CN108390357A - A kind of zero curve detecting system and power supply unit - Google Patents
A kind of zero curve detecting system and power supply unit Download PDFInfo
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- CN108390357A CN108390357A CN201810387457.0A CN201810387457A CN108390357A CN 108390357 A CN108390357 A CN 108390357A CN 201810387457 A CN201810387457 A CN 201810387457A CN 108390357 A CN108390357 A CN 108390357A
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Classifications
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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
- H02H7/045—Differential protection of transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
A kind of zero curve detecting system provided by the present application and power supply unit, including acquisition system and metering system；The acquisition system includes that current acquisition unit sum aggregate copies ammeter, the current acquisition unit is set on the ground wire of power supply unit for locality line current value, and the collection is copied ammeter and connect with the current acquisition unit for the ground line current value to be sent to the metering system；The metering system includes the first receiving unit and first processing units, and first receiving unit is used to receive the ground line current value that the collection copies ammeter transmission；The first processing units are connect with first receiving unit, to generate system zero-line failure signal when detecting that the ground line current value is higher than predetermined current threshold.In this way, taking full advantage of, collection copies ammeter and metering system realizes remote monitoring to transformer system zero-line failure, improves the promptness of fault detect and processing.
Description
Technical field
This application involves low-pressure system detection protection technique fields, in particular to a kind of zero curve detecting system and confession
Electric equipment.
Background technology
As various electrical equipments are universal in life, Electrical Safety, reliability etc. are also increasingly taken seriously.With
In electric safety, the operation of transformer plays very important effect.
When transformer normal operation, the zero curve system of transformer is normal, and the ground wire of transformer is substantially without electric current.Work as change
When the zero curve failure of depressor disconnects, many problems are will result in, at this point, ground wire electrification.If disconnected for transformer zero curve
We can not may result in phase drift if timely processing to the failure opened, and in turn resulting in other phases or two-phase voltage reduces,
And remaining phase voltage directly increases.And overtension or it is too low be all easily damaged user equipment, cause user equipment to burn out.
Currently, neutral line break protection equipment in the market can not exchange information with metering automation system, system zero-line failure
It generally requires to be found by manual patrol, is difficult often to find in time when zero curve breaks down therefore.
Invention content
In order to overcome above-mentioned deficiency in the prior art, the application's is designed to provide a kind of zero curve detecting system, packet
Include acquisition system and metering system；
The acquisition system includes that current acquisition unit sum aggregate copies ammeter, and the current acquisition unit is set to power supply unit
Ground wire on copy ammeter for locality line current value, the collection and connect with the current acquisition unit for the ground wire is electric
Flow valuve is sent to the metering system；
The metering system includes the first receiving unit and first processing units, and first receiving unit is for receiving institute
State the ground line current value that collection copies ammeter transmission；
The first processing units are connect with first receiving unit, to detect that the ground line current value is higher than
System zero-line failure signal is generated when predetermined current threshold.
Optionally, the zero curve detecting system, the metering system further includes input unit, for receiving user configuration
Current threshold, or receive user configuration voltage class threshold value with according to the voltage class threshold value generate current threshold.
Optionally, the zero curve detecting system, the metering system include connect with the first processing units
One communication unit, first communication unit are used to the system zero-line failure signal being sent to mobile terminal.
Optionally, the zero curve detecting system, it includes the first wireless communication module that the collection, which copies ammeter, and described first connects
It includes the second wireless communication module to receive unit, and the collection is copied ammeter and wirelessly communicated by described first with first receiving unit
Module and second wireless communication module carry out wireless communication.
Optionally, the zero curve detecting system, it includes copying the timer that ammeter is connect with the collection that the collection, which copies ammeter,
The timer copies ammeter and periodically sends the ground line current value for controlling the collection.
The another object of the application is to provide another zero curve detecting system, and the zero curve detecting system is set to power supply
On the ground wire of equipment, including current acquisition unit, collection copy ammeter, and it includes that collection copies unit, parameter presets unit that the collection, which copies ammeter,
And second processing unit,
The current acquisition unit is set on the ground wire of the power supply unit, to locality line current value；
The collection is copied unit and is connect respectively with the current acquisition unit and the second processing unit, to by described
Line current value is sent to the second processing unit connection；
The second processing unit is preset unit with the parameter and is connect, pre- to the ground line current value and parameter
If the preset current threshold of unit, and generate zero in ground line current value current threshold preset higher than the default unit of parameter
Line fault-signal.
Optionally, the zero curve detecting system, the parameter preset the current threshold that unit is used to receive user configuration,
Or the voltage class threshold value of user configuration is received to generate current threshold according to the voltage class threshold value.
Optionally, the zero curve detecting system, it includes being connect with second processing unit to by institute that the collection, which copies ammeter,
State the third wireless communication module that system zero-line failure signal is sent to metering system；
The metering system includes the second receiving unit for receiving the system zero-line failure signal, and described second receives list
Member includes the 4th wireless communication module, and the collection copies ammeter and passes through the third wireless communication module with second receiving unit
And the 4th wireless communication module carries out wireless communication.
Optionally, the zero curve detecting system, the metering system include connecting to be used for second receiving unit
The system zero-line failure signal that second receiving unit receives is sent to the second communication unit of mobile terminal.
The another object of the application is to provide a kind of power supply unit, is provided on the ground wire of the power supply unit and acquires system
System, the acquisition system include the current acquisition unit for locality line current value on the ground wire for be set to power supply unit, and
The collection being connect with the current acquisition unit copies ammeter；
The collection copies ammeter for the ground line current value that the current acquisition unit acquires to be sent to metering system, so that
The first processing units of the metering system generate zero curve event when detecting that the ground line current value is higher than predetermined current threshold
Hinder signal；
Alternatively, the second processing unit for copying ammeter that collects according to the ground line current value for generating system zero-line failure letter
Number, and the system zero-line failure signal is sent to metering system.
In terms of existing technologies, the application has the advantages that：
A kind of zero curve detecting system that this programme provides, in the zero curve detecting system, by setting current sensing means
It sets on the ground wire of transformer, to detect ground line current value.It is preset when the ground line current value that current sensing means detects is more than
When current threshold, illustrate that power supply unit zero curve breaks down.Therefore, current sensing means and collection ammeter is copied in this programme to connect
It connects, copy ammeter using collection is sent to automatic Measuring System to generate zero curve by the ground line current value that current sensing means detects
Fault message, alternatively, collection copies ammeter and directly generates system zero-line failure information and is sent to metering system.When current sensing means detects
When having electric current on ground wire, there is the information of transformer system zero-line failure in corresponding automatic Measuring System.Therefore, user can directly exist
System zero-line failure information is obtained on metering system, to find in time and handle system zero-line failure.
Description of the drawings
It, below will be to needed in the embodiment attached in order to illustrate more clearly of the technical solution of the embodiment of the present application
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of zero curve detecting system provided by the embodiments of the present application；
Fig. 2 is the acquisition system schematic diagram of first kind zero curve acquisition system provided by the embodiments of the present application；
Fig. 3 is the metering system schematic diagram of first kind zero curve acquisition system provided by the embodiments of the present application；
Fig. 4 is the acquisition system schematic diagram of the second class zero curve acquisition system provided by the embodiments of the present application；
Fig. 5 is the metering system schematic diagram of the second class zero curve acquisition system provided by the embodiments of the present application.
Icon：1- current acquisition units；2- collection copies ammeter；3- metering systems；4- electrical equipments；211- first is wirelessly communicated
Module；212- timers；311- input units；The first receiving units of 312-；The first communication units of 313-；314- first handles list
Member；The second wireless communication modules of 3121-；221- collection copies unit；222- second processing units；223- parameters preset unit；224-
Third wireless communication module；The second receiving units of 321-；The second communication units of 322-；The 4th wireless communication modules of 3211-.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiments herein to providing in the accompanying drawings be not intended to limit it is claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model of the application protection
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present application, it should be noted that the orientation or positional relationship of the instructions such as "upper", "lower" is based on attached
Orientation or positional relationship shown in figure or the invention product using when the orientation or positional relationship usually put, be only for
It is described convenient for description the application and simplifying, specific side must be had by not indicating or implying the indicated device or element
Position, with specific azimuth configuration and operation, therefore should not be understood as the limitation to the application.In addition, term " first ", " the
Two ", " third ", " the 4th " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" refers to only that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be electrical connection；It can be directly connected, it can also be indirect by intermediary
It is connected, can is the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
The low-voltage network in China mostly uses greatly three line quadriphase systems and transmits electricity, and big for access resident's building mostly uses
The method of threephase load mean allocation, in the case of ideal three-phase equilibrium, each phase voltage is roughly the same, phase difference 120
Degree.
Single-phase load can not equilibrium assignmen when, access the earth zero curve can by unbalanced electric current import the earth to tie up
Hold the balance of load voltage therefore judge zero curve system whether failure when the prior art often through each phase of detection voltage feelings
Condition detects the current conditions of zero curve to judge.But the electric current feelings of the case where by detecting each phase voltage or detection zero curve
Condition come judge zero curve whether failure, there is a problem of that detection is inconvenient and accuracy of detection is not high.
The present inventor it has been investigated that, under transformer normal operation, the zero curve of transformer also normal operation,
The ground wire of transformer is without electric current.When the system zero-line failure of transformer disconnects, that is, the zero curve for being in transformer neutral point disconnects, this
When, the ground wire electrification of transformer.Therefore, when whether the zero curve for judging transformer breaks down, change can be flowed through by detection
The current value of depressor ground wire judges.
Please referring to Fig. 1, Fig. 1 is the schematic diagram for the zero curve detecting system that the application preferred embodiment provides, in the present embodiment,
Zero curve detecting system includes acquisition system and metering system 3.
In first kind zero curve detecting system, Fig. 2 and Fig. 3 are please referred to, acquisition system includes that 1 sum aggregate of current acquisition unit is copied
Ammeter 2.Metering system 3 includes the first receiving unit 312 and first processing units 314.Wherein, current acquisition unit 1 is set to
For locality line current value on the ground wire of power supply unit, collection is copied ammeter 2 and is connect with current acquisition unit 1 for by ground line current
Value is sent to metering system 3；First receiving unit 312 has the function of receiving signal, for receiving the ground for collecting and copying ammeter 2 and sending
Line current value；First processing units 314 are connect with the first receiving unit 312, and ammeter is copied when the first receiving unit 312 receives collection
When the ground line current value of 2 transmissions, first processing units 314 judge whether ground line current value is high according to the current threshold of user preset
In predetermined current threshold, and system zero-line failure signal is generated when ground line current value is higher than preset current threshold.The present embodiment
Zero curve detecting system makes full use of collection to copy ammeter 2, can realize remote monitoring zero curve state, so as to find and handle in time
The failure of power supply unit zero curve.
Power supply unit may be, but not limited to, transformer.
Current acquisition unit 1 may be, but not limited to, current transformer.
Optionally, in the present embodiment, for different power supply units, due to there are the influence factors such as induction in environment,
Size of current on its ground wire can have some small disturbances, i.e. may also can when the zero curve of power supply unit is normal, on ground wire
There are a constant currents.Due to the characteristic of power supply unit itself, the influence of the power supply unit of different voltages grade to ground wire is different, because
This, the power supply unit of different voltages grade is normal in zero curve, and size of current present on ground wire is different, therefore, leads to
Setting current threshold is crossed, above-mentioned interference can be excluded, the scheme of the present embodiment is enable to be suitable for different power supply units.Metering
System 3 further includes input unit 311, and input unit 311 has data input function, the current threshold for receiving user configuration
Value, or the voltage class threshold value of user configuration is received to generate current threshold according to the voltage class threshold value.In metering system 3
Middle setting input unit 311 so that user can directly input parameter using as preset current threshold, alternatively, user inputs
Then the voltage level parameters of power supply unit generate electricity by first processing units 314 according to the voltage level parameters of power supply unit
Threshold value is flowed, to improve the applicability of the system.Wherein, input unit 311 can be button, touch screen, but be not limited to, and press
Key, touch screen etc..
Optionally, metering system 3 includes the first communication unit 313 being connect with first processing units 314 in the present embodiment.
When first processing units 314 generate system zero-line failure signal, system zero-line failure is sent to mobile terminal by the first communication unit 313
Signal, to enable tester monitor whenever and wherever possible power supply unit zero curve whether failure, find and handle more in time
System zero-line failure.
Please refer to Fig. 2 and Fig. 3, in another embodiment, collection copy ammeter 2 include the first wireless communication module 211, first
Receiving unit 312 includes the second wireless communication module 3121.The collection copies ammeter 2 and passes through institute with first receiving unit 312
It states the first wireless communication module 211 and second wireless communication module 3121 carries out wireless communication.First receiving unit 312 with
Collection copies ammeter 2 by the way of wireless communication, and the range that the first receiving unit 312 reception collection copies ammeter 2 can be made to become larger.
Fig. 2 is please referred to, in another embodiment, connection timer 2 12 on ammeter 2 is copied in collection, is controlled by timer 2 12
System collection copies period of the ammeter 2 to 3 transmission data of metering system, to reduce the energy consumption continuously transmitted and equipment loss.
In the second class zero curve acquisition system, Fig. 4 and Fig. 5 are please referred to, in one embodiment, the setting of zero curve detecting system
In on the ground wire of power supply unit, zero curve detecting system includes current acquisition unit 1, collects and copy ammeter 2, and the collection copies ammeter 2 and includes
Collection copies unit 221, parameter presets unit 223 and second processing unit 222, the current acquisition unit 1 are set to the confession
On the ground wire of electric equipment, to locality line current value.
The collection is copied unit 221 and is connect respectively with the current acquisition unit 1 and the second processing unit 222, to
The ground line current value is sent to the second processing unit 222 to connect.
The second processing unit 222 and the parameter are preset unit 223 and connects, to the ground line current value and
Parameter presets 223 preset current threshold of unit, and presets 223 preset electric current of unit higher than parameter in the ground line current value
System zero-line failure signal is generated when threshold value.
In the present embodiment, the zero curve detecting system of the present embodiment makes full use of collection to copy ammeter 2, can realize remote monitoring zero
Linear state, so as to find and handle the failure of power supply unit zero curve in time.
Current acquisition unit 1 may be, but not limited to, current transformer.
Power supply unit may be, but not limited to, transformer.
Optionally, in the present embodiment, parameter presets the current threshold that unit 223 is used to receive user configuration, or receives and use
The voltage class threshold value of family configuration according to the voltage class threshold value to generate current threshold.Arrange parameter on ammeter 2 is copied in collection
Default unit 223 so that user can directly input parameter as preset current threshold, to be set alternatively, user inputs power supply
Then standby voltage level parameters generate current threshold by first processing units 314 according to the voltage level parameters of power supply unit,
To improve applicability of the system on different power supply units.
In one embodiment, it includes being connect with second processing unit 222 to by the system zero-line failure that the collection, which copies ammeter 2,
Signal is sent to the third wireless communication module 224 of metering system 3.
The metering system 3 includes the second receiving unit 321 for receiving the system zero-line failure signal, and described second connects
Receipts unit 321 includes the 4th wireless communication module 3211, and the collection copies ammeter 2 and second receiving unit 321 described in
Third wireless communication module 224 and the 4th wireless communication module 3211 carry out wireless communication.
In the present embodiment, is copied between ammeter 2 and metering system 3 using the communication mode of wireless communication in collection, the can be made
Four receiving modules copy 2 transmission range of ammeter with collection and become larger, and are more suitable for detecting at a distance.
In another embodiment, the metering system 3 includes being connect with second receiving unit 321 for will be described
The system zero-line failure signal that second receiving unit 321 receives is sent to the second communication unit 322 of mobile terminal.
In one embodiment, acquisition system is provided on the ground wire of power supply unit, the acquisition system includes setting
It is connect in the current acquisition unit 1 for locality line current value on the ground wire of power supply unit, and with the current acquisition unit 1
Collection copy ammeter 2；
The collection copies ammeter 2 and is used to the ground line current value that the current acquisition unit 1 acquires being sent to metering system 3,
So that the first processing units 314 of the metering system 3 are produced when detecting that the ground line current value is higher than predetermined current threshold
Raw system zero-line failure signal；
Alternatively, the second processing unit 222 for copying ammeter 2 that collects according to the ground line current value for generating system zero-line failure
Signal, and the system zero-line failure signal is sent to metering system 3.Acquisition system is set on power supply unit, can be ensured
In the case of not changed to the structure of existing power supply unit, the detection to power supply unit zero curve is realized.
In conclusion a kind of zero curve detecting system provided by the present application and its equipment, by the way that current acquisition unit 1 is arranged
On the ground wire of power supply unit, and current acquisition unit 1 is copied into ammeter 2 with collection and is connect, to detect ground line current value.Then pass through
Collection copies ammeter 2 and ground line current value is sent to metering system 3 to obtain system zero-line failure signal, alternatively, destroying 2 base area of ammeter by collection
Line current value generates system zero-line failure signal and retransmits to metering system 3.In this way, taking full advantage of collection copies ammeter 2 and metering system 3
The remote monitoring to transformer system zero-line failure is realized, the promptness of fault detect and processing is improved.
In embodiment provided herein, it should be understood that disclosed device and method, it can also be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the flow chart and block diagram in attached drawing are shown
According to the device, the architectural framework in the cards of method and computer program product, function of multiple embodiments of the application
And operation.In this regard, each box in flowchart or block diagram can represent one of a module, section or code
Point, a part for the module, section or code includes one or more for implementing the specified logical function executable
Instruction.It should also be noted that at some as in the realization method replaced, the function of being marked in box can also be attached to be different from
The sequence marked in figure occurs.For example, two continuous boxes can essentially be basically executed in parallel, they also may be used sometimes
To execute in the opposite order, this is depended on the functions involved.It is also noted that each of block diagram and or flow chart
The combination of box in box and block diagram and or flow chart, function or the dedicated of action are based on as defined in execution
The system of hardware is realized, or can be realized using a combination of dedicated hardware and computer instructions.
In addition, each function module in each embodiment of the application can integrate to form an independent portion
Point, can also be modules individualism, can also two or more modules be integrated to form an independent part.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer read/write memory medium.Based on this understanding, the technical solution of the application is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server or network equipment etc.) execute each embodiment the method for the application all or part of step.
And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above, the only specific implementation mode of the application, but the protection domain of the application is not limited thereto, it is any
Those familiar with the art can easily think of the change or the replacement in the technical scope that the application discloses, and should all contain
It covers within the protection domain of the application.Therefore, the protection domain of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of zero curve detecting system, which is characterized in that including acquisition system and metering system；
The acquisition system includes that current acquisition unit sum aggregate copies ammeter, and the current acquisition unit is set to the ground of power supply unit
For locality line current value on line, the collection is copied ammeter and is connect with the current acquisition unit for by the ground line current value
It is sent to the metering system；
The metering system includes the first receiving unit and first processing units, and first receiving unit is for receiving the collection
Copy the ground line current value of ammeter transmission；
The first processing units are connect with first receiving unit, to detect the ground line current value higher than default
Current threshold when generate system zero-line failure signal.
2. zero curve detecting system according to claim 1, which is characterized in that the metering system further includes input unit,
Current threshold for receiving user configuration, or the voltage class threshold value of user configuration is received with according to the voltage class threshold value
Generate current threshold.
3. zero curve detecting system according to claim 2, which is characterized in that the metering system include with described first at
The first communication unit of unit connection is managed, first communication unit is used to the system zero-line failure signal being sent to mobile whole
End.
4. zero curve detecting system according to claim 1, which is characterized in that it includes the first wireless communication that the collection, which copies ammeter,
Module, first receiving unit include the second wireless communication module, and the collection is copied ammeter and passed through with first receiving unit
First wireless communication module and second wireless communication module carry out wireless communication.
5. according to claim 1-4 any one of them zero curve detecting systems, which is characterized in that the collection copies ammeter and includes and institute
The timer that collection copies ammeter connection is stated, the timer copies ammeter and periodically send the ground line current for controlling the collection
Value.
6. a kind of zero curve detecting system, which is characterized in that the zero curve detecting system is set on the ground wire of power supply unit, including
Current acquisition unit, collection copy ammeter, and it includes that collection copies unit, parameter presets unit and second processing unit that the collection, which copies ammeter,；
The current acquisition unit is set on the ground wire of the power supply unit, to locality line current value；
The collection is copied unit and is connect respectively with the current acquisition unit and the second processing unit, to the ground wire is electric
Flow valuve is sent to the second processing unit；
The second processing unit is preset unit with the parameter and is connect, default single to the ground line current value and parameter
The preset current threshold of member, and generate zero curve event in ground line current value current threshold preset higher than the default unit of parameter
Hinder signal.
7. zero curve detecting system according to claim 6, which is characterized in that the parameter presets unit for receiving user
The current threshold of configuration, or the voltage class threshold value of user configuration is received to generate current threshold according to the voltage class threshold value
Value.
8. zero curve detecting system according to claim 6, which is characterized in that the collection copies ammeter and includes and second processing list
Member connects for the system zero-line failure signal to be sent to the third wireless communication module of metering system；
The metering system includes the second receiving unit for receiving the system zero-line failure signal, the second receiving unit packet
The 4th wireless communication module is included, the collection copies ammeter and passes through the third wireless communication module and institute with second receiving unit
The 4th wireless communication module is stated to carry out wireless communication.
9. zero curve detecting system according to claim 8, which is characterized in that the metering system includes being connect with described second
It receives the system zero-line failure signal of the unit connection for receiving second receiving unit and is sent to the second of mobile terminal
Communication unit.
10. a kind of power supply unit, which is characterized in that be provided with acquisition system, the acquisition system on the ground wire of the power supply unit
System includes the current acquisition unit being set on the ground wire of power supply unit for locality line current value, and with the current acquisition
The collection of unit connection copies ammeter；
The collection copies ammeter for the ground line current value that the current acquisition unit acquires to be sent to metering system, so that described
The first processing units of metering system generate system zero-line failure letter when detecting that the ground line current value is higher than predetermined current threshold
Number；
Alternatively, the second processing unit that the collection copies ammeter is used to generate system zero-line failure signal according to the ground line current value, and
The system zero-line failure signal is sent to metering system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387457.0A CN108390357A (en) | 2018-04-26 | 2018-04-26 | A kind of zero curve detecting system and power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387457.0A CN108390357A (en) | 2018-04-26 | 2018-04-26 | A kind of zero curve detecting system and power supply unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112180135A (en) * | 2020-10-26 | 2021-01-05 | 杭州海兴电力科技股份有限公司 | Zero line interference preventing electric energy meter adjusting method and electric energy meter |
| CN113049043A (en) * | 2021-03-23 | 2021-06-29 | 深圳友讯达科技股份有限公司 | Smart meter box sensing method and device based on low-voltage centralized meter reading local communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112180135A (en) * | 2020-10-26 | 2021-01-05 | 杭州海兴电力科技股份有限公司 | Zero line interference preventing electric energy meter adjusting method and electric energy meter |
| CN112180135B (en) * | 2020-10-26 | 2023-11-07 | 杭州海兴电力科技股份有限公司 | Zero line interference prevention electric energy meter adjustment method and electric energy meter thereof |
| CN113049043A (en) * | 2021-03-23 | 2021-06-29 | 深圳友讯达科技股份有限公司 | Smart meter box sensing method and device based on low-voltage centralized meter reading local communication |
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