A high voltage isolation device and method for a three-phase high voltage line controller

Abstract

The present invention relates to a high-voltage isolation device and method for a three-phase high-voltage line controller, which is applied to the field of high-voltage control technology, comprising: on the basis of a unified three-phase transformer, three groups of alternating currents with a preset voltage difference relative to each phase line are transformed by the transformer to power a control device, and one group of alternating currents with a preset voltage difference relative to the earth (neutral line) are transformed by the transformer to power a host; the host is communicatively connected with a controller on the three-phase line, and the controller on the three-phase line controls a switch device of the three-phase line in response to a control signal of the host, thereby avoiding the use of a withstand voltage insulation device in the prior art. Compared with the withstand voltage insulation device, the transformer is not affected by the model of the control device and is easier to unify, and the transformer has a lower cost than the withstand voltage insulation device.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage control, and in particular to a high-voltage isolation device and method for a three-phase high-voltage line controller. Background Art

[0002] With the development of intelligent power grid, the demand for intelligent control and signal acquisition equipment deployment of high-voltage lines is growing. In order to avoid damage to the controller caused by high voltage between the line and the ground and between the line phases, traditional power grid high-voltage controllers need to use a withstand voltage insulation device from the output end of the controller to the middle of the line. However, due to the diversity of control equipment, it is difficult to unify the withstand voltage insulation equipment, and the cost of the withstand voltage insulation equipment is relatively high. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a high-voltage isolation device and method for a three-phase high-voltage line controller to solve the problem in the prior art that a voltage-resistant insulating device is used from the output end of the controller to the middle of the line, and due to the diversity of control equipment, the voltage-resistant insulating equipment is difficult to unify and the cost of the voltage-resistant insulating equipment is high.

[0004] According to a first aspect of an embodiment of the present invention, a high-voltage isolation device for a three-phase high-voltage line controller is provided, the device comprising:

[0005] Transformer A1, transformer B1, transformer C1, transformer L4, controller A, controller B, controller C and host;

[0006] The input port of the transformer A1 is connected to the A phase line of the three-phase high-voltage line, the output port of the transformer A1 is connected to the live line of the power supply of the controller A, and the neutral line of the power supply of the controller A is connected to the A phase line of the three-phase high-voltage line, forming an A phase control loop of the three-phase high-voltage line;

[0007] The transformer A1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the A phase line of the three-phase high-voltage line to supply power to the controller A;

[0008] The controller A is also connected to a switch device A, and the switch device A is used to control the on and off of the A phase line of the three-phase high-voltage line;

[0009] The input port of the transformer B1 is connected to the B-phase line of the three-phase high-voltage line, the output port of the transformer B1 is connected to the live line of the power supply of the controller B, and the neutral line of the power supply of the controller B is connected to the B-phase line of the three-phase high-voltage line, forming a B-phase control loop of the three-phase high-voltage line;

[0010] The transformer B1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the B phase line of the three-phase high-voltage line to supply power to the controller B;

[0011] The controller B is also connected to a switch device B, and the switch device B is used to control the on and off of the B phase line of the three-phase high-voltage line;

[0012] The input port of the transformer C1 is connected to the C-phase line of the three-phase high-voltage line, the output port of the transformer C1 is connected to the live line of the power supply of the controller C, and the neutral line of the power supply of the controller C is connected to the C-phase line of the three-phase high-voltage line, forming a C-phase control loop of the three-phase high-voltage line;

[0013] The transformer C1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the C phase line of the three-phase high-voltage line to supply power to the controller C;

[0014] The controller C is also connected to a switch device C, and the switch device C is used to control the on and off of the C phase line of the three-phase high-voltage line;

[0015] The input port of the transformer L4 is connected to any one phase of the three-phase high-voltage line, the output port of the transformer L4 is connected to the live line of the host power supply, and the neutral line of the host power supply is connected to the neutral line of the three-phase high-voltage line to form a host control loop;

[0016] The transformer L4 is used to generate an alternating current with a voltage difference of a preset voltage value from the neutral line of the three-phase high-voltage line to power the host;

[0017] The host is respectively connected to controller A, controller B and controller C for sending control instructions to controller A, controller B and controller C. Controller A, controller B and controller C control corresponding switch devices according to the received control instructions.

[0018] Preferably,

[0019] The host is also used to receive the collected data of the three-phase line of the three-phase high-voltage line sent by the controller A, the controller B and the controller C.

[0020] Preferably,

[0021] The collected data includes temperature data corresponding to the three-phase line and a switch device status signal corresponding to the three-phase line.

[0022] Preferably,

[0023] The host is also wirelessly connected to a terminal, and the terminal is used to send a switch device control signal or a request to obtain collected data to the host;

[0024] After receiving the switch device control signal sent by the terminal, the host parses the switch device control signal to obtain control instructions of controller A, controller B and controller C, and sends the parsed control instructions to controller A, controller B and controller C accordingly;

[0025] The host is also used to package the temperature data and switch device status signals corresponding to the three-phase lines collected by controller A, controller B and controller C and send them to the terminal after receiving a request for obtaining collected data sent by the terminal. The terminal displays the received temperature data and switch device status signals corresponding to the three-phase lines on a display screen.

[0026] Preferably,

[0027] The controller A, controller B and controller C all include:

[0028] A temperature sensor, a first power module, a first main control module and a first Bluetooth module;

[0029] The first power supply module is used to power the temperature sensor, the first main control module and the first Bluetooth module through an alternating current whose voltage difference with the corresponding line is a preset voltage value;

[0030] The temperature sensor and the first Bluetooth module are respectively connected to the first main control module;

[0031] The first Bluetooth module is communicatively connected with the host;

[0032] The first main control module is connected to the corresponding switch device;

[0033] The temperature sensor is used to collect temperature data of the corresponding line;

[0034] The first Bluetooth module is used to receive the control instructions sent by the host and send them to the first main control module. The first main control module drives the corresponding switch device to control the on and off of the corresponding line according to the control instructions. The switch device is also used to return the switch device status signal of the corresponding line to the first main control module.

[0035] Preferably,

[0036] The host comprises:

[0037] A mobile network module, a second power module, a second main control module, a second Bluetooth module and a second temperature sensor;

[0038] The second power supply module is used to supply power to the mobile network module, the second main control module, the second Bluetooth module and the second temperature sensor through an alternating current whose voltage difference with the neutral line of the three-phase high-voltage line is a preset voltage value;

[0039] The second temperature sensor is used to collect the ambient temperature data of the host itself;

[0040] The mobile network module and the second Bluetooth module are respectively connected to the second main control module;

[0041] The mobile network module is connected to the terminal by wireless communication, and is used to receive a switch device control signal or a request for acquiring collected data sent by the terminal and forward it to the second main control module;

[0042] The second Bluetooth module is connected to the first Bluetooth module and is used to send the control instruction parsed by the second main control module to the first Bluetooth module.

[0043] According to a second aspect of an embodiment of the present invention, a high-voltage isolation method for a three-phase high-voltage line controller is provided. The method is based on a high-voltage isolation device for a three-phase high-voltage line controller as described in any one of the above, and the method includes:

[0044] The host installed on the neutral line of the three-phase high-voltage line obtains the switch device control signal sent by the terminal, and the host parses the switch device control signal to obtain the A-phase line control instruction, the B-phase line control instruction and the C-phase line control instruction of the three-phase high-voltage line respectively;

[0045] The host sends the A-phase line control instruction, the B-phase line control instruction and the C-phase line control instruction to the controllers installed on the A, B and C phases of the three-phase high-voltage line respectively;

[0046] The controller of the three-phase circuit A, B, C sends a switch device state signal to the switch device of the three-phase circuit A, B, C according to the received control instruction, and the switch device of the three-phase circuit A, B, C controls the on and off of the three-phase circuit A, B, C according to the switch device state signal;

[0047] The switch device of the A, B, C three-phase circuit returns a switch device state signal to the controller of the A, B, C three-phase circuit according to the on and off of the A, B, C three-phase circuit.

[0048] Preferably,

[0049] A transformer is respectively arranged on the three-phase lines A, B, C and the neutral line of the three-phase high-voltage line;

[0050] The transformer is used to reduce the voltage of the three-phase lines A, B, and C, thereby generating alternating currents with a voltage difference of a preset voltage value with the three-phase lines A, B, and C of the three-phase high-voltage line to supply power to the controllers provided on the three-phase lines A, B, and C;

[0051] The transformer on the neutral line of the three-phase high-voltage line draws power from any one of the three-phase lines A, B, and C and performs voltage reduction processing, thereby generating alternating current with a voltage difference of a preset voltage value with the neutral line of the three-phase high-voltage line to power the host.

[0052] Preferably,

[0053] The host receives a request for acquiring collected data sent by the terminal, and sends a data acquisition instruction to the controller on the A, B, and C three-phase lines according to the request for acquiring collected data;

[0054] The controller of the three-phase lines A, B, and C collects temperature data of the temperature sensors arranged on the respective lines and sends the data to the host; the controller of the three-phase lines A, B, and C also sends the switch device status signal returned by the switch device of the three-phase lines A, B, and C to the host;

[0055] The host sends the temperature data of the three-phase lines sent by the controller of the three-phase lines A, B, and C, the ambient temperature data of the host itself, and the state signal of the switch device of the three-phase lines A, B, and C to the terminal;

[0056] The terminal displays the received temperature data of the three-phase line, the ambient temperature data of the host and the status signal of the switch device of the three-phase line through a display screen.

[0057] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0058] The present application is based on a unified three-phase transformer, and the transformer transforms three groups of alternating currents with a preset voltage difference relative to each phase line to power the control device, and the transformer transforms one group of alternating currents with a preset voltage difference relative to the earth (neutral line) to power the host; the host is communicatively connected with the controller on the three-phase line, and the controller on the three-phase line controls the switch device of the three-phase line in response to the control signal of the host, thereby avoiding the use of the withstand voltage insulation device in the prior art. Compared with the withstand voltage insulation device, the transformer is not affected by the model of the control device, is easier to unify, and the transformer has a lower cost than the withstand voltage insulation device.

[0059] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0061] Figure 1is an overall system schematic diagram of a high-voltage isolation device of a three-phase high-voltage line controller according to an exemplary embodiment;

[0062] Figure 2 is a system schematic diagram of a controller according to another exemplary embodiment;

[0063] Figure 3 is a system schematic diagram of a host according to another exemplary embodiment;

[0064] Figure 4 is a flow chart of a high-voltage isolation method for a three-phase high-voltage line controller according to another exemplary embodiment;

[0065] In the accompanying drawings: 101-first main control module, 102-first power module, 103-first Bluetooth module, 104-first temperature sensor, 201-second main control module, 202-second power module, 203-second Bluetooth module, 204-mobile network module, 205-second temperature sensor, 3-terminal. DETAILED DESCRIPTION

[0066] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0067] Embodiment 1

[0068] Figure 1 is an overall system schematic diagram of a high-voltage isolation device of a three-phase high-voltage line controller according to an exemplary embodiment. Figure 1 As shown, the device comprises:

[0069] Transformer A1, transformer B1 and transformer C1 are respectively arranged on the three-phase circuits A, B and C of the three-phase high-voltage line. Taking transformer A1 as an example, the input port of transformer A1 is connected to the A-phase line of the three-phase high-voltage line, the output port of transformer A1 is connected to the live wire of the power supply of controller A, and the neutral wire of the power supply of controller A is connected to the A-phase line, thereby forming a loop. Transformer A1 is used to generate a voltage difference with the high-voltage line A for a preset voltage value, generally an AC 220V AC, to power the controller A, and the controller A is connected to the switch device A of the A-phase line, and the switch device A can control the on and off of the A-phase line. Transformer B1 and transformer C1 Similarly, the above scheme avoids the use of a withstand voltage insulation device in the prior art to prevent the high voltage of the high-voltage line from damaging the controller. Compared with the withstand voltage insulation device, the transformer is not affected by the model of the controller and has a lower cost. At the same time, the present application also takes power from any one of the three-phase lines A, B, and C and generates an alternating current with a voltage difference of a preset voltage value from the neutral line after voltage reduction processing by the transformer L4 to power the host. The host is communicated with the controllers A, B, and C respectively, and is used to send control instructions to the controller A, the controller B, and the controller C, and drive the corresponding switch device according to the received control instructions, thereby controlling the on and off of the corresponding line.

[0070] As attached Figure 2 As shown, the controllers A, B, and C in this application all include:

[0071] The first main control module 101, the first power module 102, the first Bluetooth module 103, and the first temperature sensor 104; wherein the first power module 102 supplies power to the first main control module 101, the first Bluetooth module 103, and the first temperature sensor 104 through the alternating current of a preset voltage value input by the transformer; the first temperature sensor 104 is arranged on a three-phase line, and collects temperature data of the three-phase lines A, B, and C respectively and sends the data to the first main control module 101; the first Bluetooth module 103 is connected to the host for communication, and is used to receive the control instruction sent by the host and forward it to the first main control module 101, and the first main control module 101 drives the corresponding switch device to control the on and off of the corresponding line according to the control instruction, and the switch device is also used to return the switch device status signal of the corresponding line to the first main control module 101; the first Bluetooth module 103 is also used to send the temperature data collected by the first temperature sensor 104 and the switch device status signal returned by the switch device to the host;

[0072] As attached Figure 3 As shown, the host in this application includes:

[0073] The second main control module 201, the second power supply module 202, the second Bluetooth module 203, the mobile network module 204, and the second temperature sensor 205; wherein, the second power supply module 202 supplies power to the second main control module 201, the second Bluetooth module 203, the mobile network module 204, and the second temperature sensor 205 through the AC power of the preset voltage value input by the transformer L4; the second temperature sensor 205 is arranged in the environment and is used to collect the ambient temperature of the environment where the host is located; the mobile network module 204 is remotely wirelessly connected to the terminal 3; the terminal 3 is used to send a switch device control signal or a request to obtain collected data to the second main control module 201 through the mobile network module 204; the terminal 3 can be a mobile phone, a computer, a tablet, etc.; after receiving the switch device control signal, the second main control module 201 parses the switch device control signal to obtain the control gears Ka, Kb, and Kc corresponding to the controllers A, B, and C; the second Bluetooth module 203 and The first Bluetooth module 103 is connected to forward the control gear positions Ka, Kb, Kc of the controllers A, B, C to the first main control module 101 of the controllers A, B, C respectively. The first main control module 101 sends a switch device status signal to the corresponding switch devices A, B, C according to the gear positions Ka, Kb, Kc; the second main control module 201 is also used to obtain the temperature data of the three-phase lines A, B, C collected by the first temperature sensor 104 forwarded by the first main control module 101 and the switch device status signal returned by the switch devices A, B, C through the second Bluetooth module 203 after receiving the request for obtaining collected data sent by the terminal 3. At the same time, the second main control module 201 also obtains the ambient temperature data collected by the second temperature sensor 205, packages the above-mentioned three-phase line temperature data, switch device status signal and ambient temperature, and sends them to the terminal 3 through the mobile network module 204. The terminal 3 displays the received data through the display screen.

[0074] Embodiment 2

[0075] Figure 4 is a flow chart of a high-voltage isolation method of a three-phase high-voltage line controller according to another exemplary embodiment, the method comprising:

[0076] S1, obtaining a switch device control signal sent by a terminal through a host installed on the neutral line of a three-phase high-voltage line, and the host parses the switch device control signal to obtain a phase A line control instruction, a phase B line control instruction, and a phase C line control instruction of the three-phase high-voltage line respectively;

[0077] S2, the host sends the A phase line control instruction, the B phase line control instruction and the C phase line control instruction to the controllers installed on the A, B and C phases of the three-phase high voltage line respectively;

[0078] S3, the controller of the three-phase circuit A, B, C sends a switch device state signal to the switch device of the three-phase circuit A, B, C according to the received control instruction, and the switch device of the three-phase circuit A, B, C controls the on and off of the three-phase circuit A, B, C according to the switch device state signal;

[0079] S4, the switch device of the A, B, C three-phase circuit returns a switch device state signal to the controller of the A, B, C three-phase circuit according to the on and off of the A, B, C three-phase circuit.

[0080] Understandably,

[0081] The switch device mentioned above may be an AC contactor, or a multi-way switch device gating device composed of multiple AC contactors, or a motor-driven mechanical switch device, etc.;

[0082] Understandably,

[0083] A transformer is respectively arranged on the three-phase lines A, B, C and the neutral line of the three-phase high-voltage line;

[0084] The transformer is used to reduce the voltage of the three-phase lines A, B, and C, thereby generating alternating currents with a voltage difference of a preset voltage value with the three-phase lines A, B, and C of the three-phase high-voltage line to supply power to the controllers provided on the three-phase lines A, B, and C;

[0085] The transformer on the neutral line of the three-phase high-voltage line takes power from any one of the three-phase lines A, B, and C and performs voltage reduction processing, thereby generating an alternating current with a voltage difference of a preset voltage value with the neutral line of the three-phase high-voltage line to power the host;

[0086] Understandably,

[0087] The transformers respectively arranged on the three-phase lines A, B, C and the neutral line of the three-phase high-voltage line can be a multi-phase high-voltage transformer composed of transformer A1, transformer B1, transformer C1 and transformer L4, and the transformers are high-voltage isolated. Since the multi-phase high-voltage transformer is a common device, it will not be described here in detail;

[0088] Understandably,

[0089] The host receives a request for acquiring collected data sent by the terminal, and sends a data acquisition instruction to the controller on the A, B, and C three-phase lines according to the request for acquiring collected data;

[0090] The controller of the three-phase lines A, B, and C collects temperature data of the temperature sensors arranged on the respective lines and sends the data to the host; the controller of the three-phase lines A, B, and C also sends the switch device status signal returned by the switch device of the three-phase lines A, B, and C to the host;

[0091] The host sends the temperature data of the three-phase lines sent by the controllers of the three-phase lines A, B, and C and the state signal of the switch device to the terminal;

[0092] The terminal displays the received temperature data of the three-phase line and the switch device status signal through a display screen.

[0093] Embodiment three:

[0094] This embodiment provides a storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a main controller, each step in the above method is implemented;

[0095] It is understandable that the storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0096] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0097] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0098] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0099] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0100] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0101] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0102] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0104] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high voltage isolation device for a three-phase high voltage line controller, characterized in that: The device comprises: Transformer A1, transformer B1, transformer C1, transformer L4, controller A, controller B, controller C and host; The input port of the transformer A1 is connected to the A phase line of the three-phase high-voltage line, the output port of the transformer A1 is connected to the live line of the power supply of the controller A, and the neutral line of the power supply of the controller A is connected to the A phase line of the three-phase high-voltage line, forming an A phase control loop of the three-phase high-voltage line; The transformer A1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the A phase line of the three-phase high-voltage line to supply power to the controller A; The controller A is also connected to a switch device A, and the switch device A is used to control the on and off of the A phase line of the three-phase high-voltage line; The input port of the transformer B1 is connected to the B-phase line of the three-phase high-voltage line, the output port of the transformer B1 is connected to the live line of the power supply of the controller B, and the neutral line of the power supply of the controller B is connected to the B-phase line of the three-phase high-voltage line, forming a B-phase control loop of the three-phase high-voltage line; The transformer B1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the B phase line of the three-phase high-voltage line to supply power to the controller B; The controller B is also connected to a switch device B, and the switch device B is used to control the on and off of the B phase line of the three-phase high-voltage line; The input port of the transformer C1 is connected to the C-phase line of the three-phase high-voltage line, the output port of the transformer C1 is connected to the live line of the power supply of the controller C, and the neutral line of the power supply of the controller C is connected to the C-phase line of the three-phase high-voltage line, forming a C-phase control loop of the three-phase high-voltage line; The transformer C1 is used to generate an alternating current with a voltage difference of a preset voltage value with respect to the C phase line of the three-phase high-voltage line to supply power to the controller C; The controller C is also connected to a switch device C, and the switch device C is used to control the on and off of the C phase line of the three-phase high-voltage line; The input port of the transformer L4 is connected to any one phase of the three-phase high-voltage line, the output port of the transformer L4 is connected to the live line of the host power supply, and the neutral line of the host power supply is connected to the neutral line of the three-phase high-voltage line to form a host control loop; The transformer L4 is used to generate an alternating current with a voltage difference of a preset voltage value from the neutral line of the three-phase high-voltage line to power the host; The host is respectively connected to controller A, controller B and controller C for sending control instructions to controller A, controller B and controller C. Controller A, controller B and controller C control corresponding switch devices according to the received control instructions.

2. The device according to claim 1, characterized in that The host is also used to receive the collected data of the three-phase line of the three-phase high-voltage line sent by the controller A, the controller B and the controller C.

3. The device according to claim 2, characterized in that The collected data includes temperature data corresponding to the three-phase line and a switch device status signal.

4. The device according to claim 3, characterized in that The host is also wirelessly connected to a terminal, and the terminal is used to send a switch device control signal or a request to obtain collected data to the host; After receiving the switch device control signal sent by the terminal, the host parses the switch device control signal to obtain control instructions of controller A, controller B and controller C, and sends the parsed control instructions to controller A, controller B and controller C accordingly; The host is also used to package and send to the terminal the temperature data corresponding to the three-phase lines collected by controllers A, B and C, the ambient temperature data of the host and the switch device status signal corresponding to the three-phase lines after receiving the request for obtaining collected data sent by the terminal. The terminal displays the received temperature data and switch device status signal on a display screen.

5. The device according to claim 4, characterized in that The controller A, controller B and controller C all include: A first temperature sensor, a first power module, a first main control module and a first Bluetooth module; The first power supply module is used to power the first temperature sensor, the first main control module and the first Bluetooth module through an alternating current whose voltage difference with the corresponding line is a preset voltage value; The first temperature sensor and the first Bluetooth module are respectively connected to the first main control module; The first Bluetooth module is communicatively connected with the host; The first main control module is connected to the corresponding switch device; The first temperature sensor is used to collect temperature data of the corresponding three-phase line; The first Bluetooth module is used to receive the control instructions sent by the host and send them to the first main control module. The first main control module drives the corresponding switch device to control the on and off of the corresponding line according to the control instructions. The switch device is also used to return the switch device status signal of the corresponding line to the first main control module.

6. The device according to claim 5, characterized in that The host comprises: A mobile network module, a second power module, a second main control module, a second Bluetooth module and a second temperature sensor; The second power supply module is used to supply power to the mobile network module, the second main control module, the second Bluetooth module and the second temperature sensor through an alternating current whose voltage difference with the neutral line of the three-phase high-voltage line is a preset voltage value; The second temperature sensor is used to collect the ambient temperature data of the host itself; The mobile network module and the second Bluetooth module are respectively connected to the second main control module; The mobile network module is connected to the terminal by wireless communication, and is used to receive a switch device control signal or a request for acquiring collected data sent by the terminal and forward it to the second main control module; The second Bluetooth module is connected to the first Bluetooth module and is used to send the control instruction parsed by the second main control module to the first Bluetooth module.

7. A high voltage isolation method for a three-phase high voltage line controller, characterized in that: The method is based on a high-voltage isolation device of a three-phase high-voltage line controller according to any one of claims 1 to 6, and the method comprises: The host installed on the neutral line of the three-phase high-voltage line obtains the switch device control signal sent by the terminal, and the host parses the switch device control signal to obtain the A-phase line control instruction, the B-phase line control instruction and the C-phase line control instruction of the three-phase high-voltage line respectively; The host sends the A-phase line control instruction, the B-phase line control instruction and the C-phase line control instruction to the controllers installed on the A, B and C phases of the three-phase high-voltage line respectively; The controller of the three-phase circuit A, B, C sends a switch device state signal to the switch device of the three-phase circuit A, B, C according to the received control instruction, and the switch device of the three-phase circuit A, B, C controls the on and off of the three-phase circuit A, B, C according to the switch device state signal; The switch device of the A, B, C three-phase circuit returns a switch device state signal to the controller of the A, B, C three-phase circuit according to the on and off of the A, B, C three-phase circuit.

8. The method according to claim 7, characterized in that A transformer is respectively arranged on the three-phase lines A, B, C and the neutral line of the three-phase high-voltage line; The transformer is used to reduce the voltage of the three-phase lines A, B, and C, thereby generating alternating currents with a voltage difference of a preset voltage value with the three-phase lines A, B, and C of the three-phase high-voltage line to supply power to the controllers provided on the three-phase lines A, B, and C; The transformer on the neutral line of the three-phase high-voltage line draws power from any one of the three-phase lines A, B, and C and performs voltage reduction processing, thereby generating alternating current with a voltage difference of a preset voltage value with the neutral line of the three-phase high-voltage line to power the host.

9. The method according to claim 8, characterized in that The host receives a request for acquiring collected data sent by the terminal, and sends a data acquisition instruction to the controller on the A, B, and C three-phase lines according to the request for acquiring collected data; The controller of the three-phase lines A, B, and C collects temperature data of the temperature sensors arranged on the respective lines and sends the data to the host; the controller of the three-phase lines A, B, and C also sends the switch device status signal returned by the switch device of the three-phase lines A, B, and C to the host; The host sends the temperature data of the three-phase lines sent by the controller of the three-phase lines A, B, and C, the ambient temperature data of the host itself, and the state signal of the switch device of the three-phase lines A, B, and C to the terminal; The terminal displays the received temperature data of the three-phase line, the ambient temperature data of the host and the status signal of the switch device of the three-phase line through a display screen.

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