CN208043901U - A kind of novel ac high-voltage busbar detection circuit - Google Patents
A kind of novel ac high-voltage busbar detection circuit Download PDFInfo
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- CN208043901U CN208043901U CN201721458367.3U CN201721458367U CN208043901U CN 208043901 U CN208043901 U CN 208043901U CN 201721458367 U CN201721458367 U CN 201721458367U CN 208043901 U CN208043901 U CN 208043901U
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Abstract
The utility model provides a kind of simple in structure, detection is safe and reliable, precision is higher, low-cost novel ac high-voltage busbar detection circuit, the decompression that its feature passes through high voltage bus voltage, rectification, filtering and serial voltage regulation circuit and light current and composition Differential Input detection bus circuit, include rectification of the diode rectifier circuit to the alternating voltage after decompression afterwards by preposition, it is small that a ripple is exported by π type RC filter circuits and serial voltage regulation circuit, input terminal of the direct current signal of voltage stabilization to optical coupling isolation circuit, then it is calculated for output after conditioned circuit improves the signal from optical coupling isolation circuit.This measurement circuit design is reasonable, has good stable state, and security performance detects rectification, the performance of Voltage stabilizing module in real time, it can be achieved that detection to high voltage bus.
Description
Technical field
The utility model is related to the detection circuits of high voltage bus voltage
Background technology
With the quickening of China's power grid construction paces, the whole nation existing 110 kilovolts and more than 24.4 ten thousand kilometers of the above power transmission line become
Nearly 2.9 hundred million kilovolt-amperes of electric equipment, wherein 10821 kilometers of 500 KV line, 37,800,000 kilovolt-amperes of transformer equipment, 330 KV line
4936 kilometers, 7,800,000 kilovolt-amperes of transformer equipment, 220 kilovolts of more than 9.1 ten thousand kilometers of roads, nearly 1.6 hundred million kilovolt-amperes of transformer equipment, therefore
High pressure detection technique development also constantly innovation, but most of detection techniques are the disadvantage is that circuit is complicated, inconvenient for use.
Invention content
It is an object of the invention to overcome the deficiencies in the prior art, propose that one kind is simple in structure, detection is safe and reliable, precision
It is higher, low-cost true reduction busbar voltage detection circuit.
1. its feature by the voltage stabilizing of the decompression of high voltage bus voltage, rectification, filtering and serial voltage regulation circuit with it is weak
Electricity simultaneously forms Differential Input detection bus circuit, including by diode rectifier circuit after preposition to coming from alternating voltage after decompression
Rectification, export that a ripple is small, direct current signal of voltage stabilization to light by π type RC filter circuits and serial voltage regulation circuit
The input terminal of coupling isolation circuit is counted after then conditioned circuit improves the signal from optical coupling isolation circuit for output
It calculates.
2. high voltage bus detection circuit, including diode rectifier circuit, π type filter circuits, Current amplifier type series voltage stabilizing
Circuit and linear optical coupling opto isolation circuits, the modulate circuit of this detection circuit include the difference for being connected on isolation circuit output end
The protection circuit of point amplifying circuit, filter circuit C1, C2 and differential amplifier circuit include diode D1, D2 and resistance R7,
R8。
The advantages and positive effects of the present invention are：
1, the voltage exported from diode rectifier circuit after high voltage bus decompression by the filtering of C1 by most of exchange
Ingredient filters out, and is further filtered by the R1 and C2 filter circuits constituted, and the DC voltage of defeated pulsation very little passes through series connection
The voltage stabilizing of type regulator circuit exports burning voltage signal, this circuit structure is simple, and protection is perfect, and cost is relatively low to be can be achieved with preferably
Effect.
2, this detection circuit uses optocoupler opto devices as isolation circuit, can realize effective isolation electrically, energy
Signal is transmitted in the form of light, has preferable anti-jamming effectiveness, capacitance C1 and C2 further to filter circuit, diode D1 and D2
The clamped input voltage range in amplifier, the anti-interference function of resistance R8 and the current-limiting resistance of resistance R7 amplifiers prevent from exporting
Overheat short circuit damages amplifier chip, to realize the safety and reliability of detection circuit.
Description of the drawings
The current rectifying and wave filtering circuit figure of Fig. 1 high voltage bus；
Fig. 2 is voltage detecting circuit figure.
Specific implementation mode
The utility model embodiment is further described below in conjunction with attached drawing：
1, one high voltage bus voltage of figure reaches the rectification circuit of diode through being depressured the decompression of mutual inductor, according to diode
One-way conduction characteristic realizes that the rectification to alternating voltage, the course of work are, when U2 voltages are timing, electric current institute is D1 through circuit
→ load → D4；Electric current institute is D2 → load → D3 through circuit when U2 voltages are negative, and capacitor C, which has, opens a way to direct current, to handing over
The electric current of the small characteristic of flow impedance, rectification circuit output filters out most of alternating component by the filtering of C1, through R1 and C2 structures
At filter circuit further filter so that alternating component further decreases, then through voltage stabilizing circuit module export a ripple
Small, voltage stabilization direct current signal is to the input terminal of optical coupling isolation circuit, and voltage stabilizing circuit module is using with amplifying ring
The serial voltage regulation circuit of section, transistor act as adjustment pipe this, cause load voltage Uo to change regardless of reason, all
Uo will be made to stablize by the adjusting of Uce, the anti-phase input that R3, R4, R5 are connected on integrated transporting discharging for the sampling resistor of output voltage is negative
End, the potentiometric response of the certain point over the ground variation of output voltage in resistance, when load variation makes voltage Uo increase, sampling electricity
The voltage of resistance over the ground increases, and the base stage for adjusting pipe generates opposite variation, to which the variation that emitter following base stage makes Uo protect
It is fixed to keep steady.
2, voltage realizes effective isolation electrically by optocoupler opto isolation circuits, and signal, electricity are transmitted in the form of light
Hold C1 and C2 further to filter to coming from isolation signals, the signal from optical coupling isolation circuit is improved through operational amplifier circuit
It is calculated afterwards for output, realizes the purpose of simply and effectively detection high tension voltage.
Claims (4)
1. a kind of novel ac high-voltage busbar detection circuit, it is characterized in that including reduction voltage circuit, current rectifying and wave filtering circuit, voltage stabilizing electricity
Road, photoelectric coupling circuit and difference amplifier detection circuit：The reduction voltage circuit is used to carry out pressure drop, rectification to high voltage bus voltage
Filter circuit is used to carry out rectifying and wave-filtering processing to the alternating current after decompression, and regulator circuit is used for the direct current after rectifying and wave-filtering
Carry out the detection that voltage-stabilizing protection is convenient for detection circuit；The photoelectric coupling circuit is for being effectively isolated electrically, difference amplifier
Detection circuit is for realizing voltage detecting.
2. a kind of novel ac high-voltage busbar detection circuit according to claim 1, it is characterized in that the rectifying and wave-filtering is electric
Road uses diode bridge rectification, and filtering is using the RC filtering of π types.
3. a kind of novel ac high-voltage busbar detection circuit according to claim 1, it is characterized in that the regulator circuit is set
The serial regulating circuit with Current amplifier effect is counted into, resistance R3, R4, R5 are the sampling resistor of output voltage, are connected on integrated
The anti-phase input negative terminal of amplifier, transistor are that adjustment is managed, and so that voltage Uo is increased when load changes, the voltage liter of sampling resistor over the ground
Height, the base stage for adjusting pipe generate opposite variation, to which the variation that emitter following base stage makes Uo keep stablizing.
4. a kind of novel ac high-voltage busbar detection circuit as described in claim 1, it is characterized in that the difference amplifier detects
The clamped input voltage ranges in amplifier of circuit diode D1 and D2, capacitance C1 and C2 are further filtered circuit realization,
Resistance R8 improves the anti-interference function of circuit, and current-limiting resistance R7 can prevent output short-circuit from crossing cause thermal damage amplifier chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721458367.3U CN208043901U (en) | 2017-11-01 | 2017-11-01 | A kind of novel ac high-voltage busbar detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721458367.3U CN208043901U (en) | 2017-11-01 | 2017-11-01 | A kind of novel ac high-voltage busbar detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208043901U true CN208043901U (en) | 2018-11-02 |
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ID=63957747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721458367.3U Active CN208043901U (en) | 2017-11-01 | 2017-11-01 | A kind of novel ac high-voltage busbar detection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208043901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129741A (en) * | 2023-10-27 | 2023-11-28 | 石家庄科林电气股份有限公司 | Method for collecting voltage to ground of bus of direct current system and electronic equipment |
-
2017
- 2017-11-01 CN CN201721458367.3U patent/CN208043901U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129741A (en) * | 2023-10-27 | 2023-11-28 | 石家庄科林电气股份有限公司 | Method for collecting voltage to ground of bus of direct current system and electronic equipment |
| CN117129741B (en) * | 2023-10-27 | 2024-01-02 | 石家庄科林电气股份有限公司 | Method for collecting voltage to ground of bus of direct current system and electronic equipment |
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