CN207096430U - Harmonic generator for intelligent electric energy meter detection - Google Patents

Harmonic generator for intelligent electric energy meter detection Download PDF

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Publication number
CN207096430U
CN207096430U CN201720926024.9U CN201720926024U CN207096430U CN 207096430 U CN207096430 U CN 207096430U CN 201720926024 U CN201720926024 U CN 201720926024U CN 207096430 U CN207096430 U CN 207096430U
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China
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resistance
amplifier
transformer
diode
output
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CN201720926024.9U
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Chinese (zh)
Inventor
朱亮
胡涛
刘程
刘玲
梅贱生
赵燕
朱丹
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Hunan University
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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Hunan University
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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Abstract

It the utility model is related to a kind of harmonic generator for intelligent electric energy meter detection, including signal generator, transformer T1, input stage circuit, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R411, amplifier A6, voltage amplifier circuit, power amplification circuit, transformer T2, transformer T3, current transformer TA1, voltage transformer TV1, switch S1, rectified feedback circuit, comparison circuit, phototube coupling unit, triode Q1 and voltage-regulator diode D1.Harmonic signal needed for being produced by signal generator, frequency equilibrium amplification is carried out to harmonic signal, it is ensured that the amplitude after each harmonic amplification output is consistent;DC feedback and AC regeneration are introduced by rectified feedback circuit, realizes that signal quickly and is accurately adjusted, is tested available for intelligent electric energy meter higher hamonic wave.

Description

Harmonic generator for intelligent electric energy meter detection
Technical field
The utility model category Electric Energy Metering Technology field, in particular to a kind of height for intelligent electric energy meter detection Subharmonic generator.
Background technology
All kinds of non-linear electrical equipments, transformer and all kinds of iron-core reactors are all the harmonic sources in power network.With all kinds of The growth of harmonic source capacity, influence of the harmonic wave to electric energy metrical are also increasingly taken seriously.The electric energy meter standard GB/ in China at present T17215 defines method and the requirement of electric energy meter harmonic effects amount experiment, but the stress_responsive genes waveform proposed can not be complete It is all-trans and reflects the actual live operating condition of electric energy meter.
The international recommendation of R46 electric energy meters and the electric energy meter standard EN50470 in Europe that OIML formulates, increase The experiment that higher hamonic wave, square wave and peaked wave influence on electric energy meter error.The asynchronous examination of higher hamonic wave influence amount test requirements document The magnitude of voltage for testing signal is 0.02Unom, current value 0.1Itr, and by the asynchronous experiment of the frequency sweep from 15fnom to 40fnom Signal is first added to potential circuit, then the current circuit that is added to, and measures the error deviation relative to constant error under sine condition; Square wave and the experiment of peaked wave influence amount then define 1,3,5,7,11 and 13 voltage of test signal and the amplitude and phase of electric current Position.
Existing harmonic oscillator, amplification characteristic of its incorporated amplifier under different frequency signals is different, adds Power supply lacks the closed-loop control of monitoring output voltage and current signal in itself so that the amplitude of each harmonic can not reach setting Value.During experiment, test signal waveform can be distorted, and have impact on the test result of electric energy meter harmonic effects amount experiment.
Utility model content
The purpose of this utility model is for overcome the deficiencies in the prior art, there is provided a kind of to be used for what intelligent electric energy meter detected Harmonic generator, all kinds of voltage and the current harmonics waveforms for meeting R46 international recommendations can be produced, be each rahmonic of electric energy meter Influence amount experiment provides test signal.
In order to solve the above-mentioned technical problem, the utility model is to be achieved through the following technical solutions:
For the harmonic generator of intelligent electric energy meter detection, including:Signal generator, transformer T1, input stage electricity Road, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R411, amplifier A6, voltage are put Big circuit, power amplification circuit, transformer T2, transformer T3, current transformer TA1, voltage transformer TV1, switch S1, rectification Feedback circuit, comparison circuit, phototube coupling unit, triode Q1 and voltage-regulator diode D1.
The AC ports output harmonic wave signal of signal generator is simultaneously connected with transformer T1 primary side, and transformer T1's is secondary The input of side and input stage circuit connects;The output end of input stage circuit is through electric capacity C2 and resistance R2 and amplifier A6 end of oppisite phase Connection;Resistance R411 both ends are connected with amplifier A6 backward end and output end respectively;Amplifier A6 end in the same direction ground connection;Put Big device A6 output end is connected to voltage amplifier circuit, the output end of voltage amplifier circuit and the input of power amplification circuit End connection;The output end of power amplification circuit is connected with one end of transformer T2 first side windings, transformer T2 first side windings The other end be grounded through resistance R4, while be connected through resistance R3 with amplifier A6 end of oppisite phase;Transformer T2 secondary side voltage For voltage output signal Vout;Transformer T2 secondary side output current is changed into current output signal I by transformer T3out;Electricity Press transformer TV1 monitoring voltage output signals Vout;Current transformer TA1 monitoring current output signals Iout;Voltage transformer TV1 Secondary side summation current transformer TA1 secondary side can be connected with switch S1, the switch S1 other ends and rectified feedback circuit input End connection;One output end of rectified feedback circuit and the input of comparison circuit connect;The DCref ends output of signal generator Reference signal is simultaneously connected with another input of comparison circuit;Another output end of rectified feedback circuit is through electric capacity C1 and electricity Resistance R1 is connected with amplifier A6 end of oppisite phase;Signal generator BJ ends input alarm signal and with the output end of phototube coupling unit Connection, the input of phototube coupling unit are connected with triode Q1 colelctor electrode, and the power supply of phototube coupling unit is+U;Three Pole pipe Q1 emitting stage ground connection;Triode Q1 base stage connects with voltage-regulator diode D1 anode, voltage-regulator diode D1 negative electrode Connected with the output end of comparison circuit.
Further preferably, described input stage circuit, including:Amplifier A4, multiplier, amplifier A5, resistance R11, electricity Hinder R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, electric capacity C11, electric capacity C12 and electric capacity C13.Resistance R11 one end is connected to transformer T1 secondary side winding, and the other end is connected to amplifier A4 end of oppisite phase;Resistance R12 and electricity It is in parallel to hold C11, two ends are connected with amplifier A4 end of oppisite phase and output end respectively;Amplifier A4 in-phase end ground connection, amplifier Input connection of the A4 output end through resistance R13 and multiplier, it is electric that another input of multiplier is connected to comparison The output end on road, the output end of multiplier are connected through resistance R14 with amplifier A5 in-phase end;Amplifier A5 in-phase end is through electricity Hinder R15 ground connection;Resistance R16 is in parallel with electric capacity C12, and one end ground connection, the other end is connected to amplifier A5 end of oppisite phase;Resistance R17 In parallel with electric capacity C13, two ends are connected with amplifier A5 end of oppisite phase and output end respectively;Amplifier A5 output end and electric capacity C2 One end connection.
Further preferably, described comparison circuit, including:Amplifier A1, amplifier A3, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, diode D21 and diode D22.Resistance R21 one end and signal generator DCref End connection, the other end are connected with amplifier A1 end of oppisite phase;The in-phase end ground connection of amplifier;The ends of resistance R22 bis- respectively with amplification Device A1 inverting input is connected with amplifier A1 output end;Amplifier A1 output is same through resistance R24's and amplifier A3 Phase end connects;Resistance R23 one end is connected with an output end of rectified feedback circuit, the end of oppisite phase of the other end and amplifier A3 Connection;Resistance R25 is in parallel with diode D21, diode D21 anode and the negative electrode end of oppisite phase with amplifier A3 and output respectively End is connected;Diode D22 anode is connected with amplifier A3 output end, resistance R26 one end and diode D22 negative electrode phase Even, other end ground connection.
Further preferably, described rectified feedback circuit, including:Amplifier A31, amplifier A32, amplifier A33, amplification Device A2, resistance R311, resistance R312, resistance R313, resistance R314, resistance R315, resistance R316, resistance R317, resistance R318, Resistance R319, resistance R320, resistance R321, resistance R322, resistance R323, resistance R324, electric capacity C31, electric capacity C32, diode D31, diode D32, diode D33, diode D34, triode Q31 and triode Q32.Amplifier A31 end of oppisite phase is with opening Close S1 one end connection, amplifier A31 in-phase end ground connection;Resistance R311 one end is connected with amplifier A31 end of oppisite phase;Put Big device A2 end of oppisite phase is connected through resistance R321 with the resistance R311 other end, and the resistance R311 other end is with resistance R315's One end connects;Amplifier A2 in-phase end ground connection;Resistance R322 both ends connect with amplifier A2 end of oppisite phase and output end respectively Connect;Resistance R312 two ends are connected with triode Q31 colelctor electrode and base stage respectively;Triode Q31 colelctor electrode and power supply+U Connection;Diode D31 anode and negative electrode is connected with triode Q31 base stage and amplifier A31 output end respectively;Triode Q31 emitter stage is connected through resistance R314 with resistance R315 one end, the resistance R315 other end and triode Q32 emitter stage Connection;Diode D32 anode and negative electrode is connected with diode D31 negative electrode and triode Q32 base stage respectively;Triode Q32 colelctor electrode is connected with power end-U;Resistance R313 two ends are connected with triode Q32 base stage and colelctor electrode respectively;Electricity It is in parallel to hinder R324 and electric capacity C32, one end is connected through resistance R323 with amplifier A33 output end, other end ground connection;Electric capacity C31 In parallel with resistance R320, two ends are connected with amplifier A33 end of oppisite phase and output end respectively;Amplifier A33 in-phase end ground connection; Amplifier A33 end of oppisite phase is connected through resistance R319 with diode D34 anode, and diode D34 negative electrode is with amplifier A32's Output end connects;Resistance R317 two ends are connected with diode D34 anode and amplifier A32 end of oppisite phase respectively;Diode D33 anode and negative electrode is connected with amplifier A32 output end and end of oppisite phase respectively;Amplifier A32 end of oppisite phase is through resistance R316 is connected with resistance R315 one end;Resistance R318 two ends are anti-phase with resistance R315 one end and amplifier A33 respectively End connection.
Compared with prior art, the beneficial effects of the utility model are:The utility model provides one kind and is used for intelligent electric energy The harmonic generator of table detection, required harmonic signal is produced by signal generator, it is equal to enter line frequency to harmonic signal Weighing apparatus amplification, it is ensured that the amplitude after each harmonic amplification output is consistent;Introduce DC feedback by rectified feedback circuit and exchange instead Feedback, realize that signal quickly and is accurately adjusted, tested available for intelligent electric energy meter higher hamonic wave.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is input stage circuit schematic diagram of the present utility model;
Fig. 3 is comparison circuit schematic diagram of the present utility model;
Fig. 4 is rectified feedback circuit diagram of the present utility model.
In Fig. 1-Fig. 4,1,2,3,4,5,6,7,8,9,10,11 represent connection circuitry, for aiding in those skilled in the art Combined circuit figure is better understood from the mode of connection of electronic component, it is easier to implementation the utility model.
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is theory diagram of the present utility model, for the harmonic generator of intelligent electric energy meter detection, including:Letter Number generator, transformer T1, input stage circuit, electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R411, amplifier A6, voltage amplifier circuit, power amplification circuit, transformer T2, transformer T3, current transformer TA1, voltage transformer TV1, switch S1, rectified feedback circuit, comparison circuit, phototube coupling unit, triode Q1 and voltage stabilizing two Pole pipe D1.The AC ports output higher hamonic wave signal of signal generator simultaneously connects through the input of transformer T1 and input stage circuit Connect;The output end of input stage circuit is connected through electric capacity C2 and resistance R2 with amplifier A6 end of oppisite phase;Resistance R411 both ends difference It is connected with amplifier A6 backward end and output end;Amplifier A6 end in the same direction ground connection;Voltage amplifier circuit is by amplifier A6's Output signal voltage amplifies, then the carry out power amplification through rate amplifying circuit, through transformer T2 voltage transformations, its secondary side voltage For voltage output signal Vout;Transformer T2 secondary side output current is changed into current output signal I by transformer T3out;Electricity Press transformer TV1 monitoring voltage output signals Vout;Current transformer TA1 monitoring current output signals Iout;When output voltage is believed Number VoutWhen, switch S1 is connected with voltage transformer TV1 secondary side;As output current signal IoutWhen, switch S1 and electric current is mutual Sensor TA1 secondary side connection.
Switch the S1 other ends be connected with rectified feedback circuit input end, an output end of rectified feedback circuit with it is more electric The input connection on road;The DCref ends output reference signal of signal generator is simultaneously connected with another input of comparison circuit, Form DC feedback;Another output end of rectified feedback circuit is connected through electric capacity C1 and resistance R1 with amplifier A6 end of oppisite phase, Form AC regeneration.
The BJ ends input alarm signal of signal generator is simultaneously connected, Phototube Coupling list with the output end of phototube coupling unit The input of member is connected with triode Q1 colelctor electrode, and the power supply of phototube coupling unit is+U;Triode Q1 emitting stage Ground connection;Triode Q1 base stage connects with voltage-regulator diode D1 anode, voltage-regulator diode D1 negative electrode and comparison circuit it is defeated Go out end connection, as the voltage signal V of outputoutOr current signal IoutWhen differing too big with reference value, device can automatic alarm.
Fig. 2 is input stage circuit schematic diagram of the present utility model, and the input stage circuit includes:Amplifier A4, multiplier, Amplifier A5, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, electric capacity C11, electric capacity C12 and electric capacity C13;Resistance R11 one end is connected to transformer T1 secondary side winding, and the other end is connected to the anti-of amplifier A4 Xiang Duan;Resistance R12 is in parallel with electric capacity C11, and two ends are connected with amplifier A4 end of oppisite phase and output end respectively;Amplifier A4's is same Phase end is grounded, input connection of the amplifier A4 output end through resistance R13 and multiplier, another input of multiplier End is connected to the output end of comparison circuit, and the output end of multiplier is connected through resistance R14 with amplifier A5 in-phase end;Amplifier A5 in-phase end is grounded through resistance R15;Resistance R16 is in parallel with electric capacity C12, and one end ground connection, the other end is connected to amplifier A5's End of oppisite phase;Resistance R17 is in parallel with electric capacity C13, and two ends are connected with amplifier A5 end of oppisite phase and output end respectively;Amplifier A5's Output end is connected with electric capacity C2 one end.
Higher hamonic wave signal caused by signal generator AC ends, input stage circuit is input to after transformer T1;Amplifier After the anti-phase amplifications of A4, the input all the way as multiplier;Another input end signal of multiplier is that the direct current of comparison circuit output is anti- Feedback signal, multiplier output signal is adjusted by DC feedback signal;The signal of multiplier output enters line frequency by amplifier A5 Equilibrium amplification, by the size of capacitance value, adjustment signal is in different frequency dot gains size.
Fig. 3 is comparison circuit schematic diagram of the present utility model, and the comparison circuit includes:Amplifier A1, amplifier A3, electricity Hinder R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, diode D21 and diode D22;Resistance R21 mono- End is connected with signal generator DCref ends, and the other end is connected with amplifier A1 end of oppisite phase;The in-phase end ground connection of amplifier;Electricity Resistance R22 bis- ends are connected with amplifier A1 inverting input and amplifier A1 output end respectively;Amplifier A1 output is through electricity Resistance R24 connects with amplifier A3 in-phase end;Resistance R23 one end is connected with an output end of rectified feedback circuit, another End is connected with amplifier A3 end of oppisite phase;Resistance R25 is in parallel with diode D21, and diode D21 anode and negative electrode is respectively with putting Big device A3 end of oppisite phase is connected with output end;Diode D22 anode is connected with amplifier A3 output end, and the one of resistance R26 End is connected with diode D22 negative electrode, other end ground connection.
The signal rectification that rectified feedback circuit gathers voltage transformer TV1 or current transformer TA1, as comparison circuit Input all the way, with after the anti-phase amplifications of amplifier A1 signal generator DCref ends output DC reference signal compared with:Than When DC reference signal is less than normal, diode D21 reversely ends, and amplifier A3 is operated in magnifying state, output signal increase;Than straight When flow reference signal is bigger than normal, diode D21 conductings, amplifier A3 becomes emitter follower circuit, reduces output signal.
Fig. 4 is rectified feedback circuit diagram of the present utility model, and the rectified feedback circuit includes:Amplifier A31, put Big device A32, amplifier A33, amplifier A2, resistance R311, resistance R312, resistance R313, resistance R314, resistance R315, resistance R316, resistance R317, resistance R318, resistance R319, resistance R320, resistance R321, resistance R322, resistance R323, resistance R324, Electric capacity C31, electric capacity C32, diode D31, diode D32, diode D33, diode D34, triode Q31 and triode Q32; Amplifier A31 end of oppisite phase is connected with switching S1 one end, amplifier A31 in-phase end ground connection;Resistance R311 one end is with putting Big device A31 end of oppisite phase connection;Amplifier A2 end of oppisite phase is connected through resistance R321 with the resistance R311 other end, resistance R311 The other end be connected with resistance R315 one end;Amplifier A2 in-phase end ground connection;Resistance R322 both ends respectively with amplifier A2 end of oppisite phase connects with output end;Resistance R312 two ends are connected with triode Q31 colelctor electrode and base stage respectively;Triode Q31 colelctor electrode is connected with power supply+U;The diode D31 anode and negative electrode base stage and amplifier A31 with triode Q31 respectively Output end connection;Triode Q31 emitter stage is connected through resistance R314 with resistance R315 one end, the resistance R315 other end It is connected with triode Q32 emitter stage;The diode D32 anode and negative electrode negative electrode and triode Q32 with diode D31 respectively Base stage connection;Triode Q32 colelctor electrode is connected with power end-U;The resistance R313 two ends base with triode Q32 respectively Pole connects with colelctor electrode;Resistance R324 and electric capacity C32 is in parallel, and one end is connected through resistance R323 with amplifier A33 output end, separately One end is grounded;Electric capacity C31 and resistance R320 is in parallel, and two ends are connected with amplifier A33 end of oppisite phase and output end respectively;Amplifier A33 in-phase end ground connection;Amplifier A33 end of oppisite phase is connected through resistance R319 with diode D34 anode, diode D34's Negative electrode is connected with amplifier A32 output end;Resistance R317 two ends respectively with diode D34 anode and amplifier A32 End of oppisite phase connects;Diode D33 anode and negative electrode is connected with amplifier A32 output end and end of oppisite phase respectively;Amplifier A32 End of oppisite phase be connected through resistance R316 with resistance R315 one end;Resistance R318 two ends are respectively with resistance R315 one end and putting Big device A33 end of oppisite phase connection.
The output end signal that rectified feedback circuit gathers voltage transformer TV1 or current transformer TA1, feeds back to prime In circuit;AC regeneration signal is exported from amplifier A2, amplifier A6 end in the same direction is inputed to through electric capacity C1 and resistance R1, is realized AC regeneration is adjusted;Amplifier A31 and triode Q31 and triode Q32 is enough into Class B amplifying circuit, when amplifier A31 is reverse When input end signal is in positive half cycle, triode Q31 cut-offs, triode Q32 work;When amplifier A31 reverse input end signals During in negative half period, triode Q31 work, triode Q32 cut-offs;Amplifier A32 and amplifier A33 forms precision rectifying electricity AC signal rectifying and wave-filtering is direct current signal by road and inputs to comparison circuit, realizes that DC feedback is adjusted.
The undeclared part being related in the utility model is same as the prior art or is realized using prior art.

Claims (4)

1. for the harmonic generator of intelligent electric energy meter detection, including:Signal generator, transformer T1, input stage circuit, Electric capacity C1, electric capacity C2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R411, amplifier A6, voltage amplification electricity Road, power amplification circuit, transformer T2, transformer T3, current transformer TA1, voltage transformer TV1, switch S1, rectified feedback Circuit, comparison circuit, phototube coupling unit, triode Q1 and voltage-regulator diode D1;It is characterized in that:The AC ports of signal generator Output harmonic wave signal is simultaneously connected with transformer T1 primary side, and transformer T1 secondary side and the input of input stage circuit connect Connect;The output end of input stage circuit is connected through electric capacity C2 and resistance R2 with amplifier A6 end of oppisite phase;Resistance R411 both ends difference It is connected with amplifier A6 backward end and output end;Amplifier A6 end in the same direction ground connection;Amplifier A6 output end is connected to electricity Amplifier circuit is pressed, the output end of voltage amplifier circuit and the input of power amplification circuit connect;Power amplification circuit Output end is connected with one end of transformer T2 first side windings, and the other end of transformer T2 first side windings is grounded through resistance R4, It is connected simultaneously through resistance R3 with amplifier A6 end of oppisite phase;Transformer T2 secondary side voltage is voltage output signal Vout;Transformation Transformer T2 secondary side output current is changed into current output signal I by device T3out;Voltage transformer TV1 monitoring voltages export Signal Vout;Current transformer TA1 monitoring current output signals Iout;Voltage transformer TV1 secondary side summation current transformer TA1 Secondary side can with switch S1 be connected, switch the S1 other ends be connected with rectified feedback circuit input end;The one of rectified feedback circuit The input of individual output end and comparison circuit connects;Signal generator DCref ends output reference signal and with comparison circuit Another input connects;Another output end of rectified feedback circuit connects through electric capacity C1 and resistance R1 and amplifier A6 end of oppisite phase Connect;Signal generator BJ ends input alarm signal simultaneously be connected with the output end of phototube coupling unit, phototube coupling unit it is defeated Enter end to be connected with triode Q1 colelctor electrode, the power supply of phototube coupling unit is+U;Triode Q1 emitting stage ground connection;Three Pole pipe Q1 base stage connects with voltage-regulator diode D1 anode, and voltage-regulator diode D1 negative electrode and the output end of comparison circuit connect Connect.
2. the harmonic generator according to claim 1 for intelligent electric energy meter detection, it is characterized in that:The input Level circuit includes:Amplifier A4, multiplier, amplifier A5, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, Resistance R16, resistance R17, electric capacity C11, electric capacity C12 and electric capacity C13;Resistance R11 one end is connected to transformer T1 secondary side Winding, the other end are connected to amplifier A4 end of oppisite phase;Resistance R12 is in parallel with electric capacity C11, and two ends are anti-with amplifier A4 respectively Phase end connects with output end;Amplifier A4 in-phase end ground connection, one through resistance R13 and multiplier of amplifier A4 output end Input connects, and another input of multiplier is connected to the output end of comparison circuit, and the output end of multiplier is through resistance R14 It is connected with amplifier A5 in-phase end;Amplifier A5 in-phase end is grounded through resistance R15;Resistance R16 is in parallel with electric capacity C12, and one End ground connection, the other end are connected to amplifier A5 end of oppisite phase;Resistance R17 is in parallel with electric capacity C13, and two ends are respectively with amplifier A5's End of oppisite phase connects with output end;Amplifier A5 output end is connected with electric capacity C2 one end.
3. the harmonic generator according to claim 1 for intelligent electric energy meter detection, it is characterized in that:The comparison Circuit includes:Amplifier A1, amplifier A3, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, two Pole pipe D21 and diode D22;Resistance R21 one end is connected with signal generator DCref ends, and the other end is anti-phase with amplifier A1's End connection;The in-phase end ground connection of amplifier;The ends of resistance R22 bis- are defeated with amplifier A1 inverting input and amplifier A1 respectively Go out end to be connected;Amplifier A1 output connects through resistance R24 with amplifier A3 in-phase end;Resistance R23 one end and rectification are anti- The output end connection of current feed circuit, the other end are connected with amplifier A3 end of oppisite phase;Resistance R25 is in parallel with diode D21, and two Pole pipe D21 anode and negative electrode is connected with amplifier A3 end of oppisite phase and output end respectively;Diode D22 anode and amplifier A3 output end is connected, and resistance R26 one end is connected with diode D22 negative electrode, other end ground connection.
4. the harmonic generator according to claim 1 for intelligent electric energy meter detection, it is characterized in that:The rectification Feedback circuit includes:Amplifier A31, amplifier A32, amplifier A33, amplifier A2, resistance R311, resistance R312, resistance R313, resistance R314, resistance R315, resistance R316, resistance R317, resistance R318, resistance R319, resistance R320, resistance R321, Resistance R322, resistance R323, resistance R324, electric capacity C31, electric capacity C32, diode D31, diode D32, diode D33, two level Pipe D34, triode Q31 and triode Q32;Amplifier A31 end of oppisite phase is connected with switching S1 one end, and amplifier A31's is same Phase end is grounded;Resistance R311 one end is connected with amplifier A31 end of oppisite phase;Amplifier A2 end of oppisite phase is through resistance R321 and electricity R311 other end connection is hindered, the resistance R311 other end is connected with resistance R315 one end;Amplifier A2 in-phase end ground connection; Resistance R322 both ends are connected with amplifier A2 end of oppisite phase and output end respectively;Resistance R312 two ends respectively with triode Q31 colelctor electrode connects with base stage;Triode Q31 colelctor electrode is connected with power supply+U;Diode D31 anode and negative electrode difference It is connected with triode Q31 base stage and amplifier A31 output end;Triode Q31 emitter stage is through resistance R314 and resistance R315 one end connection, the resistance R315 other end are connected with triode Q32 emitter stage;Diode D32 anode and negative electrode It is connected respectively with diode D31 negative electrode and triode Q32 base stage;Triode Q32 colelctor electrode is connected with power end-U;Electricity Resistance R313 two ends are connected with triode Q32 base stage and colelctor electrode respectively;Resistance R324 and electric capacity C32 is in parallel, and one end is through electricity Resistance R323 is connected with amplifier A33 output end, other end ground connection;Electric capacity C31 and resistance R320 are in parallel, two ends respectively with amplification Device A33 end of oppisite phase connects with output end;Amplifier A33 in-phase end ground connection;Amplifier A33 end of oppisite phase through resistance R319 with Diode D34 anode connection, diode D34 negative electrode are connected with amplifier A32 output end;Resistance R317 two ends difference It is connected with diode D34 anode and amplifier A32 end of oppisite phase;Diode D33 anode and negative electrode respectively with amplifier A32 Output end connected with end of oppisite phase;Amplifier A32 end of oppisite phase is connected through resistance R316 with resistance R315 one end;Resistance R318 Two ends be connected respectively with resistance R315 one end and amplifier A33 end of oppisite phase.
CN201720926024.9U 2017-07-28 2017-07-28 Harmonic generator for intelligent electric energy meter detection Withdrawn - After Issue CN207096430U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108020806A (en) * 2017-07-28 2018-05-11 国网江西省电力公司电力科学研究院 Harmonic generator for intelligent electric energy meter detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108020806A (en) * 2017-07-28 2018-05-11 国网江西省电力公司电力科学研究院 Harmonic generator for intelligent electric energy meter detection
CN108020806B (en) * 2017-07-28 2019-11-26 国网江西省电力公司电力科学研究院 Harmonic generator for intelligent electric energy meter detection

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