[0046] In the following description, specific details such as specific system structures, techniques such as specific system structures, and techniques are proposed to illustrate the embodiments of the present invention. However, those skilled in the art will appreciate that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed description of well known systems, devices, circuits, and methods is omitted to prevent unnecessary details to prevent the description of the present invention.
[0047] In order to make the objects, technical solutions, and advantages of the present invention, the following will be described with reference to the accompanying drawings.
[0048] Please refer to figure 1 , figure 1 A flow diagram of a three-phase data processing method provided by an embodiment of the present invention, the method comprising:
[0049] S101: Get the three-phase data corresponding to the target circuit.
[0050] In the present embodiment, "acquisition" can be understood as being directly acquired from the storage device, or it is understood as direct acquisition from the circuit.
[0051] In one possible implementation, the three-phase data is three-phase voltage data or three-phase current data.
[0052]In a possible implementation, the three-phase data processing method further includes:
[0053] Fourier transform is performed on three-phase data to obtain three-phase data of the active components and the reactive components of the three-phase data.
[0054] Among them, the preset relationship is a matrix transform type, specific, predetermined relationship between the three-phase parameters of the three-phase parameters, the reactive component of the three-phase parameters and the positive orientation DQ components of the three-phase parameters. The active components of the parameters, the reactive component of the three-phase parameters pass the matrix transform to obtain the positive orientation DQ component of the three-phase parameters. Where the three-phase parameter is a parameter corresponding to the three-phase data (for example, if the three-phase data is three-phase voltage data, the three-phase parameter is three-phase voltage. If the three-phase data is three-phase current data, the three-phase parameters are Three-phase current).
[0055] Correspondingly, three-phase data is converted based on the preset relationship, and the positive orientation DQ component corresponding to the three-phase data, including:
[0056] The positive orientation DQ component corresponding to the three-phase data is obtained based on the preset relationship of the active component of the three-phase data and the reactive components of the three-phase data, resulting in the positive orientation DQ component corresponding to the three-phase data.
[0057] S102: The three-phase data is converted based on the preset relationship, and the positive orientation DQ component corresponding to the three-phase data is obtained.
[0058] In the present embodiment, the transformation relationship between the three-phase data and its positive orientation DQ component can be previvified to obtain a preset relationship. In actual applications, three-phase data can be converted directly to the preset relationship, and the data processing efficiency is improved without multi-step calculation.
[0059] S103: Send the positive orientation DQ component to the external control device to enable the control device to generate a control signal corresponding to the target circuit according to the positive orientation DQ component.
[0060] In the present embodiment, the external control device is configured to control the voltage / current of the target circuit by transmitting a control signal to the target circuit, and the specific control can be sagging control, average flow control, etc., which is not limited herein.
[0061] It can be derived from the above-mentioned embodiment of the present invention, and the embodiment of the present invention is derived in advance, and when the actual application is actually applied, according to the preset relationship. Transform three-phase data directly into a positive orientation DQ component. For each data acquisition device, the embodiment of the present invention only needs to transmit four variables (two positive sequence DQ components and two negative order DQ components) can support subsequent control operations, not only effectively improve data transmission efficiency, but also beneficial to Improve the real-time and accuracy of subsequent control.
[0062] Among them, it should be pointed out that the above effect is particularly obvious in the reflection of the airport. For example, in the airport view, the plurality of switching power supply circuits are connected in parallel, and the control devices corresponding to each switching power supply circuit are connected by a communication bus. At this time, the data acquisition device corresponding to each switching power supply circuit is allocated. The variable obtained by collecting data is required. At this time, the decrease in the two upload variables in the present invention (corresponding to each data acquisition device) can effectively reduce the occupancy of the communication bus, thereby increasing the communication speed.
[0063] It should be noted that the solution provided by the present invention can also be used for the rapid determination of the three-phase balance of the target circuit. When the three-phase load balance is known, it is no negative order, i.e., the two negative sequence components of the processed are 0, and the three-phase load balancing is illustrated, and the three-phase load imbalance will be described when 0. Therefore, the application of the present invention can directly obtain a negative sequence component corresponding to the preset relationship, so that the three-phase load balancing can be achieved more easily and quickly.
[0064] In a possible implementation, the predetermined predetermined preset formula of the embodiment of the present invention is:
[0065]
[0066]
[0067] Where X d+ , X q+ , X d- , X q- Three phase parameters X abc The corresponding positive sequence D axis component, the positive order Q axis component, the negative order D axis component, the negative order Q axis component, X Pa , X Pb , X Pc , X Qa , X Qb , X Qc The A-phase Power Differential Summet, B-Piece Power Data, C-Power Differential Power Data, and C - phase Delivery Components of the C - phase Inactive Components, and C - phase Decongs.
[0068] In the present embodiment, if the three-phase data is three-phase voltage data, the X corresponds to U, X corresponds to U. If the three-phase data is three-phase current data, then X corresponds to I, X corresponds to I (the following embodiment is similar).
[0069] In a possible implementation, the three-phase data processing method also includes a derived process of a preset relationship.
[0070] The derivation process for the preset relationship includes:
[0071] S1: List the PQ complex expression of three-phase parameters in three-phase coordinate, where the three-phase parameters are the parameters corresponding to the three-phase data.
[0072] In a possible implementation, the PQ complex expression of the three-phase parameters in the three-phase coordinate is:
[0073]
[0074] Where X a , X b , X c The A phase quantity, three-phase parameters of three-phase parameters, C phase quantity of three-phase parameters, respectively, X Pa , X Pb , X Pc , X Qa , X Qb , X Qc The A-shaped power division in the three-phase parameters, the B-shaped power division, C-shaped power division, a phase reactive component, B phase reactive component, C phase reactive component, α = e j120°.
[0075] Among them, the A phase super B phase is 120 degrees, and the super C phase 240 degrees. Each phase is also a respective active component P and reactive component q, defining a reactive component advances having a power division 90 degrees. On this basis, step S2 can be performed.
[0076] S2: Based on the symmetric component method extracts the positive and negative sequence components under the PQ complex expression (the three-phase parameters of the symmetrical component), the amplitude phase, the like.
[0077] In a possible implementation, the positive orientation component below the three-phase coordinate extracted from the PQ complex expression is:
[0078]
[0079]
[0080]
[0081] Where X a+ , X b+ , X c+ Positive sequence components below three-phase coordinate, X P+ , X Q+ The positive sequence has a power division and a positive order.
[0082]
[0083]
[0084]
[0085] Where X a- , X b- , X c- Negative sequence components below three-phase coordinate, X P- , X Q- The negative sequence has a power division and negative order.
[0086] S3: Based on the extracted positive orientation component, the zero-sequence component of the target circuit is related to the positive orientation component, and the preset DQ transform matrix determines the preset relationship.
[0087] In the present embodiment, the zero sequence component can be expressed as:
[0088]
[0089] In a possible implementation, if the target circuit is zero-line current to be zero-lineless system or the target circuit, the positive orientation component corresponding to the target circuit satisfies X a + X b + X c = 0.
[0090] On this basis, you can get:
[0091]
[0092] On this basis, the active component and reactive component of the negative order can be simplified:
[0093] or
[0094] Transfer the three-phase parameters from the plural form to ordinary form for DQ change:
[0095] Positive order:
[0096]
[0097] Necessize:
[0098]
[0099] Preset DQ transform matrix:
[0100]
[0101] Connect the above sections to get:
[0102]
[0103]
[0104] The preset relationship derived in accordance with an embodiment of the present invention can be directly converted to the obtained positive orientation DQ component, and the resulting positive orientation DQ component is direct flow, and does not include AC components, convenient to calculate and loop control.
[0105] A second aspect of the embodiment of the present invention provides a data acquisition device, see figure 2 , figure 2 A schematic block diagram of a data acquisition device provided by an embodiment of the present invention. like figure 2 The data acquisition device 200 shown in the present embodiment may include: one or more processor 201, one or more input device 202, one or more output devices 203, and one or more memory 204. The above processor 201, the input device 202, the output device 203, and the memory 204 are communicated with each other through the communication bus 205. Memory 204 is used to store computer programs, and computer programs include program instructions. The processor 201 is used to perform the program instruction stored by the memory 204. Where, the processor 201 is configured for calling program instructions to perform the above steps, for example figure 1 The functions shown in steps S101 to S103 are shown.
[0106]It should be understood that in the embodiment of the present invention, the preselected processor 201 can be a central processing unit (CPU), which can also be other general purpose processors, DigitalSignal Processor, DSPs, dedicated Integrated Specific Integrated Circuit, ASIC, ASICS, FPGA, or other programmable logic devices, separate doors or transistor logic devices, discrete hardware components, and the like. The general purpose processor can be a microprocessor or the processor can also be any conventional processor or the like.
[0107] The input device 202 can include a touchpad, a fingerprint sensor (for the direction information of fingerprint information and fingerprints of the user), a microphone, or the like, and the output device 203 can include a display (LCD, etc.), speaker, and the like.
[0108] The memory 204 can include a read only memory and a random access memory and provide instructions and data to processor 201. A portion of the memory 204 can also include a nonvolatile random access memory. For example, memory 204 can also store information about device types.
[0109] In the specific implementation, the processor 201, input device 202, and output device 203, which are described in the embodiment of the present invention, and the output device 203, can perform the first embodiment of the three-phase data processing method according to the embodiment of the present invention, and the second embodiment described. Implementation, it is also possible to implement the implementation of the data acquisition apparatus described in the embodiments of the present invention, and details are not described herein again.
[0110] In another embodiment of the present invention, a computer readable storage medium is provided. The computer readable storage medium stores a computer program, and the computer program includes program instructions, and the program command is executed by the processor, all of the above embodiments. The partial flow can also be done by a computer program to instruct the hardware, and the computer program can be stored in a computer readable storage medium, and the computer program can implement the steps of each of the above-described various method embodiments when executed by the processor. The computer program includes computer program code, computer program code can be a source code form, object code form, executable file, or some intermediate form. Computer readable media can include any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access Memory (RAM, RANDOM Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc. It should be noted that the content included in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice within the judicial jurisdiction, such as in certain jurisdictions, according to legislation and patent practice, computer readable media does not include It is a carrier signal and a telecommunications signal.
[0111] The computer readable storage medium can be an internal storage unit of the data acquisition device of any of the preceding embodiments, such as a hard disk or memory of a data acquisition device. Computer readable storage media can also be an external storage device of a data acquisition device, such as a plug-in hard disk equipped with a data acquisition device, a smart media card, SMC, secure digital (SD) card, flash memory Flash Card, etc. Further, the computer readable storage medium may also include both the internal storage unit of the data acquisition device, also including an external storage device. Computer readable storage media is used to store other programs and data required for computer programs and data acquisition devices. Computer readable storage media can also be used to temporarily store data that has been output or will output.
[0112] One of ordinary skill in the art will appreciate that the unit and algorithm step described herein can be implemented in electronic hardware, computer software or binding of both electronic hardware, computer software or both, for clear explanation of hardware and software. Interchangeability, the composition and steps of each example have been generally described in terms of functions. These functions are executed in hardware or software, depending on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each particular application, but this implementation should not be considered exceeding the scope of the present invention.
[0113] Those skilled in the art will clearly understand that in order to describe convenient and concise, the specific operation of the data acquisition apparatus described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again. In several embodiments provided herein, it should be understood that the disclosed data acquisition apparatus and method can be implemented in other ways.
[0114] A third aspect of the embodiment of the present invention provides a circuit control system 30, including:
[0115] Control device 31 and at least one of the above data acquisition devices 200;
[0116] Each of the data acquisition apparatuses 200 is connected to the control device 31 through the communication bus, the control device 31 for generating a control signal corresponding to each target circuit according to the positive orientation DQ components transmitted by each data acquisition device 200.
[0117] The above, only the specific embodiments of the present invention, but the scope of the invention is not limited thereto, and any equivalent modification can be easily thought of within the technical scope of the present invention, and any skilled in the art. Alternative, these modifications or replaces should be covered within the scope of the invention. Therefore, the scope of the invention should be based on the scope of protection of the claims.
