CN212462888U

CN212462888U - Novel sending end topology signal self-adaptation system of topology identification system

Info

Publication number: CN212462888U
Application number: CN202021787370.1U
Authority: CN
Inventors: 芮胜骏; 刘海雄; 李仁进
Original assignee: Wuxi Sunplus Power Technology Co ltd
Current assignee: Wuxi Sunplus Power Technology Co ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-02-02
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a transmitting terminal topological signal self-adapting system of a novel topological recognition system, which relates to the technical field of transmitting terminal self-adapting of a power grid topological system, and comprises a data processing module, a topological signal generating module, a feedback acquisition module and a feedback signal processing module which are connected in sequence, wherein the feedback signal processing module is connected with the data processing module to form a closed loop feedback circuit, the topological signal generating module receives PWM waves transmitted by the data processing module and generates a topological recognition signal, the topological signal generating module is connected with a power grid, the power grid is connected with the data processing module and inputs a power grid signal, the feedback module acquires the topological recognition signal and carries out signal processing to obtain the feedback signal, the data processing module carries out compensation correction on the PWM waves according to the feedback signal and the power grid signal and transmits the PWM waves to the topological signal generating module for self-adapting adjustment, and obtains an expected topological, the self-adjustment enhances the self-adaptive capacity of the signal and can change the harmonic signal of the power grid.

Description

Novel sending end topology signal self-adaptation system of topology identification system

Technical Field

The utility model belongs to the technical field of the sending terminal self-adaptation technique of electric wire netting topological system and specifically relates to a novel topology identification system's sending terminal topological signal self-adaptation system.

Background

With the continuous development of the power network, new and old devices in the network are continuously alternated, and a power company is difficult to completely document a topological structure in the power network, so that a power network topology identification system is derived. However, the distance between the topology equipment of the transmitting end in the power network topology identification system and the branch line of the power grid is unstable, or the on-site environment causes that the desired topology identification signal cannot be obtained in the power grid, so that the self-adaptive capability of the topology signal of the transmitting end is poor.

SUMMERY OF THE UTILITY MODEL

The invention provides a transmitting end topological signal self-adaptive system of a novel topological identification system aiming at the problems and the technical requirements, the self-adaptive capacity of the topological identification signal is enhanced through the self-adjustment of a closed loop feedback circuit, and the harmonic signal of a power grid can be effectively changed.

The technical scheme of the utility model as follows:

a transmitting end topological signal self-adaptive system of a novel topological identification system comprises a power supply module, a data processing module, a topological signal generating module, a feedback acquisition module and a feedback signal processing module which are sequentially connected, wherein the feedback signal processing module is connected with the data processing module to form a closed loop feedback circuit, the topological signal generating module receives PWM waves transmitted by the data processing module and generates a topological identification signal, the topological signal generating module is connected with a power grid and inputs the topological identification signal to the power grid, the power grid is connected with the data processing module and inputs the power grid signal to the data processing module, the feedback acquisition module and the feedback signal processing module are used for acquiring the topological identification signal output by the topological signal generating module and processing the topological identification signal to obtain a feedback signal, the data processing module compensates and corrects the PWM waves according to the feedback signal and the power grid signal and transmits the PWM waves to the topological signal generating module for self, the expected topology identification signal is obtained by a closed loop feedback circuit.

The feedback acquisition module comprises a direct sampling circuit and a mutual inductor circuit, and when the distance between the topology signal generation module and a power grid branch line is less than a preset distance, the feedback acquisition module acquires a topology identification signal output by the topology signal generation module by adopting the direct sampling circuit; when the distance between the topology signal generating module and a power grid branch line is larger than the preset distance, the feedback acquisition module acquires the topology identification signal output by the topology signal generating module by adopting a mutual inductor circuit.

The direct sampling circuit comprises a plurality of diodes, a plurality of resistors, a plurality of capacitors and an optical coupler, wherein the anode of a first diode is connected between a topology signal generating module and a power grid live wire, the cathode of the first diode is grounded sequentially through resistors connected in series in three stages, the resistors connected in series in three stages form a voltage dividing circuit for obtaining a frequency voltage signal of a topology identification signal, the first end of the first capacitor is connected with the common end of a second-stage resistor and a third-stage resistor, the second end of the first capacitor is respectively connected with the first end of a fourth resistor and the first end of a second capacitor, the second end of the fourth resistor is grounded, the second end of the second capacitor is connected with the anode of a light emitter of the optical coupler, the anode of the light emitter of the optical coupler is grounded through a fifth resistor, the cathode of the light emitter of the optical coupler is connected with the anode of a second diode, the cathode of the second diode is grounded, and the cathode of the light, the collector electrode of the light receiver of the optical coupler is connected with the feedback signal processing module as a direct sampling signal collecting point after passing through the fourth capacitor, the emitter electrode of the light receiver of the optical coupler is grounded, and the optical coupler is used for isolating and converting frequency voltage signals.

The further technical scheme is that the mutual inductor circuit comprises a current mutual inductor and a sampling resistor, the current mutual inductor is connected between the topological signal generating module and a power grid live wire, a signal output end of the current mutual inductor is used as a mutual inductor sampling signal acquisition point and is respectively connected with a first end of the sampling resistor and the feedback signal processing module, and a second end of the sampling resistor is grounded.

The further technical scheme is that the feedback signal processing module comprises a filtering processing circuit, an amplifying circuit and a voltage raising circuit which are sequentially connected, the input end of the filtering processing circuit is used as the input end of the feedback signal processing module to be connected with the feedback acquisition module, the output end of the voltage raising circuit is used as the output end of the feedback signal processing module to be connected with the data processing module, and the feedback signal processing module receives the topology identification signal acquired by the feedback acquisition module and carries out filtering, amplifying and voltage raising processing.

The further technical scheme is that the filtering processing circuit comprises a high-pass filtering circuit and a low-pass filtering circuit which are connected;

the high-pass filter circuit is used for filtering low-frequency interference signals in topology identification signals lower than a preset cut-off frequency and comprises a first operational amplifier, a plurality of resistors and a fifth capacitor, the non-inverting input end of the first operational amplifier is connected with a feedback acquisition module through the fifth capacitor, the non-inverting input end of the first operational amplifier is grounded through a sixth resistor, the common end of the fifth capacitor and the feedback acquisition module is connected with the output end of the first operational amplifier through a seventh resistor, the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier through an eighth resistor, and the output end of the first operational amplifier is further connected with the input end of the low-pass filter circuit;

the low-pass filter circuit is used for filtering high-frequency interference signals in topology identification signals higher than a preset cut-off frequency and comprises a second operational amplifier, a plurality of resistors and a sixth capacitor, the non-inverting input end of the second operational amplifier is connected with the output end of the first operational amplifier through a ninth resistor, the non-inverting input end of the second operational amplifier is grounded through the sixth capacitor, the output end of the second operational amplifier is grounded through an eleventh resistor and a tenth resistor in sequence, the inverting input end of the second operational amplifier is connected with the common end of the eleventh resistor and the tenth resistor, and the output end of the second operational amplifier is connected with the input end of the amplifying circuit.

The technical scheme is that the amplifying circuit is used for amplifying the filtered topology identification signal and comprises a third operational amplifier, a plurality of resistors and capacitors, the non-inverting input end of the third operational amplifier is used as the input end of the amplifying circuit and connected with the filtering processing circuit, the output end of the third operational amplifier is grounded through a thirteenth resistor and a twelfth resistor in sequence, the output end of the third operational amplifier is connected with the inverting input end of the third operational amplifier through the common end of a seventh capacitor, the thirteenth resistor and the twelfth resistor in sequence, the output end of the third operational amplifier is grounded through an eighth capacitor, and the output end of the third operational amplifier is connected with the input end of the voltage raising circuit.

The further technical scheme is that the voltage raising circuit is used for raising the voltage of the amplified topology identification signal and comprises a fourth operational amplifier, a voltage stabilizer, a plurality of resistors and a capacitor, wherein the input end of the voltage stabilizer is connected with a power supply and is grounded through a ninth capacitor, the output end of the voltage stabilizer is divided into two paths for output, one path sequentially passes through a fourteenth resistor, the fifteenth resistor is connected with the non-inverting input end of the fourth operational amplifier, the other path of the non-inverting input end of the fourth operational amplifier is grounded through a tenth capacitor, the non-inverting input end of the fourth operational amplifier is used as the input end of the voltage raising circuit to be connected with the output end of the amplifying circuit after passing through the sixteenth resistor, the output end of the fourth operational amplifier is grounded through the eighteenth resistor and the seventeenth resistor in sequence, the inverting input end of the fourth operational amplifier is connected with the common end of the eighteenth resistor and the seventeenth resistor, and the output end of the fourth operational amplifier outputs a feedback signal and sends the.

The self-adaptive system further comprises a communication module, the data processing module is connected with an external port through the communication module, and the communication module comprises an RS485 chip and an RS232 chip which are respectively connected with corresponding communication interfaces of the data processing module; the self-adaptive system carries out firmware upgrading, system debugging and parameter setting through the communication module.

The adaptive system further comprises a signal indication LED lamp group connected with the data processing module, wherein the signal indication LED lamp group is used for five kinds of signal indication, a first signal indication LED circuit is used for indicating the running state of the data processing module, a second signal indication LED circuit is used for indicating the data receiving state of a receiving communication port of the communication module, a third signal indication LED circuit is used for indicating the data sending state of a sending communication port of the communication module, the circuit structures of the first signal indication LED circuit, the second signal indication LED circuit and the third signal indication LED circuit are the same, the anodes of the first light emitting diodes are connected with the data processing module, and the cathodes of the first light emitting diodes are grounded through a nineteenth resistor;

the fourth signal indication LED circuit is used for indicating the feedback signal condition of the feedback signal processing module, the fifth signal indication LED circuit is used for indicating the self-adaptive adjustment condition of the topology signal generation module, the fourth signal indication LED circuit and the fifth signal indication LED circuit are identical in circuit structure, the base stages of the triodes are connected with the data processing module through twenty resistors, the base stages of the triodes are grounded through twenty first resistors, the collector electrodes of the triodes are connected with the cathode of the second light emitting diode, the anode of the second light emitting diode is connected with the power supply through twenty twelve resistors, and the emitter electrodes of the triodes are grounded.

The utility model has the beneficial technical effects that:

the novel topology identification system is characterized in that a feedback acquisition module and a feedback signal processing module are additionally arranged in a sending end of the novel topology identification system to form a closed loop feedback circuit, the feedback acquisition module and the feedback signal processing module acquire topology identification signals output by a topology signal generation module and perform signal processing to obtain feedback signals, the data processing module performs compensation and correction on PWM waves according to the feedback signals and power grid signals, the PWM waves are sent to the topology signal generation module to perform self-adaptive adjustment, expected topology identification signals are obtained through the closed loop feedback circuit, and harmonic signals in the power grid are changed. Compared with the existing power network topology identification system, the self-adaptive capacity of the topology identification signal is enhanced, and harmonic signals in a power grid can be generated and changed; the feedback acquisition module is provided with a direct sampling circuit and a mutual inductor circuit, and a proper feedback acquisition module is selected according to the distance between the topology signal generation module and the branch line of the power grid to acquire the topology identification signal of the topology signal generation module; the feedback signal processing module is used for filtering, amplifying and voltage raising the topology identification signal to obtain an effective feedback signal which can be identified by the data processing module, so that the precision of the closed-loop feedback circuit is improved; the self-adaptive system can deal with different communication processing places by the communication module with two communication modes, so that the self-adaptive system can conveniently carry out firmware upgrading, system debugging and parameter setting; through setting up signal indication LED banks and being used for five kinds of signal indication, the operating personnel of being convenient for knows each module of self-adaptation system whether normally work.

Drawings

Fig. 1 is a schematic block diagram of a transmitting-end topology signal adaptive system provided in the present application.

Fig. 2 is a chip pin diagram of a data processing module provided in the present application.

Fig. 3 is a circuit diagram of a direct sampling circuit provided in the present application.

Fig. 4 is a schematic diagram of a connection between a transformer circuit and a feedback signal processing module provided in the present application.

Fig. 5 is a functional block diagram of a feedback signal processing module provided in the present application.

Fig. 6 is a circuit diagram of a high-pass filter circuit provided in the present application.

Fig. 7 is a circuit diagram of a low-pass filter circuit provided in the present application.

Fig. 8 is a circuit diagram of an amplifier circuit provided in the present application.

Fig. 9 is a circuit diagram of a voltage boosting circuit provided by the present application.

Fig. 10 is a schematic diagram of a communication module provided herein.

Fig. 11 is a circuit diagram of a signaling LED light bank provided herein.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

The application discloses a novel transmission end topological signal self-adaptive system of a topological recognition system, a schematic block diagram of the system is shown in figure 1, the system comprises a power supply module and a data processing module, a topological signal generating module, a feedback acquisition module and a feedback signal processing module which are sequentially connected, the feedback signal processing module is connected with the data processing module to form a closed loop feedback circuit, the topological signal generating module receives PWM waves transmitted by the data processing module and generates topological recognition signals, the frequency of the PWM waves can be controlled and adjusted according to actual requirements, the topological recognition signals are harmonic signals with certain frequency, the topological signal generating module is connected into a power grid and inputs the topological recognition signals into the power grid, the power grid is connected into the data processing module and inputs power grid signals into the data processing module, passive signal injection is adopted for a signal injection mode in a power network, and the feedback acquisition module and the feedback signal processing module are used for acquiring the topological recognition signals output by the topological signal The data processing module carries out compensation and correction on the PWM wave according to the feedback signal and the power grid signal, sends the PWM wave to the topology signal generating module for self-adaptive adjustment, obtains an expected topology identification signal through a closed-loop feedback circuit, and further changes a harmonic signal in the power grid.

The power module comprises an AC-DC converter, a DC-DC converter, a voltage stabilizer and the like, all of which are built by adopting the existing modules, and are not described herein any more, and the power module is used for supplying power to other modules of the self-adaptive system.

The data processing module of this application is realized based on STM32L431CBT6 chip, and the chip pin diagram is shown in fig. 2, and the data processing module provides functions such as signal control logic, feedback signal detection judgement, data conversion processing, output PWM waveform control correction, signal indication control, communicate with external port and debug data transmission for whole adaptive system operation.

Optionally, the topology signal generating module includes a control switch and a load corresponding thereto, and may be implemented by using an existing module, and an internal connection structure thereof is not described in detail herein, and the topology signal generating module is configured to generate and change a harmonic signal in the power grid.

The feedback acquisition module comprises a direct sampling circuit and a mutual inductor circuit, and when the distance between the topology signal generation module and a power grid branch line is smaller than a preset distance, the feedback acquisition module acquires a topology identification signal output by the topology signal generation module by adopting the direct sampling circuit. When the distance between the topology signal generating module and a power grid branch line is larger than a preset distance, the feedback acquisition module acquires the topology identification signal output by the topology signal generating module by adopting a mutual inductor circuit, wherein the preset distance is specifically set according to actual conditions.

Fig. 3 shows a circuit diagram of a direct sampling circuit, which is a low-end sampling circuit, and is generally disposed at a voltage connection of a topology signal generating module, and includes a plurality of diodes, a plurality of resistors, a plurality of capacitors, and an optical coupler U1. Specifically, the anode of the first diode D1 is connected between the topology signal generating module and the power grid live wire L, the cathode of the first diode D1 is grounded through three serially connected resistors (i.e. R1, R2, and R3) in sequence, the three serially connected resistors form a voltage dividing circuit for obtaining a frequency voltage signal of the topology identification signal, the first end of the first capacitor C1 is connected to the common end of the second resistor R2 and the third resistor R3, the second end of the first capacitor C1 is connected to the first end of the fourth resistor R4 and the first end of the second capacitor C2 respectively, the second end of the fourth resistor R4 is grounded, the second end of the second capacitor C2 is connected to the emitter anode pin 1 of the optocoupler U1, the emitter anode pin 1 of the optocoupler U1 is further grounded through the fifth resistor R5, the emitter cathode pin 2 of the optocoupler U1 is connected to the anode of the second diode D2, the cathode of the second diode D2 is grounded, and the emitter cathode pin 1 of the optocoupler U1 is further grounded through the third capacitor C3, the feedback signal processing module is connected as direct sampling signal acquisition point through fourth electric capacity C4 back as light receiver collector pin 4 of opto-coupler U1, and opto-coupler U1's light receiver emitter pin 3 ground connection, opto-coupler U1's light receiver pin 5 passes through resistance connection power VCC _1, and opto-coupler U1 is used for keeping apart conversion frequency voltage signal.

Fig. 4 shows a schematic connection diagram of the transformer circuit and the feedback signal processing module, the transformer circuit includes a current transformer 1 and a sampling resistor R23, the current transformer 1 is connected between the topology signal generating module and the power grid live wire L, a signal output end of the current transformer 1 is used as a transformer sampling signal acquisition point and is respectively connected with a first end of the sampling resistor R23 and the feedback signal processing module, and a second end of the sampling resistor R23 is grounded. The current signal collected by the current transformer 1 can enter the feedback signal processing module after being converted by the sampling resistor R23.

Fig. 5 shows a schematic block diagram of the feedback signal processing module, the feedback signal processing module includes a filtering processing circuit, an amplifying circuit and a voltage raising circuit, which are connected in sequence, an input end of the filtering processing circuit is connected to the feedback acquisition module as an input end of the feedback signal processing module, an output end of the voltage raising circuit is connected to the data processing module as an output end of the feedback signal processing module, and the feedback signal processing module receives the topology identification signal acquired by the feedback acquisition module and performs filtering, amplifying and voltage raising processing.

The filtering processing circuit comprises a high-pass filtering circuit and a low-pass filtering circuit which are connected, the high-pass filtering circuit is used for filtering low-frequency interference signals in the topology identification signals lower than the preset cut-off frequency, the circuit diagram of the filtering processing circuit is shown in fig. 6, the filtering processing circuit comprises a first operational amplifier U2, a plurality of resistors and a fifth capacitor C5, and the first operational amplifier U2 is realized based on the model LM 358M/TR. The non-inverting input end of the first operational amplifier U2 is connected with a direct sampling signal acquisition point of the feedback acquisition module or a mutual inductor sampling signal acquisition point through a fifth capacitor C5, the non-inverting input end of the first operational amplifier U2 is further grounded through a sixth resistor R6, the common end of the fifth capacitor C5 and the feedback acquisition module is connected with the output end OUT1 of the first operational amplifier U2 through a seventh resistor R7, the inverting input end of the first operational amplifier U2 is connected with the output end OUT1 of the first operational amplifier U2 through an eighth resistor R8, and the output end OUT1 of the first operational amplifier U2 is further connected with the input end of the low-pass filter circuit.

The low-pass filter circuit is used for filtering out high-frequency interference signals in the topology identification signal with the frequency higher than the preset cut-off frequency, and the circuit diagram of the low-pass filter circuit is shown in fig. 7, and the low-pass filter circuit comprises a second operational amplifier U3, a plurality of resistors and a sixth capacitor C6, wherein the second operational amplifier U3 is implemented based on the model LM2904DR 2G. The non-inverting input end of the second operational amplifier U3 is connected to the output end OUT1 of the first operational amplifier U2 through a ninth resistor R9, the non-inverting input end of the second operational amplifier U3 is further connected to the ground through a sixth capacitor C6, the output end OUT2 of the second operational amplifier U3 is connected to the ground through an eleventh resistor R11 and a tenth resistor R10 in sequence, the inverting input end of the second operational amplifier U3 is connected to the common end of the eleventh resistor R11 and the tenth resistor R10, and the output end OUT2 of the second operational amplifier U3 is further connected to the input end of the amplifying circuit.

The amplifying circuit is used for amplifying the filtered topology identification signal, and the circuit diagram of the amplifying circuit is shown in fig. 8, and the amplifying circuit comprises a third operational amplifier U4, a plurality of resistors and capacitors, wherein the third operational amplifier U4 is implemented based on the LMV321IDBVR model. The non-inverting input end of the third operational amplifier U4 is used as the input end of the amplifying circuit and is connected with the output end OUT2 of the filtering processing circuit, the output end OUT3 of the third operational amplifier U4 is connected to the ground through the thirteenth resistor R13 and the twelfth resistor R12 in sequence, the output end OUT3 of the third operational amplifier U4 is further connected to the inverting input end of the third operational amplifier U4 through the common end of the seventh capacitor C7, the thirteenth resistor R13 and the twelfth resistor R12 in sequence, the output end OUT3 of the third operational amplifier U4 is further connected to the ground through the eighth capacitor C8, and the output end OUT3 of the third operational amplifier U4 is further connected with the input end of the voltage raising circuit.

The voltage raising circuit is used for raising the voltage of the amplified topology identification signal, and a circuit diagram of the voltage raising circuit is shown in fig. 9, and the voltage raising circuit comprises a fourth operational amplifier U5, a voltage regulator U6, a plurality of resistors and a capacitor, wherein the fourth operational amplifier U5 is implemented based on an LM358S model, and the voltage regulator U6 is implemented based on an LN1134 chip. An input end VIN of the voltage stabilizer U6 is connected to a power supply VCC, and is grounded through a ninth capacitor C9, an output end VOUT of the voltage stabilizer U6 is divided into two paths of output, one path of output is connected with a non-inverting input end of a fourth operational amplifier U5 through a fourteenth resistor R14 and a fifteenth resistor R15 in sequence, the other path of output is grounded through a tenth capacitor C10, the non-inverting input end of the fourth operational amplifier U5 is connected with an output end OUT3 of the amplifying circuit as an input end of the voltage raising circuit after passing through a sixteenth resistor R16, the output end of the fourth operational amplifier U5 is grounded through an eighteenth resistor R18 and a seventeenth resistor R17 in sequence, an inverting input end of the fourth operational amplifier U5 is connected with a common end of the eighteenth resistor R18 and the seventeenth resistor R17, and the output end of the fourth operational amplifier U5 outputs a.

Optionally, the adaptive system further includes a communication module, as shown in fig. 10, the data processing module is connected to an external port (such as a PC or other communication device) through the communication module, and the communication module includes an RS485 chip and an RS232 chip, which are respectively connected to the corresponding communication interfaces TX/RX of the data processing module. The self-adaptive system carries out firmware upgrading, system debugging and parameter setting through the communication module, and the two communication modes are convenient for adapting to different communication interfaces. The RS485 chip is realized based on an SIT485EESA chip, and the RS232 chip is realized based on an ST232ECDR chip.

Optionally, the adaptive system further includes a signal indication LED lamp set connected to the data processing module, a circuit diagram of which is shown in fig. 11, the signal indication LED lamp set is used for five signal indications, and the first signal indication LED circuit is used for indicating an operation status of the data processing module. The second signal indicates the LED circuit to indicate the data receiving condition of the receiving communication port of the communication module, and the third signal indicates the LED circuit to indicate the data sending condition of the sending communication port of the communication module, i.e. whether the data is received or not. The circuit structures of the first signal indication LED circuit, the second signal indication LED circuit and the third signal indication LED circuit are the same, in the first signal indication LED circuit, the anode of the first light emitting diode LED1 is connected with the LED1 pin of the data processing module, and the cathode is grounded through a nineteenth resistor R19.

The fourth signal indication LED circuit is used for indicating the feedback signal condition of the feedback signal processing module, namely whether the feedback circuit part works normally or not and whether signal feedback can be carried out normally or not. The fifth signal indication LED circuit is used for indicating the adaptive adjustment status of the topology signal generation module, that is, checking whether the topology signal generation module can output the adaptive adjustment signal after receiving the correction signal. The fourth signal indication LED circuit and the fifth signal indication LED circuit have the same circuit structure, in the fourth signal indication LED circuit, the base stage of the triode Q1 is connected with the LED4 pin of the data processing module through a twentieth resistor R20 and is grounded through a twenty-first resistor R21, the collector electrode of the triode Q1 is connected with the cathode of the second light emitting diode LED4, the anode of the second light emitting diode LED4 is connected with the power supply VCC _ LED through a twenty-second resistor R22, and the emitter electrode of the triode is grounded. Optionally, this application does not restrict the instruction state of signal indication LED banks, as long as can realize distinguishing whether the operating condition of each module is normal or not, for example, the bright red light of LED indicates that this module that corresponds is abnormal, the bright green light indicates that the module is normal, or the bright red light of LED indicates that this module that corresponds is normal, the scintillation indicates that this module is abnormal.

The topology identification signal is transmitted by the topology signal self-adaptive system at the transmitting end, and the topology identification signal is received and identified by the receiving end of the topology identification system through power line transmission, so that the whole operation of the power grid topology system is completed. The application mainly discloses a transmitting end topological signal self-adaptive system of a novel topological identification system, and in the self-adaptive system, expected waveform signal injection in a power grid is completed through self-detection and self-adjustment of topological identification signals.

What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.

Claims

1. A transmitting end topological signal self-adaptive system of a novel topological identification system is characterized in that the self-adaptive system comprises a power supply module, and a data processing module, a topological signal generating module, a feedback acquisition module and a feedback signal processing module which are connected in sequence, the feedback signal processing module is connected with the data processing module to form a closed loop feedback circuit, the topology signal generating module receives the PWM wave sent by the data processing module and generates a topology identification signal, the topology signal generating module is connected to a power grid and inputs the topology identification signal to the power grid, the power grid is connected to the data processing module and inputs a power grid signal to the data processing module, the feedback acquisition module and the feedback signal processing module are used for acquiring the topology identification signal output by the topology signal generation module and carrying out signal processing to obtain a feedback signal.

2. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 1, wherein the feedback acquisition module comprises a direct sampling circuit and a transformer circuit, and when the distance between the topology signal generation module and the branch line of the power grid is less than a preset distance, the feedback acquisition module acquires the topology identification signal output by the topology signal generation module by using the direct sampling circuit; when the distance between the topology signal generating module and a power grid branch line is larger than a preset distance, the feedback acquisition module acquires the topology identification signal output by the topology signal generating module by adopting the mutual inductor circuit.

3. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 2, wherein the direct sampling circuit comprises a plurality of diodes, a plurality of resistors, a plurality of capacitors and an optical coupler, an anode of the first diode is connected between the topology signal generating module and a power grid line, a cathode of the first diode is grounded via a resistor connected in series with three stages in sequence, the resistor connected in series with three stages constitutes a voltage dividing circuit for obtaining a frequency voltage signal of the topology identification signal, a first end of the first capacitor is connected to a common end of the second stage resistor and the third stage resistor, a second end of the first capacitor is connected to a first end of the fourth resistor and a first end of the second capacitor respectively, a second end of the fourth resistor is grounded, a second end of the second capacitor is connected to an anode of a light emitter of the optical coupler, and an anode of the light emitter of the optical coupler is further grounded via a fifth resistor, the utility model discloses a frequency voltage signal processing module, including opto-coupler, second diode, feedback signal processing module, fourth electric capacity, feedback signal processing module, opto-coupler's illuminator negative pole, second diode's positive pole is connected to the illuminator negative pole of opto-coupler, the negative pole ground connection of second diode, the illuminator negative pole of opto-coupler still is through third electric capacity ground connection, the photic ware collecting electrode of opto-coupler passes through the fourth electric capacity back and connects as direct sampling signal acquisition point feedback signal processing module, the photic ware projecting pole ground.

4. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 2, wherein the transformer circuit comprises a current transformer and a sampling resistor, the current transformer is connected between the topology signal generating module and a power grid live wire, a signal output end of the current transformer is used as a transformer sampling signal acquisition point and is respectively connected with a first end of the sampling resistor and the feedback signal processing module, and a second end of the sampling resistor is grounded.

5. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 1, wherein the feedback signal processing module includes a filtering processing circuit, an amplifying circuit and a voltage raising circuit connected in sequence, an input end of the filtering processing circuit is used as an input end of the feedback signal processing module to connect to the feedback acquisition module, an output end of the voltage raising circuit is used as an output end of the feedback signal processing module to connect to the data processing module, and the feedback signal processing module receives the topology identification signal acquired by the feedback acquisition module and performs filtering, amplifying and voltage raising processing.

6. The transmitting-end topology signal adaptive system of the novel topology identification system according to claim 5, wherein the filter processing circuit comprises a high-pass filter circuit and a low-pass filter circuit connected with each other;

the high-pass filter circuit is used for filtering low-frequency interference signals in topology identification signals lower than a preset cut-off frequency and comprises a first operational amplifier, a plurality of resistors and a fifth capacitor, the non-inverting input end of the first operational amplifier is connected with the feedback acquisition module through the fifth capacitor, the non-inverting input end of the first operational amplifier is grounded through a sixth resistor, the common end of the fifth capacitor and the feedback acquisition module is connected with the output end of the first operational amplifier through a seventh resistor, the inverting input end of the first operational amplifier is connected with the output end of the first operational amplifier through an eighth resistor, and the output end of the first operational amplifier is connected with the input end of the low-pass filter circuit;

the low-pass filter circuit is used for filtering high-frequency interference signals in topology identification signals higher than a preset cut-off frequency and comprises a second operational amplifier, a plurality of resistors and a sixth capacitor, wherein the non-inverting input end of the second operational amplifier is connected with the output end of the first operational amplifier through a ninth resistor, the non-inverting input end of the second operational amplifier is grounded through the sixth capacitor, the output end of the second operational amplifier is grounded through an eleventh resistor and a tenth resistor in sequence, the inverting input end of the second operational amplifier is connected with the common end of the eleventh resistor and the tenth resistor, and the output end of the second operational amplifier is connected with the input end of the amplifying circuit.

7. The transmitting-end topology signal adaptation system of the novel topology identification system according to claim 5, the topology identification circuit is characterized in that the amplifying circuit is used for amplifying the filtered topology identification signal and comprises a third operational amplifier, a plurality of resistors and capacitors, the non-inverting input end of the third operational amplifier is used as the input end of the amplifying circuit and is connected with the filtering processing circuit, the output end of the third operational amplifier is grounded through a thirteenth resistor and a twelfth resistor in sequence, the output end of the third operational amplifier is also connected with the inverting input end of the third operational amplifier through the common end of a seventh capacitor, the thirteenth resistor and a twelfth resistor in turn, the output end of the third operational amplifier is grounded through an eighth capacitor, and the output end of the third operational amplifier is connected with the input end of the voltage raising circuit.

8. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 5, wherein the voltage raising circuit is used for raising the voltage of the amplified topology identification signal, and comprises a fourth operational amplifier, a voltage regulator, a plurality of resistors and capacitors, the input end of the voltage regulator is connected to a power supply and grounded through a ninth capacitor, the output end of the voltage regulator is divided into two paths of output, one path of output is connected to the non-inverting input end of the fourth operational amplifier through a fourteenth resistor and a fifteenth resistor in sequence, the other path of output is grounded through a tenth capacitor, the non-inverting input end of the fourth operational amplifier is connected to the output end of the amplifying circuit as the input end of the voltage raising circuit through a sixteenth resistor, the output end of the fourth operational amplifier is grounded through an eighteenth resistor and a seventeenth resistor in sequence, and the inverting input end of the fourth operational amplifier is connected with the common end of the eighteenth resistor and the seventeenth resistor, and the output end of the fourth operational amplifier outputs the feedback signal and sends the feedback signal to the data processing module.

9. The transmitting end topology signal adaptive system of the novel topology identification system according to claim 1, wherein the adaptive system further comprises a communication module, the data processing module is connected to an external port through the communication module, the communication module comprises an RS485 chip and an RS232 chip, and the communication modules are respectively connected to corresponding communication interfaces of the data processing module; the self-adaptive system carries out firmware upgrading, system debugging and parameter setting through the communication module.

10. The transmitting-end topology signal adaptation system of the new topology identification system of claim 9, characterized in that the self-adaptive system also comprises a signal indication LED lamp group connected with the data processing module, the signal indication LED lamp set is used for five signal indications, a first signal indication LED circuit is used for indicating the running state of the data processing module, a second signal indication LED circuit is used for indicating the data receiving state of a receiving communication port of the communication module, a third signal indication LED circuit is used for indicating the data sending state of a sending communication port of the communication module, the first signal indication LED circuit, the second signal indication LED circuit and the third signal indication LED circuit have the same circuit structure, the anodes of the first light emitting diodes are connected with the data processing module, and the cathodes of the first light emitting diodes are grounded through a nineteenth resistor;

the fourth signal indication LED circuit is used for indicating the feedback signal condition of the feedback signal processing module, the fifth signal indication LED circuit is used for indicating the self-adaptive adjustment condition of the topology signal generation module, the fourth signal indication LED circuit and the fifth signal indication LED circuit are identical in circuit structure, the base level of the triode is connected through the twentieth resistor, the data processing module is grounded through the twenty-first resistor, the collector of the triode is connected with the cathode of the second light emitting diode, the anode of the second light emitting diode is connected with the power supply through the twenty-second resistor, and the emitter of the triode is grounded.