Substation line telemetering quantity acquisition equipment

Abstract

An acquisition device for remote measurement of a transformer station line belongs to the field of transformer station line data acquisition and comprises a power supply module, a measuring unit, an MCU microprocessor, a communication unit and a network module, the measuring unit measures voltage, current and frequency information of an accessed loop in real time, and the MCU microprocessor realizes operation, storage and forwarding of data; the PT voltage conversion unit is connected to a secondary loop of a PT voltage transformer of a high-voltage line of a transformer substation, converts a voltage signal into a standard voltage signal and uploads the standard voltage signal to the measuring unit through a PT loop voltage interface; the CT current conversion unit is connected to a transformer station high-voltage line CT current transformer secondary circuit, converts a current signal into a standard current signal, and uploads the standard current signal to the measuring unit through a CT circuit current interface. According to the utility model, voltage, current, active power, reactive power, frequency and other telemetering information can be measured, collected, sorted and sent in real time, and a data basis is provided for dispatching management of a transformer substation.

Description

Technical Field

[0001] The utility model belongs to the technical field of substation line data acquisition, and particularly relates to a device for collecting remote measurement data of substation lines. Background Technique

[0002] At present, the acquisition method of real-time operation parameters (i.e., remote measurement data) such as voltage, current, active power, reactive power, and frequency of high-voltage lines in substations is mainly the independent transmitter mode. That is, the secondary (low-voltage) circuits of PT voltage transformers and CT current transformers on high-voltage lines in substations are connected to transmitters. The transmitters include U voltage transmitters, A current transmitters, PW active power transmitters, QWA reactive power transmitters, and VF frequency transmitters, and the transmitters output a DC current value of 4 - 20 mA. The traditional acquisition method is to place each transmitter independently, which is relatively large in size, occupies a large space, has cumbersome and redundant wiring, and has disadvantages such as high failure rate, low output accuracy, and large maintenance workload, which is not conducive to integrated automation dispatching management.

[0003] When dispatching personnel remotely manage the integrated automation system of substations, they must accurately monitor the real-time parameters of the operation of high-voltage lines in substations. Therefore, in order to improve the online rate of equipment, increase measurement accuracy, and reduce maintenance costs, the acquisition device of the present utility model is developed. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a device for collecting remote measurement data of substation lines, and particularly relates to a device for collecting real-time operation parameters such as voltage, current, active power, reactive power, and frequency of high-voltage lines in substations.

[0005] The technical solution adopted by the present utility model to solve the technical problems is as follows:

[0006] A device for collecting remote measurement data of substation lines provided by the present utility model mainly includes:

[0007] AC measurement board

[0008] A power supply module, a measurement unit, an MCU microprocessor, a communication unit, and a network module installed on the AC measurement board. The measurement unit, MCU microprocessor, communication unit, and network module are all connected to the power supply module. The measurement unit, communication unit, and network module are all connected to the MCU microprocessor. The communication unit is connected to the network module. The measurement unit is used to measure the loop voltage, current, and frequency information in real time. The MCU microprocessor is used to perform data operation, storage, and forwarding, and upload the operation results to the communication gateway through the communication unit and network module.

[0009] PT measurement board

[0010] A PT voltage conversion unit and a PT loop voltage interface installed on a PT measurement board. The PT voltage conversion unit is connected to the secondary circuit of a PT voltage transformer of a substation high-voltage line. The PT loop voltage interface is respectively connected to the PT voltage conversion unit and the measurement unit. The PT voltage conversion unit is used to convert the voltage signal of the secondary circuit of the PT voltage transformer of the substation high-voltage line into a standard voltage signal, and the standard voltage signal is uploaded to the measurement unit through the PT loop voltage interface;

[0011] CT measurement board;

[0012] A CT current conversion unit and a CT loop current interface installed on a CT measurement board. The CT current conversion unit is connected to the secondary circuit of a CT current transformer of a substation high-voltage line. The CT loop current interface is respectively connected to the CT current conversion unit and the measurement unit. The CT current conversion unit is used to convert the current signal of the secondary circuit of the CT current transformer of the substation high-voltage line into a standard current signal, and the standard current signal is uploaded to the measurement unit through the CT loop current interface.

[0013] Further, the specific circuit of the measurement unit includes: an AD acquisition chip, a fourth capacitor, a seventh capacitor, an eighth capacitor, a tenth capacitor, and a second resistor; one end of the fourth capacitor, one end of the second resistor, and the twenty-seventh pin of the AD acquisition chip are connected; both ends of the seventh capacitor are respectively connected to the first pin and the twenty-eighth pin of the AD acquisition chip, both ends of the eighth capacitor are respectively connected to the twenty-sixth pin and the fifteenth pin of the AD acquisition chip, and both ends of the tenth capacitor are respectively connected to the twenty-fifth pin and the fifteenth pin of the AD acquisition chip.

[0014] Further, the specific circuit of the PT voltage conversion unit and the PT loop voltage interface includes: a first PT sensor, a second PT sensor, a third PT sensor, an eighth chip, a tenth chip, an eleventh chip, a twelfth chip, a fourteenth capacitor, a seventeenth capacitor, a twenty-eighth capacitor, a thirty-eighth capacitor, a thirty-ninth capacitor, a fortieth capacitor, a second capacitor, a twenty-ninth capacitor, a sixteenth resistor, a nineteenth resistor, a twenty-second resistor, a twenty-fourth resistor, a twenty-fifth resistor, resistors from fifty-fifth to sixtieth, resistors from thirtieth to thirty-second, a twenty-first terminal, a twenty-second terminal, a seventh terminal, an eleventh terminal, a sixteenth terminal, an eighth diode, a ninth diode, a twelfth diode, a thirteenth diode, a sixteenth diode, and a seventeenth diode;

[0015] The seventh pin of the eighth chip is connected to the nineteenth pin of the AD acquisition chip. Both ends of the fourteenth capacitor are respectively connected to the eighth pin and the tenth pin of the eighth chip. The first pin of the eighth chip, one end of the thirty-eighth capacitor, one end of the sixteenth resistor, and the first pin of the tenth chip are connected. The other end of the thirty-eighth capacitor, the other end of the sixteenth resistor, the second pin of the tenth chip, one end of the eighth diode, one end of the ninth diode, and one end of the fifty-eighth resistor are connected. The other end of the eighth diode, the other end of the ninth diode, the third pin of the tenth chip, one end of the fifty-seventh resistor, and the fourth pin of the first PT sensor are connected. The third pin of the first PT sensor is connected to the other end of the fifty-eighth resistor. The first pin of the first PT sensor is connected to one end of the thirtieth resistor. The other end of the thirtieth resistor is connected to the first pin of the twenty-first terminal block;

[0016] The seventh pin of the eleventh chip is connected to the twentieth pin of the AD acquisition chip. Both ends of the seventeenth capacitor are respectively connected to the eighth pin and the tenth pin of the eleventh chip. The first pin of the eleventh chip, one end of the thirty-ninth capacitor, one end of the nineteenth resistor, and the fourteenth pin of the tenth chip are connected. The other end of the thirty-ninth capacitor, the other end of the nineteenth resistor, the thirteenth pin of the tenth chip, one end of the twelfth diode, one end of the thirteenth diode, and one end of the fifty-ninth resistor are connected. The other end of the twelfth diode, the other end of the thirteenth diode, the twelfth pin of the tenth chip, one end of the fifty-sixth resistor, and the fourth pin of the second PT sensor are connected. The third pin of the second PT sensor is connected to the other end of the fifty-ninth resistor. The first pin of the second PT sensor is connected to one end of the thirty-first resistor. The other end of the thirty-first resistor is connected to the first pin of the twenty-second terminal block;

[0017] The seventh pin of the twelfth chip is connected to the twenty-first pin of the AD acquisition chip. Both ends of the twenty-eighth capacitor are respectively connected to the eighth pin and the tenth pin of the twelfth chip. The first pin of the twelfth chip, one end of the fortieth capacitor, one end of the twenty-second resistor, and the eighth pin of the tenth chip are connected. The other end of the fortieth capacitor, the other end of the twenty-second resistor, the ninth pin of the tenth chip, one end of the sixteenth diode, one end of the seventeenth diode, and one end of the sixtieth resistor are connected. The other end of the sixteenth diode, the other end of the seventeenth diode, the tenth pin of the tenth chip, one end of the fifty-fifth resistor, and the fourth pin of the third PT sensor are connected. The third pin of the third PT sensor is connected to the other end of the sixtieth resistor. The first pin of the third PT sensor is connected to one end of the thirty-second resistor. The other end of the thirty-second resistor is connected to the second pin of the seventh terminal block;

[0018] One end of the second capacitor, one end of the fifty-fourth resistor, and the twenty-third pin of the AD acquisition chip are connected. The other end of the fifty-fourth resistor is connected to the seventh pin of the tenth chip. The fifth pin of the tenth chip, one end of the twenty-fourth resistor, and one end of the twenty-ninth capacitor are connected. The other end of the twenty-fourth resistor, one end of the twenty-fifth resistor, and the first pin of the sixteenth terminal are connected. The other end of the twenty-ninth capacitor, the other end of the twenty-fifth resistor, and the second pin of the sixteenth terminal are connected;

[0019] The voltage signal of the secondary circuit of the PT voltage transformer of the high-voltage line in the substation is converted into a standard voltage signal through the first PT sensor, the second PT sensor, the third PT sensor, the tenth chip, the eighth chip, the eleventh chip, and the twelfth chip and output to the AD acquisition chip.

[0020] Further, the specific circuit of the CT current conversion unit and the CT loop current interface includes: the first CT sensor, the second CT sensor, the third CT sensor, the fourth CT sensor, the sixth CT sensor, the seventh CT sensor, the first chip, the fifth chip, the sixth chip, the second chip, the first capacitor, the second capacitor, the fifth capacitor, the ninth capacitor, the eleventh capacitor, the thirty-fifth capacitor, the thirty-sixth capacitor, the thirty-seventh capacitor, the first resistor, the third resistor, the seventh resistor, the eighth resistor, the twelfth resistor, the first diode, the second diode, the third diode, the fourth diode, the fifth diode, the seventh diode, the first terminal, the second terminal, the third terminal, and the fourth terminal;

[0021] The seventh pin of the first chip is connected to the sixteenth pin of the AD acquisition chip. Both ends of the second capacitor are respectively connected to the eighth pin and the tenth pin of the first chip. The first pin of the first chip, one end of the thirty-fifth capacitor, one end of the first resistor, and the seventh pin of the second chip are connected. The other end of the thirty-fifth capacitor, the other end of the first resistor, the sixth pin of the second chip, one end of the first diode, and one end of the second diode are connected to the second pin of the fourth CT sensor and the third pin of the first CT sensor. The other end of the first diode, the other end of the second diode, the fifth pin of the second chip, the first pin of the fourth CT sensor, and the fourth pin of the first CT sensor are connected. The first CT sensor is connected to the first terminal;

[0022] The seventh pin of the fifth chip is connected to the seventeenth pin of the AD acquisition chip. Both ends of the fifth capacitor are respectively connected to the eighth pin and the tenth pin of the fifth chip. The first pin of the fifth chip, one end of the thirty-sixth capacitor, one end of the third resistor, and the eighth pin of the second chip are connected. The other end of the thirty-sixth capacitor, the other end of the third resistor, the ninth pin of the second chip, one end of the third diode, one end of the fourth diode, the second pin of the sixth CT sensor, and the third pin of the second CT sensor are connected. The other end of the third diode, the other end of the fourth diode, the tenth pin of the second chip, the first pin of the sixth CT sensor, and the fourth pin of the second CT sensor are connected. The second CT sensor is connected to the second terminal;

[0023] The seventh pin of the sixth chip is connected to the eighteenth pin of the AD acquisition chip. Both ends of the ninth capacitor are respectively connected to the eighth pin and the tenth pin of the sixth chip. The first pin of the sixth chip, one end of the thirty-seventh capacitor, one end of the seventh resistor, and the fourteenth pin of the second chip are connected. The other end of the thirty-seventh capacitor, the other end of the seventh resistor, the thirteenth pin of the second chip, one end of the fifth diode, one end of the seventh diode, the second pin of the seventh CT sensor, and the third pin of the third CT sensor are connected. The other end of the fifth diode, the other end of the seventh diode, the twelfth pin of the second chip, the first pin of the seventh CT sensor, and the fourth pin of the third CT sensor are connected. The third CT sensor is connected to the third terminal;

[0024] One end of the first capacitor, one end of the fifty-second resistor, and the twenty-second pin of the AD acquisition chip are connected. The other end of the fifty-second resistor is connected to the first pin of the second chip. The third pin of the second chip, one end of the eighth resistor, and one end of the eleventh capacitor are connected. The other end of the eighth resistor, one end of the twelfth resistor, and the first pin of the fourth terminal are connected. The other end of the eleventh capacitor, the other end of the twelfth resistor, and the second pin of the fourth terminal are connected;

[0025] The current signals of the secondary circuits of the CT current transformers of the high-voltage lines in the substation pass through the first CT sensor, the second CT sensor, the third CT sensor, the fourth CT sensor, the sixth CT sensor, the seventh CT sensor, the first chip, the fifth chip, the sixth chip, and the second chip and are converted into standard current signals and output to the AD acquisition chip.

[0026] The beneficial effects of the present utility model are:

[0027] A data acquisition device for remote measurement of substation lines provided by the present utility model is a data acquisition device for the secondary side of the high-voltage line transformers in the substation, which can collect the operation data of the lines in the substation in real time and send them to the communication network shutdown device through the local network.

[0028] A collection device for remote measurement of substation line parameters can realize real-time measurement, collection, collation and transmission of remote measurement information such as voltage, current, active power, reactive power, frequency, etc., enabling management personnel to monitor the operation data of lines in the substation in real time, obtain the operation status of the substation dispatching management system in real time, and provide data basis for the dispatching management of the substation.

[0029] A collection device for remote measurement of substation line parameters of the present utility model improves the on-line rate of the device, increases the measurement accuracy and reduces the maintenance cost. Brief Description of the Drawings

[0030] Figure 1 It is a block diagram of the structural composition of a collection device for remote measurement of substation line parameters of the present utility model.

[0031] Figure 2 It is the specific circuit diagram of the measurement unit, PT voltage conversion unit, PT circuit voltage interface, CT current conversion unit, and CT circuit current interface.

[0032] In the figure, 1. AC measurement board, 2. PT measurement board, 3. CT measurement board, 4. power supply module, 5. measurement unit, 6. MCU microprocessor, 7. communication unit, 8. network module, 9. PT voltage conversion unit, 10. PT circuit voltage interface, 11. CT current conversion unit, 12. CT circuit current interface, 13. first PT wire harness, 14. first CT wire harness, 15. second PT wire harness, 16. second CT wire harness. Detailed Embodiment

[0033] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings.

[0034] A collection device for remote measurement of substation line parameters provided by the present utility model is a data collection device for the secondary side of high-voltage line transformers in a substation, which can collect the operation data of lines in the substation in real time and send it to the communication network gateway through the local network.

[0035] Refer to Figure 1 For illustration, a collection device for remote measurement of substation line parameters provided by the present utility model mainly includes the following components:

[0036] AC measurement board 1, PT measurement board 2, CT measurement board 3, power supply module 4, measurement unit 5, MCU microprocessor 6, communication unit 7, network module 8, PT voltage conversion unit 9, PT circuit voltage interface 10, CT current conversion unit 11, CT circuit current interface 12, first PT wire harness 13, first CT wire harness 14, second PT wire harness 15 and second CT wire harness 16.

[0037] The AC measurement board 1 is mainly responsible for measuring the accessed voltage, current, active power, reactive power, and frequency information.

[0038] Specifically, the power supply module 4, the measurement unit 5, the MCU microprocessor 6, the communication unit 7, the network module 8, the first PT harness 13, and the first CT harness 14 are all installed on the AC measurement board 1. The measurement unit 5, the MCU microprocessor 6, the communication unit 7, and the network module 8 are all connected to the power supply module 4. The power supply module 4 provides the DC power required for the operation of the measurement unit 5, the MCU microprocessor 6, the communication unit 7, and the network module 8. The measurement unit 5, the communication unit 7, and the network module 8 are all connected to the MCU microprocessor 6, and the communication unit 7 and the network module 8 are connected. The measurement unit 5 is mainly responsible for measuring the loop voltage, current, and frequency information of the accessed circuit in real time, and converting the measured voltage, current, and frequency information into digital signals and then transmitting them to the MCU microprocessor 6. The MCU microprocessor 6 is mainly used to perform data operation, storage, and forwarding. Specifically, the MCU microprocessor 6 calculates the active power and reactive power using the loop voltage, current, and frequency information measured by the measurement unit 5, and uploads the calculation results to the communication network shutdown through the communication unit 7 and the network module 8. The connection between the communication unit 7 and the network module 8 can provide network connection communication. Among them, the specific function of the network module 8 is to establish a physical network connection with the remote communication network shutdown, and the specific function of the communication unit 7 is to transmit the telecontrol digital signal in the manner of a proprietary network protocol.

[0039] The PT measurement board 2 is mainly responsible for accessing the secondary circuit of the PT voltage transformer of the high-voltage line in the substation, performing voltage range conversion, and providing the conversion result to the AC measurement board 1.

[0040] Specifically, the PT voltage conversion unit 9, the PT loop voltage interface 10, and the second PT harness 15 are all installed on the PT measurement board 2. The PT voltage conversion unit 9 accesses the secondary circuit of the PT voltage transformer of the high-voltage line in the substation. The PT loop voltage interface 10 is connected to the PT voltage conversion unit 9. The PT loop voltage interface 10 is connected to the measurement unit 5 on the AC measurement board 1 through the second PT harness 15 and the first PT harness 13. The PT voltage conversion unit 9 is mainly responsible for converting the voltage signal of the secondary circuit of the PT voltage transformer of the high-voltage line in the substation into a standard voltage signal (0 - 5V value). The standard voltage signal is uploaded to the measurement unit 5 through the PT loop voltage interface 10, the second PT harness 15, and the first PT harness 13, and after being converted into a digital signal by the measurement unit 5, it is transmitted to the MCU microprocessor 6 for further processing.

[0041] The CT measurement board 3 is mainly responsible for accessing the secondary circuit of the CT current transformer of the high-voltage line in the substation, performing current range conversion and providing the conversion result to the AC measurement board 1.

[0042] Specifically, the CT current conversion unit 11, the CT loop current interface 12, and the second CT wire harness 16 are all installed on the CT measurement board 3. The CT current conversion unit 11 accesses the secondary circuit of the CT current transformer of the high-voltage line in the substation. The CT loop current interface 12 is connected to the CT current conversion unit 11. The CT loop current interface 12 is connected to the measurement unit 5 on the AC measurement board 1 through the second CT wire harness 16 and the first CT wire harness 14. The CT current conversion unit 11 is mainly responsible for converting the current signal in the secondary circuit of the CT current transformer of the high-voltage line in the substation into a standard current signal (0 - 5V value). The standard current signal is uploaded to the measurement unit 5 through the CT loop current interface 12, the second CT wire harness 16, and the first CT wire harness 14. After being converted into a digital signal by the measurement unit 5, it is transmitted to the MCU microprocessor 6 for further processing.

[0043] A substation line remote measurement acquisition device of the present utility model can realize the real-time measurement, acquisition, sorting, and transmission of operation parameters such as voltage, current, active power, reactive power, and frequency, enabling management personnel to monitor the operation data of the lines in the substation in real time, obtain the operation status of the substation dispatching management system in real time, and provide a data basis for the dispatching management of the substation.

[0044] A substation line remote measurement acquisition device of the present utility model collects the actual operation parameters of each high-voltage line in the substation in real time and uses the field network to communicate with the communication network shutdown to upload data. After the communication network shutdown sorts out the information, it is sent to the remote dispatching monitoring center, and operation and maintenance, repair and other personnel perform relevant dispatching management by viewing the information.

[0045] In order to further elaborate on a substation line remote measurement acquisition device of the present utility model in detail, the specific circuit composition of each module will be introduced in detail below.

[0046] Preferably, the measurement unit 5 can specifically adopt the AD acquisition chip U4, and its specific circuit is as Figure 2As shown, it mainly includes: AD acquisition chip U4, fourth capacitor C4, seventh capacitor C7, eighth capacitor C8, tenth capacitor C10 and second resistor R2. Among them, one end of the fourth capacitor C4, one end of the second resistor R2 and the 27th pin 27 of the AD acquisition chip U4 are connected; both ends of the seventh capacitor C7 are respectively connected to the 1st pin 1 and the 28th pin 28 of the AD acquisition chip U4, both ends of the eighth capacitor C8 are respectively connected to the 26th pin 26 and the 15th pin 15 of the AD acquisition chip U4, and both ends of the tenth capacitor C10 are respectively connected to the 25th pin 25 and the 15th pin 15 of the AD acquisition chip U4.

[0047] Preferably, the specific circuit of the PT voltage conversion unit 9 and the PT loop voltage interface 10 is as Figure 2 As shown, it mainly includes: first PT sensor P1, second PT sensor P2, third PT sensor P3, eighth chip U8, tenth chip U10, eleventh chip U11, twelfth chip U12, fourteenth capacitor C14, seventeenth capacitor C17, twenty-eighth capacitor C28, thirty-eighth capacitor C38, thirty-ninth capacitor C39, fortieth capacitor C40, second capacitor C2, twenty-ninth capacitor C29, sixteenth resistor R16, nineteenth resistor R19, twenty-second resistor R22, twenty-fourth resistor R24, twenty-fifth resistor R25, fifty-fifth resistor R55, fifty-sixth resistor R56, fifty-seventh resistor R57, fifty-eighth resistor R58, fifty-ninth resistor R59, sixtieth resistor R60, thirtieth resistor R30, thirty-first resistor R31, thirty-second resistor R32, twenty-first terminal block X21, twenty-second terminal block X22, seventh terminal block X7, eleventh terminal block X11, sixteenth terminal block X16, eighth diode V8, ninth diode V9, twelfth diode V12, thirteenth diode V13, sixteenth diode V16 and seventeenth diode V17.

[0048] The seventh pin 7 of the eighth chip U8 is connected to the nineteenth pin 19 of the AD acquisition chip U4. Both ends of the fourteenth capacitor C14 are respectively connected to the eighth pin 8 and the tenth pin 10 of the eighth chip U8. The first pin 1 of the eighth chip U8, one end of the thirty-eighth capacitor C38, one end of the sixteenth resistor R16, and the first pin 1 of the tenth chip U10 are connected. The other end of the thirty-eighth capacitor C38, the other end of the sixteenth resistor R16, the second pin 2 of the tenth chip U10, one end of the eighth diode V8, one end of the ninth diode V9, and one end of the fifty-eighth resistor R58 are connected. The other end of the eighth diode V8, the other end of the ninth diode V9, the third pin 3 of the tenth chip U10, one end of the fifty-seventh resistor R57, and the fourth pin 4 of the first PT sensor P1 are connected. The third pin 3 of the first PT sensor P1 is connected to the other end of the fifty-eighth resistor R58. The first pin 1 of the first PT sensor P1 is connected to one end of the thirtieth resistor R30. The other end of the thirtieth resistor R30 is connected to the first pin 1 of the twenty-first terminal block X21.

[0049] The seventh pin 7 of the eleventh chip U11 is connected to the twentieth pin 20 of the AD acquisition chip U4. Both ends of the seventeenth capacitor C17 are respectively connected to the eighth pin 8 and the tenth pin 10 of the eleventh chip U11. The first pin 1 of the eleventh chip U11, one end of the thirty-ninth capacitor C39, one end of the nineteenth resistor R19, and the fourteenth pin 14 of the tenth chip U10 are connected. The other end of the thirty-ninth capacitor C39, the other end of the nineteenth resistor R19, the thirteenth pin 13 of the tenth chip U10, one end of the twelfth diode V12, one end of the thirteenth diode V13, and one end of the fifty-ninth resistor R59 are connected. The other end of the twelfth diode V12, the other end of the thirteenth diode V13, the twelfth pin 12 of the tenth chip U10, one end of the fifty-sixth resistor R56, and the fourth pin 4 of the second PT sensor P2 are connected. The third pin 3 of the second PT sensor P2 is connected to the other end of the fifty-ninth resistor R59. The first pin 1 of the second PT sensor P2 is connected to one end of the thirty-first resistor R31. The other end of the thirty-first resistor R31 is connected to the first pin 1 of the twenty-second terminal block X22.

[0050] The seventh pin 7 of the twelfth chip U12 is connected to the twenty-first pin 21 of the AD acquisition chip U4. Both ends of the twenty-eighth capacitor C28 are respectively connected to the eighth pin 8 and the tenth pin 10 of the twelfth chip U12. The first pin 1 of the twelfth chip U12, one end of the fortieth capacitor C40, one end of the twenty-second resistor R22, and the eighth pin 8 of the tenth chip U10 are connected. The other end of the fortieth capacitor C40, the other end of the twenty-second resistor R22, the ninth pin 9 of the tenth chip U10, one end of the sixteenth diode V16, one end of the seventeenth diode V17, and one end of the sixtieth resistor R60 are connected. The other end of the sixteenth diode V16, the other end of the seventeenth diode V17, the tenth pin 10 of the tenth chip U10, one end of the fifty-fifth resistor R55, and the fourth pin 4 of the third PT sensor P3 are connected. The third pin 3 of the third PT sensor P3 is connected to the other end of the sixtieth resistor R60. The first pin 1 of the third PT sensor P3 is connected to one end of the thirty-second resistor R32. The other end of the thirty-second resistor R32 is connected to the second pin 2 of the seventh terminal block X7.

[0051] One end of the second capacitor C2, one end of the fifty-fourth resistor R54, and the twenty-third pin 23 of the AD acquisition chip U4 are connected. The other end of the fifty-fourth resistor R54 is connected to the seventh pin 7 of the tenth chip U10. The fifth pin 5 of the tenth chip U10, one end of the twenty-fourth resistor R24, and one end of the twenty-ninth capacitor C29 are connected. The other end of the twenty-fourth resistor R24, one end of the twenty-fifth resistor R25, and the first pin 1 of the sixteenth terminal block X16 are connected. The other end of the twenty-ninth capacitor C29, the other end of the twenty-fifth resistor R25, and the second pin 2 of the sixteenth terminal block X16 are connected.

[0052] The voltage signal of the secondary circuit of the PT voltage transformer of the high-voltage line in the substation is converted into a standard voltage signal (0 - 5V value) through the first PT sensor P1, the second PT sensor P2, the third PT sensor P3, the tenth chip U10, the eighth chip U8, the eleventh chip U11, and the twelfth chip U12 and output to the AD acquisition chip U4.

[0053] Preferably, the specific circuits of the CT current conversion unit 11 and the CT loop current interface 12 are as Figure 2As shown, it mainly includes: the first CT sensor CT1, the second CT sensor CT2, the third CT sensor CT3, the fourth CT sensor CT4, the sixth CT sensor CT6, the seventh CT sensor CT7, the first chip U1, the fifth chip U5, the sixth chip U6, the second chip U2, the first capacitor C1, the second capacitor C2, the fifth capacitor C5, the ninth capacitor C9, the eleventh capacitor C11, the thirty-fifth capacitor C35, the thirty-sixth capacitor C36, the thirty-seventh capacitor C37, the first resistor R1, the third resistor R3, the seventh resistor R7, the eighth resistor R8, the twelfth resistor R12, the first diode V1, the second diode V2, the third diode V3, the fourth diode V4, the fifth diode V5, the seventh diode V7, the first terminal X1, the second terminal X2, the third terminal X3, and the fourth terminal V4.

[0054] The seventh pin 7 of the first chip U1 is connected to the sixteenth pin 16 of the AD acquisition chip U4. Both ends of the second capacitor C2 are respectively connected to the eighth pin 8 and the tenth pin 10 of the first chip U1. The first pin 1 of the first chip U1, one end of the thirty-fifth capacitor C35, one end of the first resistor R1, and the seventh pin 7 of the second chip U2 are connected. The other end of the thirty-fifth capacitor C35, the other end of the first resistor R1, the sixth pin 6 of the second chip U2, one end of the first diode V1, one end of the second diode V2, the second pin 2 of the fourth CT sensor CT4, and the third pin 3 of the first CT sensor CT1 are connected. The other end of the first diode V1, the other end of the second diode V2, the fifth pin 5 of the second chip U2, the first pin 1 of the fourth CT sensor CT4, and the fourth pin 4 of the first CT sensor CT1 are connected. The first CT sensor CT1 is connected to the first terminal X1.

[0055] The seventh pin 7 of the fifth chip U5 is connected to the seventeenth pin 17 of the AD acquisition chip U4. Both ends of the fifth capacitor C5 are respectively connected to the eighth pin 8 and the tenth pin 10 of the fifth chip U5. The first pin 1 of the fifth chip U5, one end of the thirty-sixth capacitor C36, one end of the third resistor R3, and the eighth pin 8 of the second chip U2 are connected. The other end of the thirty-sixth capacitor C36, the other end of the third resistor R3, the ninth pin 9 of the second chip U2, one end of the third diode V3, one end of the fourth diode V4, the second pin 2 of the sixth CT sensor CT6, and the third pin 3 of the second CT sensor CT2 are connected. The other end of the third diode V3, the other end of the fourth diode V4, the tenth pin 10 of the second chip U2, the first pin 1 of the sixth CT sensor CT6, and the fourth pin 4 of the second CT sensor CT2 are connected. The second CT sensor CT2 is connected to the second terminal X2.

[0056] The seventh pin 7 of the sixth chip U6 is connected to the eighteenth pin 18 of the AD acquisition chip U4. Both ends of the ninth capacitor C9 are respectively connected to the eighth pin 8 and the tenth pin 10 of the sixth chip U6. The first pin 1 of the sixth chip U6, one end of the thirty-seventh capacitor C37, one end of the seventh resistor R7, and the fourteenth pin 14 of the second chip U2 are connected. The other end of the thirty-seventh capacitor C37, the other end of the seventh resistor R7, the thirteenth pin 13 of the second chip U2, one end of the fifth diode V5, one end of the seventh diode V7, the second pin 2 of the seventh CT sensor CT7, and the third pin 3 of the third CT sensor CT3 are connected. The other end of the fifth diode V5, the other end of the seventh diode V7, the twelfth pin 12 of the second chip U2, the first pin 1 of the seventh CT sensor CT7, and the fourth pin 4 of the third CT sensor CT3 are connected. The third CT sensor CT3 is connected to the third terminal block X3.

[0057] One end of the first capacitor C1, one end of the fifty-second resistor R52, and the twenty-second pin 22 of the AD acquisition chip U4 are connected. The other end of the fifty-second resistor R52 is connected to the first pin 1 of the second chip U2. The third pin 3 of the second chip U2, one end of the eighth resistor R8, and one end of the eleventh capacitor C11 are connected. The other end of the eighth resistor R8, one end of the twelfth resistor R12, and the first pin 1 of the fourth terminal block X4 are connected. The other end of the eleventh capacitor C11, the other end of the twelfth resistor R12, and the second pin 2 of the fourth terminal block X4 are connected.

[0058] The current signals of the secondary circuit of the CT current transformer of the high-voltage line of the substation are converted into standard current signals (0 - 5V value) by the first CT sensor CT1, the second CT sensor CT2, the third CT sensor CT3, the fourth CT sensor CT4, the sixth CT sensor CT6, the seventh CT sensor CT7, the first chip U1, the fifth chip U5, the sixth chip U6, and the second chip U2 and output to the AD acquisition chip U4.

[0059] An acquisition device for remote measurement of substation line provided by the present utility model has the following specific working principle:

[0060] The voltage signals of the secondary circuit of the PT voltage transformer of the high-voltage line in the substation are converted into standard voltage signals (0-5V value) through the first PT sensor P1, the second PT sensor P2, the third PT sensor P3, the tenth chip U10, the eighth chip U8, the eleventh chip U11, and the twelfth chip U12 and output to the AD acquisition chip U4; at the same time, the current signals of the secondary circuit of the CT current transformer of the high-voltage line in the substation are converted into standard current signals (0-5V value) through the first CT sensor CT1, the second CT sensor CT2, the third CT sensor CT3, the fourth CT sensor CT4, the sixth CT sensor CT6, the seventh CT sensor CT7, the first chip U1, the fifth chip U5, the sixth chip U6, and the second chip U2 and output to the AD acquisition chip U4; the standard voltage signals and the standard current signals are converted into digital signals after the action of the AD acquisition chip U4, and the MCU microprocessor 6 performs FFT operations on the digital signals, calculates grid data such as voltage, current, active power, reactive power, frequency, and power grid cycle, and uploads the calculation results to the communication network shutdown through the communication unit 7 and the network module 8.

[0061] A collection device for remote measurement of substation lines of the present utility model enables managers to monitor the operation data of lines in the substation in real time, obtain the operation status of the substation dispatching management system in real time, and provide data basis for the dispatching management of the substation.

[0062] The above is only the preferred implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An acquisition device for remote measurement of substation line, characterized in that, Including: AC measurement board; A power supply module, a measurement unit, an MCU microprocessor, a communication unit, and a network module installed on the AC measurement board. The measurement unit, MCU microprocessor, communication unit, and network module are all connected to the power supply module. The measurement unit, communication unit, and network module are all connected to the MCU microprocessor. The communication unit is connected to the network module. The measurement unit is used to measure the loop voltage, current, and frequency information of the access in real time. The MCU microprocessor is used to perform data operation, storage, and forwarding, and upload the operation results to the communication network shutdown through the communication unit and the network module; PT measurement board; A PT voltage conversion unit and a PT loop voltage interface installed on the PT measurement board. The PT voltage conversion unit is connected to the secondary circuit of the PT voltage transformer of the substation high-voltage line. The PT loop voltage interface is respectively connected to the PT voltage conversion unit and the measurement unit. The PT voltage conversion unit is used to convert the voltage signal of the secondary circuit of the PT voltage transformer of the substation high-voltage line into a standard voltage signal, and the standard voltage signal is uploaded to the measurement unit through the PT loop voltage interface; CT measurement board; A CT current conversion unit and a CT loop current interface installed on the CT measurement board. The CT current conversion unit is connected to the secondary circuit of the CT current transformer of the substation high-voltage line. The CT loop current interface is respectively connected to the CT current conversion unit and the measurement unit. The CT current conversion unit is used to convert the current signal of the secondary circuit of the CT current transformer of the substation high-voltage line into a standard current signal, and the standard current signal is uploaded to the measurement unit through the CT loop current interface.

2. The acquisition device for remote measurement of substation line according to claim 1, characterized in that, The specific circuit of the measurement unit includes: an AD acquisition chip, a fourth capacitor, a seventh capacitor, an eighth capacitor, a tenth capacitor, and a second resistor. One end of the fourth capacitor, one end of the second resistor, and the twenty-seventh pin of the AD acquisition chip are connected. The two ends of the seventh capacitor are respectively connected to the first pin and the twenty-eighth pin of the AD acquisition chip. The two ends of the eighth capacitor are respectively connected to the twenty-sixth pin and the fifteenth pin of the AD acquisition chip. The two ends of the tenth capacitor are respectively connected to the twenty-fifth pin and the fifteenth pin of the AD acquisition chip.

3. The acquisition device for remote measurement of substation line according to claim 2, characterized in that, The specific circuit of the PT voltage conversion unit and the PT loop voltage interface includes: a first PT sensor, a second PT sensor, a third PT sensor, an eighth chip, a tenth chip, an eleventh chip, a twelfth chip, a fourteenth capacitor, a seventeenth capacitor, a twenty-eighth capacitor, a thirty-eighth capacitor, a thirty-ninth capacitor, a fortieth capacitor, a second capacitor, a twenty-ninth capacitor, a sixteenth resistor, a nineteenth resistor, a twenty-second resistor, a twenty-fourth resistor, a twenty-fifth resistor, resistors from fifty-fifth to sixtieth, resistors from thirtieth to thirty-second, a twenty-first terminal, a twenty-second terminal, a seventh terminal, an eleventh terminal, a sixteenth terminal, an eighth diode, a ninth diode, a twelfth diode, a thirteenth diode, a sixteenth diode, and a seventeenth diode; The seventh pin of the eighth chip is connected to the nineteenth pin of the AD acquisition chip. Both ends of the fourteenth capacitor are respectively connected to the eighth pin and the tenth pin of the eighth chip. The first pin of the eighth chip, one end of the thirty-eighth capacitor, one end of the sixteenth resistor, and the first pin of the tenth chip are connected. The other end of the thirty-eighth capacitor, the other end of the sixteenth resistor, the second pin of the tenth chip, one end of the eighth diode, one end of the ninth diode, and one end of the fifty-eighth resistor are connected. The other end of the eighth diode, the other end of the ninth diode, the third pin of the tenth chip, one end of the fifty-seventh resistor, and the fourth pin of the first PT sensor are connected. The third pin of the first PT sensor is connected to the other end of the fifty-eighth resistor. The first pin of the first PT sensor is connected to one end of the thirtieth resistor. The other end of the thirtieth resistor is connected to the first pin of the twenty-first terminal block; The seventh pin of the eleventh chip is connected to the twentieth pin of the AD acquisition chip. Both ends of the seventeenth capacitor are respectively connected to the eighth pin and the tenth pin of the eleventh chip. The first pin of the eleventh chip, one end of the thirty-ninth capacitor, one end of the nineteenth resistor, and the fourteenth pin of the tenth chip are connected. The other end of the thirty-ninth capacitor, the other end of the nineteenth resistor, the thirteenth pin of the tenth chip, one end of the twelfth diode, one end of the thirteenth diode, and one end of the fifty-ninth resistor are connected. The other end of the twelfth diode, the other end of the thirteenth diode, the twelfth pin of the tenth chip, one end of the fifty-sixth resistor, and the fourth pin of the second PT sensor are connected. The third pin of the second PT sensor is connected to the other end of the fifty-ninth resistor. The first pin of the second PT sensor is connected to one end of the thirty-first resistor. The other end of the thirty-first resistor is connected to the first pin of the twenty-second terminal block; The seventh pin of the twelfth chip is connected to the twenty-first pin of the AD acquisition chip. Both ends of the twenty-eighth capacitor are respectively connected to the eighth pin and the tenth pin of the twelfth chip. The first pin of the twelfth chip, one end of the fortieth capacitor, one end of the twenty-second resistor, and the eighth pin of the tenth chip are connected. The other end of the fortieth capacitor, the other end of the twenty-second resistor, the ninth pin of the tenth chip, one end of the sixteenth diode, one end of the seventeenth diode, and one end of the sixtieth resistor are connected. The other end of the sixteenth diode, the other end of the seventeenth diode, the tenth pin of the tenth chip, one end of the fifty-fifth resistor, and the fourth pin of the third PT sensor are connected. The third pin of the third PT sensor is connected to the other end of the sixtieth resistor. The first pin of the third PT sensor is connected to one end of the thirty-second resistor. The other end of the thirty-second resistor is connected to the second pin of the seventh terminal block; One end of the second capacitor, one end of the fifty-fourth resistor, and the twenty-third pin of the AD acquisition chip are connected. The other end of the fifty-fourth resistor is connected to the seventh pin of the tenth chip. The fifth pin of the tenth chip, one end of the twenty-fourth resistor, and one end of the twenty-ninth capacitor are connected. The other end of the twenty-fourth resistor, one end of the twenty-fifth resistor, and the first pin of the sixteenth terminal block are connected. The other end of the twenty-ninth capacitor, the other end of the twenty-fifth resistor, and the second pin of the sixteenth terminal block are connected; The voltage signal of the secondary circuit of the PT voltage transformer of the high-voltage line in the substation is converted into a standard voltage signal by the first PT sensor, the second PT sensor, the third PT sensor, the tenth chip, the eighth chip, the eleventh chip, and the twelfth chip and output to the AD acquisition chip.

4. The acquisition device for remote measurement of substation line according to claim 2, characterized in that, The specific circuit of the CT current conversion unit and the CT loop current interface includes: the first CT sensor, the second CT sensor, the third CT sensor, the fourth CT sensor, the sixth CT sensor, the seventh CT sensor, the first chip, the fifth chip, the sixth chip, the second chip, the first capacitor, the second capacitor, the fifth capacitor, the ninth capacitor, the eleventh capacitor, the thirty-fifth capacitor, the thirty-sixth capacitor, the thirty-seventh capacitor, the first resistor, the third resistor, the seventh resistor, the eighth resistor, the twelfth resistor, the first diode, the second diode, the third diode, the fourth diode, the fifth diode, the seventh diode, the first terminal, the second terminal, the third terminal, and the fourth terminal; The seventh pin of the first chip is connected to the sixteenth pin of the AD acquisition chip. Both ends of the second capacitor are respectively connected to the eighth pin and the tenth pin of the first chip. The first pin of the first chip, one end of the thirty-fifth capacitor, one end of the first resistor, and the seventh pin of the second chip are connected. The other end of the thirty-fifth capacitor, the other end of the first resistor, the sixth pin of the second chip, one end of the first diode, and one end of the second diode are connected to the second pin of the fourth CT sensor and the third pin of the first CT sensor. The other end of the first diode, the other end of the second diode, the fifth pin of the second chip, the first pin of the fourth CT sensor, and the fourth pin of the first CT sensor are connected. The first CT sensor is connected to the first terminal; The seventh pin of the fifth chip is connected to the seventeenth pin of the AD acquisition chip. Both ends of the fifth capacitor are respectively connected to the eighth pin and the tenth pin of the fifth chip. The first pin of the fifth chip, one end of the thirty-sixth capacitor, one end of the third resistor, and the eighth pin of the second chip are connected. The other end of the thirty-sixth capacitor, the other end of the third resistor, the ninth pin of the second chip, one end of the third diode, and one end of the fourth diode are connected to the second pin of the sixth CT sensor and the third pin of the second CT sensor. The other end of the third diode, the other end of the fourth diode, the tenth pin of the second chip, the first pin of the sixth CT sensor, and the fourth pin of the second CT sensor are connected. The second CT sensor is connected to the second terminal; The seventh pin of the sixth chip is connected to the eighteenth pin of the AD acquisition chip. Both ends of the ninth capacitor are connected to the eighth pin and the tenth pin of the sixth chip respectively. The first pin of the sixth chip, one end of the thirty-seventh capacitor, one end of the seventh resistor, and the fourteenth pin of the second chip are connected. The other end of the thirty-seventh capacitor, the other end of the seventh resistor, the thirteenth pin of the second chip, one end of the fifth diode, one end of the seventh diode, the second pin of the seventh CT sensor, and the third pin of the third CT sensor are connected. The other end of the fifth diode, the other end of the seventh diode, the twelfth pin of the second chip, the first pin of the seventh CT sensor, and the fourth pin of the third CT sensor are connected. The third CT sensor is connected to the third terminal; One end of the first capacitor, one end of the fifty-second resistor, and the twenty-second pin of the AD acquisition chip are connected. The other end of the fifty-second resistor is connected to the first pin of the second chip. The third pin of the second chip, one end of the eighth resistor, and one end of the eleventh capacitor are connected. The other end of the eighth resistor, one end of the twelfth resistor, and the first pin of the fourth terminal are connected. The other end of the eleventh capacitor, the other end of the twelfth resistor, and the second pin of the fourth terminal are connected; The current signals of the secondary circuit of the CT current transformer of the high-voltage line in the substation are converted into standard current signals through the first CT sensor, the second CT sensor, the third CT sensor, the fourth CT sensor, the sixth CT sensor, the seventh CT sensor, the first chip, the fifth chip, the sixth chip, and the second chip and output to the AD acquisition chip.

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