Parallel equipment signal synchronization adjusting method and system

Abstract

The invention provides a parallel equipment signal synchronous adjustment method and system in the technical field of charging equipment synchronous control, and the method comprises the steps: S1, selecting one from parallel charging equipment as master equipment, and enabling the rest to serve as slave equipment; s2, each slave device sets a minimum adjustment time Tsys, obtains a synchronization period Ttb of the master device, and calculates the number N of system clocks based on the minimum adjustment time Tsys and the synchronization period Ttb; step S3, the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects a time difference Terror between a rising edge of the synchronization signal and a system 0 moment of a local machine; and S4, each slave device gradually changes the minimum adjustment time Tsys according to the gradient of Terror / N in each synchronization period Ttb, so that the rising edge of the synchronization signal is infinitely close to the system 0 moment of the local machine, and signal synchronization of each parallel charging device is completed. The method has the advantage that the signal synchronization precision of the parallel charging equipment is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of synchronous control of charging equipment, and in particular to a method and system for synchronously regulating signals of parallel equipment. Background Art

[0002] With the advancement of new energy technology and the continuous improvement of charging facilities, the demand for high-power charging equipment is also increasing. However, it is obviously unrealistic to blindly develop a single high-power charging device. Therefore, using medium-power charging equipment in parallel is a more appropriate solution.

[0003] When charging devices are used in parallel, there will be a parallel synchronization signal between the charging devices, and there will be a phase difference between the synchronization signals. Sometimes two or more charging devices need to be used in parallel. If there is a large phase difference, the charging devices will start in different orders, and there will be output inconsistency. This may cause internal circulation and even output overcurrent protection, thus creating a need for phase difference adjustment.

[0004] However, the existing phase difference adjustment method has low accuracy and can no longer meet the current actual use needs. Therefore, how to provide a parallel device signal synchronization adjustment method and system to improve the signal synchronization accuracy of parallel charging devices has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and system for synchronously adjusting signals of parallel devices, so as to improve the synchronization accuracy of signals of parallel charging devices.

[0006] In a first aspect, the present invention provides a method for synchronously adjusting signals of parallel devices, comprising the following steps:

[0007] Step S1, selecting one of the charging devices connected in parallel as the master device and the others as slave devices;

[0008] Step S2: Each slave device sets a minimum adjustment time Tsys, obtains the synchronization period Ttb of the master device, and calculates the number of system clocks N based on the minimum adjustment time Tsys and the synchronization period Ttb;

[0009] Step S3, the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device;

[0010] Step S4: In each synchronization period Ttb, each slave device gradually changes the minimum adjustment time Tsys according to the adjustment gradient of Terror / N, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0011] Furthermore, the step S1 is specifically as follows:

[0012] Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

[0013] Furthermore, in step S2, N=Ttb / Tsys.

[0014] Furthermore, the step S4 is specifically as follows:

[0015] Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb;

[0016] Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0017] In a second aspect, the present invention provides a parallel device signal synchronization regulation system, comprising the following modules:

[0018] A master device selection module is used to select one of the charging devices connected in parallel as the master device and the others as slave devices;

[0019] A system clock number calculation module is used to set a minimum adjustment time Tsys for each slave device, obtain the synchronization period Ttb of the master device, and calculate the system clock number N based on the minimum adjustment time Tsys and the synchronization period Ttb;

[0020] The time difference calculation module is used for the master device to send a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device;

[0021] The signal synchronization module is used for each slave device to gradually change the minimum adjustment time Tsys according to the adjustment gradient of Terror / N in each synchronization period Ttb, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0022] Furthermore, the master device selection module is specifically used for:

[0023] Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

[0024] Furthermore, in the system clock number calculation module, N=Ttb / Tsys.

[0025] Furthermore, the signal synchronization module is specifically used for:

[0026] Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb;

[0027] Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0028] The advantages of the present invention are:

[0029] By selecting one of the parallel charging devices as the master device and the others as slave devices, each slave device sets a minimum adjustment time Tsys, obtains the synchronization period Ttb of the master device, and calculates the number of system clocks N based on the minimum adjustment time Tsys and the synchronization period Ttb; then the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 moment of the local device. In each synchronization period Ttb, the minimum adjustment time Tsys is gradually changed according to the adjustment gradient of Terror / N, so that the rising edge of the synchronization signal is infinitely close to the system 0 moment of the local device, thereby completing the signal synchronization of the parallel charging devices; in the signal synchronization process, the synchronization period Ttb is divided into an adjustment stage T1 and an adjustment stage T2 for synchronization respectively. In the adjustment stage T1, the minimum adjustment time Tsys is gradually changed with an adjustment gradient of Terror / N+1 to increase the minimum adjustment resolution to 1, and the system 0 moment of each slave device is synchronized with the rising edge of the synchronization signal, thereby greatly improving the signal synchronization accuracy of the parallel charging devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0031] Figure 1 The present invention is a flow chart of a method for synchronously regulating signals of parallel devices.

[0032] Figure 2 The present invention is a structural schematic diagram of a parallel device signal synchronization regulation system.

[0033] Figure 3 It is a signal synchronization schematic diagram of the present invention. DETAILED DESCRIPTION

[0034] The technical solution in the embodiment of the present application has the following overall idea: because the adjustment amount written by Tsys is an integer, there may be decimals in Terror / N, and there will be a certain adjustment error each time Ttb is adjusted, and the decimal part will not be written, so the minimum adjustment resolution can reach N-1 at most. In order to improve this resolution, segmented adjustment is used, that is, the decimal part is divided into two adjustment stages, T1 and T2, for adjustment. The adjustment value of stage T1 is +1, and the adjustment value of stage T2 is +0. The ratio of stages T1 to T2 is: T1 / T2=(Terror%N) / N, where T1+T2=Ttb. In this way, the minimum adjustment resolution can be increased to 1, and the system 0 moment of each slave device can be accurately synchronized with the rising edge of the synchronization signal to improve the signal synchronization accuracy of parallel charging devices.

[0035] Please refer to Figures 1 to 3As shown, a preferred embodiment of a method for synchronously adjusting signals of parallel devices of the present invention comprises the following steps:

[0036] Step S1, selecting one of the charging devices connected in parallel as the master device and the others as slave devices;

[0037] Step S2: Each slave device sets a minimum adjustment time Tsys, obtains the synchronization period Ttb of the master device, and calculates the number N of system clocks for synchronization adjustment based on the minimum adjustment time Tsys and the synchronization period Ttb;

[0038] Step S3, the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device;

[0039] Step S4: In each synchronization period Ttb, each slave device gradually changes the minimum adjustment time Tsys according to the adjustment gradient of Terror / N, and after several feedback adjustments, the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0040] The step S1 is specifically as follows:

[0041] Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

[0042] In the step S2, N=Ttb / Tsys.

[0043] That is, the length from system time 0 to system time N-1 is N=Ttb / Tsys.

[0044] The step S4 is specifically as follows:

[0045] Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb;

[0046] Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0047] A preferred embodiment of a parallel device signal synchronization regulation system of the present invention includes the following modules:

[0048] A master device selection module is used to select one of the charging devices connected in parallel as the master device and the others as slave devices;

[0049] A system clock number calculation module is used to set a minimum adjustment time Tsys for each slave device, obtain the synchronization period Ttb of the master device, and calculate the number N of system clocks for synchronization adjustment based on the minimum adjustment time Tsys and the synchronization period Ttb;

[0050] The time difference calculation module is used for the master device to send a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device;

[0051] The signal synchronization module is used for each slave device to gradually change the minimum adjustment time Tsys according to the adjustment gradient of Terror / N in each synchronization period Ttb, and after several feedback adjustments, the rising edge of the synchronization signal is infinitely close to the system 0 time of the local device, thereby completing the signal synchronization of each parallel charging device.

[0052] The master device selection module is specifically used for:

[0053] Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

[0054] In the system clock number calculation module, N=Ttb / Tsys.

[0055] That is, the length from system time 0 to system time N-1 is N=Ttb / Tsys.

[0056] The signal synchronization module is specifically used for:

[0057] Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb;

[0058] Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

[0059] In summary, the advantages of the present invention are:

[0060] By selecting one of the parallel charging devices as the master device and the others as slave devices, each slave device sets a minimum adjustment time Tsys, obtains the synchronization period Ttb of the master device, and calculates the number of system clocks N based on the minimum adjustment time Tsys and the synchronization period Ttb; then the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 moment of the local device. In each synchronization period Ttb, the minimum adjustment time Tsys is gradually changed according to the adjustment gradient of Terror / N, so that the rising edge of the synchronization signal is infinitely close to the system 0 moment of the local device, thereby completing the signal synchronization of the parallel charging devices; in the signal synchronization process, the synchronization period Ttb is divided into an adjustment stage T1 and an adjustment stage T2 for synchronization respectively. In the adjustment stage T1, the minimum adjustment time Tsys is gradually changed with an adjustment gradient of Terror / N+1 to increase the minimum adjustment resolution to 1, and the system 0 moment of each slave device is synchronized with the rising edge of the synchronization signal, thereby greatly improving the signal synchronization accuracy of the parallel charging devices.

[0061] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for synchronously adjusting signals of parallel devices, characterized in that: The steps include: Step S1, selecting one of the charging devices connected in parallel as the master device and the others as slave devices; Step S2: Each slave device sets a minimum adjustment time Tsys, obtains the synchronization period Ttb of the master device, and calculates the number of system clocks N based on the minimum adjustment time Tsys and the synchronization period Ttb; Step S3, the master device sends a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device; Step S4: In each synchronization period Ttb, each slave device gradually changes the minimum adjustment time Tsys according to the adjustment gradient of Terror / N, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

2. A method for synchronously adjusting signals of parallel devices as claimed in claim 1, characterized in that: The step S1 is specifically as follows: Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

3. A method for synchronously adjusting signals of parallel devices as claimed in claim 1, characterized in that: In the step S2, N=Ttb / Tsys.

4. A method for synchronously adjusting signals of parallel devices as claimed in claim 1, characterized in that: The step S4 is specifically as follows: Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb; Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

5. A parallel device signal synchronization regulation system, characterized in that: Includes the following modules: A master device selection module is used to select one of the charging devices connected in parallel as the master device and the others as slave devices; A system clock number calculation module is used to set a minimum adjustment time Tsys for each slave device, obtain the synchronization period Ttb of the master device, and calculate the system clock number N based on the minimum adjustment time Tsys and the synchronization period Ttb; The time difference calculation module is used for the master device to send a synchronization signal to each slave device at a frequency of 1 / Ttb, and each slave device collects the time difference Terror between the rising edge of the synchronization signal and the system 0 time of the local device; The signal synchronization module is used for each slave device to gradually change the minimum adjustment time Tsys according to the adjustment gradient of Terror / N in each synchronization period Ttb, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

6. A parallel device signal synchronization regulation system as claimed in claim 5, characterized in that: The master device selection module is specifically used for: Based on the trouble-free operation time, one of the charging devices in parallel is selected as the master device, and the rest are slave devices. Each slave device maintains a heartbeat connection with the master device. When the heartbeat connection with the master device is disconnected, a new one is selected as the master device.

7. A parallel device signal synchronization regulation system as claimed in claim 5, characterized in that: In the system clock number calculation module, N=Ttb / Tsys.

8. A parallel device signal synchronization regulation system as claimed in claim 5, characterized in that: The signal synchronization module is specifically used for: Each slave device sets an adjustment phase T1 and an adjustment phase T2, T1 / T2=(Terror%N) / N, and T1+T2=Ttb; Each slave device gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N+1 during the adjustment stage T1, and gradually changes the minimum adjustment time Tsys with an adjustment gradient of Terror / N during the adjustment stage T2, so that the rising edge of the synchronization signal is infinitely close to the local system 0 time, thereby completing the signal synchronization of each parallel charging device.

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