Generator set parallel operation communication conversion device and control method

Abstract

The application provides a generator set parallel operation communication conversion device and a control method, relates to the technical field of electric power communication, and comprises: a plurality of power generation devices provided with power generation device controllers; a protocol converter connected with the plurality of power generation device controllers, comprising a protocol automatic identification module for automatically identifying the protocol types of communication signals sent by the plurality of power generation device controllers according to a preset protocol feature library, and a protocol semantic conversion module for converting the same physical quantity parameters under different protocol types into a standard format based on preset semantic conversion rules and performing parameter address mapping. The device realizes the physical connection and logical communication between different power generation device controllers through the protocol converter, realizes the effective interaction of key operating state parameters through protocol automatic identification and semantic conversion, the unified parameter format improves the accuracy of parallel operation closing and the balance of load distribution, enhances the system expansibility and supports cross-regional parallel operation.

Description

Technical Field

[0001] This invention relates to the field of power communication technology, and in particular to a generator set parallel communication conversion device and control method. Background Technology

[0002] Parallel operation, as a core function for expanding the capacity of generator sets, has been widely used in stationary generator sets and emergency mobile power vehicles. Specifically, the basic principle of parallel operation is quasi-synchronization. It requires adjusting the speed and voltage of each generator set according to their voltage and frequency. After the adjustment is consistent, the phase angle is captured, and quasi-synchronous closing and parallel operation are performed. After parallel operation, the load is distributed proportionally according to the capacity of each generator set. Since the parallel operation process relies on the mutual acquisition of status information between the generator sets, and the status of the generator sets is mainly concentrated in their respective controllers, it is required that the controllers of the generator sets can communicate with each other to complete quasi-synchronous adjustment and load distribution.

[0003] However, in practical applications, it is difficult for controllers configured with different generator sets to communicate directly, which leads to obstacles in parallel operation. Specifically, because the controllers cannot effectively exchange their respective operating status parameters, key data such as voltage, frequency, and phase angle required in the quasi-synchronous regulation process cannot be shared in real time, thus affecting the accuracy of parallel closing and the balance of load distribution. In addition, when the number of generator sets increases or multi-level parallel operation is involved, the communication obstacles are further aggravated, making it difficult to meet the requirements of real-time and consistency of data transmission for multi-unit collaborative control. This limitation also affects the parallel operation of large users with multiple power generation equipment, especially the implementation of cross-regional multi-level parallel operation. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides a generator set parallel operation communication conversion device and control method, which solves the technical problem that it is difficult for controllers configured in different generator sets to achieve direct communication, resulting in obstacles to parallel operation.

[0005] The present invention provides a generator set parallel communication conversion device, comprising: multiple generator sets, wherein a generator set controller is provided within each generator set; Protocol converters are connected to the controllers of the various power generation devices, respectively. The protocol converter includes: The protocol automatic identification module is used to automatically identify the protocol type of communication signals sent by multiple power generation device controllers according to a preset protocol feature library; The protocol semantic conversion module is used to convert the same physical quantity parameters under different protocol types into a standard format based on preset semantic conversion rules, and to perform parameter address mapping.

[0006] Optionally, there are multiple protocol converters; each protocol converter has a first communication interface and a second communication interface, wherein the first communication interface is connected to the controller of the current power generation device, and the second communication interface is connected to the controller of the next-level power generation device and the first communication interface of the next-level protocol converter, and the multiple protocol converters are cascaded in sequence through a CAN bus to form a cascaded structure.

[0007] Optionally, in the cascaded structure, a synchronization clock signal module is provided between two adjacent protocol converters to maintain the data transmission timing consistency between the two adjacent protocol converters.

[0008] Optionally, the protocol converter further includes a conflict detection module, which, when a CAN bus data conflict is detected, prioritizes the transmission of high-priority power generation device status parameters, and resumes the transmission of low-priority power generation device status parameters after the conflict is resolved.

[0009] Optionally, the number of protocol converters is one; the protocol converter has multiple communication interfaces, and the protocol converter is connected to multiple power generation device controllers through the multiple communication interfaces respectively.

[0010] Optionally, the power generation device further includes: a power generation device speed regulation module and a power generation device voltage regulation module; the power generation device speed regulation module and the power generation device voltage regulation module are respectively connected to the power generation device controller via connecting conductors.

[0011] Optionally, the protocol converter further includes a communication stability control module for monitoring and handling abnormal states during the communication process, wherein the abnormal states include delay, packet loss, and jitter.

[0012] Optionally, the communication stability control module includes: a delay processing unit, which is equipped with a data buffer queue, used to prioritize sending the latest power generation device status parameters when the communication delay exceeds a preset time; a packet loss processing unit, used to trigger a retransmission command when packet loss is detected, and to issue an alarm signal and switch to a backup communication link when retransmission fails; and a jitter processing unit, used to smooth the received power generation device status parameters based on a digital filtering algorithm and filter high-frequency jitter signals.

[0013] Another aspect of the present invention provides a control method for a generator set parallel operation communication conversion device, implemented using the generator set parallel operation communication conversion device described in any of the preceding claims, comprising: The protocol converter's automatic protocol identification module is used to identify the protocol types of the communication signals of the multiple power generation device controllers connected to the protocol converter. Using the protocol semantic conversion module of the protocol converter, the corresponding semantic conversion rules are called based on the communication protocol type to convert the same physical quantity parameters under different protocol types into a standard format and perform parameter address mapping; After conversion and mapping, the physical quantity parameters are communicated among the controllers of multiple power generation devices, enabling multiple power generation devices to complete parallel synchronization regulation and load distribution.

[0014] Optionally, when there are multiple protocol converters and multiple protocol converters are used in cascade, the upper-level protocol converter generates a synchronization clock signal and sends it to the lower-level protocol converter. The lower-level protocol converter calibrates its own clock according to the received synchronization clock signal, so that the sampling frequency and data transmission timing of each level of protocol converter are consistent.

[0015] The generator set parallel operation communication conversion device and control method provided by this invention establishes a communication channel between different controllers at the physical level by setting a protocol converter to connect to multiple generator set controllers. The protocol converter's automatic protocol identification module can automatically identify the communication protocol type used by each controller without manual intervention. After identification, the protocol semantic conversion module converts the same physical quantity parameters under different protocol types into a unified standard format and performs parameter address mapping. This enables controllers that could not communicate directly due to protocol differences to achieve effective interaction of status parameters through the protocol converter, solving the technical barrier of direct communication between different controllers. On this basis, the key parameters after unification can be shared to each controller in real time, supporting the execution of quasi-synchronous regulation and parallel operation. At the same time, the protocol converter has scalability, allowing access to multiple generator sets without modifying the original controllers, and opening up communication between generator sets in different regions and at different levels. In complex scenarios such as increased number of generator sets, multi-level parallel operation, and cross-regional parallel operation, it alleviates communication barriers and provides basic communication support for large-scale, cross-regional parallel operation. The aforementioned device enables physical connection and logical communication between controllers of different power generation devices through a protocol converter. It achieves effective interaction of key operating status parameters through automatic protocol identification and semantic conversion. The unified parameter format improves the accuracy of parallel operation and the balance of load distribution, enhances system scalability, and supports cross-regional parallel operation.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of the overall structure of the generator set parallel communication conversion device in one embodiment of this application; Figure 2 A schematic diagram of the overall structure of the generator set parallel communication conversion device provided in this application when the number of protocol converters is multiple; Figure 3 A schematic diagram of the overall structure of the generator set parallel communication conversion device provided in this application when the number of protocol converters is one; Figure 4 This is a schematic diagram of the internal logic of the generator set parallel communication conversion device in one embodiment of the present application when the number of protocol converters is one.

[0019] In the picture: 1. Generator unit; 101. Generator unit controller; 102. Generator unit speed control module; 103. Generator unit voltage regulation module; 2. Protocol converter; CAN1, first communication interface; CAN2, second communication interface; CAN3, CAN4, CAN5, communication interfaces. Detailed Implementation

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] This invention provides a generator set parallel communication conversion device, such as... Figure 1 As shown, it includes: multiple power generation devices 1, each power generation device 1 having a power generation device controller 101; and a protocol converter 2, which is connected to the multiple power generation device controllers 101 respectively. The protocol converter 2 includes: an automatic protocol identification module, used to automatically identify the protocol type of the communication signals sent by the multiple power generation device controllers 101 according to a preset protocol feature library; and a protocol semantic conversion module, used to convert the same physical quantity parameters under different protocol types into a standard format based on preset semantic conversion rules, and to perform parameter address mapping.

[0024] The generator parallel communication conversion device provided by this invention establishes a communication channel between different controllers at the physical level by setting a protocol converter 2 connected to multiple generator controllers 101. The protocol automatic identification module in the protocol converter 2 can automatically identify the communication protocol type used by each controller without manual intervention. After identification, the protocol semantic conversion module converts the same physical quantity parameters under different protocol types into a unified standard format and performs parameter address mapping. This enables controllers that could not communicate directly due to protocol differences to achieve effective interaction of status parameters through the protocol converter 2, solving the technical barrier of direct communication between different controllers. On this basis, the key parameters after unification can be shared to each controller in real time, supporting the execution of quasi-synchronous regulation and parallel operation. At the same time, the protocol converter 2 has scalability and can connect to multiple generators 1 without modifying the original controllers, opening up communication between generators 1 in different regions and at different levels. In complex scenarios such as increased number of generators, multi-level parallel operation, and cross-regional parallel operation, it alleviates communication barriers and provides basic communication support for large-scale, cross-regional parallel operation. The aforementioned device enables physical connection and logical communication between different power generation device controllers 101 through protocol converter 2. It achieves effective interaction of key operating status parameters through automatic protocol identification and semantic conversion. The unified parameter format improves the accuracy of parallel operation and the balance of load distribution, enhances system scalability, and supports cross-regional parallel operation.

[0025] Specifically, in the above embodiments, the number of protocol converters 2 is multiple; such as Figure 2 As shown, the protocol converter 2 has a first communication interface CAN1 and a second communication interface CAN2. The first communication interface CAN1 is connected to the current level power generation device controller 101, and the second communication interface CAN2 is connected to the next level power generation device controller 101 and the first communication interface CAN1 of the next level protocol converter 2. Multiple protocol converters 2 are cascaded sequentially through the CAN bus to form a cascaded structure.

[0026] In this embodiment, multiple protocol converters 2 are provided, and each protocol converter 2 has two communication interfaces, named first communication interface CAN1 and second communication interface CAN2, respectively. The first communication interface CAN1 of each protocol converter 2 is connected to the current-level power generation controller 101, while the second communication interface CAN2 connects to two objects simultaneously: the next-level power generation controller 101 and the first communication interface CAN1 of the next-level protocol converter 2. The second communication interface CAN2 of the next-level power generation controller 101 is then connected to the first communication interface CAN1 of the next-next-level power generation controller 101, and so on. Multiple protocol converters 2 are cascaded sequentially via a CAN bus to achieve multi-level expansion. Compared to a single multi-channel protocol converter 2, the cascaded structure allows for greater flexibility in the operation of the protocol converters 2. The number of converters can be flexibly increased or decreased according to the number of generator sets, providing excellent scalability. It is particularly suitable for scenarios with a large number of generator sets or those requiring gradual expansion. Each protocol converter 2 only needs to handle the signal conversion of its own level and the next-level generator controller 101, avoiding the processing bottleneck that may occur when a single converter connects to too many generator controllers 101, and distributing the communication load. The cascaded structure supports distributed deployment, and each level of protocol converter 2 can be installed near the corresponding generator 1, reducing the complexity of long-distance wiring and the risk of signal attenuation. Each level of protocol converter 2 connects to the next-level controller and the next-level converter simultaneously through the second communication interface CAN2, realizing the reuse of the controller access and cascade communication interfaces. Multi-level expansion is completed without increasing the number of communication interfaces, providing a flexible and reliable communication conversion architecture for large-scale cross-regional multi-level parallel operation.

[0027] Each CAN communication interface of the protocol converter 2 integrates an automatic protocol identification module. The module has a pre-set protocol feature library containing feature codes of mainstream power generation device controller communication protocols, including protocol feature parameters such as baud rate, frame format, and start flag. The automatic protocol identification module performs real-time analysis on the initial handshake signal sent by the connected power generation device controller, extracts the protocol feature parameters from the signal, and compares the extracted feature parameters with the feature codes in the protocol feature library one by one, thereby realizing automatic identification of the communication protocol type. According to the test, the protocol identification module provided in this application has a protocol identification time of ≤100ms and an identification accuracy of ≥99%. After the identification is completed, the automatic protocol identification module automatically calls the parsing algorithm corresponding to the protocol type. The entire process can complete the protocol adaptation without manual intervention, laying the foundation for subsequent semantic conversion.

[0028] Furthermore, in the cascaded structure, a synchronization clock signal module is provided between two adjacent protocol converters 2 to maintain the consistency of data transmission timing between the two adjacent protocol converters 2.

[0029] In this embodiment, a synchronization clock signal module is provided between adjacent protocol converters 2 to maintain consistent data transmission timing between adjacent protocol converters 2. Specifically, in scenarios where multiple protocol converters 2 are cascaded, since each level of converter operates independently, there may be slight deviations in their internal clocks. As data is transmitted level by level in the cascaded link, these deviations accumulate and amplify, causing misalignment of the sampling time and data transmission timing of each level of converter, which in turn leads to data transmission errors or packet loss. Based on this, a synchronization clock signal module is provided between adjacent protocol converters 2. The previous level protocol converter 2 generates a synchronization clock signal and sends it to the next level protocol converter 2. The next level protocol converter 2 calibrates its own operating clock according to the received synchronization clock signal, thereby synchronizing with the clock of the previous level protocol converter 2. Through the synchronization mechanism, the sampling frequency and data transmission timing of each level of protocol converter 2 are kept consistent, eliminating the cumulative effect of clock deviation in the cascaded link, ensuring the synchronization and reliability of data transmission in multi-level expansion scenarios, and providing a stable timing foundation for large-scale parallel operation.

[0030] Furthermore, the protocol converter 2 also includes a conflict detection module, which, when a CAN bus data conflict is detected, prioritizes the transmission of high-priority power generation device status parameters, and resumes the transmission of low-priority power generation device status parameters after the conflict is resolved.

[0031] In this embodiment, when multiple protocol converters 2 are cascaded or a single protocol converter 2 is connected to multiple controllers, multiple power generation device controllers 101 may simultaneously send data to the CAN bus. When two or more nodes send data simultaneously, a bus data conflict will occur, leading to data corruption or loss. Based on this, a conflict detection module is integrated into the protocol converter 2, specifically employing a CSMA / CD (Carrier Sense Multiple Access / Conflict Detection) mechanism to monitor the CAN bus level status in real time. When an abnormal bus level is detected, indicating a data conflict, the conflict detection module immediately prioritizes the power generation device status parameters to be transmitted. Among them, real-time parameters directly related to parallel quasi-synchronous regulation are set to high priority, such as voltage, frequency, and phase angle, while non-real-time data such as historical status query data and log information are set to low priority. The conflict detection module prioritizes the transmission of high-priority generator status parameters to ensure that the key data required for parallel regulation can be delivered as soon as possible. After the conflict is resolved, the transmission of low-priority parameters is restored in the queue order. Based on this, the CAN bus data conflict problem is effectively solved. While ensuring the real-time performance and accuracy of parallel regulation, the complete transmission of non-real-time data is also taken into account, which improves the robustness and reliability of the communication system in multi-unit parallel operation scenarios.

[0032] Specifically, in the above embodiments, the number of protocol converters 2 is one; such as Figure 4 As shown, the protocol converter 2 has multiple communication interfaces, namely CAN4, CAN5 and CAN6; the protocol converter 2 is connected to multiple power generation device controllers 101 through the multiple communication interfaces.

[0033] In this embodiment, a single multi-channel protocol converter 2 is used to centrally connect multiple generator controllers 101. Each generator controller 101 is connected to the same protocol converter 2 through an independent communication interface. Using a single multi-channel protocol converter 2 eliminates the need to establish cascading relationships and synchronous clock signals between multiple converters, resulting in a simpler overall structure and more convenient deployment. This is suitable for scenarios where the number of generator sets is relatively fixed and installation space is limited. At the same time, the protocol converter 2 also integrates an automatic protocol identification module and a protocol semantic conversion module, which performs protocol identification and semantic conversion for each controller connected to each interface, ensuring that controllers with different protocol types can communicate and recognize each other through the same converter. The configuration of a single multi-channel protocol converter 2 reduces the number of devices and connection complexity, lowers system deployment costs and potential failure points, and provides an intensive solution for parallel operation of small and medium-sized generator sets.

[0034] After completing protocol type identification, the protocol semantic conversion module is responsible for achieving data interoperability between different protocols. Taking three-channel CAN communication as an example, each CAN channel corresponds to five core parameters, including voltage, frequency, speed, load rate, and phase angle. Based on this, this application not only implements the address mapping of each parameter through software programming, but also presets exclusive protocol semantic conversion rules for different expressions of the same physical quantity in different protocols. For example, for the physical quantity of frequency, Manufacturer A's protocol uses hexadecimal floating-point format, while Manufacturer B's protocol uses decimal integer format. If only address mapping is performed without format conversion, it will lead to data misunderstanding or control deviation. Based on this, the semantic conversion module performs real-time conversion of data in different formats, uniformly converting it to standard floating-point format and retaining two decimal places. After format unification, address mapping is performed. In the specific parameter correspondence, such as... Figure 4 As shown, parameter 16 of CAN4 corresponds to parameter 27 of CAN5 and parameter 39 of CAN6. The format is automatically standardized during the conversion process to ensure consistency and accuracy of the same physical quantity under different protocols. Other core parameters are also handled according to... Figure 4 The corresponding relationship shown is transformed by combining the preset semantic transformation rules. Through the collaborative work of protocol recognition and semantic transformation, this application realizes seamless communication between power generation device controllers of different manufacturers and different protocol types.

[0035] Specifically, in the above embodiments, such as Figure 2 and Figure 3 As shown, the power generation device 1 also includes: a power generation device speed regulation module 102 and a power generation device voltage regulation module 103; the power generation device speed regulation module 102 and the power generation device voltage regulation module 103 are respectively connected to the power generation device controller 101 through connecting conductors.

[0036] In this embodiment, each power generation device 1 includes not only a power generation device controller 101, but also a power generation device speed regulation module 102 and a power generation device voltage regulation module 103. The power generation device speed regulation module 102 is used to regulate the speed of the power generation device 1 and thus adjust the output frequency, while the power generation device voltage regulation module 103 is used to regulate the output voltage of the power generation device. The power generation device speed regulation module 102 and the power generation device voltage regulation module 103 are respectively connected to the power generation device controller 101 through connecting conductors and receive control commands from the power generation device controller 101. Based on the above connection relationship, after the protocol converter 2 completes the communication protocol conversion between different controllers, each power generation device controller 101 can obtain the operating status parameters such as voltage and frequency of other units, and then issue corresponding adjustment commands to the speed regulation module and voltage regulation module of its own unit to adjust the speed and voltage respectively, so that the voltage and frequency of each unit tend to be consistent, and finally meet the quasi-synchronous parallel operation conditions. This provides physical execution layer support for parallel quasi-synchronous regulation, so that after the protocol converter 2 opens the communication link, each power generation device 1 has the ability to actually execute the adjustment commands to realize the physical layer parallel operation.

[0037] Specifically, in the above embodiments, the protocol converter 2 further includes a communication stability control module, which is used to monitor and process abnormal states during the communication process, wherein the abnormal states include delay, packet loss and jitter.

[0038] Furthermore, the communication stability control module includes: a delay processing unit with a data buffer queue, which prioritizes sending the latest power generation device status parameters when the communication delay exceeds a preset time; a packet loss processing unit, which triggers a retransmission command when packet loss is detected, issues an alarm signal and switches to a backup communication link when retransmission fails; and a jitter processing unit, which smooths the received power generation device status parameters based on a digital filtering algorithm and filters out high-frequency jitter signals.

[0039] In this embodiment, during parallel operation, the stability of the communication link directly affects the real-time performance of quasi-synchronous adjustment and the accuracy of load distribution. To address abnormal states such as delay, packet loss, and jitter that may occur during parallel communication, a communication stability control module is further integrated into the protocol converter 2. The module specifically includes a delay processing unit, a packet loss processing unit, and a jitter processing unit, which monitor and process the above three types of abnormal states respectively.

[0040] The delay processing unit is equipped with a data buffer queue with a buffer capacity of ≥100 frames. The communication stability control module monitors the data transmission status in real time. When the communication delay is detected to exceed the preset time, preferably 50ms, the delay processing unit immediately starts the data buffer queue and stores the received parameter data into the queue in chronological order. When sending data, the delay processing unit prioritizes sending the latest power generation device status parameters in the queue to ensure that the real-time data required for quasi-synchronous regulation can be delivered as soon as possible, avoiding regulation lag due to the delayed transmission of old data. This ensures that the real-time requirements of parallel regulation can still be guaranteed even under the condition of communication delay.

[0041] The packet loss handling unit employs a CRC cyclic redundancy check mechanism to perform integrity checks on each transmitted data frame. When the packet loss handling unit detects data loss through CRC check, it immediately triggers a retransmission command to the sending end, requesting the sending end to retransmit the lost data frame. The maximum number of retransmissions is 3. If the data is successfully received within 3 retransmissions, communication returns to normal. If the data is still not successfully received after 3 retransmissions, the packet loss handling unit issues an audible and visual alarm signal through the alarm module to alert the operator that there is an anomaly in the current communication link and automatically switches to the backup CAN communication link to ensure uninterrupted communication. By establishing a packet loss detection and recovery mechanism, the integrity of communication data and the continuity of the communication link are effectively guaranteed.

[0042] The jitter processing unit employs a digital filtering algorithm to smooth the received power generation device status parameters, thereby filtering out high-frequency jitter signals. Taking frequency parameters as an example, the jitter processing unit uses a moving average filtering algorithm with a preferred window size of 5. It averages multiple continuously received frequency values ​​to eliminate interference caused by instantaneous fluctuations, ensuring that the fluctuation amplitude of parameter data is controlled within 0.05Hz. Through smoothing, it provides stable and reliable data for parallel quasi-synchronous regulation and load distribution, avoiding malfunctions in regulation caused by parameter jitter.

[0043] Another aspect of the present invention provides a control method for a generator set parallel communication conversion device, implemented using the generator set parallel communication conversion device as described above, comprising: using the protocol automatic identification module of the protocol converter 2 to identify the protocol type of the communication signals of the multiple generator set controllers 101 connected to the protocol converter 2 respectively; using the protocol semantic conversion module of the protocol converter 2 to call the corresponding semantic conversion rules based on the communication protocol type, converting the same physical quantity parameters under different protocol types into a standard format, and performing parameter address mapping; the physical quantity parameters after conversion and mapping communicate between the multiple generator set controllers 101, enabling the multiple generator sets to complete parallel quasi-synchronous regulation and load distribution.

[0044] The control method for the generator set parallel communication conversion device provided by this invention achieves rapid and accurate identification of the protocol types of controllers from different manufacturers through an automatic protocol identification step, completing protocol adaptation without manual intervention; through protocol semantic conversion, it unifies the same physical quantity parameters under different protocols into a standard format and performs address mapping, breaking down data barriers between different protocols; after conversion and mapping, key parameters such as voltage, frequency, and phase angle can be shared in real time among multiple generator set controllers 101, enabling generator sets that were originally unable to communicate directly due to protocol differences to complete parallel quasi-synchronous regulation and load distribution; the above method has the advantages of simple operation, strong adaptability, and no need to modify the original controller, effectively solving the technical problem of the inability to operate generator set controllers of different brands in parallel.

[0045] Specifically, in the above embodiments, when there are multiple protocol converters 2 and multiple protocol converters 2 are used in cascade, the upper-level protocol converter 2 generates a synchronization clock signal and sends it to the lower-level protocol converter 2. The lower-level protocol converter 2 calibrates its own clock according to the received synchronization clock signal, so that the sampling frequency and data transmission timing of each level of protocol converter 2 are consistent.

[0046] In this embodiment, a synchronization clock signal is generated by the upper-level protocol converter 2 and sent to the lower-level protocol converter 2, so that the lower-level protocol converter 2 can calibrate its own clock accordingly. This ensures that the sampling frequency and data transmission timing of each level of protocol converter 2 are consistent. The establishment of a synchronization mechanism effectively eliminates the cumulative effect of clock deviation in multi-level cascaded scenarios, avoids data transmission errors caused by timing misalignment, and provides a stable and reliable timing synchronization foundation for large-scale, multi-level parallel operation.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A generator set parallel operation communication conversion device, characterized in that, include: Multiple power generation devices (1), each power generation device (1) is equipped with a power generation device controller (101); Protocol converters (2) are connected to multiple generator controllers (101) respectively; The protocol converter (2) includes: The protocol automatic identification module is used to automatically identify the protocol type of the communication signals sent by the multiple power generation device controllers (101) according to a preset protocol feature library; The protocol semantic conversion module is used to convert the same physical quantity parameters under different protocol types into a standard format based on preset semantic conversion rules, and to perform parameter address mapping.

2. The generator set parallel communication conversion device according to claim 1, characterized in that, The number of protocol converters (2) is multiple; The protocol converter (2) is provided with a first communication interface and a second communication interface. The first communication interface is connected to the local power generation device controller (101), and the second communication interface is connected to the next-level power generation device controller (101) and the first communication interface of the next-level protocol converter (2). The multiple protocol converters (2) are connected in series via CAN bus to form a cascaded structure.

3. The generator set parallel communication conversion device according to claim 2, characterized in that, In the cascaded structure, a synchronization clock signal module is provided between two adjacent protocol converters (2) to keep the data transmission timing of the two adjacent protocol converters (2) consistent.

4. The generator set parallel communication conversion device according to claim 3, characterized in that, The protocol converter (2) further includes: The conflict detection module is used to prioritize the transmission of high-priority power generation device status parameters when a data conflict is detected on the CAN bus, and resume the transmission of low-priority power generation device status parameters after the conflict is resolved.

5. The generator set parallel communication conversion device according to claim 1, characterized in that, The number of protocol converters (2) is one; The protocol converter (2) has multiple communication interfaces, and the protocol converter (2) is connected to multiple power generation device controllers (101) through the multiple communication interfaces respectively.

6. The generator set parallel communication conversion device according to claim 1, characterized in that, The power generation device (1) further includes: a power generation device speed regulation module (102) and a power generation device voltage regulation module (103); The power generation device speed regulation module (102) and the power generation device voltage regulation module (103) are respectively connected to the power generation device controller (101) via connecting conductors.

7. The generator set parallel communication conversion device according to claim 1, characterized in that, The protocol converter (2) further includes: The communication stability control module is used to monitor and handle abnormal states during the communication process, including delay, packet loss, and jitter.

8. The generator set parallel communication conversion device according to claim 7, characterized in that, The communication stability control module includes: The delay processing unit is equipped with a data buffer queue, which is used to prioritize sending the latest power generation device status parameters when the communication delay exceeds a preset time. The packet loss processing unit is used to trigger a retransmission command when packet loss is detected, and to issue an alarm signal and switch to a backup communication link when retransmission fails. The jitter processing unit is used to smooth the received power generation device status parameters based on a digital filtering algorithm and filter high-frequency jitter signals.

9. A control method for a generator set parallel communication conversion device, characterized in that, Implemented using the generator set parallel communication conversion device as described in any one of claims 1 to 8, comprising: Using the protocol automatic identification module of the protocol converter (2), the protocol type of the communication signals of the multiple power generation device controllers (101) connected to the protocol converter (2) is identified respectively; Using the protocol semantic conversion module of the protocol converter (2), the corresponding semantic conversion rules are called based on the communication protocol type to convert the same physical quantity parameters under different protocol types into standard format and perform parameter address mapping; After conversion and mapping, the physical quantity parameters are communicated among the multiple power generation device controllers (101), enabling the multiple power generation devices to complete parallel quasi-synchronous regulation and load distribution.

10. The method according to claim 9, characterized in that, When there are multiple protocol converters (2) and multiple protocol converters (2) are used in cascade, the upper-level protocol converter (2) generates a synchronization clock signal and sends it to the lower-level protocol converter (2). The lower-level protocol converter (2) calibrates its own clock according to the received synchronization clock signal, so that the sampling frequency and data transmission timing of each level of protocol converter (2) are consistent.

Images