Overload protection strategy of integrated power supply

Abstract

The invention relates to an overload protection strategy of an integrated power supply, which can realize dynamic overload protection of a single port and a whole machine of the integrated power supply, and compared with a traditional protection mode, the overload protection strategy has the advantages that the influence on power supply of a load end when the whole machine is overloaded is effectively reduced, and the reliability of power supply to the load is improved. The method comprises the following steps: 1) collecting and calculating the power of the whole machine and each path of output of the integrated power supply; 2) the power supply priority of each path of output can be set; 3) each path of output can be independently subjected to overload protection; (4) when the whole machine is overloaded, the output is cut off according to the power supply priority from low to high; and (5) after the low-power-supply-priority port is disconnected by complete machine overload protection, conditional attempt to restore power supply can be carried out. The problems that some traditional overload protection modes enable the application condition of the integrated power supply to be limited, and the protection modes have too large influence on load power supply are solved.

Description

Technical Field

[0001] The present invention mainly relates to a protection strategy for multi-channel outputs of an integrated power supply under overload conditions, in particular to a protection strategy for minimizing the impact on power supply of each channel load under overload conditions of the entire machine. Background Art

[0002] In order to improve the load-carrying capacity of each output of the integrated power supply, the sum of the maximum power values ​​of each output is often greater than the full-load power value of the whole machine; and the existing integrated power supply output overload protection mostly adopts the method of collecting the output current value and comparing it with the protection value. When the collected current value is greater than the protection value, the output is disconnected. This method can play a good protective role for the output overload of a single port, but it is not very suitable for the case where the integrated power supply is overloaded but the single port is not overloaded.

[0003] Later, when the integrated power supply was in the situation that the whole machine was overloaded but the single port was not overloaded, a protection strategy was adopted to disconnect according to the physical serial number of the output port, and the ports were disconnected one by one according to their physical positions until the whole machine was not overloaded, and then the action stopped. This protection strategy can improve the power supply impact of the whole machine overload protection on the load of each port, but it has restrictive requirements on the applicability of each port; there may be unreasonable distribution of port priority and load power supply during installation and deployment, and the versatility of the equipment is not strong, and it cannot meet different deployment and use environments. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a new integrated power supply overload protection strategy, which will improve the power supply reliability of the integrated power supply to various loads, reduce the impact of the overload protection of the integrated power supply on the power supply of each port load, and at the same time there is no need to limit the load distribution of each port.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] Each output port of the integrated power supply is programmable, and the power supply priority is arranged from high to low according to the importance of each load.

[0007] After setting, turn on each output of the integrated power supply to supply power and load in turn.

[0008] Collect parameters and calculate power for the overall output of the integrated power supply and the output of each port.

[0009] When an output port is detected to be overloaded, the output of the corresponding port is disconnected for overload protection.

[0010] When it is detected that the integrated power supply is overloaded but none of the output ports are overloaded, protective disconnection is performed from low to high according to the power supply priority of each port until the entire machine is no longer overloaded after a certain port is disconnected, and then the action stops.

[0011] When the integrated power supply has whole-machine overload protection, when it is detected that the output power of a high-priority power supply port is reduced (part of the load is turned off) or the output is manually disconnected, the power supply port that is disconnected by protection will try to reclose the output in order of power supply priority from high to low.

[0012] When the power supply port that has been disconnected by the whole machine overload protection is closed again, it will also be included in the scope of the single-port overload protection and the whole machine overload protection of the integrated power supply.

[0013] Compared with the existing methods, the beneficial effects of the present invention are:

[0014] The present invention proposes an optimized overload protection strategy for an integrated power supply, which is applicable to output overload protection of the entire integrated power supply and a single port, thereby improving the power supply reliability and deployment applicability of the integrated power supply.

[0015] The feasibility is mainly reflected in that the overload protection strategy of the integrated power supply using the present invention can be programmable according to the on-site deployment environment restrictions and the power supply priority classification of the load, especially when the integrated power supply needs to change the use environment, the power supply priority of each port can be easily reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of the protection strategy involved in the present invention. DETAILED DESCRIPTION

[0017] The steps for executing the overload protection strategy of the integrated power supply in this embodiment are as follows:

[0018] 1. Turn on the integrated power supply, which completes the self-test and is in standby mode;

[0019] 2. Set the corresponding power supply priority 1 to n according to the load importance of each output port XS01 to X0n of the integrated power supply;

[0020] 3. After setting, save the priority, and then click the one-key full-on button of the integrated power supply. The integrated power supply will close the output ports in sequence according to the priority level;

[0021] 4. Output of the integrated power supply I all And each output I 0m Perform collection and calculation to obtain the power value P of the whole machine and each output all and P 0m ;

[0022] 5. Set the output power value P of each port 0m The port protection value P is set Pom Make comparisons;

[0023] 6. When the output power value of the port is P 0m Greater than the protection value P Pom When the output is disconnected for protection;

[0024] 7. When the output of each port is not overloaded but the whole machine is overloaded (P all >P Pall ), the output is disconnected in sequence from level n according to the power supply priority until the whole machine is not overloaded;

[0025] 8. After the whole machine is overload protected, when it is detected that the output with priority 1 is manually turned off or part of the load is turned off to reduce the output power, the outputs with priority 2 to n are checked in turn to see if there are any outputs turned off due to the whole machine overload protection; if there are, the power supply is tried to be restored in the order of power supply priority 2 to n;

[0026] 9. If the output with power supply priority n-2 is manually shut down during the period of whole machine overload protection disconnection, it is not included in the sequence of attempting to restore power supply;

[0027] 10. The output of the restored power supply will be re-included in the range of the whole machine overload protection and single port overload protection, and the power supply priority remains unchanged.

[0028] Finally, it is to be noted that the above embodiments are only used to illustrate the technical application of the present invention rather than to limit the present invention. Although the present invention has been described in detail through the above embodiments, various changes can be made in form and details in this field and related fields without departing from the scope defined by the claims of the present invention.

Claims

1. An overload protection strategy for a comprehensive power supply, the characteristics of which include: S1. The integrated power supply has multiple outputs, and the power supply priority can be set for each output; S2, fully open the output of the integrated power supply, and power on in sequence according to the power supply priority; S3, the integrated power supply and each output port are all subject to output parameter collection and power calculation; S4. Each output port of the integrated power supply can be independently protected from overload; S5: When the integrated power supply is overloaded but none of the output ports are overloaded, protective disconnection is performed from low to high according to the power supply priority of each port until the entire machine is not overloaded; S6. When it is detected that the output power of a high-priority power supply port of the integrated power supply is reduced (part of the load is turned off) or the output is manually disconnected, the low-priority power supply port that is disconnected by protection will try to close the output again according to the power supply priority from high to low; S7. After the power supply port disconnected by the whole machine overload protection is reclosed, it will also be included in the scope of single-port overload protection and the whole machine overload protection of the integrated power supply.

2. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: The integrated power supply in S1 has multiple output ports, and each output port can be arranged with power supply priority.

3. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: In S2, each output of the integrated power supply needs to be closed in sequence according to the power supply priority.

4. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: In S3, the output power of the integrated power supply and each output can be collected and calculated.

5. The overload protection strategy of a comprehensive power supply according to claim 1, characterized in that: In S4, each output port of the integrated power supply can be controlled for overload protection.

6. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: When the integrated power supply is overloaded in S5, the output power supply port is disconnected protectively according to the power supply priority from low to high.

7. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: After the low power supply priority port of the integrated power supply in S6 is disconnected by the whole machine overload protection, a conditional attempt can be made to restore power supply.

8. The overload protection strategy of an integrated power supply according to claim 1, characterized in that: In S7, even if the integrated power supply attempts to restore power to the port, the port will still enter overload protection for the single port and the entire device.

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