CN108196120A - A kind of high-voltage bidirectional metering electric energy meter - Google Patents
A kind of high-voltage bidirectional metering electric energy meter Download PDFInfo
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- CN108196120A CN108196120A CN201810175341.0A CN201810175341A CN108196120A CN 108196120 A CN108196120 A CN 108196120A CN 201810175341 A CN201810175341 A CN 201810175341A CN 108196120 A CN108196120 A CN 108196120A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
Abstract
The present invention relates to a kind of high-voltage bidirectional metering electric energy meters, its main feature is that, three high pressure phase lines are respectively connected to take electrical circuit, access voltage sample and signal conditioning circuit simultaneously, it is sent after sampled conditioning to bidirectional measuring circuit, two current sensors are separately installed on three phase lines, the forward direction and negative-phase sequence curent of three phase lines are sampled respectively, sampled signal accesses current signal conditioning circuit, also bidirectional measuring circuit is given after conditioned, bidirectional measuring circuit is divided into positive metering circuit and reversed metering circuit, the forward and reverse electric flux of each phase line is measured respectively, microcontroller circuit connects and controls bidirectional measuring circuit respectively, output of pulse signal circuit, telecommunication circuit, display circuit.The present invention is realized the bidirectional measuring of high voltage electric energy by a high-voltage electric energy meter, and simple and reliable capacitance partial pressure is taken to take electricity, and high-tension circuit is effectively isolated, and shield the interference of strong power frequency magnetic field with light current circuit in table, reduces the eddy-current heating effect of shielding box.
Description
Technical field
The present invention relates to a kind of electric energy measurement instruments, in particular a kind of electric energy meter for high voltage electric energy bidirectional measuring.
Background technology
The new energy being connected to the grid（Photovoltaic, wind-powered electricity generation）System, both with power supply characteristic, it may have load characteristic, thus
Bi-directional current can be formed in Medial ＆ Low Voltage Power Network and high-voltage fence.For example, when grid-connected photovoltaic system output power is more than locally
During the power of load consumption, photovoltaic system can be by extra electric energy feed-in power grid；If photovoltaic system output power is less than local load
The power of consumption can then take electricity from power grid, i.e., photovoltaic system and power grid are simultaneously to local load supplying.For this purpose, to high voltage electric energy
Table just proposes the actual requirement of bidirectional measuring.It is required that high-voltage electric energy meter is multiple functional, forward and reverse error, precision are consistent, can divide
Not Ji Lu feed-in power grid electric energy and take the electric energy of consumption away from power grid, and can measure simultaneously active power, power factor, effectively
The parameters such as voltage, effective current, thus for administration of power networks side, new energy operator's real time inspection new-energy grid-connected operation conditions,
Measurement basis is established in analysis and research in time, control adjustment power transmission and distribution and electricity charge accounting.
Invention content
The object of the present invention is to provide a kind of high-voltage electric energy meters that can carry out bidirectional measuring.
To achieve the above object, the technical scheme is that, a kind of high-voltage bidirectional metering electric energy meter, composition includes,
Take electrical circuit, current sensor, voltage sample and signal conditioning circuit, current signal conditioning circuit, bidirectional measuring circuit, micro-control
Device circuit processed, output of pulse signal circuit, telecommunication circuit, display circuit and watch shell, it is characterised in that：Three-phase high-voltage circuit connects
Enter and take electrical circuit, while also access voltage sample and signal conditioning circuit, bidirectional measuring circuit, three-phase are given after sampled conditioning
Two current sensors are separately installed in each phase line of high-tension line, the forward direction and negative-phase sequence curent to the phase line are adopted respectively
Sample, the sampled signal access current signal conditioning circuit of each current sensor, also gives bidirectional measuring circuit after conditioned, two-way
Metering circuit receives the voltage parameter signal from voltage sample and signal conditioning circuit and is improved from current signal simultaneously
The current parameters signal of circuit, bidirectional measuring circuit point are independent positive metering circuit and reversed metering circuit, measure respectively
The forward and reverse electric flux of each phase high-tension line, microcontroller circuit connects and controls bidirectional measuring circuit, pulse output electricity
Road, telecommunication circuit and display circuit.
In the above-mentioned technical solutions, it is described that electrical circuit is taken to be made of bleeder circuit and rectification filtering voltage stabilizing circuit, partial pressure electricity
Road takes electrical circuit and high pressure phase line using capacitance partial pressure circuit or voltage transformer bleeder circuit or resistor voltage divider circuit
Tie point is located in the phase line between two current sensors.
In the above-mentioned technical solutions, the voltage sample and signal conditioning circuit are by pressure sampling circuit and amplitude limit and filtering
Lattice network is formed, and pressure sampling circuit is using resistor voltage divider circuit sampled voltage signal or uses capacitance partial pressure circuit sampling
Voltage signal or using voltage transformer bleeder circuit come sampled voltage signal, pressure sampling circuit and the connection of high pressure phase line
Point is located in the phase line between two current sensors.
In the above-mentioned technical solutions, the current sensor is current transformer or current diverter or magneto-optic effect sensing
Device or Hall sensor.
In the above-mentioned technical solutions, the current signal conditioning circuit is made of amplitude limiter circuit and filtering netwok, electricity
Stream signal conditioning circuit is divided into forward current signal conditioning circuit and reverse current signal modulate circuit, in forward current signal
In modulate circuit, forward current signal is handled through amplitude limiter circuit and filtering netwok, then is transported to the electricity of positive metering circuit
Signal input part is flowed, similarly, in reverse current signal modulate circuit, reverse current signal is through amplitude limiter circuit and filter network electricity
Road is handled, then is transported to the current signal input of reversed metering circuit.
In the above-mentioned technical solutions, the computation chip employed in the positive metering circuit and reversed metering circuit is
ATT7022E。
In the above-mentioned technical solutions, shielding box is additionally provided with inside the watch shell, it is electric except electrical circuit, voltage sample is taken
Other circuits except road, current transformer are placed in the shielding box, which is made of single-layer or multi-layer permeability magnetic material,
Its surface is provided with several apertures, and small aperture is 2 millimeters to 5 millimeters, for reducing eddy-current heating.
Advantages of the present invention,
1. the bidirectional measuring function of high voltage electric energy is realized by a high-voltage electric energy meter.
2. capacitance partial pressure is taken to take electricity or voltage transformer is taken to take electricity, it is simple and reliable.
3. watch shell inner space connection and reasonable arrangement is compact, high-tension line is effectively isolated with light current circuit.
4. set shielding box fully takes into account the shielding to strong power frequency magnetic field and reduces shielding box itself in watch shell
Eddy-current heating effect.
Description of the drawings
Fig. 1 is the embodiment of the present invention one, the system structure diagram of three-phase and four-line connection.
Fig. 2 is the embodiment of the present invention one, and three-phase and four-line connection capacitance partial pressure takes electrical circuit schematic diagram.
Fig. 3 is the embodiment of the present invention one, and the voltage sample and signal conditioning circuit of three-phase and four-line connection electric resistance partial pressure are illustrated
Figure.
Fig. 4 is the embodiment of the present invention one, three-phase and four-line connection current signal conditioning circuit schematic diagram.
Fig. 5 is the embodiment of the present invention one, and watch shell internal structure arranges schematic diagram.
Fig. 6 is the embodiment of the present invention two, the system structure diagram of phase three-wire three connection.
Fig. 7 is the embodiment of the present invention two, and phase three-wire three connection capacitance partial pressure takes electrical circuit schematic diagram.
Fig. 8 is the embodiment of the present invention two, the voltage sample and signal conditioning circuit of phase three-wire three connection electric resistance partial pressure.
In the figures above, 101 be that take electrical circuit, CTA1 be A phase line forward current mutual inductors, and CTA2 is that A phase lines are reversely electric
Current transformer, CTB1 are one of B phase line forward current mutual inductors, and CTB2 is that two, CTC1 of B phase line reverse current mutual inductors is C
One of phase line forward current mutual inductor, CTC2 are the two of C phase line reverse current mutual inductors, and 102 be voltage sample and signal condition
Circuit, 103 be current signal conditioning circuit, and 104 be bidirectional measuring circuit, and 105 be microcontroller circuit, and 106 be pulse signal
Output circuit, 107 be telecommunication circuit, and 108 be display circuit, and 109 be rectification filtering voltage stabilizing circuit, and 110 be amplitude limit and filtering net
Network circuit, 111 be bidirectional measuring circuit voltage signal input part, and 112 be amplitude limit and filtering netwok, and 113 be positive metering
Circuit current signal input terminal, 114 be reversed metering circuit current signal input, and 120 be watch shell, and 121 be to take electrical circuit,
122 be voltage sampling circuit, and 123 be anti-vortex aperture, and 124 be shielding box, and 125 be current transformer, and 200 be watch shell,
201 be that take electrical circuit, CTA1 be A phase line forward current mutual inductors, and CTA2 is A phase line reverse current mutual inductors, and CTC1 is C phase lines
Forward current mutual inductor, CTC2 are C phase line reverse current mutual inductors, and 202 be voltage sample and signal conditioning circuit, and 203 be electricity
Signal conditioning circuit is flowed, 204 be bidirectional measuring circuit, and 205 be microcontroller circuit, and 206 be output of pulse signal circuit, 207
It is telecommunication circuit, 208 be display circuit, and 209 be rectification filtering voltage stabilizing circuit, and 210 be amplitude limit and filtering netwok, and 211 are
Bidirectional measuring circuit voltage signal input part.
Specific embodiment
Embodiment one, the present embodiment are the high-voltage bidirectional metering electric energy meter using three-phase and four-line connection, composition and wiring
Mode is as shown in Figure 1.
In the present embodiment, ABC three-phase high-voltage circuits are respectively connected to take electrical circuit 101 and voltage sample and modulate circuit
102, electrical circuit 101, voltage sample and modulate circuit 102 and the tie point of high pressure phase line is taken to be located at two electric currents in the phase line and pass
Between sensor, referring to attached drawing 1.Electrical circuit is taken to be made of capacitance partial pressure circuit and rectification filtering voltage stabilizing circuit 109, such as 2 institute of attached drawing
Show, three phase line high pressure conversions are voltage required for electric energy meter working power by the capacitance partial pressure circuit that three serial capacitors groups are formed.
Voltage sample and signal conditioning circuit 102 are made of pressure sampling circuit and amplitude limit with filtering netwok 110, such as 3 institute of attached drawing
Show, pressure sampling circuit carrys out sampled voltage signal with electric resistance partial pressure, and sampled voltage signal is improved through amplitude limit and filtering netwok
Afterwards, it send to the voltage signal inputs 111 of bidirectional measuring circuit 104.On A phase lines installation there are two Current Transmit A1 and
There are two installation on Current Transmit B1 and CTB2, C phase line, there are two current transformers for installation on CTA2, B phase line
CTC1 and CTC2, Current Transmit A1, CTB1, CTC1 sample the forward current in ABC three-phase lines respectively, Current Mutual Inductance
Device CTA2, CTB2, CTC2 sample the reverse current in ABC three-phase lines respectively, the sampled signal access of each current transformer
Current signal conditioning circuit 103, the current signal conditioning circuit 103 are made of amplitude limiter circuit and filtering netwok 112, such as attached
Shown in Fig. 4, current signal conditioning circuit is divided into forward current signal conditioning circuit and reverse current signal modulate circuit, just
Into current signal conditioning circuit, the forward current signal from Current Transmit A1, CTB1, CTC1 is through amplitude limiter circuit and filter
Wave network processing of circuit, then positive metering circuit current signal input 113 is transported to, similarly, improved in reverse current signal
In circuit, the reverse current signal from Current Transmit A2, CTB2, CTC2 through amplitude limiter circuit and filtering netwok at
Reason, then it is transported to the current signal input 114 of reversed metering circuit.Bidirectional measuring circuit 104 receives to adopt from voltage simultaneously
Current parameters signal of the sample with the voltage parameter signal of signal conditioning circuit 102 and from current signal conditioning circuit 103, it is double
It is divided into metering circuit 104 and is independent positive metering circuit and reversed metering circuit, in positive metering circuit and reversely metering
In circuit, two model ATT7022E computation chips are respectively adopted to measure the forward and reverse of each phase high-tension line electricity respectively
Energy, microcontroller circuit 105 connects and controls bidirectional measuring circuit 104 respectively, output of pulse signal circuit 106, communication electricity
Road 107, display circuit 108.Microcontroller circuit 105 acquires and stores the meter that positive computation chip and reversed computation chip transmit
Data are measured, send to display circuit 108 and shows, and manage telecommunication circuit 107 and communicate with external equipment, management pulse signal is defeated
Go out 106 output pulse signal of circuit.
In the present embodiment, watch shell interior arrangement structure as shown in Figure 5, is additionally provided with shielding inside watch shell 120
Box 124, other circuits in addition to electrical circuit 121, voltage sampling circuit 122, current transformer 125 is taken are placed in the shielding box
In 124, which is made of single-layer or multi-layer irony permeability magnetic material, and surface is provided with several apertures 123, aperture hole
Diameter is 4 millimeters, shielding box 124 can effectively shield high-voltage electric energy meter nearby strong power frequency magnetic field to shielding box internal electronic component
With the interference of electronic circuit, while on shielding box set aperture 123, strong power frequency magnetic field can be effectively reduced and act on irony screen
Cover the eddy-current heating effect on box body.
In the present embodiment, take electrical circuit employ from three high pressure phase lines power on hold partial pressure mode take electricity, such as 2 institute of attached drawing
Show.Practical takes electrical circuit that can also only be taken from a high pressure phase line or from two high pressure phase lines using capacitance partial pressure mode
Electricity.From at least one high pressure phase line electricity can also be taken by the way of electric resistance partial pressure or voltage transformer partial pressure.
Embodiment two, the present embodiment are the high-voltage bidirectional metering electric energy meter using phase three-wire three connection.It is formed and wiring
Mode is as shown in Figure 6.
In the present embodiment, ABC three-phase high-voltages circuit is respectively connected to take electrical circuit 201 and voltage sample and modulate circuit
202, electrical circuit 201, voltage sample and modulate circuit 202 and the tie point of high pressure phase line is taken to be located at two electric currents in the phase line and pass
Between sensor, referring to attached drawing 6.Electrical circuit 201 is taken to be made of capacitance partial pressure circuit and rectification filtering voltage stabilizing circuit 209, such as attached drawing 7
Shown, voltage reference points of the B phases as system, the capacitance partial pressure circuit that two serial capacitors groups are formed is by A phase lines and C phase line high voltage variables
Voltage required for being changed to electric energy meter working power.Voltage sample and signal conditioning circuit 202 by pressure sampling circuit and amplitude limit with
Filtering netwok 210 is formed, and as shown in Figure 8, pressure sampling circuit comes sampled voltage signal, sampled voltage with electric resistance partial pressure
Signal is sent after amplitude limit and filtering netwok 210 improve to the metering circuit voltage signal inputs of bidirectional measuring circuit 204
211.There are two installation on Current Transmit A1 and CTA2, C phase line, there are two Current Transmit C1 for installation on A phase lines
And CTC2, Current Transmit A1, CTC1 sample the forward current in A phase lines and C phase lines respectively, current transformer
CTA2, CTC2 sample the reverse current in A phase lines and C phase lines respectively, the sampled signal access electricity of each current transformer
Signal conditioning circuit 203 is flowed, current signal conditioning circuit 203 is made of amplitude limiter circuit and filtering netwok, such as 4 institute of attached drawing
Show, current signal conditioning circuit is divided into forward current signal conditioning circuit and reverse current signal modulate circuit, in positive electricity
Flow signal conditioning circuit in, the forward current signal from Current Transmit A1, CTC1 through amplitude limit and filtering netwok at
Reason, then the current signal input of positive metering circuit is transported to, similarly, in reverse current signal modulate circuit, from electricity
The reverse current signal of current transformer CTA2, CTC2 are handled through amplitude limit and filtering netwok, then are transported to reversed metering circuit
Current signal input, bidirectional measuring circuit 204 receives the voltage from voltage sample and signal conditioning circuit 202 and joins simultaneously
Number signal and the current parameters signal from current signal conditioning circuit 203, it is mutual indepedent that bidirectional measuring circuit 204, which is divided into,
Positive metering circuit and reversed metering circuit, in positive metering circuit and reversed metering circuit, two models are respectively adopted
Measure the forward and reverse electric flux of each phase high-tension line respectively for ATT7022E computation chips.Microcontroller circuit 205 divides
It does not connect and controls bidirectional measuring circuit 204, output of pulse signal circuit 206, telecommunication circuit 207, display circuit 208.Micro-control
Device circuit 205 processed acquires and stores the continuous data that positive computation chip and reversed computation chip transmit, and send to display circuit 208
It has been shown that, and manage telecommunication circuit 207 and communicate with external equipment, 206 output pulse signal of management output of pulse signal circuit.
In the present embodiment, current signal conditioning circuit is as in the first embodiment, referring to attached drawing 4, due to being phase three-wire three connection, B
Voltage reference points of the phase line as system, Current Transmit B1 and CTB2 are not needed to corresponding amplitude limit and filter network electricity
The sample rate current of road conveying forward or backwards.
In the present embodiment, take electrical circuit employ from two high pressure phase lines power on hold partial pressure mode take electricity, such as 7 institute of attached drawing
Show.Practical takes electrical circuit only can also take electricity using capacitance partial pressure mode from a high pressure phase line.It can also be from least one
In high pressure phase line electricity is taken by the way of electric resistance partial pressure or voltage transformer partial pressure.
In the present embodiment, watch shell internal component and circuit configuration are as in the first embodiment, not repeated description herein.
Claims (8)
1. a kind of high-voltage bidirectional metering electric energy meter, composition includes, and takes electrical circuit, current sensor, voltage sample and signal tune
Manage circuit, current signal conditioning circuit, bidirectional measuring circuit, microcontroller circuit, output of pulse signal circuit, telecommunication circuit,
Display circuit and watch shell, it is characterised in that：The access of three-phase high-voltage circuit takes electrical circuit, while also accesses voltage sample and signal
Modulate circuit gives bidirectional measuring circuit, two is separately installed in each phase line of three-phase high-voltage circuit after sampled conditioning
Current sensor, forward direction and negative-phase sequence curent to the phase line sample respectively, the sampled signal access electric current of each current sensor
Signal conditioning circuit, also gives bidirectional measuring circuit after conditioned, bidirectional measuring circuit receives simultaneously from voltage sample and letter
The voltage parameter signal of number modulate circuit and the current parameters signal from current signal conditioning circuit, bidirectional measuring circuit point
Positive metering circuit and reversed metering circuit are independent, measures the forward and reverse electric flux of each phase high-tension line respectively, it is micro-
Controller circuitry connects and controls bidirectional measuring circuit, impulse output circuit, telecommunication circuit and display circuit.
2. a kind of high-voltage bidirectional metering electric energy meter according to claim 1, it is characterised in that：It is described to take electrical circuit by dividing
Circuit and rectification filtering voltage stabilizing circuit are formed, bleeder circuit using capacitance partial pressure circuit or voltage transformer bleeder circuit or
Resistor voltage divider circuit takes electrical circuit and the tie point of high pressure phase line to be located in the phase line between two current sensors.
3. a kind of high-voltage bidirectional metering electric energy meter according to claim 1, it is characterised in that：The voltage sample and signal
Modulate circuit is made of pressure sampling circuit and amplitude limit with filtering netwok, and pressure sampling circuit is adopted using resistor voltage divider circuit
Sample voltage signal uses capacitance partial pressure circuit sampling voltage signal or using voltage transformer bleeder circuit come sampled voltage
The tie point of signal, pressure sampling circuit and high pressure phase line is located in the phase line between two current sensors.
4. a kind of high-voltage bidirectional metering electric energy meter according to claim 1, it is characterised in that：The current sensor is electricity
Current transformer or current diverter or magneto-optic effect sensor or Hall sensor.
5. a kind of high-voltage bidirectional metering electric energy meter according to claim 1, it is characterised in that：The current signal conditioning electricity
It route amplitude limiter circuit and filtering netwok to form, current signal conditioning circuit is divided into forward current signal conditioning circuit and anti-
To current signal conditioning circuit, in forward current signal conditioning circuit, forward current signal is through amplitude limiter circuit and filter network
Processing of circuit, then the current signal input of positive metering circuit is transported to, similarly, in reverse current signal modulate circuit,
Reverse current signal is handled through amplitude limiter circuit and filtering netwok, then is transported to the current signal input of reversed metering circuit
End.
6. a kind of high-voltage bidirectional metering electric energy meter according to claim 5, it is characterised in that：It is described forward direction metering circuit and
Computation chip employed in reversed metering circuit is ATT7022E.
7. a kind of high-voltage bidirectional metering electric energy meter according to claim 1, it is characterised in that：It is also set inside the watch shell
Shielding box is equipped with, other circuits in addition to electrical circuit, voltage sampling circuit, current transformer is taken are placed in the shielding box.
8. a kind of high-voltage bidirectional metering electric energy meter according to claim 7, it is characterised in that：The shielding box by individual layer or
Multilayer permeability magnetic material is made, and surface is provided with several apertures, and small aperture is 2 millimeters to 5 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175341.0A CN108196120A (en) | 2018-03-02 | 2018-03-02 | A kind of high-voltage bidirectional metering electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175341.0A CN108196120A (en) | 2018-03-02 | 2018-03-02 | A kind of high-voltage bidirectional metering electric energy meter |
Publications (1)
| Publication Number | Publication Date |
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| CN108196120A true CN108196120A (en) | 2018-06-22 |
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ID=62594823
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810175341.0A Pending CN108196120A (en) | 2018-03-02 | 2018-03-02 | A kind of high-voltage bidirectional metering electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812387A (en) * | 2020-09-04 | 2020-10-23 | 耕宇牧星(北京)空间科技有限公司 | Positive and negative voltage sampling shunt circuit |
-
2018
- 2018-03-02 CN CN201810175341.0A patent/CN108196120A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812387A (en) * | 2020-09-04 | 2020-10-23 | 耕宇牧星(北京)空间科技有限公司 | Positive and negative voltage sampling shunt circuit |
| CN111812387B (en) * | 2020-09-04 | 2021-02-05 | 耕宇牧星(北京)空间科技有限公司 | Positive and negative voltage sampling shunt circuit |
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Effective date of registration: 20210908 Address after: Room 516, building 1, Shengke international water affairs center, No. 33, Jiangxinzhou science and technology road, Jianye District, Nanjing, Jiangsu 210019 Applicant after: Jiangsu Yijia Energy Saving Technology Co.,Ltd. Address before: 211500 Room 201, building D1, No. 9, Kechuang Avenue, Zhongshan Science Park, Liuhe District, Nanjing, Jiangsu Province Applicant before: NANJING XIANGLU ENERGY TECHNOLOGY Co.,Ltd. |