Intelligent pole-mounted transformer platform complete equipment and control method

Abstract

The application provides a kind of intelligent column transformer platform complete equipment and control method, the complete equipment includes transformer frame, which is fixedly installed with three-phase intelligent high-voltage disconnecting switch, three-phase intelligent drop-out fuse, intelligent transformer, three-phase intelligent low-voltage circuit breaker and intelligent controller from top to bottom; three-phase intelligent high-voltage disconnecting switch is provided with wind vane laterally, and the resistance body and wind vane rotating shaft brush constitute a voltage dividing circuit; the intelligent controller is connected with wind vane, three-phase intelligent high-voltage disconnecting switch, three-phase intelligent drop-out fuse, three-phase intelligent low-voltage circuit breaker and intelligent transformer oil temperature and oil pressure sensor.The control method includes: closing three-phase intelligent high-voltage disconnecting switch, three-phase intelligent drop-out fuse and three-phase intelligent low-voltage circuit breaker in wind direction sequence when power transmission; and opening in reverse sequence when power off.The application relates to the technical field of transformer.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to an intelligent pole-mounted transformer platform and its control method. Background Technology

[0002] Currently, most pole-mounted transformer sets adopt traditional mechanical structures, and their operation mainly relies on manual on-site execution. Especially in severe weather conditions (such as heavy rain and strong winds), operators need to climb the poles to perform switching operations, which poses a high risk of electric shock and falls. At the same time, the equipment lacks remote monitoring and online diagnostic functions, and its daily operation status depends on periodic manual inspections. This makes it difficult to detect hidden dangers such as overheating of equipment contacts and transformer overheating in a timely manner, which may lead to chain accidents such as fires or equipment damage. In addition, when a line fault occurs, traditional equipment cannot provide accurate location information, and repair personnel need to check the fault point section by section, which takes several hours on average, significantly prolonging the power outage time for users.

[0003] While some existing technologies attempt to incorporate electric operating mechanisms, they still suffer from three major drawbacks: First, the operating logic does not consider the impact of wind direction on the electric arc, making it prone to phase-to-phase short circuits due to arc drift during closing. Second, high-precision sensing units are not integrated, making it impossible to monitor key parameters (such as contact temperature and sudden current changes) in real time. Third, a fault response mechanism is lacking, resulting in significant delays from fault occurrence to location and repair. These deficiencies make it difficult for the equipment's safety, reliability, and operational efficiency to meet the demands of modern power distribution networks.

[0004] Therefore, the inventors urgently need an intelligent pole-mounted transformer platform and control method to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this invention provides an intelligent pole-mounted transformer platform and control method. It aims to solve the safety risks associated with manual operation, the delayed detection of potential hazards due to lack of real-time status monitoring, and the long power outage time caused by difficulties in fault location in existing pole-mounted transformer platform equipment. Simultaneously, it overcomes the deficiencies of existing technologies, such as the failure to consider the impact of wind direction on electric arcs leading to phase-to-phase short circuit risks, the lack of integrated high-precision sensing units resulting in missing key parameter monitoring, and insufficient fault response mechanisms leading to delayed emergency repairs.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an intelligent pole-mounted transformer platform complete set of equipment, including a transformer frame, on which a three-phase intelligent high-voltage disconnect switch, a three-phase intelligent drop-out fuse, an intelligent transformer, a three-phase intelligent low-voltage circuit breaker, and an intelligent controller are fixedly installed sequentially from top to bottom. A wind vane is provided on the side of the three-phase intelligent high-voltage disconnect switch. The wind vane includes a resistor and a wind vane shaft brush that rotates and contacts the resistor. The wind vane shaft brush slides and contacts the inner surface of the resistor to form a voltage divider circuit. The wind vane is connected to the intelligent controller via an angle-to-voltage signal conversion. The intelligent controller is connected to the oil temperature and oil pressure sensors inside the three-phase intelligent high-voltage disconnect switch, the three-phase intelligent drop-out fuse, the three-phase intelligent low-voltage circuit breaker, and the intelligent transformer.

[0007] Based on the above, an intelligent pole-mounted transformer platform complete set of equipment and control method solves the problems of safety risks caused by reliance on manual operation, delayed detection of hidden dangers due to lack of real-time status monitoring, and long power outage time caused by difficulty in fault location in the existing pole-mounted transformer platform complete set of equipment. It also overcomes the shortcomings of the existing technology, such as the risk of phase-to-phase short circuits caused by not considering the influence of wind direction on the electric arc, the lack of key parameter monitoring due to the absence of integrated high-precision sensing units, and the delay in emergency repairs due to insufficient fault response mechanisms. The main improvements are:

[0008] 1. This invention connects the drive signals and closing / opening signals of an intelligent controller, a three-phase intelligent high-voltage disconnector, a three-phase intelligent drop-out fuse, and a three-phase intelligent low-voltage circuit breaker. The intelligent controller can receive remote or local commands and control the closing drive motor of the three-phase intelligent high-voltage disconnector, the fuse opening and closing motor of the three-phase intelligent drop-out fuse, and the three-phase intelligent low-voltage circuit breaker to perform opening and closing operations through drive signals. It eliminates the need for manual operation by climbing poles, realizing remote and local electric control of the three-phase intelligent high-voltage disconnector, the three-phase intelligent drop-out fuse, and the three-phase intelligent low-voltage circuit breaker. This avoids high-risk manual opening and closing operations by operators in harsh environments such as night, heavy rain, and strong winds, significantly reducing the risk of electric shock and falls and ensuring personal safety.

[0009] 2. This invention utilizes electronic current and voltage sensors within the insulating support of an intelligent drop-out fuse, temperature sensing elements integrated within the fuse tube end cap, and oil temperature and pressure sensors within an intelligent transformer to collect real-time high-voltage circuit current, voltage, fuse contact point temperature, and transformer oil temperature and pressure signals. These signals are then transmitted to an intelligent controller, enabling real-time online monitoring of key equipment operating parameters. The intelligent controller can promptly analyze this data and issue early warnings or automatically execute protective actions when abnormalities such as contact overheating, transformer overheating, abnormal oil pressure, or overcurrent are detected. This allows potential hazards to be discovered and addressed early, preventing them from developing into serious accidents.

[0010] 3. This invention utilizes the GPS positioning module and 4G communication module integrated into the intelligent controller. When the intelligent controller triggers a tripping command due to protection actions such as overcurrent tripping or overtemperature tripping, or receives a fault signal, it immediately sends a fault alarm signal containing the GPS positioning information of the device to the backend master station via the 4G module. This achieves accurate and rapid location of the fault point, eliminating the need for repair personnel to conduct on-site segment-by-segment inspections. The backend master station can obtain the precise location information of the faulty device in the first instance, greatly shortening the fault finding time and saving time for quickly dispatching repair teams. This significantly reduces the power outage time for users and improves the reliability of power supply.

[0011] 4. This invention connects the wind vane to the intelligent controller via an angle-to-voltage signal conversion, and includes the intelligent controller's control logic for the opening and closing of three-phase intelligent high-voltage disconnect switches and three-phase intelligent drop-out fuses. Specifically, the wind vane detects the wind direction in real time and converts it into a voltage signal, which is then input to the intelligent controller. The intelligent controller then outputs the voltage (V...)... out The system determines the current wind direction range (0°<θ≤90°, 90°<θ≤180°, 180°<θ≤270°, 270°<θ≤360°) to identify the upwind, downwind, and intermediate phases as corresponding to phases A, B, and C, respectively. Following strict wind-direction-based closing and opening sequence requirements, it sends step-by-step drive signals to the three-phase intelligent high-voltage disconnect switches and three-phase intelligent drop-out fuses, achieving a one-click sequential control function based on real-time wind direction. During closing and opening operations, it automatically selects the optimal phase sequence, using wind direction to guide the operating arc away from energized or closed phases, effectively preventing phase-to-phase short-circuit accidents caused by arc drift and ensuring the safety of equipment and the power grid.

[0012] 5. This invention integrates an electronic current sensor with a low-power coil LPCT and an electronic voltage sensor using the capacitive voltage divider principle within the insulating support of an intelligent drop-out fuse; a temperature sensing element with a magnetically coupled RFID tag integrated within the fuse tube end cap; and an oil temperature and pressure sensor within an intelligent transformer. These are directly integrated into key components, utilizing specific principles to acquire high-precision, real-time core parameters such as high-voltage current, high-voltage voltage, fuse contact point temperature, and transformer oil temperature and pressure. This enables high-precision, real-time online monitoring of key operating parameters of the power distribution network, compensating for the deficiencies of traditional equipment in this regard and providing a reliable data foundation for equipment condition assessment, fault early warning, and automated protection.

[0013] 6. This invention utilizes a smart controller to monitor the signals from electronic current sensors, temperature sensing elements, and oil temperature and pressure sensors in real time. The integrated GPS positioning module and 4G communication module of the smart controller also feature an automatic triggering mechanism. The smart controller continuously analyzes sensor signals, and upon detecting preset fault conditions, such as an electronic current sensor detecting a current value exceeding 1.5 times the rated current for 1 second, an temperature sensing element exceeding its temperature limit, or abnormal oil temperature and pressure, it immediately and automatically outputs a trip command to the intelligent drop-out fuse to execute protection tripping. Simultaneously, it triggers a location information transmission process, actively pushing a fault alarm signal containing GPS location information to the backend main station via the 4G module. This achieves a response mechanism combining rapid automatic fault isolation with immediate proactive reporting of fault information. This mechanism activates instantly upon fault occurrence, eliminating the need for manual detection and reporting. It ensures that repair commands and location information are delivered to the backend immediately, significantly shortening the response time from fault occurrence to repair deployment and effectively solving the problem of repair delays caused by response delays.

[0014] Furthermore, the intelligent high-voltage disconnect switch includes a mounting bracket, a closing drive motor fixed above the mounting bracket, two supporting insulators symmetrically installed on both sides below the mounting bracket, an isolating switch erected between the two supporting insulators, and a first insulating rod connecting the output end of the closing drive motor to the isolating switch, wherein the axial movement direction of the first insulating rod is perpendicular to the closing plane of the isolating switch.

[0015] Based on the above, the beneficial effects of the mounting bracket are to install the closing drive motor and support the insulator; the beneficial effect of the closing drive motor is that by driving the first insulating pull rod to make linear motion, it realizes the replacement of manual operation and controls the opening and closing action of the isolating switch in an electric manner, meeting the requirements of remote control and one-button sequential control functions; the beneficial effect of the isolating switch is to realize the physical disconnection function of high voltage circuit conduction and isolation, and its opening and closing status is fed back to the intelligent controller through position signals, providing a status confirmation basis for the sequential control logic.

[0016] Furthermore, the intelligent drop-out fuse includes a fuse opening and closing motor, a vertically mounted insulating support, a fuse, an upper contact located at the upper end of the insulating support, a lower contact located at the lower end of the insulating support, a transmission mechanism with one end hinged to the outer end of the lower contact, and a second insulating pull rod located at the output end of the fuse opening and closing motor. The other end of the second insulating pull rod is hinged to the middle of the transmission mechanism. The lower end of the fuse is snapped onto the transmission mechanism, and the upper end of the fuse is hooked to the extension rod of the transmission mechanism via a ring-shaped hook. The upper end of the fuse is slidably engaged within the upper contact.

[0017] Based on the above, the beneficial effects of the fuse opening and closing motor are as follows: by driving the second insulating pull rod to make linear motion through the output end, it realizes the replacement of manual operation and controls the separation or closure of the fuse and the upper contact electrically, meeting the requirements of remote control and wind direction adaptive opening and closing; the beneficial effects of the insulating support are that it realizes the real-time monitoring of electrical parameters on the high-voltage side while supporting the conductive part of the fuse, and provides insulation protection for the sensor; the beneficial effects of the fuse are that it realizes the overcurrent protection function through the fuse wire, and its upper end is connected to the transmission mechanism through the ring hook, and its lower end is snapped into the transmission mechanism, realizing that it can automatically complete the separation or closure of the upper contact under the drive of the motor, and can be easily replaced after melting; the beneficial effects of the upper contact are that it realizes the reliable electrical connection of the upper end of the fuse; the beneficial effects of the lower contact are that it realizes the fixed electrical connection of the lower end of the fuse; the beneficial effects of the transmission mechanism are that it realizes the conversion of the linear motion of the fuse opening and closing motor into the swinging motion of the fuse, completing the automatic opening and closing of the fuse.

[0018] Furthermore, the insulating support includes two coaxially arranged electronic voltage sensors, a conversion module connected between the two electronic voltage sensors, an electronic current sensor disposed on the top of the upper electronic voltage sensor, and a conductive insert disposed on the side of the electronic current sensor. The other end of the conductive insert is embedded in the upper contact. The two electronic voltage sensors, the conversion module, the electronic current sensor, and the conductive insert are integrally cast with epoxy resin and externally covered with a weather-resistant silicone rubber layer.

[0019] Based on the above, the beneficial effects of the electronic voltage sensor are: it uses the capacitive voltage division principle to acquire voltage signals; two coaxially arranged electronic voltage sensors are connected through a conversion module to achieve accurate measurement of the high-voltage side voltage, providing real-time voltage data for the intelligent controller; the beneficial effects of the electronic current sensor are: it enables real-time monitoring of the high-voltage side current, triggering protection actions when the detected current exceeds the set value; the beneficial effects of the conductive insert are: it ensures a reliable electrical connection between the electronic current sensor and the upper contact, while also guaranteeing mechanical strength; the beneficial effects of the epoxy resin integrated casting molding are: it achieves high-strength fixation of internal components and overall insulation protection; and the beneficial effects of the weather-resistant silicone rubber layer are: it provides moisture-proof, dirt-proof, and UV-resistant protection for internal electronic components, ensuring long-term stable operation of the equipment in harsh outdoor environments.

[0020] Furthermore, the fuse includes a fuse tube, a fuse tube end cap fixed to the upper end of the fuse tube, a fuse wire disposed inside the fuse tube, and a fuse tube lower fixing member disposed at the lower end of the fuse tube. The fuse tube end cap is embedded with a temperature measuring element, and the outer surface of the fuse tube end cap is slidably fastened to the inner wall of the upper contact.

[0021] Based on the above, the beneficial effects of the fuse tube are that it accommodates the fuse wire and connects the fuse tube end cap and the lower fixing component, thus realizing the mechanical support and arc isolation functions of the fuse; the beneficial effects of the fuse tube end cap are that it enables real-time monitoring of the contact point temperature and reliable electrical connection between the fuse and the upper contact; the beneficial effects of the fuse wire are that it enables the circuit to be cut off under overcurrent conditions, providing basic overcurrent protection; the beneficial effects of the lower fixing component are that it provides fixed support for the lower end of the fuse and electrical connection with the lower contact; the beneficial effects of the temperature sensing element are that it adopts a magnetically coupled RFID tag structure, which enables the measurement of the contact point temperature of the upper contact and transmits the temperature signal to the intelligent controller.

[0022] Furthermore, when the electronic current sensor detects that the current value exceeds 1.5 times the rated current for 1 second, the intelligent controller outputs a trip command to the intelligent drop-out fuse.

[0023] Furthermore, the three-phase intelligent high-voltage disconnect switch, the three-phase intelligent drop-out fuse, and the three-phase intelligent low-voltage circuit breaker all transmit closing and opening signals to the intelligent controller, and the intelligent controller transmits drive signals to the three-phase intelligent high-voltage disconnect switch, the three-phase intelligent drop-out fuse, and the three-phase intelligent low-voltage circuit breaker, respectively.

[0024] Furthermore, the present invention also provides a control method for an intelligent pole-mounted transformer assembly, comprising the following steps:

[0025] S1. Power supply control: After receiving the closing command, the intelligent controller determines the closing sequence according to the angle-to-voltage signal of the wind vane, drives the three-phase intelligent high-voltage disconnect switches to close sequentially in the order of upwind phase, downwind phase and middle phase, and after confirming that the three-phase intelligent high-voltage disconnect switches are closed, drives the three-phase intelligent drop-out fuses to close sequentially in the same wind phase order, and after confirming that the three-phase intelligent drop-out fuses are closed, drives the three-phase intelligent low-voltage circuit breaker to close.

[0026] S2. Power-off control: After receiving the tripping command, the intelligent controller drives the three-phase intelligent low-voltage circuit breaker to trip. After confirming that the three-phase intelligent low-voltage circuit breaker is in the tripped position, the tripping sequence is determined according to the angle-to-voltage signal of the wind vane. The controller drives the three-phase intelligent drop-out fuse to trip in the order of middle phase, downwind phase and upwind phase. After confirming that the three-phase intelligent drop-out fuse is in the tripped position, the controller drives the three-phase intelligent high-voltage disconnector to trip.

[0027] S3. Protection and control: The intelligent controller monitors the overcurrent signal of the electronic current sensor, the temperature signal of the temperature sensing element, and the oil temperature and oil pressure signal of the oil temperature and oil pressure sensor in real time. When any signal exceeds the threshold, the intelligent controller outputs a trip command to the intelligent drop-out fuse.

[0028] S4. Fault location: After the trip command is triggered, the intelligent controller sends the GPS location information to the main station through the 4G module.

[0029] Furthermore, define V in V is the input voltage. out Let V be the output voltage, θ be the wind vane rotation angle, and the voltage division value of the wind vane satisfies the relationship V out =V in ×θ / 360°.

[0030] Furthermore, in steps S1 to S2, the phase located on the west side is defined as phase A, the phase located in the middle is defined as phase B, and the phase located on the east side is defined as phase C. The upwind phase is the phase line upstream of the current wind direction, the downwind phase is the phase line downstream of the current wind direction, and the middle phase is phase B located between phase A and phase C.

[0031] When the wind direction angle θ satisfies 0° < θ ≤ 90°, V out ≤1 / 4V in At this time, the upwind phase is phase C, the downwind phase is phase A, the middle phase is phase B, the closing sequence is phase C, phase A, phase B, and the opening sequence is phase B, phase A, phase C.

[0032] When the wind direction angle θ satisfies 90° < θ ≤ 180°, 1 / 4V in <Vout ≤1 / 2V in At this time, the upwind phase is phase A, the downwind phase is phase C, the middle phase is phase B, the closing sequence is phase A, phase C, phase B, and the opening sequence is phase B, phase C, phase A.

[0033] When the wind direction angle θ satisfies 180° < θ ≤ 270°, 1 / 2V in <V out ≤3 / 4V in At this time, the upwind phase is phase A, the downwind phase is phase C, the middle phase is phase B, the closing sequence is phase A, phase C, phase B, and the opening sequence is phase B, phase C, phase A.

[0034] When the wind direction angle θ satisfies 270° < θ ≤ 360°, 3 / 4V in <V out ≤V in At this time, the upwind phase is phase C, the downwind phase is phase A, and the middle phase is phase B. The closing sequence is phase C, phase A, and phase B, and the opening sequence is phase B, phase A, and phase C.

[0035] To make the above features of the present invention and the objectives to be achieved clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0036] Figure 1 This is a front view of the transformer frame of the present invention;

[0037] Figure 2 This is a side view of the present invention;

[0038] Figure 3 This is a schematic diagram of the wind vane of the present invention;

[0039] Figure 4 This is a schematic diagram of the intelligent high-voltage disconnect switch of the present invention;

[0040] Figure 5 This is a schematic diagram of the intelligent drop-out fuse of the present invention;

[0041] Figure 6 This is a schematic diagram of the insulating support of the present invention;

[0042] Figure 7 This is a schematic diagram of the fuse element of the present invention;

[0043] Figure 8 This is a cross-sectional schematic diagram of the fusion tube end cap of the present invention;

[0044] Figure 9 This is a phase diagram of the intelligent drop-out fuse of the present invention;

[0045] Figure 10This is a signal connection diagram for the present invention;

[0046] Figure 11 This is a flowchart of the control method of the present invention.

[0047] Reference numerals: 1-Intelligent high-voltage disconnect switch; 11-Mounting bracket; 12-Closing drive motor; 13-Support insulator; 14-Isolating switch; 15-First insulating rod; 2-Intelligent drop-out fuse; 21-Fuse opening / closing motor; 22-Insulating support post; 221-Electronic voltage sensor; 222-Conversion module; 223-Electronic current sensor; 224-Conductive insert; 23-Fuse. 231-Fuse tube, 232-Fuse tube end cap, 2321-Temperature sensing element, 2322-Ring hook, 233-Fuse wire, 234-Fuse tube lower fixing part, 24-Upper contact, 25-Lower contact, 26-Transmission mechanism, 27-Second insulating pull rod, 3-Weather vane, 31-Resistor, 32-Weather vane shaft brush, 4-Intelligent transformer, 5-Intelligent low-voltage circuit breaker, 6-Intelligent controller, 100-Transformer frame. Detailed Implementation

[0048] See Figures 1-11 As shown,

[0049] This invention provides an intelligent pole-mounted transformer assembly, including a transformer frame 100. From top to bottom, the transformer frame 100 is sequentially and fixedly equipped with a three-phase intelligent high-voltage disconnect switch 1, a three-phase intelligent drop-out fuse 2, an intelligent transformer 4, a three-phase intelligent low-voltage circuit breaker 5, and an intelligent controller 6. A wind vane 3 is provided on the side of the three-phase intelligent high-voltage disconnect switch 1. The wind vane 3 includes a resistor 31 and a wind vane shaft brush 32 that rotatably contacts the resistor 31. The wind vane shaft brush 32 slides and contacts the inner surface of the resistor 31 to form a voltage divider circuit. The wind vane 3 is connected to the intelligent controller 6 via an angle-to-voltage signal conversion. The intelligent controller 6 is connected to oil temperature and oil pressure sensors in the three-phase intelligent high-voltage disconnect switch 1, the three-phase intelligent drop-out fuse 2, the three-phase intelligent low-voltage circuit breaker 5, and the intelligent transformer 4.

[0050] In this embodiment, the intelligent high-voltage disconnect switch 1 includes a mounting bracket 11, a closing drive motor 12 fixed above the mounting bracket 11, two supporting insulators 13 symmetrically installed on both sides below the mounting bracket 11, an isolating switch 14 erected between the two supporting insulators 13, and a first insulating rod 15 connecting the output end of the closing drive motor 12 and the isolating switch 14. The axial movement direction of the first insulating rod 15 is perpendicular to the closing plane of the isolating switch 14.

[0051] In this embodiment, the intelligent drop-out fuse 2 includes a fuse opening and closing motor 21, a vertically installed insulating support 22, a fuse 23, an upper contact 24 located at the upper end of the insulating support 22, a lower contact 25 located at the lower end of the insulating support 22, a transmission mechanism 26 with one end hinged to the outer end of the lower contact 25, and a second insulating pull rod 27 located at the output end of the fuse opening and closing motor 21. The other end of the second insulating pull rod 27 is hinged to the middle of the transmission mechanism 26. The lower end of the fuse 23 is snapped onto the transmission mechanism 26, and the upper end of the fuse 23 is hooked to the extension rod of the transmission mechanism 26 via a ring hook 2322. The upper end of the fuse 23 is slidably engaged within the upper contact 24.

[0052] In this embodiment, the insulating support 22 includes two coaxially arranged electronic voltage sensors 221, a conversion module 222 connected between the two electronic voltage sensors 221, an electronic current sensor 223 disposed on the top of the upper electronic voltage sensor 221, and a conductive insert 224 disposed on the side of the electronic current sensor 223. The electronic voltage sensor 221 adopts the principle of capacitive voltage division, wherein its internal capacitor is a thin film capacitor. The electronic current sensor 223 adopts a low power coil LPCT. The other end of the conductive insert 224 is embedded in the upper contact 24. The two electronic voltage sensors 221, the conversion module 222, the electronic current sensor 223 and the conductive insert 224 are integrally cast with epoxy resin and externally covered with a weather-resistant silicone rubber layer.

[0053] In this embodiment, the fuse element 23 includes a fuse tube 231, a fuse tube end cap 232 fixed to the upper end of the fuse tube 231, a fuse wire 233 disposed in the fuse tube 231, and a fuse tube lower fixing member 234 disposed at the lower end of the fuse tube 231. The fuse tube end cap 232 is embedded with a temperature measuring element 2321, which is a magnetically coupled RFID tag. The magnetically coupled RFID tag is composed of an ultra-low power temperature sensor chip and a tag antenna coil. The tag antenna coil adopts an anti-metal structure, and the surface of the tag antenna coil is provided with ferrite material, which reduces the short-circuit effect of the electromagnetic field by more than 80%. The outer surface of the fuse tube end cap 232 is slidably fastened to the inner wall of the upper contact 24.

[0054] In this embodiment, when the electronic current sensor 223 detects that the current value exceeds 1.5 times the rated current for 1 second, the intelligent controller 6 outputs a trip command to the intelligent drop-out fuse 2.

[0055] In this embodiment, the three-phase intelligent high-voltage disconnect switch 1, the three-phase intelligent drop-out fuse 2, and the three-phase intelligent low-voltage circuit breaker 5 all transmit closing and opening signals to the intelligent controller 6, and the intelligent controller 6 transmits drive signals to the three-phase intelligent high-voltage disconnect switch 1, the three-phase intelligent drop-out fuse 2, and the three-phase intelligent low-voltage circuit breaker 5, respectively.

[0056] This invention also discloses a control method for an intelligent pole-mounted transformer assembly, comprising the following steps:

[0057] S1. Power supply control: After receiving the closing command, the intelligent controller 6 determines the closing sequence according to the angle-to-voltage signal of the wind vane 3, drives the three-phase intelligent high-voltage disconnect switch 1 to close sequentially in the order of upwind phase, downwind phase and middle phase, and after confirming that the three-phase intelligent high-voltage disconnect switch 1 is closed, drives the three-phase intelligent drop-out fuse 2 to close sequentially in the same wind phase order, and after confirming that the three-phase intelligent drop-out fuse 2 is closed, drives the three-phase intelligent low-voltage circuit breaker 5 to close.

[0058] S2. Power-off control: After receiving the tripping command, the intelligent controller 6 drives the three-phase intelligent low-voltage circuit breaker 5 to trip. After confirming that the three-phase intelligent low-voltage circuit breaker 5 is in the tripping position, the tripping sequence is determined according to the angle-to-voltage signal of the wind vane 3. The three-phase intelligent drop-out fuse 2 is driven to trip in the order of middle phase, downwind phase and upwind phase. After confirming that the three-phase intelligent drop-out fuse 2 is in the tripping position, the three-phase intelligent high-voltage disconnector 1 is driven to trip.

[0059] S3. Protection and control: The intelligent controller 6 monitors the overcurrent signal of the electronic current sensor 223, the temperature signal of the temperature measuring element 2321, and the oil temperature and oil pressure signal of the oil temperature and oil pressure sensor in real time. When any signal exceeds the threshold, the intelligent controller 6 outputs a trip command to the intelligent drop-out fuse 2.

[0060] S4. Fault location: After the trip command is triggered, the intelligent controller 6 sends the GPS positioning information to the main station through the 4G module.

[0061] In this embodiment, V is defined. in V is the input voltage. out The output voltage is given by θ, where θ is the rotation angle of the wind vane. The voltage division value of the wind vane 3 satisfies the relationship V. out =V in ×θ / 360°.

[0062] In steps S1 to S2 of this embodiment, the phase located on the west side is defined as phase A, the phase located in the middle is defined as phase B, and the phase located on the east side is defined as phase C. The upwind phase is the phase line on the upstream side of the current wind direction, the downwind phase is the phase line on the downstream side of the current wind direction, and the middle phase is phase B located between phase A and phase C.

[0063] When the wind direction angle θ satisfies 0° < θ ≤ 90°, V out ≤1 / 4V in At this time, the upwind phase is phase C, the downwind phase is phase A, the middle phase is phase B, the closing sequence is phase C, phase A, phase B, and the opening sequence is phase B, phase A, phase C.

[0064] When the wind direction angle θ satisfies 90° < θ ≤ 180°, 1 / 4V in <V out ≤1 / 2V in At this time, the upwind phase is phase A, the downwind phase is phase C, the middle phase is phase B, the closing sequence is phase A, phase C, phase B, and the opening sequence is phase B, phase C, phase A.

[0065] When the wind direction angle θ satisfies 180° < θ ≤ 270°, 1 / 2V in <V out ≤3 / 4V in At this time, the upwind phase is phase A, the downwind phase is phase C, the middle phase is phase B, the closing sequence is phase A, phase C, phase B, and the opening sequence is phase B, phase C, phase A.

[0066] When the wind direction angle θ satisfies 270° < θ ≤ 360°, 3 / 4V in <V out ≤V in At this time, the upwind phase is phase C, the downwind phase is phase A, and the middle phase is phase B. The closing sequence is phase C, phase A, and phase B, and the opening sequence is phase B, phase A, and phase C.

[0067] In summary, the specific embodiments of the present invention are as follows:

[0068] During power transmission, after receiving the closing command, the intelligent controller 6 obtains the angle voltage signal through the voltage divider circuit formed by the rotation of the wind vane shaft brush 32 of the wind vane 3 and the resistor 31, and outputs the voltage V. out With input voltage V inThe ratio relationship is used to determine the wind direction range, and the three-phase closing sequence is determined as: upwind phase, downwind phase, and middle phase. The intelligent controller 6 sends a drive signal to the closing drive motor 12 of the three-phase intelligent high-voltage disconnect switch 1. The closing drive motor 12 pushes the isolating knife switch 14 through the first insulating pull rod 15 to complete the closing operation. After the isolating knife switch 14 of each phase is closed, the closing drive motor 12 feeds back the closing position signal to the intelligent controller 6. When the closing position signals of the three-phase intelligent high-voltage disconnect switch 1 are all confirmed, the intelligent controller 6 follows the same wind direction sequence. The three-phase intelligent drop-out fuse 2 sends a drive signal to the fuse opening and closing motor 21. The fuse opening and closing motor 21 drives the transmission mechanism 26 through the second insulating pull rod 27, so that the upper end of the fuse 23 slides into the upper contact 24 and completes the closing in sequence according to the three-phase sequence. After each phase fuse opening and closing motor 21 closes, it feeds back the closing position signal to the intelligent controller 6. When all the closing position signals of the three-phase intelligent drop-out fuse 2 are confirmed, the intelligent controller 6 drives the three-phase intelligent low-voltage circuit breaker 5 to close in sequence.

[0069] During the power outage, after receiving the tripping command, the intelligent controller 6 first sends tripping signals to each of the three-phase intelligent low-voltage circuit breakers 5. After the three-phase intelligent low-voltage circuit breakers 5 have completed tripping, they send a tripping signal back to the intelligent controller 6. The intelligent controller 6 then adjusts the tripping signal according to the V value of the wind vane 3. out The signal determines the wind direction range and determines the three-phase tripping sequence as: middle phase, downwind phase, upwind phase. The intelligent controller 6 sends a step-by-step drive signal to the fuse opening and closing motor 21. The three-phase fuse opening and closing motor 21 pulls the transmission mechanism 26 through the second insulating pull rod 27, so that the upper end of the three-phase fuse 23 slides away from the upper contact 24 and completes the tripping in sequence. After each phase trips, the fuse opening and closing motor 21 feeds back the tripping signal to the intelligent controller 6. When all the tripping signals of the three-phase intelligent drop-out fuse 2 are confirmed, the intelligent controller 6 drives the three-phase closing drive motor 12 to open the isolating knife switch 14 through the first insulating pull rod 15 and completes the tripping in sequence.

[0070] During operation monitoring, the electronic current sensor 223 inside the insulating support 22 collects the current signal in real time. When the current exceeds 1.5 times the rated current for 1 second, it immediately sends an overcurrent signal to the intelligent controller 6. At the same time, the temperature sensing element 2321 inside the fuse end cap 232 senses the temperature change through the LC resonant circuit formed by the tag antenna coil and the on-chip capacitor, and transmits the contact temperature signal to the intelligent controller 6 through the reader antenna installed on the intelligent controller 6. The oil temperature and oil pressure sensor inside the intelligent transformer 4 transmits oil temperature and oil pressure data to the intelligent controller 6 in real time.

[0071] During the protection and control process, the intelligent controller 6 continuously analyzes the overcurrent signal of the electronic current sensor 223, the temperature signal of the temperature measuring element 2321, and the oil temperature and oil pressure sensor signal. When any parameter exceeds the set threshold, the intelligent controller 6 immediately outputs a trip command to the fuse opening and closing motor 21 to execute the protection trip.

[0072] During fault location, simultaneously with the trip command, the intelligent controller 6 automatically sends GPS location information to the master station via the 4G module. When the fuse 23 falls due to overcurrent, the intelligent controller 6 simultaneously uploads the fault location information to the master station.

[0073] The above description is merely the optimal embodiment of the present invention and is not intended to limit the present invention. Any modifications or substitutions made by those skilled in the art without departing from the essence and scope of protection of the present invention should also be within the scope of protection of the present invention.

Claims

1. An intelligent pole transformer platform complete equipment, comprising a transformer stand (100), characterized in that: The transformer frame (100) is sequentially fixed and installed from top to bottom with three-phase intelligent high-voltage disconnecting switch (1), three-phase intelligent drop-out fuse (2), intelligent transformer (4), three-phase intelligent low-voltage circuit breaker (5) and intelligent controller (6), the side of the three-phase intelligent high-voltage disconnecting switch (1) is provided with a wind vane (3), the wind vane (3) comprises a resistor body (31) and a wind vane rotating shaft brush (32) rotatingly contacted in the resistor body (31), the wind vane rotating shaft brush (32) is in surface contact and sliding in the resistor body (31) to form a voltage dividing circuit, the wind vane (3) is connected with the intelligent controller (6) through an angle-to-voltage signal, the intelligent controller (6) is respectively connected with the three-phase intelligent high-voltage disconnecting switch (1), the three-phase intelligent drop-out fuse (2), the three-phase intelligent low-voltage circuit breaker (5), the oil temperature and oil pressure sensor in the intelligent transformer (4); The intelligent high-voltage disconnecting switch (1) comprises a mounting bracket (11), a closing drive motor (12) fixed above the mounting bracket (11), two support insulators (13) symmetrically mounted below the two sides of the mounting bracket (11), an isolation knife switch (14) erected between the two support insulators (13), and a first insulating pull rod (15) connecting the output end of the closing drive motor (12) and the isolation knife switch (14), the axial movement direction of the first insulating pull rod (15) is perpendicular to the closing plane of the isolation knife switch (14); The intelligent drop-out fuse (2) comprises a fuse opening and closing motor (21), a vertically mounted insulating support column (22), a fuse (23), an upper contact (24) provided on the upper end of the insulating support column (22), a lower contact (25) provided on the lower end of the insulating support column (22), a transmission mechanism (26) hingedly connected to the outer end of the lower contact (25), and a second insulating pull rod (27) provided on the output end of the fuse opening and closing motor (21), the other end of the second insulating pull rod (27) is hingedly connected to the middle part of the transmission mechanism (26), the lower end of the fuse (23) is buckle-mounted on the transmission mechanism (26), the upper end of the fuse (23) is connected with the extension rod of the transmission mechanism (26) through a ring-shaped hook member (2322), and the upper end of the fuse (23) is slidingly fitted in the upper contact (24).

2. The intelligent pole transformer platform complete equipment according to claim 1, characterized in that: The insulating pillar (22) comprises two coaxially arranged electronic voltage sensors (221), a conversion module (222) connected between the two electronic voltage sensors (221), an electronic current sensor (223) arranged on the top of the electronic voltage sensor (221) at the upper end, and a conductive insert (224) arranged on the side of the electronic current sensor (223), the other end of the conductive insert (224) being embedded in the upper contact (24), and the two electronic voltage sensors (221), the conversion module (222), the electronic current sensor (223) and the conductive insert (224) are integrally formed by epoxy resin pouring, and are externally coated with a weather-resistant silicone rubber layer.

3. The intelligent pole transformer platform complete equipment according to claim 2, characterized in that: The fuse element (23) comprises a fuse tube (231), a fuse tube end cover (232) fixed to the upper end of the fuse tube (231), a fuse (233) arranged in the fuse tube (231), and a fuse tube lower fixing element (234) arranged at the lower end of the fuse tube (231), the fuse tube end cover (232) is embedded with a temperature measuring element (2321), and the outer surface of the fuse tube end cover (232) is slidingly buckled on the inner wall of the upper contact (24).

4. The intelligent pole transformer platform complete equipment according to claim 2, characterized in that: When the electronic current sensor (223) detects that the current value exceeds 1.5 times the rated current for 1s, the intelligent controller (6) outputs a tripping command to the intelligent drop-out fuse (2).

5. The intelligent pole transformer platform complete equipment according to claim 1, characterized in that: The three-phase intelligent high-voltage disconnector (1), the three-phase intelligent drop-out fuse (2) and the three-phase intelligent low-voltage circuit breaker (5) all transmit on-off signals to the intelligent controller (6), and the intelligent controller (6) transmits driving signals to the three-phase intelligent high-voltage disconnector (1), the three-phase intelligent drop-out fuse (2) and the three-phase intelligent low-voltage circuit breaker (5) respectively.

6. The control method of the intelligent transformer substation equipment according to claim 3, characterized in that, The method comprises the following steps: S1. Power transmission control: after receiving the closing command, the intelligent controller (6) determines the closing sequence according to the angle-to-voltage signal of the wind vane (3), drives the three-phase intelligent high-voltage disconnector (1) to close in the order of the upper wind phase, the lower wind phase and the middle phase, confirms the closing of the three-phase intelligent high-voltage disconnector (1), drives the three-phase intelligent drop-out fuse (2) to close in the same wind phase order, confirms the closing of the three-phase intelligent drop-out fuse (2), and drives the three-phase intelligent low-voltage circuit breaker (5) to close; S2. Power cut-off control: after receiving the tripping command, the intelligent controller (6) drives the three-phase intelligent low-voltage circuit breaker (5) to trip, confirms the tripping of the three-phase intelligent low-voltage circuit breaker (5), determines the tripping sequence according to the angle-to-voltage signal of the wind vane (3), drives the three-phase intelligent drop-out fuse (2) to trip in the order of the middle phase, the lower wind phase and the upper wind phase, confirms the tripping of the three-phase intelligent drop-out fuse (2), and drives the three-phase intelligent high-voltage disconnector (1) to trip. S3. Protection control: the intelligent controller (6) monitors the overcurrent signal of the electronic current sensor (223), the temperature signal of the temperature measuring element (2321) and the oil temperature and pressure signal of the oil temperature and pressure sensor in real time. When any signal exceeds the threshold, the intelligent controller (6) outputs a tripping command to the intelligent drop-out fuse (2); S4. Fault location: after the tripping command is triggered, the intelligent controller (6) sends the GPS positioning information to the master station through the 4G module.

7. The control method of the intelligent transformer substation equipment according to claim 6, characterized in that: Define Vin as the input voltage, Vout as the output voltage, and θ as the wind vane rotation angle. The voltage division value of the wind vane (3) satisfies the relationship Vout=Vin×θ / 360°.

8. The control method of the intelligent transformer substation equipment according to claim 6, characterized in that: In steps S1-S2, the phase on the west side is defined as phase A, the phase in the middle is defined as phase B, and the phase on the east side is defined as phase C. Among them, the upper wind phase is the phase line on the upstream side of the current wind direction, the lower wind phase is the phase line on the downstream side of the current wind direction, and the middle phase is the B phase between the A phase and the C phase. When the wind direction angle θ satisfies 0°<θ≤90°, Vout≤1 / 4Vin, at this time the upper wind phase is C phase, the lower wind phase is A phase, and the middle phase is B phase, the closing sequence is C phase, A phase, B phase, and the opening sequence is B phase, A phase, C phase. When the wind direction angle θ satisfies 90°<θ≤180°, 1 / 4Vin<Vout≤1 / 2Vin, at this time the upper wind phase is A phase, the lower wind phase is C phase, and the middle phase is B phase, the closing sequence is A phase, C phase, B phase, and the opening sequence is B phase, C phase, A phase. When the wind direction angle θ satisfies 180°<θ≤270°, 1 / 2Vin<Vout≤3 / 4Vin, at this time the upper wind phase is A phase, the lower wind phase is C phase, and the middle phase is B phase, the closing sequence is A phase, C phase, B phase, and the opening sequence is B phase, C phase, A phase. When the wind direction angle θ satisfies 270°<θ≤360°, 3 / 4Vin<Vout≤Vin, at this time the upper wind phase is C phase, the lower wind phase is A phase, and the middle phase is B phase, the closing sequence is C phase, A phase, B phase, and the opening sequence is B phase, A phase, C phase.

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