A wind-solar-storage energy dispatching practical training system

Abstract

This utility model discloses a wind-solar-storage energy dispatching training system, including an engineering-grade AC / DC hybrid microgrid dispatching module and a new energy equipment dispatching training module. The engineering-grade AC / DC hybrid microgrid dispatching module includes a new energy simulated power generation system, an energy management and control subsystem, and an energy storage subsystem. The new energy equipment dispatching training module includes a wind-solar integrated training platform, which is communicatively connected to the energy management and control subsystem, and the energy management and control subsystem is also communicatively connected to the energy storage subsystem. This utility model achieves an integrated design of engineering application and teaching training. The engineering-grade AC / DC hybrid microgrid dispatching module can be used for teaching, research, and engineering studies of new energy microgrids, while the new energy equipment dispatching training module can be used for basic theoretical and practical training.

Description

Technical Field

[0001] This utility model relates to a wind, solar and energy storage energy dispatch training system. Background Technology

[0002] With the advancement of new power system construction, the application of wind, solar and energy storage distributed energy systems is becoming increasingly widespread. At the same time, the demand for professional talents in the field of new energy is also continuously increasing, and there is an urgent need for an integrated energy dispatch system that combines engineering research and teaching and training functions.

[0003] Current related technologies are mainly divided into two core categories: engineering-grade wind-solar-storage microgrid systems and basic new energy assembly and commissioning training platforms. Engineering-grade wind-solar-storage microgrid systems are primarily used in engineering scenarios such as power generation companies, grid companies, and microgrid system integrators. Their core function is to achieve grid-connected / off-grid operation of photovoltaic power generation, wind power generation, and energy storage systems, as well as basic energy dispatching, meeting the basic energy supply and dispatching needs in engineering scenarios. Basic new energy assembly and commissioning training platforms are mainly used in vocational colleges for teaching and training in new energy equipment technology, electrical automation technology, and other related majors. They can conduct training projects such as disassembly and assembly of wind and solar power generation equipment, wiring, and basic electrical characteristic testing, helping students master the basic architecture and working principles of integrated wind and solar systems, meeting the teaching needs of basic theory and basic practical skills in new energy majors. However, shortcomings include: 1. A disconnect between engineering applications and teaching and training; most systems only focus on single-engineering power generation or basic teaching, failing to achieve full-level training from basic practical skills to engineering-grade dispatching; 2. Insufficient energy dispatching flexibility; the energy storage charging and discharging strategy is singular, making it difficult to smooth out power output fluctuations from photovoltaic and wind turbines, and exhibiting poor interaction with the upper-level power grid. Utility Model Content

[0004] To address the above shortcomings, the purpose of this utility model is to overcome the deficiencies of the existing technology and provide a wind, solar and energy storage energy dispatch training system. This system integrates engineering-level new energy microgrid dispatch with new energy equipment dispatch training, solving the problems of poor dispatch flexibility, imperfect protection, and single training level in the existing system. At the same time, it meets the multiple needs of new energy teaching and research, engineering research, and vocational skills training under the new power system.

[0005] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: a wind-solar-storage energy dispatching training system, including an engineering-grade AC / DC hybrid microgrid dispatching module and a new energy equipment dispatching training module. The engineering-grade AC / DC hybrid microgrid dispatching module includes a new energy analog power generation system, an energy management and control subsystem, and an energy storage subsystem. The new energy equipment dispatching training module includes a wind-solar integrated training platform. The wind-solar integrated training platform and the energy management and control subsystem are communicatively connected. The energy management and control subsystem and the energy storage subsystem are also communicatively connected.

[0006] Furthermore, the engineering-grade AC / DC hybrid microgrid dispatch module also includes a load distribution subsystem, a DC protection subsystem, and a grid connection subsystem. The output terminal of the new energy analog power generation system is connected to the energy storage subsystem and the load distribution subsystem. The energy storage subsystem is bidirectionally connected to the load distribution subsystem. The DC protection subsystem is electrically connected to the new energy analog power generation system, the energy storage subsystem, and the load distribution subsystem. The energy management and control subsystem is communicatively connected to each subsystem. The grid connection subsystem enables grid connection / off-grid switching with the public power grid.

[0007] Furthermore, the new energy simulation power generation system includes a photovoltaic power generation system and / or a wind power power generation system, which provides power to the energy storage subsystem and the load distribution subsystem; the photovoltaic power generation system includes monocrystalline silicon photovoltaic modules, and the photovoltaic power generation system is equipped with a photovoltaic converter, which converts the DC power generated by the photovoltaic modules into AC power and connects it to the bus; the wind power power generation system includes a DC wind turbine and is connected to the bus.

[0008] Furthermore, the integrated wind and solar training platform also includes a photovoltaic module module, an array support module, a wind power generation module, a photovoltaic charging control module, an off-grid inverter control module, an instrument monitoring module, a switch control module, an environmental monitoring module, and a host computer monitoring module, which can realize the basic assembly, debugging, and electrical characteristic testing of photovoltaic power generation and wind power generation.

[0009] Furthermore, the load distribution subsystem includes lighting DC loads and DC charging piles. The DC charging piles are bidirectional charging piles, which can simulate reverse power supply from electric vehicles to achieve flexible control on the load side.

[0010] Furthermore, the energy storage subsystem includes an outdoor cabinet-type energy storage device, equipped with a bidirectional DC / DC converter and a battery management system (BMS). The BMS includes a battery module monitoring unit (BMU), an energy storage system management unit (BCMU), a battery stack management unit (BAMS), and a display and monitoring host computer. The BMU collects the voltage and temperature of individual batteries in real time, performs self-checks the circuit status, and reports to the BCMU via a CAN line. The BCMU summarizes the data and reports it to the BAMS, and performs safety inspections. When the threshold is exceeded, an alarm or trip protection is triggered. The BAMS sorts out the energy storage system information, reports it to the energy management and control subsystem, and arbitrates and determines the alarm information.

[0011] Furthermore, the DC protection subsystem is equipped with a bus insulation monitoring and protection unit, a branch protection unit, and a converter protection unit. The bus insulation monitoring and protection unit adopts a high-sensitivity insulation fault monitoring device; the branch protection unit provides over- and under-voltage protection, overcurrent instantaneous trip protection, leakage current protection, and fault recording for each important branch; the converter protection unit provides valve short-circuit and bridge arm short-circuit fault protection for AC / DC and DC / DC converters.

[0012] Furthermore, the energy management and control subsystem is equipped with a local display terminal, workstation, and cloud service platform, which can realize analog quantity acquisition, status quantity acquisition, real-time monitoring, remote scheduling, and communication functions, and realize communication connection with various subsystems and training platforms.

[0013] Furthermore, the grid-connected subsystem is equipped with a microgrid access cabinet to connect distributed power sources, lighting loads, and the public power grid. The microgrid access cabinet has a built-in grid-connected / off-grid switching device, which can quickly achieve islanded operation when the external power grid fails, and the distributed energy and energy storage system provides uninterrupted power supply to the load. After the power grid is restored, it can seamlessly switch to grid-connected operation.

[0014] Furthermore, the monocrystalline silicon photovoltaic module is equipped with a movable shading component, which can selectively shade part or all of the surface of the monocrystalline silicon photovoltaic module; the wind power generation system includes a wind simulation device, which can simulate airflow of different intensities.

[0015] The beneficial technical effects of this utility model are as follows:

[0016] (1) The wind-solar-storage energy dispatch training system of this utility model realizes the integrated design of engineering application and teaching training. The engineering-level AC / DC hybrid microgrid dispatch module can carry out teaching, scientific research and engineering research on new energy microgrids, and the new energy equipment and commissioning training module can carry out basic theory and practical training, meeting the needs of new energy professional talents from junior to senior levels. On the other hand, the training module is used for basic theory and simulation training. After students master the corresponding skills, they can use the engineering-level AC / DC hybrid microgrid dispatch module for teaching and more practical training that is closer to engineering practice. This takes into account both the gradual progress and safety of skill learning and the practical operation of actual engineering applications.

[0017] (2) The energy dispatch is highly flexible. The energy storage subsystem supports three charging and discharging operation modes. The bidirectional DC / DC converter can quickly control power and bidirectionally dispatch energy, smooth out the output fluctuations of photovoltaic and wind turbines, and at the same time realize peak shaving and valley filling, and improve the friendly interaction with the upper-level power grid.

[0018] (3) The operation is safe and reliable. A layered DC protection subsystem is set up to achieve all-round protection of bus insulation monitoring, branch protection and converter protection, effectively avoiding the impact of faults such as grounding, overcurrent and overvoltage on the system. At the same time, the fan and energy storage are equipped with lightning protection, corrosion protection and other protective measures.

[0019] (4) The structure is reasonably designed, each subsystem is modularly designed, the communication connection is smooth, and it supports mainstream communication protocols such as RS485 and TCP / IP. It can realize local monitoring and remote scheduling. At the same time, the training platform is highly disassembled, which is convenient for students to operate and deepen their understanding of wind, solar and energy storage systems.

[0020] (5) Strong adaptability: The photovoltaic power generation system is designed and installed at an angle according to the local solar resources characteristics. The energy storage subsystem adopts outdoor cabinet installation to reduce safety risks. The whole system can be flexibly connected to different types of loads and distributed energy sources, which is convenient for expansion and upgrading. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one of the communication protocols of this utility model;

[0022] Figure 2 This is a schematic diagram of another communication protocol of this utility model;

[0023] Figure 3 A block diagram showing the relationships between the subsystems of an engineering-grade AC / DC hybrid microgrid scheduling module;

[0024] Figure 4 A diagram showing the relationships between the modules of the integrated wind and solar power training platform;

[0025] Figure 5 A schematic diagram of photovoltaic modules installed on a rooftop;

[0026] Figure 6 This is a schematic diagram of the simulation system.

[0027] Explanation of reference numerals in the attached diagram: 1. Guide rail; 2. Shading component; 3. Photovoltaic module; 4. Support frame; 5. Artificial light source; 6. Photovoltaic panel; 7. Wind turbine; 8. Wind-solar integrated training platform. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] Reference Figures 1 to 6 This utility model discloses a wind-solar-storage energy dispatch training system, which includes an engineering-grade AC / DC hybrid microgrid dispatch module and a new energy equipment dispatch training module. The new energy equipment dispatch training module includes a wind-solar integrated training platform. The wind-solar integrated training platform and the energy management and control subsystem of the engineering-grade AC / DC hybrid microgrid dispatch module are connected in communication, thus integrating the engineering-grade wind-solar-storage microgrid system with the new energy equipment dispatch training platform and solving the technical problem of their mutual separation.

[0030] The engineering-grade AC / DC hybrid microgrid dispatch module specifically includes a photovoltaic power generation system, a wind power power generation system, an energy storage subsystem, a load distribution subsystem, a DC protection subsystem, an energy management and control subsystem, and a grid connection subsystem.

[0031] Photovoltaic power generation system: A 20kW outdoor rooftop photovoltaic system can be used, with several LONGi monocrystalline silicon modules LR7-72HTH 615M installed on the roof in an 11-string, 3-parallel configuration, and equipped with one 20kW photovoltaic converter. The photovoltaic system is installed at a tilt angle of 21° (optimized for local resource conditions). The applicant's location has a subtropical monsoon climate with 1376.05 hours of effective sunshine per year and an annual total horizontal radiation of 4716 MJ / ㎡. Photovoltaic modules 3 can fully utilize local solar resources to achieve efficient power generation. The photovoltaic converter converts the DC power generated by photovoltaic modules 3 into AC power, which is connected to the DC 750V bus to charge the energy storage subsystem and power the load distribution subsystem. In this embodiment, refer to... Figure 5 As shown, the monocrystalline silicon photovoltaic module 3 is equipped with a movable shading component 2. The movable shading component 2 includes a tarpaulin for blocking sunlight and a guide rail 1. An electric slider is provided on the guide rail 1. The slider is connected to the tarpaulin. The slider can drive the tarpaulin to cover the surface of the photovoltaic module 3. It can controllably simulate the power output fluctuation of the power generation system in real time and can perform practical training operations to smooth out fluctuations and fill valleys.

[0032] Wind power generation system: A 2kW outdoor DC wind turbine generator can be used. The turbine blades are made of gelcoat resin and reinforced fiberglass, specifically designed for megawatt-class wind turbine blades, achieving an aerodynamic efficiency higher than 0.4 and noise levels lower than 65dB. The generator uses strong magnetic materials, superior bearings, F-class insulation, IP54 protection, and has a service life exceeding 30,000 hours. The rotor employs a mechanical centrifugal variable pitch mechanism, and the tower uses a multi-faceted tapered steel structure with hot-dip galvanized anti-corrosion treatment. The wind turbine is equipped with lightning rods and grounding wires, with a lightning protection grounding resistance of less than 4Ω. A lightning protection junction box is installed on the grid-connected inverter side. The wind turbine converts wind energy into mechanical energy, which then drives a permanent magnet DC generator to produce DC electricity, connected to the DC 750V bus.

[0033] Energy Storage Subsystem: Utilizing a 25.6kWh outdoor cabinet-type energy storage device, the core of which is a lithium iron phosphate battery, equipped with a 20kW bidirectional DC / DC converter and a Battery Management System (BMS). The BMS consists of a Battery Module Monitoring Unit (BMU), an Energy Storage System Management Unit (BCMU), a Battery Stack Management Unit (BAMS), and a display and monitoring upper-level system. The BMU collects the voltage and temperature of individual batteries in real time, performs self-checks circuit status, and reports to the BCMU via CAN bus. The BCMU aggregates the data and reports it to the BAMS, performing safety checks and triggering alarms or tripping protection when thresholds are exceeded. The BAMS compiles all energy storage system information, reports it to the Energy Management and Control Subsystem, and arbitrates alarm information. The energy storage subsystem supports three charging and discharging operation modes: peak shaving and valley filling, smoothing out distributed energy output fluctuations, and tracking the planned output of the upper-level power grid. It can quickly control power and bidirectionally dispatch energy.

[0034] Load Distribution Subsystem: The power supply lines inside the training room are modified to convert the lighting load to DC power and connect it to the system. At the same time, a 20kW bidirectional DC charging pile in the intelligent charging station training room is connected to the system. This charging pile can simulate the reverse power supply of an electric vehicle, realizing flexible control on the load side. All loads of the load distribution subsystem are uniformly scheduled by the energy management and control subsystem.

[0035] DC Protection Subsystem: This system features three layers of protection: a bus insulation monitoring and protection unit, a branch protection unit, and a converter protection unit. ① The bus insulation monitoring and protection unit employs a high-sensitivity insulation fault monitoring device. The balanced bridge resistance ensures the positive-to-ground voltage ratio is less than 1.222, enabling the detection of various faults such as single / double-pole grounding and insulation degradation. It also prevents false tripping in the event of a sudden single-point grounding. ② The branch protection unit provides over / under voltage protection, overcurrent instantaneous trip protection, leakage current protection, and fault recording for each important branch. ③ The converter protection unit provides fault protection for AC / DC and DC / DC converters, including valve short circuit and bridge arm short circuit protection. Combined with the device's own protection and system backup protection, it achieves comprehensive protection for the converter.

[0036] Energy Management and Control Subsystem: A monitoring room is set up, equipped with local display terminals, workstations, and a cloud service platform, providing real-time monitoring functions for photovoltaic power generation, energy storage, and load: ① Analog Input Acquisition: Acquires voltage, current, power, and energy consumption at various points; ② Status Input Acquisition: Acquires switch positions, fault trip signals, and protection action signals; ③ Real-time Monitoring: Displays total photovoltaic power generation, energy storage charging and discharging power, and load power, showing power curves and energy consumption analysis charts; ④ Remote Dispatch: Enables telemetry, remote signaling, remote adjustment, and remote control of distributed power sources, energy storage, and loads, supporting distributed generation forecasting, load forecasting, and energy optimization dispatch; ⑤ Communication Function: Supports RS485 and TCP / IP Ethernet communication protocols, enabling communication connections with various subsystems and training platforms, while also supporting cloud service deployment, Web application development, and mini-program development.

[0037] Grid-connected subsystem: Configured with microgrid access cabinet to connect distributed power sources, lighting loads and public power grid. The microgrid access cabinet has a built-in grid-connected / off-grid switching device, which can quickly achieve islanded operation when the external power grid fails, and the distributed energy and energy storage system provides uninterrupted power supply to the load; after the power grid is restored, it can seamlessly switch to grid-connected operation.

[0038] The output terminals of the aforementioned photovoltaic power generation system and wind power power generation system are connected to the energy storage subsystem and the load distribution subsystem. The energy storage subsystem and the load distribution subsystem are bidirectionally connected. The DC protection subsystem is electrically connected to the photovoltaic power generation system, the wind power power generation system, the energy storage subsystem, and the load distribution subsystem. The energy management and control subsystem is communicatively connected to the aforementioned subsystems and the grid-connected subsystem. The grid-connected subsystem enables grid-connected / off-grid switching with the public power grid.

[0039] The integrated wind and solar power training platform 8 includes photovoltaic module modules, array support modules, wind power generation modules, photovoltaic charging control modules, off-grid inverter control modules, instrument monitoring modules, switch control modules, environmental monitoring modules, and upper computer monitoring modules. It can realize the basic assembly, debugging, and electrical characteristic testing of photovoltaic and wind power generation systems. (Refer to...) Figure 6 The photovoltaic module can also utilize an artificial light source 5, mounted on a bracket 4 and positioned directly above the photovoltaic panel 6. Power generation occurs by illuminating the indoor photovoltaic panel 6 with the artificial light source 5, and the output can be controlled by adjusting the light intensity. This allows for normal teaching and training even when the outdoor photovoltaic module 3 is unavailable, such as on cloudy days or at night. The wind power module can include a wind simulation device, which can employ a variable frequency fan. By adjusting the fan's power, different airflow intensities can be simulated. A small indoor wind turbine 7 can simulate power fluctuations in the generator system. This embodiment provides the necessary conditions for teaching and training even when the outdoor wind turbine 7 is unavailable.

[0040] In this embodiment, the new energy assembly and commissioning training module is equipped with 6 sets of wind-solar integrated training platforms and 4 sets of U-shaped learning work islands. All wind-solar integrated training platforms are connected to the energy management and control subsystem of the engineering-grade AC / DC hybrid microgrid scheduling module via TCP / IP Ethernet, enabling real-time acquisition of the operating data of the engineering-grade microgrid system and realizing the linkage between training and actual engineering. Students can use the training platforms to conduct basic training such as photovoltaic power generation equipment assembly and commissioning, wind power generation equipment assembly and commissioning, and rectifier / inverter module measurement and commissioning, to understand the basic architecture of the wind-solar integrated system, the operating characteristics of photovoltaic panels, and the charging control logic of energy storage batteries. At the same time, they can use the engineering-grade AC / DC hybrid microgrid scheduling module to conduct engineering-grade training such as new energy microgrid system design, installation and commissioning, integration development, operation and maintenance.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wind-solar-storage energy dispatch training system, characterized in that: It includes an engineering-grade AC / DC hybrid microgrid dispatch module and a new energy equipment commissioning training module. The engineering-grade AC / DC hybrid microgrid dispatch module includes a new energy analog power generation system, an energy management and control subsystem, and an energy storage subsystem. The new energy equipment commissioning training module includes a wind-solar integrated training platform. The wind-solar integrated training platform is communicatively connected to the energy management and control subsystem, and the energy management and control subsystem is communicatively connected to the energy storage subsystem.

2. The wind-solar-storage energy dispatch training system according to claim 1, characterized in that: The engineering-grade AC / DC hybrid microgrid dispatch module also includes a load distribution subsystem, a DC protection subsystem, and a grid connection subsystem. The output of the new energy analog power generation system is connected to the energy storage subsystem and the load distribution subsystem. The energy storage subsystem is bidirectionally connected to the load distribution subsystem. The DC protection subsystem is electrically connected to the new energy analog power generation system, the energy storage subsystem, and the load distribution subsystem. The energy management and control subsystem is communicatively connected to each subsystem. The grid connection subsystem enables grid connection / off-grid switching with the public power grid.

3. A wind-solar-storage energy dispatch training system according to claim 1 or 2, characterized in that: The new energy simulation power generation system includes a photovoltaic power generation system and / or a wind power power generation system, which provides power to the energy storage subsystem charging and the load distribution subsystem. The photovoltaic power generation system includes monocrystalline silicon photovoltaic modules and is equipped with a photovoltaic converter, which converts the direct current generated by the photovoltaic modules into alternating current and connects it to the bus. The wind power generation system includes a DC wind turbine generator and is connected to the bus.

4. The wind-solar-storage energy dispatch training system according to claim 3, characterized in that: The integrated wind and solar training platform also includes a photovoltaic module module, an array support module, a wind power generation module, a photovoltaic charging control module, an off-grid inverter control module, an instrument monitoring module, a switch control module, an environmental monitoring module, and a host computer monitoring module, which can realize the basic assembly, debugging, and electrical characteristic testing of photovoltaic power generation and wind power generation.

5. The wind-solar-storage energy dispatch training system according to claim 2, characterized in that: The load distribution subsystem includes lighting DC loads and DC charging piles. The DC charging piles are bidirectional charging piles, which can simulate the reverse power supply of electric vehicles to achieve flexible control on the load side.

6. The wind-solar-storage energy dispatch training system according to claim 2, characterized in that: The energy storage subsystem includes an outdoor cabinet-type energy storage device, equipped with a bidirectional DC / DC converter and a battery management system (BMS). The BMS includes a battery module monitoring unit (BMU), an energy storage system management unit (BCMU), a battery stack management unit (BAMS), and a display and monitoring host computer. The BMU collects the voltage and temperature of individual batteries in real time, performs self-checks the circuit status, and reports to the BCMU via a CAN line. The BCMU summarizes the data and reports it to the BAMS, and performs safety inspections. When the threshold is exceeded, an alarm or trip protection is triggered. The BAMS sorts out the energy storage system information, reports it to the energy management and control subsystem, and arbitrates and determines the alarm information.

7. The wind-solar-storage energy dispatch training system according to claim 2, characterized in that: The DC protection subsystem is equipped with a bus insulation monitoring and protection unit, a branch protection unit, and a converter protection unit. The bus insulation monitoring and protection unit adopts a high-sensitivity insulation fault monitoring device. The branch protection unit provides over- and under-voltage protection, overcurrent instantaneous trip protection, leakage current protection, and fault recording for each important branch. The converter protection unit is equipped with valve short-circuit and bridge arm short-circuit fault protection for AC / DC and DC / DC converters.

8. The wind-solar-storage energy dispatch training system according to claim 2, characterized in that: The energy management and control subsystem is equipped with a local display terminal, workstation and cloud service platform, which can realize analog quantity acquisition, status quantity acquisition, real-time monitoring, remote scheduling and communication functions, and realize communication connection with various subsystems and training stations.

9. A wind-solar-storage energy dispatch training system according to claim 2, characterized in that: The grid-connected subsystem is equipped with a microgrid access cabinet that connects distributed power sources, lighting loads and the public power grid. The microgrid access cabinet has a built-in grid-connected / off-grid switching device, which can quickly achieve islanded operation when the external power grid fails, and the distributed energy and energy storage system provides uninterrupted power supply to the load. After the power grid is restored, it can seamlessly switch to grid-connected operation.

10. A wind-solar-storage energy dispatch training system according to claim 3, characterized in that: The monocrystalline silicon photovoltaic module is equipped with a movable shading component, which can selectively shade part or all of the surface of the monocrystalline silicon photovoltaic module; the wind power generation system includes a wind simulation device, which can simulate airflow of different intensities.

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