A medium-sized inverter and booster integrated machine device

Abstract

The present application relates to the technical field of photovoltaic power distribution, and particularly relates to a medium-sized inverter and booster integrated machine device. The present application comprises a direct current busbar box and an inverter, the direct current busbar box is connected with the inverter through direct current wires, the direct current busbar box and the inverter are integrally arranged as a modular assembly, the modular assembly composed of the direct current busbar box and the inverter is connected with a solar power generation module and a power distribution bus through wires respectively, and the direct current busbar box and the inverter are communicatively connected with a power control unit through monitoring data lines and control data lines. The direct current busbar box and the inverter are integrated as a modular assembly, the structure is compact, the installation occupies a small area, and the centralized arrangement and batch production are facilitated, while the installation and wiring workload is reduced, and the construction efficiency is improved. The direct current busbar box, the inverter and the power control unit are connected with a central control computer and a data analysis platform through a communication interface, so that centralized management, remote operation and maintenance, accurate control, rapid fault positioning and predictive maintenance are realized.

Description

Technical Field

[0001] This invention relates to the technical field of photovoltaic power distribution, and in particular to a medium-sized inverter-boost integrated equipment. Background Technology

[0002] Photovoltaic power generation technology is a clean energy generation method that uses photovoltaic modules to directly convert solar energy into electrical energy. It has advantages such as no noise, no pollution, and abundant resources. A photovoltaic system usually consists of photovoltaic modules, DC combiner devices, inverters, step-up transformers, and power distribution facilities. In distributed photovoltaic application scenarios such as industrial and commercial rooftops, photovoltaic power generation systems can directly utilize the building roof area to install modules, closely integrating the power generation side and the power consumption side to achieve local consumption and grid connection.

[0003] In traditional solutions, the transmission of photovoltaic power requires multiple energy conversion and transmission stages. The entire system is usually divided into four main stages: DC output from the modules, inversion by the inverter, step-up transformer for step-up, and power distribution. During this process, each stage will generate power loss due to long-distance transmission, with cumulative losses reaching more than 10%, which has a significant impact on the overall power generation efficiency of the photovoltaic system.

[0004] Furthermore, in existing technologies, communication between the inverter and the box-type transformer typically requires an additional independent data acquisition unit, as well as accessories such as power supply lines, signal lines, and network cables. The background monitoring system also needs to collect and manage data from the inverter and the box-type transformer separately. This not only increases the complexity of design and construction but also increases the difficulty of system deployment and construction cycle. In later operation and maintenance, the decentralized monitoring architecture also increases the workload of inspection, data comparison, and fault diagnosis, reduces operation and maintenance efficiency, and increases operation and maintenance costs. Summary of the Invention

[0005] To address the issues of high energy loss, dispersed equipment and communication systems, complex installation and maintenance, and high costs, this invention provides a medium-sized inverter-boost integrated unit.

[0006] The medium-sized inverter-boost integrated unit provided by this invention adopts the following technical solution:

[0007] A medium-sized inverter-boost integrated unit includes a DC combiner box and an inverter. The DC combiner box is connected to the inverter via DC wires. The DC combiner box and the inverter are integrated as a modular component. The modular component consisting of the DC combiner box and the inverter is connected to a solar power generation module and a power distribution bus via wires. The DC combiner box and the inverter are communicatively connected to a power control unit via monitoring data lines and control data lines.

[0008] The highly integrated DC combiner, inverter, and boost processes avoid the additional power loss caused by long-distance cable transmission between traditional separate equipment, effectively reducing overall system energy loss and improving power generation efficiency. The previously dispersed DC combiner boxes and inverters are integrated into modular components, reducing the number of devices and intermediate wiring links, simplifying wiring design, and lowering the overall system installation complexity and construction cycle. Monitoring and control data lines directly connect the combiner boxes, inverters, and power control units, enabling unified monitoring, data acquisition, and power dispatch. No additional independent data acquisition devices or supporting power supply, signal, and network cabling are required, resulting in a more compact and efficient communication architecture. The modular integrated design facilitates unified monitoring and centralized management, reducing the complexity of multi-device, multi-backend monitoring in traditional architectures. This helps to quickly locate faults, shorten maintenance time, and reduce operation and maintenance costs. The integrated module reduces the need for separate cabinets and mounting brackets, making it particularly suitable for deployment on commercial and industrial rooftops and in restricted environments. It helps improve the power generation capacity per unit area of ​​the photovoltaic system. The modular structure design facilitates mass production and flexible configuration, allowing for expansion or combination according to different capacity and voltage level requirements, adapting to various commercial and industrial distributed photovoltaic access scenarios.

[0009] Furthermore, the DC combiner box is connected to the solar panels via DC cables. Multiple solar panels are grouped together and connected to the DC combiner box via a string access port. The DC combiner box is connected to the inverter via a DC input interface.

[0010] The system adopts a centralized combiner design, which centralizes the DC output of multiple module strings for transmission, reducing scattered wiring and line losses. It also reduces the amount of cable used on the DC side, improving the overall transmission efficiency of the system. The unified combiner port reduces the need for multiple DC input connections at the inverter end, simplifying installation steps and wiring layout, and facilitating rapid deployment and construction. The centralized combiner design allows for independent detection and monitoring of each string at the DC combiner box, facilitating the location of faulty components or lines and shortening troubleshooting and repair time. The DC combiner box integrates overcurrent protection, surge protection, and isolating switches, effectively preventing DC-side line faults while centrally combining the DC output, improving the safety and reliability of system operation. Through standardized string access ports and DC input interfaces, it can easily adapt to photovoltaic modules of different specifications and power levels, and future expansion can be completed with minimal modifications.

[0011] Furthermore, the capacity of the DC combiner box is 700-1500kW, and the number of connected strings at the string access port is 70-100.

[0012] The high-capacity design can meet the centralized current collection needs of industrial and commercial photovoltaic and medium-to-large ground-mounted power plants. A single device can support a large-area module array, reducing the equipment investment and maintenance difficulty caused by multiple combiner boxes in parallel. The current collection capacity of 70-100 strings significantly reduces the number of devices and the space occupied, while also reducing the amount of cable laying and connectors used, directly reducing engineering construction costs. The centralized configuration of large capacity and multiple access points enables system operation and maintenance personnel to complete the current and voltage monitoring and fault diagnosis of all strings in a single combiner box, improving operation and maintenance efficiency. The capacity and number of channels are designed flexibly, and the appropriate specifications and models can be selected according to the scale of the photovoltaic array to meet the gradient expansion needs of different engineering scenarios.

[0013] Furthermore, the inverter includes an inverter circuit and a rectifier circuit. The two sides of the inverter's electrical connection are respectively set as DC side and AC side. The inverter is connected to a step-up transformer. The two sides of the step-up transformer's electrical inductance are respectively set as low-voltage side and high-voltage side. The inverter and the step-up transformer are connected to a capacity ratio controller through control wires.

[0014] The capacity ratio controller can adjust the matching relationship between the inverter output and the transformer step-up ratio in real time according to the output characteristics of the photovoltaic modules and the load demand, so that the system operates at the optimal power point, improves the overall power generation efficiency, and dynamically adjusts the AC output of the inverter and the input of the step-up transformer. This can reduce voltage fluctuations and harmonic distortion, improve the stability and power factor of the output power, and reduce the thermal and electrical stress of electrical equipment at all levels by optimizing the electrical matching between the inverter and the transformer, thereby extending the service life and reducing the failure rate. The capacity ratio controller can quickly adjust the matching parameters under abnormal operating conditions (such as overload and voltage change) to prevent equipment overload or instability and enhance the safety of system operation. This configuration can flexibly respond to different weather conditions and load changes, ensuring that the photovoltaic power station maintains a high energy conversion efficiency even under low irradiance in the morning and evening or peak load conditions.

[0015] Furthermore, the voltage level of the high-voltage side of the step-up transformer is 10kV, and the preset capacity ratio parameter of the capacity ratio controller is 1-1.3.

[0016] The 10kV high-voltage output directly meets the medium-voltage grid connection voltage requirements of most distribution networks, reducing the need for additional step-up equipment and supporting facilities, and achieving simple and efficient grid connection. The preset capacity ratio parameter of 1–1.3 ensures that the inverter and step-up transformer remain in the optimal matching range under most operating conditions, reducing energy loss and improving power conversion efficiency. The reasonable capacity ratio setting can prevent the inverter from operating in overload or underload conditions, reduce the electrical and thermal stress of components, extend equipment life, and reduce the failure rate. The reasonable capacity ratio range has good adaptability to light fluctuations, temperature changes, and load changes, ensuring stable output of the photovoltaic system under different meteorological conditions and power demand. By accurately matching the output voltage with the network voltage level, additional step-up links are reduced, reducing initial equipment investment and subsequent operation and maintenance workload.

[0017] Furthermore, the power control unit includes a maximum power point tracking module and an uninterruptible power supply module.

[0018] The Maximum Power Point Tracking (MPPT) module can track the output characteristics of photovoltaic modules in real time and dynamically adjust the operating point, enabling the photovoltaic system to operate at its maximum power point under different light and temperature conditions, significantly improving power generation. The Uninterruptible Power Supply (UPS) module can immediately switch to energy storage power supply in the event of power failure or outage, ensuring the continuous operation of critical loads and avoiding equipment shutdown or data loss due to power outages. The combination of MPPT dynamic adjustment and UPS backup power supply not only optimizes the real-time output of photovoltaic power but also comprehensively improves the system's stable power supply capability in emergencies. Reasonable power regulation and seamless switching can reduce the electrical and thermal shocks of key components such as inverters and energy storage batteries, delay performance degradation, and reduce maintenance frequency. This combination is suitable for grid-connected and off-grid photovoltaic systems, industrial power supply, communication base stations, and other scenarios requiring high-reliability power supply, and can still operate stably under extreme weather and grid fluctuation conditions.

[0019] Furthermore, the preset control power of the uninterruptible power supply module is 2kVA.

[0020] A 2 kVA power setting can cover the total power requirements of the controller, monitoring system, communication equipment and necessary auxiliary loads in the photovoltaic system. It ensures the power supply capacity of the UPS while avoiding the cost waste caused by oversized design. The reasonable power capacity design reduces the heat load and conversion loss of UPS operation, reduces the risk of overload, and extends the life of the internal energy storage unit and inverter of the UPS. This power setting is suitable for most small and medium-sized photovoltaic grid-connected and off-grid scenarios, and is especially suitable for power plants or distributed generation systems that require high availability and 24 / 7 monitoring.

[0021] Furthermore, the maximum power point tracking module and the uninterruptible power supply module are respectively connected to the voltage monitoring unit and the current monitoring unit via data wires. The voltage monitoring unit and the current monitoring unit monitor the DC combiner box and the inverter respectively. Temperature and humidity detection modules are installed in the DC combiner box and the inverter.

[0022] Real-time voltage and current monitoring continuously provides accurate operating data to the MPPT and UPS, making MPPT calculations more precise and UPS switching more timely, ensuring stable power supply performance. The temperature and humidity detection module reflects the internal environmental status of the DC combiner box and inverter in real time, providing important reference for power regulation and equipment protection, preventing efficiency degradation or failures caused by high temperature or humidity. When abnormal electrical parameters or excessive internal temperature and humidity are detected, active protection can be provided in conjunction with MPPT power regulation and UPS automatic switching to avoid equipment damage and power outages. Dynamic monitoring of environmental and electrical parameters allows the system to operate within a safe operating range, effectively reducing electrical and thermal shocks caused by overheating, humidity or load fluctuations, and delaying component aging. Data collected by multiple monitoring units can be uploaded to the monitoring platform through the communication interface to realize remote operation and maintenance and preventive maintenance, reducing the number of on-site inspections and costs.

[0023] Furthermore, the DC combiner box, inverter, and power control unit are connected to a communication interface, and are connected to a central control computer via the communication interface. The central control computer is connected to a data analysis platform.

[0024] The operating status and data of all key equipment can be collected in real time to the central control computer, enabling unified monitoring and centralized management. This avoids information delays or omissions caused by decentralized operations. The data analysis platform can comprehensively analyze the collected multi-dimensional data such as voltage, current, power, temperature, and humidity to generate optimal control strategies, thereby simultaneously improving power generation efficiency and power safety. Centralized data management and analysis can quickly locate specific equipment and fault causes when anomalies are detected, and directly issue adjustment or protection commands through central control, significantly shortening troubleshooting time. Through trend analysis of historical operating data, the data analysis platform can identify potential fault risks in advance, guide maintenance plans, reduce sudden downtime accidents, and extend equipment life. The communication interface and platform architecture are compatible with remote access, supporting remote monitoring, control, and software upgrades. It can also interface with other energy management systems or cloud platforms to achieve functional expansion and system upgrades.

[0025] Furthermore, the DC combiner box, inverter, and power control unit are enclosed and installed in a dustproof housing. The dustproof housing is connected to and equipped with an air-cooling system. The dustproof housing is provided with a waterproof layer with a waterproof rating of IP65.

[0026] The IP65-rated waterproof layer effectively prevents the equipment from being washed by rain and dust intrusion, ensuring stable operation in complex outdoor environments such as wind, sand, and rain. The dustproof housing isolates external dust and particles from entering, preventing dust accumulation from affecting the heat dissipation and insulation performance of electrical components. It is suitable for harsh working conditions such as high dust and humidity. The air-cooling system can quickly remove the heat generated by the working components inside the housing, preventing power attenuation or component damage due to overheating, and improving system reliability. The comprehensive waterproof, dustproof, and temperature control measures reduce the impact of environmental factors on the equipment's corrosion, aging, and thermal stress, thereby improving the long-term stability and service life of the equipment. The external environment's erosion of core components is reduced, the workload of daily maintenance is reduced, and the economic losses caused by downtime due to failure are reduced.

[0027] In summary, the present invention has the following beneficial technical effects:

[0028] 1. The DC combiner box and inverter are integrated into a modular component, which has a compact structure, small installation footprint, facilitates centralized layout and mass production, and reduces installation and wiring workload, thereby improving construction efficiency.

[0029] 2. The DC combiner box supports a capacity of 700-1500kW, with up to 70-100 string access ports, allowing multiple solar panels to be connected at once and managed uniformly, reducing combiner losses and improving energy utilization.

[0030] 3. The inverter is directly connected to the step-up transformer, with a high-voltage side voltage level of 10kV, which reduces energy loss in intermediate links and is suitable for direct connection to medium-voltage distribution networks, thereby improving power transmission efficiency.

[0031] 4. The capacity ratio controller has preset parameters of 1-1.3, which can flexibly adjust the capacity ratio according to the power generation capacity and load demand to achieve the best operating state and improve the power generation performance of the system.

[0032] 5. The power control unit has a built-in maximum power point tracking (MPPT) module to accurately track the optimal power point of the photovoltaic array; combined with a 2kVA uninterruptible power supply (UPS) module, it ensures that the critical monitoring and control system continues to operate during power outages.

[0033] 6. The voltage monitoring unit, current monitoring unit, and temperature and humidity detection module enable real-time monitoring of electrical and environmental data of the DC combiner box and inverter, ensuring operational safety and providing data support for performance optimization.

[0034] 7. The DC combiner box, inverter, and power control unit are connected to the central control computer and data analysis platform through communication interfaces to achieve centralized management, remote operation and maintenance, precise control, rapid fault location, and predictive maintenance.

[0035] 8. The fully enclosed dustproof housing effectively isolates dust and particulate matter, and the IP65 waterproof layer can prevent rain, spray and moisture corrosion, ensuring long-term stable operation of the equipment in complex outdoor environments.

[0036] 9. The dustproof housing integrates an air-cooling system to promptly remove the heat generated during equipment operation, preventing power attenuation and component damage caused by excessive temperature rise, thereby improving equipment reliability and lifespan.

[0037] 10. The synergistic effect of multi-layer protection, intelligent monitoring and optimized control significantly reduces equipment failure rate and maintenance frequency, reduces downtime losses and maintenance costs, and improves the economy and sustainability of the equipment throughout its entire life cycle. Attached Figure Description

[0038] Figure 1 This is a schematic diagram showing the connections of the various components of the present invention;

[0039] Figure 2 This is a schematic diagram of the dustproof housing structure of the present invention;

[0040] Figure 3 This is a circuit diagram of the inverter and transformer system of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. DC combiner box; 11. DC cable; 12. String access port; 13. DC input interface; 2. Inverter; 201. Fuse protector; 202. Surge protector; 203. Manual switch; 204. Circuit breaker; 21. Step-up transformer; 211. Low-voltage current transformer; 212. High-voltage current transformer; 213. Voltage transformer; 214. Lightning arrester; 215. Voltage indicator; 216. Three-phase meter; 22. Capacity ratio controller; 3. Power control unit; 31. Maximum power point tracking module; 32. Uninterruptible power supply module; 33. Voltage monitoring unit; 34. Current monitoring unit; 35. Temperature and humidity detection module; 4. Communication interface; 41. Central control computer; 42. Data analysis platform; 5. Dustproof housing; 51. Air-cooling system; 52. Waterproof layer. Detailed Implementation

[0043] The following will be combined with the appendix Figures 1-3 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] Currently, most commercial and industrial rooftop distributed photovoltaic projects have an installed capacity of less than 6MW. They are usually connected to the existing power distribution room or power distribution bus in the factory area at a voltage level of 10kV to achieve grid connection with the factory's power supply system.

[0046] In existing engineering designs, such photovoltaic systems generally adopt an architecture of "module string - string inverter - low-voltage AC bus - box-type step-up transformer - 10kV switch station". The specific process is as follows: photovoltaic modules are formed into strings according to a certain number and wiring method, and connected to the string inverter through DC cables. In the inverter, the DC power is inverted and stepped up to 400V or 800V low-voltage AC, and then sent to the 10kV box-type transformer to raise the voltage to 10kV. Finally, it is connected to the grid of a newly built or existing switch station through a daisy-chain connection.

[0047] Basic Implementation Example:

[0048] This invention discloses a medium-sized inverter-boost integrated unit, referring to... Figure 1 The system includes a DC combiner box 1 and an inverter 2. The DC combiner box 1 is connected to the inverter 2 via DC wires. The DC combiner box 1 and the inverter 2 are integrated into a modular component. The modular component consisting of the DC combiner box 1 and the inverter 2 is connected to the solar power generation module and the power distribution bus via wires. The DC combiner box 1 and the inverter 2 are communicatively connected to a power control unit 3 via monitoring data lines and control data lines.

[0049] Reference Figure 1 The DC combiner box 1 is connected to the solar power panels via DC cables 11. Multiple solar power panels are grouped together and connected to the DC combiner box 1 via string access port 12. The DC combiner box 1 is connected to the inverter 2 via DC input interface 13.

[0050] The capacity of the DC combiner box 1 is 700-1500kW, and the number of strings connected to the string access port 12 is 70-100.

[0051] Reference Figure 1The inverter 2 includes an inverter circuit and a rectifier circuit. The two sides of the inverter 2 are respectively set as DC power side and AC power side. The inverter 2 is connected to a step-up transformer 21. The two sides of the step-up transformer 21 are respectively set as low voltage power side and high voltage power side. The inverter 2 and the step-up transformer 21 are connected to a capacity ratio controller 22 through control wires.

[0052] The voltage level of the high-voltage side of the step-up transformer 21 is 10kV, and the preset capacity ratio parameter of the capacity ratio controller 22 is 1-1.3.

[0053] Reference Figure 1 The power control unit 3 includes a maximum power point tracking module 31 and an uninterruptible power supply module 32.

[0054] The preset control power of the uninterruptible power supply module 32 is 2kVA.

[0055] Reference Figure 1 The maximum power point tracking module 31 and the uninterruptible power supply module 32 are respectively connected to the voltage monitoring unit 33 and the current monitoring unit 34 via data wires. The voltage monitoring unit 33 and the current monitoring unit 34 monitor the DC combiner box 1 and the inverter 2 respectively. Temperature and humidity detection modules 35 are installed in the DC combiner box 1 and the inverter 2.

[0056] Reference Figure 1 The DC combiner box 1, inverter 2 and power control unit 3 are connected to a communication interface 4, and a central control computer 41 is externally connected through the communication interface 4. The central control computer 41 is connected to a data analysis platform 42.

[0057] Reference Figure 2 The DC combiner box 1, inverter 2 and power control unit 3 are enclosed and installed in a dustproof housing 5. The dustproof housing 5 is connected to and installed with an air-cooling system 51. A waterproof layer 52 is provided on the dustproof housing 5, and the waterproof layer 52 has a waterproof rating of IP65.

[0058] The installation steps include:

[0059] When selecting an installation location for the equipment, ensure that the ground is flat and has good drainage conditions to prevent water from entering the equipment. Pre-embed the equipment fixing bolts and grounding body in the installation area according to the foundation dimensions in the design drawings.

[0060] Install the DC combiner box 1, inverter 2 and power control unit 3 together in the dustproof housing 5, and fix the air cooling system 51. Check the integrity of the waterproof layer 52 of the dustproof housing 5 to ensure that the waterproof rating reaches IP65.

[0061] Using hoisting equipment, the DC combiner box 1, inverter 2, and power control unit 3 modular assembly are hoisted onto the foundation platform, aligned with the pre-embedded bolt mounting holes, and the level of the modular assembly is adjusted.

[0062] Connect the string wires of the solar panels to the string input port 12 of the DC combiner box 1, ensuring the correct polarity. The DC combiner box 1 is connected to the DC input interface 13 of the inverter 2 via DC cable 11, using double-insulated wires and waterproof connectors. The AC output terminal of the inverter 2 is connected to the low-voltage side of the step-up transformer 21 via AC cable, and the high-voltage side of the step-up transformer 21 is connected to the distribution bus.

[0063] The power control unit 3 is connected to the monitoring ports of the DC combiner box 1 and the inverter 2 via a monitoring data line.

[0064] The communication interface 4 is connected to the central control computer 41 and networked with the data analysis platform 42.

[0065] During testing, a megohmmeter is used to test the insulation resistance of the DC side, AC side, and control circuit. A grounding resistance tester is used to test the grounding electrode. The results should meet the design and specification requirements. Under simulated photovoltaic input conditions, inverter 2 is started to check the efficiency of DC to AC conversion, verify the turns ratio of step-up transformer 21 and the regulation performance of capacity ratio controller 22, test the response speed and accuracy of maximum power point tracking module 31 under different light intensities, disconnect the external power supply, verify whether uninterruptible power supply module 32 can maintain monitoring operation, check whether the data is transmitted to the central control computer 41 and data analysis platform 42 in real time, and ensure that the communication protocol is normal.

[0066] During formal operation, confirm that all access ports and protective connectors are secure, and that dustproof and waterproof measures are in good working order. Ensure that the air-cooling system 51 and temperature and humidity detection module 35 are operating normally. Then, turn on the power control unit 3, DC combiner box 1, and inverter 2 in sequence. Inverter 2 performs a self-test, including temperature, voltage, current, and communication status checks. The step-up transformer 21 is put into operation and adjusted to the set capacity ratio. The maximum power point tracking module 31 adjusts the operating point in real time to ensure optimal output power of the photovoltaic array. The voltage monitoring unit 33 and current monitoring unit 34 upload operating parameters in real time.

[0067] Installation and maintenance must be performed by personnel with relevant electrical qualifications. Live operation is strictly prohibited. Ensure that the waterproof and dustproof structure of the casing is not damaged during operation. Regularly check the working status of auxiliary equipment such as the air-cooling system 51 and temperature and humidity detection module 35. Before thunderstorms, ensure that the lightning protection device is working properly and avoid maintenance operations. Regularly evaluate the operating status through the data analysis platform 42 and perform predictive maintenance in a timely manner.

[0068] Example 1:

[0069] Based on the basic implementation, the specific description is as follows:

[0070] The DC combiner box 1 has a capacity of 1000kW, the string access port 12 has 80 access strings, and the capacity ratio controller 22 has a preset capacity ratio parameter of 1.3.

[0071] By eliminating a large busbar booster stage, efficiency waste can be reduced by about 5%, improving the overall efficiency of the photovoltaic system and increasing power generation.

[0072] Example 2:

[0073] Based on the basic implementation, the specific description is as follows:

[0074] Communication interface 4 transmits information via optical fiber.

[0075] By simplifying data communication, this inverter booster device can directly monitor and regulate the power fluctuations of the components at the string level. It transmits component information and the device's own information to the switch station backend via a single optical fiber, eliminating the need for layer-by-layer signal transfer and aggregation through RS485 lines, network cables, optical fibers, or PLC communication methods. This indirectly enhances the stability and timeliness of the data.

[0076] Example 3:

[0077] Based on the basic implementation, the specific description is as follows:

[0078] Reference Figure 3 A manual switch 203 is connected between the inverter 2 and the DC input interface 13. A surge protector 202 is connected between the manual switch 203 and the inverter 2. A fuse protector 201 is connected in series between the manual switch 203 and the DC input interface 13. A circuit breaker 204 is connected in series with the inverter 2. The inverter 2 is connected to the low-voltage current transformer 211 side of the step-up transformer 21. A circuit breaker 204 and a surge protector 202 are connected in series between the inverter 2 and the step-up transformer 21.

[0079] A high-voltage current transformer 212 is connected in series on the opposite side of the step-up transformer 21 and the low-voltage current transformer 211. A voltage transformer 213 is connected and installed between the high-voltage current transformer 212 and the step-up transformer 21. The step-up transformer 21 is connected to the power distribution bus through the high-voltage current transformer 212. A three-phase meter 216 and a surge arrester 214 are connected in series between the high-voltage current transformer 212 and the power distribution bus. A voltage indicator 215 is connected to both the three-phase meter 216 and the surge arrester 214.

[0080] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the invention, and all such modifications and additions should fall within the protection scope of the present invention.

Claims

1. A medium-sized inverter-boost integrated equipment, comprising a DC combiner box (1) and an inverter (2), wherein the DC combiner box (1) is connected to the inverter (2) via a DC conductor, characterized in that: The DC combiner box (1) and the inverter (2) are integrated into a modular component. The modular component consisting of the DC combiner box (1) and the inverter (2) is connected to the solar power generation module and the power distribution bus via wires. The DC combiner box (1) and the inverter (2) are connected to a power control unit (3) via monitoring data lines and control data lines.

2. The medium-sized inverter-boost integrated equipment according to claim 1, characterized in that: The DC combiner box (1) is connected to the solar power panel via DC cable (11). Multiple solar power panels are grouped together and connected to the DC combiner box (1) via string access port (12). The DC combiner box (1) is connected to the inverter (2) via DC input interface (13).

3. The medium-sized inverter-boost integrated unit according to claim 2, characterized in that: The capacity of the DC combiner box (1) is 700-1500kW, and the number of strings connected to the string access port (12) is 70-100.

4. The medium-sized inverter-boost integrated unit according to claim 1, characterized in that: The inverter (2) includes an inverter circuit and a rectifier circuit. The two sides of the inverter (2) are respectively set as DC side and AC side. The inverter (2) is connected to a step-up transformer (21). The two sides of the mutual inductance of the step-up transformer (21) are respectively set as low voltage side and high voltage side. The inverter (2) and the step-up transformer (21) are connected to a capacity ratio controller (22) through control wires.

5. A medium-sized inverter-boost integrated unit according to claim 4, characterized in that: The voltage level of the high-voltage side of the step-up transformer (21) is 10kV, and the preset capacity ratio parameter of the capacity ratio controller (22) is 1-1.

3.

6. The medium-sized inverter-boost integrated unit according to claim 1, characterized in that: The power control unit (3) includes a maximum power point tracking module (31) and an uninterruptible power supply module (32).

7. A medium-sized inverter-boost integrated unit according to claim 6, characterized in that: The preset control power of the uninterruptible power supply module (32) is 2kVA.

8. A medium-sized inverter-boost integrated unit according to claim 6, characterized in that: The maximum power point tracking module (31) and the uninterruptible power supply module (32) are respectively connected to the voltage monitoring unit (33) and the current monitoring unit (34) via data wires. The voltage monitoring unit (33) and the current monitoring unit (34) monitor the DC combiner box (1) and the inverter (2) respectively. Temperature and humidity detection modules (35) are installed in the DC combiner box (1) and the inverter (2).

9. A medium-sized inverter-boost integrated unit according to any one of claims 1-8, characterized in that: The DC combiner box (1), inverter (2) and power control unit (3) are connected to a communication interface (4), and a central control computer (41) is connected to the communication interface (4). The central control computer (41) is connected to a data analysis platform (42).

10. A medium-sized inverter-boost integrated unit according to any one of claims 1-8, characterized in that: The DC combiner box (1), inverter (2) and power control unit (3) are enclosed and installed by a dustproof housing (5). The dustproof housing (5) is connected to and installed with an air-cooling system (51). A waterproof layer (52) is provided on the dustproof housing (5), and the waterproof layer (52) has a waterproof rating of IP65.

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