CN109510168A - Mode of connection, the apparatus and system of voltage transformer - Google Patents
Mode of connection, the apparatus and system of voltage transformer Download PDFInfo
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- CN109510168A CN109510168A CN201811559890.4A CN201811559890A CN109510168A CN 109510168 A CN109510168 A CN 109510168A CN 201811559890 A CN201811559890 A CN 201811559890A CN 109510168 A CN109510168 A CN 109510168A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/05—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for capacitive voltage transformers, e.g. against resonant conditions
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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
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
- H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves
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- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of mode of connection of voltage transformer, apparatus and system.Wherein, this method comprises: the neutral point of the primary side of threephase potential transformer is grounded through zero sequential potential transformer；It is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs；Target resistance is concatenated through above-mentioned remaining winding, wherein, the value size of circulation value of the resistance value of above-mentioned target resistance for determining silent triangle above-mentioned when above-mentioned singlephase earth fault occurs, above-mentioned circulation value are less than or equal to the capability value of the secondary side of above-mentioned threephase potential transformer.The present invention solves the technical problem that the existing 4PT mode of connection inhibits the effect of ferromagnetic resonance failure poor.
Description
Technical field
The present invention relates to distribution network technology field, in particular to a kind of mode of connection of voltage transformer, device and
System.
Background technique
The method of operation of neutral point in electric power system includes the following three types: earth-free, be directly grounded and through grounding through arc.
6kV-35kV power distribution network much uses the method for operation of isolated neutral, and under the method for operation, system can failure fortune with ground
Row a period of time, operations staff can be found out faulty line and be cut off using a variety of methods during this period, restore system
It operates normally.
System improves the reliability of power supply with singlephase earth fault operation, but its intrinsic drawback is that single-phase connect occurs
The voltage of non-faulting phase is upgraded to line voltage by phase voltage behind ground, improves the insulating requirements of power distribution network；More seriously failure
After disappearance, the charge of full phase loses voltage support, and electromagnetic potential mutual inductance can only be passed through during reverting to phase voltage
The neutral point of device flows into the earth, should easily cause voltage transformer iron core to be saturated in the process, causes power grid to occur serious ferromagnetic humorous
Vibration, and then biggish dash current occur, burn the insurance of electromagnetic potential transformer primary side concatenation or even damage electromagnetic type
Voltage transformer.
There is also inhibit ferromagnetic resonance event with 4PT (voltage transformer) mode of connection in 6kV-35kV power distribution network at present
Barrier, existing 4PT wiring diagram is as shown in Figure 1, still, system uses 4PT wiring after singlephase earth fault occurs in actual conditions
The failure rate of high-pressure side insurance of electromagnetic potential transformer remain unchanged very high, do not reach and to inhibit ferromagnetic resonance well
Effect, therefore, it is necessary to improve to the existing 4PT mode of connection.
For above-mentioned problem, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of mode of connection of voltage transformer, apparatus and system, existing at least to solve
The 4PT mode of connection inhibit the poor technical problem of effect of ferromagnetic resonance failure.
According to an aspect of an embodiment of the present invention, a kind of mode of connection of voltage transformer is provided, comprising: by three-phase
The neutral point of the primary side of voltage transformer is grounded through zero sequential potential transformer；By the corresponding residue of above-mentioned threephase potential transformer
Winding is shorted to form silent triangle, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is used
In generating residual voltage when singlephase earth fault occurs；Target resistance is concatenated through above-mentioned remaining winding, wherein above-mentioned target electricity
The value size of circulation value of the resistance value of resistance for determining silent triangle above-mentioned when above-mentioned singlephase earth fault occurs, on
State capability value of the circulation value less than or equal to the secondary side of above-mentioned threephase potential transformer.
Further, before through above-mentioned remaining winding concatenation target resistance, the above method further include: predefine above-mentioned mesh
Mark the resistance value of resistance, wherein the resistance value of above-mentioned target resistance is also used to before above-mentioned singlephase earth fault occurs or occurs
After above-mentioned singlephase earth fault, the value size of the circulation value of above-mentioned silent triangle is determined.
Further, in the case where the resistance value of above-mentioned target resistance is first resistor value, above-mentioned silent triangle is determined
The circulation value of shape is the first load current value, wherein above-mentioned first resistor value is inversely proportional with above-mentioned first load current value；And
In the case that the resistance value of above-mentioned target resistance is first resistor value, determine that the measurement voltage of above-mentioned zero sequential potential transformer is the
One voltage value.
Further, the value range of above-mentioned first resistor value is 60 Ω to 100 Ω；Above-mentioned first load current value takes
Being worth range is 0 to 1.5A, and the value range of above-mentioned the first voltage value is 75V to 100V.
According to another aspect of an embodiment of the present invention, a kind of wiring system of voltage transformer is additionally provided, comprising: three-phase
Voltage transformer, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is used for single-phase in generation
Residual voltage is generated when ground fault；Three above-mentioned remaining windings, for forming silent triangle by way of short circuit,
In, target resistance is concatenated through an above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance is above-mentioned in generation for determining
The value size of the circulation value of above-mentioned silent triangle when singlephase earth fault, above-mentioned circulation value are less than or equal to above-mentioned three-phase electricity
Press the capability value of the secondary side of mutual inductor.
Further, above system further include: zero sequential potential transformer is connect with above-mentioned threephase potential transformer, wherein
The neutral point of the primary side of above-mentioned threephase potential transformer is grounded through above-mentioned zero sequential potential transformer.
Further, the resistance value of above-mentioned target resistance is also used to before above-mentioned singlephase earth fault occurs or occurs above-mentioned
After singlephase earth fault, the value size of the circulation value of above-mentioned silent triangle is determined.
Further, in the case where the resistance value of above-mentioned target resistance is first resistor value, above-mentioned silent triangle is determined
The circulation value of shape is the first load current value, wherein above-mentioned first resistor value is inversely proportional with above-mentioned first load current value；And
In the case that the resistance value of above-mentioned target resistance is first resistor value, determine that the measurement voltage of above-mentioned zero sequential potential transformer is the
One voltage value.
Further, the value range of above-mentioned first resistor value is 60 Ω to 100 Ω；Above-mentioned first load current value takes
Being worth range is 0 to 1.5A, and the value range of above-mentioned the first voltage value is 75V to 100V.
According to another aspect of an embodiment of the present invention, a kind of termination of voltage transformer is additionally provided, comprising: first
Processing module, for the neutral point of the primary side of threephase potential transformer to be grounded through zero sequential potential transformer；Second processing mould
Block, for being shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein each single-phase voltage
A remaining winding is arranged in mutual inductor, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs；Concatenation
Module, for concatenating target resistance through above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance is for determining in generation
The value size of the circulation value of above-mentioned silent triangle when singlephase earth fault is stated, above-mentioned circulation value is less than or equal to above-mentioned three-phase
The capability value of the secondary side of voltage transformer.
According to another aspect of an embodiment of the present invention, a kind of storage medium is additionally provided, above-mentioned storage medium includes storage
Program, wherein above procedure operation when control above-mentioned storage medium where equipment execute any one it is above-mentioned voltage it is mutual
The mode of connection of sensor.
According to another aspect of an embodiment of the present invention, a kind of processor is additionally provided, above-mentioned processor is used to run program,
Wherein, the mode of connection of the above-mentioned voltage transformer of any one is executed when above procedure is run.
In embodiments of the present invention, by by the neutral point of the primary side of threephase potential transformer through zero sequential potential transformer
Ground connection；It is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein each single-phase voltage is mutual
A remaining winding is arranged in sensor, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs；Through above-mentioned
Remaining winding concatenates target resistance, wherein for determining above-mentioned singlephase earth fault is occurring for the resistance value of above-mentioned target resistance
The value size of the circulation value of the silent triangle of Shi Shangshu, above-mentioned circulation value are less than or equal to the two of above-mentioned threephase potential transformer
The capability value of secondary side has achieved the purpose that improve inhibition ferromagnetic resonance failure effect, has increased the reliable of power distribution network to realize
Property, the technical effect of the maintenance replacement cost of the frequent failure in the high-pressure side of voltage transformer is avoided, and then solve existing 4PT
The technical problem that the mode of connection inhibits the effect of ferromagnetic resonance failure poor.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of the 4PT mode of connection according to prior art；
Fig. 2 is a kind of flow chart of the mode of connection of voltage transformer according to an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of the connection principle of optional voltage transformer according to an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the mode of connection of optional voltage transformer according to an embodiment of the present invention；
Fig. 5 a is the relationship song of a kind of optional first resistor value according to an embodiment of the present invention and the first load current value
Line chart；
Fig. 5 b is the graph of relation of a kind of optional first resistor value and the first voltage value according to an embodiment of the present invention；
And
Fig. 6 is a kind of structural schematic diagram of the termination of voltage transformer according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Firstly, understand the embodiment of the present invention for convenience, below will to part term involved in the present invention or noun into
Row illustrates:
Remaining winding: a winding of single-phase potential transformer, in the three-phase mutual inductor of 3 single-phase transformers composition,
Each mutual inductor is somebody's turn to do around open-delta is grouped into, for generating residual voltage under ground-fault condition.
Embodiment 1
According to embodiments of the present invention, a kind of embodiment of the mode of connection of voltage transformer is provided, it should be noted that
Step shown in the flowchart of the accompanying drawings can execute in a computer system such as a set of computer executable instructions, and
It, in some cases, can be to be different from sequence execution institute herein and although logical order is shown in flow charts
The step of showing or describing.
Fig. 2 is a kind of flow chart of the mode of connection of voltage transformer according to an embodiment of the present invention, as shown in Fig. 2, should
Method includes the following steps:
The neutral point of the primary side of threephase potential transformer is grounded by step S102 through zero sequential potential transformer；
Step S104 is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein every
A remaining winding is arranged in a single-phase potential transformer, and above-mentioned residue winding is used to generate when singlephase earth fault occurs remaining
Voltage；
Step S106 concatenates target resistance through above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance is for determining
The value size of the circulation value of above-mentioned silent triangle when above-mentioned singlephase earth fault occurs, above-mentioned circulation value are less than or equal to
The capability value of the secondary side of above-mentioned threephase potential transformer.
It should be noted that the embodiment of the mode of connection for the voltage transformer that the embodiment of the present application is improved, can with but
It is not limited to be applied in 6kV-35kV distribution network system, in a manner of solving existing 4PT wiring and inhibit ferromagnetic resonance failure not
The problem of capable of inhibiting rate of breakdown well, avoids and draws since singlephase earth fault occurs for 6kV-35kV distribution network system
The case where electricity electromagnetic type voltage transformer on high-tension side insurance frequent melting fault.
Optionally, in the embodiment of the present application, above-mentioned threephase potential transformer and above-mentioned zero sequential potential transformer constitute electricity
Electromagnetic type voltage transformer, i.e. 4PT.
Optionally, it is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, and through above-mentioned
Remaining winding concatenates target resistance, rather than above-mentioned target resistance is directly shorted on threephase potential transformer, and above-mentioned mesh is arranged
The schematic diagram of mark resistance R can be, but not limited to be as shown in Figure 3, also, be different from existing 4PT wiring as shown in Figure 1
Mode, the improved 4PT mode of connection in the embodiment of the present application are as shown in Figure 4.
It should be noted that the content being not described in detail in the description of the present application belongs to professional and technical personnel in the field
The well known prior art, for example, for undefined part in Fig. 3 to 4, it is identical as implementation in the prior art, in Fig. 4
With part identical in Fig. 1, it is subject to implementation in the prior art.
Also, by the resistance value for determining sizeable above-mentioned target resistance, it can determine and above-mentioned single-phase connect is occurring
The value size of the circulation value of above-mentioned silent triangle when earth fault, in turn, by the control of above-mentioned circulation value less than or equal to upper
In the range of the capability value for stating the secondary side of threephase potential transformer.
The embodiment of the mode of connection of above-mentioned voltage transformer provided herein, transformation convenience simple with principle,
The features such as resistance parameter selection is reasonable, reduces the circulation of silent triangle in the 4PT wiring due to caused by singlephase earth fault
Incidence excessive and more than PT secondary side capacity, increases the reliability of power distribution network, avoids the high-pressure side of voltage transformer
The maintenance replacement cost of frequent failure, has saved a large amount of human and material resources, financial resources, improves work efficiency and working effect.
In embodiments of the present invention, by by the neutral point of the primary side of threephase potential transformer through zero sequential potential transformer
Ground connection；It is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein each single-phase voltage is mutual
A remaining winding is arranged in sensor, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs；Through above-mentioned
Remaining winding concatenates target resistance, wherein for determining above-mentioned singlephase earth fault is occurring for the resistance value of above-mentioned target resistance
The value size of the circulation value of the silent triangle of Shi Shangshu, above-mentioned circulation value are less than or equal to the two of above-mentioned threephase potential transformer
The capability value of secondary side has achieved the purpose that improve inhibition ferromagnetic resonance failure effect, has increased the reliable of power distribution network to realize
Property, the technical effect of the maintenance replacement cost of the frequent failure in the high-pressure side of voltage transformer is avoided, and then solve existing 4PT
The technical problem that the mode of connection inhibits the effect of ferromagnetic resonance failure poor.
In an alternative embodiment, before through above-mentioned remaining winding concatenation target resistance, the above method further include:
Step S302 predefines the resistance value of above-mentioned target resistance, wherein the resistance value of above-mentioned target resistance is also used to
Before above-mentioned singlephase earth fault occurs or after above-mentioned singlephase earth fault occurs, the circulation value of above-mentioned silent triangle is determined
Value size.
In an alternative embodiment, it in the case where the resistance value of above-mentioned target resistance is first resistor value, determines
The circulation value of above-mentioned silent triangle is the first load current value, wherein above-mentioned first resistor value and above-mentioned first rated current
Value is inversely proportional；And in the case where the resistance value of above-mentioned target resistance is first resistor value, above-mentioned zero sequential potential transformer is determined
Measurement voltage be the first voltage value.
It should be noted that obtaining the residual voltage of secondary relay protection by the secondary winding of zero sequential potential transformer
Value, in normal state, the connect zero sequence resistance of zero sequential potential transformer does not consume energy, and only in distribution network system, there are zero sequences
It works when component of voltage, therefore, above-mentioned first resistor value is inversely proportional with above-mentioned first load current value, and first resistor value is bigger
Then the first load current value is smaller.
In an alternative embodiment, the value range of above-mentioned first resistor value is 60 Ω to 100 Ω；Above-mentioned first volume
The value range of constant current value is 0 to 1.5A, and the value range of above-mentioned the first voltage value is 75V to 100V.
In the embodiment of the present application, above-mentioned first resistor is worth partial pressure that is excessive and can reducing zero sequential potential transformer, influences
To the monitoring effect of singlephase earth fault.
In direct-to-ground capacitance C0=0.1 μ f, 1 μ F, 10 μ F, R value 0-100 Ω simulation result in, as shown in Figure 5 a, when upper
When stating first resistor value greater than 60 Ω, corresponding above-mentioned first volume of the open-delta of 10 μ F (capacitance current 30A) of direct-to-ground capacitance
Constant current value is limited in rated current 1.5A or less.As shown in Figure 5 b, in above-mentioned simulation result, above-mentioned first resistor value pair
The influence very little of the first voltage value (zero sequence measurement voltage value), the first voltage value U0Value in 80V top/bottom latitude, it is ensured that
Monitor the precision of failure.
It should be noted that in the embodiment of the present application, it is contemplated that putting into operation for more multi-line can make capacitance current more greatly simultaneously
And guaranteeing certain nargin, the desirable first resistor value of maximum is 100 Ω, i.e., the value range of first resistor value is 60 Ω to 100 Ω.
Embodiment 2
According to embodiments of the present invention, it is real to additionally provide a kind of system for implementing the mode of connection of above-mentioned voltage transformer
Apply example, the wiring system of above-mentioned voltage transformer, comprising:
Threephase potential transformer, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is used
In generating residual voltage when singlephase earth fault occurs；Three above-mentioned remaining windings, are closed for being formed by way of short circuit
Mouth triangle, wherein concatenate target resistance through an above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance is for true
It is scheduled on the value size of the circulation value of above-mentioned silent triangle when above-mentioned singlephase earth fault occurs, above-mentioned circulation value is less than or waits
In the capability value of the secondary side of above-mentioned threephase potential transformer.
It should be noted that above-mentioned threephase potential transformer is made of three single-phase potential transformers, each single-phase voltage
A remaining winding is arranged in mutual inductor, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs.
In an alternative embodiment, above system further include: zero sequential potential transformer, with above-mentioned three-phase voltage mutual inductance
Device connection, wherein the neutral point of the primary side of above-mentioned threephase potential transformer is grounded through above-mentioned zero sequential potential transformer.
In an alternative embodiment, the resistance value of above-mentioned target resistance is also used to that above-mentioned single-phase earthing event is occurring
Before barrier or after above-mentioned singlephase earth fault occurs, the value size of the circulation value of above-mentioned silent triangle is determined.
In an alternative embodiment, it in the case where the resistance value of above-mentioned target resistance is first resistor value, determines
The circulation value of above-mentioned silent triangle is the first load current value, wherein above-mentioned first resistor value and above-mentioned first rated current
Value is inversely proportional；And in the case where the resistance value of above-mentioned target resistance is first resistor value, above-mentioned zero sequential potential transformer is determined
Measurement voltage be the first voltage value.
In an alternative embodiment, the value range of above-mentioned first resistor value is 60 Ω to 100 Ω；Above-mentioned first volume
The value range of constant current value is 0 to 1.5A, and the value range of above-mentioned the first voltage value is 75V to 100V.
It should be noted that the wiring side of any one optional or preferred voltage transformer in above-described embodiment 1
Method can be executed or be realized in the wiring system of voltage transformer provided by the present embodiment.
In addition, still it should be noted that the optional or preferred embodiment of the present embodiment may refer to the phase in embodiment 1
Description is closed, details are not described herein again.
Embodiment 3
According to embodiments of the present invention, it is real to additionally provide a kind of device for implementing the mode of connection of above-mentioned voltage transformer
Example is applied, Fig. 6 is a kind of structural schematic diagram of the termination of voltage transformer according to an embodiment of the present invention, as shown in fig. 6, on
State the termination of voltage transformer, comprising: first processing module 60, Second processing module 62 and concatenation module 64, in which:
First processing module 60, for connecing the neutral point of the primary side of threephase potential transformer through zero sequential potential transformer
Ground；Second processing module 62, for being shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle,
In, a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding when singlephase earth fault occurs for producing
Raw residual voltage；Concatenation module 64, for concatenating target resistance through above-mentioned remaining winding, wherein the resistance of above-mentioned target resistance
The value size of circulation value of the value for determining silent triangle above-mentioned when above-mentioned singlephase earth fault occurs, above-mentioned circulation value
Less than or equal to the capability value of the secondary side of above-mentioned threephase potential transformer.
It should be noted that above-mentioned modules can be realized by software or hardware, for example, for the latter,
Can be accomplished by the following way: above-mentioned modules can be located in same processor；Alternatively, above-mentioned modules are with any
Combined mode is located in different processors.
Herein it should be noted that above-mentioned first processing module 60, Second processing module 62 and concatenation module 64 correspond to
Step S102 to step S106 in embodiment 1, above-mentioned module is identical as example and application scenarios that corresponding step is realized,
But it is not limited to the above embodiments 1 disclosure of that.It should be noted that above-mentioned module can be run as a part of of device
In terminal.
It should be noted that the optional or preferred embodiment of the present embodiment may refer to the associated description in embodiment 1,
Details are not described herein again.
The termination of above-mentioned voltage transformer can also include processor and memory, above-mentioned first processing module
60, Second processing module 62 and concatenation module 64 etc. store in memory as program unit, execute storage by processor
Above procedure unit in memory realizes corresponding function.
Include kernel in processor, is gone in memory to transfer corresponding program unit by kernel, above-mentioned kernel can be set
One or more.Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM)
And/or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one
Storage chip.
According to the embodiment of the present application, a kind of storage medium embodiment is additionally provided.Optionally, in the present embodiment, above-mentioned
Storage medium includes the program of storage, wherein equipment where controlling above-mentioned storage medium in above procedure operation executes above-mentioned
The mode of connection of any one voltage transformer.
Optionally, in the present embodiment, above-mentioned storage medium can be located in computer network in computer terminal group
In any one terminal, or in any one mobile terminal in mobile terminal group, above-mentioned storage medium packet
Include the program of storage.
Optionally, when program is run, equipment where control storage medium executes following functions: by threephase potential transformer
The neutral point of primary side be grounded through zero sequential potential transformer；The corresponding remaining winding of above-mentioned threephase potential transformer is shorted shape
At silent triangle, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is used for single in generation
Residual voltage is generated when phase ground fault；Target resistance is concatenated through above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance
For determining that the value size of the circulation value of silent triangle above-mentioned when above-mentioned singlephase earth fault occurs, above-mentioned circulation value are small
In or equal to above-mentioned threephase potential transformer secondary side capability value.
Optionally, when program is run, equipment where control storage medium executes following functions: predefining above-mentioned target
The resistance value of resistance, wherein on the resistance value of above-mentioned target resistance is also used to before above-mentioned singlephase earth fault occurs or occurs
After stating singlephase earth fault, the value size of the circulation value of above-mentioned silent triangle is determined.
Optionally, when program is run, equipment where control storage medium executes following functions: in above-mentioned target resistance
In the case that resistance value is first resistor value, determine that the circulation value of above-mentioned silent triangle is the first load current value, wherein on
First resistor value is stated to be inversely proportional with above-mentioned first load current value；It and in the resistance value of above-mentioned target resistance is first resistor value
In the case of, determine that the measurement voltage of above-mentioned zero sequential potential transformer is the first voltage value.
According to the embodiment of the present application, a kind of processor embodiment is additionally provided.Optionally, in the present embodiment, above-mentioned place
Reason device is for running program, wherein above procedure executes the mode of connection of any one of the above voltage transformer when running.
The embodiment of the present application provides a kind of equipment, equipment include processor, memory and storage on a memory and can
The program run on a processor, processor perform the steps of when executing program by the primary side of threephase potential transformer
Neutral point is grounded through zero sequential potential transformer；It is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle
Shape, wherein a remaining winding is arranged in each single-phase potential transformer, and above-mentioned residue winding is used to that singlephase earth fault to occur
When generate residual voltage；Target resistance is concatenated through above-mentioned remaining winding, wherein the resistance value of above-mentioned target resistance is for determining
The value size of the circulation value of above-mentioned silent triangle when above-mentioned singlephase earth fault occurs, above-mentioned circulation value is less than or equal to upper
State the capability value of the secondary side of threephase potential transformer.
Optionally, when above-mentioned processor executes program, the resistance value of above-mentioned target resistance can also be predefined, wherein
The resistance value of above-mentioned target resistance is also used to before above-mentioned singlephase earth fault occurs or after above-mentioned singlephase earth fault occurs, really
The value size of the circulation value of fixed above-mentioned silent triangle.
It optionally, can also be first resistor value in the resistance value of above-mentioned target resistance when above-mentioned processor executes program
In the case where, determine above-mentioned silent triangle circulation value be the first load current value, wherein above-mentioned first resistor value with it is above-mentioned
First load current value is inversely proportional；And in the case where the resistance value of above-mentioned target resistance is first resistor value, above-mentioned zero is determined
The measurement voltage of sequence voltage mutual inductor is the first voltage value.
Present invention also provides a kind of computer program products, when executing on data processing equipment, are adapted for carrying out just
The program of beginningization there are as below methods step: the neutral point of the primary side of threephase potential transformer is connect through zero sequential potential transformer
Ground；It is shorted the corresponding remaining winding of above-mentioned threephase potential transformer to form silent triangle, wherein each single-phase voltage mutual inductance
A remaining winding is arranged in device, and above-mentioned residue winding is for generating residual voltage when singlephase earth fault occurs；Through above-mentioned surplus
Remaining winding concatenates target resistance, wherein the resistance value of above-mentioned target resistance is for determining when above-mentioned singlephase earth fault occurs
The value size of the circulation value of above-mentioned silent triangle, above-mentioned circulation value are less than or equal to the secondary of above-mentioned threephase potential transformer
The capability value of side.
Optionally, when above-mentioned computer program product executes program, the resistance of above-mentioned target resistance can also be predefined
Value, wherein the resistance value of above-mentioned target resistance is also used to before above-mentioned singlephase earth fault occurs or occurs above-mentioned single-phase earthing
After failure, the value size of the circulation value of above-mentioned silent triangle is determined.
It optionally, can also be the in the resistance value of above-mentioned target resistance when above-mentioned computer program product executes program
In the case where one resistance value, determine that the circulation value of above-mentioned silent triangle is the first load current value, wherein above-mentioned first resistor
Value is inversely proportional with above-mentioned first load current value；And in the case where the resistance value of above-mentioned target resistance is first resistor value, really
The measurement voltage of fixed above-mentioned zero sequential potential transformer is the first voltage value.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical 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
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
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 unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (12)
1. a kind of mode of connection of voltage transformer characterized by comprising
The neutral point of the primary side of threephase potential transformer is grounded through zero sequential potential transformer；
It is shorted the corresponding remaining winding of the threephase potential transformer to form silent triangle, wherein each single-phase voltage is mutual
A remaining winding is arranged in sensor, and the residue winding is for generating residual voltage when singlephase earth fault occurs；
Target resistance is concatenated through the remaining winding, wherein for determining the list is occurring for the resistance value of the target resistance
The value size of the circulation value of silent triangle when phase ground fault, the circulation value are less than or equal to the three-phase voltage
The capability value of the secondary side of mutual inductor.
2. mode of connection according to claim 1, which is characterized in that before the remaining winding concatenation target resistance,
The method also includes:
Predefine the resistance value of the target resistance, wherein the resistance value of the target resistance is also used to that the list is occurring
Before phase ground fault or after the singlephase earth fault occurs, the value size of the circulation value of the silent triangle is determined.
3. mode of connection according to claim 1, which is characterized in that the target resistance resistance value be first resistor
In the case where value, determine that the circulation value of the silent triangle is the first load current value, wherein the first resistor value and institute
The first load current value is stated to be inversely proportional；And in the case where the resistance value of the target resistance is first resistor value, described in determination
The measurement voltage of zero sequential potential transformer is the first voltage value.
4. mode of connection according to claim 3, which is characterized in that the value range of the first resistor value be 60 Ω extremely
100Ω；The value range of first load current value is 0 to 1.5A, the value range of the first voltage value be 75V extremely
100V。
5. a kind of wiring system of voltage transformer characterized by comprising
Threephase potential transformer, wherein a remaining winding is arranged in each single-phase potential transformer, and the residue winding is used for
Occur to generate residual voltage when singlephase earth fault；
Three remaining windings, for forming silent triangle by way of short circuit, wherein through a remaining winding
Concatenate target resistance, wherein the resistance value of the target resistance for determine when the singlephase earth fault occurs described in close
The value size of the circulation value of mouth triangle, the circulation value are less than or equal to the appearance of the secondary side of the threephase potential transformer
Magnitude.
6. wiring system according to claim 5, which is characterized in that the system also includes:
Zero sequential potential transformer is connect with the threephase potential transformer, wherein the primary side of the threephase potential transformer
Neutral point is grounded through the zero sequential potential transformer.
7. wiring system according to claim 5, which is characterized in that the resistance value of the target resistance is also used to occurring
Before the singlephase earth fault or after the singlephase earth fault occurs, determine that the value of the circulation value of the silent triangle is big
It is small.
8. wiring system according to claim 6, which is characterized in that the target resistance resistance value be first resistor
In the case where value, determine that the circulation value of the silent triangle is the first load current value, wherein the first resistor value and institute
The first load current value is stated to be inversely proportional；And in the case where the resistance value of the target resistance is first resistor value, described in determination
The measurement voltage of zero sequential potential transformer is the first voltage value.
9. wiring system according to claim 8, which is characterized in that the value range of the first resistor value be 60 Ω extremely
100Ω；The value range of first load current value is 0 to 1.5A, the value range of the first voltage value be 75V extremely
100V。
10. a kind of termination of voltage transformer characterized by comprising
First processing module, for the neutral point of the primary side of threephase potential transformer to be grounded through zero sequential potential transformer；
Second processing module, for being shorted the corresponding remaining winding of the threephase potential transformer to form silent triangle,
In, a remaining winding is arranged in each single-phase potential transformer, and the residue winding when singlephase earth fault occurs for producing
Raw residual voltage；
Concatenation module, for concatenating target resistance through the remaining winding, wherein the resistance value of the target resistance is for determining
The value size of the circulation value of the silent triangle when the singlephase earth fault occurs, the circulation value are less than or equal to
The capability value of the secondary side of the threephase potential transformer.
11. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require any one of 1 to 4 described in voltage transformer wiring side
Method.
12. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run
Benefit require any one of 1 to 4 described in voltage transformer mode of connection.
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