Power supply and distribution system based on closed-loop system
By using a closed-loop power supply and distribution system, and leveraging electrical automation control technology and power switching devices, load arbitration and redundancy backup of main and backup power supplies are achieved. This solves the problem of multiple loads operating under tight power supply capacity and improves power supply reliability and security.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-04-14
AI Technical Summary
Existing power supply and distribution facilities, when the installed/configured capacity of power equipment is tight, cannot effectively meet the power demand of multiple loads, leading to power overload or damage, affecting power supply stability, and posing risks, especially during the switching of main and backup power supplies.
The power supply and distribution system adopts a closed-loop system, including independently operating power supply modules and distribution modules. It utilizes power switching devices such as circuit breakers and contactors, combined with electrical automation control technology, to realize backup mechanisms and load arbitration, providing two power sources, namely primary and backup, to avoid overload and improve power supply reliability.
By using load arbitration and redundant backup of primary and backup power supplies, power overload is avoided, the probability of abnormal power outages is reduced, power supply reliability and safety are improved, operation procedures are simplified, and the technical requirements for operators are reduced.
Smart Images
Figure CN224123932U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power system control, and more particularly to a power supply and distribution system based on a closed-loop system. Background Technology
[0002] Most existing power supply and distribution devices only use circuit breakers to provide delayed and instantaneous protection against abnormal conditions such as overload and short circuit of downstream loads, promptly disconnecting faulty branches to prevent further expansion of the fault and protect the stability of upstream power supply and distribution. The above technology can only realize power supply and distribution control and protection functions when the installed / configured capacity of the power equipment can meet the requirements of all downstream loads.
[0003] 2) Currently, it's common for a single power supply unit to be used in a time-sharing manner to meet the power needs of multiple loads. This need is particularly pronounced when power equipment installation / configuration capacity is limited. In the aforementioned power supply / distribution scenarios, improper operation could lead to a situation where the total load connected to a single power supply unit exceeds its rated capacity, causing the power supply unit to overload, resulting in power outages or even damage, escalating the fault, and affecting power supply stability. Based on the above, loads with high power supply stability requirements necessitate a switchover connection between primary and backup power supplies.
[0004] 3) As the above analysis shows, existing power supply and distribution equipment cannot adapt to application scenarios where a single power supply unit is used in a time-sharing manner to meet the power demands of multiple loads. Currently, electrical automation technology is mature and has long been applied in industrial control. Combining electrical automation technologies with the aforementioned application scenarios to develop a new type of universal, modular, safe power supply and distribution device based on closed-loop control is of great significance for solving the problem of safe power supply in power supply and distribution systems with power supply-load capacity mismatch. Therefore, how to provide a power supply and distribution device that solves this mismatch problem is an urgent technical issue that needs to be addressed. Utility Model Content
[0005] This utility model provides a closed-loop power supply and distribution system, which includes at least a power supply module, a distribution module, and a load module. The power supply module is connected to the load module through the distribution module. The power supply module includes a first power supply module and a second power supply module, and the distribution module includes a first distribution module and a second distribution module. The two power supply and distribution networks operate independently. The first distribution module is connected to multiple load modules, and the second distribution module is connected to multiple load modules. The first and second distribution modules are also connected to a backup power supply. Utilizing electrical automation control technology and relying on power switching devices such as circuit breakers and contactors, a safe power supply and distribution system with a backup mechanism and unequal power supply-load capacity can be implemented. This avoids excessive loads connecting simultaneously, which could lead to power overload and expand the power outage area. It can provide two power sources, a primary and a backup, to form redundancy and improve the reliability of the system power supply.
[0006] Furthermore, the first power distribution module includes a first circuit breaker, a second circuit breaker, and multiple load contactors. The first circuit breaker is connected to the normal power input port, and the first circuit breaker is connected to the load through the multiple first load contactors. Each first load contactor corresponds to a load.
[0007] Furthermore, the second circuit breaker is connected to the backup power input port, the second circuit breaker is connected to the first end of the first bus tie contactor, and the second end of the first bus tie contactor is connected to the first end of the first load contactor.
[0008] Optionally, the second power distribution module includes a third circuit breaker, a fourth circuit breaker, and multiple second load contactors. The third circuit breaker is connected to the normal power supply input port, and the third circuit breaker is connected to the load through the multiple second load contactors. Each second load contactor corresponds to a load.
[0009] Optionally, the fourth circuit breaker is connected to the backup power supply input port, the fourth circuit breaker is connected to the first end of the second bus tie contactor, and the second end of the second bus tie contactor is connected to the first end of the second load contactor.
[0010] Optionally, the first power distribution module may further include a first control module.
[0011] Optionally, the second power distribution module further includes a second control module, and the first control module communicates with the first control module.
[0012] Optionally, the first control module and the second control module are PLC controllers.
[0013] Optionally, the first control module and the second control module are microcontrollers.
[0014] Optionally, the first power module and the second power module are three-phase AC power supplies.
[0015] Compared with existing motor starting devices, the power supply and distribution system based on a closed-loop system provided by this utility model has the following advantages: The power supply and distribution system includes at least a power supply module, a distribution module, and a load module. The power supply module is connected to the load module through the distribution module. The power supply module includes a first power supply module and a second power supply module, and the distribution module includes a first distribution module and a second distribution module. The two power supply and distribution networks operate independently. The first distribution module is connected to multiple load modules, and the second distribution module is connected to multiple load modules. The first and second distribution modules are also connected to a backup power supply. Utilizing electrical automation control technology and relying on power switching devices such as circuit breakers and contactors, a safe power supply and distribution operation with a backup mechanism and unequal power supply-load capacity is achieved. This avoids excessive loads being connected simultaneously, which could lead to power overload and expand the power outage range. It can provide two power sources, a primary and a backup, to form redundancy and improve the reliability of the system power supply. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the power supply and distribution system based on a closed-loop system in this application;
[0017] Figure 2 This is a schematic diagram of another power supply and distribution system based on a closed-loop system in this application;
[0018] Figure 3 This is the software logic flowchart in this application. Detailed Implementation
[0019] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings:
[0020] like Figure 1 As shown, the power supply and distribution system based on the closed-loop system in this embodiment includes at least a power supply module 101, a power distribution module 102 and a load module 103. The power supply module 101 is connected to the load module 103 through the power distribution module 102.
[0021] The power module 101 includes a first power module and a second power module, and the power distribution module 102 includes a first power distribution module and a second power distribution module. The two power distribution networks operate independently. The first power distribution module is connected to multiple load modules 103, and the second power distribution module is connected to multiple load modules. The first power distribution module and the second power distribution module are also connected to a backup power supply.
[0022] Figure 2The diagram shows the minimum system of a power supply and distribution system based on a closed-loop system, consisting of three main parts: power sources, distribution units, and loads. Power source 1 and power source 2 are two independent devices, providing two independent power sources, connected to distribution units #1 and #2 respectively. Under normal circumstances, the two power supply and distribution networks operate independently—power source 1-distribution unit #1-loads form an independent power supply and distribution network. Distribution unit #1 performs logical arbitration control for downstream loads connecting to power source 1, preventing the total connected power from exceeding the power source capacity, while also ensuring relay protection for each connected load; power source 2-distribution unit #2-loads form an independent power supply and distribution network. Distribution unit #1 performs logical arbitration control for downstream loads connecting to power source 1, preventing the total connected power from exceeding the power source capacity, while also ensuring relay protection for each connected load.
[0023] Furthermore, the first power distribution module includes a first circuit breaker Q1-1, a second circuit breaker Q1-2, and multiple load contactors. The first circuit breaker is connected to the normal power input port, and the first circuit breaker is connected to the load through multiple first load contactors. Each first load contactor corresponds to a load.
[0024] Furthermore, the second circuit breaker is connected to the backup power input port, the second circuit breaker is connected to the first terminal of the first bus tie contactor, and the second terminal of the first bus tie contactor is connected to the first terminal of the first load contactor.
[0025] Optionally, the second power distribution module includes a third circuit breaker Q2-1, a fourth circuit breaker Q2-2, and multiple second load contactors. The third circuit breaker Q2-1 is connected to the normal power supply input port, and the third circuit breaker is connected to the load through multiple second load contactors. Each second load contactor corresponds to a load.
[0026] Optionally, the fourth circuit breaker is connected to the backup power input port, the fourth circuit breaker is connected to the first terminal of the second bus tie contactor, and the second terminal of the second bus tie contactor is connected to the first terminal of the second load contactor.
[0027] Optionally, the first power distribution module may also include a first control module.
[0028] Optionally, the second power distribution module may also include a second control module, and the first control module communicates with the first control module.
[0029] Optionally, the first control module and the second control module are PLC controllers.
[0030] Optionally, the first control module and the second control module are microcontrollers.
[0031] Optionally, the first power module and the second power module are three-phase AC power supplies.
[0032] For details on the specific components and installation locations of this utility model, please refer to [link / reference]. Figure 2 It mainly includes: 1- Normal power supply input port, 2- Backup power supply input / output port, 3- Circuit breaker (Q1-1, Q1-2, Q2-1, Q2-2), 4- Load contactor (KM1-x, KM2-x, where x is the number of load branches), 5- Bus tie contactor (KM1-L, KM2-L), 6- Controller.
[0033] The normal power input port is the normal power input port for the power distribution device. Internally connected are 3-circuit breakers (Q1-1, Q2-1), which operate under the control of the 6-controller, enabling on / off control of the external power input and overload and short-circuit protection. The 2-backup power input / output port is the backup power input / output port for the power distribution device. Power flows bidirectionally from the power distribution device with a normal external power supply to the power distribution device with a faulty external power supply. In the event of a power failure at the normal power input port, the power distribution devices can work together to ensure normal power supply to downstream loads. Internally connected are 3- Circuit breakers (Q1-2, Q2-2), operating under the control of controller 6, provide on / off control of external power input and overload and short-circuit protection. Load contactors (KM1-x, KM2-x, where x represents the number of load branches), operating under controller 6, provide on / off control of external load input and overload and short-circuit protection. Busbar interconnection contactors (KM1-L, KM2-L), operating under controller 6, provide logical interlocking between normal and backup power inputs, preventing short circuits or other dangerous conditions caused by parallel operation of two power sources. Controller 6 runs the power distribution control software and is the control center of the power distribution system. It controls the opening and closing of all internal circuit breakers and contactors, preventing overload and providing protection for downstream loads and upstream power sources. Simultaneously supporting collaborative operation, the controllers of the two power distribution units are interconnected through an information interface, enabling coordinated operation of the two power distribution cabinets and achieving safe automatic switching between main and backup power supplies, thus improving power distribution safety and reliability. See section 6 for details of the controller's software logic. Figure 3 .
[0034] Figure 2 The diagram shows the main components of the power distribution unit. Key components include: 1- Normal power input port; 2- Backup power input / output port, all of which use common technologies and components in power distribution equipment; 3- Circuit breakers (Q1-1, Q1-2, Q2-1, Q2-2) equipped with electrically operated mechanisms; 4- Load contactors (KM1-x, KM2-x, where x represents the number of load branches); 5- Bus tie contactors (KM1-L, KM2-L), all of which are common off-the-shelf products in power distribution equipment; 6- Controller hardware can use mature off-the-shelf products in the electrical control field, and the software is embedded software, which needs to be customized according to... Figure 3The control logic flowchart was developed.
[0035] The technical effects achieved by this utility model embodiment are as follows: Arbitration control of load access can avoid power instability caused by imbalance in power supply and distribution capacity. The safe redundancy backup switching logic control of the main and backup power sources can automatically and safely switch between the main and backup power supplies, preventing power system failures caused by parallel operation of other power sources. The backup power supply interface based on bidirectional energy flow can significantly improve the reliability of load power supply. The probability of abnormal power outages due to load capacity exceeding power supply capacity is reduced to 0%. Power supply reliability is improved by 100% with both main and backup power supplies. Power supply and distribution are entirely controlled by software programs; operators only need to input control commands, significantly reducing labor intensity, improving the safety of power supply and distribution operations, and lowering the educational requirements for operators.
[0036] Compared with existing motor starting devices, the power supply and distribution system based on a closed-loop system provided by this utility model has the following advantages: The power supply and distribution system includes at least a power supply module, a distribution module, and a load module. The power supply module is connected to the load module through the distribution module. The power supply module includes a first power supply module and a second power supply module, and the distribution module includes a first distribution module and a second distribution module. The two power supply and distribution networks operate independently. The first distribution module is connected to multiple load modules, and the second distribution module is connected to multiple load modules. The first and second distribution modules are also connected to a backup power supply. Utilizing electrical automation control technology and relying on power switching devices such as circuit breakers and contactors, a safe power supply and distribution operation is achieved in a power supply and distribution system with a backup mechanism and unequal power supply-load capacity. This avoids excessive loads being connected simultaneously, which could lead to power overload and expand the power outage area. It can provide two power sources, a main one and a backup one, to form redundancy and improve the reliability of the system power supply.
[0037] Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.
[0038] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A power supply and distribution system based on a closed-loop system, characterized in that, The power supply and distribution system includes at least a power module, a power distribution module, and a load module, wherein the power module is connected to the load module through the power distribution module; The power supply module includes a first power supply module and a second power supply module, and the power distribution module includes a first power distribution module and a second power distribution module. The first power supply module is connected to the load module through the first power distribution module to form a first power supply and distribution network, and the second power supply module is connected to the load module through the second power distribution module to form a second power supply and distribution network. The first power supply and distribution network and the second power supply and distribution network operate independently. The first power distribution module and the second power distribution module are also connected to a backup power supply.
2. The power supply and distribution system based on a closed-loop system according to claim 1, characterized in that, The first power distribution module includes a first circuit breaker, a second circuit breaker, and multiple first load contactors. The first circuit breaker is connected to the normal power input port, and the first circuit breaker is connected to the load through the multiple first load contactors. Each first load contactor corresponds to a load.
3. A power supply and distribution system based on a closed-loop system according to claim 2, characterized in that, The second circuit breaker is connected to the backup power input port, the second circuit breaker is connected to the first end of the first bus tie contactor, and the second end of the first bus tie contactor is connected to the first end of the first load contactor.
4. A power supply and distribution system based on a closed-loop system according to claim 3, characterized in that, The second power distribution module includes a third circuit breaker, a fourth circuit breaker, and multiple second load contactors. The third circuit breaker is connected to the normal power input port, and the third circuit breaker is connected to the load through the multiple second load contactors. Each second load contactor corresponds to a load.
5. A power supply and distribution system based on a closed-loop system according to claim 4, characterized in that, The fourth circuit breaker is connected to the backup power input port, and the fourth circuit breaker is connected to the first end of the second bus tie contactor. The second end of the second bus tie contactor is connected to the first end of the second load contactor.
6. A power supply and distribution system based on a closed-loop system according to claim 1, characterized in that, The first power distribution module also includes a first control module.
7. A power supply and distribution system based on a closed-loop system according to claim 6, characterized in that, The second power distribution module also includes a second control module, and the first control module communicates with the first control module.
8. A power supply and distribution system based on a closed-loop system according to claim 7, characterized in that, The first control module and the second control module are PLC controllers.
9. A power supply and distribution system based on a closed-loop system according to claim 7, characterized in that, The first control module and the second control module are microcontrollers.
10. A power supply and distribution system based on a closed-loop system according to claim 1, characterized in that, The first power module and the second power module are three-phase AC power supplies.