CN2441146Y - Dynamic electric characteristics testing device for high voltage switch operation mechanism - Google Patents

Abstract

The utility model relates to a dynamic electric-characteristic testing device for a high-voltage switch operation mechanism, which comprises a signal sampling circuit, an adjustment amplifying circuit, a multi-way switch, a central processor, a data memory, a program memory, a programmable parallel interface, a dial switch, printer-plotter, a key board display interface, a digital display, keys, etc. The signal sampling circuit is composed of a Hall element and a matching resistor. The utility model can do high-speed data acquisition for the voltage and the coil current of electrified moment of a switching-in coil and a switching-on coil of a high-voltage switch; thus, the basis can be provided to analyze the characteristics of the high-voltage switch and an operation power supply.

Description

A kind of high-voltage switch gear operating mechanism electrical characteristics dynamic checkout unit

The utility model relates to the electrical characteristics dynamic checkout unit of a kind of switchgear pick-up unit, particularly high-voltage switch gear operating mechanism.

High-voltage switch gear is a common equipment in the supply line, and the switch motion required drive of high-voltage switch gear is provided by external direct current power supply.In combined floodgate and sub-switching operation, the action of switch is very fast, generally finishes respectively at the hundreds of millisecond with within a few tens of milliseconds and closes a floodgate and the separating brake action.In work in the past, the direct supply that the high-voltage switch gear action is provided is not had special checkout equipment, can not write down high-voltage switch gear action transient operation power source voltage, current values and waveform.This just gives and analyzes switch working state, and the operating characteristic of operating power etc. is brought great inconvenience, causes difficulty for prevention and analysis culprit, and therefore developing high-voltage switch gear operating power checkout equipment is the problem that power department need solve.

The purpose of this utility model provides a kind of energy instant recording, detects high-voltage switch gear divide-shut brake coil current, the data of voltage and the proving installation of waveform.

The purpose of this utility model is realized by following technical scheme:

A kind of high-voltage switch gear operating mechanism electrical characteristics dynamic checkout unit, it comprises signal sampling circuit, adjust amplifying circuit, multi-way switch, central processing unit, data-carrier store, program storage, programmable parallel interface, toggle switch, printer-plotter, keyboard and display interface, the digital demonstration, parts such as button, wherein the output terminal of signal sampling circuit links to each other with the input end of adjusting amplifying circuit, adjust the output termination multi-way switch of amplification grade circuit, multi-way switch links to each other with central processing unit, central processing unit also respectively with data-carrier store, program storage, keyboard and display interface, programmable parallel interface links to each other.Described signal sampling circuit is made up of Hall element and build-out resistor, sample circuit component voltage sample circuit and current sampling circuit, they adopt Hall voltage sensor and Hall current sensor respectively, 1,2 pin of sensor input end connect voltage or the current signal that external circuit takes out respectively, 3,5 pin of its output terminal connect positive and negative working power respectively, and 4 pin of output terminal connect the build-out resistor of resistance-capacitance circuit.

Above-mentioned electrical characteristics dynamic checkout unit, described adjustment amplifying circuit amplify two parts by voltage signal adjustment amplification and current signal adjustment to be formed, and every part all comprises a follower and a two-stage amplifier, and forms by chip TL084 and peripheral resistance; Adjust 1 of TL084 chip in the amplifying circuit at voltage signal, 2,3 pin are respectively the output terminals of follower U4A, negative input end and positive input terminal, the positive input terminal of follower U4A is connected with the voltage sampling input signal, output terminal is connected with the negative input end of this follower, 5 of this TL084 chip, 6,7 and 8,9,10 pin are formed two-stage amplifier U4B respectively, U4C, 5 pin are earth terminals of U4B, 6 pin are negative input ends of U4B, it links to each other with the output terminal of above-mentioned follower U4A, 7 pin are output terminals of U4B, it is connected with the input end of the amplifier U4C of subordinate, the input end of U4C, earth terminal, output terminal is respectively 9 of a chip, 10,8 pin; Adjust in the amplifying circuit at current signal, 5 of TL084 chip, 6,7 pin are respectively the positive input terminals of follower U2B, negative input end and output terminal, their connected mode is identical with the follower connected mode that voltage signal is adjusted amplifying circuit, 10 of this chip, 9,8 pin and 12,13,14 pin are formed two-stage amplifier U2C respectively, U2D, 10 pin are earth terminals of U2C, 9 pin are negative input ends of U2C, it links to each other with the output terminal of above-mentioned follower U2B, 8 pin are output terminals of U2C, it is connected with the input end of the amplifier U2D of subordinate, the input end of U2D, earth terminal, output terminal is respectively 13 of a chip, 12,14 pin.

Above-mentioned electrical characteristics dynamic checkout unit; described voltage signal adjustment amplification and current signal also are connected to a signal embedding voltage protection circuit after adjusting amplifying circuit; it is made up of resistance R 8, capacitor C 2 and two diode D1, D2; the output terminal of resistance one termination amplifier U4C, another termination capacitor C 2, latter's other end ground connection; the high termination output signal end of diode D1; low termination normal voltage, the low termination output signal end of diode D2, high-end ground connection.

Also be provided with a standard signal circuit in the above-mentioned adjustment amplifying circuit, it is by voltage stabilizing chip MC1405, follower U2A, resistance R W3, compositions such as RW4,2 pin of chip MC1405 connect+the 15V normal voltage, 5 pin and 6 pin connecting resistance RW4, the other end ground connection of RW4,6 pin of MC1405 also link to each other with the end of RW3, described follower U2A is by 1 of chip TL084,2,3 pin are formed, 1 pin is an output terminal, and 2 pin are negative input end, and it is connected with 1 pin, and by capacitor C 5 ground connection, 3 pin are positive input terminals, and it links to each other by resistance R W3 with 6 pin of MC1405,4 pin of TL084 and 11 pin be respectively this follower just, the input end of negative normal voltage.

Adopt the high-voltage switch gear operating mechanism electrical characteristics dynamic checkout unit of said structure can be under the support of custom-designed software to minute, voltage and the coil current of closing coil during charged moment carry out high-speed data acquisition, voltage, current curve and the data of each operation can be printed at once, analyze reference for operating personnel, the curve of describing is clear, accurate, voltage, current curve are painted on the same coordinate with different colors, and the characteristic of analyzing high-voltage switch gear and operating power for the staff provides great convenience.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is the utility model theory diagram;

Fig. 2 is the utility model electrical schematic diagram;

Fig. 3 is the utility model voltage signal sampling circuit and adjusts the amplifying circuit schematic diagram;

Fig. 4 is the utility model current signal sampling circuit and adjusts the amplifying circuit schematic diagram;

Fig. 5 is standard signal circuit theory diagrams of the present utility model;

Fig. 6 is a main program flow block diagram of the present utility model.

The utility model is provided with parts such as signal sampling circuit 1, adjustment amplifying circuit 2, multi-way switch 3, central processing unit 4, data-carrier store 5, program storage 6, programmable parallel interface 7, toggle switch 8, printer-plotter 9, keyboard and display interface 10, digital demonstration 11, button 12.

Signal sampling circuit 1 is made up of Hall element and build-out resistor, it is made up of voltage sample circuit 13 and current sampling circuit 14, adopt LV25-P type Hall voltage sensor and LT200-S type Hall current sensor respectively, 1,2 pin that Fig. 3 and Fig. 4 demonstrate their input end respectively connect voltage, the current signal that external circuit takes out respectively, 3,5 pin of their output terminal connect the working power of positive and negative 15V respectively, and 4 pin of output terminal connect build-out resistor.In Fig. 3, when former limit input voltage was 300V, build-out resistor RV1+RV2+RV3 was 30K Ω, and electric current is 10mA, and outgoing side build-out resistor R2 is 200 Ω, and electric current is 25mA, and output voltage is 10V.In Fig. 4, when the electric current that flows through when former limit was 200A, the build-out resistor R9 of outgoing side was 100 Ω, and output current is 100mA, and output voltage is 10V.RW2 is that voltage is adjusted potentiometer among RW1 among Fig. 3 and Fig. 4.Adjusting amplifying circuit 2 has voltage signal adjustment amplification 15 and current signal adjustment to amplify 16 two parts, and Fig. 3 demonstrates the voltage signal adjustment and amplifies 15, and Fig. 4 demonstrates the current signal adjustment and amplifies 16.Adjust 1 of TL084 chip in the amplifying circuit at voltage signal, 2,3 pin are output terminals of follower U4A, negative input end and positive input terminal, the positive input terminal of follower U4A is connected with the voltage sampling input signal, output terminal is connected with the negative input end of this follower, 5 of this TL084 chip, 6,7 and 8,9,10 pin are formed two-stage amplifier U4B respectively, U4C, 5 pin are earth terminals of U4B, 6 pin are negative input ends of U4B, it links to each other with the output terminal of above-mentioned follower U4A, 7 pin are output terminals of U4B, it is connected with the input end of the amplifier U4C of subordinate, the input end of U4C, earth terminal, output terminal is respectively 9 of a chip, 10,8 pin; Adjust in the amplifying circuit at current signal, 5 of TL084 chip, 6,7 pin are positive input terminals of follower U2B, negative input end and output terminal, their connected mode is identical with the follower connected mode that voltage signal is adjusted amplifying circuit, 10 of this chip, 9,8 pin and 12,13,14 pin are formed two-stage amplifier U2C respectively, U2D, 10 pin are earth terminals of U2C, 9 pin are negative input ends of U2C, it links to each other with the output terminal of above-mentioned follower U2B, 8 pin are output terminals of U2C, it is connected with the input end of the amplifier U2D of subordinate, the input end of U2D, earth terminal, output terminal is respectively 13 of a chip, 12,14 pin.

Foregoing circuit is adjusted signal, the positive and negative 10V signal of Hall element output is become-signal of 2.5V～2.5V, by being converted to the standard signal of 0～5V with the standard signal superposition.

The voltage signal adjustment amplification 15 of above-mentioned adjustment amplifying circuit 2 and current signal adjustment also are connected to a signal embedding voltage protection circuit 17 respectively after amplifying 16 parts; it is made up of resistance, electric capacity and two diodes; resistance is connected across between terminal amplifier and the output signal; output signal one side of electric capacity one terminating resistor; other end ground connection, the high termination output signal end of a diode, low termination normal voltage; the low termination output signal end of another diode, high-end ground connection.The purpose of this circuit be voltage limit between-0.3～5.3V, the inner A/D converter of protection central processing unit is avoided overrange and is damaged.Resistance R 8, R15 play metering function in this circuit, and capacitor C 2, C4 play smoothing effect, and diode D1, D2 and D3, D4 play the pressure limiting effect.

Fig. 5 is the standard signal circuit of adjusting in the amplifying circuit 2 18, be by voltage stabilizing chip MC1405, follower U2A, resistance R W3, compositions such as RW4,2 pin of chip MC1405 are pressed+the 15V normal voltage, 5 pin and 6 pin connecting resistance RW4, the other end ground connection of RW4,6 pin of MC1405 also link to each other with the end of RW3, described follower U2A is by 1 of chip TL084,2,3 pin are formed, 1 pin is an output terminal, and 2 pin are negative input end, and it is connected with 1 pin, and by capacitor C 5 ground connection, 3 pin are positive input terminals, and it links to each other by resistance R W3 with 6 pin of MC1405,4 pin of TL084 and 11 pin be respectively this follower just, the input end of negative normal voltage.This circuit provides+5V and+the canonical reference voltage of 2.5V, be not subjected to the influence of external voltage change, to guarantee the precision of A/D converter sampled value.

Multi-way switch 3 connects the signal output part of adjusting amplifying circuit 2 by 1,7,8,14 pin that chip MC1405 forms it, and 4,12 pin connect 42,43 pin of central processing unit 8098 chips.Multi-way switch will be controlled two-way in four road input signals and enter central processing unit and carry out the A/D conversion.

Central processing unit 4 is made up of 8098 chips, and its output terminal is connected to data-carrier store 5, program storage 6, programmable parallel interface 7, keyboard and display interface 10.

Data-carrier store 5 is 6264 chips, be used for sampling in the memory storage operational process and handle after data, access at any time.Program storage 6 is 2764 chips, is used for storing shifting to an earlier date compiled program, can not change at the device run duration.Two kinds of chips are connected with CPU with address bus by data bus.

Programmable parallel interface 7 is 8255 chips, and it links to each other with plotting apparatus 9 toggle switch 8 with CPU.

Keyboard and display interface is 8279 chips, and it is connected six digital demonstrations 11 of display device duty, four buttons 12 of operating personnel's issue an order with CPU.

Master routine of the present utility model is said as follows:

A. initialization: 8098 the allocation plan and the initialization of interface chip 8279 and 8255 are set.

B. open interruption: interrupt mode and open corresponding the interruption are set.

C. show: from the display unit peek and send digital piece 8279 to show.

D. test zone bit: the jump location of determining program by zone bit.

E. touch number conversion: the voltage and current passage is sampled respectively, touch number conversion, deposit data is in RAM.

F. data processing: the data of gathering are adjusted calculating.

G. print: print branch, combined floodgate coordinate, print curve, print the number symbol.

Claims (4)

1, a kind of high-voltage switch gear operating mechanism electrical characteristics dynamic checkout unit, it is characterized in that: it comprises signal sampling circuit (1), adjust amplifying circuit (2), multi-way switch (3), central processing unit (4), data-carrier store (5), program storage (6), programmable parallel interface (7), toggle switch (8), printer-plotter (9), keyboard and display interface (10), digital show (11), button (12), wherein, the output terminal of signal sampling circuit (1) links to each other with the input end of adjusting amplifying circuit (2), adjust the output termination multi-way switch (3) of amplifying circuit (2), multi-way switch (3) links to each other with central processing unit (4), central processing unit (4) also respectively with data-carrier store (5), program storage (6), keyboard and display interface (10), and programmable parallel interface (7) links to each other; Described signal sampling circuit (1) is made up of Hall element and resistance-capacitance circuit, sample circuit (1) component voltage sample circuit (13) and current sampling circuit (14), they adopt Hall voltage sensor and Hall current sensor respectively, 1,2 pin of sensor input end connect voltage or the current signal that external circuit takes out respectively, 3,5 pin of its output terminal connect positive and negative working power respectively, and 4 pin of output terminal connect the build-out resistor of resistance-capacitance circuit.

2, proving installation according to claim 1, it is characterized in that: described adjustment amplifying circuit (2) comprises that voltage signal is adjusted amplifying circuit (15) and current signal is adjusted amplifying circuit (16) two parts, every part all comprises a follower and a two-stage amplifier, and forms by chip TL084 and peripheral resistance; Adjust in the amplifying circuit (15) at voltage signal, 1 of TL084 chip, 2,3 pin are respectively the output terminals of follower U4A, negative input end and positive input terminal, the positive input terminal of follower U4A is connected with the voltage sampling input signal, output terminal is connected with the negative input end of this follower, 5 of this TL084 chip, 6,7 and 8,9,10 pin are formed two-stage amplifier U4B respectively, U4C, 5 pin are earth terminals of U4B, 6 pin are negative input ends of U4B, it links to each other with the output terminal of above-mentioned follower U4A, 7 pin are output terminals of U4B, it is connected with the input end of the amplifier U4C of subordinate, the input end of U4C, earth terminal, output terminal is respectively 9 of a chip, 10,8 pin; Adjust in the amplifying circuit (16) at current signal, 5 of TL084 chip, 6,7 pin are respectively the positive input terminals of follower U2B, negative input end and output terminal, their connected mode is identical with the follower connected mode that voltage signal is adjusted amplifying circuit, 10 of this chip, 9,8 pin and 12,13,14 pin are formed two-stage amplifier U2C respectively, U2D, 10 pin are earth terminals of U2C, 9 pin are negative input ends of U2C, it links to each other with the output terminal of above-mentioned follower U2B, 8 pin are output terminals of U2C, it is connected with the input end of the amplifier U2D of subordinate, the input end of U2D, earth terminal, output terminal is respectively 13 of a chip, 12,14 pin.

3, proving installation according to claim 2; it is characterized in that: the voltage signal adjustment amplification of described adjustment amplifying circuit (2) and current signal also are connected to a signal embedding voltage protection circuit (17) after adjusting amplifying circuit; it is made up of resistance R 8, capacitor C 2 and two diode D1, D2; the output terminal of resistance one termination amplifier U4C; another termination capacitor C 2; latter's other end ground connection; the high termination output signal end of diode D1; low termination normal voltage; the low termination output signal end of diode D2, high-end ground connection.

4, proving installation according to claim 3, it is characterized in that: also be provided with a standard signal circuit (18) in the described adjustment amplifying circuit (2), it is by voltage stabilizing chip MC1405, follower U2A, resistance R W3, compositions such as RW4,2 pin of chip MC1405 connect+the 15V normal voltage, 5 pin and 6 pin connecting resistance RW4, the other end ground connection of RW4,6 pin of MC1405 also link to each other with the end of RW3, described follower U2A is by 1 of chip TL084,2,3 pin are formed, 1 pin is an output terminal, 2 pin are negative input end, it is connected with 1 pin, and by capacitor C 5 ground connection, 3 pin are positive input terminals, it links to each other by resistance R W3 with 6 pin of MC1405,4 pin of TL084 and 11 pin be respectively this follower just, the input end of negative normal voltage.

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