CN207281165U - A kind of induced voltage detection device and its control system - Google Patents
A kind of induced voltage detection device and its control system Download PDFInfo
- Publication number
- CN207281165U CN207281165U CN201721198725.1U CN201721198725U CN207281165U CN 207281165 U CN207281165 U CN 207281165U CN 201721198725 U CN201721198725 U CN 201721198725U CN 207281165 U CN207281165 U CN 207281165U
- Authority
- CN
- China
- Prior art keywords
- capacitance
- induced voltage
- signal cable
- build
- oscillograph
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of induced voltage detection device, it is characterised in that the peripheral circuit being connected including capacitive divider and with the capacitive divider, the capacitive divider include the first capacitance C0 and the second capacitance C1；The peripheral circuit includes signal cable wave impedance Z, build-out resistor R；First capacitance C0 and the second capacitance C1 series connection, first capacitance C0 and the second capacitance C1 common ports are connected with a pin of the input terminal of signal cable wave impedance Z, another pin of the input terminal of signal cable wave impedance Z is connected with the other end of the second capacitance C1 of electricity, one pin of signal cable wave impedance Z output terminals is connected with one end of build-out resistor R, another pin of signal cable wave impedance Z output terminals is connected with the other end of build-out resistor R.In addition, the invention also discloses a kind of induced voltage control system.Using the utility model, the measurement accuracy of voltage is improved, improves security performance.
Description
Technical field
It the utility model is related to induced voltage technical field, more particularly to a kind of induced voltage detection device and its control system
System.
Background technology
Electromagnetic environment residing for substation is power frequency electromagnetic field, is a kind of quasi-static field.The metallic conductor being in the electric field
By capacitive coupling or electromagnetic coupled so that its above earth potential, that is, show electrostatic induction voltage, electromagnetic induction electricity over the ground
Press and to earth-current.By taking same tower double back transmission line parameter testing as an example, single time have a power failure when circuit on induced voltage it is up to several
Thousand or even tens kilovolts.
Voltage may be up to several kilovolts, and progress line parameter circuit value experiment under the conditions of this, faradic presence can not only influence to test
The accuracy of data, and testing equipment may be caused to damage, or even threaten the life security of testing crew.From power train
Safety message material of uniting understands have the case that induced electricity causes casualties.
At present, induced voltage control system, after generally use induced voltage detection device measures, staff according to
The result of detection judge whether the situation of danger, is not the deterministic process of automation, be need personnel to it is live into
What row judged, therefore very big injury can be caused to the personal safety of personnel.
Utility model content
The purpose of this utility model provides a kind of induced voltage detection device and its control system, improves security performance.
Existing in the prior art to solve the problems, such as, the utility model provides a kind of induced voltage detection device, the device bag
Include capacitive divider and the peripheral circuit being connected with the capacitive divider, the capacitive divider includes the first capacitance C0 and the
Two capacitance C1；The peripheral circuit includes signal cable wave impedance Z, build-out resistor R；
First capacitance C0 and the second capacitance C1 series connection, the first capacitance C0 and the second capacitance C1 common ports and signal cable wave resistance
The pin connection of the input terminal of anti-Z, another pin of the input terminal of signal cable wave impedance Z is with the second capacitance C1's of electricity
The other end connects, and a pin of signal cable wave impedance Z output terminals is connected with one end of build-out resistor R, signal cable wave resistance
Another pin of anti-Z output terminals is connected with the other end of build-out resistor R.
Preferably, further include oscillograph input resistance R2, oscillograph input capacitance C2, the oscillograph input resistance R2 and
Input capacitance C2 is connected in parallel on the both ends of build-out resistor R respectively.
Preferably, compensation resistance R1, the compensation resistance R1 are further included and is series at build-out resistor R and oscillograph input capacitance
Between C2.
Corresponding the utility model also provides a kind of induced voltage control system, which includes induced voltage detection dress
Put, the oscillograph being connected with induced voltage detection device, the induced voltage detection device include capacitive divider and with it is described
The peripheral circuit of capacitive divider connection, the capacitive divider include the first capacitance C0 and the second capacitance C1；The periphery electricity
Road includes signal cable wave impedance Z, build-out resistor R；
First capacitance C0 and the second capacitance C1 series connection, the first capacitance C0 and the second capacitance C1 common ports and signal cable wave resistance
The pin connection of the input terminal of anti-Z, another pin of the input terminal of signal cable wave impedance Z is with the second capacitance C1's of electricity
The other end connects, and a pin of signal cable wave impedance Z output terminals is connected with one end of build-out resistor R, signal cable wave resistance
Another pin of anti-Z output terminals is connected with the other end of build-out resistor R.
Preferably, the induced voltage detection device further includes oscillograph input resistance R2 and oscillograph input capacitance C2,
The oscillograph input resistance R2 and input capacitance C2 are connected in parallel on the both ends of build-out resistor R respectively.
Preferably, the induced voltage detection device further includes compensation resistance R1, the compensation resistance R1 and is series at matching
Between resistance R and oscillograph input capacitance C2.
Preferably, induced voltage cancellation element is further included, one end of the induced voltage cancellation element is connected with oscillograph,
The other end of the induced voltage cancellation element and connection to be measured.
Preferably, the oscillograph includes receiving unit, transmitting element, microprocessor and A/D converter, waveform display list
Member, the input terminal of the receiving unit are connected with the output terminal of induced voltage detection device, an output of the receiving unit
End is connected with waveform display unit, the input terminal connection of another output terminal and A/D converter of the receiving unit, the A/D
The output terminal of converter and the input terminal of microprocessor connect, and the output terminal of microprocessor is connected with transmitting element.
The induced voltage detection device of the utility model is provided with capacitive divider, and passes through peripheral circuit all parts
Set, improve the accuracy of detection of induced voltage, improve security.
Brief description of the drawings
Fig. 1 is a kind of a kind of schematic diagram of embodiment of induced voltage control system of the utility model；
Fig. 2 is a kind of circuit theory schematic diagram of induced voltage detection device of the utility model；
Fig. 3, Fig. 4 are a kind of circuit theory equivalent schematics of induced voltage detection device of the utility model；
Fig. 5 is a kind of detection result emulation schematic diagram of induced voltage detection device of the utility model；
Fig. 6 is a kind of embodiment schematic diagram of oscillograph in a kind of induced voltage control system of the utility model.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, which is a kind of schematic diagram of induced voltage control system of the utility model, which includes：Sensing
Voltage check device 1, oscillograph 2, induced voltage cancellation element 3；One end of induced voltage detection device 1 connects with circuit to be measured
Connect, the other end of induced voltage detection device 1 is connected with one end of oscillograph 2, and the other end and the induced voltage of oscillograph 2 eliminate
One end connection of device 3, the other end of induced voltage cancellation element and connection to be measured.Therefore, voltage detecting can be passed through
Device 1 detects the induced voltage of circuit to be measured, then by oscillograph 2 carry out oscillography show, and by with connection to be measured
Induced voltage cancellation element eliminate induced voltage in circuit to be measured, it is achieved thereby that the induced electricity of detection building-site automatically
Pressure, and induced voltage caused by adjust automatically, improve the security of building-site.
As shown in Fig. 2, induced voltage detection device 1, including the capacitance partial pressure 11 that is connected with circuit to be measured and with capacitance point
The output terminal of depressor 11 is connected with peripheral circuit 12.Wherein capacitive divider 11 includes：First capacitance C0 and the second capacitance C1；Outside
Enclosing circuit 12 includes signal cable wave impedance Z, build-out resistor R；First capacitance C0 and the second capacitance C1 series connection, the first capacitance C0 and
Second capacitance C1 common ports are connected with a pin of the input terminal of signal cable wave impedance Z, the input of signal cable wave impedance Z
End another pin be connected with the other end of the second capacitance C1 of electricity, a pin of signal cable wave impedance Z output terminals and
One end connection with resistance R, another pin of signal cable wave impedance Z output terminals are connected with the other end of build-out resistor R.
Wherein, C0, C1 are respectively high pressure, low-voltage arm capacitance；Z is the wave impedance of signal cable；R is end matching electricity
Resistance, value is 50 Europe；R1 and C2 is respectively integrating resistor, capacitance；R2 and C is input resistance, the capacitance of oscillograph.Oscillograph
For input resistance R2 much larger than compensation resistance R1, then the output y (t) of C1 is R, then has
As (C0+C1) dy (t)/dt ＞ ＞ y (t)/R when,
That is u (t)=((C0+C1)/C0)y(t)
Equivalent circuit diagram is as shown in Figure 3 and Figure 4.
During specific implementation, dummy source can be set as follows：Starting voltage：0V, the amplitude of pulse are：200kv, when
Between postpone：2ns, rise time：10ns, fall time is：10ns, the width of pulse：100ns.When adjustment divider parameter is
Rml=439 Ω, L1=1.2pH, Rm2=30 Ω, L2=0.12pH, simulation result is as shown in figure 5, repeatedly adjust simulation parameter
It is whole that to obtain result ideal.
To examine the accuracy of induced voltage measuring instrument, applied respectively in the measurement of 1292 line line parameter circuit value of 110kV people's salt
High voltage electrostatic voltmeter and induced voltage tester carry out contrast test, and contrast is found：Both are sufficiently close to measurement result, this
Show that type induced voltage measuring instrument test accuracy is higher.Test result such as table 1 below.
1. 110kV transmission line of electricity induced voltage measurement results of table
As shown in fig. 6, oscillograph 2, including receiving unit 21, A/D converter 22, controller 23, waveform display unit 24
With transmitting element 25.Wherein, the input terminal of receiving unit 21 is connected with the output terminal of induced voltage detection device, receiving unit 21
An output terminal be connected with waveform display unit 24, another output terminal of receiving unit 21 and the input terminal of A/D converter 22
Connection, the output terminal of A/D converter 22 are connected with the input terminal of controller 23, and output terminal and the transmitting element 24 of controller 23 connect
Connect.
Induced voltage cancellation element 3, can set different dispelling tactics, below one or two of embodiment illustrate.Its
Middle one embodiment is that the resistance of multigroup different resistance value is provided with induced voltage cancellation element 3, every group of resistance and controller it
Between set switch.During specific implementation, control when current induced voltage is more than default first threshold, control induced voltage eliminates
The switch conduction of one or more groups of resistance in device, is connected in parallel on the both ends of detection circuit；The resistance value of one or more groups of resistance
Match with current induced voltage.It is achieved thereby that the elimination of induced voltage.Another embodiment is induced voltage cancellation element
Inside be provided with multiple breakers, each breaker respectively with the connection around current detection circuit and detection circuit；Control
Device processed switches current detection circuit from working status when current induced voltage is more than default first threshold, by breaker
To stand-by state, and when current induced voltage is less than default second threshold, circuit will be detected from spare shape by breaker
State is recovered to working status；The first threshold is more than second threshold.Even disappear so as to be reduced by very simple mode
Except induced voltage, the security of building-site is improved.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (8)
1. a kind of induced voltage detection device, it is characterised in that be connected including capacitive divider and with the capacitive divider
Peripheral circuit, the capacitive divider include the first capacitance C0 and the second capacitance C1；The peripheral circuit includes signal cable ripple
Impedance Z, build-out resistor R；
First capacitance C0 and the second capacitance C1 series connection, the first capacitance C0 and the second capacitance C1 common ports and signal cable wave impedance
The pin connection of the input terminal of Z, another pin of the input terminal of signal cable wave impedance Z are another with the second capacitance C1's of electricity
One end connects, and a pin of signal cable wave impedance Z output terminals is connected with one end of build-out resistor R, signal cable wave impedance Z
Another pin of output terminal is connected with the other end of build-out resistor R.
2. induced voltage detection device according to claim 1, it is characterised in that further include oscillograph input resistance R2,
Oscillograph input capacitance C2, the oscillograph input resistance R2 and input capacitance C2 are connected in parallel on the both ends of build-out resistor R respectively.
3. induced voltage detection device according to claim 1, it is characterised in that further include compensation resistance R1, the benefit
Resistance R1 is repaid to be series between build-out resistor R and oscillograph input capacitance C2.
4. a kind of induced voltage control system, it is characterised in that including induced voltage detection device, with induced voltage detection device
The oscillograph of connection, the periphery electricity that the induced voltage detection device includes capacitive divider and is connected with the capacitive divider
Road, the capacitive divider include the first capacitance C0 and the second capacitance C1；The peripheral circuit include signal cable wave impedance Z,
Build-out resistor R；
First capacitance C0 and the second capacitance C1 series connection, the first capacitance C0 and the second capacitance C1 common ports and signal cable wave impedance
The pin connection of the input terminal of Z, another pin of the input terminal of signal cable wave impedance Z are another with the second capacitance C1's of electricity
One end connects, and a pin of signal cable wave impedance Z output terminals is connected with one end of build-out resistor R, signal cable wave impedance Z
Another pin of output terminal is connected with the other end of build-out resistor R.
5. induced voltage control system according to claim 4, it is characterised in that the induced voltage detection device is also wrapped
Include oscillograph input resistance R2 and oscillograph input capacitance C2, the oscillograph input resistance R2 and input capacitance C2 is in parallel respectively
At the both ends of build-out resistor R.
6. induced voltage control system according to claim 5, it is characterised in that the induced voltage detection device is also wrapped
Compensation resistance R1 is included, the compensation resistance R1 is series between build-out resistor R and oscillograph input capacitance C2.
7. induced voltage control system according to claim 4, it is characterised in that induced voltage cancellation element is further included,
One end of the induced voltage cancellation element is connected with oscillograph, the other end and the circuit to be measured of the induced voltage cancellation element
Connection.
8. induced voltage control system according to claim 4, it is characterised in that the oscillograph include receiving unit,
Transmitting element, microprocessor and A/D converter, waveform display unit, input terminal and the induced voltage of the receiving unit detect
The output terminal connection of device, an output terminal of the receiving unit is connected with waveform display unit, the receiving unit it is another
The input terminal of one output terminal and A/D converter connects, and the output terminal of the A/D converter and the input terminal of microprocessor connect,
The output terminal of microprocessor is connected with transmitting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721198725.1U CN207281165U (en) | 2017-09-18 | 2017-09-18 | A kind of induced voltage detection device and its control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721198725.1U CN207281165U (en) | 2017-09-18 | 2017-09-18 | A kind of induced voltage detection device and its control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207281165U true CN207281165U (en) | 2018-04-27 |
Family
ID=61982447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721198725.1U Expired - Fee Related CN207281165U (en) | 2017-09-18 | 2017-09-18 | A kind of induced voltage detection device and its control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207281165U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110297121A (en) * | 2019-08-01 | 2019-10-01 | 贵州电网有限责任公司 | A kind of capacitive divider low pressure measurement circuit and measurement method |
| TWI765754B (en) * | 2021-06-24 | 2022-05-21 | 台灣電力股份有限公司 | With circuit arrangement for eliminating induced voltage |
-
2017
- 2017-09-18 CN CN201721198725.1U patent/CN207281165U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110297121A (en) * | 2019-08-01 | 2019-10-01 | 贵州电网有限责任公司 | A kind of capacitive divider low pressure measurement circuit and measurement method |
| TWI765754B (en) * | 2021-06-24 | 2022-05-21 | 台灣電力股份有限公司 | With circuit arrangement for eliminating induced voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101403777B (en) | Resistive current tester for great current zinc oxide lightning arrester | |
| CN107390081A (en) | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding | |
| CN101887110A (en) | Device and method for detecting insulating oil dielectric strength tester | |
| CN103852697B (en) | Cable partial discharge detection device | |
| CN106154202A (en) | A kind of calibration steps of electrical short-circuit testing & measuring system | |
| CN207281165U (en) | A kind of induced voltage detection device and its control system | |
| CN109141218A (en) | A kind of deformation of transformer winding detection method | |
| CN207181589U (en) | It is a kind of to be used for the device being monitored powered to deformation of transformer winding | |
| Uddin et al. | Detection and locating the point of fault in distribution side of power system using WSN technology | |
| CN101504448A (en) | Integral polarity test method for current mutual inductor | |
| CN110031677A (en) | Dry-type air-core reactor scene impedance measuring circuit and detection method | |
| CN106053946A (en) | Photovoltaic direct-current insulating monitoring method and device and photovoltaic system | |
| CN207908603U (en) | A kind of circuit artificial earthing short-circuit test overall process current detecting system | |
| CN107727920A (en) | A kind of induced voltage control system and its method | |
| CN105371742A (en) | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method | |
| CN201387462Y (en) | Device for verifying dielectric strength testing instrument of insulated oil | |
| CN205920179U (en) | High voltage transmission lines construction grounding detection device | |
| CN104502769A (en) | Test circuit and test method for testing secondary short-circuit prevention protectors of voltage transformers | |
| CN104034977A (en) | Capacitive voltage transformer electrified detector | |
| CN107024613A (en) | High-voltage feedback power cable square wave on-line overvoltage monitor | |
| CN206541018U (en) | A kind of multipoint grounding seeking instrument of voltage transformer | |
| CN104215862A (en) | Arrester and state discriminated method of online monitoring meter thereof | |
| CN107957568A (en) | Secondary Circuit of Potential Transformer multipoint earthing Quick positioning instrument and lookup method | |
| CN107843759A (en) | The surge current test system and method for testing of electronic equipment in spacecraft | |
| CN203101524U (en) | High voltage fast pulse measurement mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180427 Termination date: 20200918 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |