding effect on magnetic field and electric field. Specifically, the sensor 201 and the remote transmission electronic component part 2 may be sealed in a case with the shielding materials 209 and 2011. The high-frequency-range-transmission-density relay has good sealing, well solves the problem of interference caused by electromagnetic leakage due to the discontinuous conductivity of gaps, and further improves the anti-interference level of the high-frequency-range-transmission-density relay.
As can be known from Table 1, the density transmitter adopting the technology has very good overvoltage resistance, anti-interference capability and stability, meets the high-precision requirement, and can improve the environmental adaptability of the density relay. Meanwhile, the key points are that the intelligent power grid has strong anti-interference capability and good stability, and the reliability and the accuracy of the intelligent power grid are greatly improved.
TABLE 1 contact Performance comparison Table for Density transmitters of the present patent and Prior Art
The gas density transmitter comprises an insulating part, and the pressure sensor is connected with the pressure sensor fixing seat through the insulating part; or the pressure sensor is fixed on the pressure sensor fixing seat in a sealing mode through an insulating part. Meanwhile, the insulating part 205 is a sealing part with good sealing performance, so that sealing is ensured, and overvoltage resistance of the transmitter is improved.
A shield 208 is provided on the exterior of the sensor housing to improve the tamper resistance of the density monitor. While a shield 2011 is provided on the inside (or outside) of the housing 2010 of the re-density monitor, i.e., using the reflective and/or absorptive action of the material, to reduce EMI emissions. The electronic component is partially sealed in a housing with shielding material. The good sealing can well overcome the interference problem caused by electromagnetic leakage due to the discontinuous conductivity of the gap. This can further improve the interference rejection capability of the density transmitter.
The gas density transmitter further comprises insulation disposed at the power supply (power module); alternatively, the temperature sensor is remote from the heat generating device. Alternatively, the power supply (power module) is located remotely from the temperature sensor. This allows the power supply to heat up without causing measurement errors to the temperature sensor.
The density value P20Gas density value P which can be monitored in real time20(ii) a Or the gas density value P obtained by an average value method20(ii) a Or the gas density value P obtained by correcting the trend value20. The intelligent microprocessor calculates and processes the gas density value of the electrical equipment by an average value method (mean value method) to obtain a gas density value P20Average value P of20 average. The average value method is as follows: setting collection frequency in set time interval, calculating average value of density values (N) of different time points obtained by all the collections to obtain gas density value P20Average value P of20 averageThe average value P20 averageIs the gas density value P20。
The intelligent processor automatically controls the whole monitoring process based on an embedded algorithm and a control program of an embedded system of the microprocessor, and comprises all peripherals, logic, input and output. The gas density transmitter also comprises a signal contact, a movement, a pointer and a dial, and has indicating value display; or, include a digital display device with a display. Digital display, convenient and visual reading. The outer side or the inner side of the shell of the gas density transmitter further comprises a shielding piece, and the shielding piece can play a role in shielding an electric field or a magnetic field or the electric field and the magnetic field. The pressure sensor is provided with a shield. The intelligent processor or the communication module is provided with a shielding piece; or the intelligent processor and the communication module are both provided with shielding pieces. Thus, the anti-interference capability of the transmitter is further improved.
The intelligent processor can measure relative pressure and absolute pressure type gas density transmitters. The gas density transmitter has a man-machine interaction function: the data display interface is provided, and the current data value can be refreshed in real time; the device has a data input function and can input parameter set values; the intelligent processor is provided with an interface and can finish test data storage; and/or test data derivation; and/or the test data may be printed; and/or can be in data communication with an upper computer; and/or analog quantity and digital quantity information can be input. The electrical interface of the gas density transmitter has a protection function, and the interface cannot be damaged due to misconnection; or/and will not be disturbed by electromagnetic fields. The intelligent processor also comprises a communication module, and the information such as test data and/or results is transmitted in a long distance through the communication module. The communication module can be arranged on the electronic component shell or the mechanical shell. The intelligent processor can further comprise a clock, wherein the clock is arranged on the intelligent processor and can record the test time. The control of the intelligent processor can be completed through field control, background control or mutual interaction of the field control and the background control. The gas density transmitter has the functions of real-time online density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the like.
The gas density transmitter also comprises a micro-water sensor which can monitor the micro-water value of the gas on line. The gas density transmitter also comprises a decomposition product sensor which can monitor gas decomposition products on line. Therefore, the transmitter has more complete functions and protects electrical equipment more safely.
The gas density transmitter has a self-diagnosis function and can inform abnormality in time. Such as a wire break, short alarm, sensor damage, etc. When the density of the gas density transmitter monitors that the gas pressure has a rising trend on line, an abnormal notice should be put forward in time.
By utilizing edge calculation, the density transmitter can input events such as air supplement or/and air release test and the like, and can carry out gas density value P according to corresponding events such as air supplement or/and air release test and the like20New calculations or adjustments. The density transmitter monitors the gas density value P in a certain short time20Gradually increasing to determine gas supplementing event, and according to the maximum gas density value P monitored at that time20Judging that the gas supplementing event is ended, and carrying out gas density value P20New calculations or adjustments. The density transmitter monitors the gas density value P in a certain short time20Gradually slightly decreasing, it can be judged as a gassing test (micro water or decomposition) event and can be based on the minimum gas density value P monitored at that time20If so, judging that the air discharge test event is ended, and carrying out gas density value P20New calculations or adjustments. The density transmitter can record the events such as air supply, or/and air discharge test, and the like, such as time, or/and times, or/and gas quality.
The gas density transmitter also comprises an analysis system (expert management analysis system) for detecting, analyzing and judging the gas density monitoring, the performance of the gas density transmitter and the monitoring elements. The gas density transmitter has the functions of data analysis and data processing, and can carry out corresponding fault diagnosis and prediction on electrical equipment and the gas density transmitter.
FIG. 3 is a gas density monitoring system of the invention comprised of a high performance gas density transmitter, as shown in FIG. 3, comprising: a plurality of high-voltage or medium-voltage electrical equipment provided with air chambers and a plurality of high-performance gas density transmitters are connected with a remote background detection system sequentially through a concentrator and a protocol converter; wherein, the gas density transmitter of high performance sets up respectively on the high pressure or the middling pressure electrical equipment that corresponds the gas chamber.
A gas density monitoring system comprised of a high performance gas density transmitter comprising: a plurality of high-voltage electrical equipment provided with sulfur hexafluoride gas chambers and a plurality of high-performance gas density transmitters are connected with a remote background detection system through a concentrator and an IEC61850 protocol converter in sequence; wherein, the high-performance gas density transmitter is respectively arranged on the high-voltage electrical equipment of the corresponding sulfur hexafluoride gas chamber.
The gas density monitoring system consists of a high-performance gas density transmitter, and the gas density transmitter has the functions of real-time online density value, pressure value, temperature value and other data display, change trend analysis, historical data query, real-time alarm and the like. The system has the functions of data analysis and data processing, can perform corresponding fault diagnosis and prediction on the electrical equipment, and provides technical support for the state maintenance of the electrical equipment.
As shown in fig. 3 and 4, the PC is an online monitoring background host and system, the Gateway is a network switch, the Server is an integrated application Server, the ProC is a protocol converter/online monitoring intelligent unit, the HUB is a HUB, and Z is a high-performance gas density transmitter. The online monitoring system architecture: the system diagrams of the simple architecture (fig. 3), the conventional architecture (fig. 4), the complex architecture, and the like are detailed. System architecture diagram and brief description: 1. a background software platform: based on Windows, Linux, and the like, or VxWorks, Android, Unix, UCos, FreeRTOS, RTX, embOS, MacOS. 2. Background software key business module, basic function: such as rights management, device management, data storage queries, etc.; and user management, alarm management, real-time data, historical data, real-time curves, historical curves, configuration management, data acquisition, data analysis, recording conditions, and exception handling. 3. Interface configuration: such as Form interface, Web interface, configuration interface, etc. The monitoring system can also be an architecture system diagram in a wireless transmission mode, as shown in fig. 5, a wireless module and a high-performance gas density transmitter can be integrated or separated, and the specific scheme can be flexible.
This monitoring system can real-time supervision circuit breaker, the inside SF6 gaseous temperature of electrical equipment such as GIS, pressure, density, physical quantity such as little water and its trend of change, and have communication interface, upload background system with data, realize the circuit breaker, the online monitoring function of physical quantity such as electric equipment SF6 gaseous density such as GIS, little water, and can set for the warning limit in a flexible way, inquire historical data on the spot, accurate analysis judges equipment gas leakage trend and gas leakage rate, discover abnormal conditions in advance to equipment, thereby guarantee the safe operation of electrical equipment and the whole system of transformer substation. The on-line monitoring of the electrical equipment of the transformer substation, especially an unattended station, is really realized. The method plays an important role in improving the safe operation and operation management level of a power grid system, developing prospective diagnosis and trend analysis and reducing unplanned power failure maintenance.
The gas density monitoring system is composed of high-performance gas density transmitters, and the communication modes of the high-performance gas density transmitters are wired or wireless. Wired communication modes comprise industrial buses such as RS232, RS485, CAN-BUS and the like, optical fiber Ethernet, 4-20mA, Hart, IIC, SPI, Wire, coaxial cables, PLC power carriers and the like; the wireless communication mode is that the sensor embeds 5G/NB-IOT communication module (for example 5G, NB-IOT), 2G/3G/4G/5G etc. WIFI, bluetooth, Lora, loraan, Zigbee, infrared, ultrasonic wave, sound wave, satellite, light wave, quantum communication, sonar etc. upload various sensor data to thing networking cloud platform. The hub adopts an RS485 hub, and the IEC61850 protocol converter is also respectively connected with the network service printer and the network data router.
The invention provides a high-performance gas density transmitter for high-voltage and medium-voltage electrical equipment or a monitoring system composed of the same, which can overcome the defect that a mechanical SF6 gas density relay cannot accurately monitor SF of the electrical equipment6The gas density problem can be solved, and the problems of large investment and inconvenient site construction can be solved. The accurate information of gas leakage can be informed to operation and maintenance personnel in time, the gas leakage problem is handled in time, the safety performance is improved, the operation and maintenance cost is reduced, and the safe operation of a power grid is guaranteed. At the same time, SF can be greatly reduced6Gas is discharged, and the environment is protected.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (21)
1. An overvoltage-resistant gas density transmitter is characterized by comprising a shell, a pressure sensor fixing seat, a temperature sensor, an intelligent processor, a communication module, a connecting joint and a power supply, wherein the pressure sensor, the pressure sensor fixing seat, the temperature sensor, the intelligent processor, the communication module, the connecting joint and the power supply are arranged in the shell; the intelligent processor is respectively connected with the temperature sensor, the pressure sensor and the communication module; the intelligent processor collects pressure signals through the pressure sensor and collects temperature through the temperature sensorThe signal is processed by an intelligent processor according to the gas pressure-temperature characteristic to obtain a corresponding density value P20and remotely transmitting the density value P through the communication module20Or the density value, the pressure value and the temperature value, or the pressure value and the temperature value, so as to realize online monitoring of the gas density value, or the density value, the pressure value and the temperature value, or the pressure value and the temperature value of the electrical equipment; the pressure sensor is characterized in that the pressure sensor is fixed on the pressure sensor fixing seat in a sealing mode through a plurality of insulating parts, and the shell of the pressure sensor is insulated from the pressure sensor fixing seat.
2. An overvoltage resistant gas density transmitter as claimed in claim 1 further including an electric field shield disposed outside the pressure sensor and/or electronic component portion.
3. The overvoltage resistant gas density transmitter of claim 1, further comprising a magnetic field shield disposed outside the pressure sensor and/or electronics portion.
4. The overvoltage resistant gas density transmitter of claim 1 further including insulation disposed at the power supply; alternatively, the temperature sensor is remote from the power source.
5. The overvoltage resistant gas density transmitter of claim 1 wherein the intelligent processor carries embedded microprocessor based algorithms and control programs.
6. An overvoltage resistant gas density transmitter as claimed in claim 1 further including an indication display including signal contacts, a movement, a pointer and a dial or including a digital display device.
7. The overvoltage resistant gas density transmitter of claim 1 wherein the housing further includes electromagnetic shielding on the outside or inside.
8. The overvoltage resistant gas density transmitter of claim 1, wherein the smart processor and/or communication module is provided with shielding.
9. The overvoltage resistant gas density transmitter of claim 1, wherein the intelligent processor is adapted to measure both relative pressure and absolute pressure types of gas density transmitters.
10. The overvoltage resistant gas density transmitter of claim 1, wherein the gas density transmitter has a human machine interface: the method comprises the steps of providing a data display interface, and refreshing a current data value in real time; has data input and parameter set value input boxes.
11. the overvoltage resistant gas density transmitter of claim 1 wherein the electrical interface of the gas density transmitter is provided with protection against misconnection and electromagnetic interference.
12. The overvoltage resistant gas density transmitter of claim 1 wherein the intelligent processor enables remote transmission of test data and/or results via the communication module; the communication module is arranged on the electronic component shell or the mechanical shell.
13. The overvoltage resistant gas density transmitter of claim 1 further including a clock, the clock being loaded on the intelligent processor to record the test time.
14. The overvoltage resistant gas density transmitter of claim 1 wherein the intelligent processor is controlled by either field control or background control or both.
15. The overvoltage resistant gas density transmitter of claim 1 further including a micro water sensor for on-line monitoring of gas micro water values.
16. The overvoltage resistant gas density transmitter of claim 1 further including a analyte sensor capable of on-line monitoring of gas analytes.
17. The overvoltage resistant gas density transmitter of claim 1 further including an expert management analysis system for detecting, analyzing and evaluating the gas density monitoring, gas density transmitter performance, and monitoring components.
18. The overvoltage resistant gas density transmitter of claim 1 further including a plurality of insulators through which said pressure sensor is insulated from said housing and said connector; and the housing of the pressure sensor and the housing of the gas density transmitter are insulated from each other.
19. A gas density monitoring system comprised of the overvoltage resistant gas density transmitter, comprising: the overvoltage-resistant gas density transmitters are connected with a remote background detection system sequentially through the concentrator and the protocol converter; the overvoltage-resistant gas density transmitters are respectively arranged on the electrical equipment of the corresponding gas chambers.
20. The gas density monitoring system of claim 19, wherein the protocol converter is an IEC61850 or 104 protocol converter.
21. A gas density monitoring system consisting of said overvoltage resistant gas density transmitter according to claim 19, wherein the hub is an RS485 hub and the IEC61850 protocol converter or 104 protocol converter is further connected to the network service printer and the network data router, respectively.
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Cited By (1)
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