Multi-parallel-connection power supply system and starting control method

Abstract

The invention is suitable for the field of circuits, and provides a multi-parallel-connection power supply system and a start control method.The multi-parallel-connection power supply system comprises a start signal generation module and a plurality of power supply modules connected with the start signal generation module; each power supply module comprises a synchronous starting control unit and an AND gate connected with the synchronous starting control unit, the synchronous starting control unit comprises a synchronous signal sending end used for sending a synchronous signal and a synchronous signal receiving end used for receiving the synchronous signal, and the AND gates of the power supply modules are sequentially connected. In the plurality of AND gates which are connected in sequence, the first input ends of all AND gates are connected with the synchronous signal sending end of the synchronous starting control unit in the same power supply module, the second input end of the first AND gate is set to be high level, and the second input ends of all subsequent AND gates are connected with the output end of the previous AND gate. And the output end of the last AND gate is connected with the synchronous signal receiving ends of all the synchronous starting control units. By adopting the technical scheme of the embodiment of the invention, the starting reliability and the overall availability of the multi-parallel power supply system can be improved.

Description

Technical Field

[0001] The present invention belongs to the field of multi-parallel power supply systems, and in particular relates to a multi-parallel power supply system and a startup control method. Background Art

[0002] Multi-parallel power supply systems are widely used in data centers, telecommunication base stations, uninterruptible power supply (UPS) systems and other power systems that require high reliability and high availability.

[0003] In a multi-parallel power supply system, synchronous startup is usually required to ensure that each power module can work in a coordinated manner. When multiple power modules are running in parallel, the reliability and stability of the system are very important. Traditional synchronous startup logic usually relies on all modules to start successfully. If any module fails during the startup process, the entire system may stop starting, causing the system to fail to work properly.

[0004] In a multi-parallel power supply system, the transmission of synchronization signals needs to be implemented through hardware circuits. These hardware circuits may have problems such as poor contact and signal attenuation during long-term use, resulting in unreliable synchronization signal transmission. Unreliable synchronization signal transmission will cause inconsistent module startup and affect the overall startup effect of the system. To prevent unreliable synchronization signal transmission, hardware connections need to be frequently checked and maintained, which increases the maintenance cost and complexity of the system. Summary of the invention

[0005] The object of the present invention is to provide a multi-parallel power supply system and a startup control method with simple system maintenance and low cost.

[0006] The present invention is implemented as follows: a multi-parallel power supply system includes a start signal generating module and a plurality of power supply modules respectively connected to the start signal generating module, the power supply module includes a synchronous start control unit and an AND gate connected to the synchronous start control unit, the synchronous start control unit includes a synchronous signal sending end for sending a synchronous signal and a synchronous signal receiving end for receiving a synchronous signal, the AND gates of the plurality of power supply modules are connected in sequence, among the plurality of AND gates connected in sequence, the first input ends of all the AND gates are connected to the synchronous signal sending end of the synchronous start control unit in the same power supply module, the second input end of the first AND gate is set to a high level, the second input ends of all subsequent AND gates are connected to the output end of the previous AND gate, the output end of the last AND gate is connected to the synchronous signal receiving end of all the synchronous start control units, the start signal generating module is used to send a start signal to the plurality of power supply modules, and the power supply modules are started by the synchronous start control unit after receiving the start signal.

[0007] Furthermore, the power module further includes a self-checking unit, and the self-checking unit is used to perform a self-check on the power module in real time to determine whether a fault occurs in the power module.

[0008] Further, the process in which the power module is started by the synchronous start control unit after receiving the start signal includes:

[0009] After receiving the start signal from the start signal generating module, the power module first determines whether it has a fault. If not, the internal synchronous start control unit sends a synchronization signal through the synchronization signal sending end. If there is a fault, the power module shuts down and alarms without sending a synchronization signal.

[0010] The synchronous start control unit waits for the synchronization signal receiving end to receive the synchronization signal within a time window set after sending the synchronization signal. If the synchronization signal receiving end receives the synchronization signal within the time window, it determines whether the power module has a fault. If there is no fault, the power module is immediately controlled to start. If there is a fault, it shuts down and alarms without sending a synchronization signal.

[0011] Furthermore, if the synchronization signal receiving end does not receive the synchronization signal within the time window, it is determined whether the power module has a fault when the set time of the time window is reached. If there is no fault, the power module is immediately controlled to start; if there is a fault, it is shut down and an alarm is issued without sending a synchronization signal.

[0012] Furthermore, the set time window is 100 nm.

[0013] Furthermore, the synchronization signal is at a high level.

[0014] Furthermore, the present invention also provides a startup control method for the above-mentioned multi-parallel power supply system, which comprises:

[0015] After receiving the start signal from the start signal generating module, the power module first determines whether it has a fault. If not, the internal synchronous start control unit sends a synchronization signal through the synchronization signal sending end. If there is a fault, the power module shuts down and alarms without sending a synchronization signal.

[0016] The synchronous start control unit waits for the synchronization signal receiving end to receive the synchronization signal within a time window set after sending the synchronization signal. If the synchronization signal receiving end receives the synchronization signal within the time window, it determines whether the power module has a fault. If there is no fault, the power module is immediately controlled to start. If there is a fault, it shuts down and alarms without sending a synchronization signal.

[0017] Furthermore, if the synchronization signal receiving end does not receive the synchronization signal within the time window, it is determined whether the power module has a fault when the set time of the time window is reached. If there is no fault, the power module is immediately controlled to start; if there is a fault, it is shut down and an alarm is issued without sending a synchronization signal.

[0018] Compared with the prior art, the multi-parallel power supply system and startup control method of the present invention respectively sets an AND gate in each power supply module and specifically connects the AND gates, so that a logical AND operation can be performed on the time synchronization signals emitted by all power supply modules, and the received operation results are sent to each power supply module as a synchronization signal, so that the synchronization of multiple power supply modules can be directly achieved without using a bus, thereby reducing the influence of signal delay in the bus; in addition, synchronization judgment is performed based on whether a synchronization signal is received within a set time window, thereby minimizing the influence of signal delay caused by contact and other problems in the transmission of the synchronization signal, and significantly improving the startup reliability of the multi-parallel power supply system; finally, if a power supply module does not receive a synchronization signal at the synchronization signal receiving end within the time window, but there is no fault in itself, the power supply module is immediately controlled to start, thereby improving the overall availability of the multi-parallel power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a multi-parallel power supply system according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of connecting multiple power modules of a multi-parallel power supply system according to an embodiment of the present invention.

[0021] Figure 3 It is a start-up control flow chart of a multi-parallel power supply system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0024] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] See also Figure 1 The embodiment of the present invention provides a multi-parallel power supply system, which includes a start signal generating module 1 and a plurality of power supply modules 2 respectively connected to the start signal generating module 1. The start signal generating module 1 is used to send a power start signal to the plurality of power supply modules 2, and the power supply modules 2 start to start after receiving the start signal. The start signal generating module 1 can be a button or a switch, and the present invention does not limit this.

[0026] The power module 2 includes a synchronous start control unit 21, an AND gate 22 and a self-test unit 23. Figure 2 As shown, the synchronous start control unit 21 includes a synchronous signal sending terminal 211 for sending a synchronous signal and a synchronous signal receiving terminal 212 for receiving a synchronous signal. The synchronous signal is at a high level. The AND gates 22 of the plurality of power modules 2 are connected in sequence. Among the plurality of AND gates 22 connected in sequence, the first input terminals of all the AND gates 22 are connected to the synchronous signal sending terminal 211 of the synchronous start control unit 21 in the same power module 2, the second input terminal of the first AND gate is set to a high level, and the second input terminals of all subsequent AND gates 22 are connected to the output terminal of the previous AND gate, and the output terminal of the last AND gate is connected to the synchronous signal receiving terminals 212 of all the synchronous start control units 21. Through the above connection mode, the time synchronization signals sent by the synchronous start control units 21 of all the power modules 2 are logically ANDed, and the operation results are sent to the synchronous signal receiving terminals of the synchronous start control units 21 of each power module 2. When all the synchronization signal sending ends 211 send out a high-level synchronization signal, and the final calculation result is a high level, that is, when the synchronization start control unit 21 of each power module 2 receives a high-level synchronization signal, it indicates that all the power modules 2 are synchronized, thereby directly realizing the synchronization of multiple power modules 2 without using a bus.

[0027] The self-checking unit 23 is used to perform self-checking on the power module 2 in real time to determine whether the power module 2 has a fault. It should be noted that in a multi-parallel system, each power module 2 needs to perform self-checking during standby, startup and after startup to determine whether it has a fault. If there is a fault, it will shut down and send out an alarm signal, which can be sent out by an indicator light or a buzzer.

[0028] Combine the following Figure 3 The process of starting the power module 2 through the synchronous start control unit 21 after receiving the start signal is described in detail.

[0029] After receiving the start signal from the start signal generating module 1, the synchronous start control unit 22 first determines whether the power supply module 2 has a fault. If not, it sends a synchronization signal through the synchronization signal sending terminal 211. If there is a fault, it shuts down and alarms without sending a synchronization signal.

[0030] The synchronous start control unit 22 waits for the synchronization signal receiving end to receive the synchronization signal within the time window set after sending the synchronization signal. If the synchronization signal receiving end 212 receives the synchronization signal within the time window, it determines whether the power supply module 2 has a fault. If there is no fault, the power supply module 2 is immediately controlled to start. If there is a fault, it shuts down and alarms, and stops sending the synchronization signal.

[0031] In the embodiment of the present invention, the set time window can be set according to actual needs, preferably, it can be set to 100nm. By setting the time window, the influence of signal delay caused by contact and other problems in the transmission of synchronization signals can be reduced, and the startup reliability of the multi-parallel power supply system can be improved.

[0032] Furthermore, if the synchronization signal receiving terminal 212 does not receive the synchronization signal within the time window, it means that there is a fault in the power module 2. In order to make the multi-parallel power supply system available, the processing method of the present invention is: when the set time of the time window is reached, it is determined whether the power module 2 is faulty, if there is no fault, the power module 2 is immediately controlled to start, and if there is a fault, it is shut down and an alarm is issued. Through this processing method, even if there is a faulty power module 2 and the multi-parallel power supply system cannot be started synchronously, a single power module 2 without a fault can be started after the time of the time window is reached, and the startup of other power modules 2 can be realized relatively synchronously, ensuring the overall availability of the multi-parallel power supply system.

[0033] In summary, the multi-parallel power supply system and startup control method of the present invention are adopted, by respectively setting an AND gate in each power supply module and making specific connections to the AND gates, so that a logical AND operation can be performed on the time synchronization signals emitted by all power supply modules, and the received operation results are sent to each power supply module as a synchronization signal, so that the synchronization of multiple power supply modules can be directly achieved without using a bus, thereby reducing the influence of signal delay in the bus; in addition, a synchronization judgment is made based on whether a synchronization signal is received within a set time window, thereby reducing the influence of signal delay caused by contact and other problems in the transmission of the synchronization signal, and significantly improving the startup reliability of the multi-parallel power supply system; finally, if a power supply module does not receive a synchronization signal at the synchronization signal receiving end within the time window, but there is no fault in itself, the power supply module is immediately controlled to start, thereby improving the overall availability of the multi-parallel power supply system.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-parallel power supply system, characterized in that: It comprises a start signal generating module and a plurality of power supply modules respectively connected to the start signal generating module, the power supply module comprises a synchronous start control unit and an AND gate connected to the synchronous start control unit, the synchronous start control unit comprises a synchronous signal sending end for sending a synchronous signal and a synchronous signal receiving end for receiving a synchronous signal, the AND gates of the plurality of power supply modules are connected in sequence, among the plurality of AND gates connected in sequence, the first input ends of all the AND gates are connected to the synchronous signal sending end of the synchronous start control unit in the same power supply module, the second input end of the first AND gate is set to a high level, the second input ends of all subsequent AND gates are connected to the output end of the previous AND gate, the output end of the last AND gate is connected to the synchronous signal receiving ends of all the synchronous start control units, the start signal generating module is used to send a start signal to the plurality of power supply modules, and the power supply modules are started by the synchronous start control unit after receiving the start signal.

2. The multi-parallel power supply system according to claim 1, characterized in that: The power module further comprises a self-checking unit, which is used to perform a self-check on the power module in real time to determine whether a fault occurs in the power module.

3. The multi-parallel power supply system according to claim 2, characterized in that: The process in which the power module is started by the synchronous start control unit after receiving the start signal includes: After receiving the start signal from the start signal generating module, the power module first determines whether it has a fault. If not, the internal synchronous start control unit sends a synchronization signal through the synchronization signal sending end. If there is a fault, the power module shuts down and alarms without sending a synchronization signal. The synchronous start control unit waits for the synchronization signal receiving end to receive the synchronization signal within a time window set after sending the synchronization signal. If the synchronization signal receiving end receives the synchronization signal within the time window, it determines whether the power module has a fault. If there is no fault, the power module is immediately controlled to start. If there is a fault, it shuts down and alarms without sending a synchronization signal.

4. The multi-parallel power supply system according to claim 3, characterized in that: If the synchronization signal receiving end does not receive the synchronization signal within the time window, it is determined whether the power module has a fault when the set time of the time window is reached. If there is no fault, the power module is immediately controlled to start; if there is a fault, it is shut down and an alarm is issued without sending a synchronization signal.

5. The multi-parallel power supply system according to claim 3, characterized in that: The set time window is 100 nm.

6. The multi-parallel power supply system according to claim 3, characterized in that: The synchronization signal is at a high level.

7. A startup control method for a multi-parallel power supply system as claimed in claim 1, characterized in that: include: After receiving the start signal from the start signal generating module, the power module first determines whether it has a fault. If not, the internal synchronous start control unit sends a synchronization signal through the synchronization signal sending end. If there is a fault, the power module shuts down and alarms without sending a synchronization signal. The synchronous start control unit waits for the synchronization signal receiving end to receive the synchronization signal within a time window set after sending the synchronization signal. If the synchronization signal receiving end receives the synchronization signal within the time window, it determines whether the power module has a fault. If there is no fault, the power module is immediately controlled to start. If there is a fault, it shuts down and alarms without sending a synchronization signal.

8. The startup control method of a multi-parallel power supply system according to claim 7, characterized in that: If the synchronization signal receiving end does not receive the synchronization signal within the time window, it is determined whether the power module has a fault when the set time of the time window is reached. If there is no fault, the power module is immediately controlled to start; if there is a fault, it is shut down and an alarm is issued without sending a synchronization signal.

9. The startup control method of a multi-parallel power supply system according to claim 7, characterized in that: The set time window is 100 nm.

10. The startup control method of a multi-parallel power supply system according to claim 7, characterized in that: The synchronization signal is at a high level.

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