CN107727920A - A kind of induced voltage control system and its method - Google Patents
A kind of induced voltage control system and its method Download PDFInfo
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- CN107727920A CN107727920A CN201710845579.5A CN201710845579A CN107727920A CN 107727920 A CN107727920 A CN 107727920A CN 201710845579 A CN201710845579 A CN 201710845579A CN 107727920 A CN107727920 A CN 107727920A
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- induced voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
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- General Physics & Mathematics (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a kind of induced voltage control system, including induced voltage detection means, the oscillograph being connected with the induced voltage detection means, the induced voltage detection means include the capacitive divider being connected with circuit to be measured, peripheral circuit are connected with the output end of the capacitive divider；The oscillograph includes controller, and the controller is used for the detection voltage from peripheral circuit compared with default threshold value, judges whether the induced electromotive force of current detection is more than default first threshold, and after being judged as YES, alert.In addition, the invention also discloses a kind of induced voltage control method.Using the present invention, the measurement accuracy of induced voltage is improved, improves security performance.
Description
Technical field
The present invention relates to induced voltage technical field, more particularly to a kind of induced voltage control system and its method.
Background technology
Electromagnetic environment residing for transformer station is power frequency electromagnetic field, is a kind of quasi-static field.The metallic conductor being in the electric field
By Capacitance Coupled 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 means measures, staff according to
The result of detection judge whether the situation of danger, is not the deterministic process of automation, is to need personnel to enter to scene
What row judged, therefore very big injury can be caused to the personal safety of personnel.
The content of the invention
It is an object of the invention to provide a kind of induced voltage control system and its method, security performance is improved.
To solve the problems, such as that prior art is present, the present invention provides a kind of induced voltage control system, and the system includes：Sense
Answer voltage check device, the oscillograph being connected with the induced voltage detection means, the induced voltage detection means include with
The connected capacitive divider of circuit to be measured, peripheral circuit is connected with the output end of the capacitive divider；
The oscillograph includes controller, and the controller is used for the detection voltage from peripheral circuit and default threshold
Value compares, and judges whether the induced electromotive force of current detection is more than default first threshold, and after being judged as YES, sends alarm
Information.
The oscillograph of the technical program is provided with controller including controller ripple device, and the controller can be in current induced electricity
Pressure sends alarm signal when exceeding default threshold value, so as to remind field personnel, improves security.
Preferably, in addition to induced voltage cancellation element, a side controller of the induced voltage cancellation element connect, institute
State the other end of induced voltage cancellation element and connection to be measured.The induced voltage cancellation element that the technical program is set can be with
For reducing induced voltage automatically, security is improved.
Preferably, the induced voltage cancellation element is provided with the resistance of multigroup different resistances, every group of resistance and controller
Between set switch；
The controller, it is additionally operable to 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, it is connected in parallel on the both ends of detection circuit；The resistance of one or more groups of resistance
Match with current induced voltage.
The technical program controls the switch conduction with detecting connection of induced voltage cancellation element by controller, from
And it is detection parallel resistance, serve the effect for reducing induced voltage.And resistance and the current induced voltage phase of series connection
Match somebody with somebody, improve operating efficiency, improve security performance.
Preferably, multiple breakers are provided with the induced voltage cancellation element, the breaker is examined with current respectively
Connection around survey line road and detection circuit；
The controller, it is additionally operable to when current induced voltage is more than default first threshold, will be current by breaker
Detection circuit is switched to stand-by state from working condition, and when current induced voltage is less than default Second Threshold, by disconnected
Road device recovers circuit is detected to working condition from stand-by state；The first threshold is more than Second Threshold.
Controller in the technical program, the breaker in induced voltage cancellation element is controlled to start work, so that inspection
Survey line road switches to stand-by state from working condition, adjusts induced voltage in this way, realizes the automatic of induced voltage
Control.
Preferably, the capacitive divider includes the first electric capacity C0 and the second electric capacity C1；The peripheral circuit includes signal
Cable wave impedance Z, build-out resistor R；
First electric capacity C0 and the second electric capacity C1 series connection, the first electric capacity C0 and the second electric capacity C1 common ports and signal cable ripple
The pin connection of the input of impedance Z, another pin and the second electric capacity C1 of electricity of signal cable wave impedance Z input
Other end connection, a pin of signal cable wave impedance Z output ends is connected with build-out resistor R one end, signal cable ripple
Another pin of impedance Z output end is connected with the build-out resistor R other end.Realize the accurate measurement of induced voltage.
Preferably, in addition to oscillograph input resistance R2 and oscillograph input capacitance C2, the oscillograph input resistance R2
It is connected in parallel on build-out resistor R both ends respectively with input capacitance C2.Input resistance and electric capacity are set for oscillograph, improve circuit
Security performance.
Preferably, the induced voltage detection means is also series at matching including compensation resistance R1, the compensation resistance R1
Between resistance R and oscillograph input capacitance C2.By compensating the setting of resistance, the measurement essence of induced voltage is further increased
Degree.
The corresponding present invention also provides a kind of induced voltage control method, and the control system of the control method application includes
Induced voltage detection means, one end and the connection to be measured of the induced voltage detection means, the induced voltage detection dress
The other end put and oscillograph oscillograph, the oscillograph include controller；This method includes：
Induced voltage detection means obtains the induced voltage of circuit to be measured, and the induced voltage of acquisition is sent to oscillography
Device；
The current induced voltage of oscilloscope display, and current induced voltage is sent to controller；
Controller by current induced voltage compared with default first threshold, and current induced voltage be more than it is default
During first threshold, alert.
Preferably, the control system of the control method application also includes induced voltage cancellation element, the induced voltage
Cancellation element is provided with the resistance of multigroup different tissues, and every group sets switch between resistance and controller；This method also includes：
Controller is controlled one in induced voltage cancellation element when induced voltage before detecting is more than default first threshold
The switch conduction of group or multigroup resistance, it is connected in parallel on the both ends of detection circuit；The resistance of one or more groups of resistance and current sense
Voltage is answered to match.
Preferably, the control system of the control method application includes induced voltage detection means, and the induced voltage disappears
Except multiple breakers are provided with device, the breaker connects with the circuit around current detection circuit and detection circuit respectively
Connect；This method also includes：
The controller is when current induced voltage is more than default first threshold, by breaker by current detection circuit
Stand-by state is switched to from working condition, and when current induced voltage is less than default Second Threshold, will be examined by breaker
Recover from stand-by state to working condition on survey line road；The first threshold is more than Second Threshold.
Oscillograph in the induced voltage control system of the present invention is provided with controller, and the controller can be in current sensing
Voltage sends alarm signal when exceeding default threshold value, so as to remind field personnel, improves security performance.
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 present invention；
Fig. 2 is the circuit theory schematic diagram of the induced voltage detection means in a kind of induced voltage control system of the present invention；
Fig. 3, Fig. 4, which are that the circuit theory of induced voltage detection means in a kind of induced voltage control system of the present invention is equivalent, to be shown
It is intended to；
Fig. 5 is induced voltage detection means Detection results emulation schematic diagram in a kind of induced voltage control system of the present invention；
Fig. 6 is a kind of embodiment schematic diagram of oscillograph in a kind of induced voltage control system of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the figure is a kind of schematic diagram of induced voltage control system of the present invention, and the system includes：Induced voltage
Detection means 1, oscillograph 2, induced voltage cancellation element 3；One end of induced voltage detection means 1 and connection to be measured, sense
The other end of voltage check device 1 is answered to be connected with one end of oscillograph 2, the other end and the induced voltage cancellation element of oscillograph 2
3 one end connection, the other end of induced voltage cancellation element and connection to be measured.Therefore, voltage check device 1 can be passed through
The induced voltage of circuit to be measured is detected, then carrying out oscillography by oscillograph 2 shows, and passes through the sensing with connection to be measured
Voltage cancellation element eliminates the induced voltage in circuit to be measured, it is achieved thereby that the induced voltage of automatic detection building-site, and
Induced voltage caused by adjust automatically, improve the security of building-site.
As shown in Fig. 2 induced voltage detection means 1, including the capacitance partial pressure 11 that is connected with circuit to be measured and with electric capacity point
The output end of depressor 11 is connected with peripheral circuit 12.Wherein capacitive divider 11 includes：First electric capacity C0 and the second electric capacity C1；Outside
Enclosing circuit 12 includes signal cable wave impedance Z, build-out resistor R；First electric capacity C0 and the second electric capacity C1 series connection, the first electric capacity C0 and
Second electric capacity C1 common ports are connected with a pin of signal cable wave impedance Z input, signal cable wave impedance Z input
End another pin be connected with the second electric capacity C1 of the electricity other end, a pin of signal cable wave impedance Z output ends and
One end connection with resistance R, another pin of signal cable wave impedance Z output ends are connected with the build-out resistor R other end.
Wherein, C0, C1 are respectively high pressure, low-voltage arm electric capacity；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, electric capacity；R2 and C is input resistance, the electric capacity of oscillograph.Oscillograph
For input resistance R2 much larger than compensation resistance R1, then C1 output y (t) 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
Rm1=439 Ω, L1=1.2pH, Rm2=30 Ω, L2=0.12pH, simulation result is as shown in figure 5, to the multiple tune of 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 the line line parameter circuit value of 110kV people's salt 1292
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.
The 110kV transmission line of electricity induced voltage measurement results of table 1.
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 of receiving unit 21 is connected with the output end of induced voltage detection means, receiving unit 21
An output end be connected with waveform display unit 24, another output end of receiving unit 21 and the input of A/D converter 22
Connection, the output end of A/D converter 22 are connected with the input of controller 23, and output end and the transmitting element 24 of controller 23 connect
Connect.
Induced voltage cancellation element 3, different dispelling tactics can be set, below one or two of embodiment illustrate.Its
Middle one embodiment is that the resistance of multigroup different resistances 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, it is connected in parallel on the both ends of detection circuit；The resistance 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 condition 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 standby shape by breaker
State is recovered to working condition；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.
Illustrate another aspect of the present invention below.
A kind of a kind of flow of embodiment of induced voltage control method of the present invention includes：
Step s11, induced voltage detection means obtains the induced voltage of circuit to be measured, and the induced voltage of acquisition is sent
To oscillograph；
Step s12, the current induced voltage of oscilloscope display, and current induced voltage is sent to controller；
Step s13, controller by current induced voltage compared with default first threshold, it is and big in current induced voltage
When default first threshold, alert.
During specific implementation, it can also include in step s13：Controller induced voltage before detecting is more than default the
During one threshold value, the switch conduction of one or more groups of resistance in induced voltage cancellation element is controlled, is connected in parallel on the both ends of detection circuit；
The resistance of one or more groups of resistance matches with current induced voltage.
In addition, it can also include in step s13：Controller leads to when current induced voltage is more than default first threshold
Cross breaker and current detection circuit is switched to stand-by state from working condition, and be less than default second in current induced voltage
During threshold value, recovered by breaker by circuit is detected from stand-by state to working condition；The first threshold is more than Second Threshold.
In addition, it can also include in step s13：Control is entered according to by the induced voltage of detection and default 3rd threshold value
Row compares, if current induced voltage is more than default 3rd threshold value, the breaker that unit is eliminated by induced voltage ought
Preceding detection circuit is switched to stand-by state from working condition；If current induced voltage is more than default first threshold and is less than in advance
If the 3rd threshold value, then select induced voltage cancellation element in resistor coupled in parallel detection circuit on, to reduce induced voltage.Its
In default 3rd threshold value be more than default first threshold.The induced voltage of building-site is reduced in this way, is improved
Security.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of induced voltage control system, it is characterised in that including induced voltage detection means, detected with the induced voltage
The oscillograph of device connection, the induced voltage detection means includes the capacitive divider being connected with circuit to be measured, with the electricity
The output end for holding divider is connected with peripheral circuit；
The oscillograph includes controller, and the controller is used for the detection voltage from peripheral circuit and default threshold value ratio
Compared with judging whether the induced electromotive force of current detection is more than default first threshold, and after being judged as YES, send alarm signal
Breath.
2. induced voltage control system according to claim 1, it is characterised in that also including induced voltage cancellation element,
The side controller connection of the induced voltage cancellation element, the other end and the circuit to be measured of the induced voltage cancellation element connect
Connect.
3. induced voltage control system according to claim 2, it is characterised in that the induced voltage cancellation element is set
There is the resistance of multigroup different resistances, every group sets switch between resistance and controller；
The controller, it is additionally operable to when current induced voltage is more than default first threshold, controls induced voltage cancellation element
In one or more groups of resistance switch conduction, be connected in parallel on detection circuit both ends；The resistance of one or more groups of resistance is with working as
Preceding induced voltage matches.
4. induced voltage control system according to claim 2, it is characterised in that set in the induced voltage cancellation element
Be equipped with multiple breakers, the breaker respectively with the connection around current detection circuit and detection circuit；
The controller, it is additionally operable to when current induced voltage is more than default first threshold, by breaker by current detection
Circuit is switched to stand-by state from working condition, and when current induced voltage is less than default Second Threshold, passes through breaker
Detection circuit is recovered to working condition from stand-by state；The first threshold is more than Second Threshold.
5. induced voltage control system according to claim 1, it is characterised in that the capacitive divider includes the first electricity
Hold C0 and the second electric capacity C1；The peripheral circuit includes signal cable wave impedance Z, build-out resistor R；
First electric capacity C0 and the second electric capacity C1 series connection, the first electric capacity C0 and the second electric capacity C1 common ports and signal cable wave impedance
The pin connection of Z input, another pin of signal cable wave impedance Z input are another with the second electric capacity C1's of electricity
One end is connected, and a pin of signal cable wave impedance Z output ends is connected with build-out resistor R one end, signal cable wave impedance Z
Another pin of output end is connected with the build-out resistor R other end.
6. induced voltage control system according to claim 5, it is characterised in that also including oscillograph input resistance R2 and
Oscillograph input capacitance C2, the oscillograph input resistance R2 and input capacitance C2 are connected in parallel on build-out resistor R both ends respectively.
7. induced voltage control system according to claim 6, it is characterised in that the induced voltage detection means is also wrapped
Compensation resistance R1 is included, the compensation resistance R1 is series between build-out resistor R and oscillograph input capacitance C2.
8. a kind of induced voltage control method, the control system of the control method application includes induced voltage detection means, institute
The one end and connection to be measured, the other end of the induced voltage detection means for stating induced voltage detection means show with oscillograph
Ripple device, the oscillograph include controller；This method includes：
Induced voltage detection means obtains the induced voltage of circuit to be measured, and the induced voltage of acquisition is sent to oscillograph；
The current induced voltage of oscilloscope display, and current induced voltage is sent to controller；
Current induced voltage is more than default first by controller compared with default first threshold, and in current induced voltage
During threshold value, alert.
9. induced voltage control method according to claim 8, it is characterised in that the control system of the control method application
System also includes induced voltage cancellation element, and the induced voltage cancellation element is provided with the resistance of multigroup different tissues, every group of electricity
Set and switch between resistance and controller；This method also includes：
Controller when induced voltage before detecting is more than default first threshold, control induced voltage cancellation element in one group or
The switch conduction of multigroup resistance, it is connected in parallel on the both ends of detection circuit；The resistance of one or more groups of resistance and current induced electricity
Pressure matches.
10. induced voltage control method according to claim 8, the control system of the control method application includes sensing
Voltage check device, is provided with multiple breakers in the induced voltage cancellation element, the breaker respectively with current detection
Connection around circuit and detection circuit；This method also includes：
The controller is when current induced voltage is more than default first threshold, by breaker by current detection circuit from work
Stand-by state is switched to as state, and when current induced voltage is less than default Second Threshold, by breaker by detection line
Recover from stand-by state to working condition on road；The first threshold is more than Second Threshold.
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| CN201710845579.5A CN107727920A (en) | 2017-09-18 | 2017-09-18 | A kind of induced voltage control system and its method |
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| CN201710845579.5A CN107727920A (en) | 2017-09-18 | 2017-09-18 | A kind of induced voltage control system and its method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802481A (en) * | 2018-06-20 | 2018-11-13 | 国网安徽省电力有限公司滁州供电公司 | A kind of route survey device |
| CN108802480A (en) * | 2018-06-20 | 2018-11-13 | 国网安徽省电力有限公司滁州供电公司 | A kind of induced voltage measuring device |
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