5G integrated intelligent power cabinet based on infrastructure energy-saving technology

Abstract

The application discloses a 5G integrated intelligent power supply cabinet based on infrastructure energy-saving technology and belongs to the technical field of power supply cabinets. The power supply cabinet comprises a cabinet body, a commercial power input unit, a rectifier unit, an energy storage unit, a direct-current power distribution unit, a monitoring unit, a control unit and a power supply path switching assembly in the cabinet body. The switching assembly comprises multiple fixed busbars and a movable conductive bridge, and can switch the power supply path between commercial power rectification power supply and energy storage power supply. The monitoring unit collects multiple electrical parameters, and the control unit drives the conductive bridge to perform complete switching or low-amplitude refreshing based on a switching determination value, so as to improve the reliability and energy efficiency of the contact interface. The design of the application effectively suppresses frequent invalid switching, reduces the contact resistance and temperature rise, enhances the operation stability and service life of the equipment, and is suitable for the dynamic 5G infrastructure power supply environment.

Description

Technical Field

[0001] This invention mainly relates to the technical field of power cabinets, specifically a 5G integrated smart power cabinet based on infrastructure energy-saving technology. Background Technology

[0002] With the large-scale deployment of 5G base stations, edge computing nodes, aggregation access equipment, and related supporting infrastructure, power supply cabinets, as key carriers integrating power supply, rectification, energy storage, power distribution, and protection, are evolving from traditional fixed power supply modes towards dynamic, intelligent, and energy-saving directions. In 5G infrastructure scenarios, equipment loads fluctuate frequently with service changes, and the mains power efficiency, energy storage state of charge, and bus voltage are all dynamically changing. Therefore, the power supply path needs to switch or coordinate between mains rectification power supply and energy storage power supply to balance power supply reliability and operational energy efficiency.

[0003] Existing 5G power cabinets typically rely on a single sensor parameter for power path switching, such as load threshold, temperature threshold, or energy storage state of charge threshold as trigger conditions. This single-threshold control method has significant shortcomings: First, the switching judgment is too simplistic. When the monitored parameter fluctuates around the threshold, it easily leads to repeated and jittery switching, which increases additional losses and mechanical wear. Second, the switching decision only focuses on whether it is triggered, lacking a comprehensive assessment of the benefits and costs of the switching. This makes it difficult to avoid switching without any benefit, preventing the switching from truly serving the overall cabinet energy efficiency optimization.

[0004] Furthermore, power path switching within the power cabinet is typically achieved by movable actuators. However, over long-term operation, the conductive contact interfaces of these actuators gradually degrade due to oxide film formation, particle adhesion, and continuous current flow, leading to increased contact resistance, contact temperature rise, and conduction losses. Existing solutions often treat power switching and contact maintenance as independent issues, requiring additional cleaning mechanisms or periodic manual maintenance, which increases structural complexity and maintenance costs. Simultaneously, when the power cabinet operates under stable power supply conditions for extended periods without power path switching, its contact interfaces lack effective renewal methods, posing a risk of unattended aging of the contact surfaces.

[0005] Therefore, there is an urgent need for a 5G integrated smart power cabinet that can coordinate power supply path switching decisions, contact interface maintenance, and infrastructure energy-saving requirements. This cabinet can avoid ineffective and repeated switching, and suppress contact interface degradation without adding an independent cleaning mechanism, thereby improving the overall cabinet energy efficiency and long-term operational reliability. Summary of the Invention

[0006] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the present invention mainly provides a 5G integrated smart power cabinet based on infrastructure energy-saving technology to solve the technical problems mentioned in the background.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A 5G integrated smart power cabinet based on infrastructure energy-saving technology includes a cabinet body, which is equipped with a mains power input unit, a rectifier unit, an energy storage unit, a DC power distribution unit, a monitoring unit, a control unit, and a power supply path switching component.

[0009] The power supply path switching component includes a first fixed busbar, a second fixed busbar, a third fixed busbar, a movable conductive bridge, a guide seat, a driving component, and a position feedback component; the first fixed busbar is electrically connected to the rectifier unit, the second fixed busbar is electrically connected to the energy storage unit, and the third fixed busbar is electrically connected to the DC power distribution unit.

[0010] The movable conductive bridge is disposed on the guide seat, the guide seat is provided with multiple contact positions and limiting parts corresponding to the multiple contact positions one by one, and the driving member is used to drive the movable conductive bridge to move along the guide seat between the multiple contact positions, so as to switch the power supply path between mains rectified direct supply and energy storage power supply.

[0011] The monitoring unit is used to collect load power, DC bus voltage, energy storage state of charge, rectifier unit output current, contact resistance and contact temperature rise.

[0012] The control unit is used to calculate the complete switching judgment value K and the low-amplitude refresh judgment value F based on the data collected by the monitoring unit, and control the driving unit to drive the movable conductive bridge to perform complete power supply path switching or low-amplitude refresh switching based on the complete switching judgment values ​​K and F.

[0013] The complete power supply path switching involves a movable conductive bridge moving between different contact positions to change the power supply path; the movement distance of the low-amplitude refresh switching is less than that of the complete power supply path switching, and the movable conductive bridge, while maintaining electrical connection with the currently contacted fixed busbar and without changing the power supply path, forms a short-range relative sliding with the currently contacted fixed busbar to update the contact interface and reduce the contact resistance.

[0014] Preferably, the formula for calculating the complete switching determination value K is:

[0015] (1);

[0016] in, The expected benefits of power supply path switching are obtained by weighting the expected energy savings, bus stability improvement, rectifier unit output current adaptation improvement, and temperature rise improvement. The expected cost of power supply path switching is obtained by weighting switching additional losses, contact wear costs, drive energy consumption, and frequent switching penalties.

[0017] When the complete handover determination value K is greater than or equal to the preset complete handover threshold And the duration of the current power supply path is not less than the minimum dwell time. At that time, the control unit controls the driving component to drive the movable conductive bridge to perform a complete power supply path switching.

[0018] Preferably, the frequent switching penalty amount is determined by the frequent switching penalty coefficient. The frequent switching penalty coefficient is determined by multiplying the reference energy consumption for a single switch by the reference energy consumption. Calculate using the following formula:

[0019] (2);

[0020] in, This represents the number of complete power supply path switching operations performed within a preset time window. This represents the maximum number of complete power supply path switching allowed within a preset time window. To preset the minimum switching interval, The time interval since the last complete power supply path switch; the frequent switching penalty amount Used to suppress repeated triggering of complete power path switching near a threshold.

[0021] Preferably, the low-amplitude refresh determination value F is calculated according to the following formula:

[0022] (3);

[0023] in, The degree of contact resistance degradation is determined by the offset of the current contact resistance relative to the rated contact resistance and the rate of change of the contact resistance. The degree of contact temperature rise degradation is determined by the deviation of the current contact temperature rise from the calibrated contact temperature rise and the rate of change of the contact temperature rise; The amount of refresh suppression is determined by the number of low-amplitude refresh switching operations and the cumulative low-amplitude refresh travel within the preset time window; , , These are the corresponding weighting coefficients;

[0024] When the low-amplitude refresh judgment value F is greater than or equal to the preset refresh threshold And the complete handover determination value K is less than the preset complete handover threshold. At that time, the control unit controls the driving component to drive the movable conductive bridge to perform low-amplitude refresh switching.

[0025] Preferably, the low-amplitude refresh switching includes a forward refresh segment and a reverse reset segment. The forward refresh segment causes the movable conductive bridge to undergo a short-range relative slip along the currently contacting fixed busbar, and the reverse reset segment causes the movable conductive bridge to return to the contact position before the low-amplitude refresh switching. During the low-amplitude refresh switching process, the power supply path between the rectifier unit, the energy storage unit, and the DC power distribution unit remains unchanged.

[0026] Preferably, the plurality of contact positions includes at least a first contact position and a second contact position;

[0027] When the movable conductive bridge is in the first contact position, the rectifier unit supplies power to the DC power distribution unit through the first fixed busbar and the third fixed busbar;

[0028] When the movable conductive bridge is in the second contact position, the energy storage unit supplies power to the DC power distribution unit through the second fixed busbar and the third fixed busbar.

[0029] Preferably, the position feedback device is any one of a limit switch, a Hall sensor, or an encoder. The position feedback device is used to detect whether the movable conductive bridge has reached the corresponding limit part and to feed back a position signal to the control unit. The control unit confirms whether the complete power supply path switching or low-amplitude refresh switching is completed based on the position signal, so as to form a closed loop of switching action of perception-decision-execution-feedback.

[0030] Preferably, the driving component is any one of an electric actuator, a linear module, or a stepper motor; the energy storage unit is at least one of a battery pack or a supercapacitor pack, and is equipped with a battery management unit. The battery management unit is communicatively connected to the control unit and is used to feed back the energy storage state of charge to the control unit. The energy storage state of charge is used to participate in the calculation of the complete switching determination value K.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] (1) This invention sets up a switching decision mechanism with the complete switching judgment value K as the core in the control unit. The expected energy saving, bus stability improvement, rectifier unit output current adaptation improvement and temperature rise balance improvement brought by power supply path switching are taken as benefits, while the additional switching loss, contact wear cost, drive action energy consumption and frequent switching penalty are taken as costs. The ratio of benefits to costs is compared in the same dimension. The movable conductive bridge is driven to perform complete power supply path switching only when K is greater than or equal to the complete switching threshold K0 and the current power supply path continuous operation time is not less than the minimum dwell time t0. This suppresses the repeated switching and no-benefit switching near the threshold in the existing single threshold control method, so that the power supply path switching truly serves the energy efficiency optimization of the whole cabinet.

[0033] (2) By utilizing the switching action necessary for the power supply path switching component itself between mains rectified power supply and energy storage power supply, the movable conductive bridge can perform short-range relative sliding along the currently contacted fixed busbar while maintaining electrical connection with the currently contacted fixed busbar and without changing the power supply path. This achieves mechanical renewal of the contact interface without adding an independent cleaning mechanism or redundant power devices, breaks the oxide film and particle adhesion on the contact interface, reduces the rise in contact resistance during long-term operation, and thus suppresses contact temperature rise and conduction loss.

[0034] (3) This invention sets a low-amplitude refresh judgment value F and combines the degree of contact resistance degradation, the degree of contact temperature rise degradation and the amount of refresh suppression for comprehensive evaluation. This enables the control unit to drive the movable conductive bridge to perform a small-stroke low-amplitude refresh switch when the complete switching judgment value K does not meet the complete switching conditions but the contact state continues to degrade. The power supply path remains unchanged during the refresh process, thus solving the problem of contact interface aging and no maintenance when the power supply cabinet does not switch power supply paths for a long time. At the same time, it has almost no disturbance to the continuity of power supply.

[0035] (4) This invention introduces a frequent switching penalty in the complete switching decision, a refresh suppression in the low-amplitude refresh decision, and makes the energy storage state of charge participate in the calculation of the complete switching judgment value K. This not only constrains the frequency and cumulative travel of switching and refresh actions, avoiding mechanical wear and additional losses caused by excessive actions, but also improves the stability and reliability of the power cabinet in long-term operation.

[0036] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the 5G integrated smart power cabinet of the present invention;

[0038] Figure 2 This is a schematic diagram of the power supply path switching component of the present invention;

[0039] Figure 3 This is a schematic diagram showing the conductive state of the movable conductive bridge of the present invention at the first contact position and the second contact position.

[0040] Figure 4 This is a schematic diagram illustrating the action of the movable conductive bridge of the present invention performing low-amplitude refresh switching;

[0041] Figure 5 This is a schematic diagram showing the connection relationship between the control unit, the monitoring unit, and the power supply path switching component of the present invention;

[0042] Figure 6 This is a schematic diagram of the power supply path switching control process of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Cabinet; 10. Mains input unit; 20. Rectifier unit; 30. Energy storage unit; 40. DC power distribution unit; 50. Monitoring unit; 60. Control unit; 70. Power supply path switching component; 71. First fixed busbar; 72. Second fixed busbar; 73. Third fixed busbar; 74. Movable conductive bridge; 75. Guide seat; 751. Limiting part; 76. Drive component; 77. Position feedback component; 80. Input cable interface; 90. Output load interface. Detailed Implementation

[0045] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Example 1: See Figure 1This embodiment provides a 5G integrated smart power cabinet based on infrastructure energy-saving technology, including a cabinet 1. The cabinet 1 is equipped with a mains power input unit 10, a rectifier unit 20, an energy storage unit 30, a DC power distribution unit 40, a monitoring unit 50, a control unit 60, a power supply path switching component 70, an input cable interface 80, and an output load interface 90.

[0049] Cabinet 1 can be a prefabricated steel structure cabinet, suitable for infrastructure scenarios such as 5G base station equipment rooms, aggregation equipment rooms, or edge computing nodes. The AC power input unit 10 is used to connect to an external AC power source. The AC power input unit 10 can be equipped with surge protection devices, insulation detection devices, and an input circuit breaker to improve the safety of the AC input side. The rectifier unit 20 is electrically connected to the AC power input unit 10 and is used to convert AC power to DC power for supplying power to the DC side. The rectifier unit 20 may include one or more rectifier modules, the specific number of which can be configured according to the power cabinet capacity.

[0050] The energy storage unit 30 is used to replenish electrical energy to the DC side when there are mains power anomalies, load fluctuations, DC bus voltage drops, or when the rectifier unit is operating in an inefficient state. In this embodiment, the energy storage unit 30 uses a battery pack; in other embodiments, it can also use a supercapacitor pack, or a combination of a battery pack and a supercapacitor pack. The energy storage unit 30 is equipped with a battery management unit, which is communicatively connected to the control unit 60 and used to provide feedback on the energy storage charge status to the control unit 60. The DC power distribution unit 40 is used to output DC power to infrastructure loads such as 5G base station equipment, transmission equipment, and edge computing equipment.

[0051] The monitoring unit 50 is connected to the rectifier unit 20, the energy storage unit 30, the DC power distribution unit 40, and the power supply path switching component 70, respectively, and is used to collect load power, DC bus voltage, energy storage state of charge, rectifier unit output current, contact resistance, and contact temperature rise. The control unit 60 is communicatively connected to the monitoring unit 50 and electrically connected to the drive component 76 and the position feedback component 77 of the power supply path switching component 70, and is used to make switching decisions and execute control based on the data collected by the monitoring unit 50.

[0052] By integrating mains power input, rectification, energy storage, power distribution, monitoring, control and switching into a single cabinet, this embodiment makes the integrated smart power cabinet compact, facilitating network upgrades and batch deployments in space-constrained 5G infrastructure scenarios.

[0053] Example 2: See Figure 2 This embodiment further illustrates the structure of the power supply path switching component 70 based on Embodiment 1.

[0054] The power supply path switching component 70 includes a first fixed busbar 71, a second fixed busbar 72, a third fixed busbar 73, a movable conductive bridge 74, a guide seat 75, a drive component 76, and a position feedback component 77. The first fixed busbar 71 is electrically connected to the rectifier unit 20, the second fixed busbar 72 is electrically connected to the energy storage unit 30, and the third fixed busbar 73 is electrically connected to the DC power distribution unit 40. The third fixed busbar 73 serves as the output-side busbar, while the first fixed busbar 71 and the second fixed busbar 72 serve as the input-side busbars.

[0055] A movable conductive bridge 74 is disposed on a guide seat 75. The guide seat 75 extends along the moving direction of the movable conductive bridge 74 and is provided with a plurality of limiting parts 751, each limiting part 751 corresponding to a plurality of contact positions. The movable conductive bridge 74 is a conductive plate-shaped or conductive block-shaped structure. When it moves to a certain contact position, it electrically connects the corresponding input side busbar to the third fixed busbar 73, thereby conducting the corresponding power supply path.

[0056] The driving component 76 is connected to the movable conductive bridge 74 and is used to drive the movable conductive bridge 74 to move along the guide seat 75 between multiple contact positions. In this embodiment, the driving component 76 is an electric push rod, and the piston rod of the electric push rod is connected to the movable conductive bridge 74. The extension and retraction of the piston rod drives the movable conductive bridge 74 to move in a specific direction. In other embodiments, the driving component 76 can also be a linear module or a stepper motor drive mechanism, both of which can realize the positioning and movement of the movable conductive bridge 74. The movement mode of the power supply path switching component 70 does not constitute a limitation of the present invention; a simple electric push rod or linear module can meet the switching requirements.

[0057] A position feedback element 77 is disposed on the guide seat 75 or on the movement path of the movable conductive bridge 74, and is used to detect whether the movable conductive bridge 74 has reached the corresponding limit part 751. In this embodiment, the position feedback element 77 is a limit switch, which is triggered when the movable conductive bridge 74 reaches a certain limit part 751; in other embodiments, the position feedback element 77 may also be a Hall sensor or an encoder to detect the position information of the movable conductive bridge 74. The position feedback element 77 feeds back the detected position signal to the control unit 60, and the control unit 60 confirms whether the complete power supply path switching or low-amplitude refresh switching is completed based on the position signal, thereby forming a closed loop of switching action of perception, decision-making, execution, and feedback.

[0058] In practical applications, the specific arrangement of the power supply path switching component 70 is not limited to the structure shown in the figure. The positions of the first fixed busbar 71, the second fixed busbar 72, and the third fixed busbar 73, as well as the bridge structure of the movable conductive bridge 74, can be adjusted according to the actual structure.

[0059] Example 3: See Figure 3Based on Embodiment 2, this embodiment further illustrates the correspondence between multiple contact points and power supply paths, as well as the difference between complete power supply path switching and low-amplitude refresh switching.

[0060] like Figure 3 As shown, the plurality of contact positions include at least a first contact position and a second contact position; when the movable conductive bridge 74 is in the first contact position, the movable conductive bridge 74 electrically connects the first fixed busbar 71 and the third fixed busbar 73, and the rectifier unit 20 supplies power to the DC power distribution unit 40 through the first fixed busbar 71 and the third fixed busbar 73; when the movable conductive bridge 74 is in the second contact position, the movable conductive bridge 74 electrically connects the second fixed busbar 72 and the third fixed busbar 73, and the energy storage unit 30 supplies power to the DC power distribution unit 40 through the second fixed busbar 72 and the third fixed busbar 73.

[0061] A complete power supply path switching refers to the movement of the movable conductive bridge 74 between different contact positions, thereby changing the power supply path between the rectifier unit 20, the energy storage unit 30, and the DC power distribution unit 40. For example, the movable conductive bridge 74 moves from the first contact position to the second contact position, switching the power supply path from direct mains rectification to energy storage power supply. The movement distance for a complete power supply path switching is the distance between adjacent contact positions.

[0062] In one implementation, such as Figure 3 As shown in (a), the first fixed busbar 71, the second fixed busbar 72, and the third fixed busbar 73 are arranged horizontally on the same plane. The first fixed busbar 71 and the second fixed busbar 72 are parallel, and both are perpendicular to the third fixed busbar 73. The movable conductive bridge 74 is adapted to be a long strip structure and can move horizontally. When the movable conductive bridge 74 is in the first contact position, it conducts electricity between the first fixed busbar 71 and the third fixed busbar 73; when it is in the second contact position, it conducts electricity between the second fixed busbar 72 and the third fixed busbar 73.

[0063] In another implementation, such as Figure 3 As shown in (b), the first fixed busbar 71 and the second fixed busbar 72 are arranged horizontally up and down in the vertical direction, and the third fixed busbar 73 is arranged in the vertical direction. The movable conductive bridge 74 is adapted to an L-shaped structure and can move up and down in the vertical direction. When the movable conductive bridge 74 is in the first contact position, the first fixed busbar 71 and the third fixed busbar 73 are connected; when it is in the second contact position, the second fixed busbar 72 and the third fixed busbar 73 are connected. The conduction principle, switching logic and low-amplitude refresh mechanism of this embodiment are completely consistent with the aforementioned embodiment, only the spatial arrangement of the busbars and the direction of movement of the conductive bridge are different.

[0064] See Figure 4Taking the currently contacted fixed busbar as the first fixed busbar 71 as an example, the action of the movable conductive bridge performing low-amplitude refresh switching is explained. Figure 4 (a) Figure 4 (b) Figure 4 (c) Schematic diagrams of the low-amplitude refresh switching operation before refresh, during forward refresh, and during reset; the arrows in the diagram indicate the direction of movement of the movable conductive bridge 74. Low-amplitude refresh switching refers to the movable conductive bridge 74 performing a short-range relative sliding relative to the currently contacted fixed busbar while maintaining electrical connection with the fixed busbar and without changing the power supply path. The movement distance of low-amplitude refresh switching is less than the movement distance of a complete power supply path switch. Specifically, low-amplitude refresh switching includes a forward refresh segment and a reverse reset segment. The forward refresh segment causes the movable conductive bridge 74 to perform a short-range relative sliding along the currently contacted fixed busbar, causing relative misalignment between the contact interface of the movable conductive bridge 74 and the fixed busbar, thereby breaking the oxide film and particle adhesion on the contact interface and realizing contact interface renewal; the reverse reset segment causes the movable conductive bridge 74 to return to the contact position before low-amplitude refresh switching. Throughout the entire low-amplitude refresh switching process, the movable conductive bridge 74 always maintains electrical connection with the currently contacting fixed busbar, and the power supply path between the rectifier unit 20, the energy storage unit 30 and the DC power distribution unit 40 remains unchanged, so there is almost no disturbance to the power supply continuity.

[0065] Since the power supply path switching component 70 is itself an essential actuator between the mains power supply and the energy storage power supply in the power cabinet, this embodiment utilizes the action capability of the mechanism to realize the mechanical renewal of the contact interface. Without the need to add an independent cleaning mechanism or redundant power devices for contact maintenance, the rise in contact resistance during long-term operation can be significantly reduced, thereby suppressing contact temperature rise and conduction loss.

[0066] Example 4: See Figure 5 Based on the aforementioned embodiments, this embodiment further illustrates the process by which the control unit 60 calculates the complete switching determination value K and performs a complete power supply path switching accordingly.

[0067] The control unit 60 acquires parameters such as load power, DC bus voltage, energy storage state of charge, rectifier unit output current, contact resistance, and contact temperature rise through the monitoring unit 50 at a preset sampling period. The control unit 60 calculates the expected benefits of switching between the current power supply path and each candidate target power supply path. Compared with the expected cost And calculate the complete switching decision value K according to the following formula:

[0068] (1);

[0069] Among them, expected returns From the expected energy saving Busbar stability improvement The weighted average of the improvement in rectifier unit output current adaptation and the improvement in temperature rise balance is obtained as follows:

[0070] (4);

[0071] Expected energy savings Busbar stability improvement Improvement in the standard deviation of module output current and the improvement in temperature rise balance They are respectively:

[0072] (5);

[0073] (6);

[0074] (7);

[0075] (8);

[0076] in, , t1 and t2 represent the predicted input power of the current and target power supply paths at time τ, respectively; t1 and t2 represent the sampling start and end times, respectively.

[0077] , These are the predicted DC bus voltages of the current and target power supply paths at time τ, respectively.

[0078] This is the DC bus reference voltage; This represents the standard deviation of the output current;

[0079] , These represent the maximum temperature difference between the current and target power supply paths, respectively.

[0080] Expected cost Additional losses due to switching Contact wear cost Energy consumption of driving action We obtain the following by weighting the penalty amount for frequent switching:

[0081] (9);

[0082] To unify the units of measurement, switch the additional losses. Contact wear cost Energy consumption of driving action All values ​​are converted to equivalent energy consumption before being included in the weighted calculation. Frequent switching of penalty coefficients... Calculate using the following formula:

[0083] (2)

[0084] in, This represents the number of complete power supply path switching operations performed within a preset time window. This represents the maximum number of complete power supply path switching allowed within a preset time window. To preset the minimum switching interval, The time interval since the last complete power supply path switch; the frequent switching penalty is used to suppress repeated triggering of complete power supply path switches near the threshold.

[0085] When the complete handover determination value K is greater than or equal to the preset complete handover threshold Furthermore, the continuous operating time of the current power supply path is not less than the preset minimum dwell time. When the control unit 60 determines that the complete switching conditions are met, it controls the drive unit 76 to move the movable conductive bridge 74 to the target contact position, performs a complete power supply path switching, and confirms the switching is complete based on the feedback signal from the position feedback unit 77.

[0086] For example, when 5G equipment experiences a sudden high load and the DC bus voltage deviation increases, the expected energy saving Es and the bus stability improvement Eu when switching to the energy storage power supply path are relatively large, making... Increase, K is greater than The control unit 60 moves the movable conductive bridge 74 to the second contact position, and the energy storage unit 30 supplies power to the DC power distribution unit 40, thereby reducing the impact of mains power peaks and smoothing DC bus fluctuations, so that the energy storage unit 30 is upgraded from a passive backup component to an energy efficiency collaborative component that participates in daily energy allocation.

[0087] Example 5: See Figure 6 Based on the aforementioned embodiments, this embodiment further explains the process by which the control unit 60 calculates the low-amplitude refresh determination value F and performs low-amplitude refresh switching accordingly, as well as the overall switching decision process.

[0088] When the complete handover determination value K calculated by the control unit 60 is less than the preset complete handover threshold K0, that is, the complete handover condition is not currently met, the control unit 60 further calculates the low-amplitude refresh determination value F:

[0089] (3)

[0090] Among them, the degree of contact resistance degradation Degree of degradation due to contact temperature rise and refresh suppression amount They are respectively:

[0091] (10);

[0092] (11);

[0093] (12);

[0094] In the formula, The current contact resistance is detected by monitoring unit 50. To calibrate the contact resistance; For the current contact temperature rise, To calibrate the contact temperature rise; This represents the number of low-amplitude refresh switches that have been performed within the preset time window. This represents the maximum number of low-amplitude refresh switching cycles allowed within a preset time window. To accumulate low-volume trip updates, This is a preset setting that allows for a low cumulative refresh rate. , The adjustment coefficient is t, where t represents the current time in the above formula. From the formula, it can be seen that the greater the deviation of the current contact resistance and contact temperature rise from the calibrated values, and the faster the rate of change, the greater the degree of contact resistance degradation. and the degree of degradation due to contact temperature rise The larger the value, the larger F becomes; while the more low-amplitude refreshes within the preset time window and the greater the cumulative low-amplitude refresh journey, the greater the refresh suppression amount. The larger the value, the smaller the value of F, thus suppressing excessively frequent low-amplitude refresh switching.

[0095] When the low-amplitude refresh judgment value F is greater than or equal to the preset refresh threshold And the complete handover determination value K is less than the preset complete handover threshold. When the control unit 60 determines that the low-amplitude refresh condition is met, it controls the drive unit 76 to drive the movable conductive bridge 74 to perform a short-range relative sliding along the currently contacted fixed busbar and then reset it, performing a low-amplitude refresh switch to update the contact interface.

[0096] See Figure 6 The overall switching decision process of the control unit 60 is as follows: the control unit 60 collects monitoring parameters according to a preset sampling period, calculates the complete switching judgment value K, and determines whether K is greater than or equal to the preset complete switching threshold. And whether the current power supply path's continuous operating time is not less than the preset minimum dwell time. If yes, then the control driver 76 drives the movable conductive bridge 74 to perform a complete power supply path switch; if no, then continue to calculate the low-amplitude refresh judgment value F, and determine whether F is greater than or equal to the preset refresh threshold. If yes, the control drive 76 drives the movable conductive bridge 74 to perform a low-amplitude refresh switch; if no, the current power supply path remains unchanged. The control unit 60 repeats the above process in each sampling cycle, thereby ensuring power supply reliability while realizing on-demand switching of the power supply path and on-demand maintenance of the contact interface.

[0097] In one alternative implementation, the aforementioned weighting coefficients ~ , ~ , ~ and adjustment coefficient , The value can be calibrated according to the actual capacity and operating environment of the power cabinet, and its range can be set from 0 to 10; complete switching threshold Refresh threshold Minimum stay time Preset time window, preset minimum switching interval And preset allowance for cumulative low-level trip refreshes All can be calibrated according to the on-site working conditions. For example, one can take... , , , , , , , , , , Complete switching threshold Set the value to 1.2 and refresh the threshold. Take 0.3, minimum dwell time Set 300 seconds, preset time window is 24 hours, preset minimum switching interval Set a time limit of 60 seconds, with a preset allowance for cumulative low-amplitude refreshes. Take 5 mm. Those skilled in the art can obtain other equivalent value combinations based on the above calibration method. All equivalent changes made using the determination method of this invention should fall within the protection scope of this invention.

[0098] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology, characterized in that: Includes a cabinet (1), which is equipped with a mains power input unit (10), a rectifier unit (20), an energy storage unit (30), a DC power distribution unit (40), a monitoring unit (50), a control unit (60), and a power supply path switching component (70). The power supply path switching component (70) includes a first fixed busbar (71), a second fixed busbar (72), a third fixed busbar (73), a movable conductive bridge (74), a guide seat (75), a drive component (76), and a position feedback component (77); the first fixed busbar (71) is electrically connected to the rectifier unit (20), the second fixed busbar (72) is electrically connected to the energy storage unit (30), and the third fixed busbar (73) is electrically connected to the DC power distribution unit (40); The movable conductive bridge (74) is disposed on the guide seat (75). The guide seat (75) is provided with multiple contact positions and limiting parts (751) corresponding to the multiple contact positions. The driving member (76) is used to drive the movable conductive bridge (74) to move along the guide seat (75) between the multiple contact positions, so as to switch the power supply path between mains rectified power supply and energy storage power supply. The monitoring unit (50) is used to collect load power, DC bus voltage, energy storage state of charge, rectifier unit output current, contact resistance and contact temperature rise; The control unit (60) is used to calculate the complete switching judgment value K and the low-amplitude refresh judgment value F based on the data collected by the monitoring unit (50), and control the driving unit (76) to drive the movable conductive bridge (74) to perform complete power supply path switching or low-amplitude refresh switching based on the complete switching judgment value K and the low-amplitude refresh judgment value F. The complete power supply path is switched to a movable conductive bridge (74) that moves between different contact positions to change the power supply path; the movement distance of the low-amplitude refresh switch is less than the movement distance of the complete power supply path switch, and the movable conductive bridge (74) forms a short-range relative slip with the currently contacted fixed busbar while maintaining electrical connection with the currently contacted fixed busbar and without changing the power supply path, so as to update the contact interface and reduce the contact resistance; The formula for calculating the complete switching determination value K is: （1）； in, The expected benefits of power supply path switching are obtained by weighting the expected energy savings, bus stability improvement, rectifier unit output current adaptation improvement, and temperature rise improvement. The expected cost of power supply path switching is obtained by weighting switching additional losses, contact wear costs, drive energy consumption, and frequent switching penalties. When the complete handover determination value K is greater than or equal to the preset complete handover threshold And the duration of the current power supply path is not less than the minimum dwell time. At that time, the control unit (60) controls the drive unit (76) to drive the movable conductive bridge (74) to perform a complete power supply path switching.

2. The 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 1, characterized in that: The frequent switching penalty amount is determined by the frequent switching penalty coefficient. The frequent switching penalty coefficient is determined by multiplying the reference energy consumption for a single switch by the reference energy consumption. Calculate using the following formula: （2）； in, This represents the number of complete power supply path switching operations performed within a preset time window. This represents the maximum number of complete power supply path switching allowed within a preset time window. To preset the minimum switching interval, The time interval since the last complete power supply path switch; the frequent switching penalty is used to suppress repeated triggering of complete power supply path switches near the threshold.

3. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 1, characterized in that: The low-amplitude refresh determination value F is calculated according to the following formula: （3）； in, The degree of contact resistance degradation is determined by the offset of the current contact resistance relative to the rated contact resistance and the rate of change of the contact resistance. The degree of contact temperature rise degradation is determined by the deviation of the current contact temperature rise from the calibrated contact temperature rise and the rate of change of the contact temperature rise; The amount of refresh suppression is determined by the number of low-amplitude refresh switching operations and the cumulative low-amplitude refresh travel within the preset time window; , , These are the corresponding weighting coefficients; When F is greater than or equal to the preset refresh threshold And the complete handover determination value K is less than the preset complete handover threshold. At that time, the control unit (60) controls the drive unit (76) to drive the movable conductive bridge (74) to perform low-amplitude refresh switching.

4. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 3, characterized in that: The low-amplitude refresh switching includes a forward refresh segment and a reverse reset segment. The forward refresh segment causes the movable conductive bridge (74) to make a short-range relative slip along the currently contacted fixed busbar. The reverse reset segment causes the movable conductive bridge (74) to return to the contact position before the low-amplitude refresh switching. During the low-amplitude refresh switching process, the currently connected power supply path remains unchanged.

5. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 1, characterized in that: The plurality of contact positions includes at least a first contact position and a second contact position; When the movable conductive bridge (74) is in the first contact position, the rectifier unit (20) supplies power to the DC power distribution unit (40) through the first fixed busbar (71) and the third fixed busbar (73); When the movable conductive bridge (74) is in the second contact position, the energy storage unit (30) supplies power to the DC power distribution unit (40) via the second fixed busbar (72) and the third fixed busbar (73).

6. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 1, characterized in that: The position feedback element (77) is any one of a limit switch, a Hall sensor or an encoder. The position feedback element (77) is used to detect whether the movable conductive bridge (74) has reached the corresponding limit part (751) and to feed back the position signal to the control unit (60). The control unit (60) confirms whether the complete power supply path switching or low-amplitude refresh switching is completed based on the position signal, so as to form a closed loop of switching action of perception, decision-making, execution and feedback.

7. A 5G integrated smart power supply cabinet based on infrastructure energy-saving technology according to claim 1, characterized in that: The driving component (76) is any one of an electric push rod, a linear module, or a stepper motor; the energy storage unit (30) is at least one of a battery pack or a supercapacitor pack, and is equipped with a battery management unit. The battery management unit is communicatively connected to the control unit (60) and is used to feed back the energy storage charge state to the control unit (60). The energy storage charge state is used to participate in the calculation of the complete switching determination value K.

Images