Novel distributed energy storage self-contained power supply device

Abstract

The utility model relates to a novel distributed energy storage self-contained power supply device, which comprises a photovoltaic power generation unit, an energy storage unit, a direct current feeder unit, an emergency lighting unit and an uninterruptible power supply unit, and is characterized in that a first input end of the direct current feeder unit is connected with an alternating current bus of a power distribution room, so that the alternating current bus of the power distribution room distributes power to the direct current feeder unit; the energy storage unit comprises a first circuit and a second circuit; the input end of the first circuit is connected with the output end of the photovoltaic power generation unit, the output end of the first circuit is connected with the second input end of the direct-current feeder unit, the input end of the emergency lighting unit and the input end of the uninterruptible power supply unit, and the first circuit is used for distributing power to the direct-current feeder unit, the emergency lighting unit and the uninterruptible power supply unit; the input end of the second circuit is connected with an alternating current bus of the distribution room, the output end of the second circuit is connected with the input end of the first circuit, the input end of the emergency lighting unit and the input end of the uninterruptible power supply unit, and the second circuit is used for charging the first circuit and distributing power to the emergency lighting unit and the uninterruptible power supply unit.

Description

Technical Field

[0001] This disclosure relates to the field of power supply technology, and in particular to a novel distributed energy storage self-contained power supply device. Background Technology

[0002] Under the global goal of carbon neutrality, clean energy sources such as wind and solar power will gradually replace fossil fuels. As the proportion of renewable energy generation increases, the power balance model of the entire power system also needs to be restructured. In this new power system, energy storage will become a crucial component, serving as a necessary guarantee for renewable energy consumption and grid security. It will be widely applied on the generation, grid, and consumption sides, with vast potential demand.

[0003] In an era that advocates cost reduction and efficiency improvement, as well as energy conservation and cost reduction, cost reduction has become a key indicator for market access in construction projects and for enhancing corporate competitiveness. Therefore, it is particularly important to address the issues of lead-acid battery lifespan and low energy storage efficiency while ensuring stable power supply to the entire plant's control system. Utility Model Content

[0004] This disclosure provides a novel distributed energy storage self-contained power supply device to solve the technical problem of low energy storage utilization efficiency while ensuring the power stability of the entire plant control system.

[0005] This disclosure provides a novel distributed energy storage self-contained power supply device, including a photovoltaic power generation unit, an energy storage unit, a DC feeder unit, an emergency lighting unit, and an uninterruptible power supply unit. The first input terminal of the DC feeder unit is connected to the AC bus of the power distribution room, so that the AC bus of the power distribution room can distribute power to the DC feeder unit. The energy storage unit includes:

[0006] The first circuit has its input terminal connected to the output terminal of the photovoltaic power generation unit, and its output terminal connected to the second input terminal of the DC feeder unit, the input terminal of the emergency lighting unit, and the input terminal of the uninterruptible power supply unit, for distributing power to the DC feeder unit, the emergency lighting unit, and the uninterruptible power supply unit.

[0007] The second circuit has its input terminal connected to the AC busbar of the power distribution room, and its output terminal connected to the input terminal of the first circuit, the input terminal of the emergency lighting unit, and the input terminal of the uninterruptible power supply unit. It is used to charge the first circuit and to distribute power to the emergency lighting unit and the uninterruptible power supply unit.

[0008] In some embodiments, the first circuit includes:

[0009] The first circuit breaker, with its first terminal serving as the input terminal of the first circuit;

[0010] The battery pack has its charging terminal connected to the second terminal of the first circuit breaker, and its power distribution terminal serves as the output terminal of the first circuit.

[0011] In some embodiments, the second circuit includes:

[0012] The second circuit breaker, with its first terminal serving as the input terminal of the second circuit;

[0013] The energy storage converter has its AC side connected to the second terminal of the second circuit breaker, and its DC side serves as the output terminal of the second circuit.

[0014] In some embodiments, the DC feeder unit further includes a third circuit, wherein the input terminal of the third circuit serves as the first input terminal of the DC feeder unit, and the output terminal of the third circuit serves as the output terminal of the DC feeder unit. The third circuit includes:

[0015] The third circuit breaker, the first terminal of which serves as the input terminal of the third circuit;

[0016] A rectifier, the AC side of which is connected to the second terminal of the third circuit breaker;

[0017] The fourth circuit breaker has its first end connected to the DC side of the rectifier and its second end serving as the output terminal of the third circuit.

[0018] In some embodiments, the DC feeder unit includes a fourth circuit, the input terminal of which serves as the second input terminal of the DC feeder unit, and the output terminal of which is connected to the first terminal of the fourth circuit breaker; the third circuit includes:

[0019] At least one first sub-circuit, the input terminal of the first sub-circuit serves as the input terminal of the third circuit, the first sub-circuit includes a fifth circuit breaker and a first converter, the first terminal of the fifth circuit breaker serves as the input terminal of the first sub-circuit, the input terminal of the first converter is connected to the second terminal of the third circuit breaker, and the output terminal of the first converter serves as the output terminal of the first sub-circuit.

[0020] The step-down silicon chain has its input terminal connected to the output terminal of the first sub-circuit, and its output terminal serves as the output terminal of the third circuit.

[0021] In some embodiments, the photovoltaic power generation unit includes:

[0022] Photovoltaic modules

[0023] The seventh circuit breaker, the first end of which is connected to the output terminal of the photovoltaic module;

[0024] The second converter has its input end connected to the second end of the seventh circuit breaker, and its output end serves as the output end of the photovoltaic power generation unit.

[0025] In some embodiments, the emergency lighting unit includes:

[0026] The first inverter unit has its DC side serving as the input terminal of the emergency lighting unit;

[0027] The eighth circuit breaker has its first end connected to the AC side of the first inverter unit, and its second end serving as the output end of the emergency lighting unit.

[0028] In some embodiments, the uninterruptible power supply unit includes at least one second sub-circuit, wherein the input terminal of the second sub-circuit serves as the input terminal of the uninterruptible power supply unit, and the output terminal of the second sub-circuit serves as the output terminal of the uninterruptible power supply unit. The second sub-circuit includes:

[0029] The second inverter unit has its DC side serving as the input terminal of the second sub-circuit;

[0030] The ninth circuit breaker has its first end connected to the AC side of the second inverter unit, and its second end serving as the output terminal of the second sub-circuit.

[0031] In some embodiments, the battery pack includes a DC feeder unit battery cluster, an uninterruptible power supply unit battery cluster, an emergency lighting unit battery cluster, and an energy storage unit battery cluster.

[0032] In some embodiments, the novel distributed energy storage self-contained power supply device further includes:

[0033] A battery management unit, which is signal-connected to the energy storage unit;

[0034] An energy management unit is signal-connected to the energy storage unit, the photovoltaic power generation unit, the DC feeder unit, the uninterruptible power supply unit, and the emergency lighting unit.

[0035] This disclosure provides a novel distributed energy storage self-contained power supply device. Through a photovoltaic power generation unit, the first circuit of the energy storage unit can be charged. The DC feeder unit can be directly powered from the AC bus of the power distribution room via its first input terminal. Furthermore, the first circuit of the energy storage unit can power the DC feeder unit, the emergency lighting unit, and the uninterruptible power supply unit. The second circuit of the energy storage unit can charge the first circuit and power the emergency lighting unit and the uninterruptible power supply unit. Thus, while ensuring the stability of the power supply for the entire plant control system, it solves the technical problems of low lead-acid battery life and low energy storage utilization efficiency, achieving the beneficial effects of cost control, investment savings, and reduced manpower maintenance load. Attached Figure Description

[0036] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0037] Figure 1 A structural block diagram of a novel distributed energy storage self-contained power supply device provided in the embodiments of this disclosure;

[0038] Figure 2 A schematic diagram of the structure of a novel distributed energy storage self-contained power supply device provided in the embodiments of this disclosure;

[0039] Figure 3 This is a schematic diagram of the structure of a novel distributed energy storage self-contained power supply device provided for another embodiment of this disclosure.

[0040] The attached diagram is labeled as follows: Photovoltaic power generation unit 100, first circuit 210, second circuit 220, DC power supply unit 300, emergency lighting unit 400, uninterruptible power supply unit 500, first circuit breaker QF1, second circuit breaker QF2, third circuit breaker QF3, fourth circuit breaker QF4, fifth circuit breaker QF5 and QF6, seventh circuit breaker QF7, eighth circuit breaker QF8, ninth circuit breaker QF9 and QF10, energy storage converter PCS, rectifier A030, first converter B030 and B031, second converter B032, first inverter A040, second inverter units A041 and A042, battery management unit BMS, and energy management unit EMS. Detailed Implementation

[0041] To enable those skilled in the art to better understand the technical solutions of this disclosure, and to fully understand and implement the process of how this disclosure applies technical means to solve technical problems and achieve corresponding technical effects, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. The embodiments of this disclosure and the various features within them can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort should fall within the protection scope of this disclosure.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Under the global goal of carbon neutrality, clean energy will gradually replace fossil fuels, with wind and solar power becoming the absolute mainstays of clean energy, and their installed capacity continuing to grow rapidly. However, new energy power generation has issues of instability, randomness, and intermittency, placing higher demands on grid frequency control. As the proportion of new energy power generation increases, the power balance pattern of the entire power system also needs to be restructured. In the new power system, energy storage will become a crucial component, a necessary guarantee for the absorption of new energy and grid security, and will be widely used on the generation, grid, and consumption sides, with a vast demand potential.

[0044] In the early stages of the energy storage industry's development, the business model of energy storage power stations was unclear, and their economic viability was not obvious. Mandatory energy storage allocation for new energy projects became the main driving force for energy storage installations. However, mandatory energy storage allocation for new energy projects has certain limitations in terms of utilization efficiency, storage scale, cost mitigation, and business models. Currently, energy storage power stations in various application scenarios in my country are mainly invested and constructed by power generation companies, grid companies, and users. Existing generation-side energy storage, grid-side energy storage, and user-side energy storage typically serve only a single entity. However, this type of energy storage operation model generally suffers from problems in utilization efficiency and cost-effectiveness, hindering the commercial development and operation of energy storage. Energy storage utilization efficiency is low, and full charging and discharging once a day on average has not yet been achieved. Typical supporting energy storage projects often only serve a single renewable energy power station, with no direct connection between different energy storage power stations. The business model is simple and cannot achieve economical operation of energy storage.

[0045] Against the backdrop of advocating cost reduction and efficiency improvement, and energy conservation and cost reduction, cost reduction has become a key indicator for market access of construction projects and for enhancing corporate competitiveness.

[0046] This application addresses the working principles of Emergency Power Supply (EPS), Uninterruptible Power Supply (UPS), and DC power supply devices in oil refining and chemical enterprises, as well as the working principles of energy storage batteries, and proposes a novel distributed energy storage self-contained power supply device. On the one hand, it can meet the power stability requirements of the entire plant's control system, ensuring the safe operation of production equipment; on the other hand, it solves the problems of lead-acid battery life, power distribution room footprint, and low energy storage utilization efficiency, thereby controlling costs, saving investment, and reducing manpower maintenance load.

[0047] Example 1

[0048] Figure 1 This is a schematic diagram of the structure of a novel distributed energy storage self-contained power supply device provided in an embodiment of this disclosure. Figure 1 As shown, a novel distributed energy storage self-contained power supply device includes: a photovoltaic power generation unit 100, an energy storage unit 200, a DC feeder unit 300, an emergency lighting unit 400, and an uninterruptible power supply (UPS) unit 500. The first input terminal of the DC feeder unit 300 is connected to the AC bus of the power distribution room so that the AC bus of the power distribution room can distribute power to the DC feeder unit 300.

[0049] The energy storage unit 200 includes a first circuit 210 and a second circuit 220. The first circuit 210 has its input connected to the output of the photovoltaic power generation unit 100, and its output connected to the second input of the DC feeder unit 300, the input of the emergency lighting unit 400, and the input of the uninterruptible power supply unit 500, for distributing power to the DC feeder unit 300, the emergency lighting unit 400, and the uninterruptible power supply unit 500. The second circuit 220 has its input connected to the AC busbar of the power distribution room, and its output connected to the input of the first circuit 210, the input of the emergency lighting unit 400, and the input of the uninterruptible power supply unit 500, for charging the first circuit 210 and distributing power to the emergency lighting unit 400 and the uninterruptible power supply unit 500.

[0050] In some embodiments, such as Figure 2 As shown, the first circuit 210 includes a first circuit breaker QF1 and a battery pack. The first terminal of the first circuit breaker QF1 serves as the input terminal of the first circuit 210; the charging terminal of the battery pack is connected to the second terminal of the first circuit breaker QF1, and its power distribution terminal serves as the output terminal of the first circuit 210. The battery pack uses lithium-ion batteries.

[0051] In some embodiments, the battery pack includes DC feeder unit battery clusters, uninterruptible power supply unit battery clusters, emergency lighting unit battery clusters, and energy storage unit battery clusters. In this embodiment, the battery pack includes two DC feeder unit battery clusters, one uninterruptible power supply unit battery cluster, one emergency lighting unit battery cluster, and one energy storage unit battery cluster.

[0052] In some embodiments, such as Figure 2 As shown, the second circuit 220 includes a second circuit breaker QF2 and an energy storage converter PCS. The first terminal of the second circuit breaker QF2 serves as the input terminal of the second circuit 220; the AC side of the energy storage converter PCS is connected to the second terminal of the second circuit breaker QF2, and its DC side serves as the output terminal of the second circuit 220.

[0053] In some embodiments, such as Figure 2 As shown, the DC feeder unit 300 further includes a third circuit. The input terminal of the third circuit serves as the first input terminal of the DC feeder unit 300, and the output terminal of the third circuit serves as the output terminal of the DC feeder unit 300. The third circuit includes a third circuit breaker QF3, a rectifier A030, and a fourth circuit breaker QF4. The first terminal of the third circuit breaker QF3 serves as the input terminal of the third circuit; the AC side of the rectifier A030 is connected to the second terminal of the third circuit breaker QF3; the first terminal of the fourth circuit breaker QF4 is connected to the DC side of the rectifier A030, and the second terminal serves as the output terminal of the third circuit.

[0054] In some embodiments, such as Figure 2 As shown, the DC feeder unit 300 includes a fourth circuit, the input terminal of which serves as the second input terminal of the DC feeder unit 300, and the output terminal of which is connected to the first terminal of the fourth circuit breaker QF4. The third circuit includes a step-down silicon chain BSC and at least one first sub-circuit.

[0055] At least one first sub-circuit, the input terminal of the first sub-circuit serves as the input terminal of the third circuit, the first sub-circuit includes a fifth circuit breaker QF5 and a first converter B030, the first terminal of the fifth circuit breaker serves as the input terminal of the first sub-circuit, the input terminal of the first converter is connected to the second terminal of the third circuit breaker, and the output terminal of the first converter serves as the output terminal of the first sub-circuit. Figure 2 The diagram shows two first sub-circuit circuits: one includes the fifth circuit breaker QF5 and the first converter B030, and the other includes the fifth circuit breaker QF6 and the first converter B031. Figure 2 Although two first sub-circuits are shown in the figure, in other embodiments there may be one or more first sub-circuits.

[0056] The step-down silicon rectifier circuit (BSC) has its input terminal connected to the output terminal of the first sub-circuit, and its output terminal serving as the output terminal of the third circuit. The BSC is composed of multiple high-power silicon rectifier diodes connected in series, utilizing the forward voltage drop of the diodes to achieve voltage regulation.

[0057] In some embodiments, such as Figure 2 As shown, the photovoltaic power generation unit 100 includes photovoltaic modules, a seventh circuit breaker QF7, and a second converter B032. The first terminal of the seventh circuit breaker is connected to the output terminal of the photovoltaic modules; the input terminal of the second converter B032 is connected to the second terminal of the seventh circuit breaker QF7, and its output terminal serves as the output terminal of the photovoltaic power generation unit 100. Specifically, the photovoltaic modules are connected in series and parallel to a combiner box (combiner cabinet), and the combiner box (combiner cabinet) is connected to the second terminal of the seventh circuit breaker QF7 via cables. The photovoltaic power generation unit is mainly used for energy storage of the battery pack.

[0058] In some embodiments, such as Figure 2 As shown, the emergency lighting unit 400 includes a first inverter unit A040 and an eighth circuit breaker QF8. The DC side of the first inverter unit A040 serves as the input terminal of the emergency lighting unit 400; the first terminal of the eighth circuit breaker QF8 is connected to the AC side of the first inverter unit A040, and the second terminal serves as the output terminal of the emergency lighting unit 400.

[0059] In some embodiments, such as Figure 2 As shown, the uninterruptible power supply unit 500 includes at least one second sub-circuit. The input terminal of the second sub-circuit serves as the input terminal of the uninterruptible power supply unit, and the output terminal of the second sub-circuit serves as the output terminal of the uninterruptible power supply unit. The second sub-circuit includes a second inverter unit A041 and a ninth circuit breaker QF9. The DC side of the second inverter unit A041 serves as the input terminal of the second sub-circuit; the first terminal of the ninth circuit breaker QF9 is connected to the AC side of the second inverter unit A041, and the second terminal serves as the output terminal of the second sub-circuit. Figure 2 The image shows two second sub-circuits. One second sub-circuit includes the second inverter unit A041 and the ninth circuit breaker QF9, and the other second sub-circuit includes the second inverter unit A042 and the ninth circuit breaker QF10. Figure 2 Although two second sub-circuits are shown in the figure, in other embodiments there may be one or more second sub-circuits.

[0060] In a specific application, the novel distributed energy storage self-contained power supply device provided in this embodiment is as follows:

[0061] The battery pack is preferentially charged through the photovoltaic power generation unit 100. At this time, the seventh circuit breaker QF7 is closed and the second circuit breaker QF2 is opened. When the power supply of the photovoltaic power generation unit 100 fluctuates or is unstable, the seventh circuit breaker QF7 is opened and the second circuit breaker QF2 is closed, so that the power supply of the power distribution room can charge the battery pack through the AC bus and the energy storage converter PCS.

[0062] The DC feeder unit 300 is preferentially powered by the power supply of the power distribution room through its first input terminal. When the power supply of the power distribution room fails or the rectifier A030 fails, the fifth circuit breaker QF5 or QF6 is closed so that the battery pack can power the DC feeder unit 300 through the second input terminal of the DC feeder unit 300.

[0063] The emergency lighting unit 400 is powered primarily by the power distribution room. In the event of a power failure in the power distribution room or a failure of the energy storage converter PCS, it is powered by the battery pack.

[0064] The uninterruptible power supply unit 500 is preferentially powered by the power distribution room. When the power distribution room fails or the energy storage converter PCS fails, it is powered by the battery pack.

[0065] Therefore, the novel distributed energy storage self-contained power supply device provided in this embodiment can meet the power stability requirements of the entire plant control system and ensure the safe operation of production equipment. On the other hand, it can solve the problems of low energy storage utilization efficiency, lead-acid battery life, and power distribution room footprint, thereby controlling costs, saving investment, and reducing manpower maintenance load.

[0066] Example 2

[0067] like Figure 3 As shown, based on the above embodiments, the novel distributed energy storage self-contained power supply device further includes a battery management unit (BMS) and an energy management unit (EMS). The BMS is connected to the energy storage unit via signal 200. The EMS is connected to the energy storage unit 200, the photovoltaic power generation unit 100, the DC feeder unit 300, the uninterruptible power supply unit 500, and the emergency lighting unit via signal 400.

[0068] Specifically, the Battery Management Unit (BMS) includes a first Battery Management Unit (BMS) and a second Battery Management Unit (BMS). The first BMS is signal-connected to the DC feeder unit battery cluster and is used to control the charging and discharging of the DC feeder unit battery cluster. The second BMS is signal-connected to the uninterruptible power supply (UPS) unit battery cluster, the emergency lighting unit battery cluster, and the energy storage unit battery cluster and is used to control the charging and discharging of these battery clusters.

[0069] The energy management unit (EMS) is connected to the circuit breakers QF1, QF2 and the energy storage converter PCS in the energy storage unit 200, the circuit breakers QF3, QF4, QF5 and QF6 in the DC feeder unit 300, the circuit breaker QF7 in the photovoltaic power generation unit 100, the circuit breaker QF8 in the emergency lighting unit, and the circuit breakers QF9 and QF10 in the uninterruptible power supply unit.

[0070] When the Energy Management Unit (EMS) detects stable power supply to the photovoltaic power generation unit 100, it issues a control command to disconnect the second circuit breaker QF2 and close the seventh circuit breaker QF7, allowing the power supply to the photovoltaic power generation unit 100 to be balanced and charged through the battery management unit (BMS) controlling the battery pack. When the EMS detects fluctuations or instability in the power supply to the photovoltaic power generation unit 100, it issues a control command to disconnect the seventh circuit breaker QF7 and close the second circuit breaker QF2, allowing the power from the distribution room to be balanced and charged through the AC bus, via the energy storage converter (PCS), and under the control of the battery management unit (BMS) to the battery pack (excluding the energy storage unit battery clusters). After the energy storage unit battery clusters are fully charged, the EMS issues control commands to the energy storage converter (PCS) and the battery management unit (BMS) to allow the energy storage unit battery clusters to release electricity from 20:00 at night to 8:00 the next day for partial load use by the entire plant.

[0071] The DC feeder unit 300 is preferentially powered by the 380V power supply from the distribution room. When the energy management unit (EMS) detects a 380V power supply failure in the distribution room or a rectifier A030 failure, the EMS issues a control command to disconnect the third circuit breaker QF3 and also issues a control command to the first battery management unit (BMS). The BMS controls the equalization discharge of one group of DC feeder battery clusters. The DC feeder unit 300 is powered by the DC feeder battery clusters via the first converter B030 or B031. When the EMS detects a failure in the first converter B030 or a tripping of the fifth circuit breaker QF5, it issues a control command to close the fifth circuit breaker QF6.

[0072] The uninterruptible power supply (UPS) unit 500 is preferentially powered by the 38V power supply from the power distribution room through the energy storage converter PCS and the second inverter unit A041 or A042. When the energy management unit (EMS) detects a 380V power supply failure in the power distribution room or a failure in the energy storage converter PCS, the EMS issues a control command to disconnect the second circuit breaker QF2 and close the ninth circuit breaker QF9 or QF10, and also issues a control command to the second battery management unit (BMS). The BMS controls the equal discharge of one group of UPS battery clusters, and the UPS unit 500 is powered by the UPS battery clusters through the second inverter unit A041 or A042.

[0073] The emergency lighting unit 400 is preferentially powered by the 38V power supply from the power distribution room through the energy storage converter PCS and the first inverter A040. When the energy management unit EMS detects a 380V power supply failure in the power distribution room or a failure of the energy storage converter PCS, the energy management unit EMS issues a control command to disconnect the second circuit breaker QF2 and close the eighth circuit breaker QF8, and also issues a control command to the second battery management unit BMS. The second battery management unit BMS controls the equal discharge of one group of emergency lighting unit battery clusters, and the emergency lighting unit 400 is powered by the emergency lighting unit battery clusters through the first inverter A040.

[0074] Therefore, the novel distributed energy storage self-contained power supply device provided in this embodiment can, on the one hand, meet the power stability requirements of the entire plant control system and ensure the safe operation of production equipment; on the other hand, it can solve the problems of low energy storage utilization efficiency, lead-acid battery life, and power distribution room footprint, thereby controlling costs, saving investment, and reducing manpower maintenance load.

[0075] While the embodiments disclosed herein are as described above, the foregoing content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope of this disclosure; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A novel distributed energy storage self-provided power supply device, characterized by, The system includes a photovoltaic power generation unit, an energy storage unit, a DC feeder unit, an emergency lighting unit, and an uninterruptible power supply (UPS) unit. The first input terminal of the DC feeder unit is connected to the AC busbar of the power distribution room, enabling the AC busbar of the power distribution room to distribute power to the DC feeder unit. The energy storage unit includes: The first circuit has its input terminal connected to the output terminal of the photovoltaic power generation unit, and its output terminal connected to the second input terminal of the DC feeder unit, the input terminal of the emergency lighting unit, and the input terminal of the uninterruptible power supply unit, for distributing power to the DC feeder unit, the emergency lighting unit, and the uninterruptible power supply unit. The second circuit has its input terminal connected to the AC busbar of the power distribution room, and its output terminal connected to the input terminal of the first circuit, the input terminal of the emergency lighting unit, and the input terminal of the uninterruptible power supply unit. It is used to charge the first circuit and to distribute power to the emergency lighting unit and the uninterruptible power supply unit.

2. The novel distributed energy storage self-provided power supply device according to claim 1, characterized in that, The first circuit includes: The first circuit breaker, with its first terminal serving as the input terminal of the first circuit; The battery pack has its charging terminal connected to the second terminal of the first circuit breaker, and its power distribution terminal serves as the output terminal of the first circuit.

3. The novel distributed energy storage self-provisioned power supply device according to claim 1, characterized in that, The second circuit includes: The second circuit breaker, with its first terminal serving as the input terminal of the second circuit; The energy storage converter has its AC side connected to the second terminal of the second circuit breaker, and its DC side serves as the output terminal of the second circuit.

4. The novel distributed energy storage self-provisioned power supply device according to claim 1, characterized in that, The DC feeder unit further includes a third circuit, the input terminal of which serves as the first input terminal of the DC feeder unit, and the output terminal of which serves as the output terminal of the DC feeder unit. The third circuit includes: The third circuit breaker, the first terminal of which serves as the input terminal of the third circuit; A rectifier, the AC side of which is connected to the second terminal of the third circuit breaker; The fourth circuit breaker has its first end connected to the DC side of the rectifier and its second end serving as the output terminal of the third circuit.

5. The novel distributed energy storage self-provisioned power supply device according to claim 4, characterized in that, The DC feeder unit includes a fourth circuit, the input terminal of which serves as the second input terminal of the DC feeder unit, and the output terminal of which is connected to the first terminal of the fourth circuit breaker; the third circuit includes: At least one first sub-circuit, the input terminal of the first sub-circuit serves as the input terminal of the third circuit, the first sub-circuit includes a fifth circuit breaker and a first converter, the first terminal of the fifth circuit breaker serves as the input terminal of the first sub-circuit, the input terminal of the first converter is connected to the second terminal of the third circuit breaker, and the output terminal of the first converter serves as the output terminal of the first sub-circuit. The step-down silicon chain has its input terminal connected to the output terminal of the first sub-circuit, and its output terminal serves as the output terminal of the third circuit.

6. The novel distributed energy storage self-provisioned power supply device according to claim 1, characterized in that, The photovoltaic power generation unit includes: Photovoltaic modules The seventh circuit breaker, the first end of which is connected to the output terminal of the photovoltaic module; The second converter has its input end connected to the second end of the seventh circuit breaker, and its output end serves as the output end of the photovoltaic power generation unit.

7. The novel distributed energy storage self-provisioned power supply device according to claim 1, characterized by, The emergency lighting unit includes: The first inverter unit has its DC side serving as the input terminal of the emergency lighting unit; The eighth breaker, whose first end is connected with the AC side of the first inverter unit, and whose second end is as the output end of the emergency lighting unit.

8. The novel distributed energy storage self-provisioned power supply device according to claim 1, characterized by, The uninterruptible power supply unit comprises at least one second sub-circuit, the input end of the second sub-circuit is as the input end of the uninterruptible power supply unit, the output end of the second sub-circuit is as the output end of the uninterruptible power supply unit, and the second sub-circuit comprises: The second inverter unit, whose DC side is as the input end of the second sub-circuit; The ninth breaker, whose first end is connected with the AC side of the second inverter unit, and whose second end is as the output end of the second sub-circuit.

9. The novel distributed energy storage self-provisioned power supply device according to claim 2, characterized by, The battery pack comprises a DC feeder unit battery cluster, an uninterruptible power supply unit battery cluster, an emergency lighting unit battery cluster and an energy storage unit battery cluster.

10. The novel distributed energy storage self-provisioned power supply device according to any one of claims 1 to 9, characterized in that, Further comprising: A battery management unit, which is in signal connection with the energy storage unit; An energy source management unit, which is in signal connection with the energy storage unit, the photovoltaic power generation unit, the DC feeder unit, the uninterruptible power supply unit and the emergency lighting unit.

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