Long-distance power transmission demonstration experiment device

Abstract

The application provides a long-distance power transmission demonstration experiment device, which comprises a power supply; a first demonstration component comprising a first transmission line, a second transmission line, a step-up transformer, a step-down transformer, a first loss lamp and at least one first load lamp; the first loss lamp is used for simulating and displaying the electrical loss of the transmission line; the primary coil of the step-up transformer is connected in series with the power supply through the first transmission line and the second transmission line, the secondary coil of the step-up transformer is connected in series with the first loss lamp and the primary coil of the step-down transformer, the secondary coil of the step-down transformer is connected in series with the at least one first load lamp, and the first load lamps are connected in parallel. By arranging the first loss lamp in the long-distance power transmission demonstration experiment device, the first loss lamp can not only simulate the line resistance of long-distance power transmission, but also visually display the power consumption in the long-distance power transmission process, thereby improving the use effect of the long-distance power transmission demonstration experiment device and further expanding the use scene of the long-distance power transmission demonstration experiment device.

Description

Technical Field

[0001] This application belongs to the field of teaching aids technology, and in particular relates to a long-distance power transmission demonstration experimental device. Background Technology

[0002] High school physics textbooks include content on long-distance power transmission, but teachers primarily rely on formulas for explanation, which can be challenging for students to grasp. Consequently, various demonstration devices for long-distance power transmission have gradually emerged, providing convenience for teachers' instruction.

[0003] However, the demonstration processes in existing long-distance power transmission demonstration devices are still not intuitive enough. Utility Model Content

[0004] This application provides a long-distance power transmission demonstration experimental device, which can visualize the power loss of long-distance power transmission, improve the effectiveness of the long-distance power transmission demonstration experimental device, and expand the application scenarios of the long-distance power transmission demonstration experimental device.

[0005] This application provides a long-distance power transmission demonstration experimental device, including:

[0006] Power supply, used to provide alternating current with a preset voltage;

[0007] The first demonstration component includes a first transmission line, a second transmission line, a step-up transformer, a step-down transformer, a first loss lamp, and at least one first load lamp. The first loss lamp has a set resistance value to simulate and demonstrate the electrical loss of the transmission line. The primary coil of the step-up transformer is connected in series with the power supply through the first and second transmission lines. The secondary coil of the step-up transformer is connected in series with the first loss lamp and the primary coil of the step-down transformer. The secondary coil of the step-down transformer is connected in series with the at least one first load lamp, and each of the first load lamps is connected in parallel.

[0008] Optionally, the first demonstration component further includes at least one first switch, each first switch being connected in series with each of the first load lamps, and each first switch being used to connect or disconnect the power supply to its corresponding first load lamp.

[0009] Optionally, the step-up transformer has at least two turns ratio interfaces, and the turns ratios of the primary and secondary coils of the step-up transformer corresponding to each of the turns ratio interfaces are different.

[0010] Optionally, the step-down transformer has at least two turns ratio interfaces, and the turns ratios of the primary and secondary coils of the step-down transformer corresponding to each of the turns ratio interfaces are different.

[0011] Optionally, the first demonstration component further includes a first ammeter connected in series with the first loss lamp, the first ammeter being used to detect the current at the first loss lamp; and / or

[0012] The first demonstration component also includes a first voltmeter connected in parallel with the first loss lamp, the first voltmeter being used to detect the voltage of the first loss lamp.

[0013] Optionally, the long-distance power transmission demonstration experimental device further includes a second demonstration component, which includes a third transmission line, a fourth transmission line, and at least one second load lamp. The at least one second load lamp is connected in series with the power supply through the third transmission line and the fourth transmission line, and each second load lamp is connected in parallel.

[0014] Optionally, the second demonstration component further includes a second loss lamp, which is connected in series with the at least one second load lamp and connected in series with the power supply via the third and fourth transmission lines. The second loss lamp has a set resistance value to simulate and demonstrate the electrical loss of the transmission lines.

[0015] Optionally, the second demonstration component further includes a second ammeter connected in series with the second loss lamp, the second ammeter being used to detect the current at the second loss lamp; and / or

[0016] The second demonstration component also includes a second voltmeter connected in parallel with the second loss lamp, the second voltmeter being used to detect the voltage of the second loss lamp.

[0017] Optionally, the second demonstration component further includes at least one second switch, each second switch being connected in series with each of the second load lamps, and each second switch being used to turn on or off the power supply to its corresponding second load lamp.

[0018] Optionally, the number of the first load lamps is three, and the number of the second load lamps is three.

[0019] In the long-distance power transmission demonstration experimental device provided in this application embodiment, by setting a first loss lamp in the long-distance power transmission demonstration experimental device, the first loss lamp can not only serve as a simulation of the line resistance of long-distance power transmission, but also visualize the power consumption of the long-distance power transmission process, thereby improving the use effect of the long-distance power transmission demonstration experimental device and expanding the application scenarios of the long-distance power transmission demonstration experimental device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0022] Figure 1 A circuit diagram of a long-distance power transmission demonstration experimental device provided in an embodiment of this application.

[0023] Figure 2 Another circuit structure diagram of the long-distance power transmission demonstration experimental device provided in the embodiments of this application.

[0024] Figure 3 Another circuit structure diagram of the long-distance power transmission demonstration experimental device provided in the embodiments of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] The principle of "long-distance power transmission" in physics textbooks is rather abstract and is one of the teaching difficulties. Students struggle to understand the core logic of "high-voltage power transmission reducing losses" due to a lack of intuitive experimental observation. Therefore, various long-distance power transmission demonstration experimental devices have gradually emerged. However, the demonstration processes of existing long-distance power transmission demonstration experimental devices are still not intuitive enough.

[0027] In order to visualize all the demonstration processes of the long-distance power transmission demonstration experimental device, this application provides a long-distance power transmission demonstration experimental device, which will be described below in conjunction with the accompanying drawings.

[0028] For example, please refer to Figure 1 As shown, Figure 1 This is a schematic diagram of a circuit structure for a long-distance power transmission demonstration experimental device provided in an embodiment of this application. The long-distance power transmission demonstration experimental device 100 in this embodiment includes a power supply AC and a first demonstration component 110.

[0029] The AC power supply is used to provide alternating current with a preset voltage. For example, the AC power supply can be a student power supply with a preset voltage of 12V.

[0030] The first demonstration component 110 includes a first transmission line, a second transmission line, a step-up transformer T1, a step-down transformer T2, a first loss lamp L0, and at least one first load lamp L1.

[0031] The first and second transmission lines are also power transmission conductors, with one end of each line connected to the AC power supply. The first and second transmission lines can be mounted on a circuit board, while the AC power supply is separate and independent of the circuit board. For ease of connection, terminals can be provided on the circuit board corresponding to the first and second transmission lines.

[0032] The step-up transformer T1 has a primary coil and a secondary coil. The primary coil of the step-up transformer T1 is connected in series with the power supply AC through a first transmission line and a second transmission line. The secondary coil of the step-up transformer T1 is connected in series with the first loss lamp L0. The step-up transformer T1 is used to step up the AC voltage provided by the power supply AC to simulate the high-voltage process of transmitting electricity through high voltage in real life.

[0033] The step-down transformer T2 has a primary coil and a secondary coil. The primary coil of the step-down transformer T2 is connected in series with the first loss lamp L0, and the secondary coil of the step-down transformer T2 is connected in series with at least one first load lamp L1. The step-down transformer T2 is used to reduce the voltage to a voltage value that matches the first load lamp L1, so as to meet the power demand of the first load lamp L1.

[0034] The first loss lamp L0 has a set resistance value. The set resistance value of the first loss lamp L0 is used to simulate the line loss during long-distance transmission. That is, the electrical loss on the transmission line can be simulated according to the set resistance value, and the electrical loss process is displayed by the brightness of the first loss lamp L0.

[0035] It should be noted that this embodiment uses a first loss lamp L0 to simulate the total resistance of the first and second transmission lines, and should not be construed as a limitation on the number of first loss lamps L0. In actual use, loss lamps can also be connected in series on the first and second transmission lines respectively. The resistance of the loss lamp on the first transmission line is used to simulate the resistance of the first transmission line, and the resistance of the loss lamp on the second transmission line is used to simulate the resistance of the second transmission line.

[0036] At least one first load lamp L1 is used to simulate the electricity consumption of different users in daily life. That is, the impact of high-voltage transmission on line loss and user voltage can be seen by comparing experiments between different numbers of first load lamps L1.

[0037] The long-distance power transmission demonstration experimental device 100 provided in this application embodiment improves the usability of the long-distance power transmission demonstration experimental device 100 by setting a first loss lamp L0 in the long-distance power transmission demonstration experimental device 100. The first loss lamp L0 can not only serve as the line resistance to simulate long-distance power transmission, but also visualize the power consumption of the long-distance power transmission process, thereby expanding the application scenarios of the long-distance power transmission demonstration experimental device 100.

[0038] It should be noted that for long-distance power transmission demonstration experiments, if only the first loss lamp L0 is displayed visually, students cannot know the actual current and voltage loss values, and they cannot compare the current and voltage loss values ​​under different variable environments.

[0039] Please see Figure 2 As shown, Figure 2 This is another circuit diagram of the long-distance power transmission demonstration experimental device provided in this application embodiment. The first demonstration component 110 in this application embodiment further includes at least a first ammeter A1, which is connected in series with a first loss lamp L0. The first ammeter A1 is used to detect the current at the first loss lamp L0. Based on the power calculation formula P=I... 2 With R=UI, after selecting the set resistance value of the first loss lamp L0, the value can be intuitively seen from the numerical value based on the current or voltage flowing through the first loss lamp L0.

[0040] Optionally, a first voltmeter can be set on the first demonstration component 110. The first voltmeter is connected in parallel with the first loss lamp L0 and is used to detect the voltage of the first loss lamp L0.

[0041] Optionally, a first ammeter A1 and a first voltmeter can be set on the first demonstration component 110 at the same time to detect the current and voltage at the first loss lamp L0, so as to facilitate data comparison.

[0042] In order to enable the same long-distance power transmission demonstration experimental device 100 to have multiple experimental modes and improve the utilization rate of the long-distance power transmission demonstration experimental device 100, the embodiments of this application have also improved it in at least three aspects.

[0043] Firstly, to meet the requirements of the long-distance power transmission demonstration experimental device 100 for controlling variables during the experiment, the first demonstration component 110 of this application embodiment further includes at least one first switch K1. Each first switch K1 is connected in series with each first load lamp L1, and each first switch K1 is used to connect or disconnect the power supply to its corresponding first load lamp L1. For example, the first demonstration component 110 may include three first load lamps L1 and three first switches K1. In the long-distance power transmission demonstration experiment, one, two, or three first load lamps L1 can be selected to be powered to compare the impact of different numbers of first load lamps L1 on line losses and user voltage in high-voltage AC power transmission while other conditions remain unchanged.

[0044] Secondly, to meet the requirements of the long-distance power transmission demonstration experimental device 100 for controlling variables during the experiment, this application embodiment also sets up multiple turns ratio interfaces for the step-up transformer T1. For example, the step-up transformer T1 has at least two turns ratio interfaces, and the turns ratios of the primary and secondary coils of the step-up transformer T1 corresponding to each turns ratio interface are different, thus the step-up ratio of the corresponding step-up transformer T1 is different. For example, the AC voltage of the power supply can be increased by 2 times, 4 times or 8 times through the step-up transformer T1, thereby allowing the study of the relationship between line loss and voltage increase factor during high-voltage power transmission.

[0045] Of course, the voltage increase factor can also be achieved by the step-down transformer T2. For example, the step-down transformer T2 has at least two turns ratio interfaces. The turns ratio of the primary and secondary coils of the step-down transformer T2 corresponding to each turns ratio interface is different. Therefore, the voltage reduction factor of the step-down transformer T2 is different. When the step-up transformer T1 increases the voltage by a set factor or does not increase the voltage, the voltage increase factor of the voltage at the first load lamp L1 relative to the power supply voltage can be obtained according to the voltage reduction factor of the step-down transformer T2. This can also be used to explore the relationship between line loss and voltage increase factor in high-voltage power transmission.

[0046] In some other embodiments, at least two turns ratio interfaces can be provided for the step-up transformer T1 and at least two turns ratio interfaces can be provided for the step-down transformer T2. The voltage increase factor relative to the power supply voltage can be determined by the combination of the voltage increase factor of the step-up transformer T1 and the voltage decrease factor of the step-down transformer T2.

[0047] Thirdly, to meet the requirements of the long-distance power transmission demonstration experimental device 100 for controlling variables during the experiment, please refer to... Figure 3 As shown, Figure 3This is another circuit diagram of the long-distance power transmission demonstration experimental device provided in this application embodiment. The long-distance power transmission demonstration experimental device 100 in this application embodiment also includes a second demonstration component 120. The second demonstration component 120 includes a third transmission line, a fourth transmission line, and at least one second load lamp L2. The at least one second load lamp L2 is connected in series with a power supply AC via the third and fourth transmission lines, and all second load lamps L2 are connected in parallel. The second load lamps L2 are used to simulate user electrical loads. The number of second load lamps L2 can be the same as the number of first load lamps L1, such as three for both the first load lamp L1 and the second load lamp L2, thus facilitating the operation of control variables. In other words, the second demonstration component 120 represents the low-voltage AC power transmission process, which can be compared with the high-voltage AC power transmission process represented by the first demonstration component 110, thereby helping students understand the principle of high-voltage transmission using transformers.

[0048] The second demonstration component 120 also includes a second loss lamp L3 and a second ammeter A2.

[0049] The second loss lamp L3 is connected in series with at least one second load lamp L2, and is connected in series with the power supply AC via a third transmission line and a fourth transmission line. The second loss lamp L3 has a set resistance value to simulate line resistance and to simulate and demonstrate the electrical loss of the transmission line. The specifications and model of the second loss lamp L3 can be the same as those of the first loss lamp L0 to facilitate comparative experiments.

[0050] It should be noted that this embodiment uses a second loss lamp L3 to simulate the total resistance of the third and fourth transmission lines, and should not be construed as a limitation on the number of second loss lamps L3. In actual use, loss lamps can also be connected in series on the third and fourth transmission lines respectively. The resistance of the loss lamp on the third transmission line is used to simulate the resistance of the third transmission line, and the resistance of the loss lamp on the fourth transmission line is used to simulate the resistance of the fourth transmission line.

[0051] The second ammeter A2 is connected in series with the second loss lamp L3. The second ammeter A2 is used to detect the current at the second loss lamp L3.

[0052] It should be noted that a second voltmeter can also be connected in parallel at the second loss lamp L3 to detect the voltage of the second loss lamp L3. The second ammeter A2 and the second voltmeter can also be set simultaneously to facilitate the recording and comparison of current and voltage values ​​separately.

[0053] The detection instrument installed at the second loss lamp L3 is the same as that at the first loss lamp L0, so as to compare the line loss during high-voltage transmission and low-voltage transmission.

[0054] Similarly, for at least one second load lamp L2, in order to simulate the power consumption of different numbers of users, the second demonstration component 120 also includes at least one second switch K2, each second switch K2 being connected in series with each second load lamp L2, and each second switch K2 being used to connect or disconnect the power supply of its corresponding second load lamp L2.

[0055] The long-distance power transmission demonstration experimental device 100 of this application embodiment can dynamically change the step-up ratio by setting a step-up transformer T1 and a step-down transformer T2 with a variable turns ratio to display the line loss effect through the first loss lamp L0; and can dynamically change the number of users, i.e. the number of the first load lamp L1 and the second load lamp L2, by setting a first switch K1 and a second switch K2 to observe the line loss and user voltage changes; and can also realize the comparison of high-voltage transmission and low-voltage transmission line losses by setting a first demonstration component 110 and a second demonstration component 120. That is, the same experimental device can realize comparative experiments on multiple phenomena, with high device utilization, saving experimental costs and broadening the application scenarios of the long-distance power transmission demonstration experimental device 100.

[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0057] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0058] The long-distance power transmission demonstration experimental device provided in the embodiments of this application has been described in detail above. Specific examples have been used in this article to illustrate the principle and implementation of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A long-distance power transmission demonstration experimental device, characterized in that, include: Power supply, used to provide alternating current with a preset voltage; The first demonstration component includes a first transmission line, a second transmission line, a step-up transformer, a step-down transformer, a first loss lamp, and at least one first load lamp. The first loss lamp has a set resistance value to simulate and demonstrate the electrical loss of the transmission line. The primary coil of the step-up transformer is connected in series with the power supply through the first and second transmission lines. The secondary coil of the step-up transformer is connected in series with the first loss lamp and the primary coil of the step-down transformer. The secondary coil of the step-down transformer is connected in series with the at least one first load lamp, and each of the first load lamps is connected in parallel.

2. The long-distance power transmission demonstration experimental device according to claim 1, characterized in that, The first demonstration component also includes at least one first switch, each first switch being connected in series with each of the first load lamps, and each first switch being used to connect or disconnect the power supply to its corresponding first load lamp.

3. The long-distance power transmission demonstration experimental device according to claim 1, characterized in that, The step-up transformer has at least two turns ratio interfaces, and the turns ratios of the primary and secondary coils of the step-up transformer corresponding to each of the turns ratio interfaces are different.

4. The long-distance power transmission demonstration experimental device according to claim 1 or 3, characterized in that, The step-down transformer has at least two turns ratio interfaces, and the turns ratios of the primary and secondary coils of the step-down transformer corresponding to each of the turns ratio interfaces are different.

5. The long-distance power transmission demonstration experimental device according to claim 1, characterized in that, The first demonstration component further includes a first ammeter connected in series with the first loss lamp, the first ammeter being used to detect the current at the first loss lamp; and / or The first demonstration component also includes a first voltmeter connected in parallel with the first loss lamp, the first voltmeter being used to detect the voltage of the first loss lamp.

6. The long-distance power transmission demonstration experimental device according to claim 1, characterized in that, The long-distance power transmission demonstration experimental device also includes a second demonstration component, which includes a third transmission line, a fourth transmission line, and at least one second load lamp. The at least one second load lamp is connected in series with the power supply through the third transmission line and the fourth transmission line, and each second load lamp is connected in parallel.

7. The long-distance power transmission demonstration experimental device according to claim 6, characterized in that, The second demonstration component also includes a second loss lamp, which is connected in series with the at least one second load lamp and connected in series with the power supply via the third and fourth transmission lines. The second loss lamp has a set resistance value to simulate and demonstrate the electrical loss of the transmission lines.

8. The long-distance power transmission demonstration experimental device according to claim 7, characterized in that, The second demonstration component also includes a second ammeter connected in series with the second loss lamp, the second ammeter being used to detect the current at the second loss lamp; and / or The second demonstration component also includes a second voltmeter connected in parallel with the second loss lamp, the second voltmeter being used to detect the voltage of the second loss lamp.

9. The long-distance power transmission demonstration experimental device according to claim 7, characterized in that, The second demonstration component also includes at least one second switch, each second switch being connected in series with each of the second load lamps, and each second switch being used to turn on or off the power supply to its corresponding second load lamp.

10. The long-distance power transmission demonstration experimental device according to claim 6, characterized in that, The number of first load lamps is three, and the number of second load lamps is three.

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