Control cabinet and control system
By introducing redundant design of conversion modules and power redundancy modules in the control cabinet, the problem of DC power devices failing to work when the main power supply or switching power supply fails is solved, thereby improving the stability and reliability of the control cabinet and reducing maintenance costs and selection waste.
Patent Information
- Application Number
- CN202520161711.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-23
AI Technical Summary
When the main power supply or switching power supply of the existing control cabinet fails, the DC power components cannot work properly, resulting in system instability and unreliability.
A conversion module is used to convert AC power to DC power, and a redundant design is achieved through a power redundancy module and a conductive module to ensure that in the event of a failure of the main power supply or the conversion module, power can be drawn from other control cabinets to ensure the normal operation of DC power devices.
It improves the system's stability and fault tolerance, ensures the continuous operation of critical equipment, reduces maintenance costs and waste of selected capacity, achieves seamless power switching, and enhances the system's safety and reliability.
Smart Images
Figure CN223912315U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electrical equipment technical field especially, it relates to a control cabinet and control system. BACKGROUND
[0002] Control cabinet is a kind of equipment for power system, switchgear, measuring instrument, protection electric appliance and auxiliary equipment are assembled in closed or semi-closed metal cabinet or screen according to electrical wiring requirements on it.The main function is to meet the requirements of normal operation of power system, facilitate overhaul, and do not endanger the safety of person and surrounding equipment.Control cabinet can be connected or broken by hand or automatic switch in normal operation;In the event of failure or abnormal operation, cut off the circuit or alarm with the help of protection electric appliance.In addition, some control cabinets can also display various parameters in operation, and adjust some electrical parameters, prompt or send signal to deviate from normal working state.
[0003] DC power supply in control cabinet is used to power supply for weak current equipment, secondary control circuit, sensor etc.At present, switching power supply is installed in control cabinet, the input end of switching power supply is electrically connected with main power supply, and the output end of switching power supply is electrically connected with DC electrical device;Main power supply is used to connect mains, and switching power supply is used to convert AC power output by main power supply into DC power, and output DC power to DC electrical device.Current main power supply of control cabinet will be affected once problem occurs, so that DC electrical device cannot work.
[0004] Therefore, how to ensure the normal work of DC electrical device when main power supply or switching power supply fails is an urgent problem to be solved in the industry. INVENTION CONTENTS
[0005] The utility model provides a control cabinet and control system to solve the defect that DC electrical device cannot work normally once main power supply or switching power supply fails in prior art.
[0006] The utility model provides a control cabinet, which comprises:
[0007] Main power supply, used to output AC power;
[0008] Conversion module, used to convert AC power into DC power;The input end of the conversion module is electrically connected with the main power supply;
[0009] Power supply redundancy module, the first input end of the power supply redundancy module is electrically connected with the output end of the conversion module;The output end of the power supply redundancy module is used to be electrically connected with DC electrical device;
[0010] Conductive module, the second input end of the power supply redundancy module is electrically connected with the conductive module of other control cabinet through the conductive module.
[0011] The control cabinet further comprises:
[0012] The first protection circuit is electrically connected between the output end of the main power supply and the input end of the conversion module.
[0013] Or / and.
[0014] The second protection circuit is electrically connected between the conductive module and the second input end of the power supply redundancy module.
[0015] The first protection circuit comprises at least one of a circuit breaker, a fuse, a disconnector or a residual-current device, or / and, the second protection circuit comprises at least one of a circuit breaker, a fuse, a disconnector or a residual-current device.
[0016] The conductive module comprises a metal piece.
[0017] The conversion module comprises a switching power supply.
[0018] The control cabinet further comprises:
[0019] A plurality of direct-current electrical devices, and input ends of the plurality of direct-current electrical devices are electrically connected to the output end of the power supply redundancy module.
[0020] The control cabinet further comprises:
[0021] A cabinet body, which has an accommodating cavity inside; the conversion module, the power supply redundancy module and the conductive module are all installed in the accommodating cavity.
[0022] The control cabinet further comprises:
[0023] A wiring terminal, which is installed on the outside of the cabinet body; the conductive module is electrically connected to the wiring terminal.
[0024] The second aspect of the utility model provides a control system, comprising the control cabinet of any one of the above.
[0025] The control system comprises a plurality of the control cabinets, and the conductive modules of the plurality of control cabinets are electrically connected through cables to form a looped network.
[0026] The control cabinet provided by the utility model can easily convert the alternating current provided by the main power supply into direct current through the conversion module. The conversion enables the control cabinet to provide stable power supply for the direct current electrical device, and improves the compatibility and flexibility of the system. In the case that the main power supply and the conversion module are not faulty, the conversion module can convert the alternating current output by the main power supply into direct current, and the power supply redundancy module can deliver the direct current to the direct current electrical device, so as to realize power supply for the direct current electrical device and ensure that the direct current electrical device can work normally. When the main power supply or the conversion module is faulty, the second input end of the power supply redundancy module is electrically connected with the conductive module of other control cabinets through the conductive module, the power supply redundancy module can take power from the conversion module of other control cabinets through the conductive module, realizes the access of the standby power supply, and ensures that the direct current electrical device can work normally when the main power supply or the conversion module is faulty. The redundant design greatly improves the stability and fault tolerance of the system, ensures the continuous operation of the key equipment, and solves the problem that the direct current electrical device cannot work normally once the main power supply or the switching power supply is faulty in the prior art. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0028] Figure 1 It is the principle diagram of the power supply redundancy module in the prior art.
[0029] Figure 2 It is the structural schematic diagram of the control cabinet provided by the utility model.
[0030] Figure 3 It is the structural schematic diagram of the control system provided by the utility model.
[0031] Corresponding relationship between the reference signs and the parts in the utility model is shown in the following table.
[0032] 100, main power supply; 200, conversion module; 300, power supply redundancy module; 400, conductive module; 500, first protection circuit; 600, second protection circuit; 700, direct current electrical device; 800, cabinet body; 900, wiring terminal. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be described clearly and completely in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.
[0034] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium. For the ordinary skilled in the art, the specific meaning of the above-mentioned term in the embodiment of the utility model can be understood according to the specific circumstances.
[0035] In the embodiment of the utility model, unless there is explicit provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "upper" and "upper surface" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under surface" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0036] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model embodiments. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.
[0037] Power redundancy is a common requirement for control cabinets in control systems. For relatively important control systems, the system is often required to be not powered off. There are three commonly used schemes at present.
[0038] The first solution is to increase the UPS (Uninterruptible Power Supply), that is, the uninterruptible power supply, which can be put into operation without disturbance when the original system power supply fails, but the existing online UPS uninterruptible power supply costs too high, and it is unnecessary for some project scenarios.
[0039] The second solution is to provide two power supplies for the control system, and realize the backup power supply through the double power supply switch. According to the structural characteristics of the double power supply switch, even the best performance switch cannot achieve disturbance-free operation. In other words, the double power supply switch solution cannot realize disturbance-free switching and cannot guarantee the continuous operation of the control system.
[0040] The third solution is to use two switching power supplies in parallel through a power supply redundancy module. Such a solution can only solve the backup problem when the switching power supply itself fails. Since the two parallel switching power supplies are powered from the main power supply in the control cabinet, if the main power supply in the control cabinet fails, all parallel switching power supplies will lose their functions, thus the DC power supply device still cannot work.
[0041] The control cabinet and the control system of the utility model will be described in detail below. Figure 2 and Figure 3 The structure and working principle of the control cabinet and the control system of the utility model will be described in detail below. Among them, Figure 2 is a structural schematic view of the control cabinet provided by the utility model. Figure 3 is a structural schematic view of the control system provided by the utility model.
[0042] As Figure 2 described, the utility model provides a control cabinet. The control cabinet comprises a main power supply 100, a conversion module 200, a power supply redundancy module 300 and a conductive module 400. The main power supply 100 is used for outputting alternating current; the conversion module 200 is used for converting alternating current into direct current; the input end of the conversion module 200 is electrically connected with the main power supply 100; the first input end of the power supply redundancy module 300 is electrically connected with the output end of the conversion module 200; the output end of the power supply redundancy module 300 is used for being electrically connected with the direct current electrical device 700; the second input end of the power supply redundancy module 300 is used for being electrically connected with the conductive module 400 of other control cabinets through the conductive module 400.
[0043] In this embodiment, through the conversion module 200, the control cabinet can easily convert the alternating current provided by the main power supply 100 into direct current. This conversion enables the control cabinet to provide stable power supply for the direct current electrical devices 700, improving the compatibility and flexibility of the system. In the case that the main power supply 100 and the conversion module 200 are not faulty, the conversion module 200 can convert the alternating current output by the main power supply 100 into direct current, and the power redundancy module 300 can deliver the direct current to the direct current electrical devices 700, realizing power supply to the direct current electrical devices 700 and ensuring that the direct current electrical devices 700 can work normally. In the case that the main power supply 100 or the conversion module 200 is faulty, the second input end of the power redundancy module 300 is electrically connected to the conductive module 400 of other control cabinets, and the power redundancy module 300 can take power from the conversion module 200 of other control cabinets through the conductive module 400, realizing the access of the standby power supply and ensuring that the direct current electrical devices 700 can work normally when the main power supply 100 or the conversion module 200 is faulty. This redundant design greatly improves the stability and fault tolerance of the system, ensures the continuous operation of critical equipment, and solves the problem in the prior art that the direct current electrical devices 700 cannot work normally once the main power supply 100 or the switching power supply is faulty.
[0044] In addition, through the interconnection of the conductive module 400 with other control cabinets, this design makes the system easy to expand and also reduces the selection capacity of the conversion module 200, solving the problem of waste of excess selection capacity. When more direct current electrical devices 700 or control cabinets need to be added, they can be simply connected through the conductive module 400. In addition, this modular design also facilitates the maintenance and repair of the system, reducing maintenance costs. The use of the power redundancy module 300 and the conversion module 200 helps to optimize power distribution and reduce energy waste. At the same time, this design also improves the safety of the system, reducing the risk of equipment damage or downtime caused by power failure through redundant protection. Due to the power redundancy function, this control cabinet can provide more stable power output when facing power fluctuations or failures, thereby enhancing the reliability of the entire system. Compared with the existing UPS uninterruptible power supply scheme, the cost of the embodiment is lower and waste is avoided. Compared with the dual power switching switch scheme, the embodiment can also realize non-disturbance switching, ensuring the continuous operation of the direct current electrical devices 700. Compared with the parallel connection scheme of 2 switching power supplies through the power redundancy module 300, the control cabinet in this embodiment uses one conversion module, which can reduce material costs.
[0045] It can be understood that UPS, which stands for Uninterruptible Power Supply, is an uninterruptible power supply containing energy storage devices. It is mainly used to provide uninterrupted power supply for some equipment with high requirements for power stability. When the mains input is normal, the UPS will supply the mains after voltage stabilization to the load, at this time the UPS is an AC power stabilizer, and it also charges the battery in the machine; when the mains is interrupted (accidental power failure), the UPS immediately converts the DC power of the battery to 220V AC power to the load through the inverter switching method, so that the load maintains normal operation and protects the load software and hardware from damage. UPS devices usually provide protection against both high and low voltage.
[0046] It can be understood that the power redundancy module is a key component for improving system reliability and availability, which ensures the system continues to run when the main power fails by providing backup power. The redundant power module usually includes two or more power units, one of which serves as the main power supply and the other as the backup power supply. When the main power fails, the redundant power module can quickly switch to the backup power supply to ensure that the system will not be interrupted. The schematic diagram of the power redundancy module is shown in Figure 1
[0047] As shown in Figure 2 In some embodiments, the control cabinet includes a first protection circuit 500 or / and a second protection circuit 600. The output end of the main power supply 100 is electrically connected to the input end of the conversion module 200 through the first protection circuit 500; the conductive module 400 is electrically connected to the second input end of the power redundancy module 300 through the second protection circuit 600. Specifically, the input end of the first protection circuit 500 is electrically connected to the output end of the main power supply 100, and the output end of the first protection circuit 500 is electrically connected to the input end of the conversion module 200. When the current or voltage passing through the first protection circuit 500 exceeds the first threshold value, the first protection circuit 500 is disconnected, and the first protection circuit 500 plays a role in protecting the conversion module 200. The input end of the second protection circuit 600 is electrically connected to the conductive module 400, and the output end of the second protection circuit 600 is electrically connected to the second input end of the power redundancy module 300. When the current or voltage passing through the second protection circuit 600 exceeds the second threshold value, the second protection circuit 600 is disconnected, and the second protection circuit 600 plays a role in protecting the power redundancy module 300.
[0048] In the present embodiment, the first protection circuit 500 and the second protection circuit 600 can protect different parts of the circuit respectively, effectively preventing electrical failures caused by damage to electrical components, aging of the circuit, and the like. The protection circuit can quickly detect short-circuit current and cut off the relevant circuit, thereby avoiding further damage to the equipment and system caused by short-circuit. By providing additional electrical protection, the risk of safety accidents such as electric shock and fire is reduced, and the safety of personnel and equipment is ensured. When the main power supply 100 fails, the conductive module 400 is electrically connected to the second input end of the power supply redundancy module 300 through the second protection circuit 600, realizing the redundant switching of the power supply and ensuring the continuous power supply of the system. The power supply redundancy and fault switching function improves the fault tolerance of the system, so that the system can still operate normally when some components fail. The introduction of the protection circuit makes the maintenance of the electrical system more simple and clear, and when a fault occurs, the problem can be quickly located by checking the state of the protection circuit.
[0049] Further, the first protection circuit 500 includes at least one of a circuit breaker, a fuse, a disconnector, or an earth leakage protector. Preferably, the first protection circuit 500 is a circuit breaker.
[0050] Further, the second protection circuit 600 includes at least one of a circuit breaker, a fuse, a disconnector, or an earth leakage protector. Preferably, the second protection circuit 600 is a circuit breaker.
[0051] It can be understood that a circuit breaker is a switching device that can close, carry, and open the current under normal circuit conditions, and can close, carry, and open the current under abnormal circuit conditions within a specified time. The circuit breaker has the functions of overload protection and short-circuit protection, and automatically cuts off the power supply when the current exceeds the set value, protecting the safe operation of the circuit and electrical equipment.
[0052] In some embodiments, the conversion module 200 includes a switching power supply.
[0053] It can be understood that a switching power supply, also known as a switch mode power supply (SMPS), is also known as a switching power supply or a switching converter, which is a kind of high-frequency power conversion device and a power supply. Its function is to convert a voltage of one level into a voltage or current required by the user end through different forms of architecture. The input of the switching power supply is mostly alternating current power (such as mains) or direct current power, and the output is mostly devices that require direct current power, such as personal computers, and the switching power supply converts the voltage and current between the two.
[0054] In some embodiments, the conductive module 400 includes a metal piece. Preferably, the metal piece is a copper bar. The conductive performance of the metal piece is utilized, and the structure is simple and the cost is low.
[0055] Specifically, the conductive module 400 includes a positive copper bar and a negative copper bar; the positive copper bar and the negative copper bar are both electrically connected with the input end of the circuit breaker through wires, and the positive copper bar and the negative copper bar are also electrically connected with the conductive module 400 of other control cabinets through wires. It can be understood that the positive copper bar is electrically connected with the positive copper bar of other control cabinets, and the negative copper bar is electrically connected with the negative copper bar of other control cabinets.
[0056] In some embodiments, the control cabinet further includes a plurality of DC electrical devices 700; the input end of each of the plurality of DC electrical devices 700 is electrically connected with the output end of the power redundancy module 300. As the system demand grows, more DC electrical devices 700 can be conveniently added, and power distribution and management can be performed through the power redundancy module 300, without the need for large-scale modification of the existing system.
[0057] It can be understood that the DC electrical device 700 includes weak current equipment, secondary control loop or / and sensor and the like existing in the existing control cabinet. In this embodiment, no detailed description is made.
[0058] In some embodiments, the control cabinet includes a cabinet body 800; the inside of the cabinet body 800 has a containing cavity; the conversion module 200, the power redundancy module 300 and the conductive module 400 are all installed in the containing cavity. By installing the conversion module 200, the power redundancy module 300 and the conductive module 400 in the containing cavity, a safe use environment can be provided for the conversion module 200, the power redundancy module 300 and the conductive module 400, and the service life of each module is improved.
[0059] In some embodiments, the control cabinet further includes a wiring terminal 900; the wiring terminal 900 is installed on the outside of the cabinet body 800; the conductive module 400 is electrically connected with the wiring terminal 900. By installing the wiring terminal 900 on the outside of the cabinet body 800, the conductive modules 400 of a plurality of control cabinets can be conveniently electrically connected.
[0060] As Figure 3 shown, the second aspect of the embodiments of the utility model provides a kind of control system. The control system includes the control cabinet of any embodiment described above.
[0061] In this embodiment, because it includes the control cabinet of any embodiment described above, it at least has the advantages described above, and will not be repeated here.
[0062] As Figure 3As shown, further, the control system comprises a plurality of control cabinets; the conductive modules 400 of the plurality of control cabinets are electrically connected by cables to form a looped network. By electrically connecting the conductive modules 400 of the plurality of control cabinets, when the main power supply 100 or the conversion module 200 of one control cabinet fails, the conversion module 200 of other normal control cabinets can serve as a backup power supply to supply power to the DC electrical devices 700 of the failed control cabinet, ensuring that the DC electrical devices 700 of the failed control cabinet can operate normally.
[0063] It should be noted that when the main power supply 100 and the switching power supply of the control cabinet itself are normal, the switching power supply of other normal control cabinets can also supply power to the DC electrical devices 700 of the control cabinet through the power supply redundancy module 300. In order to facilitate understanding, taking the control system comprising two control cabinets as an example, the first control cabinet is normal, that is, the first control cabinet has no failure, and the conversion module of the first control cabinet supplies power to the DC electrical devices 700 through the power supply redundancy module 300. At this time, the second control cabinet is also normal and has no failure, and the conversion module 200 of the second control cabinet supplies power to the DC electrical devices 700 of the first control cabinet through the conductive module 400 and the power supply redundancy module 300. Such design can reduce the selection capacity of the switching power supply in a single control cabinet, and can solve the problem of excessive selection capacity of the switching power supply.
[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A control cabinet, characterized in that The control cabinet comprises: a main power supply (100) for outputting alternating current; a conversion module (200) for converting the alternating current into direct current; an input end of the conversion module (200) is electrically connected with the main power supply (100); a power supply redundancy module (300), a first input end of the power supply redundancy module (300) is electrically connected with an output end of the conversion module (200); an output end of the power supply redundancy module (300) is used for being electrically connected with a direct current electrical device (700); a conductive module (400), a second input end of the power supply redundancy module (300) is electrically connected with the conductive module (400) of another control cabinet through the conductive module (400).
2. The control cabinet of claim 1, wherein, Further comprising: a first protection circuit (500), an output end of the main power supply (100) is electrically connected with the input end of the conversion module (200) through the first protection circuit (500); or / and; a second protection circuit (600), the conductive module (400) is electrically connected with the second input end of the power supply redundancy module (300) through the second protection circuit (600).
3. The control cabinet of claim 2, wherein, The first protection circuit (500) comprises at least one of a circuit breaker, a fuse, a disconnector or a leakage protector, or / and, the second protection circuit (600) comprises at least one of a circuit breaker, a fuse, a disconnector or a leakage protector.
4. The control cabinet of claim 1, wherein, The conductive module (400) comprises a metal piece.
5. The control cabinet of claim 1, wherein, The conversion module (200) comprises a switching power supply.
6. The control cabinet of claim 1, wherein, Further comprising: a plurality of direct current electrical devices (700), input ends of the plurality of direct current electrical devices (700) are electrically connected with the output end of the power supply redundancy module (300).
7. The control cabinet according to any one of claims 1 to 6, characterized in that Further comprising: a cabinet body (800) having an accommodating cavity inside; the conversion module (200), the power supply redundancy module (300) and the conductive module (400) are all installed in the accommodating cavity.
8. The control cabinet of claim 7, wherein, Further comprising: a wiring terminal (900) installed on the outside of the cabinet body (800); the conductive module (400) is electrically connected with the wiring terminal (900).
9. A control system characterized by, The control cabinet comprises any one of claims 1 to 8.
10. The control system of claim 9, wherein, A plurality of the control cabinets are electrically connected through cables to form a ring network.