CN113450620A - Electric power metering device simulation field workbench and method for simulating field fault - Google Patents
Electric power metering device simulation field workbench and method for simulating field fault Download PDFInfo
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- CN113450620A CN113450620A CN202110911505.3A CN202110911505A CN113450620A CN 113450620 A CN113450620 A CN 113450620A CN 202110911505 A CN202110911505 A CN 202110911505A CN 113450620 A CN113450620 A CN 113450620A
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Abstract
本发明涉及电力计量管理技术领域，具体涉及一种电力计量装置模拟现场工作台及模拟现场故障方法。本发明工作台模拟电力计量工作现场装置配置有电能表、仿真PT和CT设备，工作人员可模拟现场操作，能够实现包括单相失压、全失压、断相、单相失流、全失流、电压不平衡、电流不平衡、逆相序、电线反接等多种故障情况，电流、电压旋钮式任意调控，多种错接线情况和配线情况随意变换。设置三相三线一次电压开关，能够实现三相三线电压互感器一次失压故障；设置三相四线电流互感器实现三相四线电流互感器一次测量和二次测量。本发明现场工作环境及故障模拟直观、全面，培训后人员可直接上岗操作，提升培训效率和效果。
The invention relates to the technical field of power metering management, in particular to a method for simulating a field workbench for a power metering device and a method for simulating field failures. The workbench simulated power metering work field device of the present invention is equipped with electric energy meter, simulated PT and CT equipment, and the staff can simulate the field operation, and can realize single-phase voltage loss, total voltage loss, phase failure, single-phase current loss, total loss Current, voltage unbalance, current unbalance, reverse phase sequence, wire reverse connection and other fault conditions, current and voltage knob type arbitrary adjustment, various wrong wiring conditions and wiring conditions can be changed at will. Setting the three-phase three-wire primary voltage switch can realize the primary voltage loss fault of the three-phase three-wire voltage transformer; setting the three-phase four-wire current transformer can realize the primary measurement and the secondary measurement of the three-phase four-wire current transformer. The on-site working environment and fault simulation of the present invention are intuitive and comprehensive, and the personnel can be directly operated after the training, thereby improving the training efficiency and effect.
Description
Technical Field
The invention relates to the technical field of electric power metering management, in particular to an electric power metering device simulation field workbench and a field fault simulation method for testing and training electric energy metering workers, electricity utilization inspectors and meter readers.
Background
The power industry develops rapidly, in order to ensure that the power industry produces and the electric energy metering can be carried out accurately, the electric energy metering needs to be carried out by means of accurate instruments, and once errors occur in the metering process of the electric energy meter, great economic losses can be brought to users or power supply enterprises. In order to grasp this important link, the electric energy meter personnel also need to have higher business quality and working skill, and before formal work, the electric energy meter personnel need to master various fault types in the wiring of the three-phase three-wire electric energy meter and the three-phase four-wire electric energy meter so as to be capable of dealing with various conditions in the following work, so that the training of the workers going on duty in the power grid is essential.
In the conventional metering device wrong wiring training equipment, a three-phase four-wire operation is only carried out between the secondary of a transformer and an electric energy meter, and some simple wrong wirings are arranged, so that primary measurement and secondary measurement of the current transformer cannot be carried out; the three-phase three-wire metering device is not provided with a voltage transformer and is set in a voltage loss fault mode; different from the actual working site metering device for electric power metering, the device has poor intuition, can not realize the actual operation of site wiring, can not achieve the expected training effect, and can not enable workers to really master the working principle and the components of the metering device.
Disclosure of Invention
The invention aims at the problems, and provides an electric power metering device simulation field workbench which can simulate various on-site wrong wiring functions and wiring functions, including single-phase voltage loss, full voltage loss, phase failure, single-phase current loss, full current loss, voltage unbalance, current unbalance, reverse phase sequence, reverse connection of electric wires, primary measurement and secondary measurement of a three-phase four-wire current transformer and primary voltage loss fault setting of a three-phase three-wire voltage transformer, so that the actual operation setting of on-site wiring is realized. The field simulation degree is high, the operation is easy, and the safety is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
the electric power metering device simulation field workbench comprises a shell, wherein a PT and CT simulation device compartment 1, a three-phase four-wire metering device compartment 2, a three-phase three-wire metering device compartment 3, a main control box compartment 4 and a power supply and load device compartment 5 are distributed in the shell in a partitioned manner, five embedded compartments are formed in total, and each compartment is provided with an openable door;
a first simulation three-phase three-wire voltage transformer 22, a second simulation three-phase three-wire voltage transformer 23, a first simulation three-phase three-wire current transformer 24 and a second simulation three-phase three-wire current transformer 25 are arranged in the PT and CT simulation device compartment 1 and used for simulating three-phase three-wire PT (voltage transformer) and CT (current transformer) equipment in an actual working site;
a three-phase four-wire electric energy meter 6 and a wiring terminal row thereof, a three-phase four-wire current transformer 26 and a meter front switch 20 are arranged in the three-phase four-wire metering device compartment 2;
the three-phase three-wire metering device compartment 3 is internally provided with a three-phase three-wire electric energy meter 7, a wiring terminal block thereof and three voltmeters;
a first voltage selection switch 8, a first current selection switch 9, a second voltage selection switch 10 and a second current selection switch 11, as well as a workbench main power switch, a voltmeter and an ammeter, a three-phase three-wire voltage transformer primary voltage switch, a three-phase three-wire and three-phase four-wire high-low voltage change-over switch are arranged in the main control box compartment 4;
a first transformer 12, a second transformer 13, a third transformer 14 and a rectifier 28 are arranged at the upper end in the power supply and load device compartment 5; a load 15 is arranged on one side of the lower end of the transformer, and a three-phase three-wire voltage transformer 17, a three-phase three-wire current transformer 27, a first relay group 16, a second relay group 18, a third relay group 19, a fourth relay group 21 and a rectifier 28 are arranged on the other side of the lower end of the transformer;
in the workstation:
the input end of the rectifier 28 is connected with the secondary side of the first transformer 12, the second transformer 13 or the third transformer, and the output end of the rectifier 28 is connected with the first voltage selection switch 8, the second voltage selection switch 10, the first current selection switch 9 and the second current selection switch 11 respectively. The first voltage selection switch 8 is connected with a first relay group 16, the first relay group 16 is connected with the three-phase three-wire electric energy meter 7 through a three-phase three-wire voltage transformer 17, and the three-phase three-wire voltage transformer 17 is used for reducing the voltage value to meet the incoming line detection voltage amplitude of the three-phase three-wire electric energy meter 7; the first current selection switch 9 is connected with the second relay group 18, the second relay group 18 is connected with the three-phase three-wire electric energy meter 7 through a three-phase three-wire current transformer 27, and the three-phase three-wire current transformer 27 is used for reducing the current value to meet the incoming line detection current amplitude of the three-phase three-wire electric energy meter 7; the second voltage selection switch 10 is connected with a third relay group 19, and the third relay group 19 is connected with the three-phase four-wire electric energy meter 6 through a meter front switch 20; the second current selection switch 11 is connected with a fourth relay group 21, the fourth relay group 21 is connected with the three-phase four-wire electric energy meter 6 through a three-phase four-wire current transformer 26, and the three-phase four-wire current transformer 26 is used for reducing the current value to meet the incoming line detection current amplitude of the three-phase four-wire electric energy meter 6;
the primary sides of the three-phase three-wire voltage transformer 17, the first transformer 12, the second transformer 13 and the third transformer 14 are connected with an alternating current power supply through an alternating current contactor 29, and the primary side of the three-phase three-wire voltage transformer 17 is connected with a three-phase three-wire primary voltage switch in the main control box compartment 4 through a fuse and is used for setting a primary voltage loss fault of the three-phase three-wire voltage transformer; the secondary sides of the first transformer 12, the second transformer 13 and the third transformer 14 are respectively connected with a three-phase three-wire current transformer 27 and a three-phase four-wire current transformer 26 through a load 15;
the first simulation three-phase three-wire voltage transformer 22 and the second simulation three-phase three-wire voltage transformer 23 are communicated with the three-phase three-wire voltage transformer 17 and serve as three-phase three-wire PT operation ends of the workbench; the first simulation three-phase three-wire current transformer 24 and the second simulation three-phase three-wire current transformer 25 are communicated with the three-phase three-wire current transformer 27 and serve as three-phase three-wire CT operation ends of the workbench.
Preferably, the shell is of a stepped layered structure, a three-phase four-wire metering device compartment 2, a three-phase three-wire metering device compartment 3 and a main control box compartment 4 are arranged on the upper layer, and a PT and CT simulation device compartment 1 and a power supply and load device compartment 5 are arranged on the lower layer.
As a preferred scheme, the three-phase four-wire electric energy meter 6, the three-phase three-wire electric energy meter 7, the three-phase three-wire voltage transformer 17, the three-phase four-wire current transformer 26, the three-phase three-wire current transformer 27 and the rectifier 28 are all provided with a wiring terminal row, so that flexible wiring is facilitated.
Preferably, the rectifier 28 is a silicon rectifier.
Preferably, the first voltage selection switch 8, the second voltage selection switch 10, the first current selection switch 9 and the second current selection switch 11 are multi-contact selection switches.
Preferably, the input end of the alternating current contactor is connected with an alternating current power supply through an air switch.
Preferably, the output voltage of the first transformer 12, the second transformer 13 and the third transformer 14 is 24V or 4V to 6V.
Preferably, the output voltage of the three-phase three-wire voltage transformer 17 is 100V.
Preferably, the output voltage of the rectifier is 24V dc.
The method for simulating the field fault by the electric power metering device comprises the following specific steps:
s1, three-phase three-wire system line field simulation
1) The first relay set 16 is controlled to adjust the connection of electric wires through the first voltage selection switch 8, the simulation of field conditions of single-phase voltage loss, two-phase voltage loss, voltage unbalance, reverse phase sequence and different voltage and current in a three-phase three-wire system line is set, and the fault condition is checked from the three-phase three-wire electric energy meter 7;
2) the second relay group 18 is controlled to adjust the connection of electric wires through the first current selection switch 9, the simulation of field conditions such as single-phase current loss, total current loss, current imbalance, reverse phase sequence, reverse current connection and the like in a three-phase three-wire system line is set, and the fault condition is checked from the three-phase three-wire electric energy meter 7;
3) simultaneously controlling a first voltage selection switch 8 and a first current selection switch 9, and setting comprehensive field fault conditions in the three-phase three-wire system line;
s2. three-phase four-wire system line field simulation
1) The third relay group 19 is controlled to adjust the connection of electric wires through the second voltage selection switch 10, the simulation of field conditions such as single-phase voltage loss, two-phase voltage loss, voltage unbalance, voltage current out-of-phase and the like in a three-phase four-wire system line is set, and the fault condition is checked from the three-phase four-wire electric energy meter 6;
2) the fourth relay group 21 is controlled to adjust the connection of electric wires through the second current selection switch 11, the simulation of field conditions such as single-phase current loss, two-phase current loss, total current loss, current imbalance, voltage and current different phases, current reverse connection and the like in a three-phase four-wire system circuit is set, and the fault condition is checked from the three-phase four-wire electric energy meter 6;
3) simultaneously controlling a second voltage selection switch 10 and a second current selection switch 11, and setting the comprehensive field fault condition in the three-phase four-wire system line;
s3, on-site fault simulation switching of three-phase three-wire and three-item four-wire metering device
And controlling three-phase three-wire and three-phase four-wire high-low voltage change-over switches in the power supply and load device compartment 5, and switching the field fault simulation of the three-phase three-wire and three-wire four-wire metering device.
Compared with the prior art, the invention has the beneficial effects that:
1. the workbench directly simulates the configuration of a device on a power metering working site, an electric energy meter on the simulated power metering working site and PT and CT equipment, and workers can simulate field operation; the intuition is strong, and the personnel can directly go on duty to operate after training, thereby improving the training efficiency and effect;
2. the three-phase three-wire voltage transformer can realize various possible fault conditions including single-phase voltage loss, full voltage loss, phase failure, single-phase current loss, full current loss, voltage unbalance, current unbalance, reverse phase sequence, reverse connection of wires and the like, current and voltage knob type arbitrary regulation and control, various wrong wiring conditions and wiring conditions are arbitrarily changed, and particularly, a three-phase three-wire primary voltage switch is arranged, so that the one-time voltage loss fault of the three-phase three-wire voltage transformer can be realized; the three-phase four-wire current transformer is arranged to realize primary measurement and secondary measurement of the three-phase four-wire current transformer. The field working environment and fault simulation is visual and comprehensive;
3. the field fault simulation of the three-phase three-wire and three-phase four-wire metering device can be comprehensively realized on the workbench, and the free switching is realized through the three-phase three-wire and three-phase four-wire high-low voltage change-over switch;
4. wiring terminals are arranged on all parts of the workbench, so that wiring operation can be flexibly performed, switching and control are flexible, and training and examination effects are remarkably improved;
5. multiple protections such as a multi-gang switch, an air switch, a plurality of relay groups and the like are realized, the power is automatically cut off, and the operation is safe;
6. the workbench has the advantages of simple structure, small volume, low manufacturing cost, low energy consumption, convenient use, low failure rate and easy removal;
7. the workstation subregion sets up, the actual operation of the training teaching of being convenient for, and is rationally distributed, and the structure is clear, and the result of application is showing.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of an appearance structure of a simulation field workbench of the power metering device of the present invention;
FIG. 2 is a schematic diagram of a simulation field workbench of the power metering device of the present invention;
FIG. 3 is a schematic view of the structure of the openable and closable door of FIG. 2 with the compartment omitted;
FIG. 4 is a schematic diagram of the circuit of the simulation field workbench of the power metering device of the present invention;
fig. 5 is a schematic diagram of a specific connection circuit of a third relay group and a fourth relay group of the simulation field workbench of the electric power metering device (i.e. a three-phase four-wire electric energy meter incoming line connection control circuit);
fig. 6 is a schematic diagram of a specific connection circuit of a first relay set and a second relay set (i.e. a three-phase three-wire electric energy meter incoming line connection control circuit) according to the present invention;
in fig. 5 and 6, the incoming line end of the relay group adopts an omitted drawing method, the relation of incoming lines of all phases is directly shown, and the terminal row in fig. 4 is omitted.
In the figure: 1. PT and CT analog device compartment, 2, three-phase four-wire metering device compartment, 3, three-phase three-wire metering device compartment, 4, main control box compartment, 5, power supply and load device compartment, 6, three-phase four-wire electric energy meter, 7, three-phase three-wire electric energy meter, 8, first voltage selection switch, 9, first current selection switch, 10, second voltage selection switch, 11, second current selection switch, 12, first transformer, 13, second transformer, 14, third transformer, 15, load, 16, first relay group, 17, three-phase three-wire voltage transformer, 18, second relay group, 19, third relay group, 20, meter front switch, 21, fourth relay group, 22, first simulation three-phase three-wire voltage transformer, 23, second simulation three-phase three-wire voltage transformer, 24, first simulation three-phase three-wire current transformer, 25, The second simulation three-phase three-wire current transformer, 26, three-phase four-wire current transformer, 27 is a three-phase three-wire current transformer.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
Example 1
As shown in fig. 1 and 2, the electric power metering device simulation field workbench comprises a shell, wherein the shell is of a stepped layered structure, three embedded compartments including a three-phase four-wire metering device compartment 2, a three-phase three-wire metering device compartment 3 and a main control box compartment 4 are arranged on the upper layer, two embedded compartments including a PT and CT simulation device compartment 1 and a power supply and load device compartment 5 are arranged on the lower layer, and each compartment is provided with an openable and closable door;
as shown in fig. 3, a first emulated three-phase four-wire voltage transformer 22, a second emulated three-phase three-wire voltage transformer 23, a first emulated three-phase four-wire current transformer 24 and a second emulated three-phase four-wire current transformer 25 are arranged in the PT and CT analog device compartment 1, and are used for simulating three-phase three-wire/three-phase four-wire PT (voltage transformer) and CT (current transformer) equipment in an actual working site;
a three-phase four-wire electric energy meter 6 and a wiring terminal row thereof, a three-phase four-wire current transformer 26 and a meter front switch 20 are arranged in the three-phase four-wire metering device compartment 2;
the three-phase three-wire metering device compartment 3 is internally provided with a three-phase three-wire electric energy meter 7, a wiring terminal block thereof and three voltmeters;
a first voltage selection switch 8, a first current selection switch 9, a second voltage selection switch 10 and a second current selection switch 11, as well as a workbench main power switch, a voltmeter and an ammeter, a three-phase three-wire voltage transformer primary voltage switch, a three-phase three-wire and three-phase four-wire high-low voltage change-over switch are arranged in the main control box compartment 4;
a first transformer 12, a second transformer 13, a third transformer 14 and a rectifier 28 are arranged at the upper end in the power supply and load device compartment 5; a load 15 is arranged on one side of the lower end, and a three-phase three-wire voltage transformer 17, a first relay set 16, a second relay set 18, a third relay set 19, a fourth relay set 21 and an alternating current contactor 29 are arranged on the other side of the lower end.
As shown in fig. 4, in the table:
the rectifier 28 is a silicon rectifier, the input end of the rectifier 28 is connected with the secondary side of the first transformer 12 to obtain 24V voltage after voltage reduction, the output end of the rectifier 28 outputs 24V dc power, the dc power connection terminal row at the output end of the rectifier 28 is respectively connected with the first voltage selection switch 8, the second voltage selection switch 10, the first current selection switch 9 and the second current selection switch 11, and the first voltage selection switch 8, the second voltage selection switch 10, the first current selection switch 9 and the second current selection switch 11 are multi-contact switches.
The first voltage selection switch 8 is connected with a first relay group 16, the first relay group 16 is connected with a three-phase three-wire electric energy meter 7 through a three-phase three-wire voltage transformer 17, namely, the output end of the three-phase three-wire voltage transformer 17 sequentially passes through a wiring terminal row of the three-phase three-wire voltage transformer 17, a controlled switch of the first relay group 16 and a wiring terminal row of the three-phase three-wire electric energy meter 7 and is connected with an A-phase voltage line, a ground wire and a C-phase voltage line of the three-phase three-wire electric energy meter 7, and the three-phase three-wire voltage transformer 17 is used for reducing the voltage value to meet the incoming line detection voltage amplitude of the three-phase three-wire electric energy meter 7;
the first current selection switch 9 is connected with the second relay group 18, the second relay group 18 is connected with the three-phase three-wire electric energy meter 7 through the three-phase three-wire current transformer 27, namely, the output end of the three-phase three-wire current transformer 27 is connected with the phase A current incoming line, the phase A current outgoing line, the phase C current incoming line and the phase C current outgoing line of the three-phase three-wire electric energy meter 7 sequentially through the wiring terminal row of the output end, the controlled switch of the second relay group 18 and the wiring terminal row of the three-phase three-wire electric energy meter 7, and the three-phase three-wire current transformer 27 is used for reducing the current value to meet the incoming line detection current amplitude value of the three-phase three-wire electric energy meter 7;
the second voltage selection switch 10 is connected with a third relay group 19, the third relay group 19 is connected with the three-phase four-wire electric energy meter 6 through a meter front switch 20, namely, a controlled switch of the third relay group 19 is connected to a wiring terminal row of the three-phase four-wire electric energy meter 6 through the meter front switch 20 and is connected with an A-phase voltage line, a B-phase voltage line and a C-phase voltage line of the three-phase four-wire electric energy meter 6;
the second current selection switch 11 is connected with a fourth relay group 21, the fourth relay group 21 is connected with the three-phase four-wire electric energy meter 6 through a three-phase four-wire current transformer 26, namely, the output end of the three-phase four-wire current transformer 26 is connected with an A-phase current inlet wire, an A-phase current outlet wire, a B-phase current inlet wire, a B-phase current outlet wire, a C-phase current inlet wire and a C-phase current outlet wire of the three-phase four-wire electric energy meter 6 sequentially through a wiring terminal row of the output end, a controlled switch of the fourth relay group 21 and a wiring terminal row of the three-phase four-wire electric energy meter 6; the three-phase four-wire current transformer 26 is used for reducing the current value to meet the incoming line detection current amplitude of the three-phase four-wire electric energy meter 6.
The input end of the alternating current contactor is connected with a power supply through an air switch, the output end of the alternating current contactor is respectively connected with the primary side of a first transformer 12, the primary side of a second transformer 12, the primary side of a third transformer 13 and the primary side of a three-phase three-wire voltage transformer 17, and the primary side of the three-phase three-wire voltage transformer 17 is connected with a three-phase three-wire primary voltage switch in a main control box compartment 4 and used for setting a primary voltage loss fault of the three-phase three-wire voltage transformer; the secondary side of the first transformer 12 is connected with the first input end coil of the three-phase three-wire current transformer 27 and the first input end coil of the three-phase four-wire current transformer 26 through the load 15, the secondary side of the second transformer 13 is connected with the second input end coil of the three-phase four-wire current transformer 26 through the load 15, and the secondary side of the third transformer 14 is connected with the second input end coil of the three-phase three-wire current transformer 27 and the third input end coil of the three-phase four-wire current transformer 26 through the load 15.
The first simulation three-phase three-wire voltage transformer 22 and the second simulation three-phase three-wire voltage transformer 23 are communicated with the three-phase three-wire voltage transformer 17 and serve as three-phase three-wire PT operation ends of the workbench; the first simulation three-phase three-wire current transformer 24 and the second simulation three-phase three-wire current transformer 25 are communicated with the three-phase three-wire current transformer 27 and serve as three-phase three-wire CT operation ends of the workbench.
The method for simulating the fault of the electric power metering device simulation field workbench specifically comprises the following steps:
s1, three-phase three-wire system line field simulation
1) The first relay set 16 is controlled to adjust the connection of electric wires through the first voltage selection switch 8, the simulation of field conditions of single-phase voltage loss, two-phase voltage loss, voltage unbalance, reverse phase sequence and different voltage and current in a three-phase three-wire system line is set, and the fault condition is checked from the three-phase three-wire electric energy meter 7;
2) the second relay group 18 is controlled to adjust the connection of electric wires through the first current selection switch 9, the simulation of field conditions such as single-phase current loss, total current loss, current imbalance, reverse phase sequence, reverse current connection and the like in a three-phase three-wire system line is set, and the fault condition is checked from the three-phase three-wire electric energy meter 7;
3) simultaneously controlling a first voltage selection switch 8 and a first current selection switch 9, and setting comprehensive field fault conditions in the three-phase three-wire system line;
s2. three-phase four-wire system line field simulation
1) Controlling a third relay group 19 to adjust the connection of electric wires through a second voltage selection switch 10, setting field condition simulation of single-phase voltage loss, two-phase voltage loss, voltage unbalance, different voltages and currents and the like in a three-phase four-wire system circuit, and checking fault conditions from a three-phase four-wire electric energy meter 6;
2) the fourth relay group 21 is controlled to adjust the connection of electric wires through the second current selection switch 11, the simulation of field conditions such as single-phase current loss, two-phase current loss, total current loss, current imbalance, voltage and current different phases, current reverse connection and the like in a three-phase four-wire system circuit is set, and the fault condition is checked from the three-phase four-wire electric energy meter 6;
3) simultaneously controlling a second voltage selection switch 10 and a second current selection switch 11, and setting the comprehensive field fault condition in the three-phase four-wire system line;
s3, on-site fault simulation switching of three-phase three-wire and three-item four-wire metering device
And controlling three-phase three-wire and three-phase four-wire high-low voltage change-over switches in the power supply and load device compartment 5, and switching the field fault simulation of the three-phase three-wire and three-wire four-wire metering device.
In this embodiment, the output voltages of the first transformer 12, the second transformer 13, and the third transformer 14 are 24V or 4V, the output voltage of the three-phase three-wire voltage transformer 17 is 100V, and the output voltage of the rectifier 28 is 24V.
As shown in fig. 5, in the three-phase four-wire line connection simulation, the second voltage selection switch 10 is used for rotary selection, so as to respectively simulate the ABC three-phase voltage correct connection, the ACB and BCA wrong connection, and the AB and a single-phase voltage loss or full voltage loss. The rotation selection is carried out through the second current selection switch 11, and the wrong wiring conditions such as the correct wiring of ABC three-phase current and the reverse connection of A-phase reverse current BC and AB-phase open circuit C, BCA are simulated respectively. Through the second voltage selection switch 10 and the second current selection switch 11, all field fault conditions such as three-phase four-wire single-phase voltage loss, full voltage loss, phase failure, single-phase current loss, full current loss, voltage imbalance, current imbalance, reverse phase sequence, reverse connection of wires and the like can be simulated at the same time, which is just a few.
As shown in fig. 6, in the three-phase three-wire system wiring simulation, the ABC voltage correct wiring, the wrong wiring ACB, the AB correct C-phase open circuit, the wrong wiring BAC, the a-phase open circuit BC correct, and the like are simulated by performing the rotation selection through the first voltage selection switch 8. The first current selection switch 9 is used for rotary rotation selection to respectively simulate the conditions of correct AC current connection, correct A-phase C-phase reverse current, wrong CA connection, correct A-phase connection, open C-phase connection, reverse AC current and the like. Through the first voltage selection switch 8 and the first current selection switch 9, all field fault conditions such as three-phase three-wire single-phase voltage loss, full voltage loss, phase failure, single-phase current loss, full current loss, voltage imbalance, current imbalance, reverse phase sequence, reverse connection of wires and the like can be simulated at the same time, and the above conditions are just a few.
In the aspect of current electric power teaching and training, theoretical training is emphasized, the actual operation of wiring of an electric energy meter of an electric power metering device is less in training, but the most basic actual operation is the key for quickly enabling electric power workers to work on duty and improving service capacity. By adopting the invention, after the openable door at the front end of the worktable compartment is opened, the connection condition of each part can be seen, thereby facilitating visual teaching. Trainees who are trained show that through the field simulation training of the workbench, real objects which are completely in contact with a simulation field are convenient to understand, the training in the aspect of power utilization inspection is more comprehensive, inspection knowledge can be mastered, problems occurring on the field can be simulated and explained on the workbench, people can learn and research knowledge in the aspect of wrong wiring and training in the aspect of use of instruments and meters, and the practical operation of a meter reader in the aspect of learning meter reading, representing reading of numerical values, fault recognition, specific operation and the like is greatly improved.
By adopting the invention, the training efficiency and the training quality can be greatly improved, the trainees can learn the training better and the teaching time is saved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
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