Hybrid power supply unit and hybrid power supply system

Abstract

This invention provides a hybrid power supply unit and hybrid power supply system that enables not only single-phase equipment but also three-phase equipment to operate independently during a power outage, while also improving expandability and versatility. [Solution] The three-phase equipment 2 includes a three-phase battery 21, a three-phase power conditioner 22, a three-phase transformer 23, and a three-phase distribution board 24. The single-phase equipment 3 includes a single-phase power conditioner 31, a single-phase battery 32, a single-phase transformer 33, and a single-phase distribution board 34. In the event of a power outage, three-phase power is supplied from the three-phase distribution board 24 to the three-phase battery 21, and single-phase power is supplied from the single-phase distribution board 34 to both the three-phase power conditioner 22 and the single-phase power conditioner 31.

Description

Technical Field

[0001] The present invention relates to a hybrid power supply unit and a hybrid power supply system capable of stably and homogenously supplying both three-phase power and single-phase power.

Background Art

[0002] Conventionally, a power supply system for supplying power generated by a renewable energy technology such as a solar panel has been proposed. For example, Japanese Patent Application Laid-Open No. 2007-274842 discloses a distributed power supply system that can output single-phase AC power by connecting a distributed power source to a grid power source during normal times and can supply three-phase AC power by the power from the distributed power source during a power outage of the grid power source (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In factories and the like, conventionally, three-phase power has mainly been used to stably operate large machines and the like. However, three-phase equipment for supplying three-phase power, unlike single-phase equipment used in houses, has a problem that it cannot operate independently during a power outage even if there is a storage battery.

[0005] In addition, conventional power supply systems, including the distributed power supply system described in Patent Document 1, are designed independently according to individual factories and the like, and are so-called custom-made products. For this reason, in order to suppress costs, the application range is limited, and it is difficult to expand, change functions, and add equipment and devices, etc., and there is also a problem of poor versatility.

[0006] The present invention was made to solve these problems and aims to provide a hybrid power supply unit and hybrid power supply system that can enable not only single-phase equipment but also three-phase equipment to operate independently during a power outage, while also improving expandability and versatility. [Means for solving the problem]

[0007] The hybrid power supply unit according to the present invention solves the problem of enabling not only single-phase equipment but also three-phase equipment to operate independently during a power outage, and improving expandability and versatility. For example, the hybrid power supply unit comprises a three-phase equipment for converting DC power generated by solar panels into three-phase power and supplying it to a three-phase load, and a single-phase equipment for converting DC power generated by solar panels into single-phase power and supplying it to a single-phase load, wherein the three-phase equipment is connected to the solar panels by a DC link and stores the DC power generated by the solar panels, a three-phase power conditioner for converting the DC power stored in the three-phase power conditioner into three-phase power, a three-phase transformer for converting the three-phase power output from the three-phase power conditioner into a predetermined voltage, and the three-phase The single-phase equipment includes a three-phase distribution board that distributes three-phase power output from a transformer to a three-phase load, and the single-phase equipment includes a single-phase power conditioner that converts DC power generated by the solar panels into single-phase power, a single-phase battery connected to the single-phase power conditioner that stores DC power before it is converted into single-phase power by the single-phase power conditioner, a single-phase transformer that converts the single-phase power output from the single-phase power conditioner to a predetermined voltage, and a single-phase distribution board that distributes the single-phase power output from the single-phase power conditioner and the single-phase transformer to a single-phase load, and in the event of a power outage, three-phase power is supplied from the three-phase distribution board to the three-phase battery, and single-phase power is supplied from the single-phase distribution board to both the three-phase power conditioner and the single-phase power conditioner.

[0008] Furthermore, in one aspect of the present invention, in order to solve the problem of ensuring the robustness and reliability of the system by enabling not only single-phase equipment but also three-phase equipment to operate independently even in emergencies, a backup power supply may be provided to supply single-phase power to the three-phase power conditioner and the single-phase power conditioner when, in the event of a power outage, the amount of charge stored in the single-phase battery is zero and the amount of power generated by the solar panels is so low that independent operation of the hybrid power supply unit is not possible.

[0009] Furthermore, in one aspect of the present invention, in order to solve the problem of preventing power supply from stopping even if a malfunction occurs in a set consisting of a three-phase power conditioner and a three-phase transformer in a three-phase system, the three-phase battery may have multiple output terminals, and multiple sets of the set consisting of the three-phase power conditioner and the three-phase transformer may be provided for each output terminal.

[0010] Furthermore, the hybrid power supply system according to the present invention has a hybrid power supply unit in any of the above-described embodiments and the solar panel, in order to solve the problem of enabling not only single-phase equipment but also three-phase equipment to operate independently during a power outage, and to improve expandability and versatility. [Effects of the Invention]

[0011] According to the present invention, not only single-phase equipment but also three-phase equipment can be operated independently during a power outage, and expandability and versatility can be improved. [Brief explanation of the drawing]

[0012] [Figure 1] This is a block diagram showing one embodiment of a hybrid power supply unit and a hybrid power supply system according to the present invention. [Figure 2] This is a block diagram showing the hybrid power supply unit and hybrid power supply system of this embodiment during a power outage. [Figure 3]This is a block diagram showing the hybrid power supply unit and hybrid power supply system of this embodiment in emergency situations. [Modes for carrying out the invention]

[0013] Hereinafter, an embodiment of the hybrid power supply unit and hybrid power supply system according to the present invention will be described with reference to the drawings.

[0014] As shown in Figure 1, the hybrid power supply system 10 of this embodiment includes a solar panel 11 for generating electricity using sunlight, and a hybrid power supply unit 1 that converts the DC power generated by the solar panel 11 into three-phase power and single-phase power, respectively, and supplies them to the three-phase load 25 and single-phase load 35, respectively. The following describes each of the components.

[0015] The solar panels 11 are for generating electricity using sunlight. In this embodiment, the solar panels 11 are configured to generate electricity from both sides, and multiple solar panels 11 are installed as a distributed power source according to the amount of power required by the three-phase load 25 and the single-phase load 35. The solar panels 11 can be silicon-based solar panels, chemical-based solar panels, organic-based solar panels, perovskite solar panels, etc.

[0016] The hybrid power supply unit 1 is designed to supply both three-phase and single-phase power. In this embodiment, as shown in Figure 1, the hybrid power supply unit 1 consists of a three-phase unit 2 for supplying three-phase power to a three-phase load 25, a single-phase unit 3 for supplying single-phase power to a single-phase load 35, and an emergency backup power supply 4, all housed in a container designed to withstand salt damage, snow accumulation, etc., and configured as a packaged standard product. The following describes each component.

[0017] (1) Three-phase equipment 2 The three-phase equipment 2 is equipment for converting the DC power generated by the solar panel 11 into three-phase power and supplying it to the three-phase load 25. In the present embodiment, as shown in FIG. 1, the three-phase equipment 2 includes a three-phase battery 21, a three-phase power conditioner 22 (three-phase PCS), a three-phase transformer 23, and a three-phase distribution board 24. Hereinafter, each component will be described.

[0018] The three-phase battery 21 stores the DC power generated by the solar panel 11. In the present embodiment, the three-phase battery 21 is composed of a DC (DC) link type battery and is connected to the solar panel 11 in a DC link manner. With this configuration, the power generated by the solar panel 11 can be stored as DC, enabling highly efficient self-consumption with reduced conversion losses to AC (three-phase power).

[0019] Also, in the present embodiment, the three-phase battery 21 has a function of automatically securing the power necessary for its own operation from the power it stores. For this reason, the three-phase battery 21 is activated by the power generated by the solar panel 11 during daytime (sunny days) in normal times. On the other hand, at night when the solar panel 11 does not generate power or during a power outage, it is activated by the single-phase power supplied from the single-phase equipment 3. As the three-phase battery 21, a lithium-ion battery, an all-solid-state battery, or the like can be adopted.

[0020] The three-phase power conditioner 22 converts DC power into AC three-phase power. In the present embodiment, the three-phase power conditioner 22 is connected to the output terminal of the three-phase battery 21, converts the DC power stored in the three-phase battery 21 into three-phase power, and outputs it to the three-phase transformer 23.

[0021] Also, in this embodiment, the three-phase power conditioner 22, like the three-phase storage battery 21, is activated by the power generated by the solar panel 11 during daytime (sunny days) in normal times. On the other hand, it is designed to be activated by the single-phase power supplied from the single-phase equipment 3 at night or during a power outage when the solar panel 11 does not generate power.

[0022] The three-phase transformer 23 is for converting three-phase power to a predetermined voltage. In this embodiment, the three-phase transformer 23 is composed of a step-down transformer, which reduces the 420V three-phase power output from the three-phase power conditioner 22 to 200V and outputs it to the three-phase distribution board 24.

[0023] In this embodiment, as shown in FIG. 1, the three-phase storage battery 21 has a plurality (two) of output terminals, and a plurality of sets each consisting of a three-phase power conditioner 22 and a three-phase transformer 23 are provided for each output terminal. This provides a safety measure such that even if a problem occurs in any one set, power can be supplied from other sets. However, the configuration is not limited to this and may be changed as appropriate.

[0024] For example, a three-phase power conditioner 22 may be installed at each of the plurality of output terminals provided on the three-phase storage battery 21, and the outputs from each three-phase power conditioner 22 may be integrated and received by a single three-phase transformer 23. Alternatively, the outputs from the plurality of output terminals provided on the three-phase storage battery 21 may be integrated and received by a single three-phase power conditioner 22, and the output from the three-phase power conditioner 22 may be received by a single three-phase transformer 23.

[0025] The three-phase distribution board 24 distributes three-phase power to three-phase loads 25. In this embodiment, the three-phase distribution board 24 distributes the three-phase power (200V) output from the three-phase transformer 23 to three-phase loads 25 such as factories. Furthermore, in this embodiment, as shown in Figure 2, in the event of a power outage, the three-phase distribution board 24 supplies three-phase power to the three-phase battery 21, enabling independent operation.

[0026] In this embodiment, the three-phase distribution board 24 is configured as a full-load distribution board that supplies three-phase power to all three-phase loads 25 during a power outage, but it is not limited to this, and may be configured as a specific-load distribution board that supplies three-phase power only to specific three-phase loads 25 during a power outage.

[0027] (2) Single-phase equipment 3 The single-phase equipment 3 is equipment for converting DC power generated by the solar panels 11 into single-phase power and supplying it to the single-phase load 35. In this embodiment, as shown in Figure 1, the single-phase equipment 3 includes a single-phase power conditioner 31 (single-phase PCS), a single-phase battery 32, a single-phase transformer 33, and a single-phase distribution board 34. Each component will be described below.

[0028] The single-phase power conditioner 31 converts DC power into AC single-phase power. In this embodiment, the single-phase power conditioner 31 is connected to the solar panel 11 and converts the DC power generated by the solar panel 11 into single-phase power, outputting it to the single-phase transformer 33 and the single-phase distribution board 34, respectively. The single-phase power conditioner 31 also outputs any surplus power when the amount of power generated by the solar panel 11 exceeds the power consumption of the single-phase load 35 to the single-phase battery 32 for storage.

[0029] The single-phase battery 32 stores the DC power generated by the solar panels 11. In this embodiment, the single-phase battery 32 is connected to the single-phase power conditioner 31 and stores the DC power before it is converted to single-phase power by the single-phase power conditioner 31. In this embodiment, the single-phase battery 32 is also equipped with a DC / DC converter (not shown), which, under the control of the single-phase power conditioner 31, converts any surplus high-voltage DC power generated by the solar panels 11 to a low voltage before storing it.

[0030] Furthermore, in this embodiment, the single-phase battery 32 has a function to automatically secure the power necessary for its own operation from the power it has stored. Therefore, during normal daytime conditions (sunny weather), the single-phase battery 32 is started by the power generated by the solar panel 11. On the other hand, at night or during a power outage when the solar panel 11 is not generating power, it is started by the single-phase power stored in the single-phase battery 32.

[0031] The single-phase transformer 33 converts single-phase power to a predetermined voltage. In this embodiment, the single-phase transformer 33 is composed of a full-load transformer and is configured to step up the 100V single-phase power output from the single-phase power conditioner 31 to 200V and output it to the single-phase distribution board 34.

[0032] In this embodiment, to ensure that the hybrid power supply unit 1 can operate reliably even during a power outage, two sets of single-phase power conditioners 31, single-phase batteries 32, and single-phase transformers 33 are provided, as shown in Figure 1. This provides a safety measure that ensures power is supplied from the other set even if one set malfunctions. However, the configuration is not limited to this, and the number of components may be increased or decreased as appropriate.

[0033] The single-phase distribution board 34 distributes single-phase power to single-phase loads 35. In this embodiment, the single-phase distribution board 34 distributes the single-phase power (100V) output from the single-phase power conditioner 31 and the single-phase power (200V) output from the single-phase transformer 33 to single-phase loads 35 such as factories and offices. Furthermore, in this embodiment, as shown in Figure 2, in the event of a power outage, the single-phase distribution board 34 supplies single-phase power to both the three-phase power conditioner 22 and the single-phase power conditioner 31, enabling them to operate independently.

[0034] In this embodiment, the single-phase distribution board 34 is configured as a full-load distribution board that supplies single-phase power to all single-phase loads 35 during a power outage, but it is not limited to this, and may be configured as a specific-load distribution board that supplies single-phase power only to specific single-phase loads 35 during a power outage.

[0035] (3) Backup power supply 4 The backup power supply 4 is intended to prevent the power supply from the hybrid power supply unit 1 from stopping even in emergencies. Here, an emergency means a situation in which, during a power outage, the charge in the single-phase battery 32 is zero, and the amount of power generated by the solar panels 11 is so low that the hybrid power supply unit 1 cannot operate independently.

[0036] In this embodiment, the backup power supply 4 is composed of a generator capable of generating power using a gas cylinder and outputs single-phase power. As shown in Figure 3, the backup power supply 4 supplies single-phase power to the three-phase power conditioner 22 and the single-phase power conditioner 31 via the single-phase distribution board 34.

[0037] Furthermore, in this embodiment, the hybrid power supply unit 1 is equipped with a monitoring and control device (not shown) for monitoring and controlling the power input and output of each piece of equipment. This monitoring and control device is connected to all three-phase power conditioners 22 and single-phase power conditioners 31 and monitors the input and output data of each piece of equipment. It then automatically performs control such as shutting off load power that falls outside the performance range of each piece of equipment with a breaker or suppressing it with an optimizer. For this reason, the backup power supply 4 is also configured to supply power to the monitoring and control device in emergencies.

[0038] The backup power supply 4 can be increased or decreased as appropriate depending on the size and requirements of the factory or other facility, which will have three-phase loads 25 and single-phase loads 35. Furthermore, the backup power supply 4 is not a mandatory component of the hybrid power supply unit 1 and may not be required if sufficient charge can be secured from the single-phase battery 32. In general offices and factories, the number of equipment components is determined based on cost-effectiveness. On the other hand, in facilities where human lives are at stake (hospitals, welfare facilities, government offices, etc.), the number of equipment components installed will ensure safety.

[0039] Next, the operation of the hybrid power supply unit 1 and the hybrid power supply system 10 of this embodiment will be described.

[0040] As described above, the hybrid power supply unit 1 of this embodiment is configured as a packaged standard product. Therefore, by installing multiple hybrid power supply units 1 in parallel and / or series as needed, the entire system can be freely designed and expanded. Furthermore, the hybrid power supply unit 1 of this embodiment does not require design tailored to individual sites and can be applied as is to various sites, thus reducing design costs and providing high versatility.

[0041] Furthermore, the hybrid power supply unit 1 and hybrid power supply system 10 of this embodiment are fully automated by the monitoring and control device described above and are configured to be manageable by remote communication. Therefore, technicians only need to be dispatched during periodic maintenance, and there is no need to have administrators or other personnel permanently stationed there, thus eliminating human resource risks and reducing operating costs.

[0042] When supplying both single-phase and three-phase power under normal conditions using the hybrid power supply unit 1 and hybrid power supply system 10 of this embodiment, as shown in Figure 1, in the three-phase equipment 2, the three-phase battery 21 stores the DC power generated by the solar panel 11 as DC power. This suppresses conversion losses to three-phase power (AC), enabling highly efficient self-consumption.

[0043] Next, the three-phase power conditioner 22 converts the DC power output from the three-phase battery 21 into three-phase power, and the three-phase transformer 23 converts the three-phase power output from the three-phase power conditioner 22 into a predetermined voltage. This provides three-phase power that can be supplied to the three-phase load 25. The three-phase distribution board 24 then distributes this converted and transformed three-phase power to the three-phase load 25.

[0044] In this embodiment, as a safety measure, multiple sets of three-phase power conditioners 22 and three-phase transformers 23 are provided for each of the multiple output terminals of the three-phase battery 21. This prevents power supply interruption, as power will be supplied from the other sets even if one set malfunctions.

[0045] On the other hand, in the single-phase equipment 3, the single-phase power conditioner 31 converts the DC power generated by the solar panels 11 into single-phase power and outputs it to the single-phase transformer 33 and the single-phase distribution board 34, respectively. The single-phase transformer 33 then converts the single-phase power output from the single-phase power conditioner 31 into a predetermined voltage. As a result, single-phase power of different voltages is output to the single-phase distribution board 34.

[0046] Furthermore, if the amount of electricity generated by the solar panels 11 exceeds the amount of electricity consumed by the single-phase load 35, the single-phase power conditioner 31 outputs the surplus power to the single-phase battery 32. As a result, the single-phase battery 32 stores the DC power generated by the solar panels 11 as DC power. This suppresses conversion losses to single-phase power (AC), enabling highly efficient self-consumption.

[0047] The single-phase distribution board 34 then distributes the single-phase power input from the single-phase transformer 33 and the single-phase distribution board 34 to various single-phase loads 35 according to the voltage. As described above, under normal conditions, the hybrid power supply unit 1 supplies both single-phase and three-phase power.

[0048] Next, when using the hybrid power supply unit 1 and hybrid power supply system 10 of this embodiment to supply both single-phase and three-phase power during a power outage, as shown in Figure 2, in the three-phase equipment 2, the three-phase distribution board 24 supplies three-phase power to the three-phase battery 21, while the single-phase distribution board 34 supplies single-phase power to the three-phase power conditioner 22. In this way, during a power outage, the three-phase equipment 2 operates independently by receiving power from the single-phase equipment 3.

[0049] On the other hand, in the single-phase equipment 3, as shown in Figure 2, the single-phase distribution board 34 also supplies single-phase power to the single-phase power conditioner 31. As a result, the single-phase equipment 3 can operate independently even during a power outage. In summary, even during a power outage, the hybrid power supply unit 1 can enable independent operation of not only the single-phase equipment 3 but also the three-phase equipment 2, making it possible to supply both single-phase and three-phase power.

[0050] Next, when using the hybrid power supply unit 1 and hybrid power supply system 10 of this embodiment to supply both single-phase and three-phase power in an emergency, as shown in Figure 3, in the three-phase equipment 2, the single-phase distribution board 34, which receives single-phase power from the backup power supply 4, supplies single-phase power to the three-phase power conditioner 22. As a result, in the event of a power outage, the three-phase equipment 2 operates independently by being powered from the single-phase equipment 3.

[0051] On the other hand, in the single-phase equipment 3, as shown in Figure 3, the single-phase distribution board 34, which receives single-phase power from the backup power supply 4, also supplies single-phase power to the single-phase power conditioner 31. As a result, even in an emergency, the single-phase equipment 3 can operate independently. In summary, even in an emergency, the hybrid power supply unit 1 can enable independent operation of not only the single-phase equipment 3 but also the three-phase equipment 2, thus enabling the supply of both single-phase and three-phase power.

[0052] According to this embodiment, the following effects are achieved. 1. In the event of a power outage, not only the single-phase equipment 3 but also the three-phase equipment 2 can be operated independently, enabling a stable and uniform supply of both single-phase and three-phase power. In this respect, existing renewable energy sources (solar, wind, hydro, geothermal, biomass engines, etc.) generate power physically using photoconversion panels, motors, diesel engines, heat exchangers, etc., and their power generation is affected by environmental changes such as temperature fluctuations, light intensity fluctuations, wind pressure fluctuations, water pressure fluctuations, heat fluctuations, and combustion fluctuations, resulting in variability and instability. 2. Because it is configured as a packaged, standard product, design costs can be reduced, and expandability and versatility can be improved. Here, expandability means that by understanding the power consumption situation of factories, etc., and introducing the required number of standardized hybrid power supply units 1 as the minimum unit, it becomes possible to design a standardized design with optimal approximate values ​​tailored to the situation without the need for individual design, and the equalization of equipment performance, compatibility between units, and consistency of electrical quality can be easily and safely achieved. Furthermore, versatility means that the hybrid power supply system 10 is a hybrid power supply system that synchronously and stably supplies three-phase power → power supply and single-phase power → general lighting power supply, and can operate large machinery, as well as lighting and machine control devices. 3. Since repair and maintenance work can be performed on each hybrid power supply unit, the risk of power supply interruption can be reduced. 4. The electricity generated by the solar panels 11 can be stored and controlled, and power can be supplied even during power outages. Therefore, if proper maintenance and replacement are carried out, power can be supplied almost indefinitely without the need for other fuels. 5. By fully automating the process, human risk is eliminated and operating costs can be reduced. 6. It is possible to build an environmentally friendly system that can stably supply green electricity that does not require fossil fuels and does not emit carbon dioxide. 7. Even in emergencies, not only the single-phase equipment 3 but also the three-phase equipment 2 can be operated independently, ensuring the robustness and reliability of the system. 8. In the three-phase equipment 2, even if a malfunction occurs in the set consisting of the three-phase power conditioner 22 and the three-phase transformer 23, it is possible to prevent the power supply from being interrupted. 9. In the single-phase equipment 3, even if a malfunction occurs in the set consisting of the single-phase power conditioner 31, the single-phase battery 32, and the single-phase transformer 33, it is possible to prevent the power supply from being interrupted. 10. Hybrid power supply unit 1 houses its equipment in a shed that is resistant to salt damage, snow, etc., so it can be installed anywhere in the country, including coastal areas.

[0053] It should be noted that the hybrid power supply system 10 according to the present invention is not limited to the embodiments described above and can be modified as appropriate. For example, although not shown in Figures 1 to 3, a battery input box equipped with a lightning protection breaker and an optimizer for controlling DC power may be provided between the solar panel 11 and the three-phase battery 21.

[0054] Furthermore, an automatic changeover switch may be provided between the single-phase power conditioner 31 and the single-phase transformer 33 and the single-phase distribution board 34 to automatically switch to independent operation in the event of a power outage. In addition, a manual power changeover switch may be provided between the backup power supply 4 and the single-phase distribution board 34 to manually switch the power supply. [Industrial applicability]

[0055] The hybrid power supply unit 1 according to the present invention primarily targets the smallest power scale (less than 10kW to 50kW / h) within the grid-connected category under the Electricity Business Act. It can be used as a unitized power supply box to house renewable energy-related power generation equipment, communication control equipment, measuring instruments, etc., in the minimum necessary area and volume, and to operate them safely and in an optimal environment.

[0056] Furthermore, by connecting hybrid power supply units 1 in parallel and / or directly, it is possible to increase the scale of power supply to more than 50 kW / h. While there is no limit to the number of connections, if there are limitations on the installation area of ​​the facility, the optimal design for scaling up will be tailored to the specific facility.

[0057] Furthermore, standard manufacturer-specified electrical equipment and custom-designed products differ in their performance evaluation values ​​(IP○○) for dustproof and watertight resistance in their respective operating environments. Additionally, most equipment susceptible to salt damage is prohibited from being installed within 1-3 km of the coast, and installations within these coastal areas are generally not covered by the equipment manufacturers' product warranties.

[0058] However, many factory areas requiring the installation of equipment and machinery are located in coastal areas. Therefore, by designing the hybrid power supply unit 1 to operate safely and under optimal conditions (such as resistance to salt damage), it is possible to expand the area in which it can be installed, and it is expected to become an indispensable part of power supply systems in the future.

[0059] Furthermore, the ventilation rate inside the hybrid power supply unit 1 is set to 5 times, which is the rate recommended by the Building Standards Act (electrical room). In order to maintain an indoor temperature of 40°C or less as stipulated by the same law, a powerful mechanical ventilation system and a heating and cooling air conditioner are installed, creating an optimal operating environment without activating the safety features of the equipment and the main unit. [Explanation of symbols]

[0060] 1 Hybrid Power Supply Unit 10 Hybrid Power System 11 Solar panels 2 Three-phase equipment 21 Three-phase battery 22 Three-phase power conditioner 23 Three-phase transformers 24 Three-phase distribution board 25 Three-phase load 3. Single-phase equipment 31 Single-phase power conditioner 32 Single-phase battery 33 Single-phase transformer 34 Single-phase distribution board 35 Single-phase load 4. Backup power supply

Claims

1. A three-phase power system for converting DC power generated by solar panels into three-phase power and supplying it to a three-phase load, A single-phase power supply system for converting DC power generated by solar panels into single-phase power and supplying it to a single-phase load, A hybrid power supply unit equipped with, The aforementioned three-phase equipment is A three-phase battery connected to the aforementioned solar panel via a DC link system, which stores the DC power generated by the solar panel, A three-phase power conditioner that converts the DC power stored in the aforementioned three-phase battery into three-phase power, A three-phase transformer that converts the three-phase power output from the aforementioned three-phase power conditioner to a predetermined voltage, A three-phase distribution board that distributes the three-phase power output from the aforementioned three-phase transformer to three-phase loads, It has, The aforementioned single-phase equipment is A single-phase power conditioner that converts the DC power generated by the aforementioned solar panels into single-phase power, A single-phase battery connected to the aforementioned single-phase power conditioner, which stores DC power before it is converted to single-phase power by the aforementioned single-phase power conditioner, A single-phase transformer that converts the single-phase power output from the single-phase power conditioner into a predetermined voltage, A single-phase distribution board that distributes the single-phase power output from the single-phase power conditioner and the single-phase transformer to single-phase loads, It has, A hybrid power supply unit in which, in the event of a power outage, three-phase power is supplied from the three-phase distribution board to the three-phase battery, and single-phase power is supplied from the single-phase distribution board to both the three-phase power conditioner and the single-phase power conditioner.

2. The hybrid power supply unit according to claim 1, wherein, in the event of a power outage, when the amount of charge stored in the single-phase battery is zero and the amount of power generated by the solar panels is so low that the hybrid power supply unit cannot operate independently, a backup power supply is provided to supply single-phase power to the three-phase power conditioner and the single-phase power conditioner.

3. The aforementioned three-phase battery has multiple output terminals, The hybrid power supply unit according to claim 1, wherein multiple sets of the three-phase power conditioner and the three-phase transformer are provided for each output terminal.

4. A hybrid power supply unit according to any one of claims 1 to 3, The aforementioned solar panel, A hybrid power supply system.

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