New energy grid connection method applied to new energy power generation system

Abstract

The invention relates to the technical field of new energy power generation systems, and discloses a new energy grid connection method applied to a new energy power generation system, and the method comprises the following steps: obtaining a new energy grid connection module; alternating current and direct current efficient conversion is carried out, accurate alternating current and direct current conversion is carried out on electric energy directly generated by a new energy power generation system through a high-performance grid-connected inverter, it is ensured that the energy loss in the conversion process is reduced to the minimum, and meanwhile the conversion efficiency is improved; and deep filtering processing: performing strict filtering processing on the direct current output by the inverter. According to the new energy grid-connected method applied to the new energy power generation system, in order to improve the energy conversion and grid-connected efficiency, accurate alternating current and direct current conversion is achieved through a high-performance grid-connected inverter, energy loss is greatly reduced, the conversion efficiency is improved, harmonic waves and noise are removed through deep filtering processing, it is ensured that the electric energy quality reaches the standard, and power grid interference is reduced; therefore, the energy conversion and grid connection efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation systems, and in particular to a renewable energy grid-connected method applied to renewable energy power generation systems. Background Art

[0002] In the power industry, new energy grid-connected technology refers to connecting new energy power generation systems (such as solar energy, wind energy, etc.) to the power grid to achieve the complementarity of power supply of the power system and new energy power generation. With the advancement of global energy transformation and sustainable development, new energy grid-connected technology has become an important trend in the power industry. Grid companies play a vital role in this process and are responsible for the access, operation, management and maintenance of new energy power generation systems.

[0003] At present, new energy grid-connected technology can be divided into centralized grid-connected and distributed grid-connected according to the type of new energy and the grid-connected method. Centralized grid-connected usually connects a large number of new energy power generation equipment to the grid, which is suitable for large-scale power supply; distributed grid-connected connects small new energy power generation equipment to the grid in a dispersed manner to achieve local power supply and power complementarity.

[0004] However, the current new energy grid-connected method applied to new energy power generation systems cannot well improve the energy conversion and grid-connected efficiency, realize accurate AC / DC conversion through high-performance grid-connected inverters, greatly reduce energy losses, and improve conversion efficiency, and cannot well enhance the stability and security of the power grid. Through refined power regulation and intelligent boost processing, ensure that parameters such as voltage and current adapt to power grid requirements, improve power grid stability, seamlessly connect to the grid to determine connection and synchronous operation strategies, and cannot well realize adaptive regulation and optimized operation, improve the overall efficiency of the system, and intelligently optimize the grid-connected process. It is inconvenient for operation and maintenance personnel to respond quickly. In view of this, we propose a new energy grid-connected method applied to new energy power generation systems. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy grid-connected method applied to a new energy power generation system to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A new energy grid-connected method applied to a new energy power generation system comprises the following steps:

[0008] S1. High-efficiency AC / DC conversion: the electric energy directly generated by the new energy power generation system (such as solar photovoltaic panels, wind turbines, etc.) is accurately converted to AC / DC through high-performance grid-connected inverters to ensure that the energy loss during the conversion process is minimized while improving the conversion efficiency;

[0009] S2. Deep filtering: strictly filter the DC power output by the inverter, use advanced filtering technology to remove harmonics and noise in the current, ensure that the power quality meets the grid connection standard, and reduce interference with the public power grid;

[0010] S3. Fine-grained power control: using high-precision power electronic equipment to fine-tune the filtered DC power, including precise control of parameters such as voltage, current, and power factor, to meet the needs of different grid access conditions;

[0011] S4, intelligent boost processing, through the intelligently controlled grid-connected transformer, the regulated DC power is boosted to ensure that the voltage level meets the access requirements of the public power grid. This process is combined with the real-time monitoring system to dynamically adjust the boost ratio to adapt to grid fluctuations;

[0012] S5, seamless grid connection judgment connection, after the boost is completed, the grid connection condition judgment is carried out, and a highly reliable grid connection switch is used to achieve seamless connection between the new energy power generation system and the public power grid, ensuring a smooth and fast grid connection process;

[0013] S6, synchronous operation strategy, through advanced synchronous control technology, the new energy power generation system and the public power grid can be synchronized to ensure that the power output after grid connection is coordinated with the grid demand and improve the overall stability of the grid;

[0014] S7, intelligent monitoring and optimization, the real-time monitoring system continuously monitors the operation status of the grid-connected system in all aspects, combines machine learning, artificial intelligence and other advanced algorithms to achieve adaptive adjustment and optimized operation of the system, accurately predicts output power, and dynamically adjusts the power generation strategy according to the actual needs of the power grid, effectively reducing grid-connected fluctuations and uncertainties, and improving the overall efficiency of the system;

[0015] S8, fast response to faults. Once a fault occurs in the grid-connected system, the automatic protection mechanism is immediately triggered to quickly cut off the connection with the public power grid to prevent the fault from expanding and ensure the safety of the power grid;

[0016] S9. Real-time reporting of fault information. Through an efficient communication system, fault information is sent to the remote monitoring center in real time, allowing operation and maintenance personnel to quickly locate problems and take corresponding measures;

[0017] S10. Intelligently optimize the grid-connected process. Continuously adopt and update intelligent control algorithms to comprehensively optimize the grid-connected process, including but not limited to improving conversion efficiency, reducing maintenance costs, and enhancing system stability, to ensure that the new energy power generation system can continuously and efficiently provide clean energy to the public power grid.

[0018] Preferably, the grid-connected inverter comprises:

[0019] Inverter body:

[0020] The power conversion module, whose core components use IGBT (insulated gate bipolar transistor) or other advanced semiconductor switching devices, is responsible for efficiently converting direct current (DC) into alternating current (AC) with the same frequency and phase as the power grid;

[0021] Filter circuit, used to smooth the AC waveform output by the inverter, reduce harmonic content, improve power quality, and ensure compliance with grid access standards;

[0022] Isolation transformers provide electrical isolation to protect the grid and user equipment from potential faults and help achieve voltage level matching;

[0023] Control unit:

[0024] The microprocessor or DSP (digital signal processor), as the brain, is responsible for receiving sensor data, executing control algorithms, and adjusting the inverter working state to achieve maximum power point tracking (MPPT), grid synchronization, fault detection and protection functions;

[0025] Communication interface, supporting multiple communication protocols (such as Modbus, CAN, Ethernet), facilitating remote monitoring, data logging and integration with other smart devices (such as photovoltaic array monitors, energy storage systems);

[0026] User interface, including display screen and buttons, used to set parameters locally, view operating status and fault information;

[0027] Cooling System:

[0028] The heat sink and fan effectively dissipate the heat generated by the electronic components inside the inverter by increasing the heat dissipation area and forced convection, ensuring the stability and reliability of the equipment under long-term high-load operation;

[0029] Intelligent temperature control system automatically adjusts the fan speed according to the internal temperature of the inverter, ensuring heat dissipation and saving energy;

[0030] Dust-proof and waterproof design uses special materials and sealing structure to prevent dust and water vapor from intruding and extend the service life of the equipment.

[0031] Preferably, the deep filtering process uses an LC filter to filter the DC power, and the high-frequency noise in the DC power is filtered out by adjusting the filter parameters. The cutoff frequency calculation formula of the LC low-pass filter is usually expressed as:

[0032]

[0033] Where fc is the filter cutoff frequency, L is the inductance value (unit: Henry, H), C is the capacitance value (unit: Farad, F), and 2π is a constant representing twice the pi, π.

[0034] By adjusting the values ​​of L and C, fc can be flexibly controlled to ensure that high-frequency noise is effectively filtered out while keeping the DC component basically unaffected.

[0035] Preferably, the grid-connected transformer adopts a dry-type transformer with the following technical parameters: rated capacity is not less than 100kVA; rated voltage is 10kV; insulation grade is F.

[0036] Preferably, the real-time monitoring system includes: a current sensor, a voltage sensor, a temperature sensor, and a data acquisition and processing unit.

[0037] Preferably, the communication system adopts a combination of wired and wireless communication, including:

[0038] Wired communication module, as the basic part of the communication system, is mainly responsible for efficient and stable data transmission on a fixed or predictable path. It usually uses physical media such as copper cables and optical fibers as carriers for signal transmission. These media have become the first choice for long-distance, high-quality data transmission due to their high bandwidth and low latency.

[0039] Wireless communication module, with its characteristics of no need for physical connection and flexibility and convenience, plays an irreplaceable role in the fields of mobile communications, Internet of Things, and remote monitoring. This module uses electromagnetic waves as a transmission medium to achieve wireless connection and data exchange between devices;

[0040] The communication protocol converter, as a key bridge connecting wired and wireless communication modules, is responsible for the conversion and adaptation between different communication protocols to ensure that information can flow smoothly between different networks. Due to the different standards of wired and wireless communication, there are technical barriers to direct interconnection. The communication protocol converter parses the source data format and converts it into a format supported by the target network, thus realizing cross-network and cross-protocol data interoperability.

[0041] Preferably, the intelligent control algorithm uses a fuzzy control algorithm to optimize the grid connection process and a neural network algorithm to diagnose and predict faults.

[0042] Preferably, the fault information includes: fault occurrence time, fault type, fault location, and fault level.

[0043] Preferably, the monitoring center includes a data receiving and processing unit, a fault diagnosis and prediction unit, a remote control unit and a user interface.

[0044] Preferably, the grid connection condition is determined by judging the operating status of the new energy power generation system and the grid parameters to ensure that the grid connection operation is performed when the grid connection conditions are met, otherwise the off-grid operation is performed.

[0045] Compared with the prior art, the present invention provides a new energy grid connection method applied to a new energy power generation system, which has the following beneficial effects:

[0046] 1. This new energy grid-connected method applied to the new energy power generation system, in order to improve the efficiency of energy conversion and grid connection, realizes accurate AC-DC conversion through high-performance grid-connected inverter, greatly reduces energy loss, improves conversion efficiency, removes harmonics and noise through deep filtering, ensures that the power quality meets the standards, reduces grid interference, and then improves energy conversion and grid connection efficiency.

[0047] 2. This new energy grid-connected method applied to the new energy power generation system, in order to enhance the stability and security of the power grid, ensures that parameters such as voltage and current adapt to the power grid demand and improve the stability of the power grid through refined power regulation and intelligent boost processing, seamless grid connection judgment connection and synchronous operation strategy, so that the new energy power generation system and the power grid can operate synchronously, reduce fluctuations, and have a rapid fault response and instant reporting mechanism to ensure the safety of the power grid and reduce the impact of faults.

[0048] 3. The new energy grid-connected method applied to the new energy power generation system, for intelligent operation and maintenance and optimization, the real-time monitoring system is combined with intelligent algorithms to achieve adaptive adjustment and optimized operation, improve the overall efficiency of the system, intelligently optimize the grid-connected process, and adopt advanced control algorithms such as fuzzy control and neural networks to improve conversion efficiency, reduce maintenance costs, and enhance system stability. The efficient communication system supports instant reporting of fault information, which facilitates rapid response by operation and maintenance personnel and improves operation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A flow chart of steps of the present invention as a whole;

[0050] Figure 2 It is a schematic diagram of the grid-connected inverter of the present invention;

[0051] Figure 3 This is a schematic diagram of the inverter body of the present invention;

[0052] Figure 4 It is a schematic diagram of a control unit of the present invention;

[0053] Figure 5 It is a schematic diagram of the heat dissipation system of the present invention;

[0054] Figure 6 It is a schematic diagram of the real-time monitoring system of the present invention;

[0055] Figure 7 A schematic diagram of a communication system of the present invention;

[0056] Figure 8 This is a schematic diagram of fault information of the present invention;

[0057] Fig. 9 A schematic diagram of a data receiving and processing unit of the present invention;

[0058] Fig.10 It is a flow chart of some steps of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] See also Figure 1 - Fig.10 , the present invention provides a technical solution:

[0061] A new energy grid-connected method applied to a new energy power generation system comprises the following steps:

[0062] S1. High-efficiency AC / DC conversion: the electric energy directly generated by the new energy power generation system (such as solar photovoltaic panels, wind turbines, etc.) is accurately converted to AC / DC through high-performance grid-connected inverters to ensure that the energy loss during the conversion process is minimized while improving the conversion efficiency;

[0063] S2. Deep filtering: Strictly filter the DC power output by the inverter, use advanced filtering technology to remove harmonics and noise in the current, ensure that the power quality meets the grid connection standard, and reduce interference with the public power grid. Deep filtering uses LC filters to filter the DC power. By adjusting the filter parameters, high-frequency noise in the DC power can be filtered out. The cutoff frequency calculation formula of the LC low-pass filter is usually expressed as:

[0064]

[0065] Where fc is the filter cutoff frequency, L is the inductance value (unit: Henry, H), C is the capacitance value (unit: Farad, F), and 2π is a constant representing twice the pi, π;

[0066] By adjusting the values ​​of L and C, fc can be flexibly controlled to ensure that high-frequency noise is effectively filtered out while keeping the DC component basically unaffected;

[0067] S3. Fine-grained power control: using high-precision power electronic equipment to fine-tune the filtered DC power, including precise control of parameters such as voltage, current, and power factor, to meet the needs of different grid access conditions;

[0068] S4, intelligent boost processing, through the intelligently controlled grid-connected transformer, the regulated DC power is boosted to ensure that the voltage level meets the access requirements of the public power grid. This process is combined with the real-time monitoring system to dynamically adjust the boost ratio to adapt to grid fluctuations. The grid-connected transformer adopts a dry-type transformer with the following technical parameters: rated capacity not less than 100kVA; rated voltage is 10kV; insulation grade is F. The grid-connected condition judgment is to judge the operating status of the new energy power generation system and the grid parameters to ensure that the grid-connected operation is carried out when the grid-connected conditions are met, otherwise the off-grid operation is carried out;

[0069] S5, seamless grid connection judgment connection, after the boost is completed, the grid connection condition judgment is carried out, and a highly reliable grid connection switch is used to achieve seamless connection between the new energy power generation system and the public power grid, ensuring a smooth and fast grid connection process;

[0070] S6, synchronous operation strategy, through advanced synchronous control technology, the new energy power generation system and the public power grid can be synchronized to ensure that the power output after grid connection is coordinated with the grid demand and improve the overall stability of the grid;

[0071] S7, intelligent monitoring and optimization, the real-time monitoring system continuously monitors the operation status of the grid-connected system in all aspects, combines machine learning, artificial intelligence and other advanced algorithms to achieve adaptive adjustment and optimized operation of the system, accurately predicts output power, and dynamically adjusts the power generation strategy according to the actual needs of the power grid, effectively reducing grid-connected fluctuations and uncertainties, and improving the overall efficiency of the system. The real-time monitoring system includes: current sensors, voltage sensors, temperature sensors, and data acquisition and processing units;

[0072] S8, fast response to faults. Once a fault occurs in the grid-connected system, the automatic protection mechanism is immediately triggered to quickly cut off the connection with the public power grid to prevent the fault from expanding and ensure the safety of the power grid;

[0073] S9. Real-time reporting of fault information. Through an efficient communication system, fault information is sent to the remote monitoring center in real time, which is convenient for operation and maintenance personnel to quickly locate the problem and take corresponding measures. The fault information includes: fault occurrence time, fault type, fault location, and fault level. The communication system adopts a combination of wired and wireless methods, including:

[0074] Wired communication module, as the basic part of the communication system, is mainly responsible for efficient and stable data transmission on a fixed or predictable path. It usually uses physical media such as copper cables and optical fibers as carriers for signal transmission. These media have become the first choice for long-distance, high-quality data transmission due to their high bandwidth and low latency.

[0075] Wireless communication modules, with their characteristics of no need for physical connection and flexibility and convenience, play an irreplaceable role in mobile communications, the Internet of Things, remote monitoring and other fields. This module uses electromagnetic waves (such as radio waves, microwaves, etc.) as transmission media to achieve wireless connection and data exchange between devices. With the continuous development of wireless communication technologies such as 5G, Wi-Fi 6, LoRa, and NB-IoT, wireless communication modules have made significant progress in transmission rate, coverage, power consumption management, etc., further promoting the implementation of application scenarios such as the Internet of Things and smart cities;

[0076] The communication protocol converter, as a key bridge connecting wired and wireless communication modules, is responsible for the conversion and adaptation between different communication protocols to ensure that information can flow smoothly between different networks. Due to the different standards of wired and wireless communication, there are technical barriers to direct interconnection. The communication protocol converter parses the source data format and converts it into a format supported by the target network, thus achieving cross-network and cross-protocol data intercommunication. This function is of great significance for building heterogeneous network integration and improving the overall communication efficiency of the system.

[0077] S10. Intelligently optimize the grid-connected process. Continuously adopt and update intelligent control algorithms to comprehensively optimize the grid-connected process. The intelligent control algorithm uses fuzzy control algorithms to optimize the grid-connected process and uses neural network algorithms to diagnose and predict faults, including but not limited to improving conversion efficiency, reducing maintenance costs, and enhancing system stability, to ensure that the new energy power generation system can continuously and efficiently provide clean energy to the public power grid.

[0078] Furthermore, the grid-connected inverter comprises:

[0079] Inverter body:

[0080] The power conversion module, whose core components use IGBT (insulated gate bipolar transistor) or other advanced semiconductor switching devices, is responsible for efficiently converting direct current (DC) into alternating current (AC) with the same frequency and phase as the power grid;

[0081] Filter circuit, used to smooth the AC waveform output by the inverter, reduce harmonic content, improve power quality, and ensure compliance with grid access standards;

[0082] Isolation transformers provide electrical isolation to protect the grid and user equipment from potential faults and help achieve voltage level matching;

[0083] Control unit:

[0084] The microprocessor or DSP (digital signal processor), as the brain, is responsible for receiving sensor data, executing control algorithms, and adjusting the inverter working state to achieve maximum power point tracking (MPPT), grid synchronization, fault detection and protection, etc.

[0085] Communication interface, supporting multiple communication protocols (such as Modbus, CAN, Ethernet, etc.), facilitating remote monitoring, data logging and integration with other smart devices (such as photovoltaic array monitors, energy storage systems);

[0086] User interface, including display screen and buttons, used to set parameters locally, view operating status and fault information;

[0087] Cooling System:

[0088] The heat sink and fan effectively dissipate the heat generated by the electronic components inside the inverter by increasing the heat dissipation area and forced convection, ensuring the stability and reliability of the equipment under long-term high-load operation;

[0089] Intelligent temperature control system automatically adjusts the fan speed according to the internal temperature of the inverter, ensuring heat dissipation and saving energy;

[0090] Dust-proof and waterproof design uses special materials and sealing structure to prevent dust and water vapor from intruding and extend the service life of the equipment.

[0091] Furthermore, the monitoring center includes a data receiving and processing unit, a fault diagnosis and prediction unit, a remote control unit and a user interface. The data receiving and processing unit is the cornerstone of the monitoring center and is responsible for receiving data streams from various monitoring points, sensors or devices in real time. These data cover various types such as environmental parameters, equipment status, and operation logs. The unit uses efficient data processing algorithms to clean, integrate and preliminarily analyze these massive data, extract valuable information, and provide support for subsequent analysis and decision-making; the fault diagnosis and prediction unit uses advanced fault diagnosis technology and prediction algorithms based on the information provided by the data receiving and processing unit to conduct in-depth analysis of the monitored object. The unit can automatically Identify abnormal data, determine potential equipment failures or performance degradation problems, and issue early warnings through the study and analysis of historical data; the remote control unit gives the monitoring center powerful remote control capabilities. Through this unit, operators can remotely access and control the monitored objects and perform operations such as parameter adjustment, equipment start and stop, fault diagnosis and troubleshooting; the user interface is an interactive window between the monitoring center and the user. It adopts an intuitive and easy-to-use design to present complex data and monitoring information to the user in a graphical and visual manner. The user interface not only displays real-time monitoring images, equipment status, fault warnings and other information, but also allows users to easily understand the system operation status and perform necessary operations and management, thereby improving work efficiency and user experience.

[0092] In one embodiment of the present invention, the application scenario is: a large-scale solar photovoltaic power station needs to efficiently and stably integrate the electricity it generates into the public power grid.

[0093] Specific steps:

[0094] High-efficiency conversion of AC and DC: It uses a high-performance grid-connected inverter, the core of which is the IGBT power conversion module, which efficiently converts the DC power generated by the photovoltaic panels into AC power with the same frequency and phase as the power grid;

[0095] Deep filtering: The inverter has a built-in LC filter, which can filter out high-frequency noise and harmonics in the AC power by accurately adjusting the values ​​of the inductor L and the capacitor C, ensuring that the power quality meets the grid-connected standards;

[0096] Refined power control: Use high-precision power electronic equipment to accurately control the voltage, current, and power factor of filtered AC power to achieve maximum power point tracking (MPPT);

[0097] Intelligent boost processing: Adopt intelligently controlled dry-type grid-connected transformer (rated capacity 150kVA, rated voltage 10kV, insulation grade F), and dynamically adjust the boost ratio in combination with the real-time monitoring system to ensure that the voltage level meets the grid access requirements;

[0098] Seamless grid connection judgment: After the boost is completed, the grid connection condition is judged through the grid-connected switch, including checking parameters such as voltage, frequency, phase difference, etc., to ensure seamless connection after synchronization with the grid;

[0099] Synchronous operation strategy: using advanced synchronous control technology to keep the photovoltaic power station and the power grid running synchronously to ensure the stability of the power grid;

[0100] Intelligent monitoring and optimization: Deploy a real-time monitoring system, including current, voltage, and temperature sensors, combined with machine learning algorithms to adaptively adjust and optimize the grid-connected system, predict output power, and dynamically adjust the power generation strategy;

[0101] Rapid fault response and reporting: Once a fault is detected, the automatic protection mechanism is immediately triggered to cut off the connection, and the fault information (including fault time, type, location, and level) is reported to the remote monitoring center in real time through a combined wired and wireless communication system;

[0102] Intelligent optimization of the grid connection process: Continuously adopt and update the fuzzy control algorithm to optimize the grid connection process, and use the neural network algorithm for fault diagnosis and prediction;

[0103] In one embodiment of the present invention, the application scenario is: an offshore wind farm, which needs to safely and stably integrate the electric energy generated by the wind turbines into the power grid.

[0104] Specific steps:

[0105] Efficient AC / DC conversion: Since wind turbines directly generate AC power, this step focuses on optimizing power quality, with voltage and frequency fine-tuning performed through specially designed grid-connected inverters;

[0106] Deep filtering: Use high-performance filtering circuits to further reduce harmonics and noise in AC power to ensure power quality;

[0107] Refined power control: Use high-precision power electronic equipment to precisely control voltage, current, and power factor to adapt to grid fluctuations;

[0108] Intelligent boost processing: Use intelligently controlled grid-connected transformers (select technical parameters based on actual needs), combined with a real-time monitoring system, to dynamically adjust the boost ratio to ensure that the voltage level meets grid requirements;

[0109] Seamless grid-connection judgment connection: Through highly reliable grid-connection switches, seamless connection is achieved after confirming that the status of the power grid and power generation system meet the grid-connection conditions;

[0110] Synchronous operation strategy: Use advanced synchronous control technology to ensure that the wind power generation system and the power grid operate synchronously and improve the stability of the power grid;

[0111] Intelligent monitoring and optimization: deploy a comprehensive real-time monitoring system, combined with artificial intelligence algorithms, to optimize the operation of the grid-connected system and achieve adaptive regulation;

[0112] Rapid response and reporting of faults: Establish a rapid response mechanism to immediately cut off the connection once a fault is detected, and report the fault information to the remote monitoring center through the communication system;

[0113] Intelligent optimization of the grid-connected process: Continuously adopt and update intelligent control algorithms to comprehensively optimize the grid-connected process and improve grid-connected efficiency and stability.

[0114] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A new energy grid-connected method applied to a new energy power generation system, characterized in that The following steps are involved: S1. High-efficiency AC / DC conversion: the electric energy directly generated by the new energy power generation system is accurately converted from AC to DC through a high-performance grid-connected inverter; S2. Deep filtering: strictly filter the DC power output by the inverter, use advanced filtering technology to remove harmonics and noise in the current, and ensure that the power quality meets the grid-connected standards; S3, fine power control, using high-precision power electronic equipment to finely control the filtered DC power, including precise control of voltage, current, and power factor parameters; S4, intelligent boost processing, through the intelligently controlled grid-connected transformer, the regulated DC power is boosted to ensure that the voltage level meets the access requirements of the public power grid. This process is combined with the real-time monitoring system to dynamically adjust the boost ratio to adapt to grid fluctuations; S5, seamless grid connection judgment connection, after the boost is completed, the grid connection condition judgment is carried out, and a highly reliable grid connection switch is used to achieve seamless connection between the new energy power generation system and the public power grid; S6, synchronous operation strategy, through advanced synchronous control technology, the new energy power generation system and the public power grid can achieve synchronous operation; S7, intelligent monitoring and optimization, the real-time monitoring system continuously monitors the operation status of the grid-connected system in all aspects, combines intelligent algorithms to achieve adaptive adjustment and optimized operation of the system, accurately predicts output power, and dynamically adjusts the power generation strategy according to the actual needs of the power grid; S8, fast response to faults. Once a fault occurs in the grid-connected system, the automatic protection mechanism is immediately triggered to quickly cut off the connection with the public grid; S9, Fault information is reported immediately, and the fault information is sent to the remote monitoring center in real time through an efficient communication system; S10, intelligently optimize the grid-connected process, continuously adopt and update intelligent control algorithms, and comprehensively optimize the grid-connected process.

2. A new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The grid-connected inverter includes: Inverter body: The power conversion module, whose core components use IGBT (insulated gate bipolar transistor) or other advanced semiconductor switching devices, is responsible for efficiently converting direct current (DC) into alternating current (AC) with the same frequency and phase as the power grid; Filter circuit, used to smooth the AC waveform output by the inverter, reduce harmonic content, improve power quality, and ensure compliance with grid access standards; Isolation transformers provide electrical isolation to protect the grid and user equipment from potential faults and help achieve voltage level matching; Control unit: microprocessor or DSP (digital signal processor), as the brain, responsible for receiving sensor data, executing control algorithms, and adjusting the inverter working state to achieve maximum power point tracking (MPPT), grid synchronization, fault detection and protection functions; communication interface, supporting multiple communication protocols, facilitating remote monitoring, data logging and integration with other smart devices (such as photovoltaic array monitors, energy storage systems); user interface, including display screen and buttons, for local setting of parameters, viewing of operating status and fault information; Cooling system: The heat sink and fan effectively dissipate the heat generated by the electronic components inside the inverter by increasing the heat dissipation area and forced convection, ensuring the stability and reliability of the equipment under long-term high-load operation; the intelligent temperature control system automatically adjusts the fan speed according to the internal temperature of the inverter, ensuring the heat dissipation effect and saving energy; the dust-proof and waterproof design uses special materials and sealing structure to prevent dust and water vapor from intruding, extending the service life of the equipment.

3. A new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: Deep filtering uses LC filters to filter direct current. By adjusting the filter parameters, high-frequency noise in direct current can be filtered out. The cutoff frequency calculation formula of the LC low-pass filter is usually expressed as: Among them, fc is the cutoff frequency of the filter, L is the inductance value (unit: Henry, H), C is the capacitance value (unit: Farad, F), and 2π is a constant, which means twice the pi, π. By adjusting the values ​​of L and C, fc can be flexibly controlled to ensure that high-frequency noise is effectively filtered out while keeping the DC component basically unaffected.

4. A new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The grid-connected transformer adopts a dry-type transformer with the following technical parameters: rated capacity is not less than 100kVA; rated voltage is 10kV; insulation grade is F.

5. The new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The real-time monitoring system includes: current sensor, voltage sensor, temperature sensor and data acquisition and processing unit.

6. A new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The communication system adopts a combination of wired and wireless methods, including: a wired communication module, a wireless communication module and a communication protocol converter.

7. The new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The intelligent control algorithm uses fuzzy control algorithm to optimize the grid connection process and uses neural network algorithm to diagnose and predict faults.

8. A new energy grid connection method applied to a new energy power generation system according to claim 7, characterized in that: Fault information includes: fault occurrence time, fault type, fault location, and fault level.

9. The new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The monitoring center includes a data receiving and processing unit, a fault diagnosis and prediction unit, a remote control unit and a user interface.

10. The new energy grid connection method applied to a new energy power generation system according to claim 1, characterized in that: The grid connection condition judgment determines the operating status of the new energy power generation system and the grid parameters to ensure that the grid connection operation is carried out when the grid connection conditions are met, otherwise the off-grid operation is carried out.

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