CN104267369B - Separation achieving method for single-phase-three-phase electric energy meter compatible calibration voltage system - Google Patents
Separation achieving method for single-phase-three-phase electric energy meter compatible calibration voltage system Download PDFInfo
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- CN104267369B CN104267369B CN201410376520.2A CN201410376520A CN104267369B CN 104267369 B CN104267369 B CN 104267369B CN 201410376520 A CN201410376520 A CN 201410376520A CN 104267369 B CN104267369 B CN 104267369B
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Abstract
The invention discloses a separation achieving method for a single-phase-three-phase electric energy meter compatible calibration voltage system. The separation achieving method includes the following steps: A, the output of a three-phase power source serves as the unique power source; B, an independent three-phase power supply system is firstly formed by the three-phase power source, three-phase meter hanging bases and a three-phase standard meter; C, a switching relay K0 is additionally arranged in the A-phase voltage output UA of the power source; D, a switching relay K1 is additionally arranged in the voltage output UN of the power source; E, a switching relay K2 is additionally arranged in the A-phase voltage input UA of the standard meter. By means of the separation achieving method, as the four relays and a voltage isolation mutual inductor necessary in a single-phase system are additionally arranged, two independent power supply systems including the three-phase electric energy meter power supply system and the single-phase electric energy meter power supply system are generated through the same set of power source and standard meter.
Description
Technical field
The invention belongs to electricity field, more particularly, to Single three-phase electric energy meter field tests.
Background technology
At present power consumer is when carrying out electric energy meter laboratory verification, need to configure simultaneously equipment for three-phase electrical energy meter and
Single-phase electric energy meter calibrating installation, the space to laboratory and lab construction expense bring certain puzzlement, and the method is pin
Concentration calibrating is carried out to two kinds of electric energy meters, realizes compatible calibrating single-phase electric energy on the basis of an equipment for three-phase electrical energy meter
Table, mainly solves compatibility issue during two kinds of table switchings.
The program can reduce the requirement to lab space, reduce lab construction cost simultaneously.
Content of the invention
Realize the compatible calibrating of Single three-phase electric energy meter, mainly solve how to realize the voltage of monophase system in three-phase system
Separate, simultaneously after isolation when realizing single-phase electric energy meter calibrating, do not affect the normal work of three-phase system.
Single three-phase electric energy meter compatible calibrating electrical voltage system separation solution, comprises the following steps:
A: three phase power source is exported as unique power supply source；
B: first independent three-phase power supply system is formed by three phase power source and three-phase pocket watch seat and three-phase standard scale；
C: add switching relay k0 in a phase voltage output ua of power source；
D: add switching relay k1 in voltage output un of power source；
E: add switching relay k2 in a phase voltage input ua of standard scale；
F: add switching relay k3 in control source un of standard scale；
G: the power source output after switching is accessed a secondary input end of the isolation pt newly increasing；
H: each output winding of the secondary output end of isolation pt is connected in each epi-position；
I: the separation realizing single three-phase voltage system by switching k0～k3 uses.
In step g of the present invention, increased isolation pt is required to include: possess the characteristic of multiple-channel output, want can simultaneously
Meet the requirement needed for calibrating installation accuracy class, as requested, the grade of newly-increased isolation pt is not less than 0.1%.
Independent single-phase voltage system wiring terminal to be reserved in each epi-position in step h of the present invention, be single-phase electricity
The incision of pressure system provides port.
Electrical voltage system switching relay k0～k3 used in step i of the present invention is single-pole double-throw relay, 4
The control of relay can be as coordinated signals it is also possible to independently be controlled.
The detached implementation that step i of the present invention realizes single three-phase voltage system by switching k0～k3 includes
Following steps:
E10:k0～k1 switching relay normal-closed end is both connected to be connected to a of three-phase pocket watch seat in three-phase voltage system
In phase voltage；
E11:k2～k3 switching relay normal-closed end is attached with the normal-closed end of k0 and k1；
E12:k0～k1 switches the secondary input end that relay normally open end is connected to isolation pt；
E13:k2～k3 switches the voltage end that relay normally open terminates the first epi-position into single-phase voltage system；
E14: when examining and determine three-phase electric energy meter, control the normal-closed end closure of k0～k3, realize three-phase voltage electric power system
Conducting, simultaneously switches off the power supply of monophase system；
E15: when examining and determine single-phase electric energy meter, control the normally opened end closure of k0～k3, realize single-phase voltage electric power system
Conducting, simultaneously switches off the power supply of three-phase system；
E16: realize the mutual switching of single three-phase voltage system by the step of e14 and e15.
Step e10 of the present invention～e13 guarantees that single phase power supply system and three-phase power supply system can carry out independent control, is
Compatible use provides feasibility to support.
Beneficial effects of the present invention: the method pass through to increase in 4 relays and monophase system necessary voltage every
From transformer, realize utilizing same set of power source and standard scale, produce two independent electric power system three-phase electric energy meters and supply
Electric system and single-phase electric energy meter electric power system.
Brief description
Fig. 1 is single three-phase voltage system switching connection figure used in the present invention.
Specific embodiment
Single three-phase electric energy meter compatible calibrating electrical voltage system separation solution, comprises the following steps:
A: three phase power source is exported as unique power supply source；
B: first independent three-phase power supply system is formed by three phase power source and three-phase pocket watch seat and three-phase standard scale；
C: add switching relay k0 in a phase voltage output ua of power source；
D: add switching relay k1 in voltage output un of power source；
E: add switching relay k2 in a phase voltage input ua of standard scale；
F: add switching relay k3 in control source un of standard scale；
G: the power source output after switching is accessed a secondary input end of the isolation pt newly increasing；
H: each output winding of the secondary output end of isolation pt is connected in each epi-position；
I: the separation realizing single three-phase voltage system by switching k0～k3 uses.
In step g of the present invention, increased isolation pt is required to include: possess the characteristic of multiple-channel output, want can simultaneously
Meet the requirement needed for calibrating installation accuracy class, as requested, the grade of newly-increased isolation pt is not less than 0.1%.
Independent single-phase voltage system wiring terminal to be reserved in each epi-position in step h of the present invention, be single-phase electricity
The incision of pressure system provides port.
Electrical voltage system switching relay k0～k3 used in step i of the present invention is single-pole double-throw relay, 4
The control of relay can be as coordinated signals it is also possible to independently be controlled.
The detached implementation that step i of the present invention realizes single three-phase voltage system by switching k0～k3 includes
Following steps:
E10:k0～k1 switching relay normal-closed end is both connected to be connected to a of three-phase pocket watch seat in three-phase voltage system
In phase voltage；
E11:k2～k3 switching relay normal-closed end is attached with the normal-closed end of k0 and k1；
E12:k0～k1 switches the secondary input end that relay normally open end is connected to isolation pt；
E13:k2～k3 switches the voltage end that relay normally open terminates the first epi-position into single-phase voltage system；
E14: when examining and determine three-phase electric energy meter, control the normal-closed end closure of k0～k3, realize three-phase voltage electric power system
Conducting, simultaneously switches off the power supply of monophase system；
E15: when examining and determine single-phase electric energy meter, control the normally opened end closure of k0～k3, realize single-phase voltage electric power system
Conducting, simultaneously switches off the power supply of three-phase system；
E16: realize the mutual switching of single three-phase voltage system by the step of e14 and e15.
Step e10 of the present invention～e13 guarantees that single phase power supply system and three-phase power supply system can carry out independent control, is
Compatible use provides feasibility to support.
Accompanying drawing 1 is the detached theory diagram of electrical voltage system, is realized from three-phase system by increasing by 4 single-pole double-throw relay
In isolate single-phase voltage system, in each epi-position, single-phase voltage interface is physically separated with three-phase voltage interface simultaneously,
It is effectively isolated switching by what control relay realized two power-supply systems.
When carrying out three-phase electric energy meter calibrating, 4 relays of increase are all in normal-closed end connection status, now three-phase work(
Rate source voltage a phase directly enters in the three-phase pocket watch seat of each epi-position by the normal-closed end of relay k0 and k1, and in addition two-phase is straight
Tap into the three-phase pocket watch seat into each epi-position, the power voltage supply realizing three-phase electric energy meter requires；The sampled voltage of standard scale simultaneously
K2/k3 and direct-connected circuit are passed through in end, realize the monitoring to power source output.
When carrying out single-phase electric energy meter calibrating, 4 relays of increase are switched to normally opened end connection status, single-phase examining and determine
When power source control a phase voltage output, in addition two phase controls close.Because k0 and k1 is in normally opened end connection status, a phase voltage
Isolation pt is entered by relay normally open end, cuts off the voltage signal of three-phase voltage terminal simultaneously, realize monophase system is isolated
The purpose of power supply；Standard scale is switched to secondary end (the first epi-position single-phase voltage of isolation pt by k2 and k3 relay simultaneously
End), and then realize the monitoring to single phase power supply system.
By in same experimental rig, realizing single-phase electronic energy meter and three phases electronic energy meter electric power system
Compatible calibrating；When solving the compatible calibrating of Single three-phase electric energy meter, how to realize the free switching of two systems supply voltage；Pass through
Description of the invention, after this method, can save a set of power source and standard scale, reduce lab construction cost；Simultaneously
Realization for Campatible electric energy meter calibrating apparatus provides strong support.
Claims (4)
1. Single three-phase electric energy meter compatible calibrating electrical voltage system separation solution is it is characterised in that comprise the following steps:
A: three phase power source is exported as unique power supply source；
B: first independent three-phase power supply system is formed by three phase power source and three-phase pocket watch seat and three-phase standard scale；
C: add switching relay k0 in a phase voltage output ua of power source；
D: add switching relay k1 in voltage output un of power source；
E: add switching relay k2 in a phase voltage input ua of standard scale；
F: add switching relay k3 in control source un of standard scale；
G: the power source output after switching is accessed a secondary input end of the isolation pt newly increasing；
H: each output winding of the secondary output end of isolation pt is connected in each epi-position；
I: the separation realizing single three-phase voltage system by switching k0～k3 uses；
The detached implementation that step i realizes single three-phase voltage system by switching k0～k3 comprises the following steps:
The a phase that e10:k0～k1 switching relay normal-closed end is both connected to be connected to three-phase pocket watch seat in three-phase voltage system is electric
In pressure；
E11:k2～k3 switching relay normal-closed end is attached with the normal-closed end of k0 and k1；
E12:k0～k1 switches the secondary input end that relay normally open end is connected to isolation pt；
E13:k2～k3 switches the voltage end that relay normally open terminates the first epi-position into single-phase voltage system；
E14: when examining and determine three-phase electric energy meter, control the normal-closed end closure of k0～k3, realize the conducting of three-phase voltage electric power system,
Simultaneously switch off the power supply of monophase system；
E15: when examining and determine single-phase electric energy meter, control the normally opened end closure of k0～k3, realize the conducting of single-phase voltage electric power system,
Simultaneously switch off the power supply of three-phase system；
E16: realize the mutual switching of single three-phase voltage system by the step of e14 and e15.
2. according to claim 1 Single three-phase electric energy meter compatible calibrating electrical voltage system separation solution it is characterised in that institute
The grade stating newly-increased isolation pt in step g is not less than 0.1%.
3. Single three-phase electric energy meter is compatible according to claim 1 examines and determine electrical voltage system separation solution it is characterised in that walking
Independent single-phase voltage system wiring terminal to be reserved in each epi-position, the incision for single-phase voltage system provides port in rapid h.
4. according to claim 1 Single three-phase electric energy meter compatible calibrating electrical voltage system separation solution it is characterised in that institute
The electrical voltage system switching relay k0～k3 stating used in step i is single-pole double-throw relay, and the control of 4 relays can
As coordinated signals or independently control.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105301553A (en) * | 2015-12-01 | 2016-02-03 | 国家电网公司 | Multipurpose single/three-phase electric energy meter detector |
| CN105487041A (en) * | 2015-12-28 | 2016-04-13 | 云南电网有限责任公司电力科学研究院 | Electric energy metering device performance detection system |
| CN106199486A (en) * | 2016-06-27 | 2016-12-07 | 山东省计量科学研究院 | A kind of measurement system of power meter temperature impact test |
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