CN107561326A - Electric power meter and power supply management system - Google Patents
Electric power meter and power supply management system Download PDFInfo
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- CN107561326A CN107561326A CN201710896181.4A CN201710896181A CN107561326A CN 107561326 A CN107561326 A CN 107561326A CN 201710896181 A CN201710896181 A CN 201710896181A CN 107561326 A CN107561326 A CN 107561326A
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Abstract
The present invention relates to Electric Energy Metering Technology field, in particular to a kind of electric power meter and power supply management system.Electric power meter includes the first current transformer, the second current transformer, electric energy meter and controller.The beneficial effect of the embodiment of the present invention is, the secondary side winding of first current transformer and the secondary side winding of second current transformer can export large and small two kinds of different electric currents, so that the electric power meter can realize the accurate measurement of high current and low current.
Description
Technical field
The present invention relates to Electric Energy Metering Technology field, in particular to a kind of electric power meter and power supply management system
System.
Background technology
Power supply department uses " high voltage supply, high pressure measurement, acquisition terminal " pattern per family for the larger use of power load
Metering is powered, power network 10000V high pressures/high current is converted into 100V low pressure/low current by electric power mutual-inductor enters intelligence
Energy electric energy meter is measured, and intelligent electric energy meter is connected with acquisition terminal by RS485, and acquisition terminal measures intelligent electric energy meter
Obtained user power utilization data send the long distance wireless collection for power supply department management system, realizing electricity consumption data.
At present, the conventional metering method metering electric energy of electric energy metrical field generally use, it is relatively stable for power load
User for, as long as configuring suitable electric power mutual-inductor, metric results are typically more accurate, but there is also some deficiency.It is first
First, for the user of larger peak-valley difference, such as rural subscribers be present, spring sowing autumn harvest concentrates electricity consumption, is usually only used for illuminating, or
It is urban cells seasonality heating, and the smelting electricity consumption of highly energy-consuming, often even excess load at full capacity during its normal operation
Load is very low when running, and not going into operation or stop production, and for peak-valley difference up to more than 10 times, this causes pole to the configuration of electric power mutual-inductor
Big difficult, even if the large velocity ratio transformer of configuration high accuracy, also only can guarantee that just has standard under nominal current conditions
True measurement accuracy, and because the existing vertification regulation of country will to the minimum current and maximum current accuracy of measurement of transformer
Ask relatively low, under the conditions of minimum current and maximum current, although accuracy of measurement disclosure satisfy that wanting for the existing vertification regulation of country
Ask, but substantially its measurement error is far longer than rated current, or even it is less than electric power mutual inductance in user power utilization load current
During 1% rated current of device, conventional electric power transformer measurement less than this low current load, increase due to metering device performance and
Caused power loss.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of electric power meter and power supply management system, with
Solve the above problems.
The embodiments of the invention provide a kind of electric power meter, the electric power meter includes the first Current Mutual Inductance
Device, the second current transformer, electric energy meter and controller；
The first side winding of first current transformer is arranged at three phase network A phase lines, first Current Mutual Inductance
The secondary side winding of device includes the first head end tap, the first centre tap and first end tap, the first head end tap,
One centre tap and first end tap are connected to the A phase current sampling port sets of the controller, the A phases electricity of the controller
Stream output port group is connected with the A phase current sampling port sets of the electric energy meter, and the controller is for detecting described the
When the current value of winding is located at the first preset threshold range between one head end tap and the first centre tap, the current value is sent
To the electric energy meter, as A phase current sampling values, winding between the first head end tap and the first centre tap is being detected
Current value when being located at the second preset threshold range, by the electric current of winding between the first head end tap and first end tap
Value is sent to the electric energy meter, as A phase current sampling values；
The first side winding of second current transformer is arranged at three phase network C phase lines, second Current Mutual Inductance
The secondary side winding of device includes the second head end tap, the second centre tap and second end tap, the second head end tap,
Two centre taps and second end tap are connected to the C phase current sampling port sets of the controller, the C phases electricity of the controller
Stream output port group is connected with the C phase current sampling port sets of the electric energy meter, and the controller is additionally operable to described in detect
When the current value of winding is located at three preset threshold ranges between second head end tap and the second centre tap, the current value is sent out
The electric energy meter is delivered to, as C phase current sampling values, is detecting the spaced winding of the second head end tap and the second centre tap
When the current value of group is located at four preset threshold ranges, by the electricity of winding between the second head end tap and second end tap
Flow valuve is sent to the electric energy meter, as C phase current sampling values.
Further, the electric power meter also includes voltage transformer, the first side winding of the voltage transformer
Three-phase electricity circuit is connected to, the secondary side winding of the voltage transformer is connected to the voltage sample port group of the electric energy meter,
The voltage sample value of the three-phase electricity of acquisition is sent to the electric energy meter.
Further, the first side winding of the voltage transformer includes the 3rd head end tap, the 3rd centre tap and the
Three end taps, the 3rd head end tap are connected to the three phase network A phase lines, and the 3rd centre tap is connected to three
Phase power network B phase lines, the 3rd end tap are connected to the three phase network C phase lines, the voltage transformer it is secondary
Side winding includes the first winding and the second winding, and first winding includes the 4th head end tap, the 4th centre tap and the 4th
End tap, the voltage that the 4th head end tap, the 4th centre tap and the 4th end tap are connected to the electric energy meter are adopted
Sample port set, second winding include the 5th head end tap and the 5th end tap, the 5th head end tap and the 5th end
End tap is connected to the supply port group of the controller.
Further, the electric power meter also includes acquisition terminal, and the acquisition terminal is connected with the electric energy meter,
Obtained for obtaining the electric energy meter according to the A phase current samplings value, C phase current sampling values, and the voltage sample value
Electric energy metrical.
Further, the electric power meter is arranged inside cabinet, and the cabinet includes cabinet door, the electric energy metrical
Device also includes electromagnetism lock ＆ key read head, and the electromagnetism lock ＆ key read head is connected with the controller respectively, the electromagnetism
Lock for locking the cabinet door, the key read head can read the open signal that effective electron key is sent, and send extremely
The controller, so that the controller controls the electromagnetic lock to open.
Further, the three-phase electricity circuit is provided with high-voltage switch gear, the high-voltage switch gear and the control close to user side
Device connection processed, the electric power meter also include the cabinet door sensor being connected with the controller, and the cabinet door sensor is used
In the folding condition information for detecting the cabinet door, and send to the controller, the controller is additionally operable to do not receiving institute
Alert data is generated when stating open signal, but judging the cabinet door according to the folding condition information for opening, and is controlled
The high-voltage switch gear is operated a switch, to cut off user's power supply.
Further, the electric power meter also includes acquisition terminal, and the acquisition terminal is connected with the controller,
For obtaining the folding condition information of the cabinet door, and the alert data.
Further, first current transformer, the second current transformer and voltage transformer are integrated in one, with shape
Into combined type electric power mutual-inductor.
The embodiment of the present invention additionally provides a kind of power supply management system, and the power supply management system includes server and above-mentioned
Electric power meter, the electric power meter and the server communication.
Further, the electric power meter is provided with radio transmitting device, and the electric power meter passes through the nothing
Line transmitting device and the server communication, the radio transmitting device is GPRS wireless transport modules.
Electric power meter and power supply management system provided in an embodiment of the present invention, the two of first current transformer
Secondary side winding sets the first head end tap, the first centre tap and first end tap so that first current transformer
Winding forms the first no-load voltage ratio between first side winding and the first head end tap and the first centre tap, and first electric current is mutual
Winding forms the second no-load voltage ratio between the first side winding of sensor and the first head end tap and first end tap, equally, leads to
The secondary side winding crossed in second current transformer sets the second head end tap, the second centre tap and second end to take out
Head so that winding between the first side winding of second current transformer and the second head end tap and the second centre tap
Form the 3rd no-load voltage ratio, the first side winding of second current transformer and the second head end tap and second end tap it
Between winding form the 4th no-load voltage ratio, as a result, the secondary side winding of first current transformer and second Current Mutual Inductance
The secondary side winding of device can export large and small two kinds of different electric currents, so that the electric power meter realizes high current
With the accurate measurement of low current.
Further, electric power meter and power supply management system provided in an embodiment of the present invention, in the mutual induction of voltage
The secondary side winding of device sets the 5th head end tap and the 5th end tap, and so that the 5th head end tap and the 5th
End tap is connected to the supply port group of the controller, to provide work energy for the controller so that the control
Device is without extra power supply, so as to enhance the terseness of the electric power meter structure.
Further, electric power meter provided in an embodiment of the present invention and electric power system, by setting electromagnetic lock, key
Read head and cabinet door sensor, wherein, the electromagnetic lock is used to lock the cabinet door, and the key read head can read effective electricity
The open signal that sub- key is sent, and send to the controller, so that the controller controls the electromagnetic lock to open, it is described
Cabinet door sensor is used for the folding condition information for detecting the cabinet door, and sends to the controller, so that the controller exists
Generation alarm number when not receiving the open signal, but judging the cabinet door according to the folding condition information for opening
According to controlling the high-voltage switch gear to operate a switch, to cut off user's power supply, can effectively take precautions against illegal open and set the electric power meter
Cabinet, and the power stealing electric leakage brought and potential safety hazard.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described.It should be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is a kind of electrical connection schematic diagram of electric power meter provided in an embodiment of the present invention.
Fig. 2 is another electrical connection schematic diagram of electric power meter provided in an embodiment of the present invention.
Fig. 3 is another electrical connection schematic diagram of electric power meter provided in an embodiment of the present invention.
Fig. 4 is a kind of schematic block diagram of power supply management system provided in an embodiment of the present invention.
Icon：10- power supply management systems；100- electric power meters；The current transformers of CTa- first；The head ends of as1- first
Tap；The centre taps of as2- first；As3- first end taps；The current transformers of CTc- second；Cs1- the second head end taps；
The centre taps of cs2- second；Cs3- second end taps；110- electric energy meters；120- controllers；K- high-voltage switch gears；PT- voltages are mutual
Sensor；The head end taps of A- the 3rd；The centre taps of B- the 3rd；The end taps of C- the 3rd；The head end taps of a- the 4th；Taken out among b- the 4th
Head；The end taps of c- the 4th；The head end taps of u- the 5th；The end taps of n- the 5th；130- acquisition terminals；140- electromagnetic locks；150-
Key read head；160- cabinet door sensors；200- servers.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally
The component for the embodiment of the present invention being described and illustrated herein in the accompanying drawings can be configured to arrange and design with a variety of.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
Referring to Fig. 1, the embodiments of the invention provide a kind of electric power meter 100, the electric power meter 100 wraps
Include the first Current Transmit a, the second Current Transmit c, electric energy meter 110 and controller 120.
The first side winding of the first Current Transmit a is arranged at three phase network A phase lines, and first electric current is mutual
Sensor CTa secondary side winding includes the first head end tap as1, the first centre tap as2 and first end tap as3, described
First head end tap as1, the first centre tap as2 and first end tap as3 are connected to the A phase currents of the controller 120
Sample port group, the A phase current output port groups of the controller 120 and the A phase current sampling port sets of the electric energy meter 110
Connection.The first side winding of the second Current Transmit c is arranged at three phase network C phase lines, second Current Mutual Inductance
Device CTc secondary side winding includes the second head end tap cs1, the second centre tap cs2 and second end tap cs3, and described the
The C phase currents that two head end tap cs1, the second centre tap cs2 and second end tap cs3 are connected to the controller 120 are adopted
Sample port set, the C phase current output port groups of the controller 120 connect with the C phase current samplings port set of the electric energy meter 110
Connect.
Wherein, among the first side winding of the first Current Transmit a and the first head end tap as1 and first
Winding forms the first no-load voltage ratio between tap as2, and first side winding and first head end of the first Current Transmit a are taken out
Winding forms the second no-load voltage ratio between head as1 and first end tap as3, and first no-load voltage ratio is less than second no-load voltage ratio, thus,
Between the first head end tap as1 and the first centre tap as2 the current value of winding be more than the first head end tap as1 and
The current value of winding between first end tap as3, that is, comparatively, being taken out among the first head end tap as1 and first
Winding is high current winding between head as2, high current is exported, between the first head end tap as1 and first end tap as3
Winding is low current winding, exports low current.The controller 120 is used to detect the first head end tap as1 and the
When the current value of winding is located at the first preset threshold range between one centre tap as2, the current value is sent to the electric energy
Table 110, as A phase current sampling values, detecting winding between the first head end tap as1 and the first centre tap as2
Current value when being located at the second preset threshold range, by winding between the first head end tap as1 and first end tap as3
Current value send to the electric energy meter 110, as A phase current sampling values.In the present embodiment, first preset threshold range
Can be the 20%~120% of the secondary side winding rated current of the first Current Transmit a, second predetermined threshold value
Scope can be the 0~20% of the secondary side winding rated current of the first Current Transmit a, with specific reference to practical application
Demand is set, and the present embodiment is not restricted to this.
Equally, among the first side winding of the second Current Transmit c and the second head end tap cs1 and second
Winding forms the 3rd no-load voltage ratio between tap cs2, and first side winding and second head end of the second Current Transmit c are taken out
Winding forms the 4th no-load voltage ratio between head cs1 and second end tap cs3, and the 3rd no-load voltage ratio is less than the 4th no-load voltage ratio, thus,
Between the second head end tap cs1 and the second centre tap cs2 the current value of winding be more than the second head end tap cs1 and
The current value of winding between second end tap cs3, that is, comparatively, being taken out among the second head end tap cs1 and second
Winding is high current winding between head cs2, high current is exported, between the second head end tap cs1 and second end tap cs3
Winding is low current winding, exports low current.The controller 120 be additionally operable to detect the second head end tap cs1 and
When the current value of winding is located at three preset threshold ranges between second centre tap cs2, the current value is sent to the electricity
Energy table 110, as C phase current sampling values, is detecting the second head end tap cs1 and the second centre tap cs2 spaced winding
When the current value of group is located at four preset threshold ranges, by the second head end tap cs1 and second end tap cs3 spaced winding
The current value of group is sent to the electric energy meter 110, as C phase current sampling values.In the present embodiment, the 3rd predetermined threshold value model
Enclose the 20%~120% of the secondary side winding rated current that can be the second Current Transmit c, the described 4th default threshold
Value scope can be the 0~20% of the secondary side winding rated current of the second Current Transmit c, be answered with specific reference to actual
Set with demand, the present embodiment is not restricted to this.
In the present embodiment, the three-phase three-wire system line voltage that rated voltage is 10000V is except access first Current Mutual Inductance
Outside device CTa and the second Current Transmit c sample rate currents, also access voltage transformer pt sampled voltage, hereafter, can it is configured in
User side is delivered to after the high-voltage switch gear K of user side.Thus, in the present embodiment, the electric power meter 100 also includes
Voltage transformer pt, the first side winding of the voltage transformer pt are connected to three-phase electricity circuit, the voltage transformer pt
Secondary side winding is connected to the voltage sample port group of the electric energy meter 110, by the voltage sample value of the three-phase electricity of acquisition
Send to the electric energy meter 110.Alternatively, in the present embodiment, the first Current Transmit a, the second Current Transmit c
It is integrated in one with voltage transformer pt, to form Combined type power transformer, so as to strengthen the knot of electric power meter 100
The terseness of structure.It is understood that in the present embodiment, the electric power mutual-inductor is phase three-wire three type electric power mutual-inductor, described
Electric energy meter 110 is phase three-wire three type intelligent electric energy meter.Furthermore, it is necessary to illustrate, in the present embodiment, the electric power meter
100 are equally applicable to three-phase four-wire system electric energy metrical, are adjusted with specific reference to practical application request, for example, by the electric power mutual inductance
Device replaces with three-phase and four-line type electric power mutual-inductor, and the electric energy meter 110 is replaced with into three-phase and four-line type intelligent electric energy meter.
The first side winding of the voltage transformer pt includes the 3rd head end tap A, the 3rd centre tap B and the 3rd end
Tap C, the 3rd head end tap A are connected to the three phase network A phase lines, and the 3rd centre tap B is connected to three-phase
Power network B phase lines, the 3rd end tap C are connected to the three phase network C phase lines.The voltage transformer pt it is secondary
Side winding includes the first winding and the second winding, and first winding includes the 4th head end tap a, the 4th centre tap b and the
Four end tap c, the 4th head end tap a, the 4th centre tap b and the 4th end tap c are connected to the electric energy meter 110
Voltage sample port group, the voltage sample value of the three-phase electricity of acquisition is sent to the electric energy meter 110, described second
Winding includes the 5th head end tap u and the 5th end tap n, and the 5th head end tap u and the 5th end tap n are connected to institute
The supply port group of controller 120 is stated, to provide work energy for the controller 120.Alternatively, it is described in the present embodiment
The rated voltage of first winding of voltage transformer pt secondary side winding is 100V, the voltage transformer pt secondary side winding
The rated voltage of second winding is 220V.
Pass through above-mentioned setting so that the secondary side winding of the first Current Transmit a and second Current Mutual Inductance
Device CTc secondary side winding can export large and small two kinds of different electric currents, so that the electric power meter 100 is realized
The accurate measurement of high current and low current, also, the 5th head end of the second winding of the voltage transformer pt secondary side winding
Tap u and the 5th end tap n is connected to the supply port group of the controller 120, to provide work for the controller 120
Electric energy so that the controller 120 is without extra power supply, so as to further enhancing the electric power meter 100
The terseness of structure.
Referring to Fig. 2, alternatively, in the present embodiment, the electric power meter 100 also includes acquisition terminal 130, described
Acquisition terminal 130 is connected with the electric energy meter 110, for obtaining the electric energy meter 110 according to the A phase current samplings value, C phases
Current sampling data, and the electric energy metrical that the voltage sample value obtains.Specifically, in the present embodiment, the acquisition terminal 130
It is connected by RS485 universal serial bus with the controller 120.Alternatively, in the present embodiment, the acquisition terminal 130 can be with
By radio transmitting device and the server communication of power supply department power supply management system, the electric energy metrical is sent to the clothes
Business device, realizes remote data radio meter register.
In actual applications, the electric power meter 100 is arranged inside cabinet, and the cabinet includes cabinet door.It please join
Fig. 3 is read, in order to strengthen the safety in utilization of the electric power meter 100, alternatively, and in the present embodiment, the electric energy metrical
Device 100 also includes electromagnetic lock 140 and key read head 150, the electromagnetic lock 140 and key read head 150 respectively with the control
Device 120 connects, and the electromagnetic lock 140 is used to lock the cabinet door, and the key read head 150 can read effective electron key
The open signal sent, and send to the controller 120, so that the controller 120 controls the electromagnetic lock 140 to open.
In the present embodiment, the open signal can include opening time, and the identification information of the effective electron key, can also manage
Solve as the identity information of effective electron key holder.It should be noted that in the present embodiment, the electromagnetic lock 140 is opened
Opening the time can also be sent to the controller 120 by the electromagnetic lock 140, in addition, in the present embodiment, when the electromagnetic lock
During 140 closing, the electromagnetic lock 140 will also be sent to the controller 120 shut-in time.
In order to further enhance the safety in utilization of the electric power meter 100, alternatively, in the present embodiment, control
Device 120 is also connected with the high-voltage switch gear K, and the electric power meter 100 also includes the cabinet door being connected with the controller 120
Sensor 160, the cabinet door sensor 160 is used for the folding condition information for detecting the cabinet door, and sends to the controller
120, the controller 120 is additionally operable to do not receiving the open signal, but according to judging the folding condition information
Cabinet door generates alert data when being opening, and controls the high-voltage switch gear K to operate a switch, to cut off user's power supply.Hereafter, as
A kind of mode for recovering user's power supply, alternatively, in the present embodiment, effective electron key is read in the key read head 150
The energization control signal sent, and send to the controller 120, the controller 120 can just control the high-voltage switch gear K
Close a floodgate, to recover user's power supply.In this way, non-effective electron key holder can be avoided to open the cabinet door of the cabinet by force,
And the power stealing electric leakage brought and potential safety hazard.In the present embodiment, the cabinet door sensor 160 can be Hall sensor, also may be used
To be door sensor inductor, the present embodiment is not restricted to this.
Alternatively, in the present embodiment, the acquisition terminal 130 is also connected with the controller 120, for obtaining the cabinet
The folding condition information of door, and the alert data.Specifically, in the present embodiment, the acquisition terminal 130 passes through RS485
Universal serial bus is connected with the controller 120.Equally, alternatively, in the present embodiment, the acquisition terminal 130 can also pass through
Radio transmitting device and the server communication of power supply department power supply management system, the folding condition information and alert data are sent out
The server is delivered to, is recorded, meanwhile, also allow for power supply department and handled in time, so as to improve power supply standardization pipe
Reason is horizontal.
Referring to Fig. 4, the embodiment of the present invention additionally provides a kind of power supply management system 10, the power supply management system 10 is wrapped
Server 200 and above-mentioned electric power meter 100 are included, the electric power meter 100 communicates with the server 200.This reality
Apply in example, the server 200 can be the server of power supply department power supply management system.
Further, the electric power meter 100 is provided with radio transmitting device, and the electric power meter 100 is logical
Cross the radio transmitting device to communicate with the server 200, the radio transmitting device is GPRS wireless transport modules.It is optional
Ground, in the present embodiment, the radio transmitting device is arranged at the acquisition terminal 130.
In summary, electric power meter and power supply management system provided in an embodiment of the present invention, in first electric current
Transformer CTa secondary side winding sets the first head end tap as1, the first centre tap as2 and first end tap as3, makes
Between the first side winding and the first head end tap as1 and the first centre tap as2 that obtain the first Current Transmit a
Winding forms the first no-load voltage ratio, first side winding and the first head end tap as1 and first of the first Current Transmit a
Winding forms the second no-load voltage ratio between end tap as3, equally, passes through the secondary side winding in the second Current Transmit c
Second head end tap cs1, the second centre tap cs2 and second end tap cs3 are set so that second current transformer
Winding forms the 3rd no-load voltage ratio, institute between CTc first side winding and the second head end tap cs1 and the second centre tap cs2
State winding between the second Current Transmit c first side winding and the second head end tap cs1 and second end tap cs3
The 4th no-load voltage ratio is formed, as a result, the secondary side winding of the first Current Transmit a and second current transformer
CTc secondary side winding can export large and small two kinds of different electric currents, so that the electric power meter 100 is realized greatly
The accurate measurement of electric current and low current.
Further, electric power meter and power supply management system provided in an embodiment of the present invention, in the mutual induction of voltage
Device PT secondary side winding sets the 5th head end tap u and the 5th end tap n, and so that the 5th head end tap u and
5th end tap n is connected to the supply port group of the controller 120, to provide work energy for the controller 120, increases
The strong terseness of the structure of electric power meter 100.
Further, electric power meter provided in an embodiment of the present invention and electric power system, by set electromagnetic lock 140,
Key read head 150 and cabinet door sensor 160, wherein, the electromagnetic lock 140 is used to lock the cabinet door, the key read head 150
The open signal that effective electron key is sent can be read, and is sent to the controller 120, so that the controller 120
The electromagnetic lock 140 is controlled to open, the cabinet door sensor 160 is used for the folding condition information for detecting the cabinet door, and sends
To the controller 120, so that the controller 120 is not receiving the open signal, but believed according to the folding condition
Breath generates alert data when judging the cabinet door for opening, controls the high-voltage switch gear K to operate a switch, to cut off user's power supply,
It can effectively take precautions against the illegal cabinet opened and the electric power meter 100 is set, and the power stealing electric leakage brought and potential safety hazard.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect.Can be mechanical connection or electrical connection.Can be joined directly together, can also be indirectly connected by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
In the description of the invention, it is also necessary to explanation, the orientation or position relationship of the instruction such as term " interior " and " outer "
For based on orientation shown in the drawings or position relationship, or the invention product using when the orientation usually put or position close
System, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must have
Specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " the
One ", " second " etc. is only used for distinguishing description, and it is not intended that instruction or hint relative importance.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of electric power meter, it is characterised in that the electric power meter includes the first current transformer, the second electric current
Transformer, electric energy meter and controller；
The first side winding of first current transformer is arranged at three phase network A phase lines, first current transformer
Secondary side winding includes the first head end tap, the first centre tap and first end tap, in the first head end tap, first
Between tap and first end tap be connected to the A phase current sampling port sets of the controller, the A phase currents of the controller are defeated
Exit port group is connected with the A phase current sampling port sets of the electric energy meter, and the controller is used to detect the First
When the current value of winding is located at the first preset threshold range between end tap and the first centre tap, the current value is sent to institute
Electric energy meter is stated, as A phase current sampling values, is detecting the electricity of winding between the first head end tap and the first centre tap
When flow valuve is located at the second preset threshold range, the current value of winding between the first head end tap and first end tap is sent out
The electric energy meter is delivered to, as A phase current sampling values；
The first side winding of second current transformer is arranged at three phase network C phase lines, second current transformer
Secondary side winding includes the second head end tap, the second centre tap and second end tap, in the second head end tap, second
Between tap and second end tap be connected to the C phase current sampling port sets of the controller, the C phase currents of the controller are defeated
Exit port group is connected with the C phase current sampling port sets of the electric energy meter, and the controller is additionally operable to detecting described second
When the current value of winding is located at three preset threshold ranges between head end tap and the second centre tap, by the current value send to
The electric energy meter, as C phase current sampling values, detecting winding between the second head end tap and the second centre tap
When current value is located at four preset threshold ranges, by the current value of winding between the second head end tap and second end tap
Send to the electric energy meter, as C phase current sampling values.
2. electric power meter according to claim 1, it is characterised in that it is mutual that the electric power meter also includes voltage
Sensor, the first side winding of the voltage transformer are connected to three-phase electricity circuit, and the secondary side winding of the voltage transformer connects
The voltage sample port group of the electric energy meter is connected to, the voltage sample value of the three-phase electricity of acquisition is sent to the electric energy
Table.
3. electric power meter according to claim 2, it is characterised in that the first side winding bag of the voltage transformer
The 3rd head end tap, the 3rd centre tap and the 3rd end tap are included, the 3rd head end tap is connected to the three phase network A
Phase line, the 3rd centre tap are connected to three phase network B phase lines, and the 3rd end tap is connected to the three-phase electricity
Net C phase lines, the secondary side winding of the voltage transformer includes the first winding and the second winding, and first winding includes the
Four head end taps, the 4th centre tap and the 4th end tap, the 4th head end tap, the 4th centre tap and the 4th end
Tap is connected to the voltage sample port group of the electric energy meter, and second winding includes the 5th head end tap and the 5th end is taken out
Head, the 5th head end tap and the 5th end tap are connected to the supply port group of the controller.
4. electric power meter according to claim 2, it is characterised in that the electric power meter also includes collection eventually
End, the acquisition terminal are connected with the electric energy meter, for obtaining the electric energy meter according to the A phase current samplings value, C phases electricity
Flow sampled value, and the electric energy metrical that the voltage sample value obtains.
5. electric power meter according to claim 1, it is characterised in that the electric power meter is arranged in cabinet
Portion, the cabinet include cabinet door, and the electric power meter also includes electromagnetism lock ＆ key read head, and the electromagnetism lock ＆ key is read
Head is connected with the controller respectively, and the electromagnetic lock is used to lock the cabinet door, and the key read head can be read effectively
The open signal that electron key is sent, and send to the controller, so that the controller controls the electromagnetic lock to open.
6. electric power meter according to claim 5, it is characterised in that the three-phase electricity circuit is set close to user side
There is high-voltage switch gear, the high-voltage switch gear is connected with the controller, and the electric power meter also includes connecting with the controller
The cabinet door sensor connect, the cabinet door sensor is used for the folding condition information for detecting the cabinet door, and sends to the control
Device, the controller is additionally operable to do not receiving the open signal, but judges the cabinet door according to the folding condition information
To generate alert data during opening, and the high-voltage switch gear is controlled to operate a switch, to cut off user's power supply.
7. electric power meter according to claim 6, it is characterised in that the electric power meter also includes collection eventually
End, the acquisition terminal is connected with the controller, for obtaining the folding condition information of the cabinet door, and the alarm number
According to.
8. electric power meter according to claim 1, it is characterised in that first current transformer, the second electric current
Transformer and voltage transformer are integrated in one, to form Combined type power transformer.
9. a kind of power supply management system, it is characterised in that the power supply management system includes server and claim 1~8 times
Electric power meter described in meaning one, the electric power meter and the server communication.
10. power supply management system according to claim 9, it is characterised in that the electric power meter is provided with wirelessly
Transmitting device, the electric power meter pass through the radio transmitting device and the server communication, the radio transmitting device
For GPRS wireless transport modules.
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| CN201710896181.4A CN107561326B (en) | 2017-09-27 | 2017-09-27 | Electric energy metering device and power supply management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710896181.4A CN107561326B (en) | 2017-09-27 | 2017-09-27 | Electric energy metering device and power supply management system |
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| CN107561326B CN107561326B (en) | 2024-01-30 |
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| CN114441827A (en) * | 2021-12-22 | 2022-05-06 | 新疆升晟股份有限公司 | Method for measuring current at low-voltage end of electric furnace transformer |
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