Biomass biogas and wind power integration intelligent regulation and control equipment

Abstract

The invention discloses biomass biogas and wind power grid-connected intelligent regulation and control equipment, which relates to the technical field of renewable energy sources and comprises a multi-energy access module, an intelligent regulation and control host module, an energy storage buffer module, a grid-connected interface module and a safety protection module. The multi-energy access module completes electric energy access and detection through a biogas / wind power access unit, a rectification filtering unit and a Hall sensor, the intelligent regulation and control host takes a main controller as a core, is internally provided with an optimization scheduling algorithm and a power prediction model, and is matched with a dual-mode communication and man-machine interaction module to realize output regulation and remote management and control; the energy storage buffer module adopts a lithium battery pack, the battery management and charge-discharge control unit is matched with the host for current stabilization, the grid-connected interface module completes voltage frequency synchronization, electric energy metering and power grid butt joint, the safety protection module covers overvoltage and undervoltage protection, overcurrent and short circuit protection, anti-islanding protection and lightning protection protection, and safe and stable operation of equipment and the power grid is comprehensively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of renewable energy technology, specifically to an intelligent control device for grid connection of biomass biogas and wind power. Background Technology

[0002] Biomass biogas power generation and wind power generation are two highly promising forms of renewable energy, occupying an important position in the energy supply system. Biomass biogas power generation relies on renewable raw materials such as agricultural waste and livestock manure, and has the advantages of stable output and neutral carbon emissions, enabling resource recycling; while wind power generation, with its clean and abundant reserves, has become one of the mainstays of new energy power generation.

[0003] However, biomass biogas power generation suffers from low single-unit power output and limited energy density, making it difficult to achieve large-scale power supply capacity when connected to the grid alone. Wind power generation, on the other hand, is significantly affected by natural wind conditions, exhibiting inherent defects such as large output fluctuations and high randomness. Direct grid connection can easily impact the voltage stability and frequency consistency of the public power grid, and even cause grid oscillations, equipment damage, and other safety hazards. Therefore, combining biomass biogas power generation with wind power generation to form a complementary power supply system, and using coordinated regulation to smooth wind power fluctuations and improve power supply stability, has become an important research direction in the field of new energy grid connection.

[0004] In existing technologies, most new energy grid-connected control equipment is designed for a single energy type, or although it can achieve multi-energy access, it lacks targeted collaborative scheduling mechanisms and precise control capabilities. Specifically, existing control equipment generally does not have built-in collaborative optimization algorithms adapted to the characteristics of biogas and wind power, and cannot dynamically allocate the output ratio according to the output characteristics of the two energy types. This makes it difficult to fully leverage the stability advantage of biogas power generation to mitigate wind power fluctuations. At the same time, the energy storage modules of some equipment have poor linkage with the control host, and can only achieve simple charging and discharging functions. They cannot cooperate with the control algorithm to achieve forward-looking buffering and compensation for output fluctuations, resulting in grid-connected power quality that fails to meet grid access standards. In addition, the parameter acquisition accuracy, control response speed, and multi-module collaborative security of existing equipment are insufficient, further limiting the grid-connected reliability and large-scale application of biomass biogas and wind power hybrid power supply systems. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent control device for grid connection of biomass biogas and wind power, in order to solve the problems of existing new energy grid connection control devices for mixed power supply scenarios of biomass biogas and wind power, such as lack of targeted collaborative scheduling mechanism, poor linkage between energy storage and control host, insufficient parameter acquisition and safety performance, resulting in poor coordination of multi-energy grid connection, poor fluctuation smoothing effect, and limiting the reliability and large-scale application of mixed energy system grid connection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent control device for grid connection of biomass biogas and wind power, comprising a multi-energy access module, an intelligent control host, an energy storage buffer module, a grid connection interface module, and a safety protection module; The output of the multi-energy access module is electrically connected to the input of the intelligent control host. The intelligent control host is bidirectionally electrically connected to the energy storage buffer module and the grid connection interface module. The safety protection module is electrically connected to the multi-energy access module, the intelligent control host, the energy storage buffer module, and the grid connection interface module. The multi-energy access module is adapted to access the power from biomass biogas power generation units and wind power generation units. The intelligent control host has a built-in algorithm to realize the coordinated intelligent scheduling and dynamic parameter adjustment of biomass biogas power and wind power. The grid connection interface module is connected to the public power grid, and the energy storage buffer module works in conjunction with the intelligent control host.

[0007] Preferably, the multi-energy access module includes a biogas power generation access unit, a wind power access unit, and a rectifier and filter unit. The output terminals of the biogas power generation access unit and the wind power access unit are electrically connected to the input terminal of the rectifier and filter unit, and the output terminal of the rectifier and filter unit is electrically connected to the input terminal of the intelligent control host. The biogas power generation access unit and the wind power access unit are each equipped with a voltage and current detection sensor, which is connected to the intelligent control host for signal transmission.

[0008] Preferably, the rectifier and filter unit includes a rectifier bridge and an LC filter circuit. The input terminal of the rectifier bridge is connected to the output terminal of the biogas power generation access unit and the wind power access unit. The output terminal of the rectifier bridge is connected to the input terminal of the LC filter circuit. The output terminal of the LC filter circuit is connected to the intelligent control host. The voltage and current detection sensor is a Hall sensor, which is connected to the rectifier and filter unit and the intelligent control host signals respectively.

[0009] Preferably, the intelligent control host includes a main controller, a power regulation unit, a data acquisition unit, and a communication transmission unit. The input terminal of the data acquisition unit is electrically connected to the multi-energy access module, the energy storage buffer module, and the grid connection interface module, respectively. The output terminal of the data acquisition unit is electrically connected to the input terminal of the main controller. The output terminal of the main controller is electrically connected to the input terminal of the power regulation unit. The power regulation unit is electrically connected to the multi-energy access module and the energy storage buffer module, respectively. The communication transmission unit is bidirectionally electrically connected to the main controller. The communication transmission unit adopts 5G and Ethernet dual-mode communication and is connected to a remote monitoring platform.

[0010] Preferably, the main controller has a built-in multi-objective optimization scheduling algorithm and a power prediction model. The multi-objective optimization scheduling algorithm configures the output ratio parameters of the two energy sources, and the power prediction model has built-in wind power fluctuation correlation parameters. The power regulation unit includes a bidirectional DC / DC converter and a DC / AC inverter. The bidirectional DC / DC converter is electrically connected to the energy storage buffer module, and the DC / AC inverter is electrically connected to the grid connection interface module.

[0011] Preferably, the intelligent control host further includes a human-machine interaction module, which is bidirectionally electrically connected to the intelligent control host. The human-machine interaction module includes a touch screen and status indicator lights; the touch screen is configured with parameter display and threshold setting functions, and the status indicator lights are configured with multi-color display modes.

[0012] Preferably, the energy storage buffer module includes an energy storage battery pack, a battery management unit, and a charge / discharge control unit. The charge / discharge control unit is bidirectionally electrically connected to both the energy storage battery pack and the intelligent control host. The battery management unit is electrically connected to the energy storage battery pack and communicates bidirectionally with the intelligent control host. The battery management unit monitors the SOC value, voltage, and temperature parameters of the energy storage battery pack. The battery management unit establishes a monitoring data transmission link with the intelligent control host, and the charge / discharge control unit receives control commands from the intelligent control host.

[0013] Preferably, the energy storage battery pack is a lithium battery pack, which is configured with high energy density and fast charge and discharge parameters; and the outer side of the energy storage battery pack is provided with a heat insulation shell. The charge and discharge control unit has a built-in charge and discharge threshold adjustment module, which can adjust the upper and lower limits of charge and discharge according to the instructions of the intelligent control host.

[0014] Preferably, the grid connection interface module includes a grid connection switch unit, a voltage and frequency synchronization unit, and an energy metering unit. The input terminal of the grid connection switch unit is electrically connected to the output terminal of the intelligent control host, and the output terminal of the grid connection switch unit is connected to the public power grid. The voltage and frequency synchronization unit is electrically connected to both the intelligent control host and the grid connection switch unit, and the voltage and frequency synchronization unit matches the grid voltage and frequency parameters. The energy metering unit is connected in series on the connection line between the grid connection switch unit and the public power grid to measure the total amount of energy connected to the grid and the real-time power.

[0015] Preferably, the safety protection module includes an over / under voltage protection unit, an overcurrent and short-circuit protection unit, an anti-islanding protection unit, and a lightning protection unit. The over / under voltage protection unit and the overcurrent and short-circuit protection unit are connected in series on the main power supply line. The over / under voltage protection unit and the overcurrent and short-circuit protection unit are configured with voltage and current safety threshold triggering mechanisms. The anti-islanding protection unit is electrically connected to the grid interface module and is configured with a grid fault linkage disconnection mechanism. The lightning protection unit is located at the grounding terminal of the equipment casing and is configured with a lightning current discharge path.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves significant optimization through targeted design. On the one hand, the wind power grid connection unit supports flexible installation and removal of units with a power range of 200kW-1000kW. Combined with the copper busbar connection design of the biomass biogas power generation unit, it takes into account the adaptability of units with different power levels and the stability of high current transmission, solving the problems of single access and cumbersome installation and maintenance of existing equipment. On the other hand, the CS100 Hall sensor is used to collect voltage and current signals in real time, providing accurate data support for rectification and filtering. Combined with the combination of high-efficiency silicon-based rectifier bridge and LC filter circuit, compared with the traditional rectification and filtering structure, it can more thoroughly filter out harmonic components, eliminate current fluctuations, and output smooth and stable DC power, which greatly improves the basic quality of power in subsequent control links and avoids the control deviation and grid impact risk caused by inadequate preprocessing in existing technologies.

[0017] This invention uses a built-in neural network power prediction model to predict wind power output fluctuations in advance, solving the problem of delayed response to sudden wind power changes in existing technologies. Combined with a multi-objective optimization scheduling algorithm, it dynamically allocates the output ratio based on the characteristics of stable biogas power generation and large wind power fluctuations. With the coordinated control of energy storage, compared with the traditional fixed ratio mode, it can maximize the efficient utilization value of biogas power generation and effectively smooth wind power fluctuations, ensuring stable total output. At the same time, the combination of dual-mode communication and local interaction takes into account the flexibility of remote control and the convenience of local operation. Compared with existing single-communication mode equipment, the control coverage is more comprehensive and the command transmission is more reliable, further improving the efficiency of multi-energy coordinated operation.

[0018] This invention's energy storage unit achieves high-precision monitoring of ±0.01V through a battery management unit, and maintains an optimal operating temperature of 15-35℃ with a polyurethane heat-insulating shell. Compared to traditional energy storage modules, it can accurately control battery status, avoid the impact of temperature drift, and ensure high battery energy density and charge / discharge stability. The safety protection module runs through the entire process, with precise thresholds for over-voltage, under-voltage, over-current, and short-circuit protection. Combined with anti-islanding protection and lightning protection mechanisms, compared to existing single protection devices, it can comprehensively prevent various risks such as voltage anomalies, short circuits, grid failures, and lightning strikes. It can prevent equipment burnout, battery failures, and impacts on the public power grid. At the same time, the linkage response between energy storage and intelligent control host, compared to the existing design where energy storage and control are disconnected, can quickly adapt to changes in power supply and demand, further improving the stability of grid-connected power and the safety of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the human-computer interaction module in this invention; Figure 3 This is a partial structural diagram of the multi-energy access module in this invention; Figure 4 This is a partial structural schematic diagram of the energy storage buffer module in this invention; Figure 5 This is a partial structural diagram of the safety protection module in this invention; Figure 6 This is a partial structural diagram of the grid connection interface module in this invention.

[0020] Reference numerals: 1. Multi-energy access module; 2. Intelligent control host; 3. Energy storage buffer module; 4. Grid connection interface module; 5. Safety protection module; 6. Over / under voltage protection unit; 7. Overcurrent / short circuit protection unit; 8. Anti-islanding protection unit; 9. Lightning protection unit; 10. Human-machine interaction module; 11. Biogas power generation access unit; 12. Wind power access unit; 13. Rectifier and filter unit; 14. Voltage and current detection sensor; 15. Main controller; 16. Power regulation unit; 17. Data acquisition unit; 18. Communication transmission unit; 19. Energy storage battery pack; 20. Battery management unit; 21. Charge and discharge control unit; 22. Grid connection switch unit; 23. Voltage and frequency synchronization unit; 24. Energy metering unit; 25. LC filter circuit; 26. Bidirectional DC / DC converter; 27. DC / AC inverter; 28. Touch screen display; 29. ​​Status indicator light; 30. Heat-insulating shell; 31. Rectifier bridge. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-6As shown, the present invention provides a technical solution: an intelligent control device for grid connection of biomass biogas and wind power, specifically including a multi-energy access module 1, an intelligent control host 2, an energy storage buffer module 3, a grid connection interface module 4, and a safety protection module 5. The connection relationship of each module is fixed and: the output end of the multi-energy access module 1 is electrically connected to the input end of the intelligent control host 2; the intelligent control host 2 establishes bidirectional electrical connections with the energy storage buffer module 3 and the grid connection interface module 4 respectively; the safety protection module 5 is electrically connected to the multi-energy access module 1, the intelligent control host 2, the energy storage buffer module 3, and the grid connection interface module 4 respectively; the intelligent control host 2 also integrates a human-machine interaction module 10, and the human-machine interaction module 10 establishes a fixed bidirectional electrical connection with the intelligent control host 2, forming a complete control system.

[0023] In this invention, the multi-energy access module 1 includes a biogas power generation access unit 11, a wind power access unit 12, and a rectifier and filter unit 13. The output terminals of the biogas power generation access unit 11 and the wind power access unit 12 are both connected to the input terminal of the rectifier and filter unit 13, and the output terminal of the rectifier and filter unit 13 is connected to the input terminal of the intelligent control host 2.

[0024] In this embodiment, to adapt to the access requirements of different new energy units, the biogas power generation access unit 11 adopts a copper busbar connection method, which can stably adapt to biomass biogas generator sets with a power range of 100kW-500kW, ensuring the reliability of high current transmission; the wind power access unit 12 adopts an aviation plug interface, which has waterproof and dustproof characteristics and supports the rapid docking and disassembly of 200kW-1000kW wind turbine generator sets. The rectifier and filter unit 13 is composed of a rectifier bridge 31 and an LC filter circuit 25 connected in series. The rectifier bridge 31 uses a high-efficiency silicon-based rectifier device, which can accurately convert the AC power output from the two new energy sources into DC power; the inductance value of the LC filter circuit 25 is set to 10mH and the capacitance value is set to 1000μF, which can effectively filter out the harmonic components in the rectified DC power and ensure the smoothness of the output power. Meanwhile, both the biogas power generation access unit 11 and the wind power access unit 12 are equipped with voltage and current detection sensors 14. These sensors are all CS100 Hall sensors. The Hall sensors establish bidirectional signal connections with the rectifier and filter unit 13 and the intelligent control host 2, respectively. They can accurately collect the voltage and current signals of the two power generation units and transmit them synchronously to the subsequent modules to provide data support for control decisions.

[0025] The present invention provides an intelligent control host 2 comprising a main controller 15, a power adjustment unit 16, a data acquisition unit 17, a communication transmission unit 18, and a human-computer interaction module 10.

[0026] In this embodiment, the main controller 15 uses a heterogeneous chip, model ZYNQ-7000, which combines the high-speed parallel processing capability of FPGA with the embedded control capability of ARM. It has a built-in power prediction model based on neural networks and a multi-objective optimization scheduling algorithm. The multi-objective optimization scheduling algorithm presets the output ratio configuration parameters of the two energy sources, and can dynamically allocate the output ratio of the two according to the characteristics of strong stability of biogas power generation and large fluctuation of wind power output. The power prediction model presets wind power fluctuation correlation parameters, which can predict the trend of wind power output change in advance and realize forward-looking regulation. The power regulation unit 16 consists of a bidirectional DC / DC converter 26 and a DC / AC inverter 27. The bidirectional DC / DC converter 26 is a module of model XL6019, with an output voltage range of 0-600V. It is connected to the energy storage buffer module 3 to realize precise regulation of the charging and discharging power of the energy storage module. The DC / AC inverter 27 is an inverter of model SPWM-1000, with an output frequency stable at 50Hz±0.1Hz. It is connected to the grid interface module 4 to convert DC power into AC power that conforms to the grid standard. The data acquisition unit 17 uses an 8-channel data acquisition chip, model AD7606, with a sampling rate of 1MHz. Its input terminals are respectively connected to the multi-energy access module 1, the energy storage buffer module 3, and the grid connection interface module 4, and its output terminal is connected to the main controller 15. It can simultaneously acquire the operating parameters of each module and transmit them at high speed. The communication transmission unit 18 adopts dual-mode communication of 5G and Ethernet, using a model EC20 5G module and a model DM9000 Ethernet module to establish a stable communication link with the remote monitoring platform, realizing remote monitoring of equipment operating status and remote issuance of control commands, balancing wireless flexibility and wired reliability.

[0027] In this invention, the human-machine interaction module 10 includes a touch screen display 28 and status indicator lights 29. In this embodiment, a TFT-10.1 touch screen display 28 is selected, which integrates parameter display and control threshold setting functions. It can display core parameters such as output power, voltage, current, and energy storage SOC value of the two energy sources in real time, and supports manual touch setting of control thresholds. The status indicator lights 29 are equipped with 4 LEDs and adopt a multi-color light display mechanism, namely green operation light, red fault light, yellow grid connection light, and blue energy storage light, corresponding to four core states: normal operation of equipment, fault alarm, grid connection ready, and energy storage charging and discharging, which intuitively reflects the operating status of the equipment.

[0028] In this invention, the energy storage buffer module 3 and the intelligent control host 2 form a fixed cooperative relationship to smooth out the fluctuations in the output of new energy sources. The module consists of an energy storage battery pack 19, a battery management unit 20, and a charge and discharge control unit 21.

[0029] In this embodiment, the energy storage battery pack 19 uses 18650 lithium batteries with high energy density and fast charge / discharge parameters. Each battery cell has a capacity of 2000mAh, and they are connected in series to form a 100-cell module, providing a total capacity of 200Ah. A heat-insulating outer shell 30 is fixedly installed on the outside of the energy storage battery pack 19. The shell uses polyurethane insulation material with a thickness of 50mm, effectively maintaining the battery operating temperature between 15-35℃ and ensuring stable battery performance. The battery management unit 20 is a BMS-60 module, directly connected to the energy storage battery pack 19, and establishes fixed bidirectional communication with the intelligent control host 2. It can monitor the individual cell voltage, total voltage, SOC value, and battery temperature of the 16-cell battery pack with a measurement accuracy of ±0.01V. A dedicated monitoring and data transmission link is established with the intelligent control host 2 to synchronously report battery status. The charge and discharge control unit 21 uses an STM25F103 microcontroller as its control core and has a built-in fixed charge and discharge threshold adjustment module. It can only adjust the upper and lower limits of the charge and discharge current within the range of 0-500A according to the control instructions issued by the intelligent control host 2, so as to avoid overcharging and over-discharging of the battery.

[0030] The present invention provides a grid connection interface module 4 for connecting to the public power grid, which comprises a grid connection switch unit 22, a voltage and frequency synchronization unit 23, and an energy metering unit 24.

[0031] In this embodiment, the grid-connected switch unit 22 uses a VS1-12 intelligent reclosing circuit breaker with a rated current of 610A. Its input terminal is connected to the output terminal of the intelligent control host 2, and its output terminal is connected to the public power grid, enabling rapid switching of the grid-connected circuit and automatic reclosing in case of faults. The voltage and frequency synchronization unit 23 uses a SYN5601 synchronization detection module, which is connected to both the intelligent control host 2 and the grid-connected switch unit 22. It can accurately match the voltage and frequency standard parameters of the public power grid with a synchronization accuracy of ±1μs, ensuring that the electrical energy and grid parameters are completely consistent after regulation before grid connection. The electricity metering unit 24 is connected in series on the connection line between the grid-connected switch unit 22 and the public power grid. It uses a DTZ341 bidirectional smart meter with a metering accuracy of 0.2 class, specifically used to measure the total amount of electricity connected to the grid and the real-time power, providing accurate data for electricity billing.

[0032] In this invention, the safety protection module 5 provides comprehensive safety protection for the entire device, and consists of an over / under voltage protection unit 6, an overcurrent and short circuit protection unit 7, an anti-islanding protection unit 8, and a lightning protection unit 9.

[0033] In this embodiment, the over / under voltage protection unit 6 and the overcurrent / short circuit protection unit 7 are connected in series on the main power supply line. Both use RT18 fuses and MCB circuit breakers for dual protection. The over / under voltage protection unit 6 is equipped with a fixed voltage and current safety threshold triggering mechanism. The voltage threshold is set to ±5% of the rated voltage. When the line voltage exceeds the threshold range, the line is quickly disconnected. The overcurrent / short circuit protection unit 7 has an overcurrent threshold set to 1.2 times the rated current. It operates immediately in the event of an overcurrent or short circuit fault to prevent equipment damage and grid impact. The anti-islanding protection unit 8 is directly connected to the grid connection interface module 4 and uses an FD-200 anti-islanding protection device. It has a built-in grid fault linkage disconnection triggering mechanism to promptly disconnect the grid connection when a grid fault occurs, preventing the formation of an isolated grid and the resulting safety hazards. The lightning protection unit 9 is fixedly installed at the grounding terminal of the equipment casing. It adopts a composite surge protector of model SPD-20, with a preset dedicated discharge path for lightning current. The nominal discharge current is 20kA, which can effectively discharge lightning impulse current and protect the internal circuits of the equipment from lightning damage.

[0034] The overall effect achieved by the organization is as follows: The process begins with multi-energy access and pre-processing, completing the compliant access, real-time monitoring, and preliminary energy purification of biomass biogas power and wind power. The biomass biogas generator sets achieve stable access through biogas power generation access unit 11, with a copper busbar connection design ensuring reliable high-current transmission. Wind turbine generator sets are quickly connected through wind power access unit 12, supporting flexible installation and removal of units ranging from 200kW to 1000kW to meet on-site wind power installation and maintenance needs. Both access units are equipped with CS100 Hall effect sensors (voltage and current detection sensors 14) to collect the voltage and current signals output by the generator sets in real time and simultaneously transmit the data to the intelligent control host 2. The collection unit 17 and the rectifier-filter unit 13 provide raw data for control decisions and a basis for adapting the rectification and filtering process. Subsequently, the two sources of new energy power are first input into the rectifier-filter unit 13, where the high-efficiency silicon-based rectifier bridge 31 precisely converts the AC power into DC power. Then, the LC filter circuit 25 filters out harmonic components in the DC power, eliminating current fluctuations and outputting smooth and stable DC power, which is finally delivered to the intelligent control host 2 to ensure the power quality of subsequent control stages. Next, it enters the intelligent control core scheduling stage, where the intelligent control host 2 coordinates the data from each module and uses built-in algorithms to achieve power distribution, power regulation, remote linkage, and local interaction, realizing an intelligent closed-loop system of "prediction-control-feedback". The data acquisition unit 17 synchronously collects filtered power parameters from the multi-energy access module 1, battery status parameters from the energy storage buffer module 3, and grid-side parameters from the grid connection interface module 4, transmitting all data at high speed to the main controller 15. The main controller 15 achieves precise control through a built-in dual-core algorithm. The first is a power prediction model based on a neural network, combined with preset wind power fluctuation correlation parameters, to predict the changing trend of wind power output (such as power fluctuations caused by sudden changes in wind speed). The second is a multi-objective optimization scheduling algorithm, which dynamically allocates the output ratio of the two energy sources based on the characteristics of strong stability of biogas power generation and large fluctuations of wind power, prioritizing the efficient utilization of biogas power generation, while simultaneously mitigating wind power fluctuations through energy storage. The main controller 15 then sends instructions to the power regulation unit 16 based on the scheduling results. The bidirectional DC / DC converter 26 connects to the energy storage buffer module 3 to adjust the charging and discharging power of the energy storage battery. The DC / AC inverter 27 converts the regulated DC power into AC power that meets the standards of the public power grid to prepare for grid connection. The human-machine interaction module 10 displays the core parameters such as the output power of the two energy sources, the energy storage SOC value, and the grid connection status in real time. It supports manual touch setting of the control threshold. The communication transmission unit 18 establishes a link with the remote monitoring platform through dual-mode communication to realize remote monitoring of the equipment's operating status and remote issuance of control instructions, taking into account both wireless flexibility and wired reliability.Meanwhile, the energy storage buffer module 3, as a cooperating unit of the intelligent control host 2, synchronously carries out energy storage buffering and smoothing work. Its function is to smooth wind power output fluctuations, balance power supply and demand, ensure the stability of power connected to the grid, and ensure the safe operation of energy storage batteries. The battery management unit 20 monitors the operating parameters of the 18650 lithium battery pack 19 in real time, including individual cell voltage, total voltage, remaining capacity, and battery temperature, with a measurement accuracy of ±0.01V. The monitoring data is synchronized to the intelligent control host 2 through a dedicated data link for charging and discharging. The polyurethane thermal insulation shell 30 on the outside of the lithium battery pack provides a basis for regulation, maintaining the battery's operating temperature between 15-35℃, ensuring stable performance of the battery's high energy density and rapid charge / discharge capabilities. The charge / discharge control unit 21 receives instructions from the intelligent control host 2 and adjusts the upper and lower limits of the charge / discharge current through the built-in threshold adjustment module. When wind power output is excessive and the total power exceeds the grid connection demand, the host instructs the energy storage module to charge and store the excess power. When wind power output is insufficient and the total power cannot meet the grid connection demand, the host instructs the energy storage module to discharge and replenish the power. When there is a power shortage and the output of both energy sources is stable, the energy storage module is in standby mode, ready to respond to control commands at any time. Then it enters the grid connection and power metering stage to achieve accurate matching and safe grid connection of the controlled power with the public grid. At the same time, it completes power metering to provide accurate data for power settlement. The voltage and frequency synchronization unit 23 is connected to the intelligent control host 2 and the grid connection switch unit 22 respectively. It accurately detects the voltage and frequency standard parameters of the public grid and adjusts them to match the AC power output of the inverter with the grid parameters. The synchronization accuracy reaches ±1μs, avoiding the impact on the grid caused by parameter mismatch. After the parameter synchronization is completed, the grid connection switch unit 22 receives the host command to close the switch, realizing the connection of the controlled power to the public grid. If a grid fault or abnormal power parameters are detected later, the switch can be quickly disconnected. It also supports the automatic reclosing function for faults to improve grid connection reliability. The power metering unit 24 is connected in series between the grid connection switch and the public grid to measure the total amount of power connected to the grid and the real-time power. The data can be synchronized to the local touch screen and the remote monitoring platform to provide accurate basis for the settlement of new energy power.Safety protection module 5 runs throughout the entire equipment operation process, using a multi-dimensional protection mechanism to prevent various electrical faults and ensure the safety of the equipment itself, the new energy unit, and the public power grid. Over / under voltage protection unit 6 and overcurrent / short circuit protection unit 7 are connected in series on the main power supply line, configured with a threshold triggering mechanism. The over / under voltage protection threshold is set to ±5% of the rated voltage; when the line voltage exceeds this range, the line is immediately disconnected. The overcurrent threshold is set to 1.2 times the rated current; it acts quickly in the event of an overcurrent or short circuit fault to prevent equipment burnout and power grid impact. Anti-islanding protection unit 8 connects to the grid connection interface module 4 and has a built-in power grid fault linkage disconnection mechanism. When a power outage occurs in the public power grid, the grid connection is quickly disconnected to prevent the equipment from continuing to supply power to isolated lines, avoiding electrical safety hazards. Lightning protection unit 9 is located at the grounding terminal of the equipment casing and has a pre-set dedicated discharge path for lightning current, effectively discharging the surge current generated by lightning strikes and protecting the internal circuits of the equipment (such as controllers, sensors, inverters, etc.) from lightning damage.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart control device for grid connection of biomass biogas and wind power, comprising a multi-energy access module (1), a smart control host (2), an energy storage buffer module (3), a grid connection interface module (4), and a safety protection module (5). Its features are: The output end of the multi-energy access module (1) is electrically connected to the input end of the intelligent control host (2). The intelligent control host (2) is bidirectionally electrically connected to the energy storage buffer module (3) and the grid connection interface module (4). The safety protection module (5) is electrically connected to the multi-energy access module (1), the intelligent control host (2), the energy storage buffer module (3), and the grid connection interface module (4). The multi-energy access module (1) is adapted to access the electricity of the biomass biogas power generation unit and the wind power generation unit. The intelligent control host (2) has a built-in algorithm to realize the coordinated intelligent scheduling and dynamic parameter adjustment of biomass biogas electricity and wind power. The grid connection interface module (4) is connected to the public power grid. The energy storage buffer module (3) cooperates with the intelligent control host (2).

2. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The multi-energy access module (1) includes a biogas power generation access unit (11), a wind power access unit (12), and a rectifier and filter unit (13). The output terminals of the biogas power generation access unit (11) and the wind power access unit (12) are electrically connected to the input terminal of the rectifier and filter unit (13). The output terminal of the rectifier and filter unit (13) is electrically connected to the input terminal of the intelligent control host (2). The biogas power generation access unit (11) and the wind power access unit (12) are each equipped with a voltage and current detection sensor (14), which is signal-connected to the intelligent control host (2).

3. The intelligent control device for grid connection of biomass biogas and wind power according to claim 2, characterized in that: The rectifier and filter unit (13) includes a rectifier bridge (31) and an LC filter circuit (25). The input end of the rectifier bridge (31) is connected to the output end of the biogas power generation access unit (11) and the wind power access unit (12). The output end of the rectifier bridge (31) is connected to the input end of the LC filter circuit (25). The output end of the LC filter circuit (25) is connected to the intelligent control host (2). The voltage and current detection sensor (14) is a Hall sensor. The Hall sensor is connected to the rectifier and filter unit (13) and the intelligent control host (2) respectively.

4. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The intelligent control host (2) includes a main controller (15), a power regulation unit (16), a data acquisition unit (17), and a communication transmission unit (18). The input end of the data acquisition unit (17) is electrically connected to the multi-energy access module (1), the energy storage buffer module (3), and the grid connection interface module (4), respectively. The output end of the data acquisition unit (17) is electrically connected to the input end of the main controller (15). The output end of the main controller (15) is electrically connected to the input end of the power regulation unit (16). The power regulation unit (16) is electrically connected to the multi-energy access module (1) and the energy storage buffer module (3), respectively. The communication transmission unit (18) is bidirectionally electrically connected to the main controller (15). The communication transmission unit (18) adopts 5G and Ethernet dual-mode communication and is connected to the remote monitoring platform.

5. The intelligent control device for grid connection of biomass biogas and wind power according to claim 4, characterized in that: The main controller (15) has a built-in multi-objective optimization scheduling algorithm and a power prediction model. The multi-objective optimization scheduling algorithm configures the output ratio parameters of the two energy sources, and the power prediction model has built-in wind power fluctuation correlation parameters. The power regulation unit (16) includes a bidirectional DC / DC converter (26) and a DC / AC inverter (27). The bidirectional DC / DC converter (26) is electrically connected to the energy storage buffer module (3), and the DC / AC inverter (27) is electrically connected to the grid connection interface module (4).

6. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The intelligent control host (2) also includes a human-computer interaction module (10), which is bidirectionally electrically connected to the intelligent control host (2). The human-computer interaction module (10) includes a touch screen (28) and a status indicator (29). The touch screen (28) is configured with parameter display and threshold setting functions, and the status indicator (29) is configured with a multi-color display mode.

7. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The energy storage buffer module (3) includes an energy storage battery pack (19), a battery management unit (20), and a charge / discharge control unit (21). The charge / discharge control unit (21) is bidirectionally electrically connected to the energy storage battery pack (19) and the intelligent control host (2), respectively. The battery management unit (20) is electrically connected to the energy storage battery pack (19), and the battery management unit (20) communicates bidirectionally with the intelligent control host (2). The battery management unit (20) monitors the SOC value, voltage, and temperature parameters of the energy storage battery pack (19). The battery management unit (20) establishes a monitoring data transmission link with the intelligent control host (2). The charge / discharge control unit (21) receives the control instructions from the intelligent control host (2).

8. The intelligent control device for grid connection of biomass biogas and wind power according to claim 7, characterized in that: The energy storage battery pack (19) is a lithium battery pack, which is configured with high energy density and fast charging and discharging parameters; and the energy storage battery pack (19) is provided with a heat insulation shell (30) on the outside. The charging and discharging control unit (21) has a built-in charging and discharging threshold adjustment module, which can adjust the upper and lower limits of charging and discharging according to the instructions of the intelligent control host (2).

9. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The grid connection interface module (4) includes a grid connection switch unit (22), a voltage and frequency synchronization unit (23), and an energy metering unit (24). The input terminal of the grid connection switch unit (22) is electrically connected to the output terminal of the intelligent control host (2), and the output terminal of the grid connection switch unit (22) is connected to the public power grid. The voltage and frequency synchronization unit (23) is electrically connected to the intelligent control host (2) and the grid connection switch unit (22) respectively. The voltage and frequency synchronization unit (23) matches the grid voltage and frequency parameters. The energy metering unit (24) is connected in series on the connection line between the grid connection switch unit (22) and the public power grid to measure the total amount of energy connected to the grid and the real-time power.

10. The intelligent control device for grid connection of biomass biogas and wind power according to claim 1, characterized in that: The safety protection module (5) includes an over / under voltage protection unit (6), an overcurrent and short circuit protection unit (7), an anti-islanding protection unit (8), and a lightning protection unit (9). The over / under voltage protection unit (6) and the overcurrent and short circuit protection unit (7) are connected in series on the main power supply line. The over / under voltage protection unit (6) and the overcurrent and short circuit protection unit (7) are configured with voltage and current safety threshold triggering mechanisms. The anti-islanding protection unit (8) is electrically connected to the grid interface module (4) and is configured with a grid fault linkage disconnection mechanism. The lightning protection unit (9) is set at the grounding terminal of the equipment casing and is configured with a lightning current discharge path.

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