CN106569170B - A kind of metering device secondary circuit detector and its detection method - Google Patents
A kind of metering device secondary circuit detector and its detection method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention proposes that one kind can judge rapidly whether metering device secondary circuit has the detecting instrument of wiring exception, including secondary circuit route collet, test benchmark signal generation unit, test result signal sampling unit, test result detecting signal unit, display unit.The present invention obtains the test result signal of each phase connection using controllable alternating-current measurement reference signal is intersected, and the phase and its type of error of wiring error are determined by being compared with nominal value.The present invention takes out stitches without energization on-load or power failure and checks by root, can quickly position the false wiring in the types electric energy meter such as phase three-wire three, and judge wiring error type, easy to operate, time saving and energy saving.
Description
Technical field
The present invention relates to power measurement technical field more particularly to a kind of metering device secondary circuit detector and its detections
Method.
Background technique
Electric energy metering device towards power supply line mainly includes voltage transformer, current transformer, secondary circuit and electricity
It can table.Voltage transformer and current transformer by power supply line load current and load voltage be changed into normalized current and
Electric energy meter is provided to respectively after normal voltage to be measured.The secondary terminals of voltage transformer and current transformer are to electric energy meter
The connection circuit of table tail, the referred to as secondary circuit of electric energy metering device.
Guarantee that second loop return wiring is correctly the premise that electric energy meter accurately measures electricity consumption.But in reality, misconnection
The case where line, emerges one after another.Under error connection state, even if electric energy meter accuracy and reliability itself is very high, also it cannot achieve correct
Metering, it is also possible to bring the risk of equipment damage.
The high-pressure system of general 10kV or more is all made of the power supply mode of phase three-wire three, so high-pressure system mostly uses greatly
Three-phase three-wire electric energy meter measures electric energy.The wiring of three-phase three-wire electric energy meter is relatively more, and the chance of misconnection is larger, including short circuit, open
The problems such as road, mutual inductor generation line reversal and string phase, voltage transformer and current transformer are obscured.Three-phase three-wire electric energy meter is wrong
Electric energy meter will generate many abnormal operation phenomenons when wiring: not turning sometimes, invert sometimes, sometimes with the power-factor of load
The variation at angle rotates forward reversion alternating, although what is had rotates forward, the electricity number measured is not consistent with practical.Due to voltage transformer
Voltage phase sequence can judge that a possibility that mistake is smaller by phase-sequence meter, but current transformer occurs line reversal and goes here and there the showing of phase
As in practical projects than more prominent.Moreover, the installation space of electric energy metering device especially mutual inductor room installation space is narrow,
Big inconvenience is brought to inspection wiring and misconnection line analysis.
Line inspection mode mainly has energization on-load to detect and have a power failure and detects by root line to core at present, there is certain limitation
Property, and it is time-consuming and laborious.The detection of energization on-load samples extraction electricity from the primary side and secondary side of mutual inductor using tester respectively
Stream, voltage value carry out verification calculating, and the counting of the variable of tester and electric energy meter are compared, it can be found that secondary
Mistake present in circuit, but wiring wrong in secondary circuit cannot be directly positioned, it is also not susceptible to determine in secondary circuit
The type of wiring error.Have a power failure to detect core by root line and after power failure dismantle secondary circuit terminal, with multimeter to core inspection,
It is time-consuming and laborious when operation, and detection effect is undesirable.
Summary of the invention
In view of above-mentioned problem above existing in the prior art, can judge rapidly to count it is an object of that present invention to provide one kind
Whether amount device secondary circuit has the detecting instrument of wiring exception, takes out stitches without energization on-load or power failure and checks by root, can
Quickly to position the false wiring in the types electric energy meter such as phase three-wire three, and judge wiring error type, easy to operate, time saving province
Power.
In order to reach above-mentioned target, the present invention provides a kind of metering device secondary circuit detectors, which is characterized in that packet
Include secondary circuit route collet, test benchmark signal generation unit, test result signal sampling unit, test result signal detection
Unit, display unit；Wherein, the secondary circuit route collet shares several, is respectively used to each mutual in connection secondary circuit
Each phase connection between sensor secondary side and electric energy meter input terminal；Each secondary circuit route collet is for connecting secondary circuit one
The wiring of phase, each secondary circuit route collet include test input mutual inductor, the first test output mutual inductor and the second survey
Try output mutual inductor；Wherein test input mutual inductor first siding ring be centered around the test input mutual inductor magnetic core on and
The test benchmark signal generation unit is connected, test input mutual inductor is secondary as its using each phase connection in secondary circuit
Side；The second siding ring of the first test output mutual inductor and the second test output mutual inductor is centered around described first respectively
On the magnetic core of test output mutual inductor and the second test output mutual inductor and it is connected to the test result signal sampling list
Member, the first test output mutual inductor and the second test output mutual inductor are using each phase connection in secondary circuit as one
Secondary side；The test benchmark signal generation unit is used to generate and inputs the primary side input test base of mutual inductor to the test
Calibration signal；The test result signal sampling unit tests output mutual inductor from the first test output mutual inductor and second
Second siding ring receive the test of each phase connection generated by the first test output mutual inductor and the second test output mutual inductor
Consequential signal；The test result signal of each phase connection is compared test result detecting signal unit with nominal value, judges it
In whether there is abnormal test result signal, and determine wiring phase corresponding with the exception of test result signal and wiring mistake
Accidentally type；The display unit is used to show the wiring phase and wiring error class that the test result detecting signal unit determines
Type.
Preferably, the test benchmark signal generation unit generates alternating-current measurement reference signal, and records the friendship
The reference voltage value and reference current value are supplied to test by the reference voltage value and reference current value of current test reference signal
Consequential signal detection unit.
Preferably, the first test output mutual inductor is by incuding the alternating-current measurement reference signal on each phase connection
Current value generates the current test results signal of each phase connection；The second test output mutual inductor is by incuding on each phase connection
The voltage value of alternating-current measurement reference signal generate the voltage tester consequential signal of each phase connection.
Preferably, the test result detecting signal unit is according to the current test results signal, voltage tester knot
Fruit signal and the phase angle of the two determine wiring phase corresponding with the exception of test result signal and wiring error type.
Preferably, the test benchmark signal generation unit controls defeated in each phase of secondary circuit according to predetermined scheme
The phase angle between alternating-current measurement reference signal entered.
The present invention provides a kind of detection method of metering device second loop return wiring in turn characterized by comprising will
Wiring connecting test input mutual inductor, the first test output mutual inductor and the second test output mutual inductance of each phase of secondary circuit
Device；Wherein, the first siding ring of test input mutual inductor is centered around on the magnetic core of test input mutual inductor, will be in secondary circuit
Each phase connection as test input mutual inductor secondary side；The first test output mutual inductor and the second test output are mutual
The second siding ring of sensor is centered around the magnetic core of the first test output mutual inductor and the second test output mutual inductor respectively
On, the primary of output mutual inductor is tested using each phase connection in secondary circuit as the first test output mutual inductor and second
Side；
Generate and input to the test primary side input test reference signal of mutual inductor；
It receives from the second siding ring of the first test output mutual inductor and the second test output mutual inductor by first
Test output mutual inductor and the second test output mutual inductor generate the test result signal of each phase connection；
The test result signal of each phase connection is compared with nominal value, whether judgement wherein has abnormal test knot
Fruit signal, and determine wiring phase corresponding with the exception of test result signal and wiring error type；
Wiring phase determined by showing and wiring error type.
It preferably, is alternating-current measurement benchmark to the test benchmark signal that the primary side of the test input mutual inductor inputs
Signal, and record the reference voltage value and reference current value of the alternating-current measurement reference signal.
Preferably, the alternating-current measurement reference signal on each phase connection is incuded by the first test output mutual inductor
Current value generates the current test results signal of each phase connection；Each phase connection is incuded by the second test output mutual inductor
On alternating-current measurement reference signal voltage value, generate the voltage tester consequential signal of each phase connection.
Preferably, it is determined according to the phase angle of the current test results signal, voltage tester consequential signal and the two
Wiring phase corresponding with the exception of test result signal and wiring error type.
Preferably, it is controlled according to predetermined scheme between the alternating-current measurement reference signal inputted in each phase of secondary circuit
Phase angle.
The present invention can quickly and efficiently detect the wiring error of ic for energy metering secondary circuit, and identify in the presence of wrong
Phase accidentally and type of error, so that the inspection maintenance for secondary circuit provides convenience；The present invention exchange controllable using intersection
Test benchmark signal, middle compared with the existing technology to be detected using actual power, controllability is high, and it is wrong to be applicable to all kinds of wiring
The accidentally investigation of situation；The present invention takes out stitches without energization on-load or power failure and checks by root, easy to operate, time saving and energy saving.
Figure of description
Fig. 1 is the structural schematic diagram of metering device secondary circuit detector of the present invention；
Fig. 2 is the secondary circuit route chuck structure schematic diagram of metering device secondary circuit detector of the present invention.
Specific embodiment
Below by embodiment, technical solution of the present invention is described in further detail.
Fig. 1 is the result schematic diagram of metering device secondary circuit detector of the present invention.It is with phase three-wire three in Fig. 1
Example, shows the circuit structure of electric energy metering device, and wherein L1 to L3 is the triple line of power supply line, current transformer C1, C2
And the primary side of voltage transformer U1, U2 are respectively connected to L1 to L3, the voltage and current signals obtained by induction are from above
The secondary side of mutual inductor C1, C2, U1, U2 are exported to electric energy meter B1, each phase connection connection mutual inductor C1, C2 in secondary circuit,
The secondary side and electric energy meter B1 of U1, U2.
Metering device secondary circuit detector of the invention includes secondary circuit route collet J1-J6, test benchmark signal
Generation unit G, test result signal sampling cell S, test result detecting signal unit R, display unit D.
Wherein, the secondary circuit route collet shares 6, be respectively used to connection secondary circuit in each mutual inductor C1, C2,
Each phase connection between the secondary side and electric energy meter input terminal of U1, U2, each secondary circuit route collet is for connecting secondary returning
The wiring of Lu Yixiang.Fig. 2 shows the structures of one of secondary circuit route collet, as shown in Fig. 2, each secondary loop wire
Road collet includes test input mutual inductor IH1, the first test output mutual inductor OH1 and the second test output mutual inductor OH2；With
The mutual inductor of upper secondary circuit route collet is all made of forcipated mutual-inductor, can be convenient be linked into secondary circuit each phase connection it
In.Wherein the first siding ring of test input mutual inductor IH1 is centered around on the magnetic core of test input mutual inductor IH1, and even
The test benchmark signal generation unit G is met, test input mutual inductor IH1 is secondary as its using each phase connection in secondary circuit
Side.The second siding ring of the first test output mutual inductor OH1 and the second test output mutual inductor OH2 are centered around institute respectively
It states on the magnetic core of the test of the first test output mutual inductor OH1 and second output mutual inductor OH2 and is connected to the test knot
Fruit signal sampling cell S, the first test output mutual inductor OH1 and second test output mutual inductor OH2 for secondary circuit
In each phase connection as its primary side.
The test benchmark signal generation unit G is used to generate and the primary side for inputting mutual inductor IH1 to the test is defeated
Enter test benchmark signal.The test benchmark signal that the test benchmark signal generation unit G is generated is alternating-current measurement reference signal,
And the reference voltage value and reference current value for recording the alternating-current measurement reference signal, by the reference voltage value and benchmark electricity
Flow valuve is supplied to test result detecting signal unit R.Alternating-current measurement reference signal is input to the primary of test input mutual inductor IH1
Side is input to each phase connection of secondary circuit by incuding, and simulates electric current and voltage letter that it is acquired from power supply line
Number.Test benchmark signal generation unit G can control the alternating-current measurement inputted in each phase of secondary circuit according to predetermined scheme
Phase angle between reference signal, to improve the applicability of detection.
First test output mutual inductor OH1 and the second test output mutual inductor OH2 incudes two in the terminals of electric energy meter
The signal of each phase of minor loop, the first test output mutual inductor OH1 is by incuding the alternating-current measurement benchmark letter on each phase connection
Number current value generate the current test results signal of each phase connection；The second test output mutual inductor OH2 is each by induction
The voltage value of alternating-current measurement reference signal on phase connection generates the voltage tester consequential signal of each phase connection.The test result
Second siding ring of the signal sampling cell S from the first test output mutual inductor OH1 and the second test output mutual inductor OH2
It receives and is believed by the test result that the first test output mutual inductor OH1 and the second test output mutual inductor OH2 generate each phase connection
Number.Test result signal is provided to test result detecting signal unit R by the test result signal sampling cell S.Test knot
Fruit detecting signal unit R is by the test result signal of each phase connection, by the current test results signal, voltage tester result
Signal and the phase angle of the two are compared with nominal value, and whether judgement wherein has abnormal test result signal, and determines
Wiring phase corresponding with the exception of test result signal and wiring error type.The display unit D is for showing the survey
The wiring phase and wiring error type that test result detecting signal unit determines.
The detector provided through the invention can realize the inspection to metering device second loop return wiring using following methods
It surveys.Firstly, the wiring connecting test input mutual inductor of each phase of secondary circuit, the first test output mutual inductor and second are surveyed
Try output mutual inductor；Wherein, the first siding ring of test input mutual inductor is centered around on the magnetic core of test input mutual inductor, will
Secondary side of each phase connection as test input mutual inductor in secondary circuit；The first test output mutual inductor and second
The second siding ring of test output mutual inductor is centered around the first test output mutual inductor respectively and the second test output is mutual
On the magnetic core of sensor, using each phase connection in secondary circuit as the first test output mutual inductor and the second test output mutual inductance
The primary side of device.In turn, the primary side input test reference signal for generating and inputting to the test mutual inductor, to the test
The test benchmark signal for inputting the primary side input of mutual inductor is alternating-current measurement reference signal, and records the alternating-current measurement base
The reference voltage value and reference current value of calibration signal；And it is possible to defeated in each phase of secondary circuit according to predetermined scheme control
The phase angle between alternating-current measurement reference signal entered.Then, from the first test output mutual inductor and the second test output
The second siding ring of mutual inductor, which is received, generates each phase connection by the first test output mutual inductor and the second test output mutual inductor
Test result signal, specifically, by it is described first test output mutual inductor incude the alternating-current measurement base on each phase connection
The current value of calibration signal generates the current test results signal of each phase connection；Pass through the second test output mutual inductor induction
The voltage value of alternating-current measurement reference signal on each phase connection generates the voltage tester consequential signal of each phase connection.Next, will
The test result signal of each phase connection is compared with nominal value, according to the current test results signal, voltage tester result
Signal and the phase angle of the two determine wiring phase corresponding with the exception of test result signal and wiring error type.Display institute
Determining wiring phase and wiring error type.
The present invention can quickly and efficiently detect the wiring error of ic for energy metering secondary circuit, and identify in the presence of wrong
Phase accidentally and type of error, so that the inspection maintenance for secondary circuit provides convenience；The present invention exchange controllable using intersection
Test benchmark signal, middle compared with the existing technology to be detected using actual power, controllability is high, and it is wrong to be applicable to all kinds of wiring
The accidentally investigation of situation；The present invention takes out stitches without energization on-load or power failure and checks by root, easy to operate, time saving and energy saving.
Above embodiments are merely to illustrate the present invention, and not limitation of the present invention, the common skill in relation to technical field
Art personnel can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all etc.
Same technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (2)
1. a kind of metering device secondary circuit detector, which is characterized in that including secondary circuit route collet, test benchmark signal
Generation unit, test result signal sampling unit, test result detecting signal unit, display unit；Wherein, the secondary circuit
Route collet shares several, is respectively used to each between each mutual inductor secondary side and electric energy meter input terminal in connection secondary circuit
Phase connection；Each secondary circuit route collet is used to connect the wiring of one phase of secondary circuit, each secondary circuit route collet packet
Include test input mutual inductor, the first test output mutual inductor and the second test output mutual inductor；Wherein test input mutual inductor
First siding ring be centered around the test input mutual inductor magnetic core on and connect the test benchmark signal generation unit, survey
Examination input mutual inductor is using each phase connection in secondary circuit as its secondary side；The first test output mutual inductor and second
The second siding ring of test output mutual inductor is centered around the first test output mutual inductor respectively and the second test output is mutual
On the magnetic core of sensor and it is connected to the test result signal sampling unit, the first test output mutual inductor and second
Output mutual inductor is tested using each phase connection in secondary circuit as its primary side；The test benchmark signal generation unit is used for
Alternating-current measurement reference signal is generated, and records the reference voltage value and reference current value of the alternating-current measurement reference signal, it will
The reference voltage value and reference current value are supplied to test result detecting signal unit, and input mutual inductor to the test
Primary side inputs the alternating-current measurement reference signal, surveys according to the exchange that predetermined scheme control inputs in each phase of secondary circuit
The phase angle between reference signal is tried, the electric current and voltage signal acquired from power supply line is simulated；The first test output mutual inductance
Device generates the current test results signal of each phase connection by incuding the current value of the alternating-current measurement reference signal on each phase connection；
The second test output mutual inductor is respectively connected by incuding the voltage value generation of the alternating-current measurement reference signal on each phase connection
The voltage tester consequential signal of line；
The test result signal sampling unit tests output mutual inductor from the first test output mutual inductor and second
Second siding ring is received to be surveyed by the electric current that the first test output mutual inductor and the second test output mutual inductor generate each phase connection
Test result signal and voltage tester consequential signal；Test result detecting signal unit is by the current test results signal of each phase connection
It is compared with the phase angle of voltage tester consequential signal and the two with nominal value, whether judgement wherein has abnormal test knot
Fruit signal, and determine wiring phase corresponding with the exception of test result signal and wiring error type；The display unit is used
In the wiring phase and wiring error type that show that the test result detecting signal unit determines.
2. a kind of detection method of metering device second loop return wiring characterized by comprising by connecing for each phase of secondary circuit
Line connecting test inputs mutual inductor, the first test output mutual inductor and the second test output mutual inductor；Wherein, test input is mutual
The first siding ring of sensor is centered around on the magnetic core of test input mutual inductor, using each phase connection in secondary circuit as test
Input the secondary side of mutual inductor；The second siding ring point of the first test output mutual inductor and the second test output mutual inductor
It is not centered around on the magnetic core of the first test output mutual inductor and the second test output mutual inductor, it will be each in secondary circuit
Phase connection is as the first test output mutual inductor and the primary side of the second test output mutual inductor；
Alternating-current measurement reference signal is generated, and records the reference voltage value and reference current of the alternating-current measurement reference signal
Value, and the alternating-current measurement reference signal is inputted to the primary side of the test input mutual inductor, exist according to predetermined scheme control
The phase angle between alternating-current measurement reference signal inputted in each phase of secondary circuit simulates the electric current and electricity acquired from power supply line
Press signal；
The alternating-current measurement benchmark by incuding on each phase connection is received from the second siding ring of the first test output mutual inductor
The current test results signal for each phase connection that the current value of signal generates, and the secondary side from the second test output mutual inductor
Coil receives the voltage tester of each phase connection generated by the voltage value for incuding the alternating-current measurement reference signal on each phase connection
Consequential signal；
The current test results signal of each phase connection and voltage tester consequential signal and the phase angle of the two and nominal value are carried out
It compares, whether judgement wherein has abnormal test result signal, and determines connect corresponding with the exception of test result signal
Line phase and wiring error type；
Wiring phase determined by showing and wiring error type.
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| CN106990384B (en) * | 2017-04-27 | 2023-06-27 | 广西网冠电气有限公司 | Device and method for detecting faulty wiring of three-phase electric energy meter |
| CN107102289B (en) * | 2017-06-19 | 2019-10-22 | 云南电网有限责任公司曲靖供电局 | A kind of measurement loop wiring error judgment method and device |
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| CN111650538B (en) * | 2020-05-29 | 2022-07-26 | 深圳供电局有限公司 | Electric energy meter wiring detection device and method |
| CN111650535B (en) * | 2020-05-29 | 2022-07-15 | 深圳供电局有限公司 | Electric energy meter wiring detection method |
| CN113820632A (en) * | 2020-06-18 | 2021-12-21 | 杭州普安科技有限公司 | Passive power secondary circuit wiring checking system and method |
| CN114256746A (en) * | 2021-12-20 | 2022-03-29 | 江苏弘历电气有限公司 | High-safety switch cabinet with misoperation alarming function |
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