Multi-converter carrier synchronization control method, device and system

Abstract

The present invention discloses a multi-converter carrier synchronization control method, device, and system. The method comprises the following steps: each controlled converter stores a triangular carrier signal with the same frequency and phase; when the controlled converter receives data sent by a data sender, it extracts the carrier synchronization signal from the received data; determines the phase relationship between the extracted carrier synchronization signal and the triangular carrier signal in the controlled converter; and adjusts the peak value of the triangular carrier signal based on the phase relationship determination result to achieve phase consistency. If it is determined that the phase of the triangular carrier signal leads the carrier synchronization signal, the peak value of the triangular carrier signal is controlled to increase by a preset value; if it is determined that the phase of the triangular carrier signal lags the carrier synchronization signal, the peak value of the triangular carrier signal is controlled to decrease by a preset value. The method has the advantages of simple implementation, low execution cost and complexity, high stability and reliability, and strong anti-interference performance.

Description

Technical Field

[0001] The present invention relates to the technical field of converter control, and in particular to a method, device and system for synchronous control of carrier waves of multiple converters. Background Art

[0002] Connecting multiple converters in parallel is currently the primary approach for achieving high-power and high-capacity applications. Each converter in parallel requires coordination and unified scheduling via data communication. Furthermore, because these converters operate asynchronously, high-frequency circulating currents are easily generated between them, increasing losses, reducing energy utilization, and in severe cases, causing power system oscillations or even collapse. Therefore, not only does data communication between converters ensure unified power scheduling and transmission of related data, but carrier synchronization is also required to reduce high-frequency circulating currents and ensure stable operation of multiple converters in parallel.

[0003] In the existing technology, the data communication system and the carrier synchronization system of the converter are separately set, that is, the data communication process and the carrier synchronization process are executed independently of each other, which not only increases the implementation cost of carrier synchronization, but also increases the complexity of implementation. In addition, the traditional converter carrier synchronization method usually adopts a direct forced assignment method when controlling the carrier value, that is, forcing the carrier value to be assigned to a specified value, which will result in a large range of sudden changes in the carrier value, which may easily cause problems such as abnormal pulse output. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in response to the technical problems existing in the prior art, the present invention provides a multi-converter carrier synchronization control method, equipment and system with simple implementation method, low execution cost and complexity, high stability and reliability, and strong anti-interference ability, which can reduce the overall implementation cost and complexity of data communication and carrier synchronization, while avoiding abnormal mutations of carrier values ​​during the synchronization process, and improving the stability and reliability of control.

[0005] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0006] A multi-converter carrier synchronization control method, comprising the steps of:

[0007] Each controlled converter internally stores a first triangular carrier signal ZB1 with the same frequency and phase;

[0008] When the controlled converter receives the data sent by the data sender, it extracts the carrier synchronization signal from the received data;

[0009] Determining the phase relationship between the extracted carrier synchronization signal and the first triangular carrier signal ZB1 in the controlled converter;

[0010] The peak value of the first triangular carrier signal ZB1 is adjusted according to the judgment result of the phase relationship to achieve phase consistency. If it is judged that the phase of the first triangular carrier signal ZB1 is ahead of the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to increase the preset value. If it is judged that the phase of the first triangular carrier signal ZB1 lags behind the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to decrease the preset value.

[0011] Furthermore, the converters are connected via a linear connection or a ring network, and extracting the carrier synchronization signal from the received data includes:

[0012] The currently controlled converter receives the data sent by the last controlled converter;

[0013] A data alignment bit is extracted from the received data and used as the carrier synchronization signal. The data alignment bit is a data bit used when the previous controlled converter aligns the data to be sent with the locally stored first triangular carrier signal ZB1 when sending data.

[0014] Furthermore, when the converters are connected linearly, that is, the controlled converters are connected in sequence, one of the controlled converters is used as a control scheduler, and the control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter, and sends it to each controlled converter in sequence; after each controlled converter receives the data packet, it obtains its own scheduling or control instructions from the data packet, and forwards the data packet to the next converter.

[0015] Furthermore, when the converters are connected through a ring network, that is, the controlled converters are connected in sequence to form a ring network, one of the converters is used as a control scheduler, and the control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter and sends it to each controlled converter through the ring network; after each controlled converter receives the data packet, it obtains the scheduling or control instructions of the current controlled converter from the data packet and updates it to the feedback information of each controlled converter, and sends the updated data packet to the next controlled converter until it is returned to the control scheduler, so that the control scheduler obtains the feedback information of each controlled converter.

[0016] Furthermore, the method further includes numbering each controlled converter, and when the controlled converter receives a data packet, obtaining a scheduling or control instruction corresponding to each controlled converter according to the converter number.

[0017] Furthermore, each converter is connected to a control scheduler, and extracting the carrier synchronization signal from the received data includes:

[0018] The currently controlled converter receives data sent by the control scheduler;

[0019] A data alignment bit is extracted from the received data and used as the carrier synchronization signal. The data alignment bit is a data bit used by the control scheduler to align the to-be-sent data with the locally stored second triangular carrier signal ZB when sending data.

[0020] Furthermore, the control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter and sends it to each controlled converter respectively. Each controlled converter feeds back power data and status information to the control scheduler.

[0021] Furthermore, the start bit of the first word is extracted from the received data as the carrier synchronization signal, and the start bit of the first word of the data to be sent is aligned with the valley signal of the locally stored triangular carrier signal at the data transmitter.

[0022] Furthermore, each controlled converter also stores a carrier phase mismatch configuration signal ZB2 for controlling the carrier phases between different converters to maintain a fixed deviation. When data is transmitted between the converters, the data field in the transmitted data also stores the phase mismatch value between the carrier phase mismatch configuration signal ZB2 and the first triangular carrier signal ZB1.

[0023] An electronic device includes a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program to perform the above method.

[0024] A multi-converter system includes a plurality of converters, wherein each converter is controlled according to the above method to achieve carrier synchronization.

[0025] A computer-readable storage medium storing a computer program, wherein the computer program implements the above method when executed by a processor.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] 1. The present invention stores the same first triangular carrier signal inside each controlled converter to achieve carrier phase synchronization of all converters. During the communication process of each converter, the carrier synchronization signal is embedded in the transmitted data for transmission. After each converter receives the transmitted data, it extracts the carrier synchronization signal and compares the carrier synchronization signal with the local first triangular carrier signal. The peak value of the first triangular carrier signal is adjusted according to the phase relationship between the carrier synchronization signal and the local first triangular carrier signal to achieve phase consistency. This can integrate the data communication process with the carrier synchronization process, fully integrate the data communication process between multiple converters, and complete carrier synchronization at the same time, thereby reducing the overall implementation cost and complexity of data communication and carrier synchronization. At the same time, because the phase relationship between the carrier synchronization signal and the local first triangular carrier signal ZB1 is used to adjust the phase of the local carrier, large-scale sudden changes in the carrier value can be effectively avoided, ensuring stable and reliable control.

[0028] 2. The present invention further stores a carrier phase mismatch configuration signal inside each controlled converter. When data communication is performed between converters, the phase mismatch value between the carrier phase mismatch configuration signal and the first triangular carrier signal is also stored in the data field. The data transmission process can also be integrated to maintain a fixed deviation in the carrier phase between each converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the system structure principle when this embodiment is applicable to a linear connection topology.

[0030] Figure 2 This is a schematic diagram of the system structure principle when this embodiment is applicable to a ring connection topology.

[0031] Figure 3 This is a schematic diagram of the system structure principle when this embodiment is applicable to a 1+X connection topology.

[0032] Figure 4 3 is a schematic diagram of the implementation flow of the multi-converter carrier synchronization control method of this embodiment.

[0033] Figure 5 Schematic diagram of the waveform of the triangular carrier signal used in this embodiment.

[0034] Figure 6 It is a schematic diagram of the principle of realizing data communication and carrier synchronization in a specific application embodiment of the present invention.

[0035] Figure 7 It is a schematic diagram of the data communication protocol format adopted in a specific application embodiment of the present invention.

[0036] Figure 8It is a schematic diagram of the principle of realizing data communication and carrier synchronization control based on a linear connection topology in a specific application embodiment of the present invention.

[0037] Figure 9 It is a schematic diagram of the principle of realizing data communication and carrier synchronization control based on a ring connection topology in a specific application embodiment of the present invention.

[0038] Figure 10 It is a schematic diagram of the principle of realizing data communication and carrier synchronization control based on a 1+X connection topology in a specific application embodiment of the present invention.

[0039] Figure 11 It is a schematic diagram of the effect of aligning the start bit of the first word with the valley position in a specific application embodiment of the present invention.

[0040] Figure 12 It is a schematic diagram of the carrier synchronization effect in a specific application embodiment of the present invention.

[0041] Figure 13 It is a schematic diagram of the phase-shifted carrier synchronization effect of the carrier synchronization effect in a specific application embodiment of the present invention.

[0042] Figure 14 It is a schematic diagram of the principle of extracting the carrier synchronization signal in a specific application embodiment of the present invention.

[0043] Figure 15 It is a schematic diagram of the principle of realizing carrier synchronization when the carrier synchronization signal is ahead in a specific application embodiment of the present invention.

[0044] Figure 16 It is a schematic diagram of the principle of realizing carrier synchronization when the carrier synchronization signal lags in a specific application embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0046] The present invention can be applied to different types of connection topologies such as linear connection topology, ring connection topology and 1+X connection topology between converters, and the corresponding system architectures are as follows: Figure 1 、 2, 3, where a linear connection topology is formed by connecting each converter in sequence, a ring connection topology is formed by connecting each converter in sequence to form a ring network, and a 1+X connection topology is formed by connecting each converter in sequence to form a ring network. Each converter is connected to a separate control scheduler, which is responsible for issuing scheduling and control instructions and monitoring the power data and status information fed back by the converter. In each of the above-mentioned types of systems, each converter has a sending and receiving system, which is used to send and receive data and a carrier synchronization signal, respectively. The data received by the receiving module is used to achieve unified scheduling and control between converters. The carrier synchronization signal is also carried in the transmitted data. The carrier synchronization signal is extracted from the data received by the receiving module and compared with the locally stored first triangular carrier signal ZB1. The peak value of the local first triangular carrier signal ZB1 is adjusted according to the phase relationship between the carrier synchronization signal and the local first triangular carrier signal ZB1 to achieve carrier synchronization. Since data communication and carrier synchronization are implemented using the same system, system cost and complexity can be greatly reduced. At the same time, when the converter receives the carrier synchronization signal, it first determines the phase relationship between the carrier synchronization signal and the local carrier, and then adjusts the local carrier peak to increase or decrease the preset value, that is, ±Δ. Phase consistency is achieved through multiple cycles of adjustment, which can avoid large-scale sudden changes in the carrier value and ensure the stability, reliability and anti-interference of the control.

[0047] Furthermore, each converter also has a carrier phase mismatch configuration signal ZB2 for controlling the carrier phases between different converters to maintain a fixed deviation. When data is transmitted between the converters, the data field in the transmitted data stores a phase mismatch value δ between the carrier phase mismatch configuration signal ZB2 and the first triangular carrier signal ZB1, so that the phases between different converters differ by the phase mismatch value δ.

[0048] like Figure 1As shown, this linear connection topology is suitable for applications requiring only dispatching and control instructions to each converter, without requiring the converter to provide feedback on power data and status information. Each converter stores a first triangular carrier signal ZB1 and a carrier phase-shifting configuration signal ZB2. Data is received and transmitted via a receiving module and a transmitting module, respectively. The received and transmitted data includes a carrier synchronization signal. Assuming the first converter acts as a control dispatcher—that is, the first converter acts as both a converter and a control dispatcher—the first converter sends data to the second converter. Upon receiving the data, the second converter extracts the dispatching and control instructions corresponding to the second converter from the data to implement dispatching and control of the second converter. It also extracts the carrier synchronization signal, compares it with the local first triangular carrier signal ZB1, and adjusts the peak value of the local first triangular carrier signal ZB1 to achieve carrier synchronization. The second converter then transmits the data to the third converter, and so on. Furthermore, during the data transmission process, the carrier phase offset configuration signal ZB2 and the phase offset value δ stored in the data field can also be used to maintain a fixed deviation between different converters.

[0049] like Figure 2 As shown, this ring connection topology is suitable for simultaneously issuing power scheduling and control instructions to each converter while also monitoring the power data and status information fed back by each converter. Each converter stores a first triangular carrier signal ZB1 and a carrier phase-shifting configuration signal ZB2. Data is received and transmitted via a receiving module and a transmitting module, respectively. The received and transmitted data includes a carrier synchronization signal. One converter in the ring network can be configured as a control scheduler, logically the first converter. This converter, acting as the control scheduler, transmits scheduling and control instructions to the next converter. The converter also needs to feedback power data and status information. Finally, the updated data is returned to the logically first converter. The first converter then obtains information fed back from each converter based on the returned data. During data transmission, each converter extracts the carrier synchronization signal when receiving data transmitted by the previous converter. This signal is compared with the local first triangular carrier signal ZB1, and the peak value of the local first triangular carrier signal ZB1 is adjusted to achieve carrier synchronization. Furthermore, during the data transmission process, the carrier phase offset configuration signal ZB2 and the phase offset value δ stored in the data field can also be used to maintain a fixed deviation between different converters.

[0050] like Figure 3As shown, this 1+X connection structure uses a separate control scheduler to issue power scheduling and control instructions and monitor the power data and status information fed back by the converters. The control scheduler is separate from the data channel of each converter, and each transmission channel only contains the power scheduling and control instructions for the corresponding converter. The control scheduler stores the second triangular carrier signal ZB, which is used to send scheduling and control instructions to each converter. After receiving the data sent by the control scheduler, each converter extracts the carrier synchronization signal, compares it with the local first triangular carrier signal ZB1, and adjusts the peak value of the local first triangular carrier signal ZB1 to achieve carrier synchronization. Furthermore, during data transmission, the carrier phase mismatch configuration signal ZB2 stored in each converter and the phase mismatch value δ stored in the data field of the transmitted data can also be used to maintain a fixed deviation between different converters, achieving carrier phase mismatch configuration between converters.

[0051] The present invention realizes data transmission and carrier synchronization simultaneously by integrating the data communication system. The carrier phase in the ring network can be made consistent or a fixed phase deviation can be maintained by adjusting multiple cycles. Large-scale mutations of the carrier value can be avoided during the synchronization process, making the pulse output reliable.

[0052] The present invention will be further described below with reference to specific embodiments.

[0053] like Figure 4 As shown, the steps of the multi-converter carrier synchronization control method of this embodiment include:

[0054] Step S01: Each controlled converter internally stores a first triangular carrier signal ZB1 with the same frequency and phase.

[0055] In this embodiment, two triangular carrier signals, ZB1 and ZB2, are included. The first triangular carrier signal, ZB1, is used to synchronize the ZB1 phases of all converters. The carrier phase shift configuration signal, ZB2, is used to implement phase shift configuration during data communication, achieving phase shift synchronization with the first triangular carrier signal, ZB1. This signal is used to generate a pulse signal for comparison with the modulated wave, with a phase shift value of δ. When δ is 0, ZB2 and ZB1 are in phase. Adjusting δ allows for varying the phase shift value of ZB2.

[0056] like Figure 5 As shown, the triangular carrier signals ZB1 and ZB2 are divided into two phases: in the increasing phase, the triangular carrier value increases from trough to peak, and in the decreasing phase, the triangular carrier value decreases from peak to trough. The converter triangular carrier value increases and decreases at the trough and peak values, decreasing when increasing to the peak value and increasing when decreasing to the trough.

[0057] Step S02: When the controlled converter receives data sent by the data sender, it extracts a carrier synchronization signal from the received data.

[0058] In this embodiment, by combining a specific data sending method, the transmitted data is aligned with the local first triangular carrier signal ZB1 when the data is sent, and the data alignment bit is extracted at the data receiving end as a carrier synchronization signal, so that the carrier synchronization signal can be transmitted in the data transmission process.

[0059] If the converters are connected via a linear connection or a ring network, that is, a linear connection or a ring network topology is adopted, the steps of extracting the carrier synchronization signal from the received data include:

[0060] The currently controlled converter receives the data sent by the last controlled converter;

[0061] A data alignment bit is extracted from the received data and used as a carrier synchronization signal. The data alignment bit is a data bit used when the previous controlled converter aligns the data to be sent with the locally stored first triangular carrier signal ZB1 when sending data.

[0062] If each converter is connected to a control scheduler, that is, a sampling 1+X topology, the carrier synchronization signal extracted from the received data includes:

[0063] The currently controlled converter receives data sent by the control scheduler;

[0064] A data alignment bit is extracted from the received data and used as a carrier synchronization signal. The data alignment bit is a data bit used by the control scheduler to align the data to be sent with the locally stored second triangular carrier signal ZB when sending data.

[0065] In this embodiment, each controlled converter is further numbered. When a controlled converter receives a data packet, the corresponding scheduling or control instruction of each controlled converter is obtained according to the converter number.

[0066] For example, Figure 6 As shown, when data is communicated between converters, each converter is numbered (converter #1 to converter #n). The transmitted data includes data words and check words. If the topology is linear or ring network, the converter aligns the start bit of the first word with the ZB1 valley signal when sending data. If the topology is 1+X, the control scheduler aligns the start bit of the first word with the ZB valley signal when sending data, which is the valley position of the triangular carrier. The phase error value δ is included in the data field of each converter number, realizing the synchronization of data communication and carrier. Figure 7As shown in the figure, each word in the transmitted data contains a start bit, data bits, check bits, and stop bits, and the last word is a CRC check.

[0067] It can be understood that the carrier synchronization signal can be at positions other than the trough position, such as the peak position, etc. The carrier synchronization signal can even directly use pulses, that is, by transmitting synchronization pulses as carrier synchronization signals. The transmission method can also adopt other methods. The key is to determine the phase relationship between the data and the local triangular carrier signal.

[0068] like Figure 8 As shown, when it is a linear connection topology, converter 1, which serves as a control scheduler, issues power scheduling and control instructions to different converters. The converter obtains corresponding data according to its own number. The converter does not need to feedback power data and status information, and forwards the data directly to the next converter.

[0069] like Figure 9 As shown, when it is a ring network connection topology, the converter 1 serving as the control scheduler sends power scheduling and control instructions to different converters. The converter also needs to feedback power data and status information at the same time. Therefore, each converter takes the corresponding data according to its own number and updates the data to the feedback power data and status information. Finally, the updated data is returned to the converter 1 set as the control scheduler. The converter 1 of the control scheduler obtains the information of converters with different numbers according to different number positions, that is, feedbacks the updated data.

[0070] like Figure 10 As shown in the figure, when it is a 1+X connection topology, the control scheduler is separated from the data channel of each converter. Each sending channel only contains the power scheduling and control instructions of the corresponding converter. At the same time, each converter feeds back power data and status information. The filled blocks in the figure are the feedback updated data.

[0071] Step S03: Determine the phase relationship between the extracted carrier synchronization signal and the first triangular carrier signal ZB1 in the controlled converter.

[0072] Step S04. Adjust the peak value of the first triangular carrier signal ZB1 according to the judgment result of the phase relationship to achieve phase consistency, wherein if it is judged that the phase of the first triangular carrier signal ZB1 is ahead of the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to increase the preset value; if it is judged that the phase of the first triangular carrier signal ZB1 lags behind the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to decrease the preset value.

[0073] In a specific application embodiment, the converter aligns the start bit of the first word with the ZB1 valley signal when sending, and the control scheduler aligns the start bit of the first word with the ZB valley signal when sending, such as Figure 11 The converter uses the start bit of the first word received as the carrier synchronization signal and compares the phase with the local first triangular carrier signal ZB1 to achieve carrier synchronization. The synchronization effect is shown in the figure. Figure 12 The control instruction sent by the converter or control scheduler includes a phase shift value δ, and the carrier phase shift configuration signal ZB2 is aligned with the first triangular carrier signal ZB1 according to the δ value, as shown in FIG. Figure 13 As shown, when the δ value is 0, the phases of ZB2 and ZB1 are consistent, as shown in Figure 14 shown.

[0074] Considering issues such as line interference and delay, when line interference causes the start bit to be falsely triggered in the IDLE state, the current carrier cycle adjustment may be invalid. Since the present invention adjusts the peak value of the ZB1 triangle carrier after phase comparison between the carrier synchronization signal and the local triangle carrier ZB1, the adjustment amount is very small, and the overall impact within a period of time can be almost ignored. During the transmission process, it will only affect the correctness of the data, which can be checked by the CRC check code. Therefore, the present invention has good anti-interference performance, and the delay problem can be compensated according to calculation, and can be taken into consideration when comparing the carrier synchronization signal with the ZB1 triangle carrier. Therefore, it can effectively provide stable reliability and anti-interference performance of carrier synchronization without affecting the transmission performance.

[0075] In a specific application embodiment, when the phases of the carrier synchronization signal and the ZB1 triangle carrier signal are compared to adjust the peak value of the ZB1 triangle carrier, as shown in FIG. Figure 15 、 Figure 16 As shown. If the ZB1 triangle carrier is in the rising phase, it is considered that the ZB1 triangle carrier is ahead, that is, the ZB1 triangle carrier's trough signal is ahead of the carrier synchronization signal. The ZB1 triangle carrier peak is adjusted to Peak + Δ. Specifically, the first and second peaks are increased by Δ in the figure. Considering that the trough signal is in phase with the carrier synchronization signal, the third and subsequent peaks are not adjusted. If the ZB1 triangle carrier is in the falling phase, it is considered that the ZB1 triangle carrier is lagging, that is, the ZB1 triangle carrier's trough signal is lagging relative to the carrier synchronization signal. The ZB1 triangle carrier peak is adjusted to Peak - Δ. Specifically, the first and second peaks are reduced by Δ in the figure, and the third and subsequent peaks are not adjusted. Repeat this judgment and adjustment until the received synchronization signal is aligned with the ZB1 triangle carrier's trough phase. The above Δ is an empirical adjustment value. Considering that an excessively large value may cause instability, Δ can be a positive integer within 3.

[0076] The present invention stores the same first triangular carrier signal ZB1 inside each controlled converter to achieve carrier phase synchronization of all converters. During the communication process of each converter, the carrier synchronization signal is embedded in the transmitted data for transmission. After each converter receives the transmitted data, it extracts the carrier synchronization signal and compares the carrier synchronization signal with the local first triangular carrier signal ZB1. The peak value of the first triangular carrier signal ZB1 is adjusted according to the phase relationship between the carrier synchronization signal and the local first triangular carrier signal ZB1 to achieve phase consistency. The data communication process and the carrier synchronization process can be integrated together, and the data communication process between multiple converters is fully integrated to complete carrier synchronization at the same time, thereby reducing the overall implementation cost and complexity of data communication and carrier synchronization. At the same time, since the phase relationship between the carrier synchronization signal and the local first triangular carrier signal ZB1 is used to adjust the phase of the local carrier, large-scale sudden changes in the carrier value can be effectively avoided, ensuring stable and reliable control. Furthermore, a carrier phase mismatch configuration signal ZB2 is stored inside each controlled converter. When data communication is performed between converters, the phase mismatch value between the carrier phase mismatch configuration signal ZB2 and the first triangular carrier signal ZB1 is also stored in the data field. The data transmission process can also be integrated to keep the carrier phase between each converter fixed.

[0077] This embodiment further provides an electronic device, including a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program to perform the above method.

[0078] This embodiment further provides a multi-converter system, including multiple converters, wherein each converter is controlled according to the above method to achieve carrier synchronization.

[0079] It is understandable that the above method of this embodiment can be executed by a single device, such as a computer or server, etc., and can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of a distributed scenario, one of the multiple devices can only execute one or more steps in the above method of this embodiment, and multiple devices interact to complete the above method. The processor can be implemented in the form of a general-purpose CPU, a microprocessor, an application-specific integrated circuit, or one or more integrated circuits, etc., for executing relevant programs to implement the above method of this embodiment. The memory can be implemented in the form of a read-only memory ROM, a random access memory RAM, a static storage device, and a dynamic storage device. The memory can store an operating system and other application programs. When the above method of this embodiment is implemented by software or firmware, the relevant program code is stored in the memory and called and executed by the processor.

[0080] This embodiment further provides a computer-readable storage medium storing a computer program, which implements the above method when executed by a processor.

[0081] Those skilled in the art will appreciate that the above-mentioned embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, may be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including the instruction device, which implements the function specified in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0082] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed above with reference to the preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent variations, and modifications to the above embodiment that do not depart from the technical solution of the present invention and are based on the technical essence of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A multi-converter carrier synchronization control method, characterized in that , the steps include: Each controlled converter internally stores a first triangular carrier signal ZB1 with the same frequency and phase; When the controlled converter receives the data sent by the data sender, it extracts the carrier synchronization signal from the received data; Determining the phase relationship between the extracted carrier synchronization signal and the first triangular carrier signal ZB1 in the controlled converter; The peak value of the first triangular carrier signal ZB1 is adjusted according to the judgment result of the phase relationship to achieve phase consistency. If it is judged that the phase of the first triangular carrier signal ZB1 is ahead of the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to increase the preset value. If it is judged that the phase of the first triangular carrier signal ZB1 lags behind the carrier synchronization signal, the control adjusts the peak value of the first triangular carrier signal ZB1 to decrease the preset value.

2. The multi-converter carrier synchronization control method according to claim 1, characterized in that ,The converters are connected through a linear connection or a ring network, and the carrier synchronization signal is extracted from the received data including: The currently controlled converter receives the data sent by the last controlled converter; A data alignment bit is extracted from the received data and used as the carrier synchronization signal. The data alignment bit is a data bit used when the previous controlled converter aligns the data to be sent with the locally stored first triangular carrier signal ZB1 when sending data.

3. The multi-converter carrier synchronization control method according to claim 2, characterized in that When each converter is connected linearly, that is, each controlled converter is connected in sequence, one of the controlled converters is used as a control scheduler, and the control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter, and sends it to each controlled converter in sequence; after each controlled converter receives the data packet, it obtains its own scheduling or control instructions from the data packet and forwards the data packet to the next converter.

4. The multi-converter carrier synchronization control method according to claim 2, characterized in that When each converter is connected through a ring network, that is, each controlled converter is connected in sequence to form a ring network, one of the converters is used as a control scheduler, and the control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter and sends it to each controlled converter through the ring network; after each controlled converter receives the data packet, it obtains the scheduling or control instructions of the current controlled converter from the data packet and updates it as the feedback information of each controlled converter, and sends the updated data packet to the next controlled converter until it is returned to the control scheduler, so that the control scheduler obtains the feedback information of each controlled converter.

5. The multi-converter carrier synchronization control method according to claim 4, characterized in that ,It also includes numbering each controlled converter. When the controlled converter receives the data packet, the scheduling or control instructions corresponding to each controlled converter are obtained according to the converter number.

6. The multi-converter carrier synchronization control method according to claim 1, characterized in that Each converter is connected to a control scheduler, and extracting the carrier synchronization signal from the received data includes: The currently controlled converter receives data sent by the control scheduler; A data alignment bit is extracted from the received data and used as the carrier synchronization signal. The data alignment bit is a data bit used by the control scheduler to align the to-be-sent data with the locally stored second triangular carrier signal ZB when sending data.

7. The multi-converter carrier synchronization control method according to claim 6, characterized in that The control scheduler forms a data packet with the scheduling or control instructions corresponding to each controlled converter and sends it to each controlled converter respectively. Each controlled converter feeds back power data and status information to the control scheduler.

8. The multi-converter carrier synchronization control method according to any one of claims 1 to 7, characterized in that , extract the start bit of the first word from the received data as the carrier synchronization signal, and align the start bit of the first word of the data to be sent with the valley signal of the locally stored triangular carrier signal at the data sender.

9. The multi-converter carrier synchronization control method according to any one of claims 1 to 7, characterized in that Each controlled converter also stores a carrier phase mismatch configuration signal ZB2 for controlling the carrier phases between different converters to maintain a fixed deviation. When data is transmitted between converters, the data field of the transmitted data also stores the phase mismatch value between the carrier phase mismatch configuration signal ZB2 and the first triangular carrier signal ZB1.

10. An electronic device comprising a processor and a memory, wherein the memory is used to store a computer program, wherein: The processor is configured to execute the computer program to perform the method according to any one of claims 1 to 9.

11. A multi-converter system comprising a plurality of converters, characterized in that: Carrier synchronization is achieved between the converters by controlling the converters according to the method described in any one of claims 1 to 9.

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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