Simple photovoltaic system simulation device

Abstract

The utility model discloses a simple photovoltaic system simulation device comprising a power button, a touch screen PC computer, a bidirectional electric energy meter connected to a power grid end, a unidirectional electric energy meter connected to the bidirectional electric energy meter, an inverter connected to the unidirectional electric energy meter, and a photovoltaic panel connected to the inverter. The power button is a button for supplying power to the whole device; the touch screen PC is used for displaying a photovoltaic power generation scene on a touch screen in a 3D form, so that a user has relevant and clear understanding of the actual power generation scene, and meanwhile, a typical photovoltaic grid-connected design mode is displayed for students to learn; the bidirectional electric energy meter is used for metering the electric quantity obtained from the power grid in the forward direction and is also used for metering the electric quantity sent to the power grid in the photovoltaic mode in the reverse direction. The one-way electric energy meter is used for metering the electric quantity of photovoltaic power generation; and the inverter adopts a single-phase inverter and is used for simulating conversion of direct current into alternating current. The device is small in occupied area, safe in operation, and capable of simulating a photovoltaic system and simulating some faults to enable trainees to carry out troubleshooting and practical operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power systems, and in particular relates to a simple photovoltaic system simulation device. Background Art

[0002] With the construction of new power systems, power company employees need to learn about the composition, principles, troubleshooting and other related knowledge of photovoltaic systems. Currently, some device products are used for principle teaching.

[0003] There are many kinds of equipment products in power companies, which occupy a large area. Conventional equipment generally takes up a certain space, at least 3-4 square meters. If you want to reserve operating and safety space for trainees, you need about 6 square meters. This is a headache for units with insufficient space. The current actual situation is that many power companies' training rooms and laboratories are fully loaded. There is no extra space to add new equipment before the old equipment is eliminated. Without adding new space, designing a product that can meet the simulation training needs of photovoltaic systems is a problem that the utility model needs to solve. Utility Model Content

[0004] In order to solve the defects and shortcomings in the above-mentioned prior art, the utility model provides a simple photovoltaic system simulation device which occupies a small area, is safe to operate, can simulate a photovoltaic system and can simulate some faults for trainees to conduct practical investigations, thereby allowing trainees of power companies to conduct practical learning on the principles of photovoltaic power generation, demonstrate and introduce photovoltaic components, and conduct investigations and analyses on some faults, while solving the problem that many power companies currently have no installation site for a simple photovoltaic system simulation device.

[0005] The utility model provides the following technical solutions: a simple photovoltaic system simulation device, including a power button, a touch screen PC, a bidirectional electric energy meter connected to the power grid, a unidirectional electric energy meter connected to the bidirectional electric energy meter, an inverter connected to the unidirectional electric energy meter, and a photovoltaic panel connected to the inverter;

[0006] The power button is a button for supplying power to the entire device;

[0007] The touch screen PC is used to display the photovoltaic power generation scene in 3D on the touch screen, so that users can have a clear understanding of the actual power generation scene, and at the same time display the typical photovoltaic grid-connected design mode for students to learn;

[0008] The bidirectional electric energy meter is used to measure the amount of electricity obtained from the power grid, which is counted as the forward direction, and is also used to measure the amount of electricity sent to the power grid by the photovoltaic power plant, which is counted as the reverse direction;

[0009] The one-way electric energy meter is used to measure the amount of electricity generated by photovoltaic power generation;

[0010] The inverter adopts a single-phase inverter to simulate the conversion of direct current into alternating current;

[0011] The photovoltaic panel adopts two real polycrystalline silicon photovoltaic panels, and the two photovoltaic panels are connected in series.

[0012] Preferably, the grid end is connected to a power supply button and a power off button, the power supply button is used to simulate normal power supply of the grid, and the power off button is used to simulate power outage of the grid. A grid power supply indicator light is connected between the grid end and the bidirectional electric energy meter near the grid end, and the grid power supply indicator light is used to indicate whether the grid has power. If the grid has power, the indicator light is on, and if the grid has no power, the indicator light is off.

[0013] Preferably, the bidirectional energy meter is connected with a No. 1 common circuit breaker and a No. 2 leakage protection circuit breaker, and the No. 1 common circuit breaker and the No. 2 leakage protection circuit breaker are used to simulate the distribution box inside the home, and a household load lamp is connected between the bidirectional energy meter and the grid end near the bidirectional energy meter, and the household load lamp is a load lamp with a resistor connected in series at the back, which is used to simulate the actual household electricity consumption.

[0014] Preferably, the one-way electric energy meter is connected to a No. 2 common circuit breaker, a photovoltaic special circuit breaker, a surge protector, a No. 2 leakage protection circuit breaker and a fuse. The No. 2 common circuit breaker, the photovoltaic special circuit breaker, the surge protector, the No. 2 leakage protection circuit breaker and the fuse are used to simulate the composition of the grid-connected box in front of the photovoltaic one-way electric energy meter.

[0015] Preferably, a valid button and a invalid button are connected to the photovoltaic dedicated circuit breaker, the valid button is a photovoltaic dedicated circuit breaker valid button, which sets the photovoltaic dedicated circuit breaker to be valid after clicking; the invalid button is a photovoltaic dedicated circuit breaker invalid button, which sets the photovoltaic dedicated circuit breaker to be invalid after clicking.

[0016] Preferably, a power generation button and a non-power generation button are connected between the inverter and the photovoltaic panel. The power generation button is used to simulate photovoltaic power generation and supply direct current to the inverter for inversion; the non-power generation button is used to simulate no photovoltaic power generation and no direct current is supplied to the inverter.

[0017] Preferably, a light simulator and a voltage measurement terminal are connected to the photovoltaic panel. The light simulator is a high-power light bulb, and the brightness of the light is controlled by a conversion button. The light simulator is used to illuminate the photovoltaic panel to generate a DC voltage. The voltage measurement terminal is a real photovoltaic panel output terminal, which is used to manually measure the output voltage of the photovoltaic panel.

[0018] Preferably, the device is embedded and installed on the wall with a thickness of 24cm-26cm, and the display surface of the device is made of opaque acrylic, and the connecting lines between devices are printed on the acrylic board; the bidirectional electric energy meter and the unidirectional electric energy meter are both single-phase electric energy meters.

[0019] The utility model occupies a small area and has the advantages of safe operation. It can simulate photovoltaic systems and some faults for trainees to conduct practical investigations, thereby allowing trainees of power companies to conduct practical learning on the principles of photovoltaic power generation, demonstrate and introduce photovoltaic components, and conduct investigations and analyses on some faults. At the same time, it solves the problem that many current power companies do not have installation sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural block diagram of the utility model;

[0021] Figure 2 It is the overall electrical circuit diagram of the utility model;

[0022] Figure 3 This is the electrical circuit diagram of the photovoltaic dedicated circuit breaker control part in the utility model. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings, but this does not limit the protection scope of the present invention.

[0024] like Figure 1 As shown, a simple photovoltaic system simulation device can be embedded on the wall with a thickness of about 25 cm. The specific style diagram is as follows, including a power button, a touch-screen PC, a grid picture, a power button, a power-off button, a grid power supply indicator light, a two-way energy meter (single-phase energy meter), a common circuit breaker, a leakage protection circuit breaker (leakage protector), a household load lamp, a one-way energy meter (single-phase energy meter), a common circuit breaker, a photovoltaic-specific circuit breaker, a surge protector, a leakage protection circuit breaker (leakage protector), a fuse, a valid button, a failed button, a single-phase inverter, a power generation button, a non-power generation button, a photovoltaic panel, a light simulator, and a voltage measurement terminal.

[0025] The display surface of the device is made of opaque acrylic, and the connection lines between devices are printed on the acrylic board. The actual wiring and corresponding control circuits are inside the device.

[0026] The functions of each component are as follows:

[0027] 1) Power button:

[0028] Power button for the entire unit.

[0029] 2) Touch screen PC:

[0030] The touch-screen industrial control all-in-one computer displays photovoltaic power generation scenarios in 3D on the touch screen, allowing users to have a clear understanding of the actual power generation scenarios. At the same time, it can display typical photovoltaic grid-connected design models for students to learn.

[0031] 3) Grid images:

[0032] A picture of a power grid iron lattice is shown here, mainly used to indicate that this is the power grid end.

[0033] 4) Power button:

[0034] After pressing, the simulated grid supplies power normally.

[0035] 5) Power off button:

[0036] When pressed, it simulates a power outage on the grid.

[0037] 6) Grid power supply indicator light:

[0038] It is used to indicate whether there is electricity in the power grid. If there is electricity in the power grid, the indicator light will be on; if there is no electricity in the power grid, the indicator light will be off.

[0039] 7) Bidirectional energy meter (single-phase energy meter):

[0040] This is a single-phase energy meter, which can measure the amount of electricity obtained from the grid, which is counted as the forward direction, and can also measure the amount of electricity sent to the grid by the photovoltaic power plant, which is counted as the reverse direction (it measures both normal and reverse directions, so it is called a bidirectional energy meter).

[0041] 8) Ordinary circuit breaker and leakage protection circuit breaker:

[0042] Ordinary circuit breakers and leakage circuit breakers simulate the distribution box inside the home.

[0043] 9) Household load lights:

[0044] The load lamp is connected in series with a resistor to simulate the actual household electricity consumption.

[0045] 10) One-way energy meter (single-phase energy meter):

[0046] This is a single-phase electricity meter, which is used to measure the amount of electricity generated by photovoltaic power.

[0047] 11) Ordinary circuit breakers, photovoltaic circuit breakers, surge protectors, leakage protection circuit breakers, fuses:

[0048] Simulate the composition of the grid-connected box in front of a photovoltaic single-phase electric energy meter.

[0049] 12) Valid buttons:

[0050] This is the photovoltaic dedicated circuit breaker valid button. Click it to set the photovoltaic dedicated circuit breaker valid.

[0051] 13) Disable button:

[0052] This is the PV dedicated circuit breaker failure button. Click it to set the PV dedicated circuit breaker failure. Under normal circumstances, the PV dedicated circuit breaker will detect whether there is power in the grid and act according to the status of the grid. For example, if the grid is powered, it will automatically close the circuit breaker, and if the grid is not powered, it will automatically open the circuit breaker. When the switch fails, it cannot automatically open and close the circuit breaker according to the grid status.

[0053] 14) Single-phase inverter:

[0054] A single-phase inverter simulates the conversion of DC power into AC power.

[0055] 15) Power Generation:

[0056] To simulate photovoltaic power generation, direct current is supplied to a single-phase inverter for inversion.

[0057] 16) No power generation:

[0058] Simulate that the photovoltaic system does not generate electricity and no DC power is supplied to the inverter.

[0059] 17) Photovoltaic panels:

[0060] Two real polycrystalline silicon photovoltaic panels are used, and the two photovoltaic panels are connected in series.

[0061] 18) Lighting Simulator:

[0062] It is a high-power light bulb, and the brightness of the light can be controlled by a conversion button. The light simulator is used to illuminate the photovoltaic panel, allowing the photovoltaic panel to generate a DC voltage.

[0063] 19) Voltage measurement terminal:

[0064] The real photovoltaic panel output terminal is used to manually measure the photovoltaic panel output voltage.

[0065] The electrical circuit of the main circuit is as follows Figure 2 As shown, the actual photovoltaic power generation is converted through the battery and converted into AC power through the inverter.

[0066] Photovoltaic dedicated circuit breaker control part electrical Figure 3 As shown,

[0067] The normal wiring of the photovoltaic dedicated switch is the wiring of the main circuit above. At the same time, the L and N of the access end are also introduced into the device. The contactor is used to control whether it is powered on to simulate the switch failure and the failure to automatically close the switch. (It also counts that even if the main circuit grid is powered off, the power supply to the photovoltaic dedicated circuit breaker is supplied through the device, so that the circuit breaker is not powered off to simulate failure)

[0068] Simulation training demonstration content:

[0069] 1) Photovoltaic power generation 3D scene demonstration;

[0070] 2) Training on typical photovoltaic power generation design;

[0071] 3) Training on the composition of photovoltaic power generation systems;

[0072] 4) Demonstration of photovoltaic power generation principle;

[0073] 5) Demonstration of the relationship between light intensity and photovoltaic power generation;

[0074] 6) Demonstration of failure of photovoltaic dedicated switch.

[0075] Simulation training demonstration process:

[0076] 1) Press the "Power Button" to power the device.

[0077] 2) The "touch screen PC" automatically turns on and can display and operate the 3D scene.

[0078] 3) By default, the photovoltaic power plant is not generating electricity, the power grid is supplying electricity normally, and the household is using electricity normally.

[0079] 4) Press "Generate Power" to supply the inverter with power through the battery for inversion power generation. The voltage, current and real-time power can be seen on the one-way energy meter.

[0080] 5) Press “No Power Generation” to stop photovoltaic power generation.

[0081] 6) Press “Power Off” to shut down the power grid, the photovoltaic dedicated switch will automatically shut down, and the household load lights will go out.

[0082] 7) Press "Power" to return to normal.

[0083] 8) Press “Valid” to demonstrate in combination with the grid power supply status.

[0084] 9) Press “Invalid” to demonstrate in combination with the grid power supply status.

[0085] 10) The above button states can be switched according to the actual training demonstration situation.

[0086] 11) The light simulator can be controlled to emit light, and the light intensity can be adjusted by the knob.

[0087] 12) Use a multimeter to measure the output voltage of the photovoltaic panel, and demonstrate the different output voltage values ​​under different light intensities.

Claims

1. A simple photovoltaic system simulation device, characterized in that: It includes a power button, a touch screen PC, a bidirectional electric energy meter connected to the power grid, a unidirectional electric energy meter connected to the bidirectional electric energy meter, an inverter connected to the unidirectional electric energy meter, and a photovoltaic panel connected to the inverter; The power button is a button for supplying power to the entire device; The touch screen PC is used to display the photovoltaic power generation scene in 3D on the touch screen, so that users can have a clear understanding of the actual power generation scene, and at the same time display the typical photovoltaic grid-connected design mode for students to learn; The bidirectional electric energy meter is used to measure the amount of electricity obtained from the power grid, which is counted as the forward direction, and is also used to measure the amount of electricity sent to the power grid by the photovoltaic power plant, which is counted as the reverse direction; The one-way electric energy meter is used to measure the amount of electricity generated by photovoltaic power generation; The inverter adopts a single-phase inverter to simulate the conversion of direct current into alternating current; The photovoltaic panel adopts two real polycrystalline silicon photovoltaic panels, and the two photovoltaic panels are connected in series.

2. A simplified photovoltaic system simulation device according to claim 1, characterized in that: The grid end is connected to a power supply button and a power off button. The power supply button is used to simulate normal power supply of the grid, and the power off button is used to simulate power outage of the grid. A grid power supply indicator light is connected between the grid end and the bidirectional electric energy meter near the grid end. The grid power supply indicator light is used to indicate whether the grid has power. If the grid has power, the indicator light is on, and if the grid has no power, the indicator light is off.

3. A simplified photovoltaic system simulation device according to claim 1, characterized in that: The bidirectional energy meter is connected with a No. 1 common circuit breaker and a No. 2 leakage protection circuit breaker, and the No. 1 common circuit breaker and the No. 2 leakage protection circuit breaker are used to simulate the distribution box inside the home. A household load lamp is connected between the bidirectional energy meter and the power grid end near the bidirectional energy meter. The household load lamp is a load lamp with a resistor connected in series at the back, and is used to simulate the actual household electricity consumption.

4. A simplified photovoltaic system simulation device according to claim 1, characterized in that: The one-way electric energy meter is connected to a No. 2 common circuit breaker, a photovoltaic special circuit breaker, a surge protector, a No. 2 leakage protection circuit breaker and a fuse. The No. 2 common circuit breaker, the photovoltaic special circuit breaker, the surge protector, the No. 2 leakage protection circuit breaker and the fuse are used to simulate the composition of the grid-connected box in front of the photovoltaic one-way electric energy meter.

5. A simplified photovoltaic system simulation device according to claim 4, characterized in that: The photovoltaic dedicated circuit breaker is connected to a valid button and a disabled button. The valid button is a valid button for the photovoltaic dedicated circuit breaker. When clicked, the photovoltaic dedicated circuit breaker is set to be valid; the disabled button is a disabled button for the photovoltaic dedicated circuit breaker. When clicked, the photovoltaic dedicated circuit breaker is set to be disabled.

6. A simplified photovoltaic system simulation device according to claim 1, characterized in that: A power generation button and a non-power generation button are connected between the inverter and the photovoltaic panel. The power generation button is used to simulate photovoltaic power generation and supply direct current to the inverter for inversion; the non-power generation button is used to simulate no photovoltaic power generation and no direct current is supplied to the inverter.

7. The simplified photovoltaic system simulation device according to claim 1, characterized in that: The photovoltaic panel is connected to a light simulator and a voltage measurement terminal. The light simulator is a high-power light bulb. The brightness of the light is controlled by a conversion button. The light simulator is used to illuminate the photovoltaic panel to generate a DC voltage. The voltage measurement terminal is a real photovoltaic panel output terminal, which is used to manually measure the output voltage of the photovoltaic panel.

8. The simplified photovoltaic system simulation device according to claim 1, characterized in that: The device is embedded and installed on the wall, with a thickness of 24cm-26cm, and the display surface of the device is made of opaque acrylic. The connecting lines between devices are printed on the acrylic board; the bidirectional electric energy meter and the unidirectional electric energy meter are both single-phase electric energy meters.

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