CN118444213B - Intelligent checking method for wiring of three-phase electric energy meter in passive state - Google Patents
Intelligent checking method for wiring of three-phase electric energy meter in passive stateInfo
- Publication number
- CN118444213B CN118444213B CN202410537368.5A CN202410537368A CN118444213B CN 118444213 B CN118444213 B CN 118444213B CN 202410537368 A CN202410537368 A CN 202410537368A CN 118444213 B CN118444213 B CN 118444213B
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- Prior art keywords
- tail
- electric energy
- meter
- energy meter
- phase electric
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/187—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for measuring instruments
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Algebra (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
本发明公开了一种无源状态下三相电能表接线的智能检查方法，包括：在联合接线盒和三相互感器电能表之间加表尾拆接线检测电路板，将三相电能表A、B、C相电压进线端子、零线进线端子和所有电流连接线端子分别通过同轴接线端子接入表尾拆接线检测电路板，所述表尾拆接线检测电路板包括单片机和继电器，通过控制继电器进行强电和弱点的切换；表尾拆接线检测电路板通过检测同轴接线端子接头上两个接触点的连接状态实现表尾接线是否拆除或安装的检测，实现三相电能表表尾拆接线的顺序是否正确。本发明能够自动实现表尾接线顺序检查。
The present invention discloses an intelligent inspection method for the wiring of a three-phase electric energy meter in a passive state, comprising: adding a meter tail disconnection detection circuit board between a joint junction box and a three-phase mutual inductor electric energy meter; connecting the three-phase electric energy meter's A, B, and C phase voltage input terminals, neutral input terminal, and all current connection terminals to the meter tail disconnection detection circuit board via coaxial terminal blocks; the meter tail disconnection detection circuit board includes a single-chip microcomputer and a relay, and switches between strong and weak current points by controlling the relay; the meter tail disconnection detection circuit board detects whether the meter tail connection has been removed or installed by detecting the connection status of two contact points on the coaxial terminal block connector, thereby ensuring that the order of disconnection of the three-phase electric energy meter's meter tail is correct. The present invention can automatically implement meter tail connection sequence inspection.
Description
Technical Field
The invention relates to the technical field of electrician practical training equipment, in particular to an intelligent checking method for wiring of a three-phase electric energy meter in a passive state.
Background
The electric energy metering device is an important metering device for an electric power enterprise to realize marketing service, and in the daily operation and maintenance work of the electric energy metering device, the electric energy meter is exchanged under the conditions that the electric energy meter enters a rotation period, the electric energy meter fails and the like. Particularly, the replacement work of the electric energy meter is required to be carried out without influencing the normal production and life of users under the condition of high-grade service work, and uninterrupted replacement work is required to be adopted for high-grade meters and high-grade low-grade meters (the electric energy meters are connected through the mutual inductor). The technical skill level of related operators is highly required in terms of the complexity and the danger of work, so that the three-phase electric energy meter mounting skill training and skill assessment are very important. At present, the inspection and discrimination of the wiring sequence of the three-phase electric energy meter are not perfect in China under the passive state.
The existing products have the following problems:
the prior device can not automatically realize sequential inspection of the meter tail wiring, needs to train the invigilator to observe with naked eyes in real time, increases the workload of the training invigilator, has higher misjudgment and missed judgment rate of wiring inspection, and can not fully automatize grading.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent checking method for wiring of a three-phase electric energy meter in a passive state, and the sequence checking of the wiring of the meter tail is automatically realized.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an intelligent inspection method for wiring of a three-phase electric energy meter in a passive state comprises the following steps:
A meter tail disassembly and wiring detection circuit board is added between the combined junction box and the three-phase transformer electric energy meter, a A, B, C-phase voltage incoming terminal, a zero line incoming terminal and all current connecting wire terminals of the three-phase electric energy meter are respectively connected into the meter tail disassembly and wiring detection circuit board through coaxial wiring terminals, the meter tail disassembly and wiring detection circuit board comprises a singlechip and a relay, and strong electricity and weak point switching is carried out through a control relay;
the meter tail disassembly line detection circuit board realizes the detection of whether the meter tail line is disassembled or installed or not by detecting the connection state of two contact points on the coaxial connection terminal connector, and realizes whether the sequence of the meter tail disassembly line of the three-phase electric energy meter is correct or not.
Further, the coaxial wiring terminal adopts a structure of double cores coaxial wires and double contact points of a plug.
The coaxial wiring terminal comprises a conductive rod, an end conductive pipe, an insulating sleeve, a tail conductive pipe, a locking nut, an insulating sheath and a double-core wire, wherein one end of the conductive rod is used as a plug end, the other end of the conductive rod sequentially penetrates through the end conductive pipe and the insulating sleeve, the conductive rod is in contact conduction with the end conductive pipe, the tail conductive pipe is arranged outside the insulating sleeve, the tail conductive pipe and the conductive rod are in an insulating state through the insulating sleeve, the tail conductive pipe and the conductive rod are locked by the insulating locking nut, an outer core of the wire at one end of the double-core wire is welded with the tail conductive pipe, an inner core of the wire is welded with the conductive rod, the inner core and the outer core of the double-core wire are connected with a meter tail disconnection detection circuit board, when two screws on the tail wiring holes of the three-phase electric energy meter are inserted into the joints of the coaxial wiring terminal, two contact points on the coaxial wiring terminal are in short connection, when the two contact points on the tail wiring holes of the three-phase electric energy meter are unscrewed, the coaxial wiring terminal joint is taken out from the tail wiring hole of the three-phase electric energy meter, the coaxial wiring terminal is connected with the tail conductive pipe through the coaxial wiring pipe, and the two contact points on the three-phase electric meter tail wiring meter are connected with the three-phase electric meter tail electric meter through the two contact points, and the two contact points are connected with the three-phase meter tail electric meter through the three-phase electric meter bus, and the three-phase electric meter tail electric meter, and three-phase electric meter and three-phase electric meter wire, three-phase electric meter and three electric meter wire.
Further, the outer part of the welding part of the wire inner core and the conductive rod is wrapped with an insulating sheath.
Further, all the current connecting wire terminals comprise a A, B, C-phase current incoming wire terminal of the three-phase electric energy meter and a A, B, C-phase current outgoing wire terminal of the three-phase electric energy meter, and a A, B, C-phase voltage incoming wire terminal and a zero line incoming wire terminal of the three-phase electric energy meter, wherein 10 groups of the total connecting wire terminals are connected to the meter tail disconnection detection circuit board through coaxial connecting wire terminals respectively.
Furthermore, one end of the double-core wire far away from the conductive rod can be connected with a virtual load power supply.
Compared with the prior art, the invention provides an intelligent checking method for wiring of the three-phase electric energy meter in a passive state, which has the following beneficial effects:
1. the automatic monitoring of the sequence of the meter tail stitch removal and the automatic detection of the sequence of the meter tail stitch removal are realized;
2. according to the intelligent guide mode, the intelligent guide mode is combined, so that students can be guided to learn autonomously according to the correct operation flow to complete training of the working flow, and the workload of teachers is reduced;
3. the automatic checking method for the three-phase meter tail wiring can realize the automatic grading function of wiring training, can grade automatically according to grading requirements and student operation records, reduces the workload of teachers and improves the objectivity and accuracy of checking.
Drawings
FIG. 1 is a schematic diagram of a tail wire detection.
Fig. 2 is a system communication topology.
Fig. 3 is a schematic view of a coaxial terminal fitting.
FIG. 4 is a schematic diagram of a tail wire.
Fig. 5 is a schematic diagram of a tail wire detection switch.
FIG. 6 is a schematic diagram of a sub-structure of a table tail.
In the figure, the conductive rod is 1-, the conductive tube is 2-end, the insulating sleeve is 3-, the conductive tube is 4-tail, the locking nut is 5-, the insulating sheath is 6-, the conductive wire is 7-double-core, the outer core of the conductive wire is 7-1, and the inner core of the conductive wire is 7-2.
Detailed Description
For a better understanding of the present invention, reference will be made to fig. 1,2, 3, 4, 5 and 6, and in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention.
As shown in fig. 2, the hardware of the operation and maintenance comprehensive intelligent training device of the current electric energy metering device mainly comprises a communication control module, a virtual load three-phase power supply, a violation operation detection board, an error wiring setting board, a joint junction box, a three-phase transformer electric energy meter, a joint junction box connecting piece state detection board and a meter tail disassembly wiring detection circuit board, and the structure of the three-phase transformer electric energy meter of the embodiment is not a point of protection of the invention, and can also adopt the practical training device of other existing electric energy metering devices, so detailed description is not made here.
An intelligent inspection method for wiring of a three-phase electric energy meter in a passive state comprises the steps of adding a meter tail disconnection detection circuit board between a joint junction box of an operation and maintenance training device of the electric energy metering device and the three-phase transformer electric energy meter, wherein the meter tail disconnection detection circuit board realizes the sequential detection of meter tail wiring and disconnection by combining coaxial line terminals, meanwhile, UA, UB, UC, UN (respectively three-phase electric energy meter A, B, C phase voltage inlet terminals and zero line inlet terminals) voltage connection wires between the three-phase transformer electric energy meter and the meter tail disconnection detection circuit board are connected with IA+, IB+, IC+ and IC- (IA+, IB+, IC+ are respectively three-phase electric energy meter A, B, C phase current inlet terminals, such as 1, 4 and 7 terminals of a meter tail shown in fig. 6, IA-, IB-, IC-are respectively three-phase electric energy meter A, B, C phase current outlet terminals, such as 3, 6 and 9 terminals of the meter tail shown in fig. 6, and coaxial line connection terminals (10 groups in total) of double-core type earphone plugs are connected by adopting coaxial line connection terminals with double contact points of double-core coaxial line plug as shown in fig. 3 (hereinafter referred to as coaxial line connection terminals).
The coaxial wiring terminal comprises a conductive rod 1, an end conductive tube 2, an insulating sleeve 3, a tail conductive tube 4, a lock nut 5, an insulating sheath 6, a double-core wire 7, a wire outer core 7-1, a wire inner core 7-2, wherein the conductive rod 1 passes through the end conductive tube 2 and is in contact conduction with the end conductive tube 2, then the conductive rod 1 passes through the insulating sleeve 3, the tail conductive tube 4 is arranged outside the insulating sleeve 3, the tail conductive tube 4 and the conductive rod 1 are in an insulating state through the insulating sleeve 3, then the insulating lock nut 5 is used for locking, finally the wire outer core 7-1 of the double-core wire 7 is welded with the tail conductive tube 4, the wire inner core 7-2 of the double-core wire 7 is welded with the conductive rod 1, and finally the insulating sheath 6 is wrapped outside, and two wires of the double-core wire 7 shown in fig. 5 are connected with a single chip microcomputer interface and a virtual load three-phase power supply through a relay.
According to the working principle, as shown in fig. 4, when the coaxial terminal connector is inserted into the three-phase electric energy meter tail wiring hole and two screws 8 on the three-phase electric energy meter tail wiring hole are screwed, two contact points on the coaxial terminal connector are short-circuited, when the two screws on the three-phase electric energy meter tail wiring hole are unscrewed and the coaxial terminal connector is taken out from the three-phase electric energy meter tail wiring hole, the two contact points on the coaxial terminal connector are disconnected, so that the meter tail disconnection detection circuit board can detect whether the meter tail wiring is detached or installed by detecting the connection state of the two contact points on the coaxial terminal connector, and can realize whether the sequence of the three-phase electric energy meter tail disconnection is correct by detecting the contact state change state combination sequencing algorithm of the 10 groups of coaxial terminal.
In the disconnection process, when A, B, C, N voltage connection sheets in the joint junction box are disconnected, two current connection sheets of A, B, C phases are sequentially and respectively connected in short, and a meter tail disconnection detection circuit board is told, the meter tail disconnection detection circuit board controls a K1-K10 relay (shown in figure 1) to act so as to switch 10 groups of wires (A, B, C, N voltage wire 4 groups of dual-core coaxial wires and A, B, C phases of current wire 6 groups of dual-core coaxial wires) of the meter tail from a voltage current output end (strong current end) of the joint junction box to 10 groups of wires (weak current end) of the meter tail connection detection end (weak current end) to be respectively connected to 20 IO ports (defined as MCU_IO1, MCU_IO2, MCU_IO3 and MC..MCU_IO20) of an auxiliary singlechip; each of 10 groups of IO ports of the auxiliary singlechip is configured to be 1 output high level, the other IO port is configured as a pull-down input detection port, namely MCU_IO1, MCU_IO3, MCU_IO5, MCU_IO7, MCU_IO9, MCU_IO11, MCU_IO13, MCU_IO15, MCU_IO17, MCU_IO19 and output high level, and MCU_IO2, MCU_IO4, MCU_IO6, MCU_IO8, MCU_IO10, MCU_IO12, MCU_IO14, MCU_IO16, MCU_IO18 and MCU_IO20 are configured as pull-down input detection. When the 1 st group of line A phase voltage lines are not detached from the meter tail, the MCU_IO1 and the MCU_IO2 are in short circuit, as shown in fig. 4, the MCU_IO2 port of the singlechip is in high level, and when the A phase voltage lines are detached from the connecting terminal hole 1 of the meter tail, the MCU_IO1 and the MCU_IO2 port are in open circuit, as shown in fig. 6, the MCU_IO2 port of the auxiliary singlechip is in low level. The disconnection sequence of the tail wire can be accurately judged by sequentially judging the low-level change sequence of the MCU_IO2, MCU_IO4, MCU_IO6, MCU_IO8, MCU_IO10, MCU_IO12, MCU_IO14, MCU_IO16, MCU_IO18 and MCU_IO20 ports, otherwise, the connection sequence of the tail wire can be accurately judged by judging the high-level change sequence of the MCU_IO2, MCU_IO4, MCU_IO6, MCU_IO8, MCU_IO10, MCU_IO12, MCU_IO14, MCU_IO16, MCU_IO18 and MCU_IO20 ports.
By the method, misjudgment and missed judgment during the disassembly and assembly of the electric energy meter in the disassembly and assembly training assessment of the electric energy metering device can be avoided, the full automation of the assessment can be realized, and the fairness and fairness of the assessment can be improved. Meanwhile, the training aid can assist in guiding students to conduct autonomous training, and meanwhile workload of the trainers in practical training guidance and assessment is greatly reduced.
Claims (4)
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| CN202410537368.5A CN118444213B (en) | 2024-04-30 | 2024-04-30 | Intelligent checking method for wiring of three-phase electric energy meter in passive state |
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| CN202410537368.5A CN118444213B (en) | 2024-04-30 | 2024-04-30 | Intelligent checking method for wiring of three-phase electric energy meter in passive state |
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| CN118444213B true CN118444213B (en) | 2025-09-16 |
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- 2024-04-30 CN CN202410537368.5A patent/CN118444213B/en active Active
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