Remote power transmission demonstrator

Abstract

The utility model discloses a long-distance power transmission demonstrator, comprising a power box used for simulating a power plant; a pair of leads used for simulating a high-voltage transmission line; the boosting assembly is connected with the power box and the starting ends of the pair of wires and used for simulating a boosting transformer so as to boost and output the output voltage of the power box. The step-down assembly is connected with the tail ends of the pair of wires and is used for simulating a step-down transformer so as to step down and output the voltage transmitted by the pair of wires; the low-voltage electric appliance is detachably connected with the pair of wires, can move along the pair of wires and is used for simulating a user side; and the high-voltage electric appliance is detachably connected with the pair of wires and can move along the pair of wires. The long-distance power transmission demonstrator can show the energy loss process on a power transmission line in the high-voltage power transmission process in a three-dimensional space, is beneficial for students to establish a physical model of long-distance high-voltage power transmission, and improves the teaching quality.

Description

Technical Field

[0001] This utility model relates to the field of teaching experiment and demonstration equipment technology, and in particular to a long-distance power transmission demonstrator. Background Technology

[0002] In high school physics teaching, when explaining the transmission of electrical energy, experiments are used to demonstrate the process of long-distance power transmission, showcasing the disadvantages of low-voltage power transmission and the advantages of high-voltage power transmission.

[0003] Currently, most experiments use demonstration boards to represent the physical models of long-distance power transmission and the situations of high and low voltage power transmission. For example, there is a demonstration device with Chinese patent number CN218497684U that can simulate high-voltage power transmission. Figure 11 The high-voltage power transmission and transformation simulation demonstration device shown above. The experimental principle of these teaching boards is to demonstrate that remote users cannot work normally under low-voltage transmission, while they can work normally under high-voltage transmission. However, using these teaching boards has the following problems:

[0004] 1. The above-mentioned teaching board is a single unit, and its dimensions are usually 60 cm x 40 cm for easy movement. Setting up a long-distance power transmission scenario in such a small space makes the various parts of the model crowded together, failing to reflect the grand scene of long-distance power transmission from the power plant to the user end, and instead giving people a cluttered feeling.

[0005] 2. The above-mentioned teaching board is a flat board. The transmission lines can only be fixed on the backing board, and each component can only be unfolded on a two-dimensional flat board. Therefore, it can only show from the results that remote users cannot work normally when the power is low voltage and that remote users can work normally when the power is high voltage. It cannot show the energy loss process on the power transmission line in three-dimensional space. However, the energy loss process is the main reason why high voltage power transmission is required. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems existing in the prior art and provide a long-distance power transmission demonstrator that can display the energy loss process on the transmission line during high-voltage power transmission in three-dimensional space, which is conducive to students building physical models of long-distance high-voltage power transmission and improving teaching quality.

[0007] To achieve the above-mentioned objectives of this utility model, this utility model provides a long-distance power transmission demonstrator, comprising: a power supply box for simulating a power plant; a pair of conductors for simulating a high-voltage transmission line; a step-up component for simulating a step-up transformer to boost the output voltage of the power supply box, respectively connected to the starting ends of the power supply box and the pair of conductors; a step-down component for simulating a step-down transformer to boost the output voltage of the pair of conductors, connected to the ends of the pair of conductors; a low-voltage electrical appliance for simulating a user end, detachably connected to the pair of conductors and movable along the pair of conductors; and a high-voltage electrical appliance detachably connected to the pair of conductors and movable along the pair of conductors.

[0008] Preferably, the power supply box is a power supply for high school students.

[0009] Preferably, the boost assembly has a boost transformer for boosting the output voltage of the power supply box.

[0010] Preferably, the step-down assembly has a step-down transformer for stepping down the voltage delivered by a pair of wires to the output voltage.

[0011] Preferably, both the boost assembly and the buck assembly include a support structure, the support structure including: a base; a pole vertically mounted on the base for simulating a utility pole; and a pair of terminals fixedly mounted on the top of the pole for electrically connecting the corresponding ends of a pair of wires.

[0012] Preferably, the step-up transformer of the step-up assembly and the step-down transformer of the step-down assembly are respectively fixedly installed on corresponding bases.

[0013] Preferably, the structure of the step-up transformer of the step-up assembly and the step-down transformer of the step-down assembly have the same turns ratio as the primary and secondary coils.

[0014] Preferably, it further includes a pair of clamping components for detachably fixing the base of the boosting component and the base of the depressurizing component to the surface of the support.

[0015] Preferably, it also includes a high-voltage electrical appliance for detachable connection with a pair of conductors.

[0016] Preferably, the boost assembly further includes a connection assembly for electrically connecting the power supply box and the boost transformer.

[0017] The beneficial effects of this utility model's long-distance power transmission demonstrator are reflected in the following aspects:

[0018] This utility model of a long-distance power transmission demonstrator consists of independent components such as a power supply box, wires, step-up components, step-down components, and low-voltage electrical appliances. When in use, the entire teaching aid can be unfolded in a line within a certain range according to the length of a pair of wires. The structure is simple, highlights the key points, and is easy to understand. After the components are connected, they form a three-dimensional long-distance power transmission demonstrator, which can more intuitively and three-dimensionally show students the energy loss process on the transmission line during high-voltage power transmission. This helps students build a physical model of long-distance high-voltage power transmission, deepens their understanding, and improves the quality of teaching.

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the power supply box used in this utility model;

[0021] Figure 2 This is a front view of the boost component, buck component, and wires used in this utility model after they are connected.

[0022] Figure 3 This is a top view of the boost component, buck component, and wires used in this utility model after they are connected.

[0023] Figure 4 This is a front view of the clamping assembly used in this utility model;

[0024] Figure 5 This is a top view of the clamping assembly used in this utility model;

[0025] Figure 6 This is a schematic diagram of the connecting component used in this utility model;

[0026] Figure 7 This is a simplified structural diagram of the low-voltage electrical appliance used in this utility model;

[0027] Figure 8 This is a simplified structural diagram of a high-voltage electrical appliance used in this utility model;

[0028] Figure 9 This is a perspective view of the low-voltage electrical appliance used in this utility model;

[0029] Figure 10 This is a perspective view of another high-voltage electrical appliance used in this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of a high-voltage power transmission and transformation simulation demonstration device used in existing technologies. Detailed Implementation

[0031] This invention provides a long-distance power transmission demonstrator for exploring "the situation of high and low voltage power transmission during power transmission and the energy loss process on long-distance high voltage transmission lines". It can be used by teachers for teaching demonstrations or by students for experiments. Through teaching demonstrations and hands-on experiments, it can help students better understand power transmission.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-10 The figures show schematic diagrams of the different components required for the long-distance power transmission demonstrator provided by this utility model. As can be seen from the figures, the long-distance power transmission demonstrator of this utility model includes: a power supply box 1 for simulating a power plant; a pair of conductors for simulating a high-voltage transmission line; a step-up component 2 for simulating a step-up transformer to boost the output voltage of the power supply box, which is connected to the starting ends of the power supply box and the pair of conductors respectively; a step-down component 3 for simulating a step-down transformer to boost the output voltage of the pair of conductors, which is connected to the ends of the pair of conductors; a low-voltage electrical appliance 8 for simulating a user end, which is detachably connected to the pair of conductors and can move along the pair of conductors; and a high-voltage electrical appliance 7 for detachably connected to the pair of conductors and can move along the pair of conductors.

[0034] Specifically, such as Figure 1 As shown, this utility model uses a power supply box to simulate a power plant, which can output AC power and regulated current. It is equipped with AC positive and negative connection ports (collectively referred to as AC connection ports 106) and regulated current positive and negative connection ports (collectively referred to as regulated current connection ports 105). In addition, it also includes an on button 104, an off button 103, a power indicator light 102, and a knob 101 for adjusting the voltage. The power supply box of this utility model can use a high school student experimental power supply capable of providing 6V AC power; its structure will not be described in detail here.

[0035] In this invention, a pair of conductors are used to simulate a high-voltage transmission line, namely, transmission conductors 4 and 5. The transmission conductors can be made of metal materials, and the length of the conductors can be determined according to the actual situation. Preferably, the conductors can be 1-meter long conductors made of nickel-cadmium alloy.

[0036] like Figure 2 , Figure 3 As shown, this utility model has a step-up component installed at the beginning of the conductor to simulate a step-up transformer to increase the voltage output from the power supply box, and a step-down component installed at the end of the conductor to simulate a step-down transformer to decrease the voltage transmitted by a pair of conductors.

[0037] The boost converter assembly includes a boost transformer 203 for boosting the output voltage of the power supply box and a support structure for mounting the boost transformer thereon. The support structure includes: a base; a pole 206 vertically mounted on the base to simulate a utility pole; and a pair of terminals fixedly mounted on the top of the pole for electrically connecting the corresponding ends of a pair of wires, namely, a positive terminal 209 and a negative terminal 212.

[0038] The base of the booster assembly of this utility model includes a horizontal seat 201 extending in the horizontal direction and a vertical seat 205 fixedly installed on the horizontal seat and extending in the vertical direction.

[0039] A step-up transformer is fixedly installed on the front of the vertical base. This transformer uses a toroidal iron core with a closed magnetic circuit, and primary and secondary coils are wound according to relevant technical parameters (input voltage: AC 6.3V, power: 15VA, output: AC 220V). A positive input port 202 and a negative input port 204 are respectively provided on one side of the vertical base near the step-up transformer, and a positive output port 210 and a negative output port 211 are respectively provided on the other side of the vertical base near the step-up transformer. The positive and negative input terminals of the step-up transformer are electrically connected to the positive and negative input terminals respectively via wires, and the positive and negative output terminals of the step-up transformer are electrically connected to the positive and negative output terminals respectively via wires.

[0040] A pole 206 simulating a utility pole is fixedly installed above the vertical base. A connecting base 213, whose upper surface is perpendicular to both the horizontal and vertical bases, is installed at the top of the pole. A pair of terminals, namely the positive terminal 209 and the negative terminal 212, are fixedly installed on the upper surface of the connecting base. The positive and negative terminals can be electrically connected to the positive output port 210 and the negative output port 211 respectively via wires 207 and 208, and are respectively connected to the starting ends of the pair of power transmission wires.

[0041] In addition, the step-up assembly also includes a connection assembly 6 for electrically connecting the power supply box and the step-up transformer, which can be adopted as follows: Figure 6 The structure shown includes a pair of wires and a pair of conductive clips, namely conductive clips 61, 63, 62, and 64, disposed at both ends of each wire. The conductive clips can be existing technology clips. The conductive clips can be clamped onto corresponding terminals. For example, the pair of conductive clips 61 and 62 at the beginning of the pair of wires can be clamped onto a pair of AC positive and negative connection ports 106 of the power supply box, respectively; the pair of conductive clips 63 and 64 at the ends of the pair of wires can be clamped onto the positive input port 202 and the negative input port 204 of the step-up transformer, respectively. Furthermore, the connection assembly can also electrically connect to required terminals, ports, or components according to experimental needs.

[0042] The ends of a pair of transmission lines are connected to a step-down assembly. The step-down assembly includes a step-down transformer 303 for reducing the output voltage of the pair of transmission lines and a support structure for mounting the step-down transformer thereon. The structure of the support structure is the same as that of the step-up assembly support structure described above; that is, the support structure includes: a base; a vertical pole mounted on the base to simulate a utility pole; and a pair of positive and negative terminals fixedly mounted on the top of the pole for electrically connecting the corresponding ends of the pair of conductors.

[0043] The step-down transformer assembly includes a horizontal base extending horizontally and a vertical base fixedly mounted on the horizontal base and extending vertically. A step-down transformer is fixedly mounted on the front of the vertical base. This transformer uses a toroidal iron core with a closed magnetic circuit and has primary and secondary coils wound according to relevant technical parameters (input voltage: AC 220V, power: 15VA, output: AC 6.3V). A positive input port and a negative input port are respectively located on one side of the vertical base near the step-down transformer, and a positive output port and a negative output port are respectively located on the other side of the vertical base near the step-down transformer. The positive and negative input terminals of the step-down transformer are electrically connected to the positive and negative input ports via wires, respectively. The positive and negative output terminals of the step-down transformer are also electrically connected to the positive and negative output ports via wires, respectively.

[0044] A pole simulating a utility pole is fixedly installed above the vertical base. A connecting seat with its upper surface perpendicular to both the horizontal and vertical bases is installed at the top of the pole. A pair of positive and negative terminals are fixedly installed on the upper surface of the connecting seat. The positive and negative terminals can be electrically connected to the positive and negative output ports respectively through wires, and the positive and negative terminals are respectively connected to the ends of the pair of power transmission wires.

[0045] In addition, it includes a pair of clamping components for detachably fixing the bases of the boosting component and the bucking component to the surface of a support (such as a demonstration table). The clamping component 5 of this invention can be adopted as follows: Figure 4 , Figure 5 The structure shown includes: a frame 53 with a pair of parallel extending arms, each end of which is vertically connected to a vertical arm; a screw 52 threadedly connected to the lower of the two extending arms; and a handle 51 passing through the lower end of the screw for rotating the screw. In use, the horizontal seat and support of the boosting and depressurizing components can be placed between the pair of extending arms of the clamping assembly. By turning the screw, the top of the screw abuts against the lower surface of the support, thereby clamping and fixing the horizontal seat to the upper surface of the support through the upper extending arm and the top of the screw, preventing the boosting or depressurizing components from moving relative to the support.

[0046] The step-up transformer of the step-up component and the step-down transformer of the step-down component have the same structure. The turns ratio of the primary coil to the secondary coil of the step-up transformer is the same as that of the primary coil to the secondary coil of the step-down transformer.

[0047] In addition, the present invention also includes a low-voltage electrical appliance 8 and a high-voltage electrical appliance 7, which are detachably connected to a pair of power transmission lines and movable along the pair of power transmission lines for simulating the user end.

[0048] like Figure 7 , Figure 9 As shown, the low-voltage electrical appliance includes three 6.3-volt light bulbs connected in parallel, fixed to a rectangular plate. This rectangular plate can be made of plexiglass with dimensions of 7 cm x 5.5 cm. The three bulbs are connected in parallel with opposing positive and negative leads. Each lead has a conductive clip installed at its end, which can be attached to a power transmission line or a corresponding terminal block. Existing clamping technology can be used for the conductive clips.

[0049] like Figure 10 As shown, high-voltage electrical appliances can use 220V, 15W light bulbs with lamp holders. Positive and negative leads are led out from the lamp holder. Similarly, a conductive clip is installed at the end of each lead, which can be clamped to the transmission line or the corresponding terminal. Alternatively, as... Figure 8 As shown, a 220-volt, 15-watt light bulb can also be fixed on an acrylic plate, with positive and negative leads led out, and a conductive clip installed at the end of each lead.

[0050] During the experiment, the two conductive clips of the low-voltage or high-voltage electrical appliance can be clamped onto a pair of power transmission lines as needed.

[0051] The following is a brief description of the demonstration process of the long-distance power transmission demonstrator of this utility model.

[0052] I. During low-voltage power transmission:

[0053] 1) A 6-volt AC power supply is provided by a high school student power supply box that simulates a power plant. Two conductive clips leading from a low-voltage electrical appliance, namely a 6.3-volt light bulb, are respectively attached to the positive and negative AC connection ports of the power supply box, and the light bulb lights up normally.

[0054] 2) Apply the 6V AC power provided by the power supply box to the beginning of the transmission line, and connect a 6.3V light bulb to the end of the transmission line. That is, connect the positive and negative AC connection ports of the power supply box to the positive and negative output ports on the right side of the step-up transformer through the connection assembly. Connect the positive and negative output ports to the positive and negative terminals at the beginning of the transmission line, respectively. Connect the positive and negative terminals at the end of the transmission line to the positive and negative input ports on the left side of the step-down transformer, respectively. The two conductive clips leading from the 6.3V light bulb are also clipped onto the positive and negative input ports, respectively. If the light bulb does not light up, it means that the user end is not working properly at this time.

[0055] 3) Building upon the circuit connection in 2), attach the two conductive clips from the 6.3V light bulb to the starting ends of a pair of transmission lines. The 6.3V light bulb will light up normally. Slide the 6.3V light bulb along the transmission lines from the starting end to the end; the light bulb will become dimmer and dimmer, eventually going out when it reaches two-thirds of the way down. Explanation: All electrical energy is lost in the transmission lines.

[0056] Based on the above experiments, it can be concluded that in order to reduce power loss on transmission lines, the current value on the transmission lines must be reduced. According to the transformer principle (input power = output power), a step-up transformer should be added at the beginning of the transmission line, and a step-down transformer should be added at the end of the transmission line.

[0057] Second, during high-voltage power transmission:

[0058] 1) Apply the 6V AC power from the high school student power supply to the input of the step-up transformer, and connect the 6.3V light bulb to the output of the step-down transformer. Specifically, connect the AC positive and negative terminals of the power supply box to the corresponding positive and negative input terminals on the left side of the step-up transformer using the connecting assembly. Connect the positive and negative output terminals on the right side of the step-up transformer to the corresponding positive and negative terminals at the beginning of the power transmission line. Connect the positive and negative terminals at the end of the power transmission line to the corresponding positive and negative input terminals on the left side of the step-down transformer. Clip the two conductive clips from the 6.3V light bulb onto the corresponding positive and negative output terminals on the right side of the step-down transformer. The light bulb should light up normally, indicating that the remote user can work normally.

[0059] 2) When the two conductive clips leading from a 220-volt light bulb are clamped to the beginning of a pair of transmission lines, the bulb lights up normally. Sliding the bulb along the transmission lines shows that its brightness remains almost constant, indicating that there is virtually no energy loss along the transmission lines. Conclusion: High-voltage transmission should be used for long-distance power transmission.

[0060] It should be noted that when representing the power loss on transmission lines, a voltmeter can also be used. The probes are moved along the conductor, and the voltage drop on the transmission line is represented by the change in the pointer (or number).

[0061] As can be seen, this utility model of a long-distance power transmission demonstrator adopts a split structure, which includes a step-up transformer component, a step-down transformer component, a 1-meter-long transmission line between two "power poles", a simulated "power plant" (power supply for high school students) to the left of the step-up transformer, and "user end" (220V and 6V light bulbs) near the step-down transformer. The entire demonstration kit can be unfolded in a line within a 1.5-meter range. The structure is simple, highlights the key points, and is easy to understand. It can fully demonstrate the causes and processes of energy loss on the transmission line in three-dimensional space, overcoming the shortcomings of existing demonstrators that can only perform simple demonstrations on a teaching board. It helps students build a physical model of long-distance high-voltage power transmission, deepens students' understanding, and improves teaching quality.

[0062] Although the present invention has been described in detail above, it is not limited thereto. Those skilled in the art can make modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A long-distance power transmission demonstrator, characterized in that, include: A power supply box used to simulate a power plant; A pair of conductors used to simulate a high-voltage transmission line; A boost converter assembly that is connected to the power supply box and the starting ends of a pair of wires to simulate a boost transformer in order to boost the output voltage of the power supply box. A step-down component that connects to the ends of a pair of conductors to simulate a step-down transformer in order to step down the voltage delivered by the pair of conductors to the output voltage. A low-voltage electrical appliance for simulating a user end, detachably connected to and movable along a pair of wires; A high-voltage electrical appliance that is detachably connected to a pair of conductors and can move along the pair of conductors.

2. The long-distance power transmission demonstrator according to claim 1, characterized in that, The power supply box is for high school students.

3. The long-distance power transmission demonstrator according to claim 1, characterized in that, The boost assembly has a boost transformer for boosting the output voltage of the power supply box.

4. The long-distance power transmission demonstrator according to claim 1, characterized in that, The step-down assembly has a step-down transformer for stepping down the voltage delivered by a pair of wires to the output voltage.

5. The long-distance power transmission demonstrator according to any one of claims 1-4, characterized in that, Both the boost converter and the buck converter include a support structure, which includes: Base; A vertical pole mounted on a base to simulate a utility pole; A pair of terminals fixedly installed on the top of the pole for electrically connecting the corresponding ends of a pair of wires.

6. The long-distance power transmission demonstrator according to claim 5, characterized in that, The step-up transformer of the step-up assembly and the step-down transformer of the step-down assembly have the same structure and the same turns ratio as the primary and secondary coils.

7. The long-distance power transmission demonstrator according to claim 5, characterized in that, The step-up transformer of the step-up assembly and the step-down transformer of the step-down assembly are respectively fixedly installed on their respective bases.

8. The long-distance power transmission demonstrator according to claim 5, characterized in that, It also includes a pair of clamping components for detachably fixing the base of the boosting component and the base of the bucking component to the surface of the support.

9. The long-distance power transmission demonstrator according to claim 7, characterized in that, The boost assembly also includes a connection assembly for electrically connecting the power supply box and the boost transformer.

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