Intelligent pole-mounted transformer platform complete equipment and control method

Abstract

The invention provides intelligent pole-mounted transformer platform complete equipment and a control method. The complete equipment comprises a transformer frame, wherein a three-phase intelligent high-voltage isolating 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 mounted on the transformer frame from top to bottom; a wind indicator is arranged on the side of the three-phase intelligent high-voltage isolation switch, and a resistor body and a wind indicator rotating shaft electric brush form a voltage division circuit; and the intelligent controller is connected with a wind indicator, a three-phase intelligent high-voltage isolating switch, a three-phase intelligent drop-out fuse, a three-phase intelligent low-voltage circuit breaker and an intelligent transformer oil temperature and oil pressure sensor. The control method comprises the following steps of: switching on the three-phase intelligent high-voltage isolating switch, the three-phase intelligent drop-out fuse and the three-phase intelligent low-voltage circuit breaker according to a wind direction sequence during power transmission; and reverse-sequence opening is carried out during power failure. The invention relates to the technical field of transformers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, and particularly relates to an intelligent pole-mounted transformer substation and a control method. BACKGROUND

[0002] Current pole-mounted transformer substations generally adopt traditional mechanical structures, and their operation mainly relies on manual on-site execution. In particular, under adverse weather conditions (such as heavy rain and strong wind), the operator needs to climb the pole to perform switching operation, which has a high risk of electric shock and falling. At the same time, the device lacks remote monitoring and online diagnosis functions, and the daily operation state relies on regular manual inspection, which makes it difficult to discover hidden dangers such as device contact heating and transformer over-temperature in a timely manner, and may cause fire or device damage and other chain accidents. In addition, when a line fault occurs, the traditional device cannot provide accurate positioning information, and the repair personnel need to check the fault point section by section, which takes more than an hour on average, significantly prolonging the user outage time.

[0003] In the prior art, although some devices attempt to introduce electric operation mechanisms, there are still three major defects: first, the operation logic does not consider the influence of wind direction on electric arc, which may cause inter-phase short circuit due to electric arc drift when closing; second, high-precision sensing units are not integrated, which cannot monitor key parameters (such as contact temperature and current mutation) in real time; third, the fault response mechanism is missing, and there is a serious delay from fault occurrence to positioning and repair. These defects make it difficult for the device to meet the safety, reliability and operation efficiency requirements of modern distribution networks.

[0004] Therefore, the present application needs an intelligent pole-mounted transformer substation and a control method to solve the above problems. SUMMARY

[0005] In view of the defects of the prior art, the present application provides an intelligent pole-mounted transformer substation and a control method, which aims to solve the safety risks caused by relying on manual operation, the hidden danger discovery lag caused by the lack of real-time state monitoring, and the long outage time caused by difficult fault positioning in the prior art, and to overcome the inter-phase short circuit risk caused by not considering the influence of wind direction on electric arc, the lack of key parameter monitoring caused by not integrating high-precision sensing units, and the repair delay caused by the lack of fault response mechanism in the prior art.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is: an intelligent pole-mounted transformer platform complete equipment, comprising a transformer stand, wherein the transformer stand is sequentially fixedly installed from top to bottom with a three-phase intelligent high-voltage disconnector, a three-phase intelligent drop-out fuse, an intelligent transformer, a three-phase intelligent low-voltage circuit breaker and an intelligent controller, a wind vane is arranged on the side of the three-phase intelligent high-voltage disconnector, the wind vane comprises a resistor body and a wind vane rotating shaft brush rotatingly contacting the resistor body, the wind vane rotating shaft brush forms a voltage division circuit by sliding on the inner surface of the resistor body, the wind vane is connected with the intelligent controller through an angle-to-voltage signal, and the intelligent controller is connected with the three-phase intelligent high-voltage disconnector, the three-phase intelligent drop-out fuse, the three-phase intelligent low-voltage circuit breaker and the oil temperature and pressure sensor in the intelligent transformer.

[0007] Based on the above, the intelligent pole-mounted transformer platform complete equipment and control method solve the problems in the prior art, such as the safety risk caused by relying on manual operation, the hidden danger discovery lag caused by lack of real-time state monitoring, and the long power outage time caused by difficult fault positioning, and overcome the defects in the prior art, such as the phase-to-phase short circuit risk caused by not considering the influence of wind direction on electric arc, the lack of key parameter monitoring caused by not integrating a high-precision sensing unit, and the repair delay caused by insufficient fault response mechanism. 1、The intelligent controller, the driving signal and the closing and opening signal of the three-phase intelligent high-voltage disconnector, the three-phase intelligent drop-out fuse and the three-phase intelligent low-voltage circuit breaker are connected, the intelligent controller can receive remote or on-site instructions, 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 closing and opening operations through the driving signal, without manual operation on the electric pole, remote and on-site 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 are realized, manual closing and opening operation in adverse environments such as night, heavy rain and strong wind is avoided, the risk of electric shock and falling is significantly reduced, and personal safety is ensured; 2. The application realizes real-time online monitoring of key operating parameters of the equipment by real-time collection of high-voltage loop current, voltage, temperature of the contact point of the upper contact of the fuse and transformer oil temperature and oil pressure signals through the electronic current sensor and the electronic voltage sensor in the insulating support of the intelligent drop-out fuse, the temperature measuring element integrated in the fuse tube end cover of the fuse element and the oil temperature and oil pressure sensor in the intelligent transformer, and transmission of the signals to the intelligent controller, and the intelligent controller can analyze the data in time, and give an early warning or automatically execute a protection action when detecting abnormalities such as heating of the contact, over-temperature of the transformer, abnormal oil pressure and over-current, so that hidden dangers can be found and handled in the early stage and prevented from developing into serious accidents; 3. The application realizes precise and rapid positioning of the fault point by sending a fault alarm signal containing GPS positioning information of the equipment to the background master station through the 4G module of the intelligent controller immediately after the intelligent controller executes a protection action such as over-current tripping or over-temperature tripping or receives a tripping instruction triggered by a fault signal, without the need for on-site step-by-step troubleshooting by repair personnel, so that the background master station can obtain accurate position information of the faulty equipment in the first time, greatly shortening the fault finding time and gaining time for the rapid dispatch of repair teams, thereby significantly shortening the user power outage time and improving the power supply reliability; 4. The application realizes the one-key sequence control function based on real-time wind direction by angle-to-voltage signal connection of the wind vane and the intelligent controller and drive control logic of the intelligent high-voltage disconnecting switch and the intelligent drop-out fuse of the intelligent controller, specifically: the wind vane detects the wind direction in real time and converts it into a voltage signal input to the intelligent controller, the intelligent controller determines the current wind direction interval (0°<θ≤90°, 90°<θ≤180°, 180°<θ≤270°, 270°<θ≤360°) according to the output voltage (V out ), thereby determining the specific identity of the upwind phase, the downwind phase and the intermediate phase corresponding to the A phase, the B phase and the C phase, and strictly following the closing and opening sequence requirements based on the wind direction, sending step-by-step drive signals to the intelligent high-voltage disconnecting switch and the intelligent drop-out fuse of the three phases, thereby realizing the one-key sequence control function based on real-time wind direction, automatically selecting the optimal phase sequence operation sequence in the closing and opening operation, guiding the electric arc away from the live phase or the closed phase by the wind direction, effectively avoiding the phase-to-phase short circuit accident caused by the drift of the electric arc, and ensuring the safety of the equipment and the power grid; 5、The application directly integrates the key components inside by using the low-power coil LPCT electronic current sensor in the insulating support of the intelligent drop-out fuse, the electronic voltage sensor adopting the capacitor voltage division principle, the temperature measuring element of the magnetic coupling RFID tag integrated in the fuse tube end cover of the fuse element, and the oil temperature and pressure sensor in the intelligent transformer, and high-precision and real-time collection of core parameters such as high-voltage current, high-voltage voltage, fuse contact point temperature, and transformer oil temperature and pressure is realized, so that high-precision and real-time online monitoring of key operating parameters of the power distribution network is realized, the shortcomings of traditional equipment in this regard are made up, and reliable data basis is provided for equipment state evaluation, fault early warning, and automatic protection. 6、The application realizes the response mechanism combining the rapid automatic isolation of the fault and the immediate active reporting of the fault point information through the real-time monitoring logic of the intelligent controller to the signals of the electronic current sensor, the temperature measuring element, and the oil temperature and pressure sensor, the automatic triggering mechanism of the GPS positioning module and the 4G communication module integrated in the intelligent controller, the continuous analysis of the sensor signals by the intelligent controller, the automatic output of the opening command to the intelligent drop-out fuse to execute the protection trip as soon as the preset fault conditions such as the detection of the electronic current sensor that the current value exceeds 1.5 times of the rated current for 1 second, the detection of the temperature measuring element that the temperature is out of limit, and the abnormality of the oil temperature and pressure are detected, and the positioning information sending process is triggered at the same time, the fault alarm signal containing the GPS positioning information is actively pushed to the background master station through the 4G module, and the response mechanism combining the rapid automatic isolation of the fault and the immediate active reporting of the fault point information is realized. The mechanism starts at the moment of the fault occurrence, without manual discovery and reporting, so that the repair instruction and the position information can be sent to the background in the first time, the response time from the fault occurrence to the repair operation is greatly shortened, and the problem of repair delay caused by response delay is effectively solved.

[0008] Further, the intelligent high-voltage disconnector includes a mounting bracket, a closing drive motor fixed above the mounting bracket, two support insulators symmetrically installed below the two sides of the mounting bracket, an isolation switch installed between the two support insulators, and a first insulating pull rod connecting the output end of the closing drive motor and the isolation switch, and the axial movement direction of the first insulating pull rod is perpendicular to the closing plane of the isolation switch.

[0009] Based on the above, the mounting bracket has the beneficial effects of mounting the closing drive motor and the support insulator; the closing drive motor has the beneficial effect of driving the first insulating pull rod to move linearly, replacing manual operation, and controlling the opening and closing actions of the isolation switch in an electric manner to meet the requirements of remote control and one-key sequence control; and the isolation switch has the beneficial effect of realizing the physical breaking function of the high-voltage loop conduction and isolation, and the opening and closing states are fed back to the intelligent controller through the position signal to provide the basis for state confirmation for the sequence control logic.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] Based on the above, the beneficial effects of the electronic voltage sensor are that the voltage signal acquisition is realized by adopting the capacitor voltage division principle, two coaxially arranged electronic voltage sensors are connected through a conversion module, the accurate measurement of the high-voltage side voltage is realized, and real-time voltage data is provided for the intelligent controller; the beneficial effects of the electronic current sensor are that the real-time monitoring of the high-voltage side current is realized, and the protection action is triggered when the detected current exceeds the set value; the beneficial effects of the conductive insert are that the reliable electrical connection between the electronic current sensor and the upper contact is realized, and the mechanical strength is ensured; the beneficial effects of the epoxy resin integrated casting are that the high-strength fixation and overall insulation protection of the internal elements are realized; and the beneficial effects of the weather-resistant silicone rubber layer are that the moisture-proof, contamination-proof and ultraviolet protection of the internal electronic elements are realized, and the long-term stable operation of the equipment in the outdoor harsh environment is ensured.

[0014] Further, the fuse element comprises a fuse tube, a fuse tube end cover fixed to the upper end of the fuse tube, a fuse wire arranged in the fuse tube, and a fuse tube lower fixing element arranged at the lower end of the fuse tube, the fuse tube end cover is embedded with a temperature measuring element, and the outer surface of the fuse tube end cover is slidably buckled on the inner wall of the upper contact.

[0015] Based on the above, the beneficial effects of the fuse tube are that the fuse wire is accommodated and the fuse tube end cover and the fuse tube lower fixing element are connected, the mechanical support and arc isolation functions of the fuse are realized; the beneficial effects of the fuse tube end cover are that the real-time monitoring of the contact point temperature of the upper contact and the reliable electrical connection between the fuse element and the upper contact are realized; the beneficial effects of the fuse wire are that the fuse is melted to cut off the circuit under the condition of overcurrent, and the basic overcurrent protection function is provided; the beneficial effects of the fuse tube lower fixing element are that the lower end of the fuse element is fixed and supported, and the electrical connection with the lower contact is realized; and the beneficial effects of the temperature measuring element are that the magnetic coupling RFID tag structure is adopted, the temperature of the contact point of the upper contact is measured, and the temperature signal is transmitted to the intelligent controller.

[0016] Further, when the electronic current sensor detects that the current value exceeds 1.5 times of the rated current for 1 second, the intelligent controller outputs a tripping instruction to the intelligent drop-out fuse.

[0017] Further, the three-phase intelligent high-voltage disconnector, the three-phase intelligent drop-out fuse and the three-phase intelligent low-voltage circuit breaker all transmit the on-off position signals to the intelligent controller, and the intelligent controller transmits the driving signals to the three-phase intelligent high-voltage disconnector, the three-phase intelligent drop-out fuse and the three-phase intelligent low-voltage circuit breaker, respectively.

[0018] Further, the application further provides a control method of the intelligent pole-mounted transformer station complete equipment, comprising the following steps: S1. Power transmission control: after receiving the closing instruction, the intelligent controller determines the closing sequence according to the angle of the wind vane and the voltage signal, drives the three-phase intelligent high-voltage disconnecting switch to be closed in the order of the upper wind phase, the lower wind phase and the middle phase, confirms that the three-phase intelligent high-voltage disconnecting switch is closed, drives the three-phase intelligent drop-out fuse to be closed in the same wind phase order, confirms that the three-phase intelligent drop-out fuse is closed, and drives the three-phase intelligent low-voltage circuit breaker to be closed; S2. Power transmission control: after receiving the closing instruction, the intelligent controller determines the closing sequence according to the angle of the wind vane and the voltage signal, drives the three-phase intelligent high-voltage disconnecting switch to be closed in the order of the upper wind phase, the lower wind phase and the middle phase, confirms that the three-phase intelligent high-voltage disconnecting switch is closed, drives the three-phase intelligent drop-out fuse to be closed in the same wind phase order, confirms that the three-phase intelligent drop-out fuse is closed, and drives the three-phase intelligent low-voltage circuit breaker to be closed; S3. Protection control: the intelligent controller monitors the overcurrent signal of the electronic current sensor, the temperature signal of the temperature measuring element and the oil temperature and pressure signal of the oil temperature and pressure sensor in real time, and outputs the opening instruction to the intelligent drop-out fuse when any signal exceeds the threshold value; S4. Fault positioning: after the opening instruction is triggered, the intelligent controller sends the GPS positioning information to the master station through the 4G module.

[0019] Further, define V in as the input voltage, V out as the output voltage, and θ as the rotation angle of the wind vane, the voltage division value of the wind vane satisfies the relationship V out =V in ×θ / 360°.

[0020] Further, in steps S1-S2, the phase located on the west side is defined as the A phase, the phase located in the middle is defined as the B phase, and the phase located on the east side is defined as the C phase, wherein 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°, V out ≤1 / 4V in At this time, the upper wind phase is the C phase, the lower wind phase is the A phase, and the middle phase is the B phase, and the closing sequence is C phase, A phase and B phase, and the opening sequence is B phase, A phase and C phase; When the wind direction angle θ satisfies 90°<θ≤180°, 1 / 4V in <V out ≤1 / 2V inAt this time, the upper wind phase is phase A, the lower wind 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; When the wind direction angle θ satisfies 180° < θ ≤ 270°, 1 / 2V in <V out ≤ 3 / 4V in At this time, the upper wind phase is phase A, the lower wind 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; When the wind direction angle θ satisfies 270° < θ ≤ 360°, 3 / 4V in <V out ≤ V in At this time, the upper wind phase is phase C, the lower wind 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.

[0021] In order to make the above features of the present application and the purposes to be achieved more clearly, the present application is further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the transformer frame of the present application; Figure 2 It is a side view of the present application; Figure 3 It is a schematic view of the wind vane of the present application; Figure 4 It is a schematic view of the intelligent high-voltage disconnector of the present application; Figure 5 It is a schematic view of the intelligent drop-out fuse of the present application; Figure 6 It is a schematic view of the insulating support of the present application; Figure 7 It is a schematic view of the fusing member of the present application; Figure 8 It is a sectional view of the end cover of the fuse tube of the present application; Figure 9 It is a phase schematic view of the intelligent drop-out fuse of the present application; Figure 10 It is a signal connection diagram of the present application; Figure 11 It is a control method flow chart of the present application. Explanation of reference numerals: 1-intelligent high-voltage disconnector, 11-mounting bracket, 12-closing drive motor, 13-supporting insulator, 14-isolating switch, 15-first insulating pull rod, 2-intelligent drop-out fuse, 21-fuse opening and closing motor, 22-insulating support, 221-electronic voltage sensor, 222-conversion module, 223-electronic current sensor, 224-conductive insert, 23-fuse element, 231-fuse tube, 232-fuse tube end cover, 2321-temperature measuring element, 2322-ring-shaped hook, 233-fuse, 234-fuse tube lower fixing element, 24-upper contact, 25-lower contact, 26-transmission mechanism, 27-second insulating pull rod, 3-vane, 31-resistor body, 32-vane rotating shaft brush, 4-intelligent transformer, 5-intelligent low-voltage circuit breaker, 6-intelligent controller, 100-transformer stand. DETAILED DESCRIPTION

[0023] Reference Figures 1-11 shown, The application provides an intelligent pole-mounted transformer stand complete equipment, which comprises a transformer stand 100, wherein three-phase intelligent high-voltage disconnectors 1, three-phase intelligent drop-out fuses 2, an intelligent transformer 4, three-phase intelligent low-voltage circuit breakers 5 and an intelligent controller 6 are sequentially and fixedly installed on the transformer stand 100 from top to bottom, a vane 3 is arranged on the side of the three-phase intelligent high-voltage disconnectors 1, the vane 3 comprises a resistor body 31 and a vane rotating shaft brush 32 which is rotatably contacted in the resistor body 31, the vane rotating shaft brush 32 is in surface contact and sliding in the resistor body 31 to form a voltage division circuit, the vane 3 is connected with the intelligent controller 6 through an angle-to-voltage signal, and the intelligent controller 6 is connected with an oil temperature and pressure sensor signal in the intelligent transformer 4, the three-phase intelligent high-voltage disconnectors 1, the three-phase intelligent drop-out fuses 2 and the three-phase intelligent low-voltage circuit breakers 5 respectively.

[0024] In the embodiment, the intelligent high-voltage disconnector 1 comprises a mounting bracket 11, a closing drive motor 12 fixed above the mounting bracket 11, two supporting insulators 13 symmetrically installed below both sides of the mounting bracket 11, an isolating switch 14 arranged between the two supporting insulators 13 and a first insulating pull rod 15 connecting an output end of the closing drive motor 12 and the isolating switch 14, and the axial movement direction of the first insulating pull rod 15 is perpendicular to the closing plane of the isolating switch 14.

[0025] In the embodiment, the intelligent drop-out fuse 2 comprises a fuse opening and closing motor 21, a vertically installed insulating support 22, a fuse 23, an upper contact 24 arranged at the upper end of the insulating support 22, a lower contact 25 arranged at the lower end of the insulating support 22, a transmission mechanism 26 hingedly connected at one end to the outer end of the lower contact 25, and a second insulating pull rod 27 arranged at the output end of the fuse opening and closing motor 21, the other end of the second insulating pull rod 27 being hingedly connected to the middle part of the transmission mechanism 26, the lower end of the fuse 23 being buckle-mounted on the transmission mechanism 26, the upper end of the fuse 23 being connected to the extension rod of the transmission mechanism 26 through a ring-shaped hook 2322, and the upper end of the fuse 23 being slidingly engaged in the upper contact 24.

[0026] In the embodiment, the insulating support 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 at the top of the electronic voltage sensor 221 at the upper end, and a conductive insert 224 arranged at the side of the electronic current sensor 223, the electronic voltage sensor 221 adopting a capacitive voltage division principle, wherein the internal capacitor adopts a thin film capacitor, the electronic current sensor 223 adopts a low-power coil LPCT, the other end of the conductive insert 224 being 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 being integrally formed by epoxy resin pouring, and being externally coated with a weather-resistant silicone rubber layer.

[0027] In the embodiment, the fuse 23 comprises a fuse tube 231, a fuse tube end cover 232 fixed at the upper end of the fuse tube 231, a fuse wire 233 arranged in the fuse tube 231, and a fuse tube lower fixing member 234 arranged at the lower end of the fuse tube 231, the fuse tube end cover 232 being embedded with a temperature measuring element 2321, the temperature measuring element 2321 being a magnetic coupling RFID tag composed of an ultra-low-power temperature measuring sensor chip and a tag antenna coil, the tag antenna coil adopting an anti-metal structure, and the surface of the tag antenna coil being provided with a ferrite material to reduce the short-circuit effect of the electromagnetic field by more than 80%, the outer surface of the fuse tube end cover 232 being slidingly buckled on the inner wall of the upper contact 24.

[0028] In the 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 tripping instruction to the intelligent drop-out fuse 2.

[0029] In the embodiment, the three-phase intelligent high-voltage disconnecting switch 1, the three-phase intelligent drop-out fuse 2 and the three-phase intelligent low-voltage circuit breaker 5 all transmit the closing signal to the intelligent controller 6, and the intelligent controller 6 transmits the driving signal to the three-phase intelligent high-voltage disconnecting switch 1, the three-phase intelligent drop-out fuse 2 and the three-phase intelligent low-voltage circuit breaker 5 respectively.

[0030] The application further discloses a control method of the intelligent pole-mounted transformer platform complete equipment. S1. Power transmission control: after receiving the closing instruction, 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 disconnecting switch 1 to be closed in sequence in the order of the upper wind phase, the lower wind phase and the intermediate phase, confirms the closing of the three-phase intelligent high-voltage disconnecting switch 1, drives the three-phase intelligent drop-out fuse 2 to be closed in sequence 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 be closed. S2. Power cut-off control: after receiving the opening instruction, the intelligent controller 6 drives the three-phase intelligent low-voltage circuit breaker 5 to be opened, confirms the opening of the three-phase intelligent low-voltage circuit breaker 5, determines the opening sequence according to the angle-to-voltage signal of the wind vane 3, drives the three-phase intelligent drop-out fuse 2 to be opened in sequence in the order of the intermediate phase, the lower wind phase and the upper wind phase, confirms the opening of the three-phase intelligent drop-out fuse 2, and drives the three-phase intelligent high-voltage disconnecting switch 1 to be opened. 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, and outputs the opening instruction to the intelligent drop-out fuse 2 when any signal exceeds the threshold value. S4. Fault positioning: after the opening instruction is triggered, the intelligent controller 6 sends the GPS positioning information to the master station through the 4G module.

[0031] In the embodiment, V in is defined as the input voltage, V out is defined as the output voltage, and θ is the rotation angle of the wind vane, and the voltage division value of the wind vane 3 satisfies the relationship V out = V in × θ / 360°.

[0032] In steps S1-S2 of the embodiment, the phase located on the west side is defined as the A phase, the phase located in the middle is defined as the B phase, and the phase located on the east side is defined as the C phase, wherein 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 intermediate phase is the B phase between the A phase and the C phase. 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 intermediate 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; 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 intermediate 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; 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 intermediate 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; 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, the intermediate 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.

[0033] In summary, the specific embodiments of the present application are: In the power transmission process, after the intelligent controller 6 receives the closing instruction, the angle rotation voltage signal is obtained through the wind vane brush 32 rotating in the voltage division circuit formed in the resistance body 31 of the wind vane 3, the output voltage V out is compared with the input voltage V inThe ratio relationship of the wind direction flag 3 determines the wind direction interval and determines the three-phase closing sequence as: the upper wind phase, the lower wind phase and the middle phase. The intelligent controller 6 sends a drive signal to the closing drive motor 12 of the three-phase intelligent high-voltage disconnecting switch 1, the closing drive motor 12 pushes the isolation knife switch 14 through the first insulating pull rod 15 to complete the closing operation. After the isolation knife switch 14 of each phase is closed, the closing drive motor 12 feeds back a closing signal to the intelligent controller 6. When the closing signals of the three-phase intelligent high-voltage disconnecting switch 1 are all confirmed, the intelligent controller 6 sends a drive signal to the fuse opening and closing motor 21 of the three-phase intelligent drop-out fuse 2 according to the same wind phase sequence, the fuse opening and closing motor 21 drives the transmission mechanism 26 through the second insulating pull rod 27, and the upper end of the fuse 23 is slidably clamped into the upper contact 24 to complete the closing according to the three-phase sequence. After the fuse opening and closing motor 21 of each phase is closed, the intelligent controller 6 feeds back a closing signal. When the closing signals of the three-phase intelligent drop-out fuse 2 are all confirmed, the intelligent controller 6 drives the three-phase intelligent low-voltage circuit breaker 5 to sequentially close according to the sequence; In the power-off process, after the intelligent controller 6 receives the opening command, it first sends an opening signal to the three-phase intelligent low-voltage circuit breaker 5, and after the three-phase intelligent low-voltage circuit breaker 5 is opened, it feeds back an opening signal to the intelligent controller 6. The intelligent controller 6 determines the wind direction interval according to the V out signal of the wind direction flag 3, determines the three-phase opening sequence as: the middle phase, the lower wind phase and the upper wind phase, and sends an opening drive signal to the fuse opening and closing motor 21. The fuse opening and closing motor 21 of the three-phase intelligent drop-out fuse 2 pulls the transmission mechanism 26 through the second insulating pull rod 27, and the upper end of the fuse 23 is slidably clamped into the upper contact 24 to complete the opening according to the three-phase sequence. After each phase is opened, the fuse opening and closing motor 21 feeds back an opening signal to the intelligent controller 6. When the opening signals of the three-phase intelligent drop-out fuse 2 are all confirmed, the intelligent controller 6 drives the closing drive motor 12 of the three-phase intelligent high-voltage disconnecting switch 1 to pull open the isolation knife switch 14 through the first insulating pull rod 15 to complete the opening according to the sequence; In the operation monitoring process, the electronic current sensor 223 in the insulating support 22 collects current signals in real time. When it is detected that the current exceeds 1.5 times the rated current for 1 second, an overcurrent signal is immediately sent to the intelligent controller 6. At the same time, the temperature measuring element 2321 in the fuse tube end cover 232 inducts temperature changes through the LC resonance loop composed of 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 pressure sensor in the intelligent transformer 4 transmits oil temperature and pressure data to the intelligent controller 6 in real time; In the protection 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 pressure sensor signal, and when any parameter exceeds the set threshold value, the intelligent controller 6 immediately outputs a tripping instruction to the fuse opening and closing motor 21 to execute protection tripping; In the fault positioning process, the intelligent controller 6 automatically sends the GPS positioning information to the master station through the 4G module at the same time when the opening instruction is triggered. When the fuse 23 is caused to drop due to overcurrent fusing, the intelligent controller 6 synchronously uploads the fault positioning information to the master station.

[0034] The above only describes the optimal solution embodiment of the present application and is not used to limit the present application. Various modifications or replacements of the present application made by those skilled in the art without departing from the essence and protection scope of the present application should be within the protection scope of the present application.

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, and 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), and an oil temperature and pressure sensor in the intelligent transformer (4).

2. The intelligent pole transformer platform complete equipment according to claim 1, characterized in that: 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), and the axial movement direction of the first insulating pull rod (15) is perpendicular to the closing plane of the isolation knife switch (14).

3. The intelligent pole transformer platform complete equipment according to claim 1, characterized in that: 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) arranged at the upper end of the insulating support column (22), a lower contact (25) arranged at 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) arranged at the output end of the fuse opening and closing motor (21), one 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 (2322), and the upper end of the fuse (23) is slidingly fitted in the upper contact (24).

4. The intelligent pole transformer platform complete equipment according to claim 3, 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.

5. The intelligent pole transformer platform complete equipment according to claim 4, 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).

6. The intelligent distribution transformer platform of claim 4, wherein: 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 tripping command to the intelligent drop-out fuse (2).

7. The intelligent pole transformer platform 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.

8. A control method applied to the intelligent pole-mounted transformer station complete equipment of claim 5, 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 instruction to the intelligent drop-out fuse (2); S4. Fault location: after the tripping instruction is triggered, the intelligent controller (6) sends the GPS positioning information to the master station through the 4G module.

9. The control method of the intelligent transformer substation equipment according to claim 8, characterized in that: Definition V in is an input voltage, V out is an output voltage, θ is a rotation angle of a wind vane, and a voltage division value of the wind vane (3) satisfies a relationship V out = V in × θ / 360°.

10. The control method of the intelligent pole transformer platform complete equipment according to claim 8, characterized in that: In steps S1-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. 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°, V out ≤1 / 4V in At this time, the upwind phase is phase C, the downwind phase is phase A, the intermediate 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; When the wind direction angle θ satisfies 90° < θ ≤ 180°, 1 / 4V in < V out ≤ 1 / 2V in At this time, the upper phase is phase A, the lower phase is phase C, the middle phase is phase B, the closing sequence is phase A, phase C and phase B, and the opening sequence is phase B, phase C and phase A. 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 intermediate phase is phase B, the closing sequence is phase A, phase C and phase B, and the opening sequence is phase B, phase C and phase A. When the wind direction angle θ satisfies 270° < θ≤ 360°, 3 / 4V in < V out ≤ V in At this time, the upper phase is the C phase, the lower phase is the A phase, the middle phase is the B phase, the closing sequence is the C phase, the A phase and the B phase, and the opening sequence is the B phase, the A phase and the C phase.

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