CN1026161C - Program control testing device for electric equipment - Google Patents

Program control testing device for electric equipment Download PDF

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CN1026161C
CN1026161C CN 90108342 CN90108342A CN1026161C CN 1026161 C CN1026161 C CN 1026161C CN 90108342 CN90108342 CN 90108342 CN 90108342 A CN90108342 A CN 90108342A CN 1026161 C CN1026161 C CN 1026161C
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resistance
amplifier
triode
voltage
assembly
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CN1060718A (en
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龚学长
向瑞林
常连齐
周曙光
姚卫东
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MIANYANG POWER SUPPLY SECTION CHENGDU RAILWAY OFFICE
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MIANYANG POWER SUPPLY SECTION CHENGDU RAILWAY OFFICE
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Abstract

The present invention relates to a program control testing device for an electric device, which is composed of a computer (1), a multifunctional program control instrument (2), a sine signal generator (3) with the functions of frequency adjustment, amplitude adjustment and phase adjustment, power amplifiers (4, 5), a relay switching box (6), a printer (7) and circuits (8, 9, 13) specially used for testing high-voltage electric devices. The program control testing device is controlled by the multifunctional program control instrument (2), so that various programs are solidified in a single-board computer and an expansion module EPROM. The present invention uses command numbers for input, and has the functions of automatically testing various high/low voltage electric devices in an electric power system and carrying out comprehensive linkage tests on protective discs of various relay devices. The program control testing device can also print and tabulate test results, and can manage the test results in files.

Description

Program control testing device for electric equipment
The present invention relates to the detection test unit of electrical equipment, especially a kind of program control testing device that distribution equipment in the electric system is detected and tests.
Along with technical development of computer, electrical test appliance arrangement testing tool in the electric system begins to intellectuality, the incorporate direction of instrument develops, " motor-driven inspection vehicle " this car owner that typical as Japanese eternally happy Electric Co., Ltd releases will be by program control instrument, and the a-b box that experiment power supply and relay are formed is formed.Owing to adopted computer technology Processing Test result and part process; can not only test and test single relay; can also carry out unit interlock test to the relay protection dish of standard; because it is contained in all equipment on the instruction carriage; thereby has mobility preferably; but its weak point is this car and can only carries out testing experiment to relay; do not possess the function that high voltage electric equipment is tested; its experiment power supply is to realize pressure regulation by transformer tapping in addition; thereby the variation of experiment power supply is narrower; test accuracy is vulnerable to the influence of power-supply fluctuation and frequency wave form varies, can not adapt to the test request of higher occasion.It is fixed that capacitance-resistance is also used in phase shift, only is useful for the fixing equipment of phase place.
" relay " magazine serves as the device that topic discloses the check of a kind of relay parameter automatization with " relay automated debug device " in the second phase in 1988, but this device being provided with can be adjusted the amplitude modulation phase modulation sinusoidal signal generator of its output and the experiment power supply that amplifirer is formed by controller.Overcome the shortcoming of aforementioned " motor-driven inspection vehicle " experiment power supply, its weak point is that this device can only test the single relay of part, can not carry out testing experiment to switchboard in the electric system and high voltage electric equipment.Do not possess and print the management function of tabulating and finishing profile.
Purpose of the present invention; provide a kind of computer technology that makes full use of with regard to being at the deficiencies in the prior art; use programme controlled mode; but adopt the sine wave signal generator of amplitude modulation phase modulation frequency modulation of the prior art; the relay a-b box; setting is than high power amplifier; be specifically designed to the various specialized circuitry of high voltage electric equipment being carried out testing experiment; to finish to all kinds of height in the electric system; all kinds of relay protection dishes that the testing experiment of low voltage electrical equipment reaches standard carry out unit interlock test; can also show; print tabulation, carry out a kind of program control testing device for electric equipment of data management.
Realize the technical scheme that the object of the invention provided be (referring to Fig. 1～Fig. 6):
A kind of program control testing device for electric equipment comprises: computing machine (1), controller (2), but can control the sinusoidal signal generator (3) of its generation amplitude modulation phase modulation frequency modulation and the experiment power supply that power amplifier is formed by controller for one, experiment power supply is switched to the relay a-b box (6) of tested electrical equipment by controller (2) requirement, printer (7), power supply is characterized in that:
The controller of described program control testing device for electric equipment (2) is by single board computer (21), memory expansion module (22) and be used for the feedback signal of tested electrical equipment is sent into a multiprogrammability instrument that sample circuit constituted that is composed in series by input switch (23) sampling holder (24) analog to digital converter (25) of computing machine (21), its whole control programs, test routine are solidificated in single board computer (21) internal memory EPROM and the memory expansion module (22);
But the power amplifier that is used to amplify the sine wave signal generator output signal of amplitude modulation phase modulation frequency modulation in the experiment power supply of described program control testing device for electric equipment is current power amplifier two parallel connections and that structure is identical (5) and voltage power amplifier (4), this amplifier (4,5) comprises one respectively by amplifier module U 1, resistance R 3-R 8, capacitor C 2-C 4The operational amplifier of being formed, one by one group of NPN high power valve T 1, T 3-T 13And one group of PNP large power triode T 2, T 14-T 24And resistance R 9-R 34, diode D 1-D 3The polarity-inverting amplifier of forming, one by resistance R 35, R 36, capacitor C 5The absorption circuit of forming, a transformer BY 1; Its line construction is: but amplitude modulation frequency modulation phase modulation sinusoidal signal generator (3) is by capacitance C 1Meet components for operational amplifier U 1Positive input terminal 5, components for operational amplifier U 1Output terminal 8 passes through resistance R 9, R 10Meet polarity-inverting amplifier triode T respectively 1With triode T 2Base stage, T 1And T 2The diode D that emitter-base bandgap grading connects by forward respectively 1, D 2Meet triode T in parallel 3～T 13Triode T with parallel connection 14-T 24Base stage, D 1Negative pole and D 2Positive pole passes through resistance R respectively 11And R 12Meet polarity-inverting amplifier output terminal C, triode T 3-T 13With triode T 14-T 24Emitter-base bandgap grading and polarity-inverting amplifier output terminal C between equivalent resistance R is arranged respectively 13-R 34, polarity-inverting amplifier output terminal C is by the resistance R of series connection 35, R 36Meet transformer BY 1Elementary winding, elementary winding other end ground connection, elementary winding two ends are parallel with capacitor C 5, transformer BY 1Secondary winding is succeeded electrical equipment a-b box (6);
In order to finish the testing experiment of all kinds of high voltage electric equipments in the electric system, described program control testing device for electric equipment also is provided with dc resistance measurement circuit (13), dielectric loss slowdown monitoring circuit (8) leakage current and absorptance metering circuit (9);
Described dc resistance measurement circuit (13) comprising: one by amplifier module U 2, resistance R 37, R 38, R 40The proportional amplifier of forming and by amplifier module U 3, U 4, U 5, U 6, triode T 25, diode D 3, resistance R 41-R 53, the Voltage-to-frequency Converter of formation is in Voltage-to-frequency Converter, by amplifier module U 3, resistance R 41-R 43, capacitor C 6Form the standard integral circuit, by assembly U 6, capacitor C 7, resistance R 45Form voltage comparator, by triode T 25, assembly U 5, diode D 3, capacitor C 8, resistance R 46-R 50Form basic pulse generator, by assembly U 6, resistance R 52, R 51Form the integration commutation circuit; Equipment under test (17) one ends pass through resistance R 37Meet proportional amplifier assembly U 2Positive input terminal 3, the other end passes through resistance R 38Meet this assembly U 2Negative input end 2, proportional amplifier assembly U 2Output terminal passes through resistance R 41Meet the assembly U in the Voltage-to-frequency Converter 3Positive input terminal 13, Voltage-to-frequency Converter output connects controller (2) on the one hand, meets assembly U in the integration commutation circuit on the other hand 6Control end 11, the assembly U of integration commutation circuit 6Output terminal 13 meets standard integral circuit unit U 3Positive input terminal 13;
Described dielectric loss measurement circuit (8) comprising: (referring to Fig. 5), step-up transformer SYB, sampling divider resistance R 55, R 56, measure divider resistance R 57-R 62, double-pole change-over switch K 1, one by assembly U 7, resistance R 63-R 67, transformer BY 2The active electric current mutual inductor that constitutes; Output links to each other with electric current power amplifier (5) on step-up transformer SYB former limit, the marginal end ground connection of transformer SYB, and the other end also can be switched K switch by series connection 1K 1-1The resistance R that is divided into seven class 57-R 62With the assembly U in the active electric current mutual inductor 7Positive input terminal 3 and equipment under test (16) link to each other, assembly U 7Negative input end, at change-over switch K 1K 1-2Pass through resistance R when being in the 0-2 shelves 63Link to each other with ground, or at change-over switch K 1K 1-2Pass through resistance R when being in the 3-6 shelves 64Link to each other assembly U with ground 7Output and transformer BY 2Winding one end link to each other BY 2Elementary winding other end ground connection, BY 2Secondary winding one end links to each other with controller (2), and other end ground connection is parallel with the divider resistance R of series connection at step-up transformer SYB secondary winding two ends 55, R 56, R 55, R 56Mid point connect controller (2);
Described leakage current and absorptance circuit (9) comprise (referring to Fig. 6): by transformer BY 3, commutation diode D 4-D 7, capacitor C 9, C 10, resistance R 66The current rectifying and wave filtering circuit that is constituted is by amplifier module U 8And capacitor C 11, resistance R 67-R 72The standard multivibrator of being formed is by triode T 36, T 37, diode D 8, D 9, stabilivolt W 1, W 2, triode T 28, T 29The two-stage polarity-inverting amplifier of being formed, the multiplication of voltage case of a standard.Elementary up-flow power amplifier (5), the BY of connecing of transformer BY3 3Secondary winding neutral earthing, this secondary winding output termination D 4-D 7The bridge circuit input end of forming, the multivibrator output of standard is by assembly U 8Output terminal 8 passes through resistance R 73Meet triode T respectively 36With triode T 27Ground level, triode T 26Emitter-base bandgap grading is by forward diode in series D 8Stabilivolt W with differential concatenation 1Meet triode T 28And T 29Base stage, T 27Emitter-base bandgap grading is by the stabilivolt W of forward series connection 1With differential concatenation diode D 9Meet triode T 28And T 29Base stage, triode T 28, T 29Emitter access standard in parallel voltage multiplying rectifier case, the output of standard voltage multiplying rectifier case links to each other with equipment under test (16), equipment under test (16) links to each other with multiprogrammability instrument (controller) (2).
In this scheme, various supervisory routines, test procedure and relevant measurement data, all the form with command number is solidificated in the single board computer (21) and memory expansion module (22) EPROM that constitutes multiprogrammability instrument (2), as long as so utilize keypad on the single card microcomputer (21), just can use command number easily, make multiprogrammability instrument (2) produce the sinusoidal signal of corresponding amplitude and phase place according to the test request control sine wave signal generator (3) of equipment under test, through power amplifier that boosts (4) and up-flow power amplifier (5), supply with relay a-b box (6), simultaneously, relay a-b box (6) is finished different combinations according to the instruction of multiprogrammability instrument (2), experiment power supply is offered equipment under test, comprehensive interlock to various relay unit spare equipment or protective disc is tested, and the feedback signal of equipment under test is sent into multiprogrammability instrument (2) by sample circuit and analyzed by single card microcomputer and print the result by printer (7); The connector that perhaps will be used to measure the high-tension apparatus project inserts device respectively, on keypad, use command number, the sinusoidal signal that allows multiprogrammability instrument (2) control sine wave signal generator (3) produce correspondent frequency and phase place inserts corresponding metering circuit (8～13) respectively by up-flow power amplifier (5) and introduces on the corresponding high voltage electric equipment again, feedback signal on the high-voltage electrical equipment enters multiprogrammability instrument (2) through sample circuit and analyzes, and prints tabulation by printer (7).Output testing experiment result.
Facts have proved, compare with prior art by the program control testing device for electric equipment of the technical program made to have following advantage: (1) has solved the problem that aforementioned techniques can not carried out experiment with measuring to high voltage electric equipment; (2), because the sine-wave generator that is adopted can produce 100,150,200 ... the sinusoidal current of 700Hz and voltage also can carry out the harmonic protection test; (3), set high-power up-flow, booster circuit have adaptive faculty preferably to the impact of inductance capacitance load.(4), test findings is not subjected to the influence of electric current, voltage, waveform or frequency, has higher measuring accuracy.(5), utilize the various test procedures that are arranged in the multiprogrammability instrument (2), can realize automatic testing experiment, finish unit interlock test all kinds of standard relay protective discs to all kinds of electrical equipments.Utilize the computing machine (1) link to each other with multiprogrammability instrument (2) can also adopt interactive form easily, use the menu prompt method intuitively, input command number, the observation test result, the control printer is tabulated and is deposited, and carries out data file management.
So the technical program has reached the purpose of invention fully.
Now in conjunction with the accompanying drawings the course of work of the present invention and principle are described further:
Fig. 1 is a circuit block diagram of the present invention
Fig. 2 is multiprogrammability instrument (a 2) circuit structure diagram among Fig. 1.
Fig. 3 is power amplifier (5) circuit diagram that boosts of two identical up-flow power amplifiers (4) of structure among Fig. 1
Fig. 4 is the circuit diagram of dc resistance measurement circuit among Fig. 1 (13)
Fig. 5 is the circuit diagram of Fig. 1 medium loss measurement circuit (8),
Fig. 6 leaks among Fig. 1 and the circuit diagram of absorptance metering circuit (9)
Fig. 1 is described as follows:
(1) is computing machine among the figure, (2) be the multiprogrammability instrument, (3) be the sinusoidal signal generator of Frequency Adjustable amplitude modulation phase modulation, (4) be the power amplifier that boosts, (5) be the up-flow power amplifier, (6) be the relay a-b box, (7) be printer, (13) be dc resistance measurement circuit, (8) be the dielectric loss measurement circuit, (9) are leakage current and absorptance metering circuit, and (11) (12) (10) (14) are respectively the no-load voltage ratio metering circuit, branch wire time metering circuit and frequency analysis circuit, the withstand voltage test circuit is because their structures are very simple, so their the concrete circuit that do not draw, only in the single card microcomputer (21) of multiprogrammability instrument (2), corresponding process of measurement is set, can finishes its function.Now the course of work of the present invention is described in conjunction with Fig. 1 Fig. 2:
(1), when low voltage electrical equipment is carried out testing experiment, to be connected with relay a-b box (6) by working specification by side apparatus (15), select corresponding command number to give multiprogrammability instrument (2) according to the classification of equipment under test (15) then by computing machine (1) or directly command number is imported that multiprogrammability instrument (2) sends that up-flow boosts by artificial keypad by multiprogrammability instrument (2) and the phase shift order to sine wave signal generator (3), undertaken sending into relay a-b box (6) after the power amplification by up-flow amplifirer (4) or the amplifirer that boosts (5), relay a-b box (6) is given equipment under test (15) by the requirement of multiprogrammability instrument (2) with test current and trial voltage, actuating signal in the equipment under test (15), electric current, the sample circuit of voltage signal by multiprogrammability instrument (2) feeds back to the single card microcomputer (21) in the controller (2), print by single card microcomputer (21) control printer (7), show, perhaps giving computing machine (1) by multiprogrammability instrument (2) shows, print, data file management is carried out in the tabulation deposit.
(2), when carrying out the electrical parameters measure of high-voltage electrical equipment, earlier select corresponding metering circuit by tested object, connect the line between equipment under test and multiprogrammability instrument (2) and the high voltage electric equipment metering circuit, the same computing machine (1) that passes through is given multiprogrammability instrument (2) or is directly used artificial keypad by single card microcomputer (21), corresponding command number is sent into multiprogrammability instrument (2), give equipment under test (16) by corresponding high-voltage measuring circuit with test signal by the signal that experiment power supply produces, by side apparatus (16) feedback signal of output is sent into multiprogrammability instrument (2), directly control printing by multiprogrammability instrument (2), or give computing machine (1) and be presented on the screen, the tabulation deposit is printed in control, finishes data management work.
Now in conjunction with Fig. 1; Fig. 5 is with current relay; the test of the dielectric loss of unit interlock test of main transformer protection dish and high voltage electric equipment is an example, this device is described to the test of relay protection unit piece, the concrete principle of work of circuit when relay protection dish linkage test, the test of high pressure project.
Press the regulation of relay repair rules, tackle its action current when current relay is tested, return current, motion time measurement three times behind calculating drop-off to pick-up radio and the mean value, is used heavy current impact 3 times, measure action current again, calculate error percentage with average action current.When multiprogrammability instrument (2) receive by manually on single card microcomputer (21) keypad, import about the command number (or by the identical command number of computing machine (1) input) of carrying out current relay test the time, be that starting current relay test procedure auto-control relay a-b box (6) is connected corresponding contacts, automatically control sinusoidal signal generator (3) up-flow power amplifier (4) makes test current be strengthened gradually by little simultaneously, by the time current relay action, after measuring this current value, controlling test current again drops to current relay and returns, measure return current again, actuation time, calculate drop-off to pick-up radio, above process triplicate, after calculating mean value, control heavy current impact current relay three times of sinusoidal signal generator (3) and up-flow power amplifier (4) again, control rises electric current to current relay and moves again, the error percentage of current relay action current before and after calculate impacting is printed at last or is sent computing machine (1) to show, deposits disk or prints tabulation.
When carrying out the unit interlock test of standard main transformer protection dish; press preceding method input command number; start the main transformer protection dish unit interlock test program in the multiprogrammability instrument (2); pilot relay a-b box (6) is defeated by electric current each current start element respectively, measures the action current and the return current of each starting element.Measure dc bus starting element under the rated voltage situation then, intermediary element, the combined action time of time element, again DC bus-bar voltage is reduced to 70% of rated voltage, electric current rises to the starting element action, in the middle of judging, whether time and the action of outlet element be reliable, again DC bus-bar voltage is risen to 110% of rated voltage, electric current reduces to 0, judge intermediary element, whether time element and outlet element return reliable, repeat like this each current/voltage started loop test finish after, data are directly printed or are sent computing machine (1) demonstration on screen, print, tabulation, deposit.
When carrying out the dielectric loss measurement of high voltage electric equipment, dielectric loss measurement circuit (8) is connected in power amplifier (4) or (5) afterwards, still press the specific command number of preceding method input, start the dielectric loss measurement program in the multiprogrammability instrument (2), boost in boost amplifirer (4) or (5) of control, when voltage rises to ratings, provide the voltage and current in the testing apparatus (16) to give (2) by dielectric loss measurement circuit (8), (2) measure electric current in the measured equipment simultaneously, phase differential between the voltage and current voltage, after measurement finishes voltage is reduced to zero automatically and calculate electric capacity and dielectric loss value, print the result or be presented on the screen, print tabulation or deposit disk by computing machine (1).
The test job process fundamental sum said process of all the other all kinds of high-low-voltage electrical equipments is similar, no longer describes in detail.Computing machine among the figure (1) has been selected the IBMPC microsystem for use.
Fig. 2 is described as follows:
Fig. 2 is that Fig. 1 middle controller (2) also is the circuit diagram of multiprogrammability instrument,
(21) are the TP801B single board computer among the figure.(23) input switch, (24) sampling holder, the series connection of (25) analog to digital converter constitutes sample circuit the equipment under test feedback signal is sent into single board computer (21), and sampling holder (24) adopts CF398.Analog to digital converter (25) adopts 12 A/D converters of ADC1210, and (22) are memory expansion module among the figure, adopts 22732 and 6116 memories.(23) input switch is CD4051 eight mould switches.
Fig. 3 is described as follows:
C among the figure 1, R 1, R 2Form the decoupling filtering circuit, C 1Be capacitance, assembly U 1Be the XF801 operational amplifier, it and resistance R 3～R 8, capacitor C 2～C 4Form the standard operation amplifier, large power triode T 1～T 24, diode D 1, D 2Form polarity-inverting amplifier, R 35, R 36, C 5Be resistance capaciting absorpting circuit, BY 1Be output transformer.Resistance R 9R 10Be triode T 1, T 3Base resistance, R 11～R 34Be triode T 1～T 34Emitter resistance, diode D 1, D 2Be isolating diode.Its course of work: the signal that sine wave signal generator (3) takes place passes through capacitor C 1Enter U 1Amplify, again through resistance R 9, R 10Enter triode T respectively 1, T 2, and T 3～T 24The power amplifier level of forming is carried out power amplifier, again through R 35, R 36Enter output transformer BY 1, after send into relay a-b box (6) or high voltage electric equipment (8,9,10,11,12,13) power supply as testing experiment.Owing to adopted R 35, R 36, C 5The absorption circuit of forming adds triode T 1, T 3～T 13Adopt high-power NPN triode, triode T 2, T 24～T 34Adopt the PNP large power triode, this power amplifier is output as 500 watts, and its voltage is 0～220V, can bear big voltge surge and rush of current.
Fig. 4 is described as follows:
Assembly U among the figure 2, resistance R 37～R 40The proportion of composing amplifier.By assembly U 3, U 4, U 5, U 6, resistance R 41～R 53, capacitor C 6～C 8, triode T 25, diode D 3Form Voltage-to-frequency Converter, in this transducer, by assembly U 3, capacitor C 6, resistance R 41～R 43Form the standard integral circuit, by assembly U 4, capacitor C 7, resistance R 44, R 45, form voltage comparator, assembly U 5, triode T 25, diode D 3, resistance R 46～R 50, capacitor C 8Form basic pulse generator, assembly U 6, resistance R 51, R 52The integration commutation circuit of forming.After flowing into DC current in the tested device (17), produce DC voltage at (17) resistance two ends, this voltage is through U 2After amplifying, be defeated by U 3Carry out integration, U when integrator is output as zero volt 4Upset makes T 25And U 5The pulse that the standard arteries and veins generator of forming Deng element produces a normal width, this normal width pulse control U 5, make integrator carry out reverse integral to negative voltage, after full sized pules finishes, U 3Again to U 2Output voltage carry out forward and be integrated to zero point.Therefore, U 2The height of output voltage has just been determined the length of forward integral time.U like this 5The output pulse just be proportional to U 2Output voltage.Its output frequency is:
f＝（R 52+R 51）×U 82/R 41×S
In the formula: S is U 5The full sized pules width of output, U 82Be U 2Output voltage.
After multiprogrammability instrument (2) measures frequency, convert voltage to, and measure the DC current in (17), calculate direct current resistance numerical value at last through conversion, and the dc resistance when being scaled 75 ℃ automatically in accordance with regulations.(17) size of DC current is to be controlled automatically by multiprogrammability instrument (2) according to the size of measured resistance in, adopts the purpose of electric voltage frequency conversion, is to be convenient to make electric current and voltage measurement two loops to isolate.
Fig. 5 is described as follows:
SYB is a step-up transformer among the figure, R 55, R 56Be voltage measurement divider resistance, R 57～R 62Be the current measurement divider resistance, assembly U 7, resistance R 63-R 67With transformer BY 2Forming has power current transformer.R 63, R 64Be assembly U 7Negative input end resistance, R 65Be feedback resistance, K 2Be DC power supply switch.K 1Be change-over switch, it is with the resistance R of series connection 57～R 62Be divided into seven grades, R 63, R 64Be divided into two grades with the working current that active current transformer is provided as required and the test current of tested electrical equipment (16).Its course of work: the alternating voltage of the power amplifier that boosts (5) output 0～220V boosts to 0～10KV through SYB, and this voltage is through R 55, R 56Be defeated by the voltage measurement circuit of multiprogrammability instrument (2) after the dividing potential drop, by R 57-R 67, assembly U 7After electric current in the tested device (16) amplified, make size of current become the size of voltage, by BY 2Carry out being defeated by program control instrument (2) after the voltage isolation.Multiprogrammability instrument (2) is measuring voltage again, electric current and the phase differential between them, go out electric capacity, the dielectric loss tangent value trip temperature of going forward side by side according to these calculation of parameter and convert, be defeated by printer (7) or computing machine (1) at last and print tabulation or deposit, finish the management of profile.
This circuit adopts active electric current mutual inductor, is the phase angle error of mutual inductor when reducing little electric current.Improve measuring accuracy, also be provided with checking routine in the software, available standards electric capacity carries out verification to instrument during test.Precision is further enhanced.
When the big electric current of the breakdown generation of tested device (16), the multi-functional gift of money for a friend going on a journey (2) is reduced to voltage zero volt automatically; And provide alerting signal.
Fig. 6 is described as follows:
Transformer BY among the figure 3, diode D 4-D 7, capacitor C 9, C 10Resistance R 66Form bridge rectifier filter circuit.Assembly U 8, capacitor C 11, resistance R 67～R 72The multivibrator of composition standard, it can export the square wave of 4KHz, triode T 26, T 27, diode D 8, D 9Stabilivolt W 1, W 2And triode T 28, T 29Form the two-stage polarity-inverting amplifier, multiplication of voltage case (51) is a standard voltage multiplying rectifier case, and it can export the DC voltage of 0～60KV.The circuit working process:
0～220 volt of alternating voltage of the power amplifier (5) that boosts output behind step-down and rectifying and wave-filtering, is defeated by by U 8The multivibrator that the loop is formed produces the 4KHz square wave that 0-40 lies prostrate.Output is through T 36-T 38After carrying out power amplification, be defeated by multiplication of voltage case (51), the DC voltage that boosts to 0～60KV is given tested device (16), and electric current is defeated by multiprogrammability instrument (2) measurement in (16), and the divider resistance in the while multiplication of voltage case is exported to (2) and carried out voltage measurement.When the control boost in voltage to the specified trial voltage, the leakage current when measuring 15 seconds and 60 seconds in (16) calculates absorptance at last.Print tabulation or deposit then.Be provided with software protection in the process of boosting, when tested device when voltage breakdown produces big electric current, zero volt reduced to voltage automatically by multiprogrammability instrument (2), and provides alerting signal.
The present embodiment technical indicator
The project survey precision
Alternating current 0-30A≤± 0.5%
DC current 0-10A≤± 0.5%
Alternating voltage 0-250V≤± 0.5%
DC voltage 0-300V≤± 0.5%
Frequency measurement 0-100HZ≤± 0.5%
Phase measurement 0-360 °≤± 0.5%
Frequency analysis≤± 0.5%
Branch wire time 0-1S≤± 0.5%
Relay actuation time 0-10S≤± 0.5%
No-load voltage ratio test 0-100≤± 0.5%
Direct current resistance 0-5K Ω≤± 0.5%
Dielectric loss angle tg δ %≤3%≤| 0.3%|
Dielectric loss angle tg δ %＞3%≤± 5%

Claims (2)

1, a kind of program control testing device for electric equipment comprises: computing machine [1], controller [2], but can control the sinusoidal signal generator [3] of its generation amplitude modulation phase frequency modulation and the experiment power supply that power amplifier is formed by controller for one, experiment power supply is switched to the relay a-b box [6] of tested electrical equipment by controller [2] requirement, printer [7], power supply is characterized in that:
A. the controller of program control testing device for electric equipment [2] is by single board computer [21], memory expansion module [22] and be used for the feedback signal of tested electrical equipment is sent into of computing machine [21] by input switch [23], sampling holder [24], the multiprogrammability instrument that sample circuit constituted that analog to digital converter [25] is composed in series, its whole control programs, test routine are solidificated in single board computer [21] internal memory EPROM and the memory expansion module [22];
But b. be used for amplifying amplitude modulation in the experiment power supply of program control testing device for electric equipment, the power amplifier of the sine wave signal generator of phase modulation and frequency modulation [3] output signal is current power amplifier two parallel connections and that structure is identical [5] and voltage power amplifier [4], this amplifier [4,5] comprises one respectively by amplifier module U 1Resistance R 3-R 8, capacitor C 2-C 4The operational amplifier of being formed, one by one group of NPN high power valve T 1, T 3-T 13And one group of PNP large power triode T 2, T 14-T 24And resistance and R 9-R 34, diode D 1-D 2The polarity-inverting amplifier of forming, one by resistance R 35R 36Capacitor C 5The absorption circuit of forming, a transformer BY 1Its line construction is: but amplitude modulation phase modulation frequency modulation sinusoidal signal generator [3] is by capacitance C 1Meet components for operational amplifier U 1Positive input terminal 5, operational amplifier amplifier module U 1Output terminal 8 passes through resistance R 9, R 10Meet polarity-inverting amplifier triode T respectively 1With triode T 2Base stage, T 1-T 2The diode D that emitter-base bandgap grading connects by forward respectively 1, D 2Meet triode T in parallel 3～T 13Triode T with parallel connection 14-T 24Base stage, D 1Negative pole and D 2Positive pole passes through resistance R respectively 11And R 12Meet polarity-inverting amplifier output terminal C, triode T 3-T 13With triode T 14-T 24Emitter-base bandgap grading and polarity-inverting amplifier output terminal C between equivalent resistance R is arranged respectively 13-R 34, polarity-inverting amplifier output terminal C is by the resistance R of series connection 35, R 36Meet transformer BY 1Elementary winding, elementary winding other end ground connection, elementary winding two ends are parallel with capacitor C 5, transformer BY 1Secondary winding is succeeded electrical equipment a-b box [6];
C. in order to finish the testing experiment to all kinds of high voltage electric equipments in the electric system, described program control testing device for electric equipment also is provided with dc resistance measurement circuit [13], dielectric loss slowdown monitoring circuit [8], and leakage current and absorptance metering circuit [9]:
Dc resistance measurement circuit [13] comprises one by amplifier module U 2, resistance R 38, R 37, R 40The proportional amplifier of forming and by amplifier module U 3～U 6, triode T 25, diode D 3, resistance R 41-R 52The Voltage-to-frequency Converter that constitutes is in Voltage-to-frequency Converter, by amplifier module U 3, resistance R 41-R 43, capacitor C 6Form the standard integral circuit, by assembly U 4, capacitor C 7, resistance R 45Form voltage comparator, by triode T 25, assembly U 5, diode D 5, capacitor C 8, resistance R 46-R 50Form basic pulse generator, by assembly U 6, resistance R 51, R 52Form the integration commutation circuit; Equipment under test [17] one ends pass through R 37Meet proportional amplifier assembly U 2Positive input terminal 3, the other end passes through resistance R 38Meet this assembly U 2Negative input end 2, proportional amplifier assembly U 2Output terminal passes through resistance R 41Meet the assembly U in the Voltage-to-frequency Converter 3Positive input terminal 13, Voltage-to-frequency Converter output connects controller [2] on the one hand, meets assembly U in the integration commutation circuit on the other hand 6Control end 11, the assembly U of integration commutation circuit 6Output terminal 13 meets standard integral circuit unit U 3Positive input terminal 13;
Dielectric loss measurement circuit [8] is by step-up transformer SYB, and divider resistance R takes a sample 55, R 56, measure divider resistance R 57-R 62, double-pole change-over switch K 1, one by assembly U 7, resistance R 65-R 67, transformer BY 2The active electric current mutual inductor that constitutes is formed; Former limit of step-up transformer SYB and electric current power amplifier [5] output link, the marginal end ground connection of transformer SYB, and the other end can be switched K switch by being in series with 1K 1-1The resistance R that is divided into a joint class 57-R 62With the assembly U in the active electric current mutual inductor 7Positive input terminal 3 and equipment under test [16] link to each other, assembly U 7Negative input end is at change-over switch K 1K 1-2Pass through resistance R when being in the 0-2 shelves 63Link to each other with ground, or at change-over switch K 1K 1-2Pass through resistance R when being in the 3-6 shelves 64Link to each other assembly U with ground 7Output and transformer BY 2Elementary winding one end links to each other, BY 2Elementary winding other end ground connection, BY 2Secondary winding one end links to each other with controller [2], and other end ground connection is parallel with the divider resistance R of series connection at step-up transformer secondary winding two ends 55, R 56, R 55, R 56Mid point connect controller [2];
Leakage current and absorptance circuit [9] comprising: by transformer BY 3, commutation diode D 4-D 7, capacitor C 9, C 10, resistance R 66The current rectifying and wave filtering circuit that is constituted is by amplifier module U 8And capacitor C 11, resistance R 67-R 72The standard multivibrator of being formed is by triode T 26, T 27, diode D 8, D 9, stabilivolt W 1, W 2, triode T 28, T 29The two-stage polarity-inverting amplifier of being formed, the multiplication of voltage case of a standard; Transformer BY 3Elementary up-flow power amplifier [5], the BY of connecing 3Secondary winding neutral earthing, this secondary winding output termination D 4-D 7The bridge circuit input end of forming, assembly U in the multivibrator of standard 8Output terminal 8 passes through resistance R 73Meet triode T respectively 26With triode T 27Ground level, triode T 26Emitter-base bandgap grading is by forward diode in series D 8Stabilivolt W with differential concatenation 1Meet triode T 28And T 29Base stage, T 27Emitter-base bandgap grading is by the stabilivolt W of forward series connection 2With differential concatenation diode D 9Meet triode T 28And T 29Base stage, T 28, T 29Emitter-base bandgap grading access standard in parallel voltage multiplying rectifier case, the output of standard voltage multiplying rectifier case links to each other with equipment under test [16], and equipment under test [16] links to each other with multiprogrammability instrument [2].
2, by the described electrical equipment sequence test of claim 1 device, it is characterized in that described single board computer (21) is the TP801B single board computer, memory expansion module (22) is 2732 and 6116 storeies, input switch (23) is CD4051 eight mould switches, sampling holder (24) model is CF398, analog to digital converter (25) is 12 A/D converters of ADC1210, assembly U 1, U 2Be XF81C operational amplifier, U 3Be CM324 operational amplifier, U 7Be DA741 operational amplifier, U 4, U 5Be LM311 voltage comparator, U 6Be CD4051 eight mould switches.
CN 90108342 1990-10-10 1990-10-10 Program control testing device for electric equipment Expired - Fee Related CN1026161C (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 90108342 CN1026161C (en) 1990-10-10 1990-10-10 Program control testing device for electric equipment

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CN1060718A CN1060718A (en) 1992-04-29
CN1026161C true CN1026161C (en) 1994-10-05

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CN102636715B (en) * 2012-04-19 2013-07-24 湖北中试电力科技有限公司 Integrated electrical test comprehensive testing system
CN104408998B (en) * 2014-12-02 2017-05-10 国家电网公司 Electrical running simulation device of capacitive equipment
CN109856582A (en) * 2019-02-02 2019-06-07 中国人民解放军92493部队计量测试研究所 A kind of underwater kit detection device automatic calibrator
CN110350817B (en) * 2019-05-27 2020-08-14 广州供电局有限公司 Pulse generating circuit
CN112039323B (en) * 2020-07-13 2021-08-31 浙江华云信息科技有限公司 Three-phase program-controlled source based on D-type power amplifier
CN112557800A (en) * 2020-12-24 2021-03-26 上海新时达机器人有限公司 Factory-leaving electric testing device and testing method for robot

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