Simulation training device for mutual inductor meter user in low-voltage transformer area
The simulation training device, consisting of a programmable virtual load power supply and a fault simulator, solves the problem of simulating the transformation ratio and fault scenarios in real low-voltage transformer training, and achieves efficient training and assessment.
Patent Information
- Application Number
- CN202520079137.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing training methods for real low-voltage instrument transformers cannot effectively simulate different transformation ratios and fault scenarios, resulting in redundant construction, equipment redundancy, and low training efficiency, making it impossible to conduct targeted training and assessment.
The simulation training device consists of a programmable virtual load power supply, a current booster, a current open circuit protection unit, and a fault simulator. It simulates different transformation ratios and fault scenarios through the control of current and voltage signals, and conducts simulation training in conjunction with real junction boxes.
It enables rapid ratio changes, simulates various current transformer types, saves resources, and allows for targeted training and assessment, thus improving training efficiency.
Smart Images
Figure CN223884080U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a low -voltage transformer table user simulation training device of area belongs to current transformer technical field. BACKGROUND
[0002] Low -voltage transformer user as low -voltage transformer area common user type, it is necessary to simulate simulation training to its working scene, working principle, common exception etc. Current conventional training mode is to use real low -voltage transformer, terminal box, transformer, electric energy meter etc. to build low -voltage transformer user scene and train.
[0003] In real user scene, different current transformers of different capacity will be configured. If different ratio transformers are needed to simulate during training or examination, multiple transformer types need to be configured, which causes problems such as repeated construction, equipment redundancy and resource dissipation. It is time-consuming and laborious to replace different ratio transformers, which is not conducive to the rapid development of training and examination. In addition, real transformers cannot simulate the faults of current transformer itself, such as transformer ratio error, which cannot provide intuitive training and examination for trainees.
[0004] The current conventional training mode uses real terminal box to build training scene. Real terminal box can only restore normal working scene and cannot simulate terminal box damage and other abnormalities in actual work, which cannot provide targeted training and examination for trainees. UTILITY MODEL CONTENTS
[0005] In order to solve the problems existing in the prior art, the utility model provides a low -voltage transformer table user simulation training device of area.
[0006] The technical scheme of the utility model is as follows:
[0007] A low -voltage transformer table user simulation training device of area, comprising a program-controlled virtual load power supply, a current riser and a current open circuit protection unit and a fault simulator installed in the simulation device; and an isolation knife switch, a simulation transformer, a simulation terminal box and a three-phase four-wire transformer simulation electric energy meter installed on the panel outside the simulation device; the simulation terminal box is connected with the fault simulator;
[0008] One current signal source in the program-controlled virtual load power supply is connected to the input end of the secondary terminal of the simulation transformer through the current open circuit protection unit; the output end of the secondary terminal is connected to the three-phase four-wire transformer simulation electric energy meter through the simulation terminal box and the fault simulator to form a secondary metering loop;
[0009] Another current signal source in the program-controlled dummy load power supply is amplified through a current booster, sequentially passes through a current open circuit protection unit and an isolation knife switch, penetrates into the incoming line end of the simulation transformer, and then penetrates out of the outgoing line end of the simulation transformer, sequentially passes through a current open circuit protection unit and a current booster, and is connected back to the program-controlled dummy load power supply to form a primary metering loop.
[0010] The voltage signal source in the program-controlled dummy load power supply is directly connected to the incoming line end of the isolation knife switch in the primary metering loop to provide a voltage signal for the primary metering loop; and the three-phase four-wire transformer simulation electric energy meter is connected to the outgoing line end of the isolation knife switch through the fault simulator and the simulation terminal box to obtain a voltage signal.
[0011] Preferably, the simulation transformer adopts a shell of a real current transformer; a through hole is formed in the bottom of the simulation transformer; and the current source signal of the secondary metering loop is connected to the input end of the secondary terminal of the simulation transformer through the through hole.
[0012] Preferably, the simulation terminal box is a real terminal box with internal voltage copper columns cut off; the output end of the secondary terminal of the simulation transformer is connected to the input end of the fault simulator through the simulation terminal box; and the output end of the fault simulator is connected to the three-phase four-wire transformer simulation electric energy meter.
[0013] Preferably, the program-controlled dummy load power supply is a distributed dummy load voltage source.
[0014] The utility model has the following beneficial effects:
[0015] 1. The utility model provides a current source signal for the primary metering loop and the secondary metering loop through the program-controlled dummy load power supply, simulates the primary current and the secondary current of the simulation current transformer, changes the transformation ratio of the current transformer by changing the output of the current signal source, and simulates the abnormality of the current transformer and the abnormality of the transformation ratio of the current transformer.
[0016] 2. The utility model is transformed by using a real terminal box, simulates the electricity stealing abnormal types that may occur in actual production through the fault simulator, and can be trained pertinently.
[0017] 3. The utility model changes the transformation ratio of the current transformer by using the program-controlled dummy load power supply, can simulate various types of current transformers, and saves the problems of repeated construction, equipment redundancy and resource dissipation caused by the configuration of various types of transformers. DRAWINGS
[0018] Figure 1 It is a connection schematic diagram of the simulation transformer table user simulation training device for low-voltage transformer area;
[0019] Figure 2 It is a schematic diagram of the structure principle of the simulation transformer;
[0020] Figure 3 This is a schematic diagram illustrating the structural principle of a simulated junction box;
[0021] The reference numerals in the figure are as follows:
[0022] 1. Programmable virtual load power supply; 2. Current booster; 3. Current open circuit protection unit; 4. Isolating switch; 5. Simulated current transformer; 6. Simulated junction box; 7. Fault simulator; 8. Three-phase four-wire current transformer simulated energy meter. Detailed Implementation
[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0024] like Figure 1 As shown, the low-voltage transformer meter user simulation training device of this embodiment includes a programmable virtual load power supply 1, a current booster 2, a current open circuit protection unit 3, and a fault simulator 7 installed inside the simulation device; and an isolating switch 4, a simulated transformer 5, a simulated junction box 6, and a three-phase four-wire transformer simulated energy meter 8 installed on the external panel of the simulation device; the simulated junction box 6 is connected to the fault simulator 7.
[0025] In this embodiment, Figure 1 This is a schematic diagram of the user simulation training device for the instrument transformers in this low-voltage distribution area. The specific connection between each unit is shown in the figure.
[0026] One current signal source in the programmable virtual load power supply 1 is connected to the input terminal of the secondary wiring terminal of the simulation transformer 5 after passing through the current open circuit protection unit 3; the output terminal of the secondary wiring terminal is connected to the three-phase four-wire transformer simulation energy meter 8 through the simulation junction box 6 and the fault simulator 7 to form a secondary metering circuit.
[0027] Another current signal source in the programmable virtual load power supply 1 is amplified by the current booster 2, and then passes through the current open circuit protection unit 3 and the isolation switch 4 in sequence to enter the input terminal of the simulated current transformer 5, and then passes out of the output terminal of the simulated current transformer 5 in sequence to pass through the current open circuit protection unit 3 and the current booster 2 back to the programmable virtual load power supply 1 to form a primary metering circuit.
[0028] The voltage signal source in the programmable virtual load power supply 1 is directly connected to the incoming terminal of the isolating switch 4 in the primary metering circuit to provide a voltage signal for the primary metering circuit; the three-phase four-wire current transformer simulated energy meter 8 is connected to the outgoing terminal of the isolating switch 4 via the fault simulator 7 and the simulation junction box 6 to obtain the voltage signal.
[0029] In the embodiment, the program-controlled dummy load power supply includes 1-6 current source signals, wherein 1-3 current source signals are used to provide current signals for the secondary metering circuit, and 4-6 current source signals are used to provide current source signals for the primary metering circuit. By changing the current size and output state of the program-controlled current source 1-3 and 4-6, the transformer ratio change simulation and the transformer body fault simulation can be performed.
[0030] The voltage source signal in the program-controlled dummy load power supply is directly input into the primary metering circuit, and together with the current source signal in the primary metering circuit, simulates the real power consumption scene of the transformer meter user, and supports real voltage measurement using voltage meters and other tools.
[0031] Further, the simulation transformer 5 adopts the shell of a real current transformer; the bottom of the simulation transformer 5 is provided with a through hole; the current source signal of the secondary metering circuit passes through the through hole and is connected to the input end of the secondary terminal of the simulation transformer 5.
[0032] In the embodiment, the structure of the simulation transformer 5 is as shown in Figure 2 The simulation transformer 5 does not include a core and a winding inside, uses a real transformer shell, opens a hole at the bottom of the transformer, and directly connects the current signal output by the dummy load power supply to the secondary terminal of the transformer (S1 and S2 in the figure represent two ends of the secondary terminal, and P1 and P2 represent the incoming line end and the outgoing line end of the simulation transformer, respectively) to realize the simulation of the secondary current output of the current transformer.
[0033] Further, the simulation terminal box 6 is a real terminal box with the internal voltage copper column cut off; the output end of the secondary terminal of the simulation transformer 5 is connected to the input end of the fault simulator 7 through the simulation terminal box 6, and the output end of the fault simulator 7 is connected to the simulation power meter 8 of the three-phase four-wire transformer.
[0034] In the embodiment, the structure of the simulation terminal box is as shown in Figure 3 The real terminal box is used, the voltage copper column of the real terminal box is cut off (to ensure that the copper column is not conductive after being cut off, and is firm and reliable), the program-controlled fault simulator is connected to the terminal of the terminal box and installed at the back of the terminal box, is located inside the simulation training device, and the front appearance of the terminal box is consistent with that of the real terminal box.
[0035] The fault simulator can realize the simulation of voltage, current metering circuit voltage open phase, voltage misphase, current short circuit and other abnormalities.
[0036] Further, the program-controlled dummy load power supply 1 is a distributed dummy load voltage source.
[0037] In the embodiment, the programmable dummy load power supply 1 adopts a distributed dummy load voltage source to provide a voltage signal for a primary loop of a simulation unit, the voltage size is adjustable, and the adjustment range can be set according to the voltage drop caused by factors such as the low-voltage distribution line topological structure and the line length, to simulate the operation conditions of different voltages of each meter in the real transformer area.
[0038] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A low-voltage transformer substation mutual inductor table user simulation training device, characterized in that, The programmable dummy load power supply (1), the current riser (2), the current open circuit protection unit (3) and the fault simulator (7) are installed inside the simulation device. The isolation switch (4), the simulation transformer (5), the simulation terminal box (6) and the three-phase four-wire transformer simulation electric energy meter (8) are installed on the panel outside the simulation device. One current signal source in the programmable dummy load power supply (1) is connected to the input end of the secondary terminal of the simulation transformer (5) through the current open circuit protection unit (3), and the output end of the secondary terminal is connected to the three-phase four-wire transformer simulation electric energy meter (8) through the simulation terminal box (6) and the fault simulator (7) to form a secondary metering circuit. Another current signal source in the programmable dummy load power supply (1) is amplified by the current riser (2), and then sequentially passes through the current open circuit protection unit (3) and the isolation switch (4) to enter the incoming terminal of the simulation transformer (5), and then sequentially passes through the current open circuit protection unit (3) and the current riser (2) to return to the programmable dummy load power supply (1) to form a primary metering circuit. The voltage signal source in the programmable dummy load power supply (1) is directly connected to the incoming terminal of the isolation switch (4) in the primary metering circuit to provide a voltage signal for the primary metering circuit.
2. The low-voltage transformer table user simulation training device according to claim 1, characterized in that, The simulation transformer (5) adopts the shell of a real current transformer.
3. The low voltage transformer table user simulation training device according to claim 1, characterized in that, The simulation terminal box (6) is a real terminal box with the internal voltage copper column cut off.
4. The low voltage transformer table user simulation training device according to claim 1, characterized in that, The output end of the secondary terminal of the simulation transformer (5) is connected to the input end of the fault simulator (7) through the simulation terminal box (6), and the output end of the fault simulator (7) is connected to the three-phase four-wire transformer simulation electric energy meter (8). The programmable dummy load power supply (1) is a distributed dummy load voltage source.