A control structure and method based on cascade transformer high voltage platform

Abstract

The present invention relates to a control structure and method based on a cascade transformer high-voltage platform, the control structure including a communication unit and high-voltage module controllers at various levels arranged inside the high-voltage platform; the communication unit adopts a passive optical splitter, the passive optical splitter is respectively connected to the high-voltage module controllers at various levels through multi-path optical fibers, the passive optical splitter also passes through the high-voltage platform and is connected to external communication, the passive optical splitter is used to realize data communication and control instruction transmission inside and outside the high-voltage platform; each high-voltage module controller is connected to the high-voltage module corresponding to the high-voltage platform, for controlling the target voltage of the corresponding high-voltage module. The present invention has no effect on the grading ring, and has a high communication rate and stable performance.

Description

Technical Field

[0001] The present invention relates to a control structure and method based on a cascade transformer high-voltage platform, and relates to the technical field of transformers. Background Art

[0002] With the growth of industrial demand and technological advancements, the demand for high-voltage, high-power high-voltage platforms is increasing. Traditional voltage-doubling high-voltage platforms no longer meet these requirements in terms of power, ripple, and other technical indicators. This has led to the development of high-voltage platforms based on cascaded transformers.

[0003] While high-voltage platforms based on cascaded transformers offer high power and low ripple, they are difficult to control. The lack of mature, stable control structures and methods has hindered their widespread application. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, in response to the above-mentioned problem, the present invention aims to provide a control structure and method based on a cascade transformer high-voltage platform, which can enable each high-voltage module in the high-voltage platform to achieve a communication rate of more than 500Mb / s.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a control structure based on a cascade transformer high-voltage platform, the control structure comprising a communication unit and high-voltage module controllers at each level arranged inside the high-voltage platform;

[0007] The communication unit adopts a passive optical splitter, which is connected to the high-voltage module controllers at each level through multiple optical fibers. The passive optical splitter also passes through the high-voltage platform to communicate with the outside world. The passive optical splitter is used to realize data communication and control command transmission inside and outside the high-voltage platform;

[0008] Each of the high-voltage module controllers is connected to a corresponding high-voltage module of the high-voltage platform and is used to control a target voltage of the corresponding high-voltage module.

[0009] Furthermore, the passive optical splitter is connected to the external communication by passing through the high voltage platform through an aviation plug.

[0010] Furthermore, each level of the high-voltage module controller and the corresponding high-voltage module are powered by a corresponding isolation transformer.

[0011] Furthermore, each of the high-voltage module controllers is implemented using FPGA, and in each level of the high-voltage module controllers, the FPGA is programmed into multiple logic processors to implement high-voltage control.

[0012] Furthermore, each level of the high-voltage module controller includes a main control logic processor, a communication processor, an interlocking protection processor, an analog signal processor and a feedback control processor, wherein:

[0013] The communication processor is configured to enable the main control logic processor to communicate and / or transmit data with an external communication device;

[0014] The interlocking protection processor is configured to obtain the interlocking status of the internal equipment of the high-voltage platform;

[0015] The analog signal processor is configured to control the ADC / DAC to collect and output analog signals;

[0016] The feedback control processor is configured to process the signal collected by the analog signal processor through hardware digital PID high-speed processing to output a target voltage value;

[0017] The main control logic processor sends PID parameters and voltage target parameters to the feedback control processor according to external instructions and interlocking status, and the feedback control processor sends the target voltage value to the high-voltage module of the corresponding level through the analog signal processor to output the target high-voltage signal.

[0018] Furthermore, the high-voltage module controller also includes a PON Stick module, and the communication processor transmits signals through the PON Stick module.

[0019] Furthermore, each of the optical fibers extends from the lower layer to the upper layer along the transformer tunnel in the center of the high-voltage platform, and after reaching the corresponding layer, turns into and is inserted into the PON Stick module of the high-voltage module controller.

[0020] In a second aspect, the present invention further provides a control method based on a control structure of a cascade transformer high-voltage platform, comprising:

[0021] The external control system sends a signal to each level of high-voltage module controller inside the high-voltage platform, and each level of high-voltage module controller sends a feedback signal to confirm whether the corresponding equipment is in normal operation;

[0022] The external control system sends the target parameters to the high-voltage module controller in normal working state according to the feedback results of the high-voltage module controller, and sends them to the high-voltage platform through the passive optical splitter;

[0023] After receiving the corresponding target parameters, the high-voltage controllers at each level inside the high-voltage platform send the data to the high-voltage modules at the corresponding level, ultimately making the entire high-voltage platform operate at the target voltage.

[0024] Furthermore, after receiving the corresponding target parameters, the high-voltage controllers at each level within the high-voltage platform send data to the high-voltage modules at the corresponding level, ultimately making the entire high-voltage platform operate at the target voltage, including:

[0025] The main control logic processor of each level of high-voltage controller calculates the actual output parameters and PID parameters based on the equipment parameters, and sends the data to the feedback control processor of the high-voltage controller. The feedback control processor of the high-voltage controller outputs the corresponding analog signal of the target high voltage to the high-voltage module of the corresponding level through the analog signal processor of the high-voltage controller. Finally, the entire high-voltage platform operates at the target voltage.

[0026] Furthermore, the data of the external control system is packaged by the TCP protocol and the IP protocol and then sent to the external optical splitter network terminal of the high-voltage platform. The data is then packaged again on the optical splitter network terminal to add a GEM frame header, so that the data is transmitted to the high-voltage controllers at all levels inside the high-voltage platform through the passive optical splitter. After the data is sent to the high-voltage module controller through the passive optical splitter, it is unpacked step by step through its internal communication processor to remove the packet header and send the data to the main control logic processor of the high-voltage module controller for execution.

[0027] The present invention adopts the above technical solution, which has the following characteristics:

[0028] 1. The present invention uses a passive optical splitter as the center of data exchange for the entire platform, eliminating switches, wireless base stations and other equipment, making the connection simple and reliable. Through specific wiring and routing methods, it avoids affecting the voltage-equalizing ring. The controller FPGA resources that match it are developed into multiple processor soft cores, which can parse and process the instructions sent by the passive optical splitter. This structure has no effect on the voltage-equalizing ring, and has a high communication rate and stable performance.

[0029] 2. The control structure of the present invention can greatly simplify the wiring complexity of the control system without affecting the voltage-equalizing ring, thereby improving the communication speed of the control system and shortening the response time.

[0030] 3. The present invention designs a high-voltage controller for the high-voltage module inside the cascade transformer high-voltage platform. The controller implements various control logic requirements by programming the FPGA, greatly simplifying the high-voltage control connection inside the platform.

[0031] 4. The passive optical splitter used in the present invention avoids the risk of high voltage sparking and high voltage current being conducted on each level of high voltage modules.

[0032] In summary, the present invention is significantly different from the traditional voltage-doubling high-voltage platform. The control structure and method are applied to the high-voltage platform based on the cascade transformer and can be widely used in the control of equipment such as electron accelerators and high-power electron guns. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0034] Figure 1 This is a diagram of the high-voltage platform control structure according to an embodiment of the present invention;

[0035] Figure 2 This is a logic diagram of the n-th level high voltage module controller according to an embodiment of the present invention;

[0036] Figure 3 This is a data packaging and transmission method according to an embodiment of the present invention;

[0037] Figure 4 This is an internal wiring structure of an optical fiber of an optical splitter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0040] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inner side," "outer side," "lower," "upper," etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0041] Due to the problem that the high-voltage platform based on the cascade transformer is difficult to control. The present invention provides a control structure and method for the high-voltage platform based on the cascade transformer, the control structure includes a communication unit and high-voltage module controllers at each level arranged inside the high-voltage platform; the communication unit adopts a passive optical splitter, and the passive optical splitter is respectively connected to the high-voltage module controllers at each level through multiple optical fibers. The passive optical splitter also passes through the high-voltage platform and is connected to the external communication. The passive optical splitter is used to realize data communication and control instruction transmission inside and outside the high-voltage platform; each high-voltage module controller is connected to the corresponding high-voltage module of the high-voltage platform, and is used to control the target voltage of the corresponding high-voltage module. The present invention has no effect on the grading ring, and has a high communication rate and stable performance. Moreover, the present invention can also be expanded according to the number of cascade transformers, and is theoretically not limited by quantity. At the same time, its protocol is compatible with traditional Ethernet and can be quickly connected to the existing network system.

[0042] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0043] The high-voltage platform based on cascade transformers is mainly used in scenarios requiring high power and low ripple, such as high-current electron accelerators and high-current electron cooling systems. Its main structure includes cascade transformers, high-voltage power modules at various levels, high-voltage control and regulation equipment, communication equipment, and master control equipment.

[0044] like Figure 1 As shown, the control structure based on the cascade transformer high-voltage platform provided in this embodiment includes a communication unit and high-voltage module controllers of each level arranged inside the platform.

[0045] The communication unit utilizes a passive optical splitter 1, which facilitates data communication and control command issuance within and outside the platform. Passive optical splitter 1 connects to n levels of high-voltage module controllers 3 within the platform via multiple optical fibers 2. Each level of high-voltage module controller 3 is connected to a corresponding high-voltage module 4 to prevent cross-current leakage. A single optical fiber 2 simultaneously transmits and receives data through wavelength division multiplexing.

[0046] The passive optical splitter 1 is also connected to the outside through the aviation plug 4 and passed through the protective container 6 of the high-voltage platform.

[0047] In a preferred embodiment, the passive optical splitter 1 can also be connected to other devices inside the high-voltage platform through multiple optical fibers 2, which is not limited here.

[0048] In a preferred embodiment, each level of high-voltage module controller 3 and the corresponding high-voltage module 4 are powered by a corresponding transformer 7 . The transformer 7 in this embodiment can be an isolation transformer.

[0049] In a preferred embodiment, Figure 2 As shown, the high-voltage module controller 3 can be implemented using FPGA. In each level of the high-voltage module controller 3, the FPGA is programmed as multiple logic processors. Multiple soft-core processors are implemented through FPGA programming to achieve the purpose of high-voltage module control.

[0050] Furthermore, each level of high-voltage module controller 3 includes a main control logic processor 31, a communication processor 32, an interlocking protection processor 33, an analog signal processor 34, and a feedback control processor 35. The main control logic processor 31 exchanges data with each processor via the AMBA bus. The data format complies with the AXI protocol. Through the coordinated work of the above processors, the high-voltage modules at each level can output stable high-voltage current, and ultimately the entire high-voltage platform can output stable high-voltage current.

[0051] The communication processor 32 is configured to enable the main control logic processor to communicate and / or transmit data with an external communication device;

[0052] The interlock protection processor 33 is configured to obtain the interlock status of the internal equipment of the high-voltage platform;

[0053] The analog signal processor 34 is configured to control the ADC / DAC to collect and output analog signals;

[0054] The feedback control processor 35 is configured to process the signal collected by the analog signal processor 34 at high speed through hardware digital PID to achieve stable output of high voltage. Among them, this processor controls the voltage to achieve constant voltage. For example, a feedback calculation can be completed in 10ns. This is an example, not limited to this, and the feedback calculation time can be set as needed.

[0055] The main control logic processor 31 sends PID parameters and voltage target parameters to the feedback control processor according to external instructions and interlocking status. The feedback control processor 35 sends the target voltage signal to the high-voltage module 4 of the corresponding level through the analog signal processor 34 to output the target high-voltage signal.

[0056] Furthermore, the high-voltage module controller 3 further includes a PON Stick (communication) module 36 , and the communication processor 32 transmits signals through the PON Stick module 36 .

[0057] In a preferred embodiment, the entire data exchange is as follows Figure 3 As shown, the internal and external signal transmission methods of data include:

[0058] The control data from the application layer of the external control system is packaged using the TCP protocol at the transport layer and the IP protocol at the network layer before being sent to the optical splitter network terminal outside the high-voltage platform. There, it undergoes secondary packaging, adding a GEM frame header, allowing the data to be transmitted through the passive optical splitter 1 to the high-voltage module controllers 4 at each level within the high-voltage platform. After the data is sent to the high-voltage module controllers 3 via the passive optical splitter 1, it is unpacked level by level by the communication processor 32, removing the headers. Ultimately, only the data remains, which is then sent to the main control logic processor 31 for execution.

[0059] The optical network terminal further repacks the data, primarily by adding a GEM frame header. As shown in Table 1, the payload is the data to be encapsulated, and the first 40 bits are the frame header. This data is converted to the PON network format and ultimately sent and processed via passive optical splitter 1. Wavelength division multiplexing (WDM) ensures full-duplex operation on a single fiber.

[0060] Table 1 GEM frame format

[0061]

[0062] In a preferred embodiment, Figure 4 As shown, the internal routing of the optical fiber takes a single-stage module as an example. Optical fiber 2 (dashed line in the figure) extends from the lower layer to the upper layer along the transformer 6 tunnel in the center of the high-voltage platform. After reaching the corresponding level, it turns into and connects to the high-voltage module controller 3. Optical fiber 2 is inserted into the PON Stick module 36. This connection method can achieve no effect on the external equalizing ring, ensuring that the high voltage is evenly distributed around.

[0063] The control method based on the control structure of the cascade transformer high-voltage platform of the present invention is described in detail below, including:

[0064] S1, the external control system sends a signal to the high-voltage module controller 3 of each level inside the high-voltage platform to confirm whether all equipment at each level is in normal operation;

[0065] S2. The external control system sends target parameters (usually target high voltage) to the high voltage module controller 3 in normal working state according to the feedback results of all high voltage module controllers 3, and sends them to the inside of the high voltage platform through the passive optical splitter 1.

[0066] For example, if the target voltage is 100kV and there are 9-level high-voltage module controllers 3 that feedback is operating normally, then a target voltage of 11.1kV is usually issued to these 9-level high-voltage controllers 3, so that the entire high-voltage platform reaches 100kV; of course, under special operating conditions, 20kV can also be issued to one high-voltage module controller 3, and the remaining 8 high-voltage module controllers 3 can issue a target voltage of 10kV. The specific voltage can be determined according to actual conditions. This is an example and is not limited to this.

[0067] S3. After the high-voltage controllers 3 at each level inside the high-voltage platform receive the corresponding target voltage, the main control logic processor 31 of the high-voltage controllers 3 at each level calculates the actual output parameters and PID parameters based on the device parameters, and sends the data to the feedback control processor 35. The feedback control processor 35 outputs the corresponding analog signal of the target high voltage to the high-voltage module of the corresponding level through the analog signal processor 34. Finally, the entire high-voltage platform operates at the target voltage.

[0068] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In the description of this specification, the reference term "a preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A control structure based on a cascade transformer high voltage platform, characterized in that: The control structure includes a communication unit and high-voltage module controllers at various levels arranged inside the high-voltage platform; The communication unit adopts a passive optical splitter, which is connected to the high-voltage module controllers at each level through multiple optical fibers. The passive optical splitter also passes through the high-voltage platform to communicate with the outside world. The passive optical splitter is used to realize data communication and control command transmission inside and outside the high-voltage platform; Each high-voltage module controller is connected to a corresponding high-voltage module of the high-voltage platform and is used to control the target voltage of the corresponding high-voltage module; wherein each level of the high-voltage module controller includes a main control logic processor, a communication processor, an interlocking protection processor, an analog signal processor and a feedback control processor, wherein: The communication processor is configured to enable the main control logic processor to communicate and / or transmit data with an external communication device; The interlocking protection processor is configured to obtain the interlocking status of the internal equipment of the high-voltage platform; The analog signal processor is configured to control the ADC / DAC to collect and output analog signals; The feedback control processor is configured to process the signal collected by the analog signal processor through hardware digital PID high-speed processing to output a target voltage value; The main control logic processor sends PID parameters and voltage target parameters to the feedback control processor according to external instructions and interlocking status, and the feedback control processor sends the target voltage value to the high-voltage module of the corresponding level through the analog signal processor to output the target high-voltage signal.

2. The control structure based on the cascade transformer high voltage platform according to claim 1, characterized in that: The passive optical splitter is also connected to the external communication by passing through the high voltage platform via an aviation plug.

3. The control structure based on the cascade transformer high voltage platform according to claim 1, characterized in that: The high-voltage module controller and the corresponding high-voltage module at each level are powered by a corresponding isolation transformer.

4. The control structure based on the cascade transformer high voltage platform according to claim 1, characterized in that: Each of the high-voltage module controllers is implemented using FPGA. In each level of the high-voltage module controller, the FPGA is programmed into multiple logic processors to implement high-voltage control.

5. The control structure based on the cascade transformer high voltage platform according to claim 1, characterized in that: The high-voltage module controller further includes a PON Stick module, and the communication processor performs signal transmission via the PON Stick module.

6. The control structure based on the cascade transformer high voltage platform according to claim 5, characterized in that: Each of the optical fibers extends from the lower layer to the upper layer along the transformer tunnel in the center of the high-voltage platform, and after reaching the corresponding layer, turns into and is inserted into the PON Stick module of the high-voltage module controller.

7. A control method based on the control structure of the cascade transformer high voltage platform according to any one of claims 1 to 6, characterized in that include: The external control system sends a signal to each level of high-voltage module controller inside the high-voltage platform, and each level of high-voltage module controller sends a feedback signal to confirm whether the corresponding equipment is in normal operation; The external control system sends the target parameters to the high-voltage module controller in normal working state according to the feedback results of the high-voltage module controller, and sends them to the high-voltage platform through the passive optical splitter; After receiving the corresponding target parameters, the high-voltage controllers at each level inside the high-voltage platform send the data to the high-voltage modules at the corresponding level, ultimately making the entire high-voltage platform operate at the target voltage.

8. The control method according to claim 7, characterized in that: After receiving the corresponding target parameters, the high-voltage controllers at each level within the high-voltage platform send data to the high-voltage modules at the corresponding levels, ultimately making the entire high-voltage platform operate at the target voltage, including: The main control logic processor of each level of high-voltage controller calculates the actual output parameters and PID parameters based on the equipment parameters, and sends the data to the feedback control processor of the high-voltage controller. The feedback control processor of the high-voltage controller outputs the corresponding analog signal of the target high voltage to the high-voltage module of the corresponding level through the analog signal processor of the high-voltage controller. Finally, the entire high-voltage platform operates at the target voltage.

9. The control method according to claim 7 or 8, characterized in that: The data of the external control system is packaged by TCP protocol and IP protocol and then sent to the external optical splitter network terminal of the high-voltage platform. It is then packaged again on the optical splitter network terminal and a GEM frame header is added. The data is then transmitted to the high-voltage controllers at all levels inside the high-voltage platform through the passive optical splitter. After the data is sent to the high-voltage module controller through the passive optical splitter, it is unpacked step by step by its internal communication processor to remove the packet header and send the data to the main control logic processor of the high-voltage module controller for execution.

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