Intelligent construction site anti-electromagnetic interference intelligent monitoring system suitable for transformer substation environment

Abstract

An intelligent construction site anti-electromagnetic interference intelligent monitoring system suitable for a transformer substation environment comprises an explosion-proof monitoring unit, an industrial-grade anti-interference algorithm box and a field control terminal. The explosion-proof monitoring unit is used as front-end data acquisition equipment and is connected with the industrial-grade anti-interference algorithm box through the industrial-grade optical fiber ring network, and the industrial-grade anti-interference algorithm box is connected with the field control terminal through double network ports; the explosion-proof monitoring unit comprises an explosion-proof shell, and a dual-spectrum imaging module, a lightning protection module, an optical fiber transceiver and an explosion-proof wiring cavity which are positioned in the explosion-proof shell; the industrial-grade anti-interference algorithm box comprises an electromagnetic shielding shell, and a heat dissipation system, an anti-interference power supply, a communication module and an industrial Ethernet interface which are located in the electromagnetic shielding shell. According to the utility model, the technical problems of poor stability, insufficient protection and the like of monitoring equipment in the high-voltage environment of the transformer substation are solved, and all-weather reliable monitoring is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of power facility safety monitoring, and particularly relates to an intelligent monitoring system applied to a strong electromagnetic interference environment such as a transformer substation. BACKGROUND

[0002] The existing transformer substation construction site monitoring system mainly has the following problems: first, conventional monitoring equipment is generally used, and these devices are susceptible to strong electromagnetic field interference in the high-voltage environment of a transformer substation. Due to the lack of effective electromagnetic shielding measures, image distortion, signal interruption and other faults often occur, which cannot meet the monitoring requirements of the transformer substation construction site. Second, the protection level of the existing monitoring equipment is low, and ordinary protective shells are mostly used. These devices are exposed to outdoor environments and are susceptible to damage due to factors such as dust, rain, high temperature, high maintenance costs, and short service life. Frequent failures of monitoring equipment in high-voltage transformer substation environments not only increase maintenance costs but also affect the effectiveness of construction safety management. Third, the power supply scheme is single, and most monitoring systems rely on mains power. When power failure, power outage and other situations occur during the construction of a transformer substation, the monitoring system also stops working, forming a monitoring blind area. At the same time, the system generally lacks lightning protection measures and is susceptible to lightning damage in rainy weather, seriously affecting the reliability of the system. Therefore, there is an urgent need for a monitoring system that can adapt to the special environment of a transformer substation and has perfect protection functions. This system should solve the problems of electromagnetic interference, insufficient protection, poor power supply reliability and other problems in the existing technology to ensure stable operation in complex environments.

[0003] Therefore, there is an urgent need in the art for a monitoring system that can adapt to the special environment of a transformer substation and has perfect protection functions. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is how to solve the problems of electromagnetic interference and insufficient protection of monitoring equipment in the high-voltage environment of a transformer substation, ensure stable operation of the system in complex environments, and provide an anti-electromagnetic interference intelligent monitoring system for transformer substation environments.

[0005] The technical solution of the utility model is specifically:

[0006] The intelligent monitoring system for preventing electromagnetic interference in a smart construction site suitable for a transformer substation environment comprises an explosion-proof monitoring unit, an industrial-grade anti-interference algorithm box and a field control terminal. The explosion-proof monitoring unit serves as a front-end data acquisition device and is connected to the industrial-grade anti-interference algorithm box through an industrial-grade optical fiber ring network. The industrial-grade anti-interference algorithm box is connected to the field control terminal through double network ports.

[0007] The explosion-proof monitoring unit comprises an explosion-proof shell and a double-spectrum imaging module, a lightning protection module, an optical fiber transceiver and an explosion-proof wiring cavity located in the explosion-proof shell.

[0008] The industrial-grade anti-interference algorithm box comprises an electromagnetic shielding shell and a heat dissipation system, an anti-interference power supply, a communication module and an industrial Ethernet interface located in the electromagnetic shielding shell.

[0009] The structure of the on-site control terminal comprises an industrial control host connected with an explosion-proof display unit, an uninterruptible power supply, a relay control module and an audible and visual alarm device.

[0010] The lightning protection module adopts a three-stage protection structure: the first stage adopts a 20KA gas discharge tube; the second stage adopts a 10KA pressure-sensitive resistor; and the third stage adopts a 400W TVS tube.

[0011] The electromagnetic shielding shell is made of aluminum alloy material, and the electromagnetic shielding shell is lined with three layers of electromagnetic shielding nets: the outer layer is a 0.5mm galvanized steel plate, the middle layer is a 0.3mm nickel net, and the inner layer is a 0.2mm copper net.

[0012] The explosion-proof monitoring unit is installed on a support with a height of 2000-2500mm, and a shock absorption structure and an angle locking mechanism are arranged on the support.

[0013] The explosion-proof monitoring unit is connected with an industrial-grade optical fiber ring network through an optical fiber transceiver.

[0014] The system solves the technical problems of poor stability and insufficient protection of monitoring equipment in a high-voltage environment of a transformer substation through special hardware protection design, linkage mechanism and power supply protection scheme, and realizes reliable all-weather monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic diagram of the anti-electromagnetic interference intelligent monitoring system for the transformer substation environment of the utility model.

[0016] Figure 2 It is a structure schematic diagram of the explosion-proof monitoring unit of the utility model.

[0017] Figure 3 It is an internal structure schematic diagram of the industrial-grade anti-interference algorithm box of the utility model.

[0018] Figure 4 It is a structure schematic diagram of the on-site control terminal of the utility model.

[0019] Figure 5 It is a system network topology diagram of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0021] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0022] As shown in Figure 1 An anti-electromagnetic interference intelligent monitoring system suitable for a substation environment, comprising an explosion-proof monitoring unit 1, an industrial-grade anti-interference algorithm box 2 and a field control terminal 3. The explosion-proof monitoring unit 1 serves as a front-end data acquisition device, is connected with the industrial-grade anti-interference algorithm box 2 through an industrial-grade optical fiber ring network 4, and the industrial-grade anti-interference algorithm box 2 is connected with the field control terminal 3 through double network ports.

[0023] In the present embodiment, the specific structure of the explosion-proof monitoring unit 1 comprises: an explosion-proof shell 11 and a dual-spectrum imaging module 12, a lightning protection module 13, a fiber optic transceiver 14 and an explosion-proof wiring cavity 15 located in the explosion-proof shell 11. The explosion-proof shell 11 is made of 304 stainless steel with a wall thickness of 4mm, is subjected to corrosion treatment, has an IP67 protection level and an Ex d IIB T6 Gb explosion-proof level. The explosion-proof shell 11 adopts a split design, facilitating maintenance of the internal modules. All fasteners connected with the explosion-proof shell 11 adopt a locking structure to ensure the reliability of long-term use.

[0024] The dual-spectrum imaging module 12 integrates a 5 million pixel visible light sensor and a 384x288 resolution uncooled infrared detector, adopts an integrated design to realize accurate registration of visible light and infrared images. The module is equipped with an electric zoom lens, has an automatic defogging function, and is provided with a dust and rain wiper to ensure all-weather image acquisition quality. The image processing circuit adopts an independent shielding cavity design to improve the anti-interference ability.

[0025] The lightning protection module 13 adopts a three-level protection structure: the first level adopts a 20KA gas discharge tube for lightning surge protection; the second level adopts a 10KA voltage-sensitive resistor for further overvoltage attenuation; and the third level adopts a 400W TVS tube for accurate protection. The module has a self-diagnosis function, which can alarm in time when the protection device fails.

[0026] The optical fiber transceiver 14 is designed with an industrial-grade SFP optical module, supports 1310nm and 1550nm dual wavelengths, and the transmission distance can reach 20km. The optical fiber transceiver 14 is powered by an independent power supply and has an optical-electric isolation protection function, which can effectively prevent surge and common-mode interference. The interface adopts an LC / UPC connector, which is convenient for on-site installation and maintenance.

[0027] The explosion-proof wiring cavity 15 adopts an independent cavity design and is provided with an explosion-proof sealing structure between the main cavity. The wiring terminal adopts a waterproof terminal with a 4mm² specification and has an IP67 protection level. All cable entrances are provided with armored cable fixing devices and sealing elements to ensure connection reliability.

[0028] Referring to Figure 2 , the internal structure of the industrial anti-interference algorithm box 2 includes an electromagnetic shielding shell 21 and a heat dissipation system 22, an anti-interference power supply 23, a communication module 24 and an industrial Ethernet interface 25 located in the electromagnetic shielding shell 21. The electromagnetic shielding shell 21 is made of aluminum alloy, and the electromagnetic shielding shell 21 is lined with three layers of electromagnetic shielding nets. The outer layer is made of 0.5mm galvanized steel plate, which can provide 90dB attenuation; the middle layer is made of 0.3mm nickel mesh, which can provide 80dB attenuation; and the inner layer is made of 0.2mm copper mesh, which can provide 60dB attenuation. All seams of the shell are provided with conductive sealing strips to ensure the shielding effect.

[0029] The heat dissipation system 22 adopts a honeycomb-shaped heat dissipation channel design and is filled with heat-conducting liquid inside. The heat dissipation system has a heat dissipation capacity of ≥200W and is equipped with two sets of explosion-proof temperature control fans with adjustable speed of 0-3000rpm. When the internal temperature exceeds 45℃, the heat dissipation is automatically started. The system noise is controlled below 45dB, which is suitable for use in the field environment.

[0030] The anti-interference power supply 23 adopts an EMC filter design and meets the EN61000-4 standard. The input voltage range is AC 176-264V, and it has a surge protection function (6KV / 3KA). The power module efficiency is ≥92%, and the power factor is ≥0.95. All power lines use shielded cables and are provided with an independent grounding terminal.

[0031] The communication module 24 adopts an optoelectronic isolation design, with an isolation voltage of 2500Vrms and a response time of <100ns. The module has a common mode rejection ratio of 120dB@60Hz and a differential mode rejection ratio of 80dB@60Hz. It supports the IEEE 1588 PTP time synchronization protocol, ensuring clock synchronization of each part of the system.

[0032] The industrial Ethernet interface 25 adopts a gigabit SFP optical module, supporting hot plug function. The interface supports RSTP / ERPS redundancy protocol, and can complete switching within 20ms when any link fails. The system adopts a dual-network interface design, supporting ring network communication, improving system reliability.

[0033] Referring to Figure 3 , the structure of the field control terminal 3 includes an industrial control host 35 connected with an explosion-proof display unit 31, an uninterruptible power supply 32, a relay control module 33 and an audible and visual alarm device 34. The explosion-proof display unit 31 adopts a 10.4-inch industrial-grade TFT-LCD display screen with a resolution of 1024x768 and a brightness of 800cd / m², and a visual angle of 178°. The display screen adopts an explosion-proof tempered glass with a thickness of 3mm and an anti-glare coating. The touch screen adopts a 10-point capacitive design, supporting waterproof glove operation.

[0034] The uninterruptible power supply 32 adopts an online double-conversion structure, with a capacity of 1KVA / 0.8KW. The input voltage range is AC 176-264V, equipped with 4 pieces of 12V / 100AH valve-regulated lead-acid batteries, which can provide backup power for not less than 4 hours. The UPS has perfect battery management functions, including temperature compensation charging, periodic activation maintenance, etc. The system conversion efficiency is ≥95%, with the characteristics of zero switching time.

[0035] The relay control module 33 provides 8 independent strong current control outputs. Each relay contact capacity is AC 250V / 10A or DC 30V / 10A, with a mechanical life of not less than 100 million times. The module adopts an optoelectronic isolation design, with overcurrent protection and state indication functions. It supports remote control and local manual operation, and can realize various linkage control functions.

[0036] The audible and visual alarm device 34 adopts an explosion-proof design, with an explosion-proof grade of Ex db IIB T6 Gb. The sound pressure level is 110dB / 1m, using a 5W high-brightness LED light source, with multiple alarm modes to choose from. The device adopts a 304 stainless steel shell, with a protection grade of IP66, suitable for use in harsh environments.

[0037] The industrial control host 35 adopts a fanless embedded design, equipped with a quad-core 2.3GHz processor, 8GB DDR4 memory and 256GB industrial-grade SSD storage. The host has a watchdog circuit with power failure protection and automatic restart function. All interfaces use industrial-grade devices to ensure long-term stable operation.

[0038] The installation and deployment scheme of the system is as follows:

[0039] 1. The explosion-proof monitoring unit 1 adopts a vertical pole installation method, with a height adjustable bracket of 2000-2500mm. The installation bracket has a shock absorption structure and an angle locking mechanism, which can be flexibly adjusted according to the on-site requirements. The bracket is made of 304 stainless steel and the surface is treated with anti-corrosion.

[0040] 2. The industrial anti-interference algorithm box 2 is set in a separate equipment box. The equipment box adopts a floor-mounted installation method with a rainproof canopy and a heat dissipation louver. The box size is 600x400x200mm, and the weight is about 15kg. The box bottom is provided with a water accumulation drainage hole and is equipped with a temperature and humidity control device.

[0041] 3. The on-site control terminal 3 is installed in the explosion-proof operation room. The operation room adopts a positive pressure ventilation design to prevent dust from entering. The overall size of the terminal is 800x600x300mm, and the weight is about 25kg. All cable connections use waterproof connectors and are provided with cable fixing devices.

[0042] The network architecture of the system adopts a ring optical fiber network topology, and the specific connection method is as follows:

[0043] 1. The explosion-proof monitoring unit 1 is connected to the industrial optical fiber ring network 4 through the optical fiber transceiver 14. The optical fiber adopts a single-mode 9 / 125μm specification with a maximum attenuation of ≤0.4dB / km. Each monitoring unit is equipped with an independent lightning protector and grounding device.

[0044] 2. The industrial anti-interference algorithm box 2 realizes ring network redundancy through dual industrial Ethernet ports. The network uses RSTP protocol for self-healing, which can complete switching within 20ms when link failure occurs. The system supports IEEE 1588 PTP time synchronization.

[0045] 3. The on-site control terminal 3 adopts a dual-port design and supports master-slave switching. All devices are connected through equipotential bonding to ensure safe and reliable operation of the system.

[0046] The debugging and maintenance scheme of the system is as follows:

[0047] 1. System debugging

[0048] First, single machine debugging: light school qualified to the explosion-proof monitoring unit 1, adjust the image registration accuracy of the dual-spectrum imaging module 12. Check the grounding resistance of the lightning protection module 13, ensure less than 4 ohm. Test the optical power of the fiber transceiver 14, the attenuation should be within the preset range.

[0049] Second, network debugging: through the industrial fiber ring network 4, the ring network self-healing test, confirm that the system can complete the switching within 20ms when any link is disconnected. Detect the electromagnetic shielding effect of the industrial anti-interference algorithm box 2, measure the shell radiation under the rated working voltage, ensure that it meets the EMC standard requirements.

[0050] Finally, system debugging: test the uninterrupted power supply 32 switching time of the field control terminal 3, verify the power supply reliability. Test the linkage function of the relay control module 33, ensure that each contact action is normal. Test whether the sound pressure level and illuminance of the sound and light alarm device 34 meet the standard.

[0051] 2、Daily maintenance

[0052] Regular maintenance items include: check the sealing performance of the explosion-proof shell 11 every month, observe whether the sealing ring is aging. Clean the lens and dustproof glass of the dual-spectrum imaging module 12 every quarter. Detect the performance index of the lightning protection module 13 every half year, replace the failed devices.

[0053] For the industrial anti-interference algorithm box 2, the focus is to check the running state of the heat dissipation system 22, clean the dust in the heat dissipation channel, and ensure that the temperature control fan works normally. Test the output voltage fluctuation range of the anti-interference power supply 23 every month, verify the EMC filtering effect.

[0054] The maintenance of the field control terminal 3 mainly includes: activate the UPS battery every month, test the backup power time. Check the contact resistance of the relay contact every quarter, ensure reliable action. Calibrate the touch accuracy of the display unit every half year, ensure the operation accuracy.

[0055] 3、System application

[0056] This system is mainly applied to the following scenes: safety monitoring of substation construction site, quality supervision of equipment installation process, real-time monitoring of live work, etc. The system has the following characteristics:

[0057] Explosion-proof performance: through the special design of the explosion-proof shell 11, ensure safe work in flammable and explosive environment. The shell is made of 304 stainless steel material, with a wall thickness of 4mm, which has enough mechanical strength. Split structure is convenient for maintenance, while ensuring the explosion-proof performance.

[0058] Anti-interference ability: The industrial anti-interference algorithm box 2 adopts a three-layer shielding structure, effectively preventing electromagnetic interference generated by high-voltage equipment. The EMC design of the anti-interference power supply 23 further improves the anti-interference performance of the system.

[0059] Reliability guarantee: The ring-shaped optical fiber network architecture is adopted, with perfect redundancy protection mechanism. The uninterruptible power supply 32 provides reliable backup power supply, and the relay control module 33 realizes fast linkage control, ensuring the continuous and stable operation of the system.

[0060] The utility model has the following technical characteristics and advantages in practical application:

[0061] 1. All-weather monitoring capability

[0062] The dual-spectrum imaging module 12 adopts visible light and infrared image fusion technology, and can obtain clear images under different light and weather conditions. The visible light sensor provides 5 million pixel high-definition images during the day, and the infrared detector provides 384x288 resolution thermal imaging at night, realizing 24-hour uninterrupted monitoring.

[0063] The lens adopts electric zoom design, the focal length range is 6-12mm adjustable, and the field of view angle is 54°-27.5° variable. The automatic defogging function and the dustproof wiper ensure the image quality in rainy and foggy weather. The image processing circuit adopts independent shielding design, which can maintain image stability even in strong electromagnetic environment.

[0064] 2. Perfect protection measures

[0065] The lightning protection of the explosion-proof monitoring unit 1 adopts a three-level protection structure. The first stage 20KA gas discharge tube is used to defend against lightning surge, the second stage 10KA voltage-sensitive resistor is used for overvoltage attenuation, and the third stage 400W TVS tube is used to ensure accurate protection. The module has self-diagnosis function, which can alarm in time when the protection device fails, and is convenient for maintenance and replacement.

[0066] The heat dissipation system 22 of the industrial anti-interference algorithm box 2 adopts honeycomb heat dissipation channel, filled with heat-conducting liquid, and the heat dissipation capacity is ≥200W. The temperature control fan starts automatically when the internal temperature exceeds 45℃, and the speed is adjustable from 0-3000rpm. The system noise is controlled below 45dB, which does not affect the on-site working environment.

[0067] 3. Intelligent linkage function

[0068] The relay control module 33 of the on-site control terminal 3 provides 8 independent strong current control outputs, and the contact capacity is AC250V / 10A. The response time of the module is ≤10ms, which can realize fast linkage control. Each relay is equipped with overcurrent protection and state indication, and supports remote control and local manual operation.

[0069] The sound-light alarm device 34 provides 110 dB / 1m sound pressure level alarm and 5W LED light source warning. The device has multiple alarm modes to choose from, and can trigger corresponding alarm modes according to different levels of abnormal conditions. The device has a 304 stainless steel shell, IP66 protection level, and can work reliably in harsh environments.

[0070] 4、Maintenance convenience

[0071] The system adopts modular design, and each functional unit can be independently maintained and replaced. The split structure of the explosion-proof shell 11 facilitates internal maintenance, and all connections use quick connectors to reduce maintenance time. The electromagnetic shielding shell 21 design takes into account the need for heat dissipation and maintenance, and the maintenance opening can be quickly opened for maintenance.

[0072] The uninterruptible power supply 32 uses intelligent battery management technology, with temperature compensation charging, regular activation maintenance and other functions. The system has perfect self-diagnosis function, can find and report equipment abnormalities in time, and supports preventive maintenance. The display interface of the field control terminal 3 is intuitive and friendly, and is convenient for operators to perform daily maintenance operations.

[0073] 5、System expansion capability

[0074] The industrial-grade fiber ring network 4 uses standard communication protocols and reserves sufficient bandwidth for future system expansion. The device interface uses standard specifications, making it easy to connect new monitoring devices. The system software uses modular design, supports flexible expansion of functions, and can be customized and developed according to actual needs.

[0075] The above is only the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the overall concept of the present application, a number of changes and improvements can be made, which should be considered as the protection range of the present application.

Claims

1. A smart site anti-electromagnetic interference intelligent monitoring system suitable for a substation environment, characterized in that: It comprises an explosion-proof monitoring unit (1), an industrial anti-interference algorithm box (2) and a field control terminal (3), wherein the explosion-proof monitoring unit (1) is connected with the industrial anti-interference algorithm box (2) through an industrial optical fiber ring network (4) as a front-end data acquisition device, and the industrial anti-interference algorithm box (2) is connected with the field control terminal (3) through a double-network port; The explosion-proof monitoring unit (1) comprises an explosion-proof shell (11), a dual-spectrum imaging module (12), a lightning protection module (13), an optical fiber transceiver (14) and an explosion-proof wiring cavity (15) in the explosion-proof shell (11); The industrial anti-interference algorithm box (2) comprises an electromagnetic shielding shell (21), a heat dissipation system (22), an anti-interference power supply (23), a communication module (24) and an industrial Ethernet interface (25) in the electromagnetic shielding shell (21); The structure of the field control terminal (3) comprises an industrial control host (35), which is connected with an explosion-proof display unit (31), an uninterruptible power supply (32), a relay control module (33) and an audible and visual alarm device (34). 2.The smart construction anti-electromagnetic interference intelligent monitoring system suitable for a substation environment of claim 1, wherein: The lightning protection module (13) adopts a three-level protection structure: the first level adopts a 20KA gas discharge tube; the second level adopts a 10KA voltage-dependent resistor; and the third level adopts a 400W TVS tube. 3.The smart construction anti-electromagnetic interference intelligent monitoring system suitable for a substation environment of claim 1, wherein: The electromagnetic shielding shell (21) is made of aluminum alloy, and is lined with three layers of electromagnetic shielding nets: an outer layer of 0.5mm galvanized steel plate, a middle layer of 0.3mm nickel net and an inner layer of 0.2mm copper net. 4.The smart construction anti-electromagnetic interference intelligent monitoring system suitable for a substation environment of claim 1, wherein: The explosion-proof monitoring unit (1) is installed on a support with a height of 2000-2500mm, and a shock absorption structure and an angle locking mechanism are arranged on the support. 5.The smart construction anti-electromagnetic interference intelligent monitoring system suitable for a substation environment of claim 1, wherein: The explosion-proof monitoring unit (1) is connected with the industrial optical fiber ring network (4) through the optical fiber transceiver (14).

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