CN109449913A - Arc suppression coil intelligently holds stream interference method - Google Patents
Arc suppression coil intelligently holds stream interference method Download PDFInfo
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- CN109449913A CN109449913A CN201811425718.XA CN201811425718A CN109449913A CN 109449913 A CN109449913 A CN 109449913A CN 201811425718 A CN201811425718 A CN 201811425718A CN 109449913 A CN109449913 A CN 109449913A
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- Prior art keywords
- arc suppression
- suppression coil
- intervention
- voltage
- capacitor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a kind of arc suppression coils intelligently to hold stream interference method, the stable state zero sequence equivalent circuit of system is that unbalance voltage U, arc suppression coil inductance L, damping resistance R and the equivalent direct-to-ground capacitance C of system are connected in series the circuit of composition in route, wherein, one end of resistance R is grounded, and the electric current in the circuit is the appearance stream of the equivalent direct-to-ground capacitance C of the system；With a master controller, the master controller can obtain the parameter information in the circuit, the interference method includes capacitor intervention and voltage intervention, break the false equilibrium of the arc suppression coil and the equivalent direct-to-ground capacitance of system on the system neutral conductor by capacitor intervention, it forces controller to recalculate appearance stream and carries out calibration of transferring the files, when safeguards system breaks down, arc suppression coil compensation is suitable, avoids undercompensation or full compensation；It by voltage intervention, is provided to the appearance stream calculation of system circuit and calculates voltage, so that the normal computing system of master controller is held stream, promote arc suppression coil to be transferred the files and be adjusted to suitable gear, avoid arc suppression coil compensation improper.
Description
Technical field
The present invention relates to a kind of arc suppression coils intelligently to hold stream interference method.
Background technique
Main problem existing for arc-extinguishing coil automatic tuning complexes is that capacitance current calculates inaccurate problem, body at present
It is present: first is that gear be parked in off-resonance point can not auto-returned (the calculated capacitance current mistake of arc suppression coil, but stop shelves
Position meets tuning-off degree, residual flow or voltage without fluctuation, and arc-suppressing controller will not issue instruction and transfer the files, recalculate)；Second is that at system
In equilibrium state, neutral point non-displacement voltage, arc suppression coil can not sample calculating, and (system balancing, neutral point non-displacement voltage are whole
The neutral conductor of a system can not calculate capacitance current, stopped gear and default gear for before, may go out greatly very much without loop current
It now compensates improper)；
Fig. 1 is the stable state zero sequence equivalent circuit diagram of system, and formula of capacitive current is as follows:
In above formula, U0For unbalance voltage, I0For neutral point current, system changes system by adjusting arc suppression coil L
Neutral point voltage Un, neutral point current to establish state equation carry out the capacitance current I of computing system0。
When system is far from resonance point, especially more arc suppression coil parallel runnings, the reaction component of system is (empty in formula
Portion) it will be much larger than active component (real part in formula), at this point, adjusting neutral point voltage, neutral point current caused by arc suppression coil
Variation it is unobvious, it would be possible to cause to calculate error and become larger, that is, the first feelings that above-mentioned capacitance current calculates inaccuracy occur
Condition.
As system overbalance (U0It is too small) or system there are harmonic waves, can also cause calculate error become larger, that is, occur above-mentioned
Capacitance current calculates the second situation of inaccuracy.
Summary of the invention
The present invention provides a kind of arc suppression coils intelligently to hold stream interference method, and which overcome described in background technology existing
The deficiency of technology.
The technical solution adopted by the present invention to solve the technical problems is:
Arc suppression coil intelligently holds stream interference method, if the unbalance voltage of system is U in route0, arc suppression coil inductance is
L, damping resistance R, the equivalent direct-to-ground capacitance of system are C, then the stable state zero sequence equivalent circuit of system is unbalance voltage U, extinguishing arc
Coil inductance L, damping resistance R and the equivalent direct-to-ground capacitance C of system are connected in series the circuit of composition, wherein one end of resistance R is grounded；
With a master controller, which can obtain the parameter information in the circuit, which includes capacitor intervention, the capacitor
Intervention are as follows: when the master controller detect required parameter information change rate be less than given threshold, then issue instruction at this
It is incorporated to intervention capacitor between the neutral point and ground of system, and then the appearance stream of the system calculate and to the gear of arc suppression coil
It is calibrated, capacitor is intervened after calibration and exits the system.
Among one embodiment: the interference method further includes voltage intervention, the voltage intervention are as follows: when the master controller is examined
When measuring the voltage of system neutral less than the calculating thresholding for holding stream, then issues instruction and sealed in above damping resistance in the system
Intervene voltage source, and then the appearance stream of the system calculate and the gear of the arc suppression coil is adjusted, intervenes after adjusting
Voltage source logs off.
Among one embodiment: the required parameter information includes that appearance stream in the system changes with time rate and/or extinguishing arc
The gear of coil adjusts situation of change, when the change rate is consistently lower than given threshold within the set time, and/or, arc suppression coil
Gear it is constant always in the setting time, then the master controller issue instruction is incorporated to intervention capacitor within the system.
Among one embodiment: the intervention capacitor is incorporated to the system using vacuum contactor switching.
Among one embodiment: the intervention voltage source seals in the system using isolating transformer.
Among one embodiment: sealing in after intervening voltage source, the voltage value at system neutral is no more than 50V.
Among one embodiment: when ground fault occurs for the system, intervening capacitor and intervene voltage source stopping input coefficient.
Among one embodiment: the intervention capacitor and intervention voltage source are remotely controlled switching by remote terminal.
The technical program compared with the background art, it has the following advantages:
The false equilibrium for breaking the arc suppression coil and the equivalent direct-to-ground capacitance of system on the system neutral conductor by capacitor intervention, forces
Controller recalculates appearance stream and carries out calibration of transferring the files, and when safeguards system breaks down, arc suppression coil compensation is suitable, avoids undercompensation
Or full compensation.
By voltage intervention, is provided to the appearance stream calculation of system circuit and calculate voltage, master controller is enable normally to calculate
System holds stream, promotes arc suppression coil to be transferred the files and is adjusted to suitable gear, avoids arc suppression coil compensation improper.
The intervention capacitor and intervention voltage source can be remotely controlled switching by remote terminal, improve capacitor intervention and capacitor intervention
Intelligence.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the stable state zero sequence equivalent circuit diagram of system described in background technology.
Fig. 2 is the flow chart of capacitor intervention described in the present embodiment.
Fig. 3 is the flow chart of voltage intervention described in the present embodiment.
Fig. 4 is the equivalent circuit diagram being incorporated on neutral point after intervening capacitor in the present embodiment.
Fig. 5 is to seal in the equivalent circuit diagram after intervening voltage source in damping resistance side in the present embodiment.
Specific embodiment
1 to Fig. 5 is please referred to, arc suppression coil intelligently holds stream interference method, if the unbalance voltage of system is U in route0, disappear
Arc coil inductance is L, and damping resistance R, the equivalent direct-to-ground capacitance of system is C, then the stable state zero sequence equivalent circuit of system is injustice
Weighing apparatus voltage U, arc suppression coil inductance L, damping resistance R and the equivalent direct-to-ground capacitance C of system are connected in series the circuit of composition, wherein resistance R
One end ground connection；With a master controller, which can obtain the parameter information in the circuit, which includes capacitor
Intervene, the capacitor intervention are as follows: when the master controller detect required parameter information change rate be less than given threshold, then send out
It instructs to be incorporated between the neutral point and ground of the system out and intervenes capacitor C1, and then the appearance stream of the system is calculated and offseted
The gear of arc coil is calibrated, if once intervening calculated appearance stream results abnormity, needs to carry out secondary (again) intervention, directly
Intervene capacitor until calculated appearance stream result normal (correct), after calibration and exits the system.The capacitor interference method is applicable in
In the first situation described in background technology for holding stream calculation inaccuracy problem.
During the capacitor is intervened, required parameter information includes that appearance stream in the system changes with time rate and/or arc blowout wire
The gear of circle adjusts situation of change, when the change rate is consistently lower than given threshold within the set time, and/or, arc suppression coil
Gear is constant always in the setting time, then the master controller issues instruction and is incorporated to intervention capacitor within the system.The intervention
Capacitor can be used vacuum contactor switching and be incorporated to the system.
The interference method further includes voltage intervention, the voltage intervention are as follows: when the master controller detects system neutrality
When the voltage of point is less than the calculating thresholding for holding stream, then instruction is issued in the system and seals in intervention voltage source above damping resistance
U1, and then the appearance stream of the system calculate and the gear of the arc suppression coil is adjusted, if once intervening calculated
Hold stream results abnormity, then needs to carry out secondary (again) intervention, until calculated appearance stream result normal (correct), after adjusting
Intervene voltage source to log off.The voltage interference method is suitable for described in background technology holding the of stream calculation inaccuracy problem
Two kinds of situations.
The intervention voltage source can be used isolating transformer and seal in the system.It seals in after intervening voltage source, at system neutral
Voltage value be no more than 50V, to reduce the influence of the intervention voltage source to system.
When ground fault occurs for the system, intervenes capacitor and intervene voltage source stopping input coefficient.
Preferably, the intervention capacitor and intervention voltage source can be remotely controlled switching by remote terminal, improve interfering system
Intelligence.
The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to
Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.
Claims (8)
1. arc suppression coil intelligently holds stream interference method, if the unbalance voltage of system is U in route0, arc suppression coil inductance is L, resistance
Buffer resistance is R, and the equivalent direct-to-ground capacitance of system is C, then the stable state zero sequence equivalent circuit of system is unbalance voltage U, arc suppression coil
Inductance L, damping resistance R and the equivalent direct-to-ground capacitance C of system are connected in series the circuit of composition, wherein one end of resistance R is grounded；It is special
Sign is: having a master controller, which can obtain the parameter information in the circuit, which includes that capacitor is dry
In advance, the capacitor intervention are as follows: when the master controller detect required parameter information change rate be less than given threshold, then issue
Instruction is incorporated to intervention capacitor between the neutral point and ground of the system, and then calculate and to the extinguishing arc to the appearance stream of the system
The gear of coil is calibrated, and capacitor is intervened after calibration and exits the system.
2. arc suppression coil according to claim 1 intelligently holds stream interference method, it is characterised in that: the interference method further includes
Voltage intervention, the voltage intervention are as follows: when the master controller detects that the voltage of system neutral is less than the calculating door for holding and flowing
In limited time, then it issues instruction and seals in intervention voltage source above damping resistance in the system, and then the appearance stream of the system is counted
It calculates and the gear of the arc suppression coil is adjusted, voltage source is intervened after adjusting and is logged off.
3. arc suppression coil according to claim 1 or 2 intelligently holds stream interference method, it is characterised in that: the required parameter letter
Breath includes that appearances stream in the system changes with time the gear adjusting situation of change of rate and/or arc suppression coil, when the change rate
It is consistently lower than given threshold within the set time, and/or, the gear of arc suppression coil is constant always in the setting time, then should
Master controller issues instruction and is incorporated to intervention capacitor within the system.
4. arc suppression coil according to claim 1 intelligently holds stream interference method, it is characterised in that: the intervention capacitor is using true
Empty contactor switching is incorporated to the system.
5. arc suppression coil according to claim 2 intelligently holds stream interference method, it is characterised in that: the intervention voltage source uses
Isolating transformer seals in the system.
6. arc suppression coil according to claim 2 intelligently holds stream interference method, it is characterised in that: seal in intervention voltage source
Afterwards, the voltage value at system neutral is no more than 50V.
7. arc suppression coil according to claim 2 intelligently holds stream interference method, it is characterised in that: when the system is grounded
When failure, intervenes capacitor and intervene voltage source stopping input coefficient.
8. arc suppression coil according to claim 1 or 2 intelligently holds stream interference method, it is characterised in that: the intervention capacitor
Switching is remotely controlled by remote terminal with voltage source is intervened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425718.XA CN109449913B (en) | 2018-11-27 | 2018-11-27 | Intelligent current capacity intervention method for arc suppression coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425718.XA CN109449913B (en) | 2018-11-27 | 2018-11-27 | Intelligent current capacity intervention method for arc suppression coil |
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| Publication Number | Publication Date |
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| CN109449913A true CN109449913A (en) | 2019-03-08 |
| CN109449913B CN109449913B (en) | 2023-09-29 |
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| CN201811425718.XA Active CN109449913B (en) | 2018-11-27 | 2018-11-27 | Intelligent current capacity intervention method for arc suppression coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341246A (en) * | 2021-05-24 | 2021-09-03 | 国网陕西省电力公司西安供电公司 | Arc suppression coil testing device and method based on capacitance calibration |
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| CN113341246A (en) * | 2021-05-24 | 2021-09-03 | 国网陕西省电力公司西安供电公司 | Arc suppression coil testing device and method based on capacitance calibration |
| CN113341246B (en) * | 2021-05-24 | 2024-02-06 | 国网陕西省电力公司西安供电公司 | Arc suppression coil testing device and method based on capacitance calibration |
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| CN109449913B (en) | 2023-09-29 |
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