CN108964001A - Arc suppression coil of power distribution network tuning methods, terminal device and system - Google Patents
Arc suppression coil of power distribution network tuning methods, terminal device and system Download PDFInfo
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- CN108964001A CN108964001A CN201810972666.1A CN201810972666A CN108964001A CN 108964001 A CN108964001 A CN 108964001A CN 201810972666 A CN201810972666 A CN 201810972666A CN 108964001 A CN108964001 A CN 108964001A
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- power distribution
- suppression coil
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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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Abstract
The present invention is suitable for distribution network technology field, provides a kind of arc suppression coil of power distribution network tuning methods, terminal device and system, this method comprises: obtaining the neutral point voltage of power distribution network；When the neutral point voltage is greater than the first preset threshold, the capacitance current of the power distribution network is determined；The target coil turn of arc suppression coil is determined according to the neutral point voltage and the capacitance current, and the arc suppression coil is adjusted to the target coil turn.The present invention can be improved tuning precision.
Description
Technical field
The invention belongs to distribution network technology field more particularly to a kind of arc suppression coil of power distribution network tuning methods, terminal device
And system.
Background technique
Power distribution network is the important link during electric system electric energy is sent out, becomes, is defeated, matching, and is connection transmission system and power consumer
Bridge, be directly linked user electric energy safe, quality, in terms of proposed requirement.But with the hair of power grid
It opens up, the increase and lengthening of cable in power distribution network, when singlephase earth fault occurs, capacitance current increases, thus caused arc light
Overvoltage problem is also got worse, and directly threatens the safe and reliable operation of electric system.Currently, generalling use neutral point through disappearing
The earthing mode of arc coil ground connection achievees the purpose that extinguishing arc, and arc suppression coil is when singlephase earth fault occurs for power grid, Neng Gouti
For inductive current, the earthing capacitance current of power distribution network is compensated, achievees the purpose that reduce ground connection residual flow, extinguish electric arc.
Currently, usually manually adjusting arc suppression coil by staff achievees the effect that arc extinguishing, but this method reliability
Low safety.
Summary of the invention
In view of this, the embodiment of the invention provides arc suppression coil of power distribution network tuning methods, terminal device and system, with solution
Certainly staff manually adjusts the low problem of arc suppression coil reliability in the prior art.
The first aspect of the embodiment of the present invention provides a kind of arc suppression coil of power distribution network tuning methods, comprising:
Obtain the neutral point voltage of power distribution network；
When the neutral point voltage is greater than the first preset threshold, the capacitance current of the power distribution network is determined；
The target coil turn of arc suppression coil is determined according to the neutral point voltage and the capacitance current, and is disappeared described
Arc coil is adjusted to the target coil turn.
It is in the first implementation, described to adjust the arc suppression coil to the target coil turn, comprising:
Obtain the corresponding relationship list of the coil turn and gear of the arc suppression coil；
Corresponding with target coil turn target gear is obtained according to the corresponding relationship list, and by the extinguishing arc
Coil is adjusted to the target gear.
In conjunction with the first implementation, in the second implementation, it is described according to the corresponding relationship list obtain with
The corresponding target gear of the target coil turn, comprising:
The absolute difference for obtaining the coil turn and the target coil turn in the corresponding relationship list, will be with institute
The corresponding gear of the smallest coil turn of target coil turn absolute difference is stated as target gear.
It is described that arc suppression coil is determined according to the neutral point voltage and the capacitance current in the third implementation
Target coil turn, comprising:
According to expression formulaOrDetermine the target coil turn
Number N, wherein U0For neutral point voltage, IcFor capacitance current, RdFor the resistance for the damping resistance case being connect with the arc suppression coil
Value；X0For the reactance value of a circle coil in the arc suppression coil.
In the 4th kind of implementation, the capacitance current of the determination power distribution network, comprising:
Obtain the current reactance value X of the arc suppression coilL1, present current value IL1With current phase angle thetaL1；
The coil turn of the arc suppression coil is adjusted to first coil the number of turns, and obtains the arc suppression coil after adjusting and adjusts
Reactance value XL2, adjust current value IL2With adjusting phase angle thetaL2；
According to expression formulaDetermine the capacitance current I of the power distribution networkc, wherein UΦIt is described
The nominal voltage of power distribution network, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil,
In the 5th kind of implementation, further includes:
Obtain the maximum capacitor electric current I of the power distribution networkcmaxWith nominal voltage UΦ；
According to expression formulaDetermine the resistance value R of the damping resistance cased,
In, KC0For the degree of asymmetry of the power distribution network, U0maxFor the maximum neutral point voltage of the power distribution network, U0max=kUΦ, k is to be
Number；
R is set by the resistance value for the damping resistance case connecting with the arc suppression coild。
In the 6th kind of implementation, further includes:
Obtain the three-phase voltage of the power distribution network；
When any phase voltage is less than the second preset threshold in the three-phase voltage, what short circuit was connect with the arc suppression coil
Damping resistance case.
The second aspect of the embodiment of the present invention provides a kind of arc suppression coil of power distribution network tuning terminal device, including storage
Device, processor and storage in the memory and the computer program that can run on the processor, the processor
It realizes when executing the computer program such as the step of first aspect of embodiment of the present invention the method.
The third aspect of the embodiment of the present invention provides a kind of arc suppression coil of power distribution network tuning system, which is characterized in that packet
It includes:
Control module；
Arc suppression coil is connect with power distribution network；
Voltage measurement module, for measuring the voltage of the power network neutral point；
Current measurement module, for measuring the electric current of the arc suppression coil；
Damping resistance case；
The control module respectively with the arc suppression coil, the voltage measurement module, the current measurement module and institute
State the connection of damping resistance case；The arc suppression coil is connect with the current measurement module and the damping resistance case respectively；It is described
Voltage measurement module is connect with the power distribution network.
The control module is for executing such as the step of first aspect of embodiment of the present invention the method.
Existing beneficial effect is the embodiment of the present invention compared with prior art: the embodiment of the present invention passes through in power distribution network
Property point voltage judge whether to need to tune, when needing to tune, determine the capacitance current of power distribution network, and according to neutral point voltage and
Capacitance current determines the target coil turn of arc suppression coil, and arc suppression coil is adjusted to target coil turn, realizes arc suppression coil
Automatic tuning can be improved tuning precision compared with manual tuning, improve reliability, and use manpower and material resources sparingly, guarantee work
Make personnel safety.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram of arc suppression coil of power distribution network tuning system provided in an embodiment of the present invention；
Fig. 2 is the implementation process schematic diagram of arc suppression coil of power distribution network tuning methods provided in an embodiment of the present invention；
Fig. 3 is the implementation process schematic diagram of step S203 provided in an embodiment of the present invention；
Fig. 4 is the implementation process schematic diagram of step S202 provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of arc suppression coil of power distribution network tuner provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of arc suppression coil of power distribution network tuning terminal device provided in an embodiment of the present invention.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
It should be appreciated that ought use in this specification and in the appended claims, term " includes " instruction is described special
Sign, entirety, step, operation, the presence of element and/or component, but be not precluded one or more of the other feature, entirety, step,
Operation, the presence or addition of element, component and/or device set.
It is also understood that herein term as used in this specification merely for the sake of for the purpose of describing particular embodiments and
It is not intended to limit the application.As present specification and it is used in the attached claims, unless context
Other situations are clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
Referring to FIG. 1, Fig. 1 is the schematic diagram for the arc suppression coil of power distribution network tuning system that one embodiment of the invention provides, match
Electric wire netting arc extinguishing coil tuning system 100 includes control module 101, arc suppression coil 102, voltage measurement module 103, current measurement mould
Block 104 and damping resistance case 105.
Arc suppression coil 102 is connect with control module 101, and arc suppression coil 102 is turn-adjusting arc-extinguishing winding, has multistage tap
Tap controls load ratio bridging switch by control module 101 and adjusts the number of turns.Arc suppression coil 102 is connect with the neutral point of power distribution network,
In no neutral ground power distribution network, arc suppression coil 102 is connect by grounding transformer module with power distribution network.Grounding transformer mould
The every phase of block is made of two series connection sub-windings of equal turn numbers.The transformer winding is Z wiring, the low, excitation with zero sequence impedance
The features such as the big, small power consumption of impedance.
Voltage measurement module 103 is voltage transformer, connect respectively with control module 101 and power distribution network connects, without in
Property point ground connection power distribution network in, voltage measurement module 103 is connect by grounding transformer module with power distribution network.Voltage measurement module is used
In measurement power network neutral point voltage, the i.e. voltage of arc suppression coil 102, and the neutral point voltage of measurement is sent to control module
101。
Current measurement module 104 is current transformer, is connected with arc suppression coil 102, for measuring the electricity of arc suppression coil 102
Stream, and the electric current measured is sent to control module 101.
Damping resistance case 105 is connected on the ground side of arc suppression coil 102, humorous for preventing arc suppression coil from occurring when adjusting circle
Vibration, to meet the requirement that neutral point displacement voltage when power grid operates normally is not more than 15% specified phase voltage.Control module 101 exists
When singlephase earth fault occurs, it is quickly shorted damping resistance case 105, prevents damping resistance case 105 from increasing active point in residual flow
Amount and fever, have an adverse effect to the extinguishing of electric arc.
Control module 101 is electric with arc suppression coil 102, voltage measurement module 103, current measurement module 104 and damping respectively
It hinders case 105 to connect, for tuning arc suppression coil 102.Control module 101 can also be connect with human-computer interaction module, man-machine friendship
Mutual module is for showing tuning information.
Referring to FIG. 2, the implementation process that Fig. 2 is the arc suppression coil of power distribution network tuning methods that one embodiment of the invention provides is shown
It is intended to, is applied to control module 101 shown in FIG. 1, method includes the following steps:
Step S201 obtains the neutral point voltage of power distribution network.
In embodiments of the present invention, voltage measurement module is in real time or electric every the neutral point of preset time measurement power distribution network
Pressure, after voltage measurement module measures neutral point voltage, is sent to control module for the neutral point voltage of measurement.Voltage measurement mould
Neutral point voltage is sent to control module by wireless transport module by block, alternatively, voltage measurement module is electrically connected with control module
It connects, neutral point voltage is sent to control module by wire transmission mode by voltage measurement module.
Step S202 determines the capacitance current of the power distribution network when the neutral point voltage is greater than the first preset threshold.
In embodiments of the present invention, it after control module gets neutral point voltage, is compared with the first preset threshold,
In, the first preset threshold is the neutral point voltage value for needing to be tuned, and when neutral point voltage is greater than the first preset threshold, is sentenced
Disconnected to need to tune arc suppression coil, then control module determines the capacitance current of power distribution network.
Step S203 determines the target coil turn of arc suppression coil according to the neutral point voltage and the capacitance current,
And the arc suppression coil is adjusted to the target coil turn.
In embodiments of the present invention, control module determines the score of arc suppression coil according to neutral point voltage and capacitance current
The number of turns is enclosed, and the number of turns of arc suppression coil is adjusted makes the electric current of arc suppression coil supplement capacitance current to target coil turn, realizes
Automatic tuning.
The embodiment of the present invention judges whether to need to tune by the neutral point voltage of power distribution network, when needing to tune, determines
The capacitance current of power distribution network, and determine according to neutral point voltage and capacitance current the target coil turn of arc suppression coil, by extinguishing arc
Coil is adjusted to target coil turn, realizes the automatic tuning of arc suppression coil, compared with manual tuning, can be improved tuning essence
Degree improves reliability, and uses manpower and material resources sparingly, and guarantees worker safety.
In embodiments of the present invention, as shown in figure 3, adjusting the arc suppression coil to the target described in step S203
Coil turn, comprising the following steps:
Step S301 obtains the corresponding relationship list of the coil turn and gear of the arc suppression coil.
In embodiments of the present invention, arc suppression coil has multistage shunting tap, i.e., multistage gear, and different gears corresponds to not
Same coil turn, control module obtain the corresponding relationship list of coil turn and gear.In a kind of implementation, control module
It is connect with human-computer interaction module, which is manually entered by staff by human-computer interaction module, another real
In existing mode, the corresponding relationship list of the coil turn and gear of a variety of arc suppression coils is stored in memory, control module obtains
The identification information of arc suppression coil is searched from memory according to the identification information and obtains corresponding corresponding relationship list, wherein
The identification information is the title or identification number of arc suppression coil.
Step S302 obtains target gear corresponding with the target coil turn according to the corresponding relationship list, and
The arc suppression coil is adjusted to the target gear.
In embodiments of the present invention, control module obtains mesh from the corresponding relationship list according to target coil turn
Gear is marked, and the load ratio bridging switch for controlling arc suppression coil adjusts arc suppression coil to target gear.
As an embodiment of the present invention, in step S302, it is described according to the corresponding relationship list obtain with it is described
The corresponding target gear of target coil turn, comprising: obtain the coil turn and the score in the corresponding relationship list
The absolute difference for enclosing the number of turns, will gear conduct corresponding with the smallest coil turn of target coil turn absolute difference
Target gear.
In embodiments of the present invention, control module calculates each coil turn and target coil turn in corresponding relationship list
Several absolute difference, and absolute difference is ranked up, selects the smallest absolute difference, and using corresponding gear as
Target gear.
As an embodiment of the present invention, described according to the neutral point voltage and capacitor electricity in step S203
Flow the target coil turn for determining arc suppression coil, comprising:
According to expression formulaOrDetermine the target coil turn
Number N, wherein U0For neutral point voltage, IcFor capacitance current, RdFor the resistance for the damping resistance case being connect with the arc suppression coil
Value；X0For the reactance value of a circle coil in the arc suppression coil.
As an embodiment of the present invention, referring to FIG. 4, determining the capacitor electricity of the power distribution network described in step S202
Stream, comprising the following steps:
Step S401 obtains the current reactance value X of the arc suppression coilL1, present current value IL1With current phase angle thetaL1。
In embodiments of the present invention, the coil turn that the arc suppression coil is currently accessed power distribution network is obtained, according to currently connecing
The coil turn entered determines current reactance value XL1, the present current value I of arc suppression coil is measured by current measurement moduleL1, currently
Phase angle thetaL1It can be the voltage phase angle measured by voltage measurement module, or the electric current phase that current measurement module measures
Angle.
The coil turn of the arc suppression coil is adjusted to first coil the number of turns by step S402, and obtains disappearing after adjusting
Arc coil adjusts reactance value XL2, adjust current value IL2With adjusting phase angle thetaL2。
In embodiments of the present invention, control module controls load ratio bridging switch, is at random adjusted to the number of turns of arc suppression coil
First coil the number of turns, to change the inductance of arc suppression coil.It is determined according to first coil the number of turns and adjusts reactance value XL2, surveyed by electric current
Measure the adjusting current value I of module measurement arc suppression coilL2, in current phase angle thetaL1When for voltage phase angle, phase angle theta is adjustedL2To pass through electricity
The voltage phase angle that pressure measurement module measures, in current phase angle thetaL1When for current phase angle, phase angle theta is adjustedL2To pass through current measurement mould
The current phase angle that block measures.
Step S403, according to expression formulaDetermine the capacitance current I of the power distribution networkc.Wherein,
UΦFor the nominal voltage of the power distribution network, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil,
As an embodiment of the present invention, this method further include: obtain the maximum capacitor electric current I of the power distribution networkcmax
With nominal voltage UΦ；According to expression formulaDetermine the resistance value of the damping resistance case
Rd, wherein KC0For the degree of asymmetry of the power distribution network, U0maxFor the maximum neutral point voltage of the power distribution network, U0max=kUΦ, k
For coefficient；R is set by the resistance value for the damping resistance case connecting with the arc suppression coild。
In embodiments of the present invention, staff passes through human-computer interaction module for the maximum capacitor electric current I of power distribution networkcmaxWith
Nominal voltage UΦIt is input to control module.The degree of asymmetry of power distribution network can be 2.5%.The maximum neutral point voltage of power distribution network
U0max=kUΦ, k can be 15%.The resistance value R of damping resistance case is calculated in control moduledAfterwards, by the electricity of damping resistance case
Resistance value is adjusted to Rd。
As an embodiment of the present invention, this method further include: obtain the three-phase voltage of the power distribution network；Described three
When any phase voltage is less than the second preset threshold in phase voltage, it is shorted the damping resistance case connecting with the arc suppression coil.
In embodiments of the present invention, the second preset threshold is for judging whether power distribution network singlephase earth fault occurs, three
Have in phase voltage and when only a phase voltage is less than the second preset threshold, singlephase earth fault occurs in judgement, then control module is logical
Adopt relay shorts damping resistance case, damping resistance case is made to exit work.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present invention constitutes any limit
It is fixed.
Referring to FIG. 5, Fig. 5 is the schematic diagram for the arc suppression coil of power distribution network tuner that one embodiment of the invention provides, match
Electric wire netting arc extinguishing coil tuning device includes acquiring unit 501, determination unit 502 and adjusts unit 503, and each unit function is as follows:
Acquiring unit 501, for obtaining the neutral point voltage of power distribution network；
Determination unit 502, for determining the electricity of the power distribution network when the neutral point voltage is greater than the first preset threshold
Capacitance current；
Unit 503 is adjusted, for determining the score of arc suppression coil according to the neutral point voltage and the capacitance current
The number of turns is enclosed, and the arc suppression coil is adjusted to the target coil turn.
As an embodiment of the present invention, unit 503 is adjusted, for obtaining the coil turn and shelves of the arc suppression coil
The corresponding relationship list of position；
Corresponding with target coil turn target gear is obtained according to the corresponding relationship list, and by the extinguishing arc
Coil is adjusted to the target gear.
As an embodiment of the present invention, unit 503 is adjusted, for obtaining the coil turn in the corresponding relationship list
Several absolute differences with the target coil turn, will be with the smallest coil turn of target coil turn absolute difference
Corresponding gear is as target gear.
As an embodiment of the present invention, unit 503 is adjusted, for according to expression formula
OrDetermine the target turn number N, wherein U0For neutral point voltage, IcFor capacitance current,
RdFor the resistance value for the damping resistance case being connect with the arc suppression coil；X0For the reactance value of a circle coil in the arc suppression coil.
As an embodiment of the present invention, determination unit 502, for obtaining the current reactance value of the arc suppression coil
XL1, present current value IL1With current phase angle thetaL1；
The coil turn of the arc suppression coil is adjusted to first coil the number of turns, and obtains the arc suppression coil after adjusting and adjusts
Reactance value XL2, adjust current value IL2With adjusting phase angle thetaL2；
According to expression formulaDetermine the capacitance current I of the power distribution networkc, wherein UΦIt is described
The nominal voltage of power distribution network, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil,
As an embodiment of the present invention, unit 503 is adjusted, is also used to obtain the maximum capacitor electric current of the power distribution network
IcmaxWith nominal voltage UΦ；
According to expression formulaDetermine the resistance value R of the damping resistance cased,
In, KC0For the degree of asymmetry of the power distribution network, U0maxFor the maximum neutral point voltage of the power distribution network, U0max=kUΦ, k is to be
Number；
R is set by the resistance value for the damping resistance case connecting with the arc suppression coild。
It as an embodiment of the present invention, further include short circuit module, for obtaining the three-phase voltage of the power distribution network；
When any phase voltage is less than the second preset threshold in the three-phase voltage, what short circuit was connect with the arc suppression coil
Damping resistance case.
The embodiment of the present invention judges whether to need to tune by the neutral point voltage of power distribution network, when needing to tune, determines
The capacitance current of power distribution network, and determine according to neutral point voltage and capacitance current the target coil turn of arc suppression coil, by extinguishing arc
Coil is adjusted to target coil turn, realizes the automatic tuning of arc suppression coil, compared with manual tuning, can be improved tuning essence
Degree improves reliability, and uses manpower and material resources sparingly, and guarantees worker safety.
Fig. 6 is the schematic diagram for the arc suppression coil of power distribution network tuning terminal device that one embodiment of the invention provides.Such as Fig. 6 institute
Show, the arc suppression coil of power distribution network tuning terminal device 600 of the embodiment includes: processor 601, memory 602 and is stored in
In the memory 602 and the computer program 603 that can be run on the processor 601.The processor 601 executes described
The step in above-mentioned each arc suppression coil of power distribution network tuning methods embodiment is realized when computer program 603, such as shown in FIG. 1
Step S101 to S103.Alternatively, the processor 601 realizes above-mentioned each Installation practice when executing the computer program 603
In each module/unit function, such as the function of unit 501 to 503 shown in Fig. 5.
Illustratively, the computer program 603 can be divided into one or more module/units, it is one or
Multiple module/the units of person are stored in the memory 602, and are executed by the processor 601, to complete the present invention.Institute
Stating one or more module/units can be the series of computation machine program instruction section that can complete specific function, the instruction segment
For describing implementation procedure of the computer program 603 in arc suppression coil of power distribution network tuning terminal device 600.Example
Such as, the computer program 603 can be divided into acquiring unit, determination unit and adjust unit, and each unit function is as follows:
Acquiring unit, for obtaining the neutral point voltage of power distribution network；
Determination unit, for determining the capacitor of the power distribution network when the neutral point voltage is greater than the first preset threshold
Electric current；
Unit is adjusted, for determining the target coil turn of arc suppression coil according to the neutral point voltage and the capacitance current
Number, and the arc suppression coil is adjusted to the target coil turn.
As an embodiment of the present invention, unit is adjusted, for obtaining the coil turn and gear of the arc suppression coil
Corresponding relationship list；
Corresponding with target coil turn target gear is obtained according to the corresponding relationship list, and by the extinguishing arc
Coil is adjusted to the target gear.
As an embodiment of the present invention, unit is adjusted, for obtaining the coil turn in the corresponding relationship list
It, will be with the smallest coil turn pair of target coil turn absolute difference with the absolute difference of the target coil turn
The gear answered is as target gear.
As an embodiment of the present invention, unit is adjusted, for according to expression formulaOrDetermine the target turn number N, wherein U0For neutral point voltage, IcFor capacitance current, RdFor
The resistance value for the damping resistance case being connect with the arc suppression coil；X0For the reactance value of a circle coil in the arc suppression coil.
As an embodiment of the present invention, determination unit, for obtaining the current reactance value X of the arc suppression coilL1, when
Preceding current value IL1With current phase angle thetaL1；
The coil turn of the arc suppression coil is adjusted to first coil the number of turns, and obtains the arc suppression coil after adjusting and adjusts
Reactance value XL2, adjust current value IL2With adjusting phase angle thetaL2；
According to expression formulaDetermine the capacitance current I of the power distribution networkc, wherein UΦIt is described
The nominal voltage of power distribution network, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil,
As an embodiment of the present invention, unit is adjusted, is also used to obtain the maximum capacitor electric current of the power distribution network
IcmaxWith nominal voltage UΦ；
According to expression formulaDetermine the resistance value R of the damping resistance cased,
In, KC0For the degree of asymmetry of the power distribution network, U0maxFor the maximum neutral point voltage of the power distribution network, U0max=kUΦ, k is to be
Number；
R is set by the resistance value for the damping resistance case connecting with the arc suppression coild。
It as an embodiment of the present invention, further include short circuit module, for obtaining the three-phase voltage of the power distribution network；
When any phase voltage is less than the second preset threshold in the three-phase voltage, what short circuit was connect with the arc suppression coil
Damping resistance case.
Arc suppression coil of power distribution network tuning terminal device 600 can be desktop PC, notebook, palm PC and
Cloud server etc. calculates equipment.The arc suppression coil of power distribution network tuning terminal device may include, but be not limited only to, processor
601, memory 602.It will be understood by those skilled in the art that Fig. 6 is only arc suppression coil of power distribution network tuning terminal device 600
Example does not constitute the restriction to arc suppression coil of power distribution network tuning terminal device 600, may include more more or fewer than illustrating
Component, perhaps combines certain components or different components, such as arc suppression coil of power distribution network tuning terminal device can be with
Including input-output equipment, network access equipment, bus etc..
Alleged processor 601 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng.
The memory 602 can be the internal storage unit of the arc suppression coil of power distribution network tuning terminal device 600, example
Such as the hard disk or memory of arc suppression coil of power distribution network tuning terminal device 600.The memory 602 is also possible to the power distribution network and disappears
Arc coil tunes matches on the External memory equipment of terminal device 600, such as arc suppression coil of power distribution network tuning terminal device 600
Standby plug-in type hard disk, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD)
Card, flash card (Flash Card) etc..Further, the memory 602 can also both include the arc suppression coil of power distribution network
The internal storage unit for tuning terminal device 600 also includes External memory equipment.The memory 602 is for storing the calculating
Other programs and data needed for machine program and arc suppression coil of power distribution network tuning terminal device.The memory 602 is also
It can be used for temporarily storing the data that has exported or will export.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method, it can be with
It realizes by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of logical function partition, there may be another division manner in actual implementation, such as
Multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Separately
A bit, shown or discussed mutual coupling or direct-coupling or communication connection can be through some interfaces, device
Or the INDIRECT COUPLING or communication connection of unit, it can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic that can carry the computer program code
Dish, CD, computer storage, read-only memory (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium includes can carry out increasing appropriate according to the requirement made laws in jurisdiction with patent practice
Subtract, such as does not include electric carrier signal and electricity according to legislation and patent practice, computer-readable medium in certain jurisdictions
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of arc suppression coil of power distribution network tuning methods characterized by comprising
Obtain the neutral point voltage of power distribution network；
When the neutral point voltage is greater than the first preset threshold, the capacitance current of the power distribution network is determined；
Determine the target coil turn of arc suppression coil according to the neutral point voltage and the capacitance current, and by the arc blowout wire
Circle, which is adjusted, arrives the target coil turn.
2. arc suppression coil of power distribution network tuning methods as described in claim 1, which is characterized in that described by the arc suppression coil tune
Save the target coil turn, comprising:
Obtain the corresponding relationship list of the coil turn and gear of the arc suppression coil；
Corresponding with target coil turn target gear is obtained according to the corresponding relationship list, and by the arc suppression coil
Adjust the target gear.
3. arc suppression coil of power distribution network tuning methods as claimed in claim 2, which is characterized in that described according to the corresponding relationship
List obtains target gear corresponding with the target coil turn, comprising:
The absolute difference for obtaining the coil turn and the target coil turn in the corresponding relationship list, will be with the mesh
The corresponding gear of the smallest coil turn of coil turn absolute difference is marked as target gear.
4. arc suppression coil of power distribution network tuning methods as described in claim 1, which is characterized in that described according to the neutral point electricity
Pressure and the capacitance current determine the target coil turn of arc suppression coil, comprising:
According to expression formulaOrDetermine the target turn number N,
Wherein, U0For neutral point voltage, IcFor capacitance current, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil；X0
For the reactance value of a circle coil in the arc suppression coil.
5. arc suppression coil of power distribution network tuning methods as described in claim 1, which is characterized in that the determination power distribution network
Capacitance current, comprising:
Obtain the current reactance value X of the arc suppression coilL1, present current value IL1With current phase angle thetaL1；
The coil turn of the arc suppression coil is adjusted to first coil the number of turns, and obtains the arc suppression coil after adjusting and adjusts reactance
Value XL2, adjust current value IL2With adjusting phase angle thetaL2；
According to expression formulaDetermine the capacitance current I of the power distribution networkc, wherein UΦFor the power distribution network
Nominal voltage, RdFor the resistance value for the damping resistance case being connect with the arc suppression coil,
6. arc suppression coil of power distribution network tuning methods as described in claim 1, which is characterized in that further include:
Obtain the maximum capacitor electric current I of the power distribution networkcmaxWith nominal voltage UΦ；
According to expression formulaDetermine the resistance value R of the damping resistance cased, wherein KC0
For the degree of asymmetry of the power distribution network, U0maxFor the maximum neutral point voltage of the power distribution network, U0max=kUΦ, k is coefficient；
R is set by the resistance value for the damping resistance case connecting with the arc suppression coild。
7. arc suppression coil of power distribution network tuning methods as described in claim 1, which is characterized in that further include:
Obtain the three-phase voltage of the power distribution network；
When any phase voltage is less than the second preset threshold in the three-phase voltage, it is shorted the damping connecting with the arc suppression coil
Resistance box.
8. a kind of arc suppression coil of power distribution network tunes terminal device, including memory, processor and storage are in the memory
And the computer program that can be run on the processor, which is characterized in that when the processor executes the computer program
It realizes such as the step of any one of claim 1 to 7 the method.
9. a kind of arc suppression coil of power distribution network tunes system characterized by comprising
Control module；
Arc suppression coil is connect with power distribution network；
Voltage measurement module, for measuring the voltage of the power network neutral point；
Current measurement module, for measuring the electric current of the arc suppression coil；
Damping resistance case；
The control module respectively with the arc suppression coil, the voltage measurement module, the current measurement module and the resistance
The connection of buffer resistance case；The arc suppression coil is connect with the current measurement module and the damping resistance case respectively；The voltage
Measurement module is connect with the power distribution network.
The control module is for executing such as the step of any one of claim 1 to 7 the method.
10. arc suppression coil of power distribution network as claimed in claim 9 tunes system, which is characterized in that further include:
Grounding transformer module, the arc suppression coil and the voltage measurement module respectively by the grounding transformer module with
The power distribution network connection.
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| CN201810972666.1A CN108964001B (en) | 2018-08-24 | 2018-08-24 | Power distribution network arc suppression coil tuning method, terminal equipment and system |
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| CN201810972666.1A CN108964001B (en) | 2018-08-24 | 2018-08-24 | Power distribution network arc suppression coil tuning method, terminal equipment and system |
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|---|---|---|---|---|
| CN203674711U (en) * | 2013-12-31 | 2014-06-25 | 国家电网公司 | Automatic tracking and compensating device for arc-suppression coil of power distribution network |
| CN104730414A (en) * | 2015-01-28 | 2015-06-24 | 合肥天海电气技术有限公司 | Circuit selecting device and method for single-phase grounding of resonance grounding system |
| CN104901299A (en) * | 2015-06-19 | 2015-09-09 | 安徽马尼特合开电器有限公司 | Resonant grounding system automatic tracking and compensating device and method |
| CN107611958A (en) * | 2017-08-11 | 2018-01-19 | 国网新源水电有限公司新安江水力发电厂 | Automatic tracking and compensating arc distinction system for generator neutral point |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203674711U (en) * | 2013-12-31 | 2014-06-25 | 国家电网公司 | Automatic tracking and compensating device for arc-suppression coil of power distribution network |
| CN104730414A (en) * | 2015-01-28 | 2015-06-24 | 合肥天海电气技术有限公司 | Circuit selecting device and method for single-phase grounding of resonance grounding system |
| CN104901299A (en) * | 2015-06-19 | 2015-09-09 | 安徽马尼特合开电器有限公司 | Resonant grounding system automatic tracking and compensating device and method |
| CN107611958A (en) * | 2017-08-11 | 2018-01-19 | 国网新源水电有限公司新安江水力发电厂 | Automatic tracking and compensating arc distinction system for generator neutral point |
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| CN108964001B (en) | 2020-04-21 |
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Application publication date: 20181207 Assignee: BAODING HUACHUANG ELECTRIC Co.,Ltd. Assignor: STATE GRID HEBEI ENERGY TECHNOLOGY SERVICE Co.,Ltd. Contract record no.: X2021130000003 Denomination of invention: Tuning method, terminal equipment and system of arc suppression coil in distribution network Granted publication date: 20200421 License type: Common License Record date: 20210305 |