CN112051470A - Transformer substation switch cabinet state on-line monitoring system based on big data - Google Patents
Transformer substation switch cabinet state on-line monitoring system based on big data Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention discloses a transformer substation switch cabinet state online monitoring system based on big data, which can monitor state information of a switch cabinet group of a transformer substation such as temperature, partial discharge, opening and closing current and voltage, vibration and the like in real time on line and has a perfect and reliable structure. The intelligent on-site display system comprises state acquisition assemblies arranged in each group of switch cabinets, on-site display instrument assemblies used for on-site processing and transmitting data of the state acquisition assemblies, and remote big data assemblies used for receiving data of the on-site display instrument assemblies of all the switch cabinets; the state acquisition assembly is in wireless communication with a radio frequency wireless receiving module of the local display instrument assembly through a radio frequency wireless transmitting module; the local display instrument component is in wireless communication with the ZigBee coordinator of the remote big data component through the ZigBee terminal; the remote big data assembly further comprises a signal preprocessing module connected with the ZigBee coordinator, the signal preprocessing module is connected with the data storage module, the data storage module is connected with the cloud computing processing module, and the cloud computing processing module is connected with the display and alarm module.
Description
Technical Field
The invention relates to an online monitoring system for a transformer substation switch cabinet, in particular to a real-time monitoring system for state parameters of the transformer substation switch cabinet based on big data.
Background
The switch cabinet is used for power generation, power transmission, power distribution, electric energy conversion and consumption of an electric power system and plays roles of on-off, control or protection and the like, the switch cabinet runs under high voltage and high load, elements can be aged for a long time, fire disasters are caused, and the like, and the switch cabinet causes great loss when being found by maintainers. In the long-term operation process of a switch cabinet of a transformer substation, the contact points of the switch, the bus connection parts and other parts generate heat due to aging or overlarge contact resistance, and some heating parts are shielded by glass, a cabinet door and other shielding objects, so that the temperatures of the contact points cannot be monitored by using a universal infrared imager, and finally accidents are caused. Besides temperature detection, regular inspection can be carried out on the existing switch cabinet, inspection items comprise regular partial discharge tests, regular opening and closing current and voltage detection and the like, the switch cabinet also has a certain self-monitoring function, and monitoring results are displayed through a display control panel of the switch cabinet; therefore, in the prior art, the detection items of the switch cabinet are required to be more, most of the detection items are field detection at present, regular inspection or temporary inspection and inspection are required, the detection process cannot be monitored at any time, remote control cannot be carried out, a large amount of work is increased for operation and maintenance personnel, and meanwhile, the hidden trouble of missed inspection also exists.
Therefore, the transformer substation switch cabinet state online monitoring system based on big data is used for solving the problems.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and the transformer substation switch cabinet state online monitoring system based on the big data is provided, can monitor state information such as temperature, partial discharge, opening and closing current and voltage, vibration and the like of a switch cabinet group of a transformer substation online in real time, is perfect and reliable in structure, can realize remote big data analysis and monitoring, reduces operation and maintenance workload, improves the management level of the switch cabinet, and ensures stable operation and timely feedback of faults of the switch cabinet.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the on-line monitoring system for the state of the switch cabinets of the transformer substation based on the big data comprises a plurality of groups of switch cabinets; the intelligent on-site display system comprises state acquisition assemblies arranged in each group of switch cabinets, on-site display instrument assemblies used for on-site processing and transmitting data of the state acquisition assemblies, and remote big data assemblies used for receiving data of the on-site display instrument assemblies of all the switch cabinets;
the state acquisition assembly is in wireless communication with a radio frequency wireless receiving module of the local display instrument assembly through a radio frequency wireless transmitting module; the local display instrument assembly is in wireless communication with a ZigBee coordinator of the remote big data assembly through a ZigBee terminal; the remote big data assembly also comprises a signal preprocessing module connected with the ZigBee coordinator, the signal preprocessing module is connected with a data storage module, the data storage module is connected with a cloud computing processing module, and the cloud computing processing module is connected with a display and alarm module;
the state acquisition module comprises a sensor assembly arranged on the switch cabinet, the sensor assembly is respectively connected with the signal conversion processing module through the signal conditioning circuit module, and the signal conversion processing module is connected to the radio frequency wireless transmission module; the sensor assembly comprises an acceleration sensor, a voltage transformer, a Hall current sensor, an SAW temperature sensor, an ultrasonic sensor, a transient ground voltage sensor, an ultrahigh frequency sensor and a video acquisition device; correspondingly, the signal conditioning circuit comprises an acceleration signal acquisition conditioning circuit, a voltage and current signal acquisition conditioning circuit, a temperature signal acquisition conditioning circuit, a partial discharge signal acquisition conditioning circuit and a video signal conditioning circuit which correspond to the sensor assembly;
the video acquisition device is fixed outside the switch cabinet through a camera support and is installed towards a display indication panel of the switch cabinet; the SAW temperature sensor is fixedly arranged in the switch cabinet through a temperature sensor bracket; the acceleration sensor is fixed in the switch cabinet through a magnetic mounting seat;
the on-site display instrument assembly also comprises an FPGA unit which is in control connection with the radio frequency wireless receiving module; the FPGA unit is also connected with a processor, and the processor comprises a memory; the processor is also in control connection with a touch screen human-computer interface and a ZigBee terminal; the in-situ display instrument assembly further comprises a power module with a charging system for supplying power to the FPGA unit and the processor.
As a preferred embodiment of the present invention: the partial discharge signal acquisition conditioning circuit comprises a filtering unit, an amplifying unit and a detecting unit which are connected in sequence; in the signal conditioning circuit, a signal conversion processing module corresponding to the partial discharge signal acquisition conditioning circuit is a local signal processing unit, and the other signal conversion processing modules are A/D module conversion circuits.
As a preferred embodiment of the present invention: the camera support comprises an assembling stand column, an assembling sleeve is sleeved on the assembling stand column, a plurality of movable joints are assembled on the side face of the assembling sleeve, the movable joints are X-shaped, the two sides of each movable joint are butt joint sleeves, the butt joint sleeves of the two adjacent movable joints are hinged through a hinge shaft, an upper swing frame and a lower swing frame are hinged and installed on the movable joint at the tail end, a fixed installation fixing frame is fixedly installed on the upper swing frame and the lower swing frame, and the fixing frame is fixedly connected with a camera of the video acquisition device through a fixing hole.
As a preferred embodiment of the present invention: the number of the camera supports is multiple.
As a preferred embodiment of the present invention: the temperature sensor support comprises an assembly table for fixing the temperature sensor, a rotating shaft is arranged on one surface of the assembly table, which is far away from the temperature sensor, a radially extending positioning plate is arranged on the rotating shaft, and an arc-shaped positioning groove is formed in the center of the positioning plate; the two sides of the positioning plate are hanging lugs bent towards the assembling table, and the positioning plate further comprises hanging springs which are used for surrounding the fixing piece and then hung on the hanging lugs through hanging rings at the two ends.
As a preferred embodiment of the present invention: the magnetic mounting seat comprises two circular magnetic bottom plates, and the bottom of each magnetic bottom plate is provided with uniformly distributed magnets; the magnetic bottom plate mounting device further comprises a mounting platform used for connecting the two magnetic bottom plates, and two sides of the mounting platform are fixed with the magnetic bottom plates through L-shaped connecting parts and assembling bolts; and the center of the mounting platform is provided with a mounting hole for fixing the acceleration sensor.
As a preferred embodiment of the present invention: the SAW temperature sensors are distributed in each independent space in the switch cabinet; the number of the SAW temperature sensors arranged in each independent space is 12; each switch cabinet is also internally provided with at least two collectors for collecting the SAW temperature sensor signals; each collector outputs 3 antenna signals, and each collector reads 18 sensor signals; the sensing temperature range of the SAW temperature sensor is-50-200 ℃.
As a preferred embodiment of the present invention: the magnet is a permanent magnet; the number of magnets of each magnetic bottom plate is 12; coating a layer of insulating paint on the surface of the magnet; the acceleration sensor is an ICP sensor and adopts a constant current source power supply mode to supply power.
As a preferred embodiment of the present invention: the type of a processor of the local display instrument is stm32f103 and tms320f280, and the alternating current transformer adopts SCT 006; the Hall current sensor adopts HST 016L; the acceleration sensor is AD50T-T or AD 1000T.
As a preferred embodiment of the present invention: and the cloud computing processing module is also connected with the power grid online monitoring center.
The invention has the beneficial effects that:
the invention discloses a big data-based on-line monitoring system for the state of a transformer substation switch cabinet, which comprises a state acquisition assembly, an on-site display instrument assembly and a far-end big data assembly, wherein the state acquisition assembly is arranged in each group of switch cabinets; the state acquisition assembly is used for acquiring state information of the switch cabinet in real time, the local display instrument assembly is used for transmission of a field data processing box, and the remote big data assembly is used for remote big data calculation and remote monitoring, so that the switch cabinet of the whole transformer substation can be centralized and monitored in real time;
in order to realize reliable operation extension and construction of the whole system, the invention adopts a wireless transmission technology to realize radio frequency communication between the state acquisition assembly and the local display instrument, wireless communication between the local display instrument and the remote big data based on ZigBee, and a new innovative design of a wireless mode.
The remote big data assembly also comprises a signal preprocessing module connected with the ZigBee coordinator, wherein the signal preprocessing module is connected with a data storage module, the data storage module is connected with a cloud computing processing module, and the cloud computing processing module is connected with a display and alarm module; the remote big data assembly realizes fault analysis, diagnosis and display and fault alarm based on a cloud computing scheme of big data, so that the remote big data assembly is more intelligent, scientific, accurate and reliable compared with a traditional manual judgment mode.
The state acquisition module comprises a sensor assembly arranged on a switch cabinet, the sensor assembly is respectively connected with a signal conversion processing module through a signal conditioning circuit module, and the signal conversion processing module is connected to the radio frequency wireless transmission module; the sensor assembly comprises an acceleration sensor, a voltage transformer, a Hall current sensor, an SAW temperature sensor, an ultrasonic sensor, a transient ground voltage sensor, an ultrahigh frequency sensor and a video acquisition device; correspondingly, the signal conditioning circuit comprises an acceleration signal acquisition conditioning circuit, a voltage and current signal acquisition conditioning circuit, a temperature signal acquisition conditioning circuit, a partial discharge signal acquisition conditioning circuit and a video signal conditioning circuit which correspond to the sensor assembly; the vibration information is collected in real time through the acceleration sensor, the opening and closing voltage and current are collected in real time through the voltage transformer and the Hall current sensor, the temperature in the cabinet is collected through the SAW temperature sensor, partial discharge information is collected more accurately and comprehensively through the ultrasonic sensor, the transient voltage and voltage sensor and the ultrahigh frequency sensor, and the self-owned state information on the display control panel of the switch cabinet is collected through the video collecting device. Therefore, the invention has very comprehensive acquisition amount, and each path of acquired signals are accurately and reliably transmitted to a field on-site display instrument through the radio frequency wireless transmitting module after being processed and converted;
the temperature sensor adopts the SAW temperature sensor, the SAW sensor adopts a passive sensing mode, battery driving is not needed, maintenance cost caused by battery replacement is reduced, and meanwhile, the ecological environment is not influenced. The wireless temperature sampling mode does not need to connect wires on a measured point or a related supporting structure, and no electrical connection exists between the sensor and the receiving equipment, so that high-voltage isolation is realized, and the safe operation of the equipment is guaranteed. The passive wireless temperature sensor is small in size, and data are transmitted wirelessly with the collector, so that the installation is convenient and flexible, and the influence of the structure and the space of the switch cabinet is avoided. The temperature sensor is corrected by matching software to compensate the deviation in the sensor manufacturing process. The sensor can be debugged at any temperature within the working temperature range and cannot be influenced by seasonal factors. Typically, the sensor is only commissioned once after installation and remains uncorrected for many years. Meanwhile, environmental factors such as dust accumulation and the like cannot influence the temperature measurement of the SAW sensor. The passive and wireless working mode greatly reduces the installation and maintenance cost of the system.
The video acquisition device is fixed outside the switch cabinet through the camera bracket and is installed towards the display indication panel of the switch cabinet; the bracket adjusts the angle of the video acquisition device and ensures accurate picture transmission, the acceleration sensor is fixed in the switch cabinet through the magnetic mounting seat, and the magnetic mounting seat does not damage the structure in the switch cabinet, so that the damage of an additional mounting structure is ensured, and the original reliability of the switch cabinet is not influenced; the in-situ display instrument assembly also comprises an FPGA unit which is in control connection with the radio frequency wireless receiving module; the FPGA unit is also connected with a processor, and the processor comprises a memory; the processor is also in control connection with a touch screen human-computer interface and a ZigBee terminal; the FPGA unit is used as a controller, received state information is processed by the processor and then temporarily stored in the memory, and the FPGA unit can be controlled and checked on site through the touch screen. The in-situ display instrument assembly also comprises a power supply module with a charging system for supplying power to the FPGA unit and the processor. Because the signal acquisition does not necessarily need to be acquired in real time, the signal acquisition can be intermittently acquired and temporarily awakened, and the power consumption is very low when the signal is not acquired at ordinary times, the power module with the charging system used by the invention can be periodically charged and used for a long time, and the trouble of independently connecting a power line on site is avoided.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram illustrating a front end module according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of one embodiment of a magnetic mount of the present invention;
FIG. 4 is a schematic structural view of a preferred embodiment of the magnetic mount of the present invention;
FIG. 5 is a schematic structural diagram of one embodiment of a camera mount of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of a temperature sensor mounting base according to the present invention.
Description of reference numerals:
1-the 1 st group of switch cabinets, 2-the Nth group of switch cabinets, 3-a state acquisition assembly, 4-an on-site display instrument assembly, 5-a far-end big data assembly, 6-a ZigBee coordinator, 7-a signal preprocessing module, 8-a data storage module, 9-a cloud computing processing module and 10-a display and alarm module; 101-magnetic bottom plate, 102-mounting platform, 103-mounting hole, 104-assembling bolt, 105-magnet; 201-assembling upright posts, 204-upper and lower swing frames, 205-articulated shafts, 206-fixed frames, 207-fixed holes, 208-assembling sleeves, 209-movable joints and 210-butt joint sleeves; 301-assembly table, 302-rotating shaft, 303-hanging plate, 304-hanging lug, 305-hanging spring, 306-hanging ring, 307-positioning plate and 308-positioning groove.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
as shown in fig. 1 to 6, which illustrate specific embodiments of the present invention, as shown in the drawings, in the transformer substation switch cabinet state online monitoring system based on big data disclosed in the present invention, there are multiple groups of switch cabinets; the intelligent on-site display system comprises state acquisition components 3 arranged in each group of switch cabinets, an on-site display instrument component 4 used for on-site processing and transmitting data of the state acquisition components, and a far-end big data component 5 used for receiving data of the on-site display instrument components 4 of all the switch cabinets;
the state acquisition component 3 is in wireless communication with a radio frequency wireless receiving module of the local display component 4 through a radio frequency wireless transmitting module; the local display instrument component 4 is in wireless communication with the ZigBee coordinator of the remote big data component 5 through the ZigBee terminal; the remote big data assembly 5 further comprises a signal preprocessing module connected with the ZigBee coordinator, the signal preprocessing module is connected with a data storage module, the data storage module is connected with a cloud computing processing module, and the cloud computing processing module is connected with a display and alarm module;
the state acquisition module 3 comprises a sensor assembly arranged on the switch cabinet, the sensor assembly is respectively connected with a signal conversion processing module through a signal conditioning circuit module, and the signal conversion processing module is connected to the radio frequency wireless transmission module; the sensor assembly comprises an acceleration sensor, a voltage transformer, a Hall current sensor, an SAW temperature sensor, an ultrasonic sensor, a transient ground voltage sensor, an ultrahigh frequency sensor and a video acquisition device; correspondingly, the signal conditioning circuit comprises an acceleration signal acquisition conditioning circuit, a voltage and current signal acquisition conditioning circuit, a temperature signal acquisition conditioning circuit, a partial discharge signal acquisition conditioning circuit and a video signal conditioning circuit which correspond to the sensor assembly;
the video acquisition device is fixed outside the switch cabinet through a camera support and is installed towards a display indication panel of the switch cabinet; the SAW temperature sensor is fixedly arranged in the switch cabinet through a temperature sensor bracket; the acceleration sensor is fixed in the switch cabinet through a magnetic mounting seat;
the on-site display instrument assembly also comprises an FPGA unit which is in control connection with the radio frequency wireless receiving module; the FPGA unit is also connected with a processor, and the processor comprises a memory; the processor is also in control connection with a touch screen human-computer interface and a ZigBee terminal; the in-situ display instrument assembly further comprises a power module with a charging system for supplying power to the FPGA unit and the processor.
Preferably, as shown in fig. 2: the partial discharge signal acquisition conditioning circuit comprises a filtering unit, an amplifying unit and a detecting unit which are connected in sequence; in the signal conditioning circuit, a signal conversion processing module corresponding to the partial discharge signal acquisition conditioning circuit is a local signal processing unit, and the other signal conversion processing modules are A/D module conversion circuits. This embodiment has designed specific signal conditioning structure to the signal acquisition conditioning circuit is put in the office, and the office is put the signal and is transmitted after filtering, enlargies and the detection, has ensured the reliable collection of office and has been sent, and the comprehensive collection mode of signal is put in the cooperation office in the field, and the office of this embodiment is put and is gathered the function comprehensively, and the signal is accurate, and monitoring process and result are very reliable.
Preferably, as shown in fig. 5: the camera support comprises an assembly upright column 201, an assembly sleeve 208 is sleeved on the assembly upright column 201, a plurality of movable joints 209 are assembled on the side surface of the assembly sleeve 208, the movable joints 209 are X-shaped, the two sides of each movable joint are butt joint sleeves 210, the butt joint sleeves 210 of the two adjacent movable joints are hinged through hinge shafts (205), an upper swinging frame 204 and a lower swinging frame 204 are hinged on the movable joint at the tail end, a fixed frame 206 is fixedly installed on the upper swinging frame 204 and the lower swinging frame 204, and the fixed frame 206 is fixedly connected with a camera of a video acquisition device through a fixed hole 207. The embodiment discloses the preferred embodiment of camera support, considers that the camera changes in the video acquisition of focus position, consequently this embodiment has designed specially can the left back rotation with the very convenient supporting structure of luffing motion, so alright with the different video acquisition positions of freely adjusting different cubical switchboard, guaranteed to transmit to the accurate reliable of the video signal of distal end.
Preferably, as shown in fig. 5: the number of the camera supports is multiple. Set up the information that a plurality of camera supports can monitor different positions simultaneously.
Preferably, as shown in fig. 6: the temperature sensor support comprises an assembly table 301 for fixing the temperature sensor, a rotating shaft 302 is installed on one surface, away from the temperature sensor, of the assembly table 301, a positioning plate 307 extending in the radial direction is installed on the rotating shaft 302, and an arc-shaped positioning groove 308 is formed in the center of the positioning plate 307; the positioning plate 307 has hanging lugs 304 bent toward the assembly table at both sides thereof, and further includes hanging springs 305 for surrounding the fixing member and hanging on the hanging lugs 304 through hanging rings 306 at both ends thereof. The flexible temperature sensor support is designed aiming at the distributed installation of the temperature sensor, the binding of the supports with different specifications is realized through the hanging spring, the hanging installation of the whole temperature sensor is realized through hanging the supports on the hanging lugs after the binding, the hanging mode is very flexible, and the dismounting process is very quick; the hanging structure of the embodiment is more innovative, and the hanging spring is adopted to adapt to hanging positions of different specifications, and is generally hung on an internal bracket; this embodiment still makes to articulate through the arc constant head tank and can carry out partial surface matching through the arc constant head tank when on supports such as post, increases area of contact, increases and articulates the reliability.
Preferably, as shown in fig. 3 and 4: the magnetic mounting seat comprises two circular magnetic bottom plates 101, and the bottom of each magnetic bottom plate 101 is provided with uniformly distributed magnets 105; the magnetic bottom plate mounting device further comprises a mounting platform 102 for connecting the two magnetic bottom plates 101, wherein two sides of the mounting platform 102 are fixed with the magnetic bottom plates 101 through L-shaped connecting parts and assembling bolts 104; the center of the mounting platform is provided with a mounting hole 103 for fixing the acceleration sensor. The embodiment discloses a preferred embodiment of a magnetic mounting seat, which adsorbs the inner wall of a switch cabinet through a magnet of a magnetic bottom plate, is very convenient to assemble and is also very suitable for the structure of an acceleration sensor; the mounting platform is designed in the embodiment through new innovation, so that the acceleration sensor is overhead, reliable collection is guaranteed, the mounting position of the acceleration sensor is more independent, and the acceleration sensor is convenient to detach, check and maintain. Before, when the acceleration sensor is additionally arranged on the electrical equipment, the acceleration sensor cannot be detached due to long-term use when the acceleration sensor is attached to the surface of the electrical equipment, and the acceleration sensor is corroded (due to long-term non-ventilation and damp).
Preferably, as shown in fig. 2: the SAW temperature sensors are distributed in each independent space in the switch cabinet; the number of the SAW temperature sensors arranged in each independent space is 12; each switch cabinet is also internally provided with at least two collectors for collecting the SAW temperature sensor signals; each collector outputs 3 antenna signals, and each collector reads 18 sensor signals; the sensing temperature range of the SAW temperature sensor is-50-200 ℃. The structure disclosed by the embodiment enables the SAW temperature sensors to be more reasonably and comprehensively distributed, so that each independent space can reliably collect temperature, and generally, the independent space comprises but is not limited to a bus chamber, a main switch chamber and a cable chamber; the structure of the collector can enable a large number of temperature signals to be shot and collected at the first time and then processed by the subsequent temperature signal conditioning circuit.
Preferably, as shown in fig. 3 and 4: the magnet is a permanent magnet; the number of magnets 105 per magnetic base 101 is 12; coating a layer of insulating paint on the surface of the magnet 105; the acceleration sensor is an ICP sensor and adopts a constant current source power supply mode to supply power. The insulating paint coating ensures reliable insulation. The constant current source supplies power to enable the power supply structure to be stable, and the durability of the acceleration sensor is improved.
Preferably, as shown in fig. 2: the type of a processor of the local display instrument is stm32f103 and tms320f280, and the alternating current transformer adopts SCT 006; the Hall current sensor adopts HST 016L; the acceleration sensor is AD50T-T or AD 1000T.
Preferably, as shown in fig. 1: and the cloud computing processing module is also connected with the power grid online monitoring center. The monitoring center which can link the power grid online monitoring center can control the whole network condition, and is beneficial to monitoring in a wider range and more reliable monitoring.
While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The on-line monitoring system for the state of the switch cabinets of the transformer substation based on the big data comprises a plurality of groups of switch cabinets; the intelligent control system is characterized by comprising state acquisition components arranged in each group of switch cabinets, on-site display instrument components used for on-site processing and transmitting data of the state acquisition components, and remote big data components used for receiving data of the on-site display instrument components of all the switch cabinets;
the state acquisition assembly is in wireless communication with a radio frequency wireless receiving module of the local display instrument assembly through a radio frequency wireless transmitting module; the local display instrument assembly is in wireless communication with a ZigBee coordinator of the remote big data assembly through a ZigBee terminal; the remote big data assembly also comprises a signal preprocessing module connected with the ZigBee coordinator, the signal preprocessing module is connected with a data storage module, the data storage module is connected with a cloud computing processing module, and the cloud computing processing module is connected with a display and alarm module;
the state acquisition module comprises a sensor assembly arranged on the switch cabinet, the sensor assembly is respectively connected with the signal conversion processing module through the signal conditioning circuit module, and the signal conversion processing module is connected to the radio frequency wireless transmission module; the sensor assembly comprises an acceleration sensor, a voltage transformer, a Hall current sensor, an SAW temperature sensor, an ultrasonic sensor, a transient ground voltage sensor, an ultrahigh frequency sensor and a video acquisition device; correspondingly, the signal conditioning circuit comprises an acceleration signal acquisition conditioning circuit, a voltage and current signal acquisition conditioning circuit, a temperature signal acquisition conditioning circuit, a partial discharge signal acquisition conditioning circuit and a video signal conditioning circuit which correspond to the sensor assembly;
the video acquisition device is fixed outside the switch cabinet through a camera support and is installed towards a display indication panel of the switch cabinet; the SAW temperature sensor is fixedly arranged in the switch cabinet through a temperature sensor bracket; the acceleration sensor is fixed in the switch cabinet through a magnetic mounting seat;
the on-site display instrument assembly also comprises an FPGA unit which is in control connection with the radio frequency wireless receiving module; the FPGA unit is also connected with a processor, and the processor comprises a memory; the processor is also in control connection with a touch screen human-computer interface and a ZigBee terminal; the in-situ display instrument assembly further comprises a power module with a charging system for supplying power to the FPGA unit and the processor.
2. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the partial discharge signal acquisition conditioning circuit comprises a filtering unit, an amplifying unit and a detecting unit which are connected in sequence; in the signal conditioning circuit, a signal conversion processing module corresponding to the partial discharge signal acquisition conditioning circuit is a local signal processing unit, and the other signal conversion processing modules are A/D module conversion circuits.
3. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the camera support comprises an assembling stand column, an assembling sleeve is sleeved on the assembling stand column, a plurality of movable joints are assembled on the side face of the assembling sleeve, the movable joints are X-shaped, the two sides of each movable joint are butt joint sleeves, the butt joint sleeves of the two adjacent movable joints are hinged through a hinge shaft, an upper swing frame and a lower swing frame are hinged and installed on the movable joint at the tail end, a fixed installation fixing frame is fixedly installed on the upper swing frame and the lower swing frame, and the fixing frame is fixedly connected with a camera of the video acquisition device through a fixing hole.
4. The big-data-based online monitoring system for substation switch cabinets of claim 3, wherein: the number of the camera supports is multiple.
5. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the temperature sensor support comprises an assembly table for fixing the temperature sensor, a rotating shaft is arranged on one surface of the assembly table, which is far away from the temperature sensor, a radially extending positioning plate is arranged on the rotating shaft, and an arc-shaped positioning groove is formed in the center of the positioning plate; the two sides of the positioning plate are hanging lugs bent towards the assembling table, and the positioning plate further comprises hanging springs which are used for surrounding the fixing piece and then hung on the hanging lugs through hanging rings at the two ends.
6. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the magnetic mounting seat comprises two circular magnetic bottom plates, and the bottom of each magnetic bottom plate is provided with uniformly distributed magnets; the magnetic bottom plate mounting device further comprises a mounting platform used for connecting the two magnetic bottom plates, and two sides of the mounting platform are fixed with the magnetic bottom plates through L-shaped connecting parts and assembling bolts; and the center of the mounting platform is provided with a mounting hole for fixing the acceleration sensor.
7. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the SAW temperature sensors are distributed in each independent space in the switch cabinet; the number of the SAW temperature sensors arranged in each independent space is 12; each switch cabinet is also internally provided with at least two collectors for collecting the SAW temperature sensor signals; each collector outputs 3 antenna signals, and each collector reads 18 sensor signals; the sensing temperature range of the SAW temperature sensor is-50-200 ℃.
8. The big-data-based online monitoring system for substation switch cabinets of claim 6, wherein: the magnet is a permanent magnet; the number of magnets of each magnetic bottom plate is 12; coating a layer of insulating paint on the surface of the magnet; the acceleration sensor is an ICP sensor and adopts a constant current source power supply mode to supply power.
9. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: the type of a processor of the local display instrument is stm32f103 and tms320f280, and the alternating current transformer adopts SCT 006; the Hall current sensor adopts HST 016L; the acceleration sensor is AD50T-T or AD 1000T.
10. The big-data-based online monitoring system for substation switch cabinets according to claim 1, wherein: and the cloud computing processing module is also connected with the power grid online monitoring center.
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