A three-phase electric energy meter active and reactive parallel verification device

Abstract

The present invention relates to a three-phase electric energy meter active and reactive parallel calibration device. The main purpose is to solve the technical problem that the existing electric energy meter calibration device cannot calibrate the active and reactive power of the electric energy meter at the same time. The technical solution of the present invention is: the calibration device includes a three-phase standard power source, a three-phase standard electric energy meter, a plurality of error calculators, a time base source and a server, the three-phase standard power source and the three-phase standard electric energy meter are both connected to a 220V power supply, the three-phase voltage output end of the three-phase standard power source is connected in parallel with the three-phase voltage output end of the three-phase standard electric energy meter and then connected to a plurality of electric energy meters that need to be calibrated, the three-phase current output end of the three-phase standard power source and the three-phase current output end of the three-phase standard electric energy meter are connected to the three-phase current ends of the plurality of electric energy meters that need to be calibrated, and the active electric energy standard pulse and reactive electric energy standard pulse output ends of the three-phase standard electric energy meter are connected to the active electric energy standard pulse and reactive electric energy standard pulse input ends of a plurality of error calculators.

Description

Technical Field

[0001] The invention relates to a three-phase electric energy meter active and reactive parallel verification device, which belongs to the technical field of electric energy meter verification equipment. Background Art

[0002] The energy meter calibration device is a special standard metering equipment, usually including a test power supply, a standard energy meter, a wiring mechanism, etc. In the field of smart grid electrical measurement and energy metering technology, the calibration devices produced by different manufacturers are all carried out in the way of first calibrating the active power and then the reactive power. The existing energy meter calibration devices have the defect that they cannot calibrate the active and reactive power of the energy meter at the same time. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problem that the existing electric energy meter calibration device cannot calibrate the active and reactive power of the electric energy meter at the same time, and to provide a three-phase electric energy meter active and reactive parallel calibration device.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A three-phase electric energy meter reactive power parallel calibration device, comprising a three-phase standard power source, a three-phase standard electric energy meter, a plurality of error calculators, a time base source and a server, wherein the power input terminals of the three-phase standard power source and the three-phase standard electric energy meter are both connected to a 220V power supply, the three-phase voltage output terminal of the three-phase standard power source is connected in parallel with the three-phase voltage output terminal of the three-phase standard electric energy meter and then connected to the three-phase voltage terminals of a plurality of electric energy meters to be calibrated, the three-phase current output terminal of the three-phase standard power source and the three-phase current output terminal of the three-phase standard electric energy meter are connected to the three-phase current terminals of the plurality of electric energy meters to be calibrated, the active electric energy standard pulse and reactive electric energy standard pulse output terminals of the three-phase standard electric energy meter are connected to the active electric energy standard pulse and reactive electric energy standard pulse input terminals of a plurality of error calculators, the active pulse, reactive pulse and multi-function pulse output terminals of the plurality of error calculators are connected to the three-phase current terminals of the plurality of electric energy meters to be calibrated. The active pulse, reactive pulse and multi-function pulse terminals of several three-phase electric energy meters are connected, the power supply terminals of the time base source and the server are connected to a 220V power supply, the working power supply terminals of the time base source and the server are connected to a working power supply of 24V and a working power supply of 5V, the standard time base pulse output terminal of the time base source is connected to the standard time base pulse input terminals of several error calculators, the RS485 communication terminal of the server is connected to the RS485 communication terminal of the error calculator, the electric meter communication interface of the server is connected to the communication interface of several electric energy meters that need to be calibrated, the communication interface of several error calculators is connected to the communication interface of several electric energy meters that need to be calibrated, the working power supply terminals of several error calculators are connected to a working power supply of 24V and a working power supply of 5V, and the indicated voltages of the three-phase standard power source, the three-phase standard electric energy meter and the several electric energy meters that need to be calibrated are connected to a voltage indicator.

[0006] Furthermore, the three-phase standard electric energy meter is composed of a digital signal processor, a field programmable logic gate array, an active electric energy standard pulse output circuit and a reactive electric energy standard pulse output circuit. The output end of the digital signal processor is connected to the input end of the field programmable logic gate array through a data bus, and the output end of the field programmable logic gate array is connected to the input end of the active electric energy standard pulse circuit and the reactive electric energy standard pulse circuit.

[0007] Furthermore, the active electric energy standard pulse output circuit is composed of a first chip U1C, three resistors R4 to R6, two transistors Q1 and Q2, a first capacitor C1 and a first interface J1. Pin 5 of the first chip U1C is connected to pin PIN34 of the field programmable logic gate array, pin 6 of the first chip U1C is connected to one end of the fourth resistor R4, the base of the first transistor Q1, one end of the first capacitor C1 and the base of the second transistor Q2, the collector of the first transistor Q1 is connected to the VDD power supply, the emitter of the first transistor Q1 is connected to the other end of the fourth resistor R4, the other end of the first capacitor C1 and the collector of the second transistor Q2, and then to one end of the fifth and sixth resistors R5 and R6 connected in parallel, the other end of the fifth and sixth resistors R5 and R6 connected in parallel is connected to pin 1 of the first interface J1, the emitter of the second transistor Q2 and pin 3 of the first interface J1 are grounded, and pin 2 of the first interface J1 is connected to the VDD power supply.

[0008] Furthermore, the reactive energy standard pulse output circuit is composed of a second chip U1B, three resistors R11-R13, two transistors Q3 and Q4, a second capacitor C2 and a second interface J2, the 3rd pin of the second chip U1B is connected to the PIN35 pin of the field programmable logic gate array, the 4th pin of the second chip U1B is connected to one end of the eleventh resistor R11, the base of the third transistor Q3, one end of the second capacitor C2 and the base of the fourth transistor Q4, the collector of the third transistor Q3 is connected to the collector of the third transistor Q4. The emitter of the third triode Q3 is connected to the other end of the eleventh resistor R11, the other end of the second capacitor C2 and the collector of the fourth triode Q4, and then connected to one end of the twelfth and thirteenth resistors R12 and R13 connected in parallel, the other end of the twelfth and thirteenth resistors R12 and R13 connected in parallel is connected to pin 1 of the second interface J2, the emitter of the fourth triode Q2 and pin 3 of the second interface J2 are grounded, and pin 2 of the second interface J1 is connected to the VDD power supply.

[0009] Furthermore, the error calculator is composed of a standard active energy pulse input circuit, a standard reactive energy pulse input circuit, a standard clock pulse input circuit, an energy meter active energy pulse output circuit, an energy meter reactive energy pulse output circuit, an energy meter multifunctional pulse output circuit and a calculation chip. The energy meter active energy pulse output circuit and the energy meter reactive energy pulse output circuit are composed of a sixth chip U2D and a seventh chip U2E, seven resistors R1 to R3 and R7 to R10, two diodes D1 and D2, a light-emitting diode LED1, and two transient suppression diodes TVS1 and TVS2. Pin 9 of the sixth chip U2D is connected to one end of the third resistor R3 and the positive electrode of the first diode D1. The 8th pin of the sixth chip U2D is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the first resistor R1 and the 1st pin of the first transient suppression diode TVS1 to form an active energy pulse output end of the electric energy meter, the other end of the first resistor R1 is connected to the VCC power supply, the 2nd pin of the first transient suppression diode TVS1 is grounded, the cathode of the first diode D1 is connected to the cathode of the second diode D2 and one end of the seventh resistor R7, the other end of the third resistor R3 is connected to the PIN22 pin of the calculation chip, the other end of the seventh resistor R7 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is grounded; the seventh chip U2 The 10th pin of E is connected to one end of the ninth resistor R9 and the positive electrode of the second diode D2, the 11th pin of the seventh chip U2 E is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the eighth resistor R8 and the 1st pin of the second transient suppression diode TVS2 to form the reactive energy pulse output end of the electric energy meter, the other end of the eighth resistor R8 is connected to the VCC power supply, the 2nd pin of the second transient suppression diode TVS2 is grounded, and the other end of the ninth resistor R9 is connected to the PIN23 pin of the calculation chip; the multifunctional pulse output circuit of the electric energy meter is composed of the eighth chip U2F, three resistors R14~R16 and the third transient suppression diode TVS3, the 12th pin of the eighth chip U2F is connected to one end of the fifteenth resistor R15, the eighth chip U2 Pin 13 of F is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected to one end of the fourteenth resistor R14 and pin 1 of the third transient suppression diode TVS3 to form a multi-functional pulse output end of the electric energy meter, the other end of the fourteenth resistor R14 is connected to the VCC power supply, pin 2 of the third transient suppression diode TVS3 is grounded, and the other end of the fifteenth resistor R15 is connected to the PIN15 pin of the computing chip.

[0010] Furthermore, the standard active power pulse input circuit is composed of a third chip U2A and two resistors R17 and R18. Pin 1 of the third chip U2A is connected to one end of the seventeenth resistor and then connected to the standard active power pulse. Pin 2 of the third chip U2A is connected to one end of the eighteenth resistor. Pin 14 of the third chip U2A and the other end of the seventeenth resistor are connected to the VCC power supply. The other end of the eighteenth resistor is connected to pin PIN54 of the computing chip. Pin 7 of the third chip U2A is grounded.

[0011] Furthermore, the standard reactive energy pulse input circuit is composed of a fourth chip U2B and two resistors R22 and R23. Pin 3 of the fourth chip U2B is connected to one end of the twenty-second resistor and then connected to the standard reactive energy pulse. Pin 4 of the fourth chip U2B is connected to one end of the twenty-third resistor, the other end of the twenty-second resistor is connected to the VCC power supply, and the other end of the twenty-third resistor is connected to the PIN16 pin of the computing chip.

[0012] Furthermore, the standard clock pulse input circuit is composed of a fifth chip U2C and two resistors R24 and R25. Pin 5 of the fifth chip U2C is connected to one end of the twenty-fourth resistor and then to the standard clock pulse. Pin 6 of the fifth chip U2C is connected to one end of the twenty-fifth resistor, the other end of the twenty-fourth resistor is connected to the VCC power supply, and the other end of the twenty-fifth resistor is connected to pin PIN14 of the computing chip.

[0013] The beneficial effects of the present invention are:

[0014] The present invention can calibrate the active power and reactive power of the electric energy meter at the same time, shorten the calibration time, improve the calibration efficiency, and solve the technical problem that the existing electric energy meter calibration device cannot calibrate the active power and reactive power of the electric energy meter at the same time. Therefore, compared with the background technology, the present invention has the advantages of being able to calibrate the active power and reactive power of the electric energy meter at the same time and having high calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a circuit diagram of a three-phase standard electric energy meter of the present invention;

[0017] Figure 3 Schematic diagram of the circuit in the error calculator of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1As shown, a three-phase electric energy meter reactive power parallel calibration device in this embodiment includes a three-phase standard power source, a three-phase standard electric energy meter, a plurality of error calculators, a time base source and a server, the power input terminals of the three-phase standard power source and the three-phase standard electric energy meter are both connected to a 220V power supply, the three-phase voltage output terminal of the three-phase standard power source is connected in parallel with the three-phase voltage output terminal of the three-phase standard electric energy meter and then connected to the three-phase voltage terminals of the plurality of electric energy meters to be calibrated, the three-phase current output terminal of the three-phase standard power source and the three-phase current output terminal of the three-phase standard electric energy meter are connected to the three-phase current terminals of the plurality of electric energy meters to be calibrated, the active electric energy standard pulse and reactive electric energy standard pulse output terminals of the three-phase standard electric energy meter are connected to the active electric energy standard pulse and reactive electric energy standard pulse input terminals of the plurality of error calculators, the active pulse, reactive pulse and multi-function pulse output terminals of the plurality of error calculators are connected to The active pulse, reactive pulse and multi-function pulse ends of several three-phase electric energy meters that need to be calibrated are connected, the power supply ends of the time base source and the server are connected to the 220V power supply, the working power supply ends of the time base source and the server are connected to the working power supply 24V and the working power supply 5V, the standard time base pulse output end of the time base source is connected to the standard time base pulse input end of several error calculators, the RS485 communication end of the server is connected to the RS485 communication end of the error calculator, the electric meter communication interface of the server is connected to the communication interface of several electric energy meters that need to be calibrated, the communication interface of several error calculators is connected to the communication interface of several electric energy meters that need to be calibrated, the working power supply ends of several error calculators are connected to the working power supply 24V and the working power supply 5V, and the indicated voltages of the three-phase standard power source, the three-phase standard electric energy meter and the several electric energy meters that need to be calibrated are connected to the voltage indicator.

[0020] like Figure 2 As shown, the three-phase standard electric energy meter is composed of a digital signal processor (DSP), a field programmable gate array (FPGA), an active electric energy standard pulse output circuit and a reactive electric energy standard pulse output circuit. The output end of the digital signal processor is connected to the input end of the field programmable gate array through a data bus, and the output end of the field programmable gate array is connected to the input end of the active electric energy standard pulse circuit and the reactive electric energy standard pulse circuit.

[0021] The active electric energy standard pulse output circuit is composed of a first chip (74HC14) U1C, three resistors R4-R6, two transistors Q1, Q2, a first capacitor C1 and a first interface J1. Pin 5 of the first chip U1C is connected to pin PIN34 of the field programmable logic gate array, pin 6 of the first chip U1C is connected to one end of the fourth resistor R4, the base of the first transistor Q1, one end of the first capacitor C1 and the base of the second transistor Q2, the collector of the first transistor Q1 is connected to the VDD power supply, the emitter of the first transistor Q1 is connected to the other end of the fourth resistor R4, the other end of the first capacitor C1 and the collector of the second transistor Q2, and then connected to one end of the fifth and sixth resistors R5 and R6 connected in parallel, the other end of the fifth and sixth resistors R5 and R6 connected in parallel is connected to pin 1 of the first interface J1, the emitter of the second transistor Q2 and pin 3 of the first interface J1 are grounded, and pin 2 of the first interface J1 is connected to the VDD power supply.

[0022] The reactive electric energy standard pulse output circuit is composed of a second chip (74HC14) U1B, three resistors R11-R13, two transistors Q3 and Q4, a second capacitor C2 and a second interface J2. The 3rd pin of the second chip U1B is connected to the PIN35 pin of the field programmable logic gate array. The 4th pin of the second chip U1B is connected to one end of the eleventh resistor R11, the base of the third transistor Q3, one end of the second capacitor C2 and the base of the fourth transistor Q4. The collector of the third transistor Q3 is connected to the collector of the second transistor Q4. The electrode is connected to the VDD power supply, the emitter of the third triode Q3 is connected to the other end of the eleventh resistor R11, the other end of the second capacitor C2 and the collector of the fourth triode Q4, and then connected to one end of the twelfth and thirteenth resistors R12 and R13 connected in parallel, the other end of the twelfth and thirteenth resistors R12 and R13 connected in parallel is connected to pin 1 of the second interface J2, the emitter of the fourth triode Q2 and pin 3 of the second interface J2 are grounded, and pin 2 of the second interface J1 is connected to the VDD power supply.

[0023] like Figure 3As shown, the error calculator is composed of a standard active energy pulse input circuit, a standard reactive energy pulse input circuit, a standard clock pulse input circuit, an energy meter active energy pulse output circuit, an energy meter reactive energy pulse output circuit, an energy meter multifunctional pulse output circuit and a calculation chip (STM32F103RCT6) MCU. The energy meter active energy pulse output circuit and the energy meter reactive energy pulse output circuit are composed of a sixth and a seventh chip (74HC14) U2D and U2E, seven resistors R1-R3 and R7-R10, two diodes D1 and D2, a light emitting diode LED1, and two transient suppression diodes TVS1 and TVS2. The 9th pin of the sixth chip U2D is connected to one end of the third resistor R3. The 8th pin of the sixth chip U2D is connected to the positive electrode of the first diode D1, the 8th pin of the sixth chip U2D is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the first resistor R1 and the 1st pin of the first transient suppression diode TVS1 to form the active energy pulse output end of the electric energy meter, the other end of the first resistor R1 is connected to the VCC power supply, the 2nd pin of the first transient suppression diode TVS1 is grounded, the cathode of the first diode D1 is connected to the cathode of the second diode D2 and one end of the seventh resistor R7, the other end of the third resistor R3 is connected to the PIN22 pin of the calculation chip, the other end of the seventh resistor R7 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is grounded; the seventh chip U2 The 10th pin of E is connected to one end of the ninth resistor R9 and the positive electrode of the second diode D2, the 11th pin of the seventh chip U2 E is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the eighth resistor R8 and the 1st pin of the second transient suppression diode TVS2 to form the reactive energy pulse output end of the electric energy meter, the other end of the eighth resistor R8 is connected to the VCC power supply, the 2nd pin of the second transient suppression diode TVS2 is grounded, and the other end of the ninth resistor R9 is connected to the PIN23 pin of the calculation chip; the multifunctional pulse output circuit of the electric energy meter is composed of the eighth chip (74HC14) U2F, three resistors R14~R16 and the third transient suppression diode TVS3, the 12th pin of the eighth chip U2F is connected to one end of the fifteenth resistor R15, the eighth chip U2 Pin 13 of F is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected to one end of the fourteenth resistor R14 and pin 1 of the third transient suppression diode TVS3 to form a multi-functional pulse output end of the electric energy meter, the other end of the fourteenth resistor R14 is connected to the VCC power supply, pin 2 of the third transient suppression diode TVS3 is grounded, and the other end of the fifteenth resistor R15 is connected to the PIN15 pin of the computing chip.

[0024] The standard active electric energy pulse input circuit is composed of a third chip (74HC14) U2A and two resistors R17 and R18. Pin 1 of the third chip U2A is connected to one end of the seventeenth resistor and then connected to the standard active electric energy pulse. Pin 2 of the third chip U2A is connected to one end of the eighteenth resistor. Pin 14 of the third chip U2A and the other end of the seventeenth resistor are connected to the VCC power supply. The other end of the eighteenth resistor is connected to PIN54 of the calculation chip. Pin 7 of the third chip (74HC14) U2A is grounded.

[0025] The standard reactive energy pulse input circuit is composed of a fourth chip (74HC14) U2B and two resistors R22 and R23. Pin 3 of the fourth chip U2B is connected to one end of the twenty-second resistor and then connected to the standard reactive energy pulse. Pin 4 of the fourth chip U2B is connected to one end of the twenty-third resistor, the other end of the twenty-second resistor is connected to the VCC power supply, and the other end of the twenty-third resistor is connected to the PIN16 pin of the calculation chip.

[0026] The standard clock pulse input circuit is composed of a fifth chip U2C and two resistors R24 and R25. Pin 5 of the fifth chip U2C is connected to one end of the twenty-fourth resistor and then to the standard clock pulse. Pin 6 of the fifth chip U2C is connected to one end of the twenty-fifth resistor, the other end of the twenty-fourth resistor is connected to the VCC power supply, and the other end of the twenty-fifth resistor is connected to the PIN14 pin of the computing chip.

[0027] The verification principle of the present invention is:

[0028] The electric energy meter error verification method adopted by the present invention is to perform error verification according to the standard meter method in JJG596-2012 "Electronic AC Electric Energy Meter Verification Regulations". When the standard electric energy meter and the electric energy meter under test are both working continuously, the pulse (low frequency or high frequency) output by the electric energy meter under test is used to control the counting of the standard electric energy meter to determine the relative error of the electric energy meter under test, that is, the error verification unit calculates the relative error of the electric energy meter pulse and the standard meter pulse. The error formula is as follows:

[0029]

[0030] In formula (1): m is the measured pulse number; m0 is the calculated (or preset) pulse number. m0 is calculated according to formula (2):

[0031]

[0032] In formula (2): N is the number of low-frequency or high-frequency pulses of the electric energy meter under test; C0 is the (pulse) instrument constant of the standard meter, imp / kWh; C L—(pulse) meter constant of the electric energy meter under test, imp / kWh; K I and K u —The standard meter is connected to the external current and voltage transformer ratio. When there is no external current and voltage transformer, K I and Ku are both equal to 1.

Claims

1. A three-phase electric energy meter reactive power parallel verification device, characterized in that: The invention comprises a three-phase standard power source, a three-phase standard electric energy meter, several error calculators, a time base source and a server. The power input terminals of the three-phase standard power source and the three-phase standard electric energy meter are both connected to a 220V power supply. The three-phase voltage output terminal of the three-phase standard power source is connected in parallel with the three-phase voltage output terminal of the three-phase standard electric energy meter and then connected to the three-phase voltage terminals of several electric energy meters that need to be calibrated. The three-phase current output terminal of the three-phase standard power source and the three-phase current output terminal of the three-phase standard electric energy meter are connected to the three-phase current terminals of several electric energy meters that need to be calibrated. The active electric energy standard pulse and reactive electric energy standard pulse output terminals of the three-phase standard electric energy meter are connected to the active electric energy standard pulse and reactive electric energy standard pulse input terminals of several error calculators. The active pulse, reactive pulse and multi-function pulse output terminals of the several error calculators are connected to the three-phase electric energy meters that need to be calibrated. The active pulse, reactive pulse and multifunctional pulse terminal are connected, the power supply terminal of the time base source and the server is connected to the 220V power supply, the working power supply terminal of the time base source and the server is connected to the working power supply 24V and the working power supply 5V, the standard time base pulse output terminal of the time base source is connected to the standard time base pulse input terminal of several error calculators, the RS485 communication terminal of the server is connected to the RS485 communication terminal of the error calculator, the meter communication interface of the server is connected to the communication interface of several electric energy meters that need to be calibrated, the communication interface of the several error calculators is connected to the communication interface of several electric energy meters that need to be calibrated, the working power supply terminal of the several error calculators is connected to the working power supply 24V and the working power supply 5V, and the indicated voltage of the three-phase standard power source, the three-phase standard electric energy meter and the several electric energy meters that need to be calibrated is connected to the voltage indicator; The three-phase standard electric energy meter is composed of a digital signal processor, a field programmable logic gate array, an active electric energy standard pulse output circuit and a reactive electric energy standard pulse output circuit. The output end of the digital signal processor is connected to the input end of the field programmable logic gate array through a data bus, and the output end of the field programmable logic gate array is connected to the input end of the active electric energy standard pulse circuit and the reactive electric energy standard pulse circuit. The active electric energy standard pulse output circuit is composed of a first chip U1C, three resistors R4-R6, two transistors Q1, Q2, a first capacitor C1 and a first interface J1. Pin 5 of the first chip U1C is connected to pin PIN34 of the field programmable logic gate array, pin 6 of the first chip U1C is connected to one end of the fourth resistor R4, the base of the first transistor Q1, one end of the first capacitor C1 and the base of the second transistor Q2, the collector of the first transistor Q1 is connected to the VDD power supply, the emitter of the first transistor Q1 is connected to the other end of the fourth resistor R4, the other end of the first capacitor C1 and the collector of the second transistor Q2, and then connected to one end of the fifth and sixth resistors R5 and R6 in parallel, the other end of the fifth and sixth resistors R5 and R6 in parallel is connected to pin 1 of the first interface J1, the emitter of the second transistor Q2 and pin 3 of the first interface J1 are grounded, and pin 2 of the first interface J1 is connected to the VDD power supply; The reactive energy standard pulse output circuit is composed of a second chip U1B, three resistors R11-R13, two transistors Q3 and Q4, a second capacitor C2 and a second interface J2. Pin 3 of the second chip U1B is connected to pin PIN35 of the field programmable logic gate array, pin 4 of the second chip U1B is connected to one end of the eleventh resistor R11, the base of the third transistor Q3, one end of the second capacitor C2 and the base of the fourth transistor Q4, the collector of the third transistor Q3 is connected to the VDD power supply, the emitter of the third transistor Q3 is connected to the other end of the eleventh resistor R11, the other end of the second capacitor C2 and the collector of the fourth transistor Q4, and then connected to one end of the twelfth and thirteenth resistors R12 and R13 connected in parallel, the twelfth and thirteenth resistors R12, R13 are connected in parallel, and the twelfth and thirteenth resistors R12, R13 are connected in parallel. The other end of R13 after being connected in parallel is connected to pin 1 of the second interface J2, the emitter of the fourth transistor Q4 and pin 3 of the second interface J2 are grounded, and pin 2 of the second interface J2 is connected to the VDD power supply; The error calculator is composed of a standard active electric energy pulse input circuit, a standard reactive electric energy pulse input circuit, a standard clock pulse input circuit, an electric energy meter active electric energy pulse output circuit, an electric energy meter reactive electric energy pulse output circuit, an electric energy meter multifunctional pulse output circuit and a calculation chip. The electric energy meter active electric energy pulse output circuit and the electric energy meter reactive electric energy pulse output circuit are composed of a sixth and seventh chip U2D and U2E, seven resistors R1~R3 ​​and R7~R10, two diodes D1 and D2, a light-emitting diode LED1, and two transient suppression diodes TVS1 and TVS2. Pin 9 of the sixth chip U2D is connected to one end of the third resistor R3 and the positive electrode of the first diode D1. The 8th pin of the sixth chip U2D is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the first resistor R1 and the 1st pin of the first transient suppression diode TVS1 to form an active energy pulse output end of the electric energy meter, the other end of the first resistor R1 is connected to the VCC power supply, the 2nd pin of the first transient suppression diode TVS1 is grounded, the cathode of the first diode D1 is connected to the cathode of the second diode D2 and one end of the seventh resistor R7, the other end of the third resistor R3 is connected to the PIN22 pin of the calculation chip, the other end of the seventh resistor R7 is connected to the anode of the light-emitting diode LED1, and the cathode of the light-emitting diode LED1 is grounded; the seventh chip U2 The 10th pin of E is connected to one end of the ninth resistor R9 and the positive electrode of the second diode D2, the 11th pin of the seventh chip U2 E is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the eighth resistor R8 and the 1st pin of the second transient suppression diode TVS2 to form the reactive energy pulse output end of the electric energy meter, the other end of the eighth resistor R8 is connected to the VCC power supply, the 2nd pin of the second transient suppression diode TVS2 is grounded, and the other end of the ninth resistor R9 is connected to the PIN23 pin of the calculation chip; the multifunctional pulse output circuit of the electric energy meter is composed of the eighth chip U2F, three resistors R14~R16 and the third transient suppression diode TVS3, the 12th pin of the eighth chip U2F is connected to one end of the fifteenth resistor R15, the eighth chip U2 The 13th foot of F is connected to one end of the 16th resistor R16, the other end of the 16th resistor R16 is connected to one end of the 14th resistor R14 and the 1st foot of the third transient suppression diode TVS3 to form a multi-functional pulse output end of the electric energy meter, the other end of the 14th resistor R14 is connected to the VCC power supply, the 2nd foot of the third transient suppression diode TVS3 is grounded, and the other end of the 15th resistor R15 is connected to the PIN15 foot of the calculation chip; The model of the first chip U1C, the second chip U1B, the sixth chip U2D, the seventh chip U2E and the eighth chip U2F is 74HC14; The model of the computing chip is STM32F103RCT6.

2. A three-phase electric energy meter reactive power parallel verification device according to claim 1, characterized in that: The standard active electric energy pulse input circuit is composed of a third chip U2A and two resistors R17 and R18. Pin 1 of the third chip U2A is connected to one end of the seventeenth resistor and then connected to the standard active electric energy pulse. Pin 2 of the third chip U2A is connected to one end of the eighteenth resistor. Pin 14 of the third chip U2A and the other end of the seventeenth resistor are connected to the VCC power supply. The other end of the eighteenth resistor is connected to pin PIN54 of the computing chip. Pin 7 of the third chip U2A is grounded. The model of the third chip U2A is 74HC14.

3. A three-phase electric energy meter reactive power parallel verification device according to claim 1, characterized in that: The standard reactive energy pulse input circuit is composed of a fourth chip U2B and two resistors R22 and R23. Pin 3 of the fourth chip U2B is connected to one end of the twenty-second resistor and then to the standard reactive energy pulse. Pin 4 of the fourth chip U2B is connected to one end of the twenty-third resistor, the other end of the twenty-second resistor is connected to the VCC power supply, and the other end of the twenty-third resistor is connected to the PIN16 pin of the computing chip. The model of the fourth chip U2B is 74HC14.

4. A three-phase electric energy meter reactive power parallel verification device according to claim 1, characterized in that: The standard clock pulse input circuit is composed of a fifth chip U2C and two resistors R24 and R25. Pin 5 of the fifth chip U2C is connected to one end of the twenty-fourth resistor and then to the standard clock pulse. Pin 6 of the fifth chip U2C is connected to one end of the twenty-fifth resistor, the other end of the twenty-fourth resistor is connected to the VCC power supply, and the other end of the twenty-fifth resistor is connected to the PIN14 pin of the computing chip. The model of the fifth chip U2C is 74HC14.

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