CN112071172A - Intelligent practical training system for live-line replacement of electric energy meter - Google Patents
Intelligent practical training system for live-line replacement of electric energy meter Download PDFInfo
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- CN112071172A CN112071172A CN202010865957.8A CN202010865957A CN112071172A CN 112071172 A CN112071172 A CN 112071172A CN 202010865957 A CN202010865957 A CN 202010865957A CN 112071172 A CN112071172 A CN 112071172A
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- 238000012549 training Methods 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 72
- 238000006243 chemical reaction Methods 0.000 claims description 51
- 238000004891 communication Methods 0.000 claims description 22
- 238000004088 simulation Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
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- 238000011156 evaluation Methods 0.000 description 2
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- 230000005611 electricity Effects 0.000 description 1
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- 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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- G—PHYSICS
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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Abstract
The invention belongs to the technical field of electric power metering management, and particularly relates to an intelligent practical training system for live-line replacement of an electric energy meter, which comprises a three-phase intelligent electric energy meter, a type-1 collector, a virtual load three-phase power supply, a switching box, a transformer primary side switching wiring module, an analog PT module, an analog CT module, a transformer secondary side switching wiring module, a voltage loop violation detection module, a current loop violation detection module, a metering device combined wiring box, a voltage loss and cutoff detection module, a concentrator, a clock timing module, an extended serial port module and a computer control system. The system of the invention adopts a virtual load power supply to supply power during operation, has more stable load output, more flexible control, energy saving and environmental protection, greatly reduces the safety risk of the device, has the functions of timing, dangerous illegal operation detection and no-voltage and no-current detection, has accurate discontinuous metering, high training efficiency and reliable meter changing quality, and effectively lightens the workload of a trainer during practical training guidance and examination.
Description
Technical Field
The invention relates to the technical field of electric power metering management, in particular to an intelligent practical training system for live-line replacement of an electric energy meter.
Background
In the electric power metering management work, the electric energy meter needs to be exchanged when the electric energy meter enters a rotation period, the configuration does not meet the requirement, or the metering accuracy or the function fault occurs. In order to reduce the influence on the electricity consumption of users to the maximum extent, except that the low-voltage direct access type electric energy meter needs to be powered off and exchanged, the high-voltage metering electric energy meter and the low-voltage access type electric energy meter through a mutual inductor are replaced by adopting a method of electrification exchange under the common condition. Because the work of the live exchange of the electric energy meter has higher danger, and simultaneously, the problem of the follow-up electric quantity is also caused by the fact that the mutual inductor is withdrawn from operation in a short time when the electric energy meter is changed in a live way, the training has higher technical requirements on personnel engaged in relevant work, and the training for strengthening the actual operation technical performance of the live exchange of the electric energy meter is very necessary in the training work. In order to improve the training quality and the training efficiency and reduce the workload of a trainer during training guidance and examination, the intelligent training device for live-line replacement of the electric energy meter is imperatively designed and researched.
In addition, the new-version post personnel skill level evaluation standard definitely puts 'low voltage switching on an electric energy meter through a mutual inductor' and 'high voltage switching three-phase three-wire metering device electric energy meter' into a necessary skill evaluation subject, and it is necessary to develop a set of training system devices with strong pertinence and operability right when the devices are used.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an intelligent practical training system for live-line replacement of an electric energy meter, and solves the problems that the existing practical training system device is poor in training quality and low in training efficiency, and the workload of a trainer during practical training guidance and examination cannot be reduced.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the intelligent practical training system for live exchange of the electric energy meter comprises a three-phase intelligent electric energy meter, a type 1 collector, a virtual load three-phase power supply, a switching box, a transformer primary side switching wiring module, an analog PT module, an analog CT module, a transformer secondary side switching wiring module, a voltage loop violation detection module, a current loop violation detection module, a metering device combined junction box, a voltage loss and cut-off detection module, a concentrator, a clock timing module, an extended serial port module and a computer control system, wherein the three-phase intelligent electric energy meter and the type 1 collector are respectively communicated with the concentrator through RS-485 communication cables, the transformer primary side switching wiring module is electrically connected with the virtual load three-phase power supply, the transformer primary side switching wiring module is respectively electrically connected with the analog PT module and the analog CT module, and the analog PT module and the analog CT module are respectively used for voltage potential, The transformer secondary side conversion wiring module is respectively electrically connected with the voltage loop violation detection module and the current loop violation detection module, the voltage loop violation detection module and the current loop violation detection module are used for respectively detecting voltage secondary loop short circuit, phase line grounding, shell contact or human body contact and current secondary loop open-circuit dangerous violation operation and alarming and protecting, the voltage loop violation detection module and the current loop violation detection module are respectively electrically connected with the metering device combined wiring box, the metering device combined wiring box is electrically connected with the voltage loss and cut-off detection module, the voltage loss and cut-off detection module is respectively electrically connected with the three-phase intelligent electric energy meter and the 1-type collector, the three-phase intelligent electric energy meter, the CT module and the current loop violation detection module are respectively electrically connected with the secondary side conversion wiring module, the transformer secondary side conversion wiring module is respectively electrically connected with the voltage loop violation detection module and the current loop violation detection module, The switching box, the voltage loss and cutoff detection module, the concentrator and the clock timing module are respectively communicated with the computer control system through the extended serial port module.
The transformer primary side conversion wiring module, the simulation PT module and the transformer secondary side conversion wiring module form a PT primary and secondary side conversion wiring control circuit, the transformer primary side conversion wiring module, the simulation CT module and the transformer secondary side conversion wiring module form a CT primary and secondary side conversion wiring control circuit, the switching box comprises an MCU, an RS-232 communication module, a relay switching circuit and an output wiring terminal, the MCU is communicated with the computer control system through the RS-232 communication module and the extended serial port module in sequence, the voltage loop violation detection module and the current loop violation detection module are respectively electrically connected with the MCU, the MCU is respectively electrically connected with the relay switching circuit through the PT primary and secondary side conversion wiring control circuit and the CT primary and secondary side conversion wiring control circuit, and the relay switching circuit is electrically connected with the output wiring terminal, the PT primary and secondary side conversion wiring control circuit, the CT primary and secondary side conversion wiring control circuit, the MCU, the RS-232 communication module, the relay switching circuit, the output wiring terminal, the voltage loop violation detection module and the current loop violation detection module form a switching box control circuit.
As a preferred technical scheme of the invention, the virtual load three-phase power supply adopts a WT-Y300G power supply.
As a preferable technical scheme of the invention, the three-phase intelligent electric energy meter, the switching box and the clock timing module are electrically connected with the extended serial port module through RS-232 communication cables, and the voltage loss and cut-off detection module and the concentrator are electrically connected with the extended serial port module through RS-485 communication cables.
As a preferred technical solution of the present invention, the voltage loss and current cutoff detection module adopts a three-phase four-wire voltage: 3 × 220/380V, current: 5A' loss of voltage, cutoff timer.
As a preferred technical scheme of the invention, the clock timing module adopts a WT-JSQ-8 eight-channel timer.
(III) advantageous effects
Compared with the prior art, the invention provides an intelligent practical training system for live-line replacement of electric energy meters, which has the following beneficial effects:
1. this real standard system of electrified electric energy meter of changing intelligence adopts the virtual load power supply during operation, and the load output of virtual load power supply is more stable, and control is more nimble to energy-concerving and environment-protective, still greatly reduced the safety risk of device self.
2. The intelligent practical training system for the live-line exchange of the electric energy meter meets the timing function, the timer is arranged at the eye-catching position of each station, time is displayed in a countdown mode during examination, the progress of the examination time can be prompted in a voice mode, the voltage and current output of the station can be stopped immediately after the examination time arrives, and the intermittent metering is accurate.
3. The intelligent practical training system for live-line replacement of the electric energy meter has a dangerous illegal operation detection function, under the dangerous illegal operation conditions of short circuit of a voltage loop (PT secondary loop), grounding of a phase line, contact with a shell or touching of a human body, open circuit of a current CT secondary loop and the like in the operation process, the device can automatically detect and carry out acousto-optic alarm and protection treatment, the adopted alarm protection measures cannot influence the normal work of other stations, the training efficiency is high, the meter replacement quality is reliable, and the treatment result of the function can be used as the basis of an examination grade negative item.
4. According to the intelligent practical training system for live-line replacement of the electric energy meter, when a voltage loss occurs to a voltage loop (PT), the phase of a fault can be timely and accurately judged, the accumulated time of the fault is recorded, when a secondary side (CT) of the current transformer is opened, the phase of the fault can be timely and accurately judged, the accumulated time of the fault is recorded, and the workload of a trainer during practical training guidance and examination is effectively reduced.
Drawings
FIG. 1 is a schematic block diagram of the system of the present invention;
FIG. 2 is a system communication topology of the present invention;
FIG. 3 is a schematic block diagram of a switching box control circuit according to the present invention;
fig. 4 is a wiring diagram of the voltage loss and current break detection module of the present invention.
In the figure: 1. a three-phase intelligent electric energy meter; 2. a type 1 collector; 3. a virtual load three-phase power supply; 4. a primary side conversion wiring module of the mutual inductor; 5. a simulation PT module; 6. a simulated CT module; 7. a secondary side conversion wiring module of the mutual inductor; 8. a voltage loop violation detection module; 9. a current loop violation detection module; 10. a metering device joint junction box; 11. and a voltage loss and current cutoff detection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-4, the present invention provides the following technical solutions: an intelligent practical training system for live exchange of electric energy meters comprises a three-phase intelligent electric energy meter 1, a 1-type collector 2, a virtual load three-phase power supply 3, a switching box, a transformer primary side conversion wiring module 4, an analog PT module 5, an analog CT module 6, a transformer secondary side conversion wiring module 7, a voltage loop violation detection module 8, a current loop violation detection module 9, a metering device combined wiring box 10, a voltage loss and current break detection module 11, a concentrator, a clock timing module, an extended serial port module and a computer control system, wherein the three-phase intelligent electric energy meter 1 and the 1-type collector 2 are respectively communicated with the concentrator through RS-485 communication cables, the transformer primary side conversion wiring module 4 is electrically connected with the virtual load three-phase power supply 3, the transformer primary side conversion wiring module 4 is respectively electrically connected with the analog PT module 5 and the analog CT module 6, the analog PT module 5 and the analog CT module 6 are respectively used for outputting voltage and current, the analog PT module 5 and the analog CT module 6 are respectively electrically connected with a transformer secondary side conversion wiring module 7, the transformer secondary side conversion wiring module 7 is respectively electrically connected with a voltage loop violation detection module 8 and a current loop violation detection module 9, the voltage loop violation detection module 8 and the current loop violation detection module 9 are respectively used for detecting voltage secondary loop short circuit, phase line grounding, shell contact or human body contact and current secondary loop open-circuit dangerous violation operation and alarming and protecting, the voltage loop violation detection module 8 and the current loop violation detection module 9 are respectively electrically connected with a metering device combined wiring box 10, the metering device combined wiring box 10 is electrically connected with a voltage loss and cut-off detection module 11, the voltage loss and cut-off detection module 11 is respectively electrically connected with a three-phase intelligent electric energy meter 1 and a type collector 2, the three-phase intelligent electric energy meter 1, the switching box, the voltage loss and cutoff detection module 11, the concentrator and the clock timing module are respectively communicated with the computer control system through the extended serial port module.
The transformer primary side conversion wiring module 4, the simulation PT module 5 and the transformer secondary side conversion wiring module 7 form a PT primary side and secondary side conversion wiring control circuit, the transformer primary side conversion wiring module 4, the simulation CT module 6 and the transformer secondary side conversion wiring module 7 form a CT primary side and secondary side conversion wiring control circuit, the switching box comprises an MCU, an RS-232 communication module, a relay switching circuit and an output wiring terminal, the MCU sequentially communicates with the computer control system through the RS-232 communication module and the extended serial port module, the voltage loop violation detection module 8 and the current loop violation detection module 9 are respectively electrically connected with the MCU, the MCU is respectively electrically connected with the relay switching circuit through the PT primary side and secondary side conversion wiring control circuit and the CT primary side conversion wiring control circuit, and the relay switching circuit is electrically connected with the output wiring terminal, the PT primary and secondary side conversion wiring control circuit, the CT primary and secondary side conversion wiring control circuit, the MCU, the RS-232 communication module, the relay switching circuit, the output wiring terminal, the voltage loop violation detection module 8 and the current loop violation detection module 9 form a switching box control circuit.
In this embodiment, the PT primary-secondary side switching wiring control circuit and the CT primary-secondary side switching wiring control circuit constitute a wiring switching module for performing switching of the wiring modes of PT primary-secondary side P33 and P34 and switching of voltage steps, switching of the output of CT four wires and six wires, the switching box mashups the functions of the wiring switching module (the PT primary-secondary side switching wiring control circuit and the CT primary-secondary side switching wiring control circuit) and the hazard violation operation detection module (the voltage circuit violation detection module 8 and the current circuit violation detection module 9), the MCU communicates with the computer control software through the RS-232 communication module (RS-232 communication interface), receives the control command to perform the wiring mode switching and setting, the hazard violation operation detection module performs the protection operation except locally when detecting the hazard violation operation, and simultaneously, the signals are uploaded to a computer control system for corresponding treatment.
Specifically, the virtual load three-phase power supply 3 adopts a WT-Y300G power supply.
Specifically, the three-phase intelligent electric energy meter 1, the switching box and the clock timing module are electrically connected with the extended serial port module through RS-232 communication cables, and the voltage loss and cut-off detection module 11 and the concentrator are electrically connected with the extended serial port module through RS-485 communication cables.
Specifically, the voltage loss and cutoff detection module 11 adopts the specification of "three-phase four-wire, voltage: 3 × 220/380V, current: 5A' loss of voltage, cutoff timer.
In this embodiment, because this device can be compatible with P33 and P34 wiring methods, and the voltage class of simulation is also different, dispose a plurality of no-voltage, cutout timers and can solve but too extravagant, so choose the specification to be "three-phase four-wire, voltage: 3 × 220/380V, current: 5A' voltage loss and current interruption timer, wherein three phases of a voltage loop are connected in parallel, single-phase commercial power is adopted for power supply, a current loop still adopts a virtual load, and the current loop is connected in series between a combined junction box and a meter; the specific application wiring mode is shown in FIG. 4;
it should be noted that: the operation principle of the electrified exchange electric energy meter at the joint junction box before and after the meter replacement is as follows: before the meter is changed, when the power is off, each phase current is short-circuited, and each phase voltage is disconnected after the monitoring current approaches zero; when the meter is switched on, the phase voltage is restored firstly and then the short connecting piece of the phase current is disconnected; the time of stopping metering should be the time of short-circuit current (starting time of cutting off), and the time of resuming metering should be the time of opening short-circuit piece of each phase current (ending time of cutting off); in the operation sequence from left to right from the operation, specifically, the current-cut start and end timings of the C-phase current; therefore, the requirement can be met only by reading two parameters of the current break starting time of the latest C-phase current and the current break finishing time of the latest C-phase current, and voltage loss recording is not necessary.
Specifically, the clock timing module adopts a WT-JSQ-8 eight-channel timer.
The working principle and the using process of the invention are as follows: the actual working condition types of the metering device of the system device meeting the virtual simulation are as follows: the high-voltage three-phase three-wire is connected with the wire by PT (3 multiplied by 100V, V/V type) and CT; the low-voltage three-phase four-wire system is connected with a CT (current transformer) without PT (3 multiplied by 220V/380V); the device adopts a virtual load three-phase power supply 3 for power supply during operation, utilizes the characteristics of stable load output, flexible control, energy conservation and environmental protection of the virtual load power supply, thereby greatly reducing the safety risk of the system device, and comprises a transformer primary side conversion wiring module 4, an analog PT module 5, an analog CT module 6 and a transformer secondary side conversion wiring module 7 to form a wiring conversion module for carrying out the conversion of PT primary and secondary side P33 and P34 wiring modes and the switching of voltage gears and the switching of CT four-wire and six-wire output; each station is provided with a clock timing module at the eye-catching position, the time is displayed in a countdown mode during examination, the progress of the examination time can be prompted in a voice mode, and the voltage and current output of the station is stopped when the examination time is up; in the operation process, dangerous illegal operation conditions such as short circuit of a voltage loop (PT secondary loop), grounding of a phase line, contact with a shell or contact with a human body, open circuit of a current CT secondary loop and the like occur, the device can automatically detect and carry out acousto-optic alarm and protection processing, the adopted alarm protection measures cannot influence the normal work of other stations, and the processing result of the function can be used as the basis of an assessment scoring negative item; the switching box combines the functions of a wiring conversion module and a dangerous illegal operation detection module, the MCU communicates with computer control software through an RS-232 communication interface and receives a control instruction to perform wiring mode conversion and setting, and the dangerous illegal operation detection module performs protection operation locally when detecting dangerous illegal operation and uploads a signal to a computer control system to perform corresponding treatment; through the work of the voltage loss and cut-off detection module 11, when a voltage loss occurs in a voltage loop (PT), the phase of a fault can be timely and accurately judged, the accumulated time of the fault is recorded, and when a secondary side (CT) of the current transformer is opened, the phase of the fault can be timely and accurately judged, and the accumulated time of the fault is recorded.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a real standard system of electrified change ammeter intelligence which characterized in that: the intelligent three-phase electric energy meter comprises a three-phase intelligent electric energy meter (1), a type-1 collector (2), a virtual load three-phase power supply (3), a switching box, a transformer primary side conversion wiring module (4), an analog PT module (5), an analog CT module (6), a transformer secondary side conversion wiring module (7), a voltage loop violation detection module (8), a current loop violation detection module (9), a metering device combined wiring box (10), a voltage loss and cutoff detection module (11), a concentrator, a clock timing module, an extended serial port module and a computer control system, wherein the three-phase intelligent electric energy meter (1) and the type-1 collector (2) are respectively communicated with the concentrator through RS-485 communication cables, the transformer primary side conversion wiring module (4) is electrically connected with the virtual load three-phase power supply (3), and the transformer primary side conversion wiring module (4) is respectively electrically connected with the analog PT module (5) and the analog CT module (6), the transformer safety monitoring system is characterized in that the simulation PT module (5) and the simulation CT module (6) are respectively used for outputting voltage and current, the simulation PT module (5) and the simulation CT module (6) are respectively electrically connected with the transformer secondary side conversion wiring module (7), the transformer secondary side conversion wiring module (7) is respectively electrically connected with the voltage loop violation detection module (8) and the current loop violation detection module (9), the voltage loop violation detection module (8) and the current loop violation detection module (9) are respectively used for detecting voltage secondary loop short circuit, phase line grounding, shell contact or human body contact and current secondary loop open-circuit dangerous violation operation and alarming and protecting, the voltage loop violation detection module (8) and the current loop violation detection module (9) are respectively electrically connected with the metering device combined wiring box (10), and the metering device combined wiring box (10) and the voltage-loss junction box (10), The three-phase intelligent electric energy meter (1), the switching box, the voltage loss and cut-off detection module (11), the concentrator and the clock timing module are respectively communicated with a computer control system through the extended serial port module;
the transformer primary side conversion wiring module (4), the simulation PT module (5) and the transformer secondary side conversion wiring module (7) form a PT primary side and secondary side conversion wiring control circuit, the transformer primary side conversion wiring module (4), the simulation CT module (6) and the transformer secondary side conversion wiring module (7) form a CT primary side and secondary side conversion wiring control circuit, the switching box comprises an MCU, an RS-232 communication module, a relay switching circuit and an output wiring terminal, the MCU communicates with a computer control system through the RS-232 communication module and the extended serial port module in sequence, the voltage loop violation detection module (8) and the current loop violation detection module (9) are respectively and electrically connected with the MCU, and the MCU is respectively and electrically connected with the relay switching circuit through the PT primary side and secondary side conversion wiring control circuit and the CT primary side conversion wiring control circuit, the relay switching circuit is electrically connected with the output wiring terminal, and the PT primary and secondary side switching wiring control circuit, the CT primary and secondary side switching wiring control circuit, the MCU, the RS-232 communication module, the relay switching circuit, the output wiring terminal, the voltage loop violation detection module (8) and the current loop violation detection module (9) form a switching box control circuit.
2. The intelligent practical training system for the electrified exchange of the electric energy meter according to claim 1, characterized in that: the virtual load three-phase power supply (3) adopts a WT-Y300G power supply.
3. The intelligent practical training system for the electrified exchange of the electric energy meter according to claim 1, characterized in that: the three-phase intelligent electric energy meter (1), the switching box and the clock timing module are electrically connected with the extended serial port module through RS-232 communication cables, and the voltage loss and cut-off detection module (11) and the concentrator are electrically connected with the extended serial port module through RS-485 communication cables.
4. The intelligent practical training system for the electrified exchange of the electric energy meter according to claim 1, characterized in that: the voltage loss and cutoff detection module (11) adopts a three-phase four-wire voltage specification: 3 × 220/380V, current: 5A' loss of voltage, cutoff timer.
5. The intelligent practical training system for the electrified exchange of the electric energy meter according to claim 1, characterized in that: the clock timing module adopts a WT-JSQ-8 eight-channel timer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010865957.8A CN112071172A (en) | 2020-08-25 | 2020-08-25 | Intelligent practical training system for live-line replacement of electric energy meter |
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| CN202010865957.8A CN112071172A (en) | 2020-08-25 | 2020-08-25 | Intelligent practical training system for live-line replacement of electric energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113450620A (en) * | 2021-08-10 | 2021-09-28 | 国网辽宁省电力有限公司沈阳供电公司 | Electric power metering device simulation field workbench and method for simulating field fault |
| CN114089245A (en) * | 2021-11-22 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Meter checking instrument |
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