Combined photovoltaic inverter and voltage booster

Abstract

This disclosure presents a combined photovoltaic inverter booster device, comprising: a demagnetizing housing, with a partition inside the demagnetizing housing dividing it into a first compartment and a second compartment; a photovoltaic inverter disposed within the first compartment; a first vent and a second through hole disposed on the first compartment; a low-voltage switchgear, a booster device, and a high-voltage switchgear sequentially connected within the second compartment, wherein the photovoltaic inverter is connected to the low-voltage switchgear via a connecting cable passing through a first waveguide; and a second vent and a third through hole disposed on the second compartment. This disclosure can reduce the electromagnetic interference of the photovoltaic inverter booster device without modifying the photovoltaic inverter, booster device, low-voltage switchgear, and high-voltage switchgear, making it suitable for various applications with strict electromagnetic interference requirements, especially airport flight zones.

Description

Technical Field

[0001] This utility model relates to photovoltaic inverter boost electrical equipment technology, and in particular to a combined photovoltaic inverter boost device. Background Technology

[0002] With the rapid promotion of distributed photovoltaic (PV) power generation and the strong demand for green and low-carbon development across industries, PV inverter booster equipment will be installed more frequently in locations near buildings and populations, making it increasingly necessary to limit the electromagnetic interference (EMI) levels of such equipment. Taking airport flight zones as an example, regulations impose strict requirements on EMI levels at various locations within the flight zone. For instance, the maximum permissible EMI for the 108.1-111.95MHz frequency range of the localizer beacon is 18dB, while the same frequency range requires a 30dB limit for PV inverters, a difference of 12dB. This demonstrates that the EMI levels of typical PV inverters significantly exceed the requirements for airport flight zones.

[0003] Currently, there are no suitable photovoltaic inverter products that can be directly applied to environments with strict electromagnetic interference requirements, such as airport flight zones. Furthermore, the demagnetization modification scheme for photovoltaic inverters is extremely complex, requiring demagnetization design and process optimization in various aspects, including internal component layout, display windows, ventilation openings, casing gaps, cable sockets, and input / output terminals. This involves significant product modifications, high difficulty, and substantial cost increases. Simultaneously, the electromagnetic interference from auxiliary equipment such as the photovoltaic power generation system's booster equipment and high / low voltage switchgear in the high-frequency range also requires relatively complex control measures. Summary of the Invention

[0004] This disclosure provides a combined photovoltaic inverter boost converter to solve the problem of high electromagnetic interference in photovoltaic inverter boost converters.

[0005] This disclosure provides a combined photovoltaic inverter boost converter, comprising:

[0006] A demagnetizing shell is provided inside the demagnetizing shell, and the demagnetizing shell is divided into a first compartment and a second compartment by the partition. The partition is provided with a first through hole connecting the first compartment and the second compartment, and a first waveguide is provided at the first through hole.

[0007] A photovoltaic inverter installed inside the first cabin;

[0008] A first ventilation opening and a second through hole are provided on the first cabin body, wherein a first electromagnetic shielding device is provided at the first ventilation opening and a second waveguide is provided at the second through hole;

[0009] The low-voltage switchgear, the step-up switchgear, and the high-voltage switchgear are arranged sequentially in the second cabin. The photovoltaic inverter is connected to the low-voltage switchgear via a connecting cable, which passes through the first waveguide.

[0010] A second ventilation opening and a third through hole are provided on the second cabin, wherein a second electromagnetic shielding device is provided at the second ventilation opening and a third waveguide is provided at the third through hole.

[0011] In some embodiments of this utility model, it further includes: a first temperature and humidity control device disposed within the first chamber.

[0012] In some embodiments of this utility model, a second temperature and humidity control device is also included, which is disposed within the second chamber.

[0013] In some embodiments of this utility model, the demagnetizing outer shell is a metal shell, and the metal shell includes multiple metal plates.

[0014] In some embodiments of this utility model, it further includes: a conductive pad disposed in the gap between the plurality of metal plates.

[0015] In some embodiments of this utility model, it further includes: an elastic metal finger spring disposed in the gap between the plurality of metal plates.

[0016] In some embodiments of this utility model, the first electromagnetic shielding device includes at least one of a multi-layer shielding metal mesh, a honeycomb array metal plate, and a cutoff waveguide ventilation plate.

[0017] In some embodiments of this utility model, the second electromagnetic shielding device includes at least one of a multi-layer shielding metal mesh, a honeycomb array metal plate, and a cutoff waveguide ventilation plate.

[0018] In some embodiments of this utility model, it further includes:

[0019] A first switch door is installed on the first cabin;

[0020] A second switch door is installed on the second compartment.

[0021] The combined photovoltaic inverter-boost device of this disclosure reduces electromagnetic interference (EMI) through a demagnetizing enclosure without modifying the photovoltaic inverter, boost equipment, low-voltage switchgear, or high-voltage switchgear. Furthermore, since the EMI from the photovoltaic inverter is significantly greater than that from the low-voltage and high-voltage switchgear, separate compartments can be arranged for the photovoltaic inverter, low-voltage switchgear, boost equipment, and high-voltage switchgear. Corresponding measures can be taken to address the different EMI characteristics of each component. This invention can be applied to various applications with stringent EMI requirements, and is particularly suitable for airport flight zones.

[0022] The technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of a combined photovoltaic inverter boost device in one embodiment of the present disclosure;

[0026] Among them, 1-demagnetizing outer shell, 2-first cabin, 3-second cabin, 4-first waveguide, 5-photovoltaic inverter, 6-first vent, 7-second waveguide, 8-low voltage switchgear, 9-boosting equipment, 10-high voltage switchgear, 11-connecting cable, 12-second vent, 13-third waveguide, 14-first temperature and humidity control equipment, 15-second temperature and humidity control equipment, 16-first switch door, 17-second switch door. Detailed Implementation

[0027] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0028] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of this disclosure are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0029] It should also be understood that in the embodiments disclosed herein, "a plurality of" may refer to two or more, and "at least one" may refer to one, two or more.

[0030] It should also be understood that any component, data or structure mentioned in the embodiments of this disclosure can generally be understood as one or more unless expressly defined or given to the contrary in the context.

[0031] Furthermore, the term "and / or" in this disclosure is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this disclosure generally indicates that the preceding and following related objects have an "or" relationship.

[0032] It should also be understood that the description of the various embodiments in this disclosure emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] Figure 1 This is a schematic diagram of the structure of a combined photovoltaic inverter boost converter in one embodiment of this disclosure. Figure 1 As shown, the combined photovoltaic inverter booster device includes a demagnetizing housing 1. A partition is installed inside the demagnetizing housing, dividing the housing 1 into a first compartment 2 and a second compartment 3. The demagnetizing housing 1 can be a metal shell comprising multiple metal plates, preferably made of galvanized steel, which offers good shielding, accommodates both high and low frequencies, has high mechanical strength, is durable, and is relatively inexpensive. The metal shell provides basic shielding against electromagnetic interference. The partition has a first through-hole connecting the first compartment and the second compartment. A first waveguide 4 is installed at the first through-hole. The first waveguide 4 is a hollow metal tube that functions as a high-pass filter, providing efficient energy transmission while offering excellent electromagnetic shielding to prevent electromagnetic interference signals from leaking through the relatively less shielded second compartment 3.

[0037] The combined photovoltaic inverter booster device also includes a photovoltaic inverter 5 installed in the first cabin 2. The photovoltaic inverter 5 can convert the variable DC voltage generated by the photovoltaic solar panel into AC power at the mains frequency, and then feed it back to the commercial power transmission system or supply it to the off-grid power grid.

[0038] The combined photovoltaic inverter booster unit also includes a first vent 6 and a second through hole disposed on the first housing 2. The first vent 6 is equipped with a first electromagnetic shielding device, and the second through hole is equipped with a second waveguide 7, thereby improving the electromagnetic shielding effect at the first vent 6.

[0039] The combined photovoltaic inverter booster unit also includes a low-voltage switchgear 8, a booster device 9, and a high-voltage switchgear 10, which are sequentially connected within the second housing 3. The low-voltage switchgear 8 can be a low-voltage switch cabinet, used for functions such as power distribution, control, protection, and measurement. The booster device 9 is used to increase the voltage from low to high. The high-voltage switchgear 10 can be a high-voltage switch cabinet, used for opening and closing conductive circuits and isolating faulty equipment. The photovoltaic inverter 5 is connected to the low-voltage switchgear 8 via a connecting cable 11, which passes through the first waveguide 4.

[0040] The combined photovoltaic inverter booster unit also includes a second vent 12 and a third through hole disposed on the second cabin. A second electromagnetic shielding device is installed at the second vent 12, and a third waveguide 13 is installed at the third through hole, thereby improving the electromagnetic shielding effect at the second vent 12.

[0041] In some embodiments of this utility model, the combined photovoltaic inverter booster device also includes a first temperature and humidity control device 14 installed inside the first cabin 2, such as an air conditioner that can be used to regulate the temperature and humidity inside the first cabin 2.

[0042] In some embodiments of this utility model, the combined photovoltaic inverter booster device also includes a second temperature and humidity control device 15 installed inside the second cabin 3, such as an air conditioner that can be used to regulate the temperature and humidity inside the second cabin 3.

[0043] In some embodiments of this utility model, the combined photovoltaic inverter booster device also includes a conductive gasket disposed in the gap between the multiple metal plates, which can reduce the gap width (usually less than 5 mm) and increase the overlap length (usually not less than 5 mm), thereby improving the electromagnetic sealing performance of the demagnetizing housing 1.

[0044] In some embodiments of this utility model, the photovoltaic inverter boost device may further include: an elastic metal finger spring disposed in the gap between multiple metal plates, which can reduce the width of the gap between multiple metal plates, thereby improving the electromagnetic sealing performance of the demagnetizing shell 1.

[0045] In some embodiments of this utility model, the first electromagnetic shielding device can be a multi-layer shielding metal mesh with good ventilation and low cost. The first electromagnetic shielding device can also be a honeycomb array metal plate with good electromagnetic shielding and ventilation. The first electromagnetic shielding device can also be a cutoff waveguide ventilation plate with very good electromagnetic shielding and ventilation. The first electromagnetic shielding device can effectively block external electromagnetic interference and prevent signal leakage while ensuring ventilation at the first ventilation opening 6.

[0046] In some embodiments of this utility model, the second electromagnetic shielding device can be a multi-layer shielding metal mesh with good ventilation and low cost. The second electromagnetic shielding device can also be a honeycomb array metal plate with good electromagnetic shielding and ventilation. The second electromagnetic shielding device can also be a cutoff waveguide ventilation plate with very good electromagnetic shielding and ventilation. The second electromagnetic shielding device can effectively block external electromagnetic interference and prevent signal leakage while ensuring ventilation at the second ventilation opening 12.

[0047] In some embodiments of this utility model, the photovoltaic inverter booster device may further include: a first switch door 16 disposed on the first cabin 2, and a second switch door 17 disposed on the second cabin 3, so as to allow personnel to enter and exit the first cabin 2 and the second cabin 3 for normal operation and equipment maintenance.

[0048] The combined photovoltaic inverter-boost device of this disclosure reduces electromagnetic interference (EMI) through a demagnetizing enclosure without modifying the photovoltaic inverter, boost equipment, low-voltage switchgear, or high-voltage switchgear. Furthermore, since the EMI from the photovoltaic inverter is significantly greater than that from the low-voltage and high-voltage switchgear, separate compartments can be arranged for the photovoltaic inverter, low-voltage switchgear, boost equipment, and high-voltage switchgear. Corresponding measures can be taken to address the different EMI characteristics of each component. This invention can be applied to various applications with stringent EMI requirements, and is particularly suitable for airport flight zones.

[0049] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0050] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0051] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0052] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0053] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A combined photovoltaic inverter boost converter, characterized in that, include: A demagnetizing shell is provided inside the demagnetizing shell, and the demagnetizing shell is divided into a first compartment and a second compartment by the partition. The partition is provided with a first through hole connecting the first compartment and the second compartment, and a first waveguide is provided at the first through hole. A photovoltaic inverter installed inside the first cabin; A first ventilation opening and a second through hole are provided on the first cabin body, wherein a first electromagnetic shielding device is provided at the first ventilation opening and a second waveguide is provided at the second through hole; The low-voltage switchgear, the step-up switchgear, and the high-voltage switchgear are arranged sequentially in the second cabin. The photovoltaic inverter is connected to the low-voltage switchgear via a connecting cable, which passes through the first waveguide. A second ventilation opening and a third through hole are provided on the second cabin, wherein a second electromagnetic shielding device is provided at the second ventilation opening and a third waveguide is provided at the third through hole.

2. The combined photovoltaic inverter boost converter according to claim 1, characterized in that, Also includes: A first temperature and humidity control device is installed inside the first cabin.

3. The combined photovoltaic inverter boost converter according to claim 1, characterized in that, Also includes: A second temperature and humidity control device is installed inside the second chamber.

4. The combined photovoltaic inverter boost converter according to any one of claims 1-3, characterized in that, The demagnetizing outer shell is a metal shell, which comprises multiple metal plates.

5. The combined photovoltaic inverter boost converter according to claim 4, characterized in that, Also includes: Conductive pads are disposed in the gaps between the multiple metal plates.

6. The combined photovoltaic inverter boost converter according to claim 4, characterized in that, Also includes: Elastic metal finger springs are installed in the gaps between the multiple metal plates.

7. The combined photovoltaic inverter boost converter according to claim 1, characterized in that, The first electromagnetic shielding device includes at least one of a multi-layer shielding metal mesh, a honeycomb array metal plate, and a cutoff waveguide ventilation plate.

8. The combined photovoltaic inverter boost converter according to claim 1, characterized in that, The second electromagnetic shielding device includes at least one of a multi-layer shielding metal mesh, a honeycomb array metal plate, and a cutoff waveguide ventilation plate.

9. The combined photovoltaic inverter boost converter according to claim 1, characterized in that, Also includes: A first switch door is installed on the first cabin; A second switch door is installed on the second compartment.

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