High-integration energy storage container capable of meeting diversified load requirements

Abstract

The utility model discloses a high-integration energy storage container meeting diversified load requirements, and the container is internally provided with a photovoltaic DC-DC converter, a frequency converter, a PCS bidirectional converter, an energy storage PACK, an electrical cabinet, a fire protection part and other key components, and is in a four-layer control architecture layout. The photovoltaic DC-DC converter converts photovoltaic energy and stores the converted photovoltaic energy in the energy storage PACK, the PCS and the frequency converter adapt to different load requirements, the electrical cabinet guarantees circuit safety, and the fire-fighting part guarantees safe operation. Through cooperative work of all the components, efficient and comprehensive utilization of energy is achieved, the system can adapt to various loads such as an oil pumping unit, a heating rod and a photo-thermal furnace, the load efficiency and the power factor are improved, safety and stability of a power grid are guaranteed, space is reasonably utilized, investment is saved, and a green zero-carbon micro-grid system is constructed.

Description

Technical Field

[0001] This utility model is a highly integrated energy storage container that meets diverse load requirements. Background Technology

[0002] With the development of zero-carbon microgrid systems, the requirements for energy storage equipment are increasing. Traditional energy storage containers have relatively limited functions and suffer from problems such as low energy utilization efficiency, insufficient power supply reliability, and inability to effectively integrate renewable energy sources when dealing with microgrid systems containing various loads with different characteristics.

[0003] For example, when dealing with photovoltaic energy (characterized by its environmental friendliness, intermittency, and low utilization rate), the lack of effective conversion and storage mechanisms makes it difficult to fully realize its role in microgrid systems. Furthermore, for diverse loads such as oil pumping unit loads (characterized by periodic fluctuations, low power factor, and low efficiency), heating rod loads (resistive loads requiring frequency conversion regulation), and solar thermal furnaces (high power supply reliability and rapid load adjustment), traditional energy storage devices cannot adequately meet their different needs, thus limiting the overall stability and economic efficiency of the microgrid system. Utility model content:

[0004] This utility model provides a highly integrated energy storage container that meets diverse load requirements.

[0005] A highly integrated energy storage container that meets diverse load requirements includes a container body, within which a four-layer control architecture is configured, from bottom to top as follows:

[0006] Basic Energy Layer: This layer includes energy storage battery banks for storing electrical energy. It also features a photovoltaic DC-DC converter with MPPT (Maximum Power Transmission Point) function. Its input can be directly connected to photovoltaic panels, maximizing the power conversion of the DC power generated by the photovoltaic cells to meet load demands. Excess energy is used to charge the energy storage battery banks, thus achieving effective storage of photovoltaic power.

[0007] Power regulation layer: Equipped with a bidirectional inverter for converting DC to AC power. This layer can regulate the power output of the energy storage battery pack according to load demand, ensuring the stability and reliability of the output power.

[0008] Load adaptation layer: Dedicated adaptation circuits are provided for different types of loads. For periodically fluctuating, low power factor, and low-efficiency loads such as oil pumping unit loads, a power factor correction circuit is provided to improve their power factor and reduce energy waste; for resistive loads requiring frequency conversion regulation, such as heating rod loads, a frequency converter is configured to achieve precise power regulation; for loads requiring high power supply reliability and rapid adjustment, such as solar thermal furnaces, a fast-response switch and a backup power supply switching circuit are provided to ensure the continuity and reliability of power supply.

[0009] Intelligent Control Layer: This layer integrates a microgrid control system. This system uses sensors to monitor in real time the operating status of various devices within the container, the power level of the energy storage battery packs, the power demand of the load, and the power generation of the photovoltaic cells. Based on this information, the microgrid control system intelligently controls the entire energy storage container, achieving optimized energy allocation and efficient utilization.

[0010] The AC output terminal of the bidirectional inverter is connected to the load adaptation layer to provide power-regulated electrical energy to various other loads.

[0011] To save space and improve space utilization, multiple photovoltaic DC-DC converters are arranged in an array on the upper left side of the container body, and multiple frequency converters are arranged in an array on the lower left side of the container body. An electrical cabinet is installed between the photovoltaic DC-DC converters and the energy storage PACK.

[0012] To improve the overall stability of the device, a fire suppression system is installed on the right side of the energy storage PACK, and a heat dissipation unit is installed between multiple energy storage PACKs.

[0013] Based on a modular design concept, the equipment inside the container is arranged in layers, and the frequency converter is installed in a pull-out drawer.

[0014] The output of the photovoltaic DC-DC converter is connected to the bus of the energy storage battery pack, storing the excess converted energy into the battery pack. The bus of the energy storage battery pack is connected to a bidirectional inverter, and the AC output of the bidirectional inverter is connected to other load adaptation layers to provide adapted power to various other loads.

[0015] In terms of energy storage control, a combiner cabinet is used to combine the photovoltaic input to improve system stability and safety. Simultaneously, the AC / DC conversion PCS (Power Conversion System) is placed inside the AC electrical cabinet to achieve efficient power conversion and control. Furthermore, to accurately adapt to the diverse load requirements of electric heating rods, a medium-frequency cabinet is specially configured, which contains a medium-frequency converter and transformer to convert electrical energy into medium-frequency power suitable for the operation of the electric heating rods, effectively improving heating efficiency.

[0016] Beneficial effects:

[0017] In terms of energy utilization, the integration of photovoltaic energy and energy storage systems effectively solves the intermittency problem of photovoltaics, improves its utilization rate, and achieves complementary and efficient comprehensive utilization of energy. For diverse loads, it can adapt to the periodic fluctuations of oil pumping unit loads, the frequency conversion requirements of heating rod loads, and the high reliability requirements of solar thermal furnaces, improving the efficiency of various loads and reducing energy consumption through optimized control.

[0018] The innovative four-layer control architecture simplifies complex processes and enhances the system's intelligence. During operation, it accurately monitors and intelligently adjusts based on external environmental conditions, fully utilizing energy under favorable conditions and avoiding unfavorable conditions to ensure stable operation, achieving extreme high efficiency and energy saving, and significantly improving the overall load efficiency and power factor.

[0019] A well-designed power supply structure effectively ensures the safe and stable operation of the power grid, meeting its basic requirements and reducing the risk of failure. Simultaneously, the rational allocation of space in the layout ensures a clear and organized equipment arrangement, facilitating operation and maintenance, improving space utilization, effectively saving investment costs, and promoting the development of green zero-carbon microgrid systems, resulting in significant economic and environmental benefits. Attached Figure Description

[0020] Figure 1 This is a side view of the energy storage section of a highly integrated energy storage container;

[0021] Figure 2 This is a top view of a highly integrated energy storage container;

[0022] Figure 3 This is a side view of a highly integrated energy storage container;

[0023] Figure 4 This is a side view schematic diagram of the electrical components of a highly integrated energy storage container;

[0024] 1. Photovoltaic DC-DC converter 2. Frequency converter 3. Energy storage PACK 4. Bidirectional inverter PCS 5. Electrical cabinet 6. Fire protection section. Detailed Implementation

[0025] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0026] A highly integrated energy storage container that meets diverse load requirements mainly consists of the container body and several key internal components.

[0027] Multiple photovoltaic DC-DC converters 1 are arranged in an array on the upper left side of the container body. Their inputs are connected to external photovoltaic panels. When sunlight shines on the photovoltaic cells to generate DC power, the photovoltaic DC-DC converters 1 convert the input DC power. For example, they convert photovoltaic DC power of different voltage levels and instability into a stable DC voltage suitable for charging the energy storage PACK3, thereby effectively storing photovoltaic energy in the energy storage system and providing green energy support for the entire microgrid system.

[0028] Multiple frequency converters 2 are arranged in an array on the lower left side of the container body. For resistive loads requiring frequency conversion regulation, such as heating rod loads, the frequency converters precisely adjust the output frequency and voltage according to the instructions of the microgrid control system. For example, during the heating rod start-up phase, the frequency converters can provide lower frequency and voltage power to achieve soft start and avoid the impact of inrush current on the equipment and power grid; during operation, the frequency is adjusted in real time according to heating demand to precisely control the heating power, improve energy utilization efficiency, and meet the frequency conversion regulation requirements of the load.

[0029] The energy storage PACK3 is located inside the container and is connected to the photovoltaic DC-DC converter 1 and the bidirectional inverter via a DC bus. As an energy storage unit, it supplies power to the load and stores electrical energy when photovoltaic energy is abundant, and releases electrical energy when load demand exceeds photovoltaic power supply capacity or when there is no sunlight. For example, in situations where photovoltaic energy is insufficient, such as at night or on cloudy days, the energy storage PACK continuously supplies power to loads such as oil pumping units and solar thermal furnaces, ensuring normal operation of the loads and effectively solving the problems of intermittency and instability of renewable energy, thus maintaining the power balance of the microgrid system.

[0030] The electrical cabinet is located between the photovoltaic DC-DC converter 1 and the energy storage PACK 3. It plays a crucial role in controlling and protecting the circuits. For example, the circuit breakers, contactors, and other electrical components inside the cabinet can control the on / off state of the circuit, preventing damage to the equipment from faults such as overcurrent and overvoltage. At the same time, the meters, sensors, and other devices inside the cabinet can monitor circuit parameters, providing data support for the microgrid control system and ensuring the electrical safety and stable operation of the entire system.

[0031] In practical applications, the photovoltaic cells are first connected to the input terminal of the photovoltaic DC-DC converter 1 inside the energy storage container. When there is sunlight, the photovoltaic cells generate direct current, which is then converted by the photovoltaic DC-DC converter 1 into a voltage and current suitable for charging the energy storage battery pack.

[0032] Under the monitoring and management of the microgrid control system, the energy storage battery pack converts DC power to AC power via a bidirectional inverter according to load demand. Power regulation, frequency conversion control, and power factor correction are then performed at the load adaptation layer before supplying power to various loads. The microgrid control system collects real-time operating data from each device, such as the energy storage battery pack's charge level, load power changes, and photovoltaic cell power generation, and intelligently controls each layer of equipment according to preset control strategies.

[0033] For example, when sunlight is abundant and the battery bank's charge is low, photovoltaic power is preferentially stored in the battery bank; when load demand suddenly increases, the bidirectional inverter is controlled to increase output power; when an anomaly is detected in a certain type of load, the parameters of the corresponding adapter circuit are adjusted in a timely manner or a fault alarm is triggered. In this way, this invention can effectively meet the diverse load requirements of a zero-carbon microgrid system, achieving efficient, stable, and reliable energy supply.

[0034] The entire electrical system provides mains power (using as little mains power as possible after startup) and energy storage via photovoltaic grid connection and energy storage, supplying power to different loads such as the solar thermal furnace, oil pumping unit, and heating rods. The electrical compartment of the container features large, high-protection-level ventilation louvers and air duct design to ensure timely heat dissipation, avoiding the need for air conditioning, reducing load, and further meeting the design requirements of a zero-carbon microgrid.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highly integrated energy storage container that meets diverse load requirements, characterized in that, The container body includes a basic energy layer, a power regulation layer, a load adaptation layer, and an intelligent control layer inside the container body. The basic energy layer includes an energy storage battery pack and a photovoltaic DC-DC converter. The input end of the photovoltaic DC-DC converter is used to connect to the photovoltaic cells, and the output end is connected to the bus of the energy storage battery pack and all DC loads. The DC power generated by the photovoltaic cells is first supplied to the load, and the excess power is converted and stored in the energy storage battery pack. The power regulation layer includes a bidirectional inverter, which is connected to the DC bus of the energy storage battery pack to realize the conversion of electrical energy between DC and AC and regulate the output power. The load adaptation layer has adaptation circuits for different types of loads, including several frequency converters; The intelligent control layer integrates a microgrid control system, which is connected to the devices in each layer through communication lines. It is used to monitor the operating status of each device, the power of the energy storage battery pack, the power demand of the load, and the power generation of the photovoltaic panels, and to control the entire energy storage container based on the above information.

2. The highly integrated energy storage container that meets diverse load requirements according to claim 1, characterized in that, Multiple photovoltaic DC-DC converters are arranged in an array on the upper left side of the container body, and multiple frequency converters are arranged in an array on the lower left side of the container body.

3. The highly integrated energy storage container that meets diverse load requirements according to claim 1, characterized in that, An electrical cabinet is installed between the DC bus and the energy storage PACK.

4. A highly integrated energy storage container that meets diverse load requirements according to claim 1, characterized in that, The energy storage PACK has a fire protection section on the right side.

5. A highly integrated energy storage container that meets diverse load requirements according to claim 1, characterized in that, The equipment inside the container is arranged in layers, and the frequency converter is installed in a pull-out drawer.

6. A highly integrated energy storage container that meets diverse load requirements according to claim 1, characterized in that, The AC output terminal of the bidirectional inverter is connected to the load adaptation layer to provide power-regulated electrical energy to various loads.

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