Power supply system

Abstract

The utility model provides a power supply system which comprises a mains supply, a first line and a second line, the mains supply can be connected with a load through the first line or the second line, the sides, close to the load, of the first line and the second line are each provided with a frame circuit breaker, and the second line is provided with a storage battery device. The storage battery device supplies power to the load when the mains supply does not supply power, each frame circuit breaker comprises a switch and a comprehensive protection device, and the comprehensive protection device is used for detecting the synchronism of the switch and controlling the switch to be switched on when the synchronism occurs; when the second line is switched to the first line for power supply, the comprehensive protection device on the first line is used for detecting the synchronism of the two ends of the switch on the first line and controlling the corresponding switch to be switched on during the synchronism, and after the switch on the first line is switched on, the comprehensive protection device on the second line is switched off. And the comprehensive protection device on the second line controls the corresponding switch to be switched off, so that load transfer without power failure can be realized.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor equipment technology, and in particular to a power supply system. Background Technology

[0002] In the production of many high-tech products (such as semiconductor devices), the stability and continuity of power supply are typically critical, along with significant capacity requirements. Current power supply systems often employ flywheels paired with diesel generators or SUPS (supplied uninterrupted power supply) paired with diesel generators to achieve stable and uninterrupted power supply over extended periods. However, in SUPS-diesel generator configurations, the small capacity of a single SUPS unit results in a short power supply time. For example, if upstream power equipment requires prolonged maintenance or spare parts are unavailable, after the SUPS discharges, the electrical parameters (such as voltage and angle) of other power sources (e.g., mains power or flywheel-diesel generator) may not be entirely consistent with the SUPS's output, making it impossible to transfer the load without interruption of power. This necessitates shutting down the SUPS and interrupting the power supply. Furthermore, current SUPS systems are only suitable for short-distance power supply, thus requiring installation near the production facility and consuming considerable space. Utility Model Content

[0003] One of the objectives of this invention is to provide a power supply system that can achieve uninterrupted load transfer when the SUPS finishes discharging.

[0004] Another objective of this invention is to enable long-distance power supply.

[0005] To solve the above problems, this utility model provides a power supply system, including mains power, a first line and a second line. The mains power can be connected to a load through the first line or the second line. A frame circuit breaker is installed on both the first line and the second line near the load side. A battery storage device is installed on the second line. The battery storage device supplies power to the load when the mains power is not available. Each frame circuit breaker includes a switch and a comprehensive protection device. The comprehensive protection device is used to detect the synchronization of the switch and control the switch to close when synchronized.

[0006] When the power supply from the second line to the first line is switched, the integrated protection device on the first line is used to detect synchronization at both ends of the switch on the first line, and control the corresponding switch to close when synchronization occurs. After the switch on the first line is closed, the integrated protection device on the second line controls the corresponding switch to open.

[0007] Optionally, the mains power includes a first mains power and a second mains power. One end of the first line is connected to the first mains power, one end of the second line is connected to the second mains power, and the other ends of the first line and the other ends of the second line are connected and simultaneously connected to the load.

[0008] A mains power supply switch is provided between the first mains power supply and the second mains power supply. When the first mains power supply or the second mains power supply is unable to supply power, the mains power supply switch is closed; when both the first mains power supply and the second mains power supply are able to supply power, the mains power supply switch is open.

[0009] Optionally, the first line is equipped with a first frame circuit breaker and a second frame circuit breaker. One end of the first frame circuit breaker is connected to the first mains power, and the other end is connected to one end of the second frame circuit breaker. The other end of the second frame circuit breaker is connected to the other end of the second line and the load.

[0010] Optionally, the second line is provided with an upstream power supply component, an energy storage component, and a booster component. One end of the upstream power supply component is connected to the second mains power, the other end of the upstream power supply component is connected to one end of the energy storage component, the other end of the energy storage component is connected to one end of the booster component, and the other end of the booster component is connected to the other end of the second frame circuit breaker and the load.

[0011] Furthermore, the energy storage component includes multiple parallel-connected energy storage unit groups. Each energy storage unit group includes a battery device, a first protection switch, and a second protection switch. One end of all the first protection switches is connected in parallel and simultaneously connected to the other end of the upstream power supply component. In each energy storage unit group, the other end of each first protection switch is connected to one end of the battery device, and the other end of the battery device is connected to one end of the second protection switch. The other ends of all the second protection switches are connected in parallel and simultaneously connected to one end of the boost component.

[0012] Furthermore, the boost assembly includes a second voltage conversion device, a third frame circuit breaker, a fourth frame circuit breaker, and a fifth frame circuit breaker. One end of the third frame circuit breaker is connected to the other end of all the second protective switches, and the other end of the third frame circuit breaker is also connected to one end of the second voltage conversion device. The other end of the second voltage conversion device is connected to one end of the fourth frame circuit breaker, and the other end of the fourth frame circuit breaker is connected to one end of the fifth frame circuit breaker. The other end of the fifth frame circuit breaker is also connected to the other end of the second frame circuit breaker and the load.

[0013] Furthermore, the second voltage conversion device includes a step-up transformer and an inverter. One end of the inverter is connected to the other end of the third frame circuit breaker, the other end of the inverter is connected to one end of the step-up transformer, and the other end of the step-up transformer is connected to one end of the fourth frame circuit breaker.

[0014] Furthermore, the power supply system also includes two load-side components. Each load-side component includes a first load switch, a second load switch, and a step-down transformer. In each load-side component, one end of the first load switch is connected to the other end of the second frame circuit breaker, the other end of the first load switch is connected to one end of the step-down transformer, the other end of the step-down transformer is connected to one end of the second load switch, and the other end of the second load switch is connected to one input terminal of the load.

[0015] Furthermore, the first frame circuit breaker and the second frame circuit breaker in the first line, the third frame circuit breaker, the fourth frame circuit breaker and the fifth frame circuit breaker in the second line, and the first load switch and the second load switch in the load-side assembly are all VCB vacuum circuit breakers.

[0016] The VCB vacuum circuit breakers all include a switch and an integrated protection device. The integrated protection device includes a parameter setting unit, a control unit, and a testing unit. The parameter setting unit is configured with synchronization setting parameters and a closing output command. The testing unit detects the electrical parameters on both sides of the switch. The control unit compares the electrical parameters with the synchronization setting parameters to obtain the synchronization result and controls the switch to close when synchronization is achieved.

[0017] Furthermore, the synchronization setting parameters include the frequency difference, voltage difference, phase difference, and tripping delay at both ends of the switch.

[0018] Compared with existing technologies, it has the following beneficial effects:

[0019] This utility model provides a power supply system, including mains power, a first line, and a second line. The mains power can connect to a load through the first line or the second line. A frame circuit breaker is installed near the load side of both the first and second lines. A battery device is installed on the second line, which supplies power to the load when the mains power is not available. Each frame circuit breaker includes a switch and a comprehensive protection device. The comprehensive protection device is used to detect synchronization of the switch and control the switch to close when synchronization occurs. When switching power from the second line to the first line, the comprehensive protection device on the first line is used to detect synchronization at both ends of the switch on the first line and control the corresponding switch to close when synchronization occurs. After the switch on the first line closes, the comprehensive protection device on the second line controls the corresponding switch to open, thus achieving uninterrupted load transfer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a power supply system according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 11-First mains power supply; 12-Second mains power supply; 13-Mains power supply switch; 21-First frame circuit breaker; 22-Second frame circuit breaker; 30-Upstream power supply component; 31-First switch; 32-Second switch; 33-First voltage conversion device; 34-Incoming line switch; 40-Energy storage component; 41-First protection switch; 42-Battery unit; 43-Second protection switch; 50-Step-up component; 51-Third frame circuit breaker; 52-Second voltage conversion device; 53-Fourth frame circuit breaker; 54-Fifth frame circuit breaker; 60-Load end component; 61-First load switch; 62-Step-down transformer; 63-Second load switch; 70-Load. Detailed Implementation

[0023] The following will provide a further detailed description of a power supply system according to the present invention. The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0024] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not detailed in detail, as they would confuse the present invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific goals, such as changes from one embodiment to another according to limitations related to the system or business. Furthermore, it should be understood that such development work may be complex and time-consuming, but is merely routine work for those skilled in the art.

[0025] To make the objectives and features of this utility model clearer and easier to understand, the specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model.

[0026] like Figure 1 As shown, this embodiment provides a power supply system including mains power, a first line, and a second line. The mains power can be connected to a load 70 through the first line or the second line. A frame circuit breaker is provided on the side of the first line and the second line near the load 70. A battery storage device 42 is provided on the second line. The battery storage device 42 supplies power to the load 70 when the mains power is not available. Each frame circuit breaker includes a switch and a comprehensive protection device. The comprehensive protection device is used to detect the synchronization of the switch and control the switch to close when synchronized.

[0027] When the power supply from the second line to the first line is switched, the integrated protection device on the first line is used to detect synchronization at both ends of the switch on the first line, and control the corresponding switch to close when synchronization occurs. After the switch on the first line is closed, the integrated protection device on the second line controls the corresponding switch to open.

[0028] In this embodiment, frame circuit breakers are installed on both the first and second lines near the load 70. When the second line switches power to the first line, the integrated protection device on the first line is used to detect synchronization at both ends of the switch on the first line and control the corresponding switch to close when synchronized. After the switch on the first line is closed, the integrated protection device on the second line controls the corresponding switch to open, thus achieving uninterrupted transfer of the load 70.

[0029] Specifically, the mains power includes a first mains power supply 11 and a second mains power supply 12. The first mains power supply 11 and the second mains power supply 12 are two independent AC power sources. At the same time, the first mains power supply 11 and / or the second mains power supply 12 can provide high-voltage AC power, such as 20KV AC power. In this embodiment, the first mains power supply 11 serves as a backup power source, and the second mains power supply 12 serves as the main power source.

[0030] A mains power supply switch 13 is provided between the first mains power supply 11 and the second mains power supply 12. When either the first mains power supply 11 or the second mains power supply 12 is unavailable, the mains power supply switch 13 closes, allowing uninterrupted power supply to either the first or second line. When both the first and second mains power supplies are available, the mains power supply switch 13 opens, and one end of the first line is connected to the first mains power supply 11, one end of the second line is connected to the second mains power supply 12, and the other ends of the first and second lines are connected together, and simultaneously connected to the load 70.

[0031] Two frame circuit breakers are installed on the first line, namely a first frame circuit breaker 21 and a second frame circuit breaker 22. The first frame circuit breaker 21 is located close to the first mains power 11, with one end connected to the first mains power 11 and the other end connected to one end of the second frame circuit breaker 22, so as to control the first mains power 11 to enter the first line. The second frame circuit breaker 22 is located close to the load 70, with the other end connected to the other end of the second line and the load 70, so as to control the first mains power 11 to flow out of the first line.

[0032] The second line is equipped with an upstream power supply component 30, an energy storage component 40, and a boost component 50. One end of the upstream power supply component 30 is connected to the second mains power 12, and the other end of the upstream power supply component 30 is connected to one end of the energy storage component 40. The other end of the energy storage component 40 is connected to one end of the boost component 50, and the other end of the boost component 50 is connected to the other end of the second frame circuit breaker 22 of the first line and the load 70.

[0033] The upstream power supply component 30 includes a first switch 31, a second switch 32, a first voltage conversion device 33, and an incoming line switch 34. One end of the first switch 31 is connected to the second mains power 12, the other end of the first switch 31 is connected to one end of the second switch 32, the other end of the second switch 32 is connected to one end of the first voltage conversion device 33, the other end of the first voltage conversion device 33 is connected to one end of the incoming line switch 34, and the other end of the incoming line switch 34 is connected to the energy storage component 40.

[0034] Both the first switch 31 and the second switch 32 are VCB vacuum circuit breakers. The first voltage conversion device 33 includes an upstream step-down transformer 62 and an inverter. One end of the upstream step-down transformer 62 is connected to the other end of the second switch 32, and the other end of the upstream step-down transformer 62 is connected to one end of the inverter. The other end of the inverter is connected to one end of the incoming line switch 34, so that the first voltage conversion device 33 converts the high-voltage AC power of the first mains power 11 or the second mains power 12 into a low-voltage DC power usable by the energy storage component 40, for example, 0.48KV DC.

[0035] The energy storage component 40 includes multiple energy storage unit groups connected in parallel. Each energy storage unit group includes a battery device 42, a first protection switch 41, and a second protection switch 43. One end of all the first protection switches 41 are connected in parallel and simultaneously connected to the other end of the incoming line switch 34. In each energy storage unit group, the other end of each first protection switch 41 is connected to one end of the battery device 42, and the other end of the battery device 42 is connected to one end of the second protection switch 43. The other ends of all the second protection switches 43 are connected in parallel and simultaneously connected to one end of the boost component 50.

[0036] The battery device 42 is equipped with an energy storage component and an overcurrent protection component. The overcurrent protection component is a VCB vacuum circuit breaker, which can synchronize its two ends and control the energy storage component to conduct with the first protection switch 41 and the second protection switch 43 on both sides, serving as an internal overcurrent fast-break protection structure for the battery device 42.

[0037] The first line is also equipped with a maintenance switch, one end of which is connected to one end of the first protection switch 41, and the other end of which is connected to the booster assembly 50.

[0038] The boost converter 50 includes a second voltage conversion device 52, a third frame circuit breaker 51, a fourth frame circuit breaker 53, and a fifth frame circuit breaker 54. One end of the third frame circuit breaker 51 is connected to the other end of all the second protective switches 43, and the other end of the third frame circuit breaker 51 is simultaneously connected to one end of the second voltage conversion device 52 and the other end of the maintenance switch. The other end of the second voltage conversion device 52 is connected to one end of the fourth frame circuit breaker 53, and the other end of the fourth frame circuit breaker 53 is connected to one end of the fifth frame circuit breaker 54. The other end of the fifth frame circuit breaker 54 is simultaneously connected to the other end of the second frame circuit breaker 22 and the load 70.

[0039] The second voltage conversion device 52 includes a step-up transformer and an inverter. One end of the inverter is connected to the other end of the third frame circuit breaker 51, the other end of the inverter is connected to one end of the step-up transformer, and the other end of the step-up transformer is connected to one end of the fourth frame circuit breaker 53.

[0040] The power supply system also includes a load-side high-voltage busbar, which connects to the other end of the first line and the other end of the second line, and is also connected to the load 70. The voltage on the high-voltage busbar is the same as the voltage provided by the first mains power 11 and the second mains power 12, and both are AC high voltage, such as 20KV AC.

[0041] The power supply system also includes two load-end components 60, one end of each load-end component 60 is connected to the load-end high-voltage bus, and the other end of each load-end component 60 is connected to an input terminal of the load 70.

[0042] Each load-side assembly 60 includes a first load switch 61, a second load switch 63, and a step-down transformer 62. In each load-side assembly 60, one end of the first load switch 61 is connected to the high-voltage bus, the other end of the first load switch 61 is connected to one end of the step-down transformer 62, the other end of the step-down transformer 62 is connected to one end of the second load switch 63, and the other end of the second load switch 63 is connected to the input terminal of the load 70.

[0043] In this embodiment, the parallel energy storage unit groups are paired with step-up transformers and step-down transformers 62, which allows the battery device 42 to be set up at a remote distance and to supply power to the load 70 at a remote distance. At the same time, all energy storage unit groups are connected to the step-up component 50 after being connected in parallel, which can reduce the number of output circuits of the energy storage unit groups.

[0044] Among them, the first frame circuit breaker 21, the second frame circuit breaker 22, the third frame circuit breaker 51, the fourth frame circuit breaker 53, the fifth frame circuit breaker 54, the first load switch 61, and the second load switch 63 are all VCB vacuum circuit breakers.

[0045] The VCB vacuum circuit breakers all include a switch and an integrated protection device. The integrated protection device includes a parameter setting unit, a control unit, and a testing unit. The parameter setting unit is configured with synchronization setting parameters, closing output commands, opening setting conditions, and opening output commands. The testing unit tests the electrical parameters on both sides of the switch, such as frequency difference, voltage difference, phase difference, and tripping delay. The control unit compares the test parameters with the parameter settings in the parameter setting unit to achieve synchronization control of the switch on both sides, closing the switch, and controlling the switch to open when the opening setting conditions are met.

[0046] During synchronization, the electrical parameters detected by each of the integrated protection devices must be within a preset range, such as a frequency difference within 0.2Hz, a voltage difference within 0.04Un, and a trip delay of 0 seconds, where 1Un is the voltage value provided by the first mains power 11 or the second mains power 12.

[0047] The integrated protection device controls the switch to open when the following conditions are met: the switch is in the working position, the switch is in the closed position, the voltage across the switch is normal, and the current flowing through the switch is greater than the no-load current.

[0048] The application of the power supply system provided in this embodiment is as follows:

[0049] When no fault occurs on the second line, at least one of the first frame circuit breaker 21 and the second frame circuit breaker 22 is tripped. The first switch 31, the second switch 32, the incoming switch 34, the first protection switch 41, the second protection switch 43, the third frame circuit breaker 51, the fourth frame circuit breaker 53, and the fifth frame circuit breaker 54 on the second line are all closed. Simultaneously, the first load switch 61 and the second load switch 63 are both closed. At this time, the first mains power 11 or the second mains power 12 is stepped down and converted from AC to DC through the upstream power supply component 30 of the second line, and a low-voltage DC is input to the energy storage component 40. The energy storage component 40 can perform voltage stabilization and energy storage functions, and the low-voltage DC is stepped up by the step-up component 50 and converted from DC to AC. Then, the target voltage signal is input to the input terminal of the load 70 through the step-down transformer 62 in the load-side component 60.

[0050] When a fault occurs in the upstream power supply component 30 of the second line, at least one of the first frame circuit breaker 21 and the second frame circuit breaker 22 will trip within a preset time. Simultaneously, the first protection switch 41, the second protection switch 43, the third frame circuit breaker 51, the fourth frame circuit breaker 53, and the fifth frame circuit breaker 54 on the second line will all close. At the same time, the first load switch 61 and the second load switch 63 will also close. At this time, the energy storage component 40 will supply the low-voltage DC stored in the battery device 42 to the boost component 50. The low-voltage DC will be boosted by the boost component 50 and converted to AC. Then, the target voltage signal will be input to the input terminal of the load 70 via the step-down transformer 62 in the load-side component 60.

[0051] When the preset time has elapsed and the power supply line needs to be transferred from the second line to the first line, firstly, the first frame circuit breaker 21, the first protective switch 41, the second protective switch 43, the third frame circuit breaker 51, the fourth frame circuit breaker 53, and the fifth frame circuit breaker 54 all close. Simultaneously, the first load switch 61 and the second load switch 63 both close. At this time, the second frame circuit breaker 22 opens, and the second frame circuit breaker 22 and the fifth frame circuit breaker 54 synchronize, that is, they respectively detect the electrical parameters at their two ends, and control the second frame circuit breaker 22 to close after synchronizing. Then, when it is determined that the fifth frame circuit breaker 54 meets the opening conditions, that is, the second frame circuit breaker 22 is closed, the second frame circuit breaker 22 is in the working position, the second frame circuit breaker 22 is in the closed position, the voltage at both ends of the second frame circuit breaker 22 is normal, and the current flowing through the second frame circuit breaker 22 is greater than the no-load current, the fifth frame circuit breaker 54 opens, thereby realizing the uninterrupted transfer of load.

[0052] After the upstream power supply component 30 of the second line is repaired, firstly, the second frame circuit breaker 22 and the fifth frame circuit breaker 54 are synchronized, and the fifth frame circuit breaker 54 is closed after the synchronization is checked; then, when the second frame circuit breaker 22 meets the opening conditions, that is, when the fifth frame circuit breaker 54 is closed, the fifth frame circuit breaker 54 is in the working position, the fifth frame circuit breaker 54 is in the closed position, the voltage across the fifth frame circuit breaker 54 is normal, and the current flowing through the fifth frame circuit breaker 54 is greater than the no-load current, the second frame circuit breaker 22 opens, thereby realizing the uninterrupted transfer of load 70.

[0053] In this embodiment, the step-up component 50 and the step-down transformer 62 enable long-distance power supply to the battery device 42. When the second frame circuit breaker 22 on the first line and the fifth frame circuit breaker 54 on the second line are closed simultaneously, each of the overcurrent protection component, the third frame circuit breaker 51, the fourth frame circuit breaker 53 and the fifth frame circuit breaker 54, the first frame circuit breaker 21 and the second frame circuit breaker 22 serves as an overcurrent fast-break protection structure in the circuit from the first mains power 11 or the second mains power 12 through the first line to the energy storage component in the second line. If any abnormality is detected when each VCB vacuum circuit breaker detects electrical parameters, it can actively trip to protect the battery device 42 when the second frame circuit breaker 22 and the fifth frame circuit breaker 54 are closed simultaneously. The step-up transformer also plays a buffering role in this process.

[0054] In summary, this utility model provides a power supply system including mains power, a first line, and a second line. The mains power can connect to a load through the first line or the second line. A frame circuit breaker is installed near the load side on both the first and second lines. A battery storage device is installed on the second line, supplying power to the load when the mains power is unavailable. Each frame circuit breaker includes a switch and a comprehensive protection device. The comprehensive protection device is used to synchronize the switch and control the switch to close when synchronized. When switching power from the second line to the first line, the comprehensive protection device on the first line synchronizes the two ends of the switch on the first line and controls the corresponding switch to close when synchronized. After the switch on the first line closes, the comprehensive protection device on the second line controls the corresponding switch to open, enabling uninterrupted load transfer.

[0055] Furthermore, it should be noted that, unless otherwise specified or indicated, the terms "first" and "second" in the specification are used only to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical or sequential relationships between the various components, elements, steps, etc.

[0056] It is understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A power supply system, characterized in that, It includes mains power, a first line and a second line. The mains power can connect to the load through the first line or the second line. A frame circuit breaker is installed near the load side of both the first line and the second line. A battery device is installed on the second line. The battery device supplies power to the load when the mains power is not available. Each frame circuit breaker includes a switch and a comprehensive protection device. The comprehensive protection device is used to detect the synchronization of the switch and control the switch to close when synchronized. When the power supply from the second line to the first line is switched, the integrated protection device on the first line is used to detect synchronization at both ends of the switch on the first line, and control the corresponding switch to close when synchronization occurs. After the switch on the first line is closed, the integrated protection device on the second line controls the corresponding switch to open.

2. The power supply system as described in claim 1, characterized in that, The mains power includes a first mains power and a second mains power. One end of the first line is connected to the first mains power, one end of the second line is connected to the second mains power, and the other ends of the first line and the other ends of the second line are connected and simultaneously connected to the load. A mains power supply switch is provided between the first mains power supply and the second mains power supply. When the first mains power supply or the second mains power supply is unable to supply power, the mains power supply switch is closed; when both the first mains power supply and the second mains power supply are able to supply power, the mains power supply switch is open.

3. The power supply system as described in claim 1, characterized in that, The first line is equipped with a first frame circuit breaker and a second frame circuit breaker. One end of the first frame circuit breaker is connected to the first mains power, and the other end is connected to one end of the second frame circuit breaker. The other end of the second frame circuit breaker is connected to the other end of the second line and the load.

4. The power supply system as described in claim 1, characterized in that, The second line is equipped with an upstream power supply component, an energy storage component, and a booster component. One end of the upstream power supply component is connected to the second mains power, and the other end of the upstream power supply component is connected to one end of the energy storage component. The other end of the energy storage component is connected to one end of the booster component, and the other end of the booster component is connected to the other end of the second frame circuit breaker and the load.

5. The power supply system as described in claim 4, characterized in that, The energy storage component includes multiple parallel-connected energy storage unit groups. Each energy storage unit group includes a battery device, a first protection switch, and a second protection switch. One end of all the first protection switches is connected in parallel and simultaneously connected to the other end of the upstream power supply component. In each energy storage unit group, the other end of each first protection switch is connected to one end of the battery device, and the other end of the battery device is connected to one end of the second protection switch. The other ends of all the second protection switches are connected in parallel and simultaneously connected to one end of the boost component.

6. The power supply system as described in claim 5, characterized in that, The boost converter assembly includes a second voltage conversion device, a third frame circuit breaker, a fourth frame circuit breaker, and a fifth frame circuit breaker. One end of the third frame circuit breaker is connected to the other end of all the second protective switches, and the other end of the third frame circuit breaker is also connected to one end of the second voltage conversion device. The other end of the second voltage conversion device is connected to one end of the fourth frame circuit breaker, and the other end of the fourth frame circuit breaker is connected to one end of the fifth frame circuit breaker. The other end of the fifth frame circuit breaker is also connected to the other end of the second frame circuit breaker and the load.

7. The power supply system as described in claim 6, characterized in that, The second voltage conversion device includes a step-up transformer and an inverter. One end of the inverter is connected to the other end of the third frame circuit breaker, the other end of the inverter is connected to one end of the step-up transformer, and the other end of the step-up transformer is connected to one end of the fourth frame circuit breaker.

8. The power supply system as described in claim 4, characterized in that, The power supply system also includes two load-side components. Each load-side component includes a first load switch, a second load switch, and a step-down transformer. In each load-side component, one end of the first load switch is connected to the other end of the second frame circuit breaker, the other end of the first load switch is connected to one end of the step-down transformer, the other end of the step-down transformer is connected to one end of the second load switch, and the other end of the second load switch is connected to one input terminal of the load.

9. The power supply system as described in claim 8, characterized in that, The first frame circuit breaker and the second frame circuit breaker in the first line, the third frame circuit breaker, the fourth frame circuit breaker and the fifth frame circuit breaker in the second line, and the first load switch and the second load switch in the load end assembly are all VCB vacuum circuit breakers. The VCB vacuum circuit breakers all include a switch and an integrated protection device. The integrated protection device includes a parameter setting unit, a control unit, and a testing unit. The parameter setting unit is configured with synchronization setting parameters and a closing output command. The testing unit detects the electrical parameters on both sides of the switch. The control unit compares the electrical parameters with the synchronization setting parameters to obtain the synchronization result and controls the switch to close when synchronization is achieved.

10. The power supply system as described in claim 9, characterized in that, The synchronization parameters include the frequency difference, voltage difference, phase difference, and tripping delay at both ends of the switch.

Images