Multi-converter carrier synchronization control method, device and system

Abstract

The invention discloses a multi-converter carrier synchronization control method, device and system. The method comprises the following steps: triangular carrier signals with the same frequency and phase are stored in each controlled converter; when the controlled converter receives data sent by a data sender, a carrier synchronization signal is extracted from the received data; judging a phase relationship between the extracted carrier synchronization signal and a triangular carrier signal in the controlled converter; adjusting the peak value of the triangular carrier signal according to the judgment result of the phase relationship to realize phase consistency, if the phase of the triangular carrier signal is judged to be ahead of the carrier synchronization signal, controlling to adjust the peak value of the triangular carrier signal to be an increased preset value, and if the phase of the triangular carrier signal is judged to be lagged behind the carrier synchronization signal, controlling to adjust the peak value of the triangular carrier signal to be an increased preset value. And controlling the peak value of the triangular carrier signal to be adjusted to a reduced preset value. The method has the advantages of simple implementation method, low execution cost and complexity, high stability and reliability, strong anti-interference performance and the like.

Description

Technical Field

[0001] The present invention relates to the field of converter control technology, and in particular to a multi-converter carrier synchronization control method, device and system. Background Art

[0002] The method of connecting multiple converters in parallel is currently the main way to achieve high-power and high-capacity applications. The converters in parallel need to coordinate their work and be dispatched uniformly through data communication. At the same time, since the converters in parallel are asynchronous operation systems, high-frequency circulating currents are easily generated between the converters, which will increase losses and reduce the utilization rate of electric energy. In severe cases, it will cause the power system to oscillate or even collapse. Therefore, not only do the converters need to complete power dispatch and transmission of related data through data communication to achieve unified dispatch, but they also need carrier synchronization to reduce high-frequency circulating currents and achieve stable operation of multiple converters in parallel.

[0003] In the prior art, the data communication system and the carrier synchronization system of the converter are separately arranged, that is, the data communication process and the carrier synchronization process are executed independently of each other, which will not only increase the implementation cost of carrier synchronization, but also increase 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, easily causing 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: A multi-converter carrier synchronization control method, the steps comprising: 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, 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, and 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.

[0006] Further, each converter is connected via a linear connection or a ring network, and extracting a carrier synchronization signal from the received data includes: 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 first triangular carrier signal ZB1 stored locally when sending data.

[0007] Furthermore, 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.

[0008] Furthermore, 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 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.

[0009] Furthermore, the method further includes numbering each controlled converter, and when the controlled converter receives a data packet, obtaining a dispatching or control instruction corresponding to each controlled converter according to the converter number.

[0010] Further, each converter is connected to a control scheduler respectively, 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 when the control scheduler aligns the data to be sent with the second triangular carrier signal ZB stored locally when sending data.

[0011] 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, and each controlled converter feeds back power data and status information to the control scheduler.

[0012] 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.

[0013] 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 a phase mismatch value between the carrier phase mismatch configuration signal ZB2 and the first triangular carrier signal ZB1.

[0014] An electronic device comprises 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.

[0015] A multi-converter system comprises a plurality of converters, wherein each converter is controlled according to the above method to achieve carrier synchronization.

[0016] A computer-readable storage medium storing a computer program, wherein the computer program implements the above method when executed by a processor.

[0017] Compared with the prior art, the advantages of the present invention are: 1. The present invention stores the same first triangular carrier signal inside each controlled converter to achieve carrier phase synchronization of all converters. In 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 and extracts the carrier synchronization signal, the carrier synchronization signal is compared 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. The data communication process and the carrier synchronization process can be integrated together, and the data communication process between multiple converters can be fully integrated to complete the 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, a large range of sudden changes in the carrier value can be effectively avoided, thereby ensuring the stability and reliability of the control.

[0018] 2. The present invention further stores a carrier phase mismatch configuration signal inside each controlled converter. When data communication is performed between converters, a 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

[0019] Figure 1 It is a schematic diagram of the system structure principle when this embodiment is applicable to a linear connection topology.

[0020] Figure 2 It is a schematic diagram of the system structure principle when this embodiment is applicable to a ring connection topology.

[0021] Figure 3 It is a schematic diagram of the system structure principle when this embodiment is applicable to the 1+X connection topology.

[0022] Figure 4 It is a schematic diagram of the implementation flow of the multi-converter carrier synchronization control method of this embodiment.

[0023] Figure 5 Schematic diagram of the waveform of the triangular carrier signal used in this embodiment.

[0024] 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.

[0025] Figure 7 It is a schematic diagram of the data communication protocol format adopted in a specific application embodiment of the present invention.

[0026] 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.

[0027] Fig. 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.

[0028] Fig.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.

[0029] Fig.11 It is a schematic diagram of the effect of aligning the start bit of the first word with the trough position in a specific application embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of the carrier synchronization effect in a specific application embodiment of the present invention.

[0031] Fig.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.

[0032] Fig.14 It is a schematic diagram of the principle of extracting the carrier synchronization signal in a specific application embodiment of the present invention.

[0033] Fig.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.

[0034] Fig.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

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0036] 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, wherein the linear connection topology is formed by connecting each converter in sequence, the ring connection topology is formed by connecting each converter in sequence to form a ring network, and the 1+X connection topology is that 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 the above-mentioned systems of various types, each converter has a sending and receiving system, which is used to send and receive data and carrier synchronization signals respectively. The data received by the receiving module is used to realize unified scheduling and control between converters. At the same time, the carrier synchronization signal is carried in the transmitted data. The carrier synchronization signal is extracted from the data received by the receiving module and then 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 realize 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, i.e., ±Δ. Phase consistency is achieved through adjustment of multiple cycles, which can avoid large-scale mutations in the carrier value and ensure the stability, reliability and anti-interference of the control.

[0037] 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.

[0038] like Figure 1As shown, this linear connection topology is suitable for only sending scheduling and control instructions to each converter, without the need for the converter to feedback power data and status information. Each converter stores the first triangular carrier signal ZB1 and the carrier phase mismatch configuration signal ZB2, and receives and sends data through the receiving module and the sending module respectively, and the received and sent data carry a carrier synchronization signal. Assuming that the first converter is used as a control scheduler, that is, the first converter is a converter and also a control scheduler, the first converter sends data to the second converter, and after the second converter receives the data sent by the first converter, it extracts the scheduling and control instructions corresponding to the second converter from the data to realize the scheduling and control of the second converter, and extracts the carrier synchronization signal at the same time, and compares it with the local first triangular carrier signal ZB1 to adjust the peak value of the local first triangular carrier signal ZB1 to realize carrier synchronization, and the second converter then transmits the data to the third converter, and so on. Furthermore, during the data transmission process, the carrier phase error configuration signal ZB2 and the phase error value δ stored in the data field can also be used to maintain a fixed deviation between different converters.

[0039] like Figure 2 As shown, the ring connection topology is suitable for sending power scheduling and control instructions to each converter while monitoring the power data and status information fed back by each converter. Each converter stores the first triangular carrier signal ZB1 and the carrier phase mismatch configuration signal ZB2, and receives and sends data through the receiving module and the sending module respectively, and the received and sent data carry a carrier synchronization signal. A converter in the ring network can be set as a control scheduler, that is, the logical first converter, and the converter as the control scheduler starts to transmit scheduling and control instructions to the next converter. The converter also needs to feedback power data and status information, and finally returns the updated data to the logical first converter set. The first converter obtains the information fed back by each converter based on the returned data. During the data transmission process, whenever the converter receives the data transmitted by the previous converter, the carrier synchronization signal is extracted, and the peak value of the local first triangular carrier signal ZB1 is adjusted after comparing it with the local first triangular carrier signal ZB1 to achieve carrier synchronization. Furthermore, during the data transmission process, the carrier phase error configuration signal ZB2 and the phase error value δ stored in the data field can also be used to maintain a fixed deviation between different converters.

[0040] like Figure 3As shown, the 1+X connection structure is responsible for issuing power scheduling and control instructions and monitoring the power data and status information fed back by the converter through a separate control scheduler. The control scheduler is separated from the data channel of each converter, and each transmission channel only contains the power scheduling and control instructions of the corresponding converter. The second triangular carrier signal ZB is stored in the control scheduler, and the control scheduler sends scheduling and control instructions to each converter respectively. After each converter receives the data sent by the control scheduler, it 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; further, during the data transmission process, 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, thereby realizing the carrier phase mismatch configuration between each converter.

[0041] The present invention realizes data transmission and carrier synchronization simultaneously by integrating the data communication system, and can achieve carrier phase consistency or maintain a fixed phase deviation in the ring network by adjusting multiple cycles. In the synchronization process, large-scale mutations of the carrier value can be avoided, so that the pulse output is reliable.

[0042] The present invention will be further described below in conjunction with specific embodiments.

[0043] like Figure 4 As shown, the steps of the multi-converter carrier synchronization control method of this embodiment include: Step S01. Each controlled converter internally stores a first triangular carrier signal ZB1 with the same frequency and phase.

[0044] In this embodiment, two triangular carrier signals ZB1 and ZB2 are included, wherein the first triangular carrier signal ZB1 is used to realize the ZB1 phase synchronization of all converters, and the carrier phase mismatch configuration signal ZB2 is used to realize the carrier phase mismatch configuration during the data communication process, so as to realize phase mismatch synchronization with the first triangular carrier signal ZB1, and is used to generate a pulse signal by comparing with the modulation wave, and the phase mismatch value is δ. When δ is 0, the phases of ZB2 and ZB1 are consistent, and the phase mismatch value size configuration of ZB2 can be realized by adjusting δ.

[0045] like Figure 5 As shown, the triangular carrier signals ZB1 and ZB2 are divided into two stages: in the increasing stage, the value of the triangular carrier increases from the trough to the peak, and in the decreasing stage, the value of the triangular carrier decreases from the peak to the trough. The triangular carrier value of the converter increases and decreases at the trough and peak value. The triangular carrier increases to the peak value and decreases to the trough, and increases when it decreases to the trough.

[0046] Step S02: When the controlled converter receives the data sent by the data sender, it extracts the carrier synchronization signal from the received data.

[0047] 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 data transmission process can be integrated to transmit the carrier synchronization signal.

[0048] 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 a carrier synchronization signal from the received data include: 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 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 first triangular carrier signal ZB1 stored locally when sending data.

[0049] If each converter is connected to a control scheduler, that is, a topology of sampling 1+X is adopted, the carrier synchronization signal extracted 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 a carrier synchronization signal. The data alignment bit is a data bit used when the control scheduler aligns the data to be sent with the second triangular carrier signal ZB stored locally when sending data.

[0050] In this embodiment, each controlled converter is further numbered. When the controlled converter receives a data packet, the scheduling or control instruction corresponding to each controlled converter is obtained according to the converter number.

[0051] 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 it is a linear or ring network connection topology, the converter aligns the start bit of the first word with the ZB1 trough signal when sending data. If it is a 1+X connection topology, the control scheduler aligns the start bit of the first word with the ZB trough signal when sending, which is the trough position of the triangular carrier. The phase error value δ is included in the data field of each converter number, realizing the synchronization fusion of data communication and carrier. Figure 7 As shown, each word in the transmitted data contains a start bit, data bit, check bit, and stop bit, and the last word is a CRC check.

[0052] It can be understood that the carrier synchronization signal can be at other 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.

[0053] like Figure 8 As shown, when it is a linear connection topology structure, the converter 1 as the control scheduler sends power scheduling and control instructions to different converters, and the converter obtains the 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.

[0054] like Fig. 9 As shown, when it is a ring network connection topology structure, the converter 1 serving as the control scheduler sends power scheduling and control instructions to different converters. The converter also needs to feed back 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 fed-back 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, feeds back the updated data.

[0055] like Fig.10 As shown, when it is a 1+X connection topology, the control scheduler is separated from the data channel of each converter, and 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.

[0056] Step S03: Determine the phase relationship between the extracted carrier synchronization signal and the first triangular carrier signal ZB1 in the controlled converter.

[0057] 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.

[0058] 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 Fig.11The 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 Fig.12 The control instruction sent by the converter or the 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. Fig.13 As shown, when the δ value is 0, ZB2 and ZB1 are in phase, as shown in Fig.14 shown.

[0059] Considering the problems of line interference and delay, when the 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 comparing the phase 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 it 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.

[0060] In a specific application embodiment, when the phase of the carrier synchronization signal is compared with the phase of the ZB1 triangle carrier signal to adjust the peak value of the ZB1 triangle carrier, as shown in FIG. Fig.15 , Fig.16 As shown. If the ZB1 triangle carrier is in the rising stage, it is considered that the ZB1 triangle carrier is ahead, that is, the trough signal of the ZB1 triangle carrier is ahead of the carrier synchronization signal, and the peak value of the ZB1 triangle carrier is adjusted to the peak value + Δ. Specifically, the first and second peak values ​​are increased by Δ in the figure. Considering that the trough signal is in phase with the carrier synchronization signal, the third and subsequent peak values ​​are not adjusted; if the ZB1 triangle carrier is in the falling stage, it is considered that the ZB1 triangle carrier is lagging, that is, the trough signal of the ZB1 triangle carrier is lagging relative to the carrier synchronization signal, and the peak value of the ZB1 triangle carrier is adjusted to the peak value - Δ. Specifically, the first and second peak values ​​are reduced by Δ in the figure, and the third and subsequent peak values ​​are not adjusted. Repeat the above judgment and adjustment until the received synchronization signal is set to be consistent with the phase of the ZB1 triangle carrier trough. The above Δ is an adjustment experience value. Considering that instability may occur if the configuration is too large, Δ can be a positive integer within 3.

[0061] The present invention stores the same first triangular carrier signal ZB1 inside each controlled converter to achieve carrier phase synchronization of all converters. In the communication process of each converter, the carrier synchronization signal is embedded in the transmitted data for sending. After each converter receives the transmitted data and extracts the carrier synchronization signal, the carrier synchronization signal is compared 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 the 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, a large range of sudden changes in the carrier value can be effectively avoided, thereby ensuring the stability and reliability of the 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. 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.

[0062] This embodiment further provides a multi-converter system, including a plurality of converters, wherein each converter is controlled according to the above method to achieve carrier synchronization.

[0063] 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 in cooperation 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 related 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 applications. 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.

[0064] This embodiment further provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above method is implemented.

[0065] Those skilled in the art should understand that the above-mentioned embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can 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 the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can 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 the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes 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 an instruction device, which implements the functions 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, so that the instructions executed on the computer or other programmable device provide 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.

[0066] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution 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, 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, and 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 , each converter is connected via a linear connection or a ring network, and extracting a carrier synchronization signal from the received data includes: 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 first triangular carrier signal ZB1 stored locally 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 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.

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 instruction corresponding to each controlled converter is 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 respectively, and extracting the carrier synchronization signal from the received data includes: The currently controlled converter receives the 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 when the control scheduler aligns the data to be sent with the second triangular carrier signal ZB stored locally 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, and 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 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.

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: The converters are controlled to achieve carrier synchronization 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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