Inverter system and photovoltaic power generation system

Abstract

The utility model discloses an inverter system and a photovoltaic power generation system, and belongs to the technical field of photovoltaic power generation. The inversion system comprises an integrated platform, a power transformation equipment group, a power cabinet and a black-start control box. The integrated platform is installed on the base, and the power transformation equipment group, the power cabinet and the black-start control box are all installed on the integrated platform and are electrically connected in sequence. Through the integrated black-start control box, under the condition that a power grid breaks down or a power station is not connected to a grid, an inverter can be quickly converted from a current source mode to a voltage source mode, stable alternating voltage is reestablished, stable voltage support is provided for other equipment or subsystems in the power station, power balance and stable operation in the power station are ensured, and the power supply efficiency is improved. Through the structural layout, the off-grid operation function of the photovoltaic converter is realized without an external power supply, the structural layout is simple, the safe operation of the inverter system can be ensured, and the operation cost is saved.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic power generation technology, and in particular relates to an inverter system and a photovoltaic power generation system. Background Art

[0002] When the power grid is out of power due to some kind of fault, the traditional current source converter cannot be connected to the grid due to the power grid outage, or the conditions for grid connection are not met in the initial stage of power station construction, but the on-site equipment needs to be debugged and repaired. When the sub-array inverter is connected to the grid and debugged with the high-voltage side of the grid disconnected, an external diesel generator or other power supply equipment is required as a voltage source to provide the grid. However, the external power supply equipment may have faults or unstable supply problems, which will cause unnecessary interference to the debugging and maintenance of the equipment. There is room for improvement. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes an inverter system and a photovoltaic power generation system, which can realize off-grid operation of photovoltaic inverters without an external power supply, provide for on-site equipment debugging and maintenance, and improve the efficiency and progress of on-site debugging and maintenance.

[0004] In a first aspect, the present application provides an inverter system, which is applied to a photovoltaic power generation system, comprising:

[0005] Integrated platform;

[0006] A power transformation equipment group, wherein the power transformation equipment group is installed on the integrated platform;

[0007] A power cabinet, which is installed on the integrated platform and is electrically connected to the power transformation equipment group;

[0008] A black start control box is electrically connected to the power cabinet, and a vertical projection of the black start control box on the upper surface of the base is located within the upper surface of the base.

[0009] The inverter in the substation equipment group operates in the current source mode under normal circumstances, and performs power regulation and electric energy conversion according to the specific needs of the power station. However, in the event of a power grid failure or the power station is not connected to the grid, in order to re-establish a stable AC voltage, the inverter in the substation equipment group is electrically connected to the photovoltaic subarray in the photovoltaic power generation system, and the black start control box is electrically connected to the inverter through the power cabinet, and is used to output an instruction to the inverter for switching the current source mode to the voltage source mode when a target input signal is received, thereby ensuring stable operation and efficient output of the photovoltaic power generation system.

[0010] According to one embodiment of the present application, the black start control box includes:

[0011] A box body with an open end, wherein a waterproof terminal is led out from the bottom wall of the box body;

[0012] A door body is installed at the open end of the box body in an openable and closable manner, and a lock is provided between the door body and the box body.

[0013] The various components of the black start control box work together to ensure that the system can operate stably in a harsh environment, achieve precise control of the engine, and improve starting efficiency and reliability.

[0014] According to one embodiment of the present application, the black start control box is suitable for being installed on a base where the integrated platform is located.

[0015] The design of the black start control box installed on the base where the integrated platform is located has the characteristics of stability, fixity, protection, ease of maintenance and adaptability, which can ensure the stable operation of the black start control box in complex environments and provide reliable control guarantee for the black start process of the power system.

[0016] According to one embodiment of the present application, the black start control box and the power cabinet are respectively located on both sides of the first maintenance channel of the base in the width direction.

[0017] The black start control box and the power cabinet are respectively placed on both sides of the width direction of the first maintenance channel, which can effectively utilize the space, make the overall layout more compact, save floor space, and maintenance personnel can more conveniently approach and operate the black start control box and the power cabinet when performing daily inspections, repairs or replacement of parts, thereby improving maintenance efficiency.

[0018] According to one embodiment of the present application, the door body of the black start control box and the cabinet door of the power cabinet are both configured to open toward the first maintenance passage, and the distance between the door body and the cabinet door is greater than the sum of the widths of the door body and the cabinet door;

[0019] and / or,

[0020] The black start control box is installed in the installation area along the length direction of the first maintenance passage, the midpoint of the installation area is directly opposite to the wiring point of the power cabinet, and the distance from both ends of the installation area along the length direction of the first maintenance passage to the midpoint is the width of the door body;

[0021] and / or,

[0022] The distance from the bottom of the black start control box to the upper surface of the base is within the target interval.

[0023] According to the maximum door opening maintenance space of the power cabinet and the black start control box and the bending space requirement for wiring, the black start control box and the power cabinet are respectively installed on both sides of the first maintenance channel of the base, and the door body of the black start control box and the cabinet door of the power cabinet are configured to open toward the first maintenance channel, and the distance between the door body and the cabinet door is greater than the sum of the widths of the door body and the cabinet door.

[0024] The black start control box is installed in the installation area along the length direction of the first maintenance channel, the midpoint of the installation area is opposite to the wiring point of the power cabinet, and the distance from both ends of the installation area along the length direction of the first maintenance channel to the midpoint is the width of the door body.

[0025] According to one embodiment of the present application, the inverter system further includes:

[0026] A column, wherein the column is mounted on the base;

[0027] A crossbeam is installed on the column, and the black start control box is installed on the crossbeam.

[0028] The black start control box is stably fixed on the base through the support of the columns and the beams, and ensures normal operation and stable control in the photovoltaic power generation system, which not only improves the reliability of the system, but also facilitates future maintenance and management.

[0029] According to one embodiment of the present application, the black start control box is installed on the integrated platform.

[0030] The black start control box is installed on the integrated platform to simplify wiring, reduce intermediate links, improve the response speed and reliability of the system, optimize the spatial layout, improve maintenance convenience, and enhance the reliability and flexibility of the system.

[0031] According to one embodiment of the present application, the black start control box is installed on a first side surface of the power cabinet, the first side surface is adjacent to the cabinet door of the power cabinet and faces the side surface of the second maintenance channel of the base, and the door body of the black start control box and the cabinet door of the power cabinet are configured to open to maintenance channels in different directions of the base.

[0032] The black start control box is installed on the first side of the power cabinet and is tightly integrated with the power cabinet, which can reduce the distance of cable connection and signal transmission and save additional installation space. The door body facing the black start control box and the cabinet door of the power cabinet are configured to open maintenance channels in different directions of the base, so that the door body and the cabinet door do not interfere with each other, ensuring the safety of the equipment during normal operation and improving the safety and efficiency of maintenance work.

[0033] According to one embodiment of the present application, the projection of the black start control box on the first side surface is located inside the first side surface;

[0034] and / or,

[0035] The distance from the bottom of the black start control box to the upper surface of the base is within the target interval.

[0036] The projection of the black start control box on the first side is located inside the first side, which can ensure that the black start control box is completely fitted on the side of the power cabinet without exceeding the boundary of the side, which not only makes the overall appearance more neat and beautiful, but also enhances the stability of the structure, reduces potential failures caused by looseness or shaking, and improves the reliability of the equipment.

[0037] According to one embodiment of the present application, the inverter system further includes the mounting frame, and the mounting frame includes:

[0038] A base, the base is mounted on the integrated platform, and the back of the base is connected to the power cabinet;

[0039] A vertical support beam, the vertical support beam being mounted on the front side of the base;

[0040] A diagonal brace connected between the base and the vertical support beam;

[0041] A mounting plate, the mounting plate being mounted on the front side of the vertical support beam, and the black start control box being mounted on the front side of the mounting plate;

[0042] A top connecting piece is installed on the back of the mounting plate and is connected to the power cabinet.

[0043] The design of the mounting frame can provide a stable and reliable installation environment for the black start control box. The stability and load-bearing capacity of the mounting frame are ensured through reasonable structural design and connection methods between various components, thereby ensuring that the black start control box can work normally at critical moments.

[0044] In a second aspect, the present application provides a photovoltaic power generation system, including: a photovoltaic sub-array.

[0045] According to one embodiment of the present application, the power transformation equipment group is used to be electrically connected to the photovoltaic sub-array.

[0046] The photovoltaic sub-array is electrically connected to the inverter via cables and switch devices, and the electric energy generated by each photovoltaic sub-array is transmitted to the power transformation equipment group via cables for transformation and conversion.

[0047] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0049] Figure 1 It is one of the structural schematic diagrams of the inverter system provided in the embodiment of the present application;

[0050] Figure 2 This is one of the structural schematic diagrams of the black start control box of the inverter system provided in the embodiment of the present application;

[0051] Figure 3 This is the second structural schematic diagram of the black start control box of the inverter system provided in the embodiment of the present application;

[0052] Figure 4 This is the third structural schematic diagram of the black start control box of the inverter system provided in the embodiment of the present application;

[0053] Figure 5 This is one of the position layout diagrams of the black start control box of the inverter system provided in the embodiment of the present application;

[0054] Figure 6 yes Figure 6 One of the local structure diagrams at A in the middle;

[0055] Figure 7 yes Figure 6 The second schematic diagram of the local structure at A in the middle;

[0056] Figure 8 This is the second location layout diagram of the black start control box of the inverter system provided in the embodiment of the present application;

[0057] Fig. 9 This is the second structural schematic diagram of the inverter system provided in the embodiment of the present application;

[0058] Fig.10 It is a partial layout diagram of a power cabinet and a black start control box of an inverter system provided in an embodiment of the present application;

[0059] Fig.11 It is one of the structural schematic diagrams of the mounting frame of the inverter system provided in the embodiment of the present application;

[0060] Fig.12 This is the second structural schematic diagram of the mounting frame of the inverter system provided in the embodiment of the present application.

[0061] Reference numerals:

[0062] Inverter system 10;

[0063] Base 110;

[0064] Integration platform 120;

[0065] A power transformation equipment group 130, an inverter 131, and a transformer 132;

[0066] Power cabinet 140;

[0067] Black start control box 150, box body 151, waterproof terminal 152, door body 153;

[0068] A first maintenance passage 161, a second maintenance passage 162;

[0069] Column 170;

[0070] Beam 180;

[0071] Mounting frame 190, base 191, vertical support beam 192, diagonal brace 193, mounting plate 194, top connector 195;

[0072] Photovoltaic power generation system 20, photovoltaic sub-array 21;

[0073] Length direction X, width direction Y;

[0074] The distance S between the door body and the cabinet door, the door body width W1, the cabinet door width W2, the gap W3, and the height H that can be operated by hand. DETAILED DESCRIPTION

[0075] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0076] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes an inverter system and a photovoltaic power generation system, which can realize off-grid operation of photovoltaic inverters without an external power supply, provide for on-site equipment debugging and maintenance, and improve the efficiency and progress of on-site debugging and maintenance.

[0077] Reference below Figure 1-Figure 11 An inverter system 10 according to an embodiment of the present application is described.

[0078] like Figure 1 As shown, the inverter system 10 includes: an integrated platform 120 , a power transformation equipment group 130 , a power cabinet 140 and a black start control box 150 .

[0079] The integrated platform 120 is installed on the base 110 .

[0080] In the technical solution of the present application, the base 110 can carry and support other equipment of the inverter system 10, such as the integrated platform 120, to ensure its stability and safety. The base 110 is made of a solid concrete or steel structure and can withstand the weight of the upper equipment and the influence of various environmental factors, such as wind or earthquakes.

[0081] The integrated platform 120 is a frame structure and is covered with an upper plate, for example, a metal frame can be covered with an upper plate. Various substation, control and protection equipment are independently installed in different areas of the frame structure, which can reduce the mutual influence between the equipment and can also be adjusted and expanded according to subsequent needs, such as modifying the frame to add new equipment or functions.

[0082] The frame structure provides strong support and stability, ensuring that the integrated platform 120 can maintain its shape and function under various environmental conditions. The upper plate provides protection for the integrated platform 120 to prevent the intrusion of dust, moisture and other environmental factors, helping to keep the equipment inside the platform clean and safe and extend its service life.

[0083] The design of the metal frame covering the upper plate can also optimize the heat dissipation performance of the electronic devices inside the integrated platform 120, ensuring that the devices do not overheat when operating efficiently.

[0084] It can be understood that the integrated platform 120 is the main area for installing equipment in the inverter system 10, and is used to integrate and install various substation, control and protection equipment. The integrated platform 120 can be installed on the base 110 by connecting methods such as bolts, welding and slots, providing a flat and stable installation surface for the substation equipment group 130, so that the substation equipment group 130 can be laid out and installed according to the design requirements, and can include auxiliary facilities such as cable trenches and grounding systems to ensure electrical connection and grounding protection between equipment.

[0085] The power transformation equipment group 130 is installed on the integrated platform 120 .

[0086] In the technical solution of the present application, the substation equipment group 130 is the core part of the inverter system 10, which mainly includes an inverter 131 and a transformer 132, wherein the inverter 131 is responsible for the substation of the photovoltaic power generation system 20, mainly the switching of direct current and alternating current, and the transformer 132 is used to increase the voltage. The substation equipment group 130 can convert the direct current generated by the photovoltaic panels into alternating current, and increase the voltage to a level matching the grid voltage so as to connect to the grid and transmit power.

[0087] The inverter 131 is electrically connected to the photovoltaic sub-array 21 in the photovoltaic power generation system 20, and the black start control box 150 is electrically connected to the inverter 131 through the power cabinet 140. The black start control box 150 is used to output an instruction to the inverter 131 to switch the current source mode to the voltage source mode when receiving the target input signal.

[0088] The black start control box 150 establishes an electrical connection with the inverter 131 through the power cabinet 140. This connection relationship can not only ensure the accurate transmission of the control signal, but also realize the centralized control of the substation equipment group 130. When receiving a specific target input signal, the black start control box 150 can respond quickly and output instructions to the inverter 131 to switch the current source mode to the voltage source mode.

[0089] It can be understood that the inverter 131 in the substation equipment group 130 realizes the transmission and conversion of electric energy to the photovoltaic sub-array 21 through the electrical connection with the black start control box 150 and the power cabinet 140, and the black start control box 150 receives the target input signal and outputs instructions to the inverter 131 to switch it to the voltage source mode, thereby ensuring the stable operation and efficient output of the entire photovoltaic power generation system 20. The transformer 132 in the substation equipment group 130 can increase the converted AC voltage to meet the voltage requirements of the power grid.

[0090] The power cabinet 140 is installed on the integrated platform 120 and is electrically connected to the power transformation equipment group 130 .

[0091] In the technical solution of the present application, the power cabinet 140 is mainly used to protect the safe operation of the system, ensure the safe coordination between the inverter 131 and the power grid, and improve the system reliability. The power cabinet 140 has the characteristics of high protection level, long service life, and easy installation and operation. Its functions include isolation protection, overload protection and short circuit protection.

[0092] The power cabinet 140 is used for communication and monitoring the working status of the inverter 131 and the transformer 132, as well as for external power supply. It can also detect, monitor and protect safety parameters such as current, voltage and short circuit. It is mainly composed of a cabinet, electrical components, instruments, control systems and cable connections. The cabinet is made of high-quality materials and has good dust-proof, moisture-proof, shock-proof and corrosion-resistant properties. The electrical components include circuit breakers, contactors, thermal relays and capacitors, etc., which have good electrical performance and reliability.

[0093] The black start control box 150 is electrically connected to the power cabinet 140 , and a vertical projection of the black start control box 150 on the upper surface of the base 110 where the integrated platform 120 is located is located within the upper surface of the base 110 .

[0094] The vertical projection of the black start control box 150 falls completely within the upper surface of the base 110 and does not exceed the boundary of the base 110, which can ensure that the black start control box 150 is firmly installed on the base 110 and will not shift or fall off due to external force. At the same time, the black start control box 150 is more convenient to repair or replace.

[0095] In the technical solution of this application, Figure 1 As shown, the black start control box 150 is an important device in the power system for quickly restoring power supply after a power grid fault. When the power station is not connected to the grid or when a grid-side fault converter is detected to be off-grid after being connected to the grid, the black start control box 150 starts to change the mode of the inverter 131 from a current source to a voltage source, establishes an AC voltage, and provides voltage support to the inverter 131 in other current source modes. Without an external power supply, the photovoltaic converter can also be operated off-grid for on-site equipment debugging and maintenance, thereby improving the efficiency and progress of on-site debugging and maintenance.

[0096] According to the inverter system 10 provided in the embodiment of the present application, a black start control box 150 is integrated. In the event of a power grid failure or a power station not being connected to the grid, the inverter 131 can be quickly converted from a current source mode to a voltage source mode, and a stable AC voltage can be re-established to provide a stable voltage reference for other equipment or subsystems inside the power station, thereby ensuring power balance and stable operation inside the power station. At the same time, the projection of the black start control box 150 along the vertical direction on the upper surface of the base 110 where the integrated platform 120 is located is located within the upper surface of the base 110, which can improve the efficiency and progress of on-site debugging and maintenance.

[0097] In some embodiments, Figure 2-Figure 4 As shown, the black start control box 150 includes: a box body 151, a waterproof terminal 152 (IPX5 terminal) and a door body 153.

[0098] A box body 151 having an open end, a waterproof terminal 152 extending from the bottom wall of the box body 151;

[0099] The door body 153 is installed at the open end of the box body 151 in an openable and closable manner, and a lock is provided between the door body 153 and the box body 151 .

[0100] The box body 151 serves as the outer shell of the black start control box 150 and plays the role of protecting the internal modules and circuits. It is usually made of durable materials, such as plastic or metal, and can prevent the external environment from interfering with the black start control box 150. The heat dissipation performance is also taken into consideration to ensure that the internal modules will not be damaged due to overheating during operation.

[0101] The waterproof terminal 152 (IPX5 terminal) is used to connect external cables or lines to ensure that the electrical connection will not be short-circuited or damaged due to moisture intrusion in a humid or rainy environment. The waterproof terminal 152 has an excellent waterproof structure inside, which can effectively isolate external moisture and impurities such as dust, maintain the stability and reliability of the electrical connection in harsh environments, and reduce the risk of failure caused by the intrusion of impurities such as moisture and dust.

[0102] The door body 153 serves as the opening part of the black start control box 150 and is usually designed to be openable and closable. It is used to protect the internal modules of the black start control box 150 from direct contact and damage from the outside, while facilitating the maintenance, inspection and replacement of internal components. The door body 153 is usually tightly matched with the box body 151 and ensures the sealing when closed through a locking mechanism to prevent external environmental factors from affecting the internal components.

[0103] At the same time, in order to ensure the safe electrical connection of the box 151, a grounding gasket is designed at the bottom of the box 151. The material can be SUS316 or SUS304 to meet the anti-corrosion requirements of the on-site environment.

[0104] It can be understood that, through the coordinated operation of the various components of the black start control box 150, it is possible to ensure that the system operates stably in a harsh environment and improve the start-up efficiency and reliability.

[0105] The black start control box 150 may be arranged in a variety of ways, such as being arranged on the base 110 where the integrated platform 120 is located, or being arranged on the integrated platform 120 .

[0106] In some embodiments, Figure 5 As shown, the black start control box 150 can be installed on the base 110 where the integrated platform 120 is located.

[0107] In this embodiment, the black start control box 150 is separately arranged on the base 110. The advantage of this solution is that the original integrated platform 120 is not modified, and the consistency of the appearance of the same power station product is maintained.

[0108] Installation on the base 110 can also ensure the stability of the black start control box 150 and prevent displacement or damage caused by vibration, shaking or external impact. The base 110 provides firm support and fixation for the black start control box 150, and can ensure that the black start control box 150 will not accidentally fall off or move through other connection methods such as bolts, welding or snaps. At the same time, the base 110 also has certain protective functions, such as raising the black start control box 150 to avoid direct contact with moisture, accumulated water or debris on the ground, improving the waterproof and dustproof performance, as well as ventilation and heat dissipation, thereby increasing the service life of the black start control box 150.

[0109] It can be understood that the design of the black start control box 150 installed on the base 110 has the characteristics of stability, protection and easy maintenance. Through reasonable design and implementation of the base 110, it can ensure that the black start control box 150 can operate stably in complex environments and provide reliable control guarantee for the black start process of the power system.

[0110] In some embodiments, Figure 5-Figure 7 As shown, the black start control box 150 and the power cabinet 140 are respectively located on both sides of the first maintenance channel 161 of the base 110 in the width direction Y.

[0111] In the technical solution of the present application, the black start control box 150 and the power cabinet 140 are respectively placed on both sides of the width direction Y of the first maintenance channel 161, which can effectively utilize the space, make the overall layout more compact, save floor space, and maintenance personnel can more conveniently approach and operate the black start control box 150 and the power cabinet 140 when performing daily inspections, repairs or replacement of parts, thereby improving maintenance efficiency.

[0112] The base 110 can be designed to have a structure with sufficient width and length to accommodate the black start control box 150 and the power cabinet 140 and ensure a safe distance between them. The wiring of cables and pipelines should be reasonably planned inside or below the base 110 to ensure that the electrical connection between the black start control box 150 and the power cabinet 140 is safe and reliable. The wiring should be neat and beautiful and comply with relevant electrical safety specifications.

[0113] Clear markings and signboards are provided on both sides of the first maintenance passage 161 to facilitate personnel positioning and operation, while avoiding the accumulation of debris or obstacles to ensure that the passage is unobstructed.

[0114] It can be understood that the layout design in which the black start control box 150 and the power cabinet 140 are respectively located on both sides of the first maintenance channel 161 of the base 110 in the width direction Y not only optimizes space utilization, but also improves maintenance convenience and safety, and can also ensure the effectiveness and reliability of the layout in practical applications.

[0115] In some embodiments, Figure 5-Figure 8 As shown, the door body 153 of the black start control box 150 and the cabinet door of the power cabinet 140 are configured to open toward the first maintenance channel 161, and the distance between the door body 153 and the cabinet door is greater than the sum of the widths of the door body 153 and the cabinet door;

[0116] The black start control box 150 is installed in the installation area along the length direction X of the first maintenance channel 161, the midpoint of the installation area is directly opposite to the wiring point of the power cabinet 140, and the distance from both ends of the installation area to the midpoint along the length direction of the first maintenance channel 161 is the width of the door body 153;

[0117] The distance from the bottom of the black start control box 150 to the upper surface of the base 110 is within the target range.

[0118] In the technical solution of the present application, the door body 153 of the black start control box 150 and the cabinet door of the power cabinet 140 can be opened toward the first maintenance channel 161, so that the maintenance personnel can directly face and operate the black start control box 150 and the power cabinet 140 after entering the channel without detouring or adjusting the position, thereby improving the efficiency of the maintenance operation, and the distance S between the door body 153 and the cabinet door is equal to the door body 153 width W1 + cabinet door width W2 + gap W3 between the two, ensuring the maximum door opening maintenance space of the power cabinet 140 and the black start control box 150, when one of the door body 153 or the cabinet door is opened, it will not collide or interfere with the other, avoiding accidental damage or safety hazards that may occur during operation, and at the same time, the opening method of the door body 153 and the cabinet door should be designed to be easy to operate, such as using a handle or push-pull design.

[0119] The black start control box 150 can be installed in the installation area along the length direction X of the first maintenance channel 161. The midpoint of the installation area is opposite to the wiring point of the power cabinet 140. When the distance from both ends of the installation area to the midpoint along the length direction X of the first maintenance channel 161 is the width W1 of the door body 153, it can ensure that the wiring path of the black start control box 150 and the power cabinet 140 is the shortest in the plane where the wiring panel of the power cabinet 140 is located and is the distance S between the door body and the cabinet door. At the same time, it also reduces unnecessary movement and turning for maintenance personnel when operating the black start control box 150, thereby improving the convenience of operation.

[0120] According to the specific conditions of the installation area, a suitable fixing method can be selected, such as bolt fixing, welding fixing, etc. The fixing method can make the black start control box 150 stable and reliable, not easy to shake or shift, and maintain sufficient maintenance channel space around the installation area to ensure that maintenance personnel can pass and operate freely.

[0121] The distance L from the bottom of the black start control box 150 to the upper surface of the base 110 can be greater than the minimum requirement h for the wiring bending height and less than the height H that can be operated by human hands, ensuring that the cable or wire will not be damaged due to excessive bending when connected to the black start control box 150.

[0122] The minimum bending height requirement h for wiring is not a fixed value, but is determined according to the specific cable type, specification and application scenario. Different types of cables, such as copper tube cables, flame-retardant rubber sheathed cables, etc., and different specifications, such as the outer diameter of the cable, the number of cores, etc., will affect the bending performance of the wiring. Generally speaking, the larger the outer diameter of the cable, the larger the allowable bending radius. The minimum bending height requirement h for wiring is also related to the use environment of the cable. In humid places or places with corrosive steam or gas, a larger bending radius may be required to ensure the safety and reliability of the cable.

[0123] The height H operable by hand may be designed based on ergonomics to prevent the black start control box 150 from being too high or too low, causing inconvenience in operation, increasing the difficulty of operation, and affecting the comfort and convenience of the operator.

[0124] It is understandable that through reasonable installation area planning, fixing method selection, door body 153 and cabinet door design and distance planning and other measures, the convenience of maintenance operations can be guaranteed, space utilization can be optimized, and the effectiveness and reliability of the layout design in actual application can be ensured.

[0125] In some embodiments, Figure 5 and Figure 8 As shown, the inverter system 10 further includes: a column 170 and a beam 180 .

[0126] The column 170 is mounted on the base 110;

[0127] The crossbeam 180 is mounted on the column 170 , and the black start control box 150 is mounted on the crossbeam 180 .

[0128] In the technical solution of the present application, the column 170 is on the foundation of the integrated platform 120 , the mounting beam 180 is fixed on the column 170 , and the black start control box 150 is fixed on the mounting beam 180 .

[0129] As a load-bearing component, the column 170 can be fixed on the base 110 by casting, providing a solid support for the entire structure and ensuring the stability and reliability of the beam 180. The beam 180 can be installed on the column 170 by welding or snapping to form a horizontal support surface, providing a basis for the installation of the black start control box 150. The black start control box 150 can be installed on the beam 180 by bolts, which not only ensures the stability of the black start control box 150, but also facilitates future maintenance and operation. The entire installation process needs to ensure that the connection between the various components is firm and reliable to prevent loosening or falling off during operation. At the same time, safety must be paid attention to during the installation process to avoid accidental injuries.

[0130] It can be understood that, through the support of the columns 170 and the beams 180, the black start control box 150 can be stably fixed on the base 110 and ensure the normal operation and stable control in the photovoltaic power generation system 20, which not only improves the reliability of the system, but also facilitates future maintenance and management.

[0131] In some embodiments, Fig. 9 As shown, the black start control box 150 is installed on the integrated platform 120 .

[0132] In this embodiment, the black start control box 150 is arranged on the integrated platform 120. The advantage of this solution is that it does not require on-site customer wiring and debugging, which can save the cost and time of on-site debugging.

[0133] The black start control box 150 is installed on the integrated platform 120 to simplify wiring, reduce intermediate links, and improve the response speed and reliability of the system. The integrated platform 120 is manufactured using high-quality materials and processes, has good stability and durability, and can provide a good working environment for the black start control box 150, which is conducive to its stable and efficient operation.

[0134] The integrated platform 120 enables multiple devices and components to be compactly arranged together to save space, and the black start control box 150 is directly installed on the integrated platform 120, further saving space resources. In addition, all devices and components are concentrated on the integrated platform 120, so maintenance personnel can more conveniently perform inspections, repairs and replacements, reducing maintenance difficulty and time costs and improving work efficiency.

[0135] It can be understood that the design of installing the black start control box 150 on the integrated platform 120 not only optimizes the spatial layout and improves the maintenance convenience, but also enhances the reliability and flexibility of the system, which helps to improve the performance and efficiency of the entire photovoltaic power generation system 20.

[0136] In some embodiments, Fig. 9 and Fig.10 As shown, the black start control box 150 is installed on the first side of the power cabinet 140, and the first side is the side of the second maintenance channel 162 adjacent to the cabinet door of the power cabinet 140 and facing the base 110, and the door body 153 of the black start control box 150 and the cabinet door of the power cabinet 140 are configured to open to maintenance channels in different directions of the base 110.

[0137] In the technical solution of the present application, the black start control box 150 is installed on the first side of the second maintenance channel 162 adjacent to the cabinet door of the power cabinet 140 and facing the base 110, and is tightly integrated with the power cabinet 140, which can reduce the distance of cable connection and signal transmission, help improve the stability and response speed of signal transmission, give full play to the operational convenience of the equipment, and increase space utilization efficiency. At the same time, the black start control box 150 is directly installed on the side of the power cabinet 140, which also saves additional installation space, making the entire equipment structure more compact and efficient.

[0138] The door body 153 and the cabinet door are opened to the first maintenance channel 161 and the second maintenance channel 162 in different directions respectively, which can ensure the safety and reliability of the equipment. Even if one of the door bodies 153 or the cabinet door is opened, it will not affect the closed state of the other. When maintenance personnel conduct equipment inspection and maintenance, they can approach the black start control box 150 and the power cabinet 140 from different channels respectively, avoiding mutual interference and collision that may occur during operation by maintenance personnel, preventing safety hazards caused by misoperation or negligence, ensuring the safety of equipment during normal operation, and improving the safety and efficiency of maintenance work.

[0139] It can be understood that by installing the black start control box 150 on the first side of the power cabinet 140, and the design in which the door body 153 and the cabinet door are opened in maintenance channels in different directions, the spatial layout and operational convenience of the equipment can be optimized, the safety and efficiency of maintenance work can be improved, and it helps to improve the operating stability and maintenance management level of the entire photovoltaic power generation system 20.

[0140] In some embodiments, Fig. 9 As shown, the projection of the black start control box 150 on the first side surface is located inside the first side surface;

[0141] The distance from the bottom of the black start control box 150 to the upper surface of the base 110 is within the target range.

[0142] In the technical solution of the present application, the projection of the black start control box 150 on the first side is located within the first side, which can ensure that the black start control box 150 is completely fitted on the side of the power cabinet 140 without exceeding the boundary of the side, which not only makes the overall appearance more neat and beautiful, but also enhances the stability of the structure. The black start control box 150 fits tightly on the side, reducing potential failures caused by looseness or shaking, and improving the reliability of the equipment.

[0143] The design that the distance L from the bottom of the black start control box 150 to the upper surface of the base 110 is within the target range meets the installation height and space requirements of the black start control box 150. By setting a reasonable distance range, it can be ensured that the black start control box 150 will neither be too low to cause poor contact with the base 110 or be affected by ground moisture, nor too high to cause inconvenience in operation or occupy too much space.

[0144] It can be understood that the projection of the black start control box 150 on the first side is located within the first side, and the design that the distance L from the bottom of the black start control box 150 to the upper surface of the base 110 is within the target range ensures the stability and practicality of the equipment, and helps to improve the overall performance and user experience of the photovoltaic power generation system 20.

[0145] In some embodiments, Fig.11 and Fig.12 As shown, the mounting frame 190 may include: a base 191 , a vertical support beam 192 , a diagonal brace 193 , a mounting plate 194 and a top connecting member 195 .

[0146] The base 191 is supported on the integrated platform 120, and the back is connected to the power cabinet 140;

[0147] The vertical support beam 192 is mounted on the front side of the base 191;

[0148] The diagonal brace 193 is connected between the base 191 and the vertical support beam 192;

[0149] The mounting plate 194 is mounted on the front side of the vertical support beam 192, and the black start control box 150 is mounted on the front side of the mounting plate 194;

[0150] The top connecting member 195 is installed on the back of the mounting plate 194 and is connected to the power cabinet 140 .

[0151] In the technical solution of the present application, the mounting frame 190 is a structural component, which can be connected by a base 191, a vertical support beam 192, a diagonal brace 193 and a mounting plate 194 by bolts, welding or other fastening methods to support and fix the equipment to ensure the stability and safety of the equipment during use. The base 191 is the basic part of the mounting frame 190, which is fixed on the integrated platform 120 to provide a stable support surface, and the back of the base 191 is connected to the power cabinet 140, so that not only can the weight and stability of the power cabinet 140 be used to stabilize the entire mounting frame 190, but also it is convenient for electrical connection and management.

[0152] The vertical support beam 192 is installed perpendicular to the base 191 to provide vertical support on the front side of the base 191. The lower end is fixed on the integrated platform 120, and the upper end is used to support the mounting plate 194 and other equipment that may be installed.

[0153] The diagonal brace 193 is connected between the base 191 and the vertical support beam 192 and is installed at a certain angle to reinforce and increase the stability of the entire mounting frame 190 structure and prevent the mounting frame 190 from twisting or deforming when subjected to force.

[0154] The mounting plate 194 is mounted on the front side of the vertical support beam 192 and fixed on the vertical support beam 192 to provide a plane for mounting equipment, such as the black start control box 150.

[0155] The black start control box 150 is a key device of the power system, which is used to perform black start operation and restore power supply after a power system failure. It can be installed on the mounting plate 194 to facilitate wiring, debugging and maintenance.

[0156] The top connecting member 195 is installed on the back of the mounting plate 194 and is connected to the power cabinet 140 , using the weight and stability of the power cabinet 140 to stabilize the entire mounting frame 190 .

[0157] It can be understood that the mounting frame 190 can provide a stable and reliable installation environment for the black start control box 150. The reasonable structural design and connection method between the various components ensure the stability and load-bearing capacity of the entire mounting frame 190, thereby ensuring that the black start control box 150 can work normally at critical moments.

[0158] The following describes the embodiments of the present application in detail from two different implementation perspectives.

[0159] 1. The black start control box 150 is installed on the base 110

[0160] In this embodiment, the black start control box 150 is installed on the base 110 through the support of the column 170 and the beam 180, wherein the black start control box 150 can be installed on the beam 180 by bolts, and the beam 180 can be installed on the column 170 by welding or snapping to form a horizontal support surface, and the column 170 is fixed to the base 110 by casting as a load-bearing component.

[0161] In actual operation, the black start control box 150 and the power cabinet 140 are respectively installed on both sides of the first maintenance channel 161 of the base 110, and the door body 153 of the black start control box 150 and the cabinet door of the power cabinet 140 are configured to open toward the first maintenance channel 161, and the distance between the door body 153 and the cabinet door is greater than the sum of the widths of the door body 153 and the cabinet door, thereby ensuring the maximum door opening maintenance space of the power cabinet 140 and the black start control box 150 and meeting the bending space requirements for wiring.

[0162] At the same time, the black start control box 150 is installed in the installation area along the length direction of the first maintenance channel 161. The midpoint of the installation area is opposite to the wiring point of the power cabinet 140. The distance from both ends of the installation area to the midpoint along the length direction X of the first maintenance channel 161 is the width of the door body 153, which can ensure the shortest wiring path.

[0163] The advantage of this solution is that no changes are made to the original integrated platform 120, and the consistency of the appearance of the same power station product is maintained. By directly installing the black start control box 150 on the base 110, additional installation space and brackets can be saved, making the spatial layout of the entire photovoltaic power generation system 20 more efficient. Fixing the black start control box 150 in the installation area of ​​the integrated platform 120 can ensure close coordination and collaborative work between the black start control box 150 and other equipment and components, thereby improving the integration and operating efficiency of the entire system.

[0164] 2. Black start control box 150 is installed on integrated platform 120

[0165] In this embodiment, the black start control box 150 is fixed on the integrated platform 120 through a mounting frame 190, wherein the mounting frame 190 is a structural component that can be connected by a base 191, a vertical support beam 192, a diagonal brace 193 and a mounting plate 194 through bolts, welding or other fastening methods to support and fix the equipment to ensure the stability and safety of the equipment during use.

[0166] In actual working process, the black start control box 150 is installed on the first side of the power cabinet 140, so that the black start control box 150 is closely integrated with the power cabinet 140, which can reduce the distance of cable connection and signal transmission, ensure the shortest wiring path, and meet the bending space requirements of wiring. The door body 153 facing the black start control box 150 and the cabinet door of the power cabinet 140 are configured to open to the maintenance channels in different directions of the base 110, so that the door body 153 and the cabinet door do not interfere with each other, thereby ensuring the safety of the equipment during normal operation and improving the safety and efficiency of maintenance work.

[0167] The advantage of this solution is that it does not require on-site customer wiring and debugging, which can save the cost and time of on-site debugging. By installing the black start control box 150 on the integrated platform 120, additional installation space can be saved, making the spatial layout of the entire photovoltaic power generation system 20 more efficient. By closely integrating the black start control box 150 with the power cabinet 140, the distance of cable connection and signal transmission can be reduced, which helps to improve the stability and response speed of signal transmission, and enhance the operating stability and maintenance management level of the entire photovoltaic power generation system 20.

[0168] According to an embodiment of the present application, a photovoltaic power generation system 20 is provided. The photovoltaic power generation system 20 includes: a photovoltaic sub-array 21.

[0169] The power transformation equipment group 130 is used to be electrically connected to the photovoltaic sub-array 21 .

[0170] In the technical solution of the present application, the substation equipment group 130 is an important power distribution facility in the photovoltaic power generation system 20, including an inverter 131 and a transformer 132, which are used to convert the direct current generated by the photovoltaic sub-array 21 into alternating current suitable for grid connection, and increase the voltage to a level matching the grid voltage so as to connect to the grid and transmit power. The photovoltaic sub-array 21 is electrically connected to the inverter 131 through cables and switch devices, and the electric energy generated by each photovoltaic sub-array 21 is transmitted to the substation equipment group 130 through cables for transformation and conversion.

[0171] It is understandable that the substation equipment group 130 plays an important role in the electrical connection with the photovoltaic power generation system 20. It can not only convert the direct current generated by the photovoltaic power generation system 20 into alternating current suitable for grid connection, but also ensure the safety and stability of the power system.

[0172] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0173] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0174] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0175] In the description of the present application, “plurality” means two or more.

[0176] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0177] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0178] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0179] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An inverter system, applied to a photovoltaic power generation system, characterized in that: include: Integrated platform; A substation equipment group, wherein the substation equipment group is installed on the integrated platform; A power cabinet, which is installed on the integrated platform and is electrically connected to the power transformation equipment group; A black start control box is electrically connected to the power cabinet, and a projection of the black start control box along the vertical direction on the upper surface of the base where the integrated platform is located is located within the upper surface of the base.

2. The inverter system according to claim 1, characterized in that: The black start control box comprises: A box body with an open end, wherein a waterproof terminal is led out from the bottom wall of the box body; A door body is installed at the open end of the box body in an openable and closable manner, and a lock is provided between the door body and the box body.

3. The inverter system according to any one of claims 1 to 2, characterized in that: The black start control box is suitable for being installed on the base where the integrated platform is located.

4. The inverter system according to claim 3, characterized in that: The black start control box and the power cabinet are respectively located on both sides of the first maintenance channel of the base in the width direction.

5. The inverter system according to claim 4, characterized in that: The door body of the black start control box and the cabinet door of the power cabinet are both configured to open toward the first maintenance passage, and the distance between the door body and the cabinet door is greater than the sum of the widths of the door body and the cabinet door; and / or, The black start control box is installed in the installation area along the length direction of the first maintenance passage, the midpoint of the installation area is directly opposite to the wiring point of the power cabinet, and the distance from both ends of the installation area along the length direction of the first maintenance passage to the midpoint is the width of the door body; and / or, The distance from the bottom of the black start control box to the upper surface of the base is within the target interval.

6. The inverter system according to claim 3, characterized in that: Also includes: A column, wherein the column is mounted on the base; A crossbeam is installed on the column, and the black start control box is installed on the crossbeam.

7. The inverter system according to any one of claims 1-2, characterized in that: The black start control box is installed on the integrated platform.

8. The inverter system according to claim 7, characterized in that: The black start control box is installed on the first side of the power cabinet, the first side is adjacent to the cabinet door of the power cabinet and faces the side of the second maintenance channel of the base, and the door body of the black start control box and the cabinet door of the power cabinet are configured to open to maintenance channels in different directions of the base.

9. The inverter system according to claim 8, characterized in that: The projection of the black start control box on the first side surface is located inside the first side surface; and / or, The distance from the bottom of the black start control box to the upper surface of the base is within the target interval.

10. The inverter system according to claim 7, characterized in that: Also included is a mounting frame, the mounting frame comprising: A base, the base is mounted on the integrated platform, and the back of the base is connected to the power cabinet; A vertical support beam, the vertical support beam being mounted on the front side of the base; A diagonal brace connected between the base and the vertical support beam; A mounting plate, the mounting plate being mounted on the front side of the vertical support beam, and the black start control box being mounted on the front side of the mounting plate; A top connecting piece is installed on the back of the mounting plate and is connected to the power cabinet.

11. A photovoltaic power generation system, characterized in that: include: Photovoltaic sub-array; According to the inverter system as described in any one of claims 1 to 8, the power transformation equipment group is used to be electrically connected to the photovoltaic sub-array.

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