CN109167345B - A kind of ground fault arc-suppressing method and device based on controllable voltage source - Google Patents
A kind of ground fault arc-suppressing method and device based on controllable voltage source Download PDFInfo
- Publication number
- CN109167345B CN109167345B CN201811123691.9A CN201811123691A CN109167345B CN 109167345 B CN109167345 B CN 109167345B CN 201811123691 A CN201811123691 A CN 201811123691A CN 109167345 B CN109167345 B CN 109167345B
- Authority
- CN
- China
- Prior art keywords
- resistance
- voltage
- voltage source
- ground
- fault
- 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.)
- Active
Links
Classifications
-
- 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
Abstract
The application discloses a kind of ground fault arc-suppressing method and device based on controllable voltage source, which comprises continuously measures three-phase voltage, zero-sequence current and residual voltage；When detect break down when, failure phase is judged according to three-phase voltage；Voltage when failure mutually operates normally, line mutual-ground capacitor, bleeder resistance, fault ground resistance, arc suppression coil inductance, resistance and controllable voltage source internal resistance are obtained, the voltage of controllable voltage source output is calculated；By SPWM or SVPWM modulation algorithm, the voltage of controllable voltage source output is exported.The application by way of accessing voltage source, without consider arc suppression coil inductance parameters and line mutual-ground capacitor close to industrial frequency resonance state issues, it is easier to control, can effective compensation fault current, make fault point blow-out.The phase and amplitude of output voltage is obtained by calculation in the application, realizes that current in the fault point extinguishes by the amplitude and phase that control controllable voltage source, guarantees that power network safety operation and fault point do not cause the accidents such as fire.
Description
Technical field
This application involves T & D Technology field, in particular to a kind of ground fault arc-suppressing method based on controllable voltage source
And device.
Background technique
Medium voltage distribution network now generallys use small current neutral grounding mode (isolated neutral or through grounding through arc).It is neutral
The method of operation of the point through grounding through arc is also known as resonance grounding, can be by connecing in neutral point when singlephase earth fault occurs
The capacity current for the inductance current compensation fault point that inductance coil between ground generates, makes fault point arc extinction.However, disappearing
Arc coil can only compensate capacity current, cannot compensate watt current, furthermore, to avoid linear resonance, extinguisher compensativity cannot
It is too high.Cause earth fault compensation insufficient, grounding point fault current is unable to blow-out, causes line tripping, mountain fire and person electric shock.
Therefore, it is compensated entirely as being grounded fault current, grounding point electric arc will be effectively controlled.
The full compensation way having at present compensates to access current source by neutral point, but in the inductance of arc suppression coil
When parameter and line mutual-ground capacitor are close to industrial frequency resonance state, it is difficult to which the current value for guaranteeing injected system causes tired to arc extinguishing
It is difficult.
Summary of the invention
The application's is designed to provide a kind of controllable voltage source output voltage calculation method that ground fault compensates entirely, with
It solves the problems, such as to access current source by neutral point in the prior art and compensate to cause arc extinguishing difficult.
On the one hand, according to an embodiment of the present application, a kind of ground fault arc-suppressing method based on controllable voltage source is provided,
Include:
Continuous measurement three-phase voltage, zero-sequence current and residual voltage；
According to the zero-sequence current and the residual voltage, detect whether that singlephase earth fault occurs；
When detecting generation singlephase earth fault, failure phase is judged according to the three-phase voltage；
Obtain the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, bleeder resistance R0, fault ground electricity
Hinder Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Voltage when mutually being operated normally according to the failureLine mutual-ground capacitor C0, bleeder resistance R0, fault ground electricity
Hinder Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated；
By SPWM or SVPWM modulation algorithm, the switch off time of the full-bridge circuit thyristor of controllable voltage source is controlled, is exported
The voltage of the controllable voltage source output.
Further, voltage when mutually being operated normally according to failureLine mutual-ground capacitor C0, bleeder resistance R0,
Fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated
The step of, comprising:
According to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0With the line mutual-ground capacitor C0, meter
It calculates line-to-ground parameter and compensates the parallel impedance Z of inductance parameters1；
Voltage when mutually being operated normally according to the failureFault ground resistance Rf, the controllable voltage source internal resistance r
With the parallel impedance Z of the line-to-ground parameter and compensation inductance parameters1, calculate the voltage of controllable voltage source output.
Further, described according to arc suppression coil inductance L, resistance RL, bleeder resistance R0With line mutual-ground capacitor C0, calculate
The parallel impedance Z of line-to-ground parameter and compensation inductance parameters1, comprising:
Wherein, j is empty step, and ω is angular frequency.
Further, voltage when mutually being operated normally according to failureFault ground resistance Rf, the controllable electric
The parallel impedance Z of potential source internal resistance r and the line-to-ground parameter and compensation inductance parameters1, calculate the electricity of controllable voltage source output
Pressure, comprising:
Wherein,For the voltage of controllable voltage source output.
On the other hand, according to an embodiment of the present application, a kind of ground fault interrupter cartridge based on controllable voltage source is provided
It sets, comprising:
Measuring unit, for continuously measuring three-phase voltage, zero-sequence current and residual voltage；
For detecting whether according to the zero-sequence current and the residual voltage singlephase earth fault occurs for detection unit；
Judging unit, for judging failure phase according to the three-phase voltage when detecting generation singlephase earth fault；
Acquiring unit, for obtaining the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, leakage electricity
Hinder R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Computing unit, voltage when for mutually being operated normally according to the failureLine mutual-ground capacitor C0, leakage electricity
Hinder R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, controllable voltage source output is calculated
Voltage；
Output unit, for controlling the full-bridge circuit thyristor of controllable voltage source by SPWM or SVPWM modulation algorithm
Switch off time exports the voltage of the controllable voltage source output.
Further, the computing unit includes:
First computation subunit, for according to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0And institute
State line mutual-ground capacitor C0, calculate line-to-ground parameter and compensate the parallel impedance Z of inductance parameters1；
Second computation subunit, voltage when for mutually being operated normally according to the failureFault ground resistance Rf,
The parallel impedance Z of the controllable voltage source internal resistance r and the line-to-ground parameter and compensation inductance parameters1, calculate controllable voltage
The voltage of source output.
From the above technical scheme, the embodiment of the present application provides a kind of ground fault arc extinguishing side based on controllable voltage source
Method and device, which comprises continuously measure three-phase voltage, zero-sequence current and residual voltage；According to the zero-sequence current and
The residual voltage detects whether that singlephase earth fault occurs；When detecting generation singlephase earth fault, according to the three-phase
Voltage judges failure phase；Obtain the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, bleeder resistance R0, therefore
Hinder ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；When mutually being operated normally according to the failure
VoltageLine mutual-ground capacitor C0, bleeder resistance R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLAnd controllable voltage
Internal resistance r in source calculates the voltage of controllable voltage source output；By SPWM or SVPWM modulation algorithm, the full-bridge of controllable voltage source is controlled
The switch off time of circuit thyristor exports the voltage of the controllable voltage source output.The application by way of accessing voltage source,
Without consider arc suppression coil inductance parameters and line mutual-ground capacitor close to industrial frequency resonance state issues, it is easier to control, can have
Effect compensation fault current, makes fault point blow-out.The phase and amplitude of output voltage is obtained by calculation in the application, can by control
The amplitude and phase for controlling voltage source realize that current in the fault point extinguishes, and guarantee that power network safety operation and fault point do not cause fire
Calamity, accident of human electric shock.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the process according to a kind of ground fault arc-suppressing method based on controllable voltage source shown in the embodiment of the present application
Figure；
Fig. 2 is according to the controllable voltage source shown in the embodiment of the present application to the three-phase equivalent circuit of singlephase earth fault arc extinguishing
Figure；
Fig. 3 is according to the equivalent circuit for calculating fault ground electric current when there was only three phase mains shown in the embodiment of the present application；
Fig. 4 is according to the equivalent electricity for calculating fault ground electric current when there was only controllable voltage source shown in the embodiment of the present application
Road；
Fig. 5 is the structure according to a kind of ground fault arc-control device based on controllable voltage source shown in the embodiment of the present application
Figure.
Specific embodiment
Refering to fig. 1, embodiments herein provides a kind of ground fault arc-suppressing method based on controllable voltage source, packet
It includes:
Step S1, three-phase voltage, zero-sequence current and residual voltage are continuously measured；
Step S2, it according to the zero-sequence current and the residual voltage, detects whether that singlephase earth fault occurs；
Judge whether to be grounded from the size of zero-sequence current；Judge whether to be grounded from the size of residual voltage；
Step S3, when detecting generation singlephase earth fault, failure phase is judged according to the three-phase voltage；
It measures three-phase voltage and failure phase is judged according to the phase and amplitude size of three-phase voltage.Specifically, route which
It is mutually grounded, which phase voltage can reduce or the variation of three-phase phase angle.Fault Phase Selection is routine techniques, is just not explained in detail
.
Step S4, the voltage when failure mutually operates normally is obtainedLine mutual-ground capacitor C0, bleeder resistance R0, therefore
Hinder ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Step S5, voltage when mutually being operated normally according to the failureLine mutual-ground capacitor C0, bleeder resistance R0, therefore
Hinder ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated；
Step S6, by SPWM or SVPWM modulation algorithm, when the cut-offfing of full-bridge circuit thyristor of controllable voltage source is controlled
Between, export the voltage of the controllable voltage source output.
SPWM modulation algorithm be exactly using sine wave as reference wave (modulating wave), with the triangular wave (carrier wave) of a column constant amplitude with
Baseline sinusoidal wave intersection, the switching mode of inverter is determined by intersection point.
SVPWM is the relatively new control method of one kind of developed recently, is six power by three-phase power inverter
The pulse width modulated wave that the particular switch mode of switch element composition generates, can make output current wave be as closely as possible to ideal
Sinusoidal waveform.Space voltage vector PWM is different from traditional sine pulse width modulation (PWM), it is gone out from the overall effect of three-phase output voltage
Hair, how be conceived to makes motor obtain circular ideal magnetic linkage track.SVPWM technology compared with SPWM, winding current waveform
Harmonic components are small, so that motor torque ripple reduces, rotating excitation field more approaches circle, and makes the utilization rate of DC bus-bar voltage
There is large increase, and is more easily implemented digitlization.
The application does not have to consider that arc suppression coil inductance parameters and line mutual-ground capacitor are close by way of accessing voltage source
The state issues of industrial frequency resonance, it is easier to control, energy effective compensation fault current makes fault point blow-out.The application passes through calculating
The phase and amplitude of output voltage is obtained, realizes that current in the fault point extinguishes by the amplitude and phase that control controllable voltage source, protects
Card power network safety operation and fault point do not cause fire, accident of human electric shock.
Further, voltage when mutually being operated normally according to failureLine mutual-ground capacitor C0, bleeder resistance R0,
Fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated
The step of, comprising:
According to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0With the line mutual-ground capacitor C0, meter
It calculates line-to-ground parameter and compensates the parallel impedance Z of inductance parameters1；
Voltage when mutually being operated normally according to the failureFault ground resistance Rf, the controllable voltage source internal resistance r
With the parallel impedance Z of the line-to-ground parameter and compensation inductance parameters1, calculate the voltage of controllable voltage source output.
Further, described according to arc suppression coil inductance L, resistance RL, bleeder resistance R0With line mutual-ground capacitor C0, calculate
The parallel impedance Z of line-to-ground parameter and compensation inductance parameters1, comprising:
Wherein, j is empty step, and ω is angular frequency.
Further, voltage when mutually being operated normally according to failureFault ground resistance Rf, the controllable voltage
The parallel impedance Z of source internal resistance r and the line-to-ground parameter and compensation inductance parameters1, the voltage of controllable voltage source output is calculated,
Include:
Wherein,For the voltage of controllable voltage source output.
Formulation process provided by the present application is as follows:
It is as shown in Figure 2: firstly the need of calculating current in the fault point.According to superposition theorem, only three phase mains list is calculated separately
Current in the fault point when only effect and only controllable voltage source independent role, then sum.
Fig. 3 is the equivalent circuit diagram that fault current is calculated when only three phase mains effect.It is calculated and flows through ground resistance
Electric current If1:
Wherein, r is controllable voltage source internal resistance,Voltage when mutually being operated normally for failure, RfFor fault ground resistance, Z1
For the parallel impedance of line-to-ground parameter and arc suppression coil parameter, specially
Wherein, RLFor arc suppression coil internal resistance, R0For line-to-ground leak resistance.
Fig. 4 is equivalent circuit diagram when there was only controllable voltage source independent role, and the electric current for flowing through ground resistance is calculated
If2:
Therefore total fault current If1For
Make total fault current zero, that is, achievees the purpose that blow-out, then have
Refering to Fig. 5, embodiments herein provides a kind of ground fault arc-control device based on controllable voltage source, packet
It includes:
Measuring unit 101, for continuously measuring three-phase voltage, zero-sequence current and residual voltage；
For detecting whether according to the zero-sequence current and the residual voltage single-phase earthing event occurs for detection unit 102
Barrier；
Judging unit 103, for judging failure according to the three-phase voltage when detecting generation singlephase earth fault
Phase；
Acquiring unit 104, for obtaining the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, leakage
Resistance R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Computing unit 105, voltage when for mutually being operated normally according to the failureLine mutual-ground capacitor C0, leakage
Resistance R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, controllable voltage source output is calculated
Voltage；
Output unit 106, for controlling the full-bridge circuit crystalline substance lock of controllable voltage source by SPWM or SVPWM modulation algorithm
The switch off time of pipe exports the voltage of the controllable voltage source output.
Further, the computing unit 105 includes:
First computation subunit, for according to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0And institute
State line mutual-ground capacitor C0, calculate line-to-ground parameter and compensate the parallel impedance Z of inductance parameters1；
Second computation subunit, voltage when for mutually being operated normally according to the failureFault ground resistance Rf,
The parallel impedance Z of the controllable voltage source internal resistance r and the line-to-ground parameter and compensation inductance parameters1, calculate controllable voltage
The voltage of source output.
From the above technical scheme, the embodiment of the present application provides a kind of ground fault arc extinguishing side based on controllable voltage source
Method and device, which comprises continuously measure three-phase voltage, zero-sequence current and residual voltage；According to the zero-sequence current and
The residual voltage detects whether that singlephase earth fault occurs；When detecting generation singlephase earth fault, according to the three-phase
Voltage judges failure phase；Obtain the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, bleeder resistance R0, therefore
Hinder ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；When mutually being operated normally according to the failure
VoltageLine mutual-ground capacitor C0, bleeder resistance R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLAnd controllable electric
Potential source internal resistance r calculates the voltage of controllable voltage source output；By SPWM or SVPWM modulation algorithm, the complete of controllable voltage source is controlled
The switch off time of bridge circuit thyristor exports the voltage of the controllable voltage source output.The side that the application passes through access voltage source
Formula, without consider arc suppression coil inductance parameters and line mutual-ground capacitor close to industrial frequency resonance state issues, it is easier to control, energy
Effective compensation fault current makes fault point blow-out.The phase and amplitude of output voltage is obtained by calculation in the application, passes through control
The amplitude and phase of controllable voltage source realize that current in the fault point extinguishes, and guarantee that power network safety operation and fault point do not cause fire
Calamity, accident of human electric shock.
Those skilled in the art will readily occur to its of the application after considering specification and practicing application disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (6)
1. a kind of ground fault arc-suppressing method based on controllable voltage source characterized by comprising
Continuous measurement three-phase voltage, zero-sequence current and residual voltage；
According to the zero-sequence current and the residual voltage, detect whether that singlephase earth fault occurs；
When detecting generation singlephase earth fault, failure phase is judged according to the three-phase voltage；
Obtain the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, bleeder resistance R0, fault ground resistance Rf,
Arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Voltage when mutually being operated normally according to the failureLine mutual-ground capacitor C0, bleeder resistance R0, fault ground resistance Rf,
Arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated；
By SPWM or SVPWM modulation algorithm, the switch off time of the full-bridge circuit thyristor of controllable voltage source is controlled, described in output
The voltage of controllable voltage source output.
2. the method according to claim 1, wherein voltage when mutually being operated normally according to failureLine
Road direct-to-ground capacitance C0, bleeder resistance R0, fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r,
The step of calculating the voltage of controllable voltage source output, comprising:
According to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0With the line mutual-ground capacitor C0, calculate line
Road over the ground parameter and compensation inductance parameters parallel impedance Z1；
Voltage when mutually being operated normally according to the failureFault ground resistance Rf, the controllable voltage source internal resistance r and described
The parallel impedance Z of line-to-ground parameter and compensation inductance parameters1, calculate the voltage of controllable voltage source output.
3. according to the method described in claim 2, it is characterized in that, described according to arc suppression coil inductance L, resistance RL, bleeder resistance
R0With line mutual-ground capacitor C0, calculate line-to-ground parameter and compensate the parallel impedance Z of inductance parameters1, comprising:
Wherein, j is empty step, and ω is angular frequency.
4. according to the method described in claim 2, it is characterized in that, voltage when mutually being operated normally according to failureTherefore
Hinder ground resistance Rf, the parallel impedance Z of the controllable voltage source internal resistance r and the line-to-ground parameter and compensation inductance parameters1,
Calculate the voltage of controllable voltage source output, comprising:
Wherein,For the voltage of controllable voltage source output.
5. a kind of ground fault arc-control device based on controllable voltage source characterized by comprising
Measuring unit, for continuously measuring three-phase voltage, zero-sequence current and residual voltage；
For detecting whether according to the zero-sequence current and the residual voltage singlephase earth fault occurs for detection unit；
Judging unit, for judging failure phase according to the three-phase voltage when detecting generation singlephase earth fault；
Acquiring unit, for obtaining the voltage when failure mutually operates normallyLine mutual-ground capacitor C0, bleeder resistance R0,
Fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r；
Computing unit, voltage when for mutually being operated normally according to the failureLine mutual-ground capacitor C0, bleeder resistance R0,
Fault ground resistance Rf, arc suppression coil inductance L, resistance RLWith controllable voltage source internal resistance r, the voltage of controllable voltage source output is calculated；
Output unit, for controlling cut-offfing for the full-bridge circuit thyristor of controllable voltage source by SPWM or SVPWM modulation algorithm
Time exports the voltage of the controllable voltage source output.
6. device according to claim 5, which is characterized in that the computing unit includes:
First computation subunit, for according to the arc suppression coil inductance L, the resistance RL, the bleeder resistance R0With the line
Road direct-to-ground capacitance C0, calculate line-to-ground parameter and compensate the parallel impedance Z of inductance parameters1；
Second computation subunit, voltage when for mutually being operated normally according to the failureFault ground resistance Rf, it is described can
Control the parallel impedance Z of voltage source internal resistance r and the line-to-ground parameter and compensation inductance parameters1, calculate controllable voltage source output
Voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811123691.9A CN109167345B (en) | 2018-09-26 | 2018-09-26 | A kind of ground fault arc-suppressing method and device based on controllable voltage source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811123691.9A CN109167345B (en) | 2018-09-26 | 2018-09-26 | A kind of ground fault arc-suppressing method and device based on controllable voltage source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109167345A CN109167345A (en) | 2019-01-08 |
| CN109167345B true CN109167345B (en) | 2019-12-03 |
Family
ID=64892564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811123691.9A Active CN109167345B (en) | 2018-09-26 | 2018-09-26 | A kind of ground fault arc-suppressing method and device based on controllable voltage source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109167345B (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755933B (en) * | 2019-01-18 | 2020-10-20 | 云南电网有限责任公司电力科学研究院 | Full-compensation analysis simplified loop with compensation inductance and analysis method |
| CN109596937B (en) * | 2019-01-18 | 2020-11-24 | 云南电网有限责任公司电力科学研究院 | Controllable voltage source grounding current compensation method and device |
| CN109490719B (en) * | 2019-01-18 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Simplified circuit and analysis method for full-compensation analysis of earth fault current |
| CN109596938B (en) * | 2019-01-18 | 2020-11-03 | 云南电网有限责任公司电力科学研究院 | Controllable voltage source grounding current tracking compensation method and device |
| CN109599854B (en) * | 2019-01-18 | 2020-03-27 | 云南电网有限责任公司电力科学研究院 | Controllable voltage source ground fault full-compensation circuit and method without inductance compensation |
| CN109802368B (en) * | 2019-01-18 | 2020-03-27 | 云南电网有限责任公司电力科学研究院 | Controllable voltage source ground fault full-compensation circuit with inductance compensation and method |
| CN109507521B (en) * | 2019-01-18 | 2020-10-09 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring grounding current full-compensation output value of controllable voltage source |
| CN109713654B (en) * | 2019-02-13 | 2020-04-07 | 云南电网有限责任公司电力科学研究院 | Distributed flexible ground fault positioning and protecting method based on controllable voltage source |
| CN109818340B (en) * | 2019-02-13 | 2020-06-23 | 云南电网有限责任公司电力科学研究院 | Flexible control method for single-phase grounding fault current under controllable voltage source parallel inductor |
| CN109541382B (en) * | 2019-02-13 | 2020-06-30 | 云南电网有限责任公司电力科学研究院 | Single-phase earth fault current flexible control method and device based on controllable voltage source |
| CN109541383B (en) * | 2019-02-13 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Method and device for positioning and protecting ground fault based on controllable voltage source |
| CN109787199B (en) * | 2019-02-13 | 2020-04-10 | 云南电网有限责任公司电力科学研究院 | Flexible control method for single-phase grounding fault current under non-inductance controllable voltage source |
| CN109950886B (en) * | 2019-04-02 | 2020-04-24 | 云南电网有限责任公司电力科学研究院 | Control method for controllable current source grounding full compensation with inductance compensation |
| CN109921403B (en) * | 2019-04-02 | 2020-11-10 | 云南电网有限责任公司电力科学研究院 | Controllable current source earth fault full compensation method without inductance compensation |
| CN109768538B (en) * | 2019-04-02 | 2020-02-07 | 云南电网有限责任公司电力科学研究院 | Full compensation method and circuit for grounding of parallel controllable current source of arc suppression coil |
| CN109813997B (en) * | 2019-04-02 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Controllable current source grounding current full-compensation output current calculation method and system |
| CN109818344B (en) * | 2019-04-02 | 2020-05-29 | 云南电网有限责任公司电力科学研究院 | Controllable current source earth fault full compensation method with inductance compensation |
| CN110224386B (en) * | 2019-04-30 | 2021-07-16 | 云南电网有限责任公司电力科学研究院 | Single-phase grounding voltage compensation method and single-phase grounding voltage compensation device |
| CN110311380B (en) * | 2019-07-19 | 2023-05-23 | 云南电网有限责任公司电力科学研究院 | Active grounding compensator control method |
| CN110244170B (en) * | 2019-07-19 | 2021-07-13 | 云南电网有限责任公司电力科学研究院 | High-resistance grounding identification method for neutral point ungrounded system |
| CN111505440B (en) * | 2020-04-27 | 2022-09-20 | 云南拓普特种电源科技有限公司 | Ground fault detection and protection system and method based on class D power amplifier |
| CN112260249B (en) * | 2020-10-21 | 2022-11-22 | 西安工程大学 | Flexible arc extinction method for single-phase earth fault of power distribution network |
| CN112769115B (en) * | 2020-11-28 | 2022-04-08 | 国网河南省电力公司电力科学研究院 | Self-adaptive active full-compensation control method for grounding residual current |
| CN114256827B (en) * | 2021-12-17 | 2022-09-16 | 华中科技大学 | Arc extinction method for network-source direct connection system of marine nuclear power platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009273323A (en) * | 2008-05-09 | 2009-11-19 | Chugoku Electric Power Co Inc:The | Control method of ground fault current suppression device of distribution line and ground fault current suppression device of distribution line |
| CN105977947A (en) * | 2015-12-04 | 2016-09-28 | 长沙理工大学 | Power distribution network active arc extinction device and current control method thereof |
| CN106655144A (en) * | 2017-02-13 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Dual-closed-loop control-based active voltage arc extinction method and apparatus for power distribution network in fault |
| CN107785884A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
| CN108448562A (en) * | 2018-05-25 | 2018-08-24 | 云南电网有限责任公司电力科学研究院 | A kind of full compensation method of electric current based on singlephase earth fault and system |
-
2018
- 2018-09-26 CN CN201811123691.9A patent/CN109167345B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009273323A (en) * | 2008-05-09 | 2009-11-19 | Chugoku Electric Power Co Inc:The | Control method of ground fault current suppression device of distribution line and ground fault current suppression device of distribution line |
| CN105977947A (en) * | 2015-12-04 | 2016-09-28 | 长沙理工大学 | Power distribution network active arc extinction device and current control method thereof |
| CN107785884A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | A kind of more level active compensation devices of three-phase four-arm and control method |
| CN106655144A (en) * | 2017-02-13 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Dual-closed-loop control-based active voltage arc extinction method and apparatus for power distribution network in fault |
| CN108448562A (en) * | 2018-05-25 | 2018-08-24 | 云南电网有限责任公司电力科学研究院 | A kind of full compensation method of electric current based on singlephase earth fault and system |
Non-Patent Citations (1)
| Title |
|---|
| 基于寻优控制的配电网单相接地故障有源消弧方法;张健等;《广东电力》;20170228;第30卷(第2期);第129-135页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109167345A (en) | 2019-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109167345B (en) | A kind of ground fault arc-suppressing method and device based on controllable voltage source | |
| CN104218563B (en) | The distribution network failure arc extinguishing method that a kind of neutral point is grounded through Multilevel Inverters | |
| CN109061372A (en) | A kind of controllable voltage source output voltage calculation method that ground fault compensates entirely | |
| RU2416804C2 (en) | Device and method for definition of ground short circuit | |
| CN105322528B (en) | Two point calculating method of Injection Current when small current grounding fault active extinguishing arc | |
| CN108054764A (en) | A kind of multifunctional ligand power grid flexible ground device and control method | |
| CN103116115B (en) | Network-distribution single-phase failure line selection method based on virtual active power increment maximal principle | |
| CN109742727A (en) | A kind of judgment method of low pressure 400V leakage current | |
| CN112769115B (en) | Self-adaptive active full-compensation control method for grounding residual current | |
| CN102508098B (en) | Quick distinguishing method for zero-sequence directional elements of alternating-current and direct-current serial-parallel power grid | |
| CN107979098A (en) | A kind of new mixed topology multifunctional electric power network distribution device and control method | |
| CN109301809A (en) | A kind of active flexible extinguishing arc switching method of novel power distribution network | |
| CN103163433A (en) | Method for monitoring insulation condition of generator stator and power distribution network on line and performing fault line selection | |
| CN207705796U (en) | A kind of multifunctional ligand power grid flexible ground device | |
| Wang et al. | Novel pilot protection for AC transmission line connected to LCC-HVDC inverter station | |
| JP5380702B2 (en) | Leakage current measuring device and measuring method | |
| JP5477020B2 (en) | Leakage current measuring device and measuring method in electrical equipment | |
| CN105866608A (en) | Power distribution network fault line selection method based on unique through-flow characteristic of resistive current | |
| CN104215841B (en) | Island detection method, island detection device, converter and distributed power generation system | |
| CN108599222B (en) | Parameter calculation method for pre-charging current-limiting resistor of modular multilevel converter | |
| CN110261729A (en) | A kind of power distribution network flexible ground control method | |
| CN107968385B (en) | A kind of DC voltage guard method suitable for alternating current-direct current mixing power grid | |
| CN207705795U (en) | A kind of novel mixed topology multifunctional electric power network distribution device | |
| Azevedo et al. | Voltage quality improvement of microgrids under islanding mode | |
| Chen et al. | A pilot directional protection based on low frequency voltage variable quantity for LCC-HVDC transmission lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |