Container type experimental platform for energy storage converter

Abstract

The utility model relates to the technical field of current transformers, and discloses an energy storage current transformer container type experiment platform, which comprises a container body, and a direct current power distribution cabinet, a first bidirectional energy storage current transformer and a second bidirectional energy storage current transformer are arranged in the container body, through the adaptation of the first bidirectional energy storage converter and the DC power distribution cabinet to the two-stage energy storage device and the direct hooking of the second bidirectional energy storage converter to the single-stage energy storage device, the whole energy storage system forms a complementary access architecture. According to the energy storage system, both high-voltage and large-capacity two-stage type energy storage equipment and low-cost and low-voltage single-stage type energy storage equipment can stably operate in the system, flexible access of energy storage equipment of multiple types and different voltage grades is achieved, the compatibility and applicability of the energy storage system are effectively improved, and diversified energy storage and application requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of converter technology, specifically to a containerized experimental platform for energy storage converters. Background Technology

[0002] In modern energy systems, single energy storage technologies face significant limitations, struggling to simultaneously achieve core performance indicators such as energy density, power density, system efficiency, lifespan, and cost. For grid applications, to achieve stable system operation, optimized power quality, and peak-shaving and valley-filling power balance control across multiple time scales, energy storage technology development is increasingly moving towards diversified and integrated utilization models. By integrating the advantages of different energy storage technologies, not only can the total life-cycle cost of energy storage systems be effectively reduced, but their overall economic efficiency can also be significantly improved. In recent years, with the acceleration of energy transition, the value of energy storage technology in ensuring the safe and stable operation of the power grid and the reliability of power supply has become increasingly prominent, becoming a key technological support for achieving "dual carbon" goals.

[0003] However, a systematic understanding of the impact mechanisms, operational patterns, and characteristics of large-scale, multi-type energy storage systems on the power system after grid connection has not yet been formed. Against this backdrop, constructing experimental platforms to conduct grid-connected testing of energy storage systems has become a crucial issue that urgently needs to be addressed. It is worth noting that current research on energy storage converters for power hardware-in-the-loop simulation platforms of novel energy storage systems that support flexible access to multiple types and voltage levels of energy storage units remains relatively scarce. Utility Model Content

[0004] In view of this, this utility model provides a containerized experimental platform for energy storage converters to address the problem that research on energy storage converters for power hardware-in-the-loop simulation platforms of new energy storage systems that support flexible access to multiple types and different voltage levels of energy storage units is still relatively scarce.

[0005] This utility model provides a containerized experimental platform for energy storage converters, including a container body. Inside the container body are a DC distribution cabinet, a first bidirectional energy storage converter, and a second bidirectional energy storage converter. The DC distribution cabinet is used to connect at least one two-stage energy storage device and, after voltage matching, is connected to the DC side of the first bidirectional energy storage converter. The first bidirectional energy storage converter has its AC side connected to an AC bus. The second bidirectional energy storage converter has its DC side connected to a single-stage energy storage device and its AC side connected to an AC bus.

[0006] This invention adapts a two-stage energy storage device to a first bidirectional energy storage converter and a DC distribution cabinet, and directly connects a second bidirectional energy storage converter to a single-stage energy storage device, forming a complementary access architecture for the entire energy storage system. Whether it's a high-voltage, large-capacity two-stage energy storage device or a low-cost, low-voltage single-stage energy storage device, both can operate stably in this system. This enables flexible access for multiple types and voltage levels of energy storage devices, effectively improving the compatibility and applicability of the energy storage system and meeting diverse energy storage and application needs.

[0007] In one optional embodiment, the DC distribution cabinet includes: a bidirectional DC-DC access cabinet and an energy storage device access cabinet. The bidirectional DC-DC access cabinet has at least one bidirectional DC-DC module built in it. The first DC side of each bidirectional DC-DC module is connected to a two-stage energy storage device through the energy storage device access cabinet, and the second DC side of each bidirectional DC-DC module is connected to the DC side of a first bidirectional energy storage converter.

[0008] In one alternative implementation, the single-stage energy storage device includes a sodium-ion battery; the two-stage energy storage device includes a flywheel, a supercapacitor, a lithium iron phosphate battery, a vanadium redox flow battery, a solid-state lithium-ion battery, and an aqueous sodium-ion battery.

[0009] In one optional embodiment, the containerized test platform for the energy storage converter further includes a DC combiner cabinet, which is disposed inside the container and is used to combine the second DC side of all bidirectional DC-DC modules and connect it to the DC side of the first bidirectional energy storage converter.

[0010] In one optional implementation, the containerized test platform for energy storage converters further includes an AC combiner box, which is located inside the container and is used to combine the AC side of the first bidirectional energy storage converter and the AC side of the second bidirectional energy storage converter and input them into the power cabinet.

[0011] In one alternative implementation, the energy storage converter containerized test platform further includes a video monitoring system installed inside the container for continuously monitoring all equipment inside the container at preset intervals.

[0012] In one alternative embodiment, the energy storage converter containerized test platform further includes: a fire alarm device installed inside the container for detecting whether a fire has occurred inside the container; and a fire alarm controller installed inside the container for issuing an alarm signal when a fire occurs.

[0013] In one alternative embodiment, the energy storage converter containerized test platform further includes: an automatic fire suppression system housed within the container; and a gas fire extinguishing controller housed within the container, used to activate the automatic fire suppression system based on an alarm signal.

[0014] In one alternative embodiment, the energy storage converter containerized test platform further includes a temperature control device disposed inside the container to maintain a stable temperature inside the container.

[0015] In one alternative embodiment, the energy storage converter containerized test platform further includes a power supply device disposed inside the container, which is used to supply power to the various devices inside the container. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a composition diagram of the containerized experimental platform for energy storage converter according to an embodiment of the present utility model;

[0018] Figure 2 This is a composition diagram of another energy storage converter containerized experimental platform according to an embodiment of the present utility model;

[0019] Figure 3 This is a composition diagram of another energy storage converter containerized experimental platform according to an embodiment of the present utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] This embodiment provides a containerized experimental platform for energy storage converters, such as... Figure 1 As shown, it includes a container body, and a DC power distribution cabinet, a first bidirectional energy storage converter, and a second bidirectional energy storage converter are installed inside the container body.

[0022] like Figure 1 As shown, a DC distribution cabinet is used to connect at least one two-stage energy storage device, and after voltage matching, it is connected to the DC side of the first bidirectional energy storage converter; the first bidirectional energy storage converter has its AC side connected to the AC bus; the second bidirectional energy storage converter has its DC side connected to a single-stage energy storage device, and its AC side connected to the AC bus.

[0023] Specifically, the single-stage access method involves electrical energy passing through only one power conversion stage from input to output, achieving the target function (such as voltage / current conversion, AC / DC conversion, power control, etc.) through a single converter. The two-stage access method involves electrical energy passing through two independent power conversion stages from input to output, with each converter performing a different function, achieving complex goals through cascading.

[0024] Specifically, the energy storage devices include: flywheels, supercapacitors, lithium iron phosphate batteries, vanadium redox flow batteries, solid-state lithium-ion batteries, sodium-ion batteries, and aqueous sodium-ion batteries. Among these, single-stage energy storage devices include sodium-ion batteries, requiring a single-stage connection method to connect the sodium-ion batteries to the second bidirectional energy storage converter; two-stage energy storage devices include: flywheels, supercapacitors, lithium iron phosphate batteries, vanadium redox flow batteries, solid-state lithium-ion batteries, and aqueous sodium-ion batteries, requiring a bipolar connection method to connect these six types of energy storage devices to the DC distribution cabinet.

[0025] Specifically, the DC distribution cabinet is used to convert DC voltage to DC voltage so as to connect the two-stage energy storage device to the first bidirectional energy storage converter in a voltage matching manner.

[0026] Optionally, the first and second bidirectional energy storage converters mainly consist of power conversion circuits, control circuits, and drive circuits. Their working principle involves controlling the switching devices in the power conversion circuit to convert direct current (DC) to alternating current (AC) or vice versa, thereby enabling bidirectional energy flow between the energy storage system and the power grid. During charging, the bidirectional energy storage converter converts AC from the grid or other power sources into DC to charge the energy storage devices (such as batteries and supercapacitors); during discharging, it converts the DC from the energy storage devices into AC and supplies it to the grid or other loads.

[0027] In some optional implementations, the DC distribution cabinet includes: a bidirectional DC-DC access cabinet and an energy storage device access cabinet. The bidirectional DC-DC access cabinet has at least one bidirectional DC-DC module built in it. The first DC side of each bidirectional DC-DC module is connected to a two-stage energy storage device through the energy storage device access cabinet, and the second DC side of each bidirectional DC-DC module is connected to the DC side of a first bidirectional energy storage converter.

[0028] Specifically, considering that the external characteristics of each energy storage battery are different, connecting it to the DC side of the bidirectional PCS would increase the design difficulty of the PCS DC side, and the working stability would be poor, and the later maintenance and management of the battery would not be very convenient. Therefore, a two-stage access method is used to connect the energy storage device to the first DC side of the bidirectional DC-DC module, with the bidirectional DC / DC module performing voltage matching, and then connecting it to a first bidirectional energy storage converter. That is, one two-stage energy storage device corresponds to one bidirectional DC-DC module, and the second DC side of all DC-DC modules is connected to the DC side of the first energy storage converter.

[0029] In some alternative implementations, such as Figure 2 As shown, the containerized experimental platform for energy storage converter also includes a DC combiner cabinet, which is installed inside the container and is used to combine the second DC side of all bidirectional DC-DC modules and connect it to the DC side of the first bidirectional energy storage converter. Figure 2 In the diagram, PCS #1 is the first bidirectional energy storage converter, and PCS #2 is the second bidirectional energy storage converter.

[0030] Specifically, such as Figure 2 As shown, the containerized experimental platform for energy storage converters also innovatively incorporates a key component: a DC combiner cabinet. This DC combiner cabinet is designed strictly according to industrial-grade standards and is securely mounted within the container. Its internal modular electrical layout utilizes high-specification copper busbars and electrical connectors with excellent insulation performance to construct a stable and reliable DC power transmission network. During operation, the DC combiner cabinet plays a crucial role as the central hub for power aggregation, accurately aggregating the second DC side of all bidirectional DC-DC modules. During this aggregation process, the DC combiner cabinet monitors and balances the DC voltage and current of each branch in real time, ensuring the stability and safety of power transmission. Ultimately, it achieves a reliable connection with the DC side of the first bidirectional energy storage converter, laying a solid foundation for subsequent power conversion and distribution. This design not only optimizes the power transmission path within the experimental platform and reduces line losses but also significantly improves the integration and reliability of the entire system, facilitating efficient and stable experimental operations and data acquisition for researchers.

[0031] In some alternative implementations, such as Figure 2 As shown, the containerized experimental platform for energy storage converters also includes an AC combiner box, which is located inside the container and is used to combine the AC side of the first bidirectional energy storage converter and the AC side of the second bidirectional energy storage converter and input them into the power cabinet.

[0032] Specifically, such as Figure 2As shown, the containerized experimental platform for energy storage converters is also equipped with an AC combiner box. The AC combiner box, also installed within the container, has a high-strength metal shell with excellent electromagnetic shielding and protection performance, effectively resisting the influence of external electromagnetic interference and environmental factors on internal electrical components. The box incorporates an intelligent monitoring unit and a rapid protection device, which can monitor key parameters such as voltage, current, and frequency on the AC side in real time and quickly trigger protection actions in case of abnormalities. The core function of the AC combiner box is to efficiently combine the AC sides of the first and second bidirectional energy storage converters, and input the integrated AC power to the power cabinet through scientifically planned electrical connection lines. During this process, the AC combiner box performs precise processing such as phase synchronization and amplitude matching on the two AC power sources to ensure that the power quality input to the power cabinet meets experimental requirements, thereby providing a stable and reliable AC power supply for subsequent power application experiments, effectively improving the overall performance and experimental results of the experimental platform in the AC power processing and distribution stage.

[0033] For example, such as Figure 2 As shown, the sodium-ion battery's #2 PCS is provided by the manufacturer and installed inside the battery manufacturer's container. The output cable and BMS communication cable of the #2 bidirectional PCS are laid through cable trenches within the factory building to the AC combiner box inside the bidirectional PCS container. The other six types of energy storage batteries are connected to the DC distribution cabinet inside the bidirectional PCS container, and then connected to their respective matching bidirectional DC / DC converters. Finally, they are all connected to the bidirectional #1 PCS DC bus, and then connected to the AC combiner box through the AC side of #1 PCS. Both #1 and #2 PCS are connected in the AC combiner box inside the PCS container, and finally input to the unified power cabinet.

[0034] In some alternative implementations, Figure 2 In this system, the DC distribution cabinet serves as the connection hub between the bidirectional DC / DC converter and the energy storage battery. It comprises two main functional units: the energy storage battery access cabinet and the bidirectional DC / DC access cabinet, with a bus voltage range of 375-780V DC. Based on the insulation safety specifications for high-voltage DC systems, both cabinets are equipped with real-time insulation monitoring devices on their busbars. By dynamically monitoring the DC busbar-to-ground insulation resistance value, the system provides early warning of insulation degradation risks, effectively preventing damage to equipment and the system from short-circuit faults to ground.

[0035] In some alternative implementations, Figure 2In terms of fault protection design, the internal switches of the DC distribution cabinet adopt a segmented protection mechanism, and their settings can be flexibly adjusted according to system operating parameters. When equipment fails and the control circuit fails, the circuit breaker inside the cabinet can act quickly to achieve precise isolation of the fault point. In addition, to build a dual protection system, a DC fast-acting fuse is connected in series at the output of each bidirectional DC / DC circuit. When the system experiences an overcurrent condition and other protection functions fail, the fast-acting fuse will immediately cut off the fault circuit through the melting mechanism, preventing the equipment from burning out due to continuous overcurrent, while also preventing the fault from spreading to other parts of the system, thus maximizing the safety and reliability of system operation.

[0036] In some alternative implementations, the energy storage converter containerized test platform also includes a video monitoring system, which is installed inside the container and is used to continuously monitor all equipment inside the container at preset times.

[0037] Optionally, the video monitoring system equipped on the containerized experimental platform for energy storage converters is a key component in ensuring the safe and efficient operation of the experiment. This system is centered around multiple high-definition network cameras, systematically distributed throughout key corners of the container. The cameras employ low-light, wide dynamic range technology, enabling them to clearly capture the operating status of the equipment inside the container even in complex lighting conditions such as dim light or direct sunlight. For example, the video equipment is from Hikvision, specifically a network-type, high-definition full-color night vision remote monitoring device.

[0038] In terms of monitoring functions, the video surveillance system strictly adheres to preset times, providing uninterrupted real-time monitoring of all equipment within the enclosure. For energy storage converter equipment, the system closely monitors the operating parameters on its display screen, the status of indicator lights, and whether the wiring connections are loose or whether there is abnormal overheating. For various cables, the system focuses on monitoring for damage, aging, and smoke caused by overheating. For auxiliary equipment such as distribution cabinets, the system also constantly monitors the opening and closing status of the cabinet doors and the working status of the internal components.

[0039] The system also boasts powerful data processing capabilities. The collected video data is transmitted to the monitoring center server in real time and stored using advanced video compression algorithms, ensuring both video clarity and efficient storage space saving. Furthermore, the system supports rapid retrieval and playback of historical videos, allowing technicians to quickly trace equipment operation in case of problems.

[0040] In some alternative implementations, the containerized test platform for the energy storage converter also includes: fire alarm equipment, which is installed inside the container and is used to detect whether a fire has occurred inside the container; and a fire alarm controller, which is installed inside the container and is used to issue an alarm signal when a fire occurs.

[0041] Specifically, the container needs to be equipped with comprehensive, multi-layered fire alarm systems to establish a robust fire early warning and prevention system. Smoke detectors employ high-sensitivity photoelectric and ionization composite smoke detectors, evenly distributed across the top of the container. Their built-in intelligent detection chips can accurately identify different types of smoke particles, capturing even the slightest changes in smoke immediately. Temperature sensors include fixed-temperature and differential-temperature sensors. Fixed-temperature sensors are installed near heat-generating equipment such as energy storage converters and distribution cabinets, triggering an alarm immediately when the temperature reaches a preset threshold. Differential-temperature sensors are installed in areas with dense cabling; if the temperature rises rapidly within a short period, an alarm will be issued quickly.

[0042] The manual fire alarm device, also known as a manual fire alarm button, is installed at the container entrance and exit in a prominent location easily accessible to personnel. It features a robust and durable metal casing with a waterproof and dustproof membrane to ensure normal operation even in humid, dusty, or other challenging environments. Upon discovering a fire, personnel can quickly press the button to send an alarm signal directly to the fire alarm system.

[0043] The audible and visual alarm integrates a high-brightness flashing indicator light with a high-decibel speaker, installed at the four corners of the container's top, providing 360-degree coverage of the entire space. Upon receiving a fire alarm signal, the red indicator light flashes rapidly while a sharp alarm sound is emitted, using both visual and auditory stimuli to alert personnel to evacuate immediately.

[0044] The fire alarm controller, acting as the "brain" of the entire fire alarm system, is typically installed in a separate control cabinet inside the container and possesses powerful data processing and logical judgment capabilities. It receives and analyzes signals transmitted from devices such as smoke detectors, heat detectors, and manual alarms in real time. Once a fire is confirmed, it not only immediately activates the audible and visual alarms but also controls the activation of fire extinguishing devices. Simultaneously, it transmits the fire alarm information to a remote monitoring center via the network, facilitating timely deployment of rescue forces by management personnel.

[0045] In some optional implementations, the fire detection system inside the PCS container employs a dual-protection configuration. Two top-mounted photoelectric smoke detectors are high-sensitivity products, utilizing infrared scattering principles. Their built-in optical labyrinth design accurately captures the scattered light signals from smoke particles, triggering an alarm even at smoke concentrations as low as 0.01 dB / m³. They also feature a false alarm prevention algorithm, effectively distinguishing smoke from interfering factors such as dust and moisture. Two heat detectors are intelligent fixed-temperature and differential-temperature composite types. The fixed-temperature threshold is set at 60°C, triggering an alarm immediately when the temperature at the detection point reaches this threshold. The differential-temperature detection component sensitively senses the rate of temperature change, also issuing an alarm rapidly if the temperature rise exceeds 5°C per minute. The detectors are embedded in the container roof using fire-resistant sealant, ensuring detection effectiveness while preventing heat and smoke leakage.

[0046] In some alternative implementations, the containerized test platform for the energy storage converter also includes: an automatic fire suppression system housed within the container; and a gas fire extinguishing controller housed within the container, which is used to activate the automatic fire suppression system based on an alarm signal.

[0047] Optionally, the automatic fire suppression system is a heptafluoropropane automatic fire suppression system. The heptafluoropropane automatic fire suppression system adopts a magnetic suspension type and is installed at both ends of the top of the container. The cylinder is filled with heptafluoropropane extinguishing agent, and the automatic pressure relief device is placed next to the ventilation opening, which can cover all the equipment inside.

[0048] In some optional implementations, each container is equipped with a highly integrated fire alarm signal transmission system. Fire alarm signals, fire-fighting action signals, and fault signals are transmitted as standard switch-type electrical signals via dedicated fire-resistant cables to the overall fire alarm system of the park. This switch-type signal transmission method features high stability and strong anti-interference capabilities. Redundancy is employed during signal transmission, with dual-circuit lines. Even if one line fails, the other line can still ensure reliable signal transmission, effectively guaranteeing real-time monitoring of the status of each container by the park's fire alarm system.

[0049] In some optional implementations, the fire alarm controller / gas extinguishing controller installed on the left wall of the container entrance (small front door) is an integrated intelligent device with a 7-inch color touchscreen display that can display the status of each detector, alarm information, system parameters, etc. in real time. Its built-in dual-core processor has a data processing speed of up to 100,000 times per second, enabling it to quickly analyze and process signals transmitted by the detectors. Upon confirmation of a fire, it can issue a control command within 0.5 seconds. The controller also supports multiple communication protocols, allowing data interaction with the park's fire alarm system and other intelligent devices inside the container. The manual emergency start / stop button installed on the right side features a red mushroom-shaped design covered with a transparent protective cover. Operation is only possible after pressing the release button on the protective cover to prevent accidental triggering. The button material meets IP65 protection standards, providing waterproof, dustproof, and impact-resistant performance. Pressing the button immediately starts or stops the gas extinguishing system, providing emergency intervention for on-site personnel.

[0050] In some optional implementations, the alarm bells, gas release alarms, and fire audible and visual alarms related to the fire system are centrally located on one side of the container's small door, arranged in a triangular pattern. The alarm bells are high-decibel electric, with a volume reaching 120 decibels and strong sound penetration. The gas release alarms have dual audible and visual alert functions; when the gas extinguishing system is activated, a red indicator light flashes, and a voice prompt "Gas release, do not enter" is emitted. The fire audible and visual alarms use a combination of high-brightness flashing LED lights and a buzzer, with the lights flashing 120 times per minute to ensure immediate attention in various environments. These alarm devices are connected to the fire alarm controller via dedicated wiring within fireproof cable trays. When the controller issues an alarm command, the alarm devices activate synchronously, achieving comprehensive and multi-layered fire warnings.

[0051] In some optional implementations, when a fire alarm is triggered inside the container, the smoke detector first activates, sending a fire alarm signal and delaying the power outage. The automatic fire extinguishing suspended electric starter does not activate. When the heat detector alarms, the automatic fire extinguishing suspended electric starter activates, discharging heptafluoropropane extinguishing agent, activating the gas release alarm, illuminating the gas release light, and sending a fire-fighting action signal. During this time, personnel are prohibited from entering the container. Once the fire is extinguished, the automatic pressure relief device activates, and the heptafluoropropane extinguishing agent spraying ends.

[0052] In some alternative implementations, the energy storage converter containerized test platform also includes a temperature control device located inside the container to maintain a stable temperature inside the container.

[0053] Specifically, the battery container adopts a constant temperature and humidity design, with an integrated industrial air conditioning system to maintain the internal temperature at 23±5℃ (ensuring optimal operating conditions). Simultaneously, the container's air duct design ensures that all equipment operates within a suitable temperature range.

[0054] Optionally, the built-in industrial air conditioning system serves as the core for temperature and humidity control throughout the container. This system employs variable frequency compressor technology, enabling intelligent adjustment of cooling / heating power. It automatically adjusts its operating frequency based on actual temperature changes inside the container, ensuring temperature control accuracy of ±1℃. In cooling mode, the air conditioning unit absorbs heat from inside the container through the evaporator, which is then compressed by the compressor and dissipated by the condenser before being expelled outside. In heating mode, the system activates an electric auxiliary heating device, combining this with the compressor's reverse-cycle heating principle to rapidly increase the temperature inside the container. Furthermore, the system integrates high-precision temperature and humidity sensors to monitor environmental data inside the container in real time and feed this data back to the central control system, achieving closed-loop precise control of temperature and humidity. This ensures the internal ambient temperature remains constant at 23±5℃, creating optimal operating conditions for equipment such as the energy storage converter and battery pack.

[0055] Optionally, to ensure equipment heat dissipation, efficient thermal management is achieved through a scientific containerized air duct design. The air duct adopts a modular structure, consisting of a main air duct, branch air ducts, and air outlets. The main air duct is arranged along the length of the container at the top, employing a streamlined design to reduce wind resistance; the branch air ducts branch vertically from the main air duct, precisely corresponding to each heat-generating device, such as energy storage converters and power distribution cabinets, directly delivering cool air to the equipment's heat dissipation parts. The air outlets employ different types of louver designs according to the equipment's heat dissipation requirements, ensuring uniform airflow distribution. Simultaneously, adjustable-speed axial flow fans are installed within the air ducts, dynamically adjusting the fan speed according to the equipment's operating load. When the equipment load increases and heat generation increases, the fan automatically increases its speed to accelerate airflow and promptly remove the heat generated by the equipment; when the equipment is under light load or in standby mode, the fan speed decreases, reducing energy consumption while ensuring heat dissipation. This air duct design allows the surface temperature difference between various devices to be controlled within 5°C, effectively ensuring that all equipment operates stably within a suitable temperature range.

[0056] In some alternative implementations, the energy storage converter containerized test platform further includes a power supply unit located inside the container for supplying power to the various devices inside the container.

[0057] Specifically, the auxiliary power supply circuit inside the container must be connected to bidirectional PCS and other equipment for auxiliary power supply, including fire protection systems, temperature control systems, and lighting systems. It must be powered externally from the on-site substation transformer, with separate metering for the auxiliary system's power consumption. The distribution cabinet inside the container must have at least one power interface reserved.

[0058] In some optional implementations, the container's lighting system employs a dual-mode configuration to comprehensively ensure operational safety and monitoring needs. For basic lighting, explosion-proof LED lights are selected. These lights feature high-strength cast aluminum alloy housings, treated with a special process to form a dense explosion-proof coating. This coating can withstand internal explosion pressure and prevent explosion propagation, achieving an IP66 protection rating and effectively resisting dust and water mist. The lighting installation follows scientific lighting principles, distributed in a matrix pattern along the container's top central axis and side walls. This ensures uniform illumination across the entire space, eliminating blind spots and providing a stable and sufficient light source for high-definition video monitoring equipment. This guarantees clear visibility of critical information such as equipment operating status and wiring details, preventing blurry images and missed information due to insufficient light.

[0059] Emergency lighting systems are a crucial supplement to safety. Their core component is a fire emergency LED light with a built-in battery, installed in key locations such as container entrances / exits, stairwell corners, and above main passageways. A combination of recessed and wall-mounted installation methods ensures secure mounting without obstructing personnel passage. The emergency lighting system is equipped with an intelligent power failure detection module. When a main power supply failure is detected, a millisecond-level response mechanism immediately activates, automatically switching to battery power to ensure the emergency lights illuminate instantly. The battery uses high-performance lithium iron phosphate batteries, featuring high energy density, long cycle life, and strong resistance to overcharge and over-discharge. At a full charge, the emergency lights can maintain a brightness of at least 100 lumens and operate continuously for at least 90 minutes. This provides clear lighting guidance for maintenance personnel in the event of a sudden power outage, helping them quickly complete equipment checks and troubleshooting, while ensuring safe evacuation and significantly reducing the risk of tripping or bumping in dark environments.

[0060] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A containerized experimental platform for energy storage converters, characterized in that, The system includes a container body, and the container body is equipped with a DC power distribution cabinet, a first bidirectional energy storage converter, and a second bidirectional energy storage converter. A DC distribution cabinet is used to connect at least one two-stage energy storage device and, after voltage matching, connect to the DC side of the first bidirectional energy storage converter. The first bidirectional energy storage converter has its AC side connected to the AC bus; The second bidirectional energy storage converter has a DC side connected to a single-stage energy storage device and an AC side connected to an AC bus.

2. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, The DC distribution cabinet includes: a bidirectional DC-DC access cabinet and an energy storage device access cabinet. The bidirectional DC-DC access cabinet has at least one built-in bidirectional DC-DC module. The first DC side of each bidirectional DC-DC module is connected to a two-stage energy storage device through an energy storage device access cabinet, and the second DC side of each bidirectional DC-DC module is connected to the DC side of the first bidirectional energy storage converter.

3. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, The single-stage energy storage device includes a sodium-ion battery; The dual-stage energy storage device includes: a flywheel, a supercapacitor, a lithium iron phosphate battery, a vanadium redox flow battery, a solid-state lithium-ion battery, and an aqueous sodium-ion battery.

4. The containerized experimental platform for energy storage converters according to claim 2, characterized in that, Also includes: A DC combiner cabinet, which is installed inside the container, is used to combine the second DC side of all the bidirectional DC-DC modules and connect it to the DC side of the first bidirectional energy storage converter.

5. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, Also includes: An AC combiner box, which is located inside the container, is used to combine the AC side of the first bidirectional energy storage converter and the AC side of the second bidirectional energy storage converter and input them into the power cabinet.

6. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, Also includes: A video surveillance system is installed inside the container and is used to continuously monitor all equipment inside the container at preset times.

7. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, Also includes: Fire alarm equipment, which is installed inside the container, is used to detect whether a fire has occurred inside the container; A fire alarm controller, which is installed inside the container, is used to issue an alarm signal in the event of a fire.

8. The containerized experimental platform for energy storage converters according to claim 7, characterized in that, Also includes: An automatic fire suppression system is installed inside the container. A gas extinguishing controller, which is installed inside the container, is used to activate the automatic fire suppression system based on the alarm signal.

9. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, Also includes: A temperature control device is installed inside the container to maintain a stable temperature inside the container.

10. The containerized experimental platform for energy storage converters according to claim 1, characterized in that, Also includes: A power supply device is installed inside the container and is used to supply power to the various devices inside the container.

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