CN213521403U

CN213521403U - Host device of low-voltage transformer area topology rapid identification instrument

Info

Publication number: CN213521403U
Application number: CN202022050310.8U
Authority: CN
Inventors: 王永生; 张自变; 耿树军; 邓士伟; 苗青
Original assignee: Jiangsu Zhizhen Energy Technology Co ltd
Current assignee: Jiangsu Zhizhen Energy Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-06-22
Anticipated expiration: 2030-09-18

Abstract

The utility model relates to a host computer device of low pressure platform district topology quick identification appearance, including voltage acquisition circuit, voltage filter circuit, current acquisition circuit, current filter circuit, power module, MCU microcontroller and 4G communication module, AC380V voltage interface links to each other with voltage acquisition circuit's input, and voltage acquisition circuit's output links to each other with voltage filter circuit's input, and voltage filter circuit output links to each other with MCU microcontroller's voltage signal input, and voltage filter circuit output supplies power to each unit through power module; the input end of the current acquisition circuit is connected with the current transformer interface, the output end of the current acquisition circuit is connected with the input end of the current filter circuit, and the output end of the current filter circuit is connected with the current signal input end of the MCU microcontroller; and the signal output end of the MCU microcontroller is in signal connection with the master station server through the 4G communication module. The device can solve the problem that the topological relation of the low-voltage transformer area is not clear, and meets the requirement of quickly identifying the topological structure.

Description

Host device of low-voltage transformer area topology rapid identification instrument

Technical Field

The utility model relates to a host computer device of low pressure platform district topology quick identification appearance belongs to smart power grids, intelligent power consumption technical field.

Background

Many old cells and remote areas in China have the problems of disordered power project filing and uncertain platform area topology. At present, due to the fact that a plurality of low-voltage transformer areas lack accurate line topological relation graphs, when a line breaks down, the problem that rapid and accurate troubleshooting is difficult to achieve exists, and the problems of low troubleshooting efficiency, long period and high cost exist. A large amount of manpower, material resources and financial resources are wasted, and the final problem cannot be effectively solved. For the problem, a common practice in the prior art is to provide the topology data of the transformer area, which is saved during the construction of the transformer area, by a power supply department. However, the power distribution areas of the power company are large in quantity and complex in electrical wiring, and a private building phenomenon also exists, and especially for some old districts and remote areas, due to the reasons that various load adjustments are not filed and adjusted in time and the registration is wrong, the original topological relation information obtained from the power supply department during the building of the power distribution areas is usually incomplete and unreliable.

The reason for the topological relation error of the low-voltage transformer area mainly has three aspects: (1) a user ammeter file error is caused during the construction of the low-voltage transformer area, so that a low-voltage transformer area topology error is caused; (2) insufficient attention is paid to the transformer area, only partial transformer area information is recorded in the building process, and topology information of some low-voltage transformer areas is lost; (3) when the low-voltage transformer area has faults, no record or error record is generated when wiring is adjusted in routing inspection and first-aid repair, so that the low-voltage transformer area topology error is caused.

In order to solve the problem of unclear platform area topology, many power companies and power supply departments have started some testing work on perfecting platform area profiling and defining platform area topology relations.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a host computer device of low pressure platform district topology quick identification appearance, its concrete technical scheme as follows: the intelligent power supply comprises an AC380V voltage interface, a current transformer interface, a voltage acquisition circuit, a voltage filter circuit, a current acquisition circuit, a current filter circuit, a power module, an MCU microcontroller and a 4G communication module, wherein the AC380V voltage interface is connected with the input end of the voltage acquisition circuit, the output end of the voltage acquisition circuit is connected with the input end of the voltage filter circuit, the output end of the voltage filter circuit is connected with the voltage signal input end of the MCU microcontroller, and the output end of the voltage filter circuit provides power for each unit of a host through the power module; the input end of the current acquisition circuit is connected with the current transformer interface, the output end of the current acquisition circuit is connected with the input end of the current filter circuit, and the output end of the current filter circuit is connected with the current signal input end of the MCU microcontroller; and the signal output end of the MCU microcontroller is in signal connection with the master station server through the 4G communication module.

Furthermore, the signal output end of the MCU microcontroller is also connected with the liquid crystal display.

Further, the 4G communication module includes an isolator chip (U5) and a 4G interface (P5), pin 1 of the 4G interface is connected to pin 2, and is connected to +12V voltage through an inductor B4, pin 3 and pin 4 are connected in parallel to ground GND2, pin 5 is connected to an output signal terminal TXDM through a resistor RT2, pin 7 is connected to an output signal terminal SETM through a resistor RT3, pin 8 is connected to an input signal terminal RXDM through a resistor RT4, pin 9 is connected to an input signal terminal RSTM through a resistor RT5, and pin 10 is connected to an output signal terminal STAM through a resistor RT 6.

Further, the isolator chip (U5) inputs 3.3V voltage through a pin 1, the pin 1 is grounded through a voltage stabilizing capacitor C3, a pin 2 is connected with an input signal terminal PWR PD 04G of the MCU, a pin 3 is connected with an input signal terminal TX PC 104G of the MCU, a pin 4 is connected with an input signal terminal PD 24G of the MCU, a pin 6 is connected with an input signal terminal UART3 RX PC11 of the MCU, and a pin 7 is connected with an input signal terminal LINK PC 124G of the MCU; pin 10 is connected with output signal terminal STAM, pin 11 is connected with output signal terminal TXDM, pin 13 is connected with input signal terminal RSTM, pin 14 is connected with input signal terminal RXDM, pin 15 is connected with output signal terminal SETM, pin 15 inputs +5V voltage and is grounded through voltage stabilizing capacitor C30; the output signal terminal STAM, the output signal terminal TXDM, the input signal terminal RSTM, the input signal terminal RXDM and the output signal terminal SETM are respectively connected with a +5V power supply through 10K omega resistors.

Further, the voltage acquisition circuit comprises a transformer PT1, a transformer PT2 and a transformer PT3, wherein a primary winding of the transformer PT1 is connected with A-phase alternating current, a secondary winding of the transformer PT1 is connected with a voltage signal end Ua1, and two ends of the secondary winding are connected with a thermistor RB13 in parallel; the primary winding of the transformer PT2 is connected with B alternating current, the secondary winding of the transformer PT2 is connected with a voltage signal end Ub1, and two ends of the secondary winding are connected with a thermistor RB14 in parallel; the primary winding of the transformer PT3 is connected with C alternating current, the secondary winding of the transformer PT3 is connected with a voltage signal end Uc1, and a thermistor RB15 is connected in parallel with the two ends of the secondary winding.

Further, in the voltage filter circuit, the voltage signal terminal Ua1 is grounded through a zener diode T1, the voltage signal terminal Ub1 is grounded through a zener diode T2, and the voltage signal terminal Uc1 is grounded through a zener diode T3; the voltage signal end Ua1 is connected with the voltage signal end Ua1 'through a resistor R1 and a resistor R20 which are connected in series, the resistor R1 and the resistor R20 are grounded through a filter capacitor C1, and the resistor R20 and the voltage signal end Ua 1' are grounded through a filter capacitor C20; the voltage signal end Ub1 is connected with a voltage signal end Ub1 'through a resistor R2 and a resistor R21 which are connected in series, the resistor R2 and the resistor R21 are grounded through a filter capacitor C2, and the resistor R21 and the voltage signal end Ub 1' are grounded through a filter capacitor C21; the voltage signal end Uc1 is connected with the voltage signal end Uc1 'through a resistor R3 and a resistor R22 which are connected in series, the resistor R3 and the resistor R22 are grounded through a filter capacitor C3, and the resistor R22 and the voltage signal end Uc 1' are grounded through a filter capacitor C22.

Further, the current transformer interface is equipped with three groups and is the PBK socket, and wherein two sets of current transformer interfaces link to each other with corresponding current transformer adapter box 2 through PAG sheath plug connecting wire 1 respectively, and every current transformer adapter box 2 of group inserts the outgoing line electric current of three pincerlike mutual-inductors respectively.

Furthermore, in the current filter circuit, each path of current input signal adopts second-order RC filtering.

Further, a PA0 port of the MCU microcontroller is connected with the voltage signal end Ua1 ', a PA1 port is connected with the voltage signal end Ub1 ', and a PA2 port is connected with the voltage signal end Uc1 '; the PA 2-PA 7 port, the PB0 port, the PB1 port, the PC0 port and the PC1 port are respectively connected with the filtered current signal input ends.

The utility model has the advantages that: 1. installing a host device of the low-voltage transformer area topology rapid identification instrument near a concentrator or an outgoing line cabinet, and testing the current of the concentrator or the outgoing line cabinet by using a current transformer; voltage signals are collected through a voltage interface of the AC380V, filtered respectively and then provided to the MCU for operation, and power change of the power grid of the transformer area is monitored in real time. The identification instrument slave machine is arranged near the user meter box, the master station server sends an instruction to the identification instrument slave machine to start triggering, and the identification instrument slave machine generates a specific power pulse waveform after triggering; and meanwhile, the master station server sends an instruction to the host device through the 4G communication module to prepare for capturing, the host device identifies according to the characteristic waveform triggered by the slave, and the identification result is uploaded to the master station server through the 4G communication module.

2. And if the master device captures the power pulse waveform triggered by the slave, the user meter box where the slave is located is under the topological structure of the transformer or outlet cabinet corresponding to the master device. And if the master device does not capture the power pulse waveform triggered by the slave, the user meter box where the slave is located is not under the topological structure of the transformer or outlet cabinet corresponding to the master device. The host device judges whether a meter box in which the slave is located is under a station transformer or outlet cabinet topological structure corresponding to the host by acquiring and testing whether the power variation of a concentrator or an outlet cabinet meets the specific waveform variation triggered by the slave on the basis of a load identification technology, and can identify the topological relation between the 'station-transformer' and the 'station-line-transformer' of a low-voltage station area. The 'household-transformer' refers to the relation between a user meter box and a low-voltage transformer. The 'household-line-transformer' refers to the relationship among a user meter box, an outgoing line cabinet and a low-voltage transformer.

3. The 380V alternating-current voltage of a three-phase four-wire system is input to a voltage acquisition circuit through a voltage interface of an AC380V, a voltage signal Ua, Ub and Uc is output after the voltage of the phase voltage Ua is reduced by a transformer PT1, a voltage signal Ua1 is output after the voltage of the phase voltage Ub is reduced by a transformer PT2, a voltage signal Ub1 is output after the voltage of the phase voltage Uc is reduced by a transformer PT3, a voltage signal Uc1 is output, and voltages Ua1 ', Ub1 ' and Uc1 ' are output through a second-order filter circuit; the voltage signals Ua1 ', Ub1 ' and Uc1 ' are input into the MCU microcontroller through pins PA0, PA1 and PA2 of the MCU respectively. And each input bus voltage AC220V is converted into a weak voltage signal which can be identified by the micro-controller MCU, so that the micro-controller MCU can collect and calculate.

4. The current acquisition circuit converts the input current signal into a weak voltage signal which can be identified by the MCU for the MCU to acquire and calculate. And the third current transformer interface can simply and conveniently test the current signal input by the concentrator through the open current transformer (3 channels). The current transformer adapter boxes 2 can be used for testing the outgoing line cabinet at the same time, and each group of current transformer adapter boxes 2 is connected with three pincerlike transformers to test the outgoing line current of the outgoing line cabinet. The PBK socket and the PAG plug have the functions of push-pull self-locking and plug-pull integration, and have the characteristics of reliable contact and simple and convenient use. And the current signal is input into the MCU through second-order RC filtering for power operation. The voltage filter circuit and the current filter circuit can filter out interference signals, so that the input voltage and current signals are real and reliable, and the power calculated by the MCU is more accurate.

5. The power supply module converts the input AC220V into low-voltage direct current voltage and provides working power supply for the MCU microcontroller, the 4G communication module and the liquid crystal display.

6. The liquid crystal display can display information such as the address of a host computer of the tester, the strength of a 4G signal, the working state and the like. The 4G communication module is used for the host device to carry out wireless communication with the master station server and uploading the result captured by the host and the like to the master station server.

7. The host device has compact structure and portable design, adopts large-size liquid crystal display on the front surface, has the advantages of 4G communication, multi-channel alternating current analog quantity and the like, is simple to install on site, and is easy to test; the voltage acquisition adopts quick aerial plug, 4-channel input, small volume, convenient plug and easy use; the current input adopts PBK socket and PAG plug, and the push-pull auto-lock, plug are integrative, have the contact reliable, convenient characteristics simple to use. The host has more current acquisition channels, small volume and convenient plugging, and meets the requirements of field multipath current acquisition; 2 groups of current transformer adapter boxes and 1 group of open-ended transformers are matched, 3 groups of 9 channels are provided, and 6 outgoing line cabinet currents and 3 concentrator currents can be tested simultaneously; the host device adopts a high-speed sampling design, the current and voltage acquisition speed is high, the precision is high, and the algorithm is easy to realize.

Drawings

FIG. 1 is a schematic block diagram of a host device of the low-voltage distribution area topology rapid identification instrument of the present invention,

FIG. 2 is a schematic diagram of a voltage acquisition circuit and a voltage filter circuit in the present invention,

FIG. 3 is a schematic diagram of the current collecting circuit and the current filtering circuit of the present invention,

figure 4 is a circuit diagram of the MCU microcontroller of the present invention,

figure 5 is a circuit diagram of the 4G communication module of the present invention,

fig. 6 is the connection structure diagram of the interface of the current transformer and the adapter box of the current transformer.

In fig. 6: PAG sheath plug connecting wire; 2. current transformer adapter box.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, the utility model discloses a host computer device of low pressure platform district topology quick identification appearance includes AC380V voltage interface, the current transformer interface, the voltage acquisition circuit, the voltage filter circuit, the current acquisition circuit, the current filter circuit, a power module, MCU microcontroller and LCD, wherein, the input of voltage acquisition circuit links to each other with AC380V voltage interface, the output of voltage acquisition circuit links to each other with the input of voltage filter circuit, the output of voltage filter circuit links to each other with MCU microcontroller's voltage signal input end, and the output of voltage filter circuit provides the power through power module to each unit of host computer; the input end of the current acquisition circuit is connected with the current transformer interface, the output end of the current acquisition circuit is connected with the input end of the current filter circuit, and the output end of the current filter circuit is connected with the current signal input end of the MCU microcontroller; and the signal output end of the MCU microcontroller is in signal connection with the master station server through the 4G communication module. And the signal output end of the MCU microcontroller is also connected with the liquid crystal display.

As shown in fig. 2, the voltage acquisition circuit comprises a transformer PT1, a transformer PT2 and a transformer PT3, wherein a primary winding of the transformer PT1 is connected with a-phase alternating current, a secondary winding of the transformer PT1 is connected with a voltage signal end Ua1, and two ends of the secondary winding are connected with a thermistor RB13 in parallel; the primary winding of the transformer PT2 is connected with B alternating current, the secondary winding of the transformer PT2 is connected with a voltage signal end Ub1, and two ends of the secondary winding are connected with a thermistor RB14 in parallel; the primary winding of the transformer PT3 is connected with C alternating current, the secondary winding of the transformer PT3 is connected with a voltage signal end Uc1, and a thermistor RB15 is connected in parallel with the two ends of the secondary winding.

In the voltage filter circuit, a voltage signal end Ua1 is grounded through a Zener diode T1, a voltage signal end Ub1 is grounded through a Zener diode T2, and a voltage signal end Uc1 is grounded through a Zener diode T3; the voltage signal end Ua1 is connected with the voltage signal end Ua1 'through a resistor R1 and a resistor R20 which are connected in series, the resistor R1 and the resistor R20 are grounded through a filter capacitor C1, and the resistor R20 and the voltage signal end Ua 1' are grounded through a filter capacitor C20; the voltage signal end Ub1 is connected with a voltage signal end Ub1 'through a resistor R2 and a resistor R21 which are connected in series, the resistor R2 and the resistor R21 are grounded through a filter capacitor C2, and the resistor R21 and the voltage signal end Ub 1' are grounded through a filter capacitor C21; the voltage signal end Uc1 is connected with the voltage signal end Uc1 'through a resistor R3 and a resistor R22 which are connected in series, the resistor R3 and the resistor R22 are grounded through a filter capacitor C3, and the resistor R22 and the voltage signal end Uc 1' are grounded through a filter capacitor C22. The voltage filter circuit can filter out interference signals, so that the input voltage signals are real and reliable, and the power calculated by the MCU is more accurate.

The 380V alternating-current voltage of a three-phase four-wire system is input to a voltage acquisition circuit through a voltage interface of an AC380V, a voltage signal Ua, Ub and Uc is output after the voltage of the phase voltage Ua is reduced by a transformer PT1, a voltage signal Ua1 is output after the voltage of the phase voltage Ub is reduced by a transformer PT2, a voltage signal Ub1 is output after the voltage of the phase voltage Uc is reduced by a transformer PT3, a voltage signal Uc1 is output, and voltages Ua1 ', Ub1 ' and Uc1 ' are output through a second-order filter circuit; the voltage signals Ua1 ', Ub1 ' and Uc1 ' are input into the MCU microcontroller through pins PA0, PA1 and PA2 of the MCU respectively. And each input bus voltage AC220V is converted into a weak voltage signal which can be identified by the micro-controller MCU, so that the micro-controller MCU can collect and calculate.

As shown in fig. 3 and 6, the current transformer interfaces are provided with three groups of PBK sockets, wherein the current transformer interface three passes through the open current transformer (3 channels), so that the current signal input by the concentrator can be simply and conveniently tested. The first current transformer interface and the second current transformer interface are respectively connected with corresponding current transformer adapter boxes 2 through PAG sheath plug connecting wires 1, and each group of current transformer adapter boxes 2 are respectively connected with outgoing currents of three pincerlike transformers. The current input adopts PBK socket and PAG plug, and the push-pull auto-lock, plug are integrative, have the contact reliable, convenient characteristics simple to use. The host has more current acquisition channels, small volume and convenient plugging, and meets the requirements of field multipath current acquisition; two sets of current transformer adapter boxes and 1 set of open-ended transformers are matched, and 3 sets of 9 channels are provided, so that six outgoing line cabinet currents and three concentrator currents can be tested simultaneously.

The current acquisition circuit converts the input current signal into a weak voltage signal which can be identified by the MCU for the MCU to acquire and calculate. In the current filter circuit, each path of current input signal adopts second-order RC filtering. The current filter circuit can filter out interference signals, so that input current signals are real and reliable, and the power calculated by the MCU is more accurate.

As shown in fig. 4, a PA0 port of the MCU microcontroller is connected to the voltage signal terminal Ua1 ', a PA1 port is connected to the voltage signal terminal Ub1 ', and a PA2 port is connected to the voltage signal terminal Uc1 '; the PA 2-PA 7 port, the PB0 port, the PB1 port, the PC0 port and the PC1 port are respectively connected with the filtered current signal input ends.

As shown in fig. 5, the 4G communication module includes an isolator chip U5 and a 4G interface P5, pin 1 of the 4G interface is connected to pin 2, and is connected to +12V voltage through an inductor B4, pin 3 and pin 4 are connected in parallel to ground GND2, pin 5 is connected to an output signal terminal TXDM through a resistor RT2, pin 7 is connected to an output signal terminal SETM through a resistor RT3, pin 8 is connected to an input signal terminal RXDM through a resistor RT4, pin 9 is connected to an input signal terminal RSTM through a resistor RT5, and pin 10 is connected to an output signal terminal STAM through a resistor RT 6.

The isolator chip U5 inputs 3.3V voltage through a pin 1, the pin 1 is grounded through a voltage stabilizing capacitor C3, a pin 2 is connected with an input signal terminal PWR PD 04G of the MCU, a pin 3 is connected with an input signal terminal TX PC 104G of the MCU, a pin 4 is connected with an input signal terminal PD 24G of the MCU, a pin 6 is connected with an input signal terminal UART3 RX PC11 of the MCU, and a pin 7 is connected with an input signal terminal LINK PC 124G of the MCU; pin 10 is connected with output signal terminal STAM, pin 11 is connected with output signal terminal TXDM, pin 13 is connected with input signal terminal RSTM, pin 14 is connected with input signal terminal RXDM, pin 15 is connected with output signal terminal SETM, pin 15 inputs +5V voltage and is grounded through voltage stabilizing capacitor C30; the output signal terminal STAM, the output signal terminal TXDM, the input signal terminal RSTM, the input signal terminal RXDM and the output signal terminal SETM are respectively connected with a +5V power supply through 10K omega resistors.

The power supply module converts the input AC220V into low-voltage direct current voltage and provides working power supply for the MCU microcontroller, the 4G communication module and the liquid crystal display. The liquid crystal display can display information such as the address of a host computer of the tester, the strength of a 4G signal, the working state and the like. The 4G communication module is used for the host device to carry out wireless communication with the master station server and uploading the result captured by the host and the like to the master station server.

Installing a host device of the low-voltage transformer area topology rapid identification instrument near a concentrator or an outgoing line cabinet, and testing the current of the concentrator or the outgoing line cabinet by using a current transformer; voltage signals are collected through a voltage interface of the AC380V, filtered respectively and then provided to the MCU for operation, and power change of the power grid of the transformer area is monitored in real time. The identification instrument slave machine is arranged near the user meter box, the master station server sends an instruction to the identification instrument slave machine to start triggering, and the identification instrument slave machine generates a specific power pulse waveform after triggering; and meanwhile, the master station server sends an instruction to the host device through the 4G communication module to prepare for capturing, the host device identifies according to the characteristic waveform triggered by the slave, and the identification result is uploaded to the master station server through the 4G communication module.

And if the master device captures the power pulse waveform triggered by the slave, the user meter box where the slave is located is under the topological structure of the transformer or outlet cabinet corresponding to the master device. And if the master device does not capture the power pulse waveform triggered by the slave, the user meter box where the slave is located is not under the topological structure of the transformer or outlet cabinet corresponding to the master device. The host device judges whether a meter box in which the slave is located is under a station transformer or outlet cabinet topological structure corresponding to the host by acquiring and testing whether the power variation of a concentrator or an outlet cabinet meets the specific waveform variation triggered by the slave on the basis of a load identification technology, and can identify the topological relation between the 'station-transformer' and the 'station-line-transformer' of a low-voltage station area. "Home-variant" refers to the relationship between a user meter box and a low voltage station variant. The 'household-line-transformer' refers to the relationship among a user meter box, an outgoing line cabinet and a low-voltage transformer.

To sum up, the utility model discloses can solve the undefined problem of low pressure platform district topological relation, satisfy the topological structure's in power company and the power supply department quick identification low pressure platform district needs.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A host computer device of low-voltage transformer district topology quick identification appearance, includes AC380V voltage interface and current transformer interface, its characterized in that: the power supply device comprises a voltage acquisition circuit, a voltage filter circuit, a current acquisition circuit, a current filter circuit, a power supply module, an MCU (microprogrammed control unit) microcontroller and a 4G communication module, wherein an AC380V voltage interface is connected with the input end of the voltage acquisition circuit, the output end of the voltage acquisition circuit is connected with the input end of the voltage filter circuit, the output end of the voltage filter circuit is connected with the voltage signal input end of the MCU microcontroller, and the output end of the voltage filter circuit supplies power to each unit of the host through the power supply module; the input end of the current acquisition circuit is connected with the current transformer interface, the output end of the current acquisition circuit is connected with the input end of the current filter circuit, and the output end of the current filter circuit is connected with the current signal input end of the MCU microcontroller; and the signal output end of the MCU microcontroller is in signal connection with the master station server through the 4G communication module.

2. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 1, characterized in that: and the signal output end of the MCU microcontroller is also connected with the liquid crystal display.

3. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 2, characterized in that: the 4G communication module comprises an isolator chip (U5) and a 4G interface (P5), wherein a pin 1 of the 4G interface is connected with a pin 2 and is connected with +12V voltage through an inductor B4, a pin 3 and a pin 4 are connected with a ground GND2 in parallel, a pin 5 is connected with an output signal end TXDM through a resistor RT2, a pin 7 is connected with an output signal end SETM through a resistor RT3, a pin 8 is connected with an input signal end RXDM through a resistor RT4, a pin 9 is connected with an input signal end RSTM through a resistor RT5, and a pin 10 is connected with an output signal end STATM through a resistor RT 6.

4. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 3, characterized in that: the isolator chip (U5) inputs 3.3V voltage through a pin 1, the pin 1 is grounded through a voltage stabilizing capacitor C3, a pin 2 is connected with an input signal end PWR PD 04G of the MCU, a pin 3 is connected with an input signal end TX PC 104G of the MCU, a pin 4 is connected with an input signal end PD 24G of the MCU, a pin 6 is connected with an input signal end UART3 RX PC11 of the MCU, and a pin 7 is connected with an input signal end LINK PC 124G of the MCU; pin 10 is connected with output signal terminal STAM, pin 11 is connected with output signal terminal TXDM, pin 13 is connected with input signal terminal RSTM, pin 14 is connected with input signal terminal RXDM, pin 15 is connected with output signal terminal SETM, pin 15 inputs +5V voltage and is grounded through voltage stabilizing capacitor C30; the output signal terminal STAM, the output signal terminal TXDM, the input signal terminal RSTM, the input signal terminal RXDM and the output signal terminal SETM are respectively connected with a +5V power supply through 10K omega resistors.

5. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 1, characterized in that: the voltage acquisition circuit comprises a transformer PT1, a transformer PT2 and a transformer PT3, wherein a primary winding of the transformer PT1 is connected with A-phase alternating current, a secondary winding of the transformer PT1 is connected with a voltage signal end Ua1, and two ends of the secondary winding are connected with a thermistor RB13 in parallel; the primary winding of the transformer PT2 is connected with B alternating current, the secondary winding of the transformer PT2 is connected with a voltage signal end Ub1, and two ends of the secondary winding are connected with a thermistor RB14 in parallel; the primary winding of the transformer PT3 is connected with C alternating current, the secondary winding of the transformer PT3 is connected with a voltage signal end Uc1, and a thermistor RB15 is connected in parallel with the two ends of the secondary winding.

6. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 5, characterized in that: in the voltage filter circuit, a voltage signal end Ua1 is grounded through a Zener diode T1, a voltage signal end Ub1 is grounded through a Zener diode T2, and a voltage signal end Uc1 is grounded through a Zener diode T3; the voltage signal end Ua1 is connected with the voltage signal end Ua1 'through a resistor R1 and a resistor R20 which are connected in series, the resistor R1 and the resistor R20 are grounded through a filter capacitor C1, and the resistor R20 and the voltage signal end Ua 1' are grounded through a filter capacitor C20; the voltage signal end Ub1 is connected with a voltage signal end Ub1 'through a resistor R2 and a resistor R21 which are connected in series, the resistor R2 and the resistor R21 are grounded through a filter capacitor C2, and the resistor R21 and the voltage signal end Ub 1' are grounded through a filter capacitor C21; the voltage signal end Uc1 is connected with the voltage signal end Uc1 'through a resistor R3 and a resistor R22 which are connected in series, the resistor R3 and the resistor R22 are grounded through a filter capacitor C3, and the resistor R22 and the voltage signal end Uc 1' are grounded through a filter capacitor C22.

7. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 2, characterized in that: the current transformer interface is equipped with three groups and is the PBK socket, and wherein two sets of current transformer interfaces link to each other with corresponding current transformer adapter box (2) through PAG sheath plug connecting wire (1) respectively, and every group current transformer adapter box (2) inserts the electric current of being qualified for the next round of competitions of three pincerlike mutual-inductors respectively.

8. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 7, characterized in that: in the current filter circuit, each path of current input signal adopts second-order RC filtering.

9. The host device of the low-voltage transformer area topology rapid identification instrument according to claim 6, characterized in that: a PA0 port of the MCU microcontroller is connected with the voltage signal end Ua1 ', a PA1 port is connected with the voltage signal end Ub1 ', and a PA2 port is connected with the voltage signal end Uc1 '; and a PA 2-PA 7 port, a PB0 port, a PB1 port, a PC0 port and a PC1 port of the MCU microcontroller are respectively connected with the filtered current signal input end.