Power and information collaboration method for full-direct-current wind power collection system

Abstract

The invention discloses a power and information collaboration method for a full-direct-current wind power collection system. The method comprises the following steps: acquiring a baseband signal containing information to be transmitted; superposing the baseband signal into a preset modulated wave to obtain a target signal containing the information to be transmitted; comparing the target signal with a carrier wave to obtain a control signal containing the information to be transmitted; and voltage output by the wind generating set is regulated based on the control signal, so that the regulated voltage contains the to-be-transmitted information. According to the embodiment of the invention, the method can achieve the coupling of the to-be-transmitted information, and reduces the complexity, cost and maintenance difficulty of a full-DC wind power collection system.

Description

A method for power and information coordination in a full DC wind power collection system Technical Field

[0001] This application belongs to the field of power electronics technology, and in particular relates to a method for power and information coordination in a full DC wind power collection system. Background Technology

[0002] With the rapid development of new energy technologies, the offshore wind power industry is booming and its scale continues to expand. Against this backdrop, all-DC wind power collection systems, due to their advantages such as no need for synchronization, low loss, and high stability, are gradually becoming an important direction for the future development of offshore wind power technology.

[0003] In a fully DC wind power aggregation system architecture, the DC-DC converters corresponding to each wind turbine need to be coordinated and controlled to maintain system power balance and voltage stability. Currently, this mainly relies on external communication networks, such as fiber optic Ethernet, to achieve information exchange between multiple wind turbines.

[0004] However, this not only increases the complexity, cost, and maintenance difficulty of the all-DC wind power collection system, but also poses the risk of control failure in the event of network failure. Summary of the Invention

[0005] This application provides a method for power and information coordination in a full DC wind power aggregation system, which can achieve coupling of information to be transmitted and reduce the complexity, cost and maintenance difficulty of the full DC wind power aggregation system.

[0006] In a first aspect, embodiments of this application provide a power and information coordination method for a full DC wind power collection system, applied to a DC-DC converter. The method includes: acquiring a baseband signal containing information to be transmitted; superimposing the baseband signal onto a preset modulation wave to obtain a target signal containing information to be transmitted; comparing the target signal with a carrier wave to obtain a control signal containing information to be transmitted; and adjusting the voltage output of the wind turbine generator based on the control signal so that the adjusted voltage contains information to be transmitted.

[0007] In one embodiment, a baseband signal is superimposed onto a preset modulation wave to obtain a target signal containing information to be transmitted, comprising: modulating the baseband signal using a preset signal modulation method to obtain a modulated high-frequency baseband signal; and superimposing the modulated high-frequency baseband signal onto the preset modulation wave to obtain a target signal containing information to be transmitted.

[0008] In one embodiment, the DC-DC converter includes a switching element; acquiring a baseband signal containing information to be transmitted includes: in response to receiving a signal transmission command, sending a conduction signal to the switching element to acquire the baseband signal containing the information to be transmitted.

[0009] In one embodiment, the method further includes: acquiring a bus voltage, which includes the regulated voltage output by the wind turbine generator; filtering the bus voltage at different filtering frequencies to obtain filtered voltages corresponding to multiple frequency channels, wherein the number of different filtering frequencies is determined based on the baseband signal; calculating the modulus of the filtered voltages of the multiple frequency channels to obtain calculation results corresponding to the multiple filtered voltages; determining a target voltage from the multiple filtered voltages based on preset decision conditions and the calculation results corresponding to the multiple filtered voltages; and demodulating the frequency channel corresponding to the target voltage to obtain the information to be transmitted.

[0010] In one embodiment, a target voltage is determined from multiple filtered voltages based on preset decision conditions and calculation results corresponding to multiple filtered voltages, including: obtaining the voltage envelope corresponding to each filtered voltage, determining the amplitude information corresponding to each filtered voltage, and taking the voltage corresponding to the largest amplitude information among the multiple amplitude information as the target voltage.

[0011] In one embodiment, demodulation is performed based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted, including: determining the target parsing time corresponding to the target voltage according to a preset symbol clock; and demodulating the target voltage at the target parsing time based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted contained in the bus voltage.

[0012] Secondly, embodiments of this application provide a power and information coordination device for a full DC wind power collection system. The device includes: an acquisition module for acquiring a baseband signal containing information to be transmitted; a first determination module for superimposing the baseband signal onto a preset modulation wave to obtain a target signal containing information to be transmitted; a second determination module for comparing the target signal with a carrier wave to obtain a control signal containing information to be transmitted; and a third determination module for adjusting the voltage output of the wind turbine generator based on the control signal, so that the adjusted voltage contains information to be transmitted.

[0013] Thirdly, embodiments of this application provide a power and information coordination device for a full DC wind power collection system. The device includes a processor and a memory storing computer program instructions. When the processor executes the computer program instructions, it implements the power and information coordination method for a full DC wind power collection system as described in the first aspect or any embodiment of the first aspect.

[0014] Fourthly, a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the power and information coordination method for a full DC wind power collection system according to the first aspect or any embodiment of the first aspect.

[0015] Fifthly, embodiments of this application provide a computer program product in which instructions, when executed by a processor of an electronic device, cause the electronic device to perform a power and information coordination method for a full DC wind power collection system as described in the first aspect or any embodiment of the first aspect.

[0016] The power and information coordination method for a full DC wind power aggregation system according to this application embodiment can obtain a target signal containing the information to be transmitted by acquiring a baseband signal containing the information to be transmitted and superimposing the baseband signal onto a preset modulation wave. By comparing the target signal with a carrier wave, a control signal containing the information to be transmitted is obtained, and the voltage output of the wind turbine generator is regulated based on the control signal so that the regulated voltage contains the information to be transmitted. In this application embodiment, when coupling the information to be transmitted to the voltage output of the DC-DC converter, no additional communication equipment is required, thus simplifying the structure of the full DC wind power aggregation system and reducing the complexity and cost of system wiring. Furthermore, in this application, the coupling of the signal to be transmitted is achieved in the above manner, avoiding the problems of system structure complexity caused by using couplers. Moreover, the DC-DC converter can send the voltage containing the information to be transmitted to the bus, and any other DC-DC converter in the full DC wind power aggregation system can directly determine the information to be transmitted based on the acquired voltage ripple, without the need for a centralized dispatch controller, thus improving system autonomy and response speed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 shows a flowchart illustrating a power and information coordination method for a full DC wind power aggregation system according to an embodiment of this application; Figure 2 shows an architectural diagram of a full DC wind power aggregation system according to an embodiment of this application; Figure 3 shows a flowchart illustrating a power and information coordination method for a full DC wind power aggregation system according to an embodiment of this application; Figure 4 shows a schematic diagram of power and information coordination control according to an embodiment of this application; Figure 5 shows a schematic diagram of voltage demodulation according to an embodiment of this application; Figure 6 is a structural schematic diagram of a power and information coordination device for a full DC wind power aggregation system according to another embodiment of this application; Figure 7 is a structural schematic diagram of a power and information coordination equipment for a full DC wind power aggregation system according to yet another embodiment of this application. Detailed Implementation

[0019] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0021] With the rapid development of new energy technologies, the offshore wind power industry is booming and its scale continues to expand. Traditional AC collection methods are gradually revealing problems such as large energy losses, poor system stability, and high construction costs in long-distance, high-power-density offshore power transmission scenarios. Against this backdrop, all-DC wind power collection systems are gradually becoming an important direction for the future development of offshore wind power technology due to their advantages such as no need for synchronization, low losses, and high stability.

[0022] In a fully DC wind power aggregation system architecture, the DC-DC converters corresponding to each wind turbine need to be coordinated and controlled to maintain system power balance and voltage stability. Currently, this mainly relies on external independent communication networks, such as fiber optic Ethernet, Recommended Standard 485 (RS485), or Controller Area Network (CAN) to achieve information exchange between multiple wind turbines.

[0023] However, this process requires the additional deployment of communication lines and signal coupling modules, increasing construction and maintenance costs and complicating the structure of the all-DC wind power aggregation system. Furthermore, the signal coupling module has limited coupling capabilities and poor real-time performance. In an all-DC wind power aggregation system, the communication quality between the various DC-DC converters often depends on the performance of the communication network. If the communication network fails, it may adversely affect the coordinated control of the various DC-DC converters in the system, leading to system instability.

[0024] This not only increases the complexity, cost, and maintenance difficulty of the all-DC wind power collection system, but also poses a risk of control failure in the event of network failure.

[0025] Therefore, in order to solve the problems of the prior art, this application provides a power and information coordination method for a full DC wind power collection system (also known as a voltage and information coordination method, device, equipment, storage medium, and program product). The power and information coordination method for a full DC wind power collection system provided in this application will be described below.

[0026] Figure 1 shows a flowchart of a power and information coordination method for a full DC wind power aggregation system provided in an embodiment of this application. As shown in Figure 1, the power and information coordination method for a full DC wind power aggregation system includes the following steps S110-S140: S110, acquiring a baseband signal containing information to be transmitted.

[0027] S120. The baseband signal is superimposed on the preset modulation wave to obtain the target signal containing the information to be transmitted.

[0028] S130. Compare the target signal with the carrier wave to obtain a control signal containing the information to be transmitted.

[0029] S140. The voltage output of the wind turbine generator is regulated based on the control signal so that the regulated voltage contains the information to be transmitted.

[0030] For example, the power and information coordination method of the all-DC wind power aggregation system described in this application can be applied to DC-DC converters. Figure 2 shows a schematic diagram of the architecture of an all-DC wind power aggregation system provided in one embodiment of this application. As shown in Figure 2, the all-DC wind power aggregation system can contain multiple DC interface wind turbine generators (DC Wind Turbines, DC-WTs) connected in series and / or parallel, which can be used to generate DC signals. Furthermore, each wind turbine generator is equipped with a corresponding DC-DC converter to regulate the DC voltage generated by the wind turbine generator, thereby stabilizing the power output of the DC-DC converter within the rated power range of the bus. Further, the offshore booster station can regulate the bus voltage and transmit the regulated voltage to the onshore converter station or DC grid access point via DC cables.

[0031] In some embodiments, in S110, a baseband signal containing the information to be transmitted can be acquired. The baseband signal can be the original signal containing the information to be transmitted.

[0032] For example, the information to be transmitted may be parameter information required for voltage regulation by a DC-DC converter. Furthermore, the information to be transmitted may include one or more types of parameter information. For example, the information to be transmitted may be temperature parameter information, voltage parameter information, etc.

[0033] For example, the DC-DC converter is connected to the wind turbine generator set to receive the voltage generated by the wind turbine generator set and to regulate the voltage generated by the wind turbine generator set so that the regulated voltage is stabilized within the rated voltage range of the bus.

[0034] In some alternative embodiments, the DC-DC converter may include switching elements. In response to receiving a signal transmission command, the DC-DC converter may send a turn-on signal to the switching elements to obtain a baseband signal containing the information to be transmitted.

[0035] For example, when the DC-DC converter receives a signal transmission command, it can send a turn-on signal to the switching element to turn on the switching element, thereby enabling the information to be transmitted to the DC-DC converter.

[0036] In one example, after the receiving unit of the DC-DC converter receives the baseband signal, it can send a turn-on signal to the switching element to turn on the switching element, thereby enabling the information to be transmitted in the baseband signal to be transmitted to the DC-DC converter.

[0037] In another example, the switching element can be a fully controllable device, such as a metal-oxide-semiconductor field-effect transistor (MOSFET).

[0038] In this application, by adding a switching element to the DC-DC converter, the switching element is controlled to close when signal transmission is required, thereby enabling the transmission of baseband signals. When the signal to be transmitted is not required, the switching element is controlled to open, ensuring the voltage regulation function of the DC-DC converter.

[0039] In some embodiments, in S120, the baseband signal can be superimposed on a preset modulation wave to obtain a target signal containing the information to be transmitted.

[0040] For example, the preset modulation wave is a high-frequency signal relative to the original baseband signal, and the preset modulation wave is generally a sine wave. Square waves are not used because they suffer significant energy loss and severe signal attenuation during transmission.

[0041] For example, a baseband signal can be superimposed on a preset modulation wave to obtain a target signal containing the transmitted information.

[0042] In some optional embodiments, the baseband signal can be modulated by a preset signal modulation method to obtain a modulated high-frequency baseband signal; and the modulated high-frequency baseband signal can be superimposed on a preset modulation wave to obtain a target signal containing the information to be transmitted.

[0043] For example, the preset signal modulation method can be a signal modulation method predetermined by those skilled in the art according to different needs.

[0044] In one example, frequency shift keying (FSK) can be used to modulate a baseband signal into a high-frequency signal. For instance, quaternary frequency shift keying (QFSK) can be used to modulate the baseband signal. It is understood that QFSK has a high modulation speed, enabling rapid modulation of the baseband signal into a high-frequency baseband signal, thereby achieving fast transmission of the information to be transmitted.

[0045] Understandably, a baseband signal can contain multiple symbols. When modulating a baseband signal using QFSK, these symbols can be grouped into sets of two bits each, and different types of symbol groups can be modulated to different frequencies. For example, symbol groups can include four types: 00, 01, 10, and 11. The baseband signal corresponding to 00 can be modulated to a signal with frequency f0, the baseband signal corresponding to 01 to a signal with frequency f1, the baseband signal corresponding to 10 to a signal with frequency f2, and the baseband signal corresponding to 11 to a signal with frequency f3.

[0046] In another example, phase shift keying (PSK) can be used to modulate the baseband signal into a high-frequency signal. For instance, quadrature phase shift keying (QPSK) can be used to modulate the baseband signal.

[0047] For example, the modulated high-frequency baseband signal can be superimposed on a preset modulation wave to obtain a target signal containing the information to be transmitted.

[0048] In this embodiment, the baseband signal can be modulated into a high-frequency baseband signal according to a preset signal modulation method, and the modulated high-frequency baseband signal is superimposed on a preset modulation wave. It is understood that the preset modulation wave can be a low-frequency signal. When the high-frequency baseband signal is superimposed on the low-frequency preset modulation wave, the information to be transmitted in the baseband signal can be ensured to remain intact and unaffected, thereby improving the accuracy of the transmitted signal.

[0049] In some embodiments, in S130, the target signal can be compared with the carrier wave to obtain a control signal containing the information to be transmitted.

[0050] For example, the carrier wave can be a high-frequency reference signal used to compare with the target signal, thereby generating a control signal. This control signal can be used to regulate the output voltage of the wind turbine generator, thereby stabilizing the modulated voltage within the bus's rated voltage range. In one example, the control signal can be a pulse width modulation (PWM) signal.

[0051] For example, the carrier wave can include various waveforms such as triangular waves and sawtooth waves. Furthermore, its frequency affects the frequency of the control signal. In one example, a triangular wave can be output using a triangular wave generator.

[0052] For example, a target signal and a carrier can be input to a comparator. The comparator compares the amplitudes of the target signal and the carrier, thereby outputting a control signal. In one example, the comparator outputs a high level if it determines that the target signal amplitude is greater than the carrier amplitude, and outputs a low level if it determines that the target signal amplitude is less than the carrier amplitude.

[0053] In some embodiments, in S140, the voltage output by the wind turbine generator can be regulated based on a control signal so that the regulated voltage contains the information to be transmitted.

[0054] Exemplary, exemplary, the voltage regulation module present in the DC-DC converter can regulate the output voltage of the wind turbine generator. In one example, the DC-DC converter may employ a Boost circuit, wherein the Boost circuit has a switching transistor (e.g., a MOSFET). Furthermore, the on / off state of the MOSFET can be controlled by a PWM signal, thereby regulating the output voltage of the wind turbine generator.

[0055] For example, since the control signal contains information to be transmitted, the voltage ripple after voltage regulation carries the information to be transmitted.

[0056] In one example, when the baseband signal is modulated using frequency shift keying (FPS), the information to be transmitted can reside in the frequency of the regulated voltage ripple. When the baseband signal is modulated using phase shift keying (PPS), the information to be transmitted can reside in the phase of the regulated voltage ripple.

[0057] For example, a target signal containing the information to be transmitted can be obtained by acquiring a baseband signal containing the information to be transmitted and superimposing the baseband signal onto a preset modulation wave. By comparing the target signal with a carrier wave, a control signal containing the information to be transmitted is obtained, and the voltage output by the wind turbine generator is regulated based on the control signal, so that the regulated voltage contains the information to be transmitted. In this embodiment, when coupling the information to be transmitted to the voltage output by the DC-DC converter, no additional communication equipment needs to be deployed, thus simplifying the structure of the all-DC wind power aggregation system and reducing the complexity and cost of system wiring. For example, in traditional power line communication (PLC), a coupler is required to couple the signal to be transmitted, and a corresponding communication chip is also required to transmit the coupled signal to the corresponding DC-DC converter. In this application, however, the coupling of the signal to be transmitted can be achieved through the above method, avoiding the system structure complexity problems caused by using a coupler. Furthermore, the DC-DC converter can send the voltage containing the information to be transmitted to the bus. Any DC-DC converter can directly determine the information to be transmitted based on the collected voltage ripple, without the need for a centralized scheduling controller, thus improving system autonomy and response speed.

[0058] Furthermore, in this application, the signal to be transmitted is embedded in the DC power control signal for transmission, which reduces the susceptibility to electromagnetic interference and provides higher communication reliability.

[0059] In order to achieve the interpretation of the signal to be transmitted, as another implementation of this application, this application also provides another implementation of the power and information coordination method of the all-DC wind power collection system, as detailed in the following embodiments.

[0060] Figure 3 shows a flowchart of a power and information coordination method for a full DC wind power collection system provided in an embodiment of this application. As shown in Figure 3, the power and information coordination method for a full DC wind power collection system includes the following steps S310-S340: S310, obtaining the bus voltage, where the bus voltage includes the regulated voltage output by the wind turbine generator set.

[0061] For example, a DC-DC converter can acquire the bus voltage and preprocess the acquired bus voltage to improve its signal-to-noise ratio.

[0062] In one example, the bus voltage can be preprocessed using filters and amplifiers.

[0063] For example, the bus voltage can be obtained through a digital-to-analog converter.

[0064] S320. Filter the bus voltage according to different filtering frequencies to obtain the filter voltages corresponding to multiple frequency channels.

[0065] The number of filter frequencies is determined based on the baseband signal. In one example, the number of filter frequencies can be determined based on the modulation method of the baseband signal. For example, when the baseband signal is modulated using QFSK, the number of filter frequencies is 4.

[0066] For example, different frequency channels correspond to different filter frequencies.

[0067] In one example, the acquired bus voltage can be input in parallel into multiple bandpass filters with different filtering frequencies, thereby extracting signal components of different frequency channels from the bus voltage.

[0068] S330. Calculate the magnitude of the filter voltage for multiple frequency channels respectively, and obtain the calculation results corresponding to the multiple filter voltages respectively.

[0069] For example, the modulus of the filter voltage for each frequency channel is calculated to obtain the calculation result corresponding to each filter voltage.

[0070] In one example, the calculation results for each filter voltage can be obtained through operations such as envelope extraction or square integration.

[0071] S340. Based on the preset decision conditions and the calculation results corresponding to multiple filter voltages, determine the target voltage from multiple filter voltages.

[0072] For example, the preset decision conditions can be screening conditions for multiple filter voltages that are pre-set by technicians according to different needs.

[0073] In some alternative embodiments, the amplitude information corresponding to each filtered voltage can be determined by obtaining the voltage envelope corresponding to each filtered voltage, and the voltage corresponding to the largest amplitude information among multiple amplitude information is taken as the target voltage.

[0074] Specifically, the preset decision condition can be set to the maximum value among the calculation results corresponding to multiple filter voltages. Furthermore, the calculation result corresponding to the filter voltage can be the voltage amplitude, and the voltage amplitude can also be obtained using square integral calculation.

[0075] In this embodiment, the amplitude information corresponding to each filtered voltage is calculated, and the voltage corresponding to the largest amplitude information among multiple amplitude information is taken as the target voltage. It is understood that amplitude information reflects the energy intensity of the filtered voltage; that is, the greater the energy intensity, the larger the amplitude. In this application, selecting the voltage with the largest amplitude, i.e., the voltage with the largest energy, as the target voltage can determine the dominant frequency channel in the bus voltage, thereby improving the accuracy of demodulation of the information to be transmitted.

[0076] In some alternative embodiments, the filtered voltage is calculated by the controller to obtain a voltage magnitude value. Further, multiple voltage magnitude values ​​can be compared with preset voltage thresholds in the controller to determine the type of the symbol.

[0077] S350: Demodulate based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted.

[0078] For example, the information to be transmitted corresponding to the target voltage can be determined by using a corresponding demodulation algorithm based on the frequency of the target voltage's frequency channel. The demodulation algorithm can include the correspondence between frequency and symbol. Furthermore, the information to be transmitted corresponding to the symbol can be determined based on preset information rules.

[0079] It is understandable that when the bus voltage is obtained using QFSK modulation, it can be filtered through four filtering channels with different frequencies, resulting in four filtered voltages. Further, the amplitude of each voltage can be calculated, and the filtering frequency corresponding to the voltage with the largest amplitude can be selected as the dominant frequency of the current voltage. Then, according to a preset frequency-symbol correspondence rule, the symbol corresponding to that frequency is determined. Finally, the information to be transmitted corresponding to that symbol is determined.

[0080] In some optional embodiments, the target parsing time corresponding to the target voltage can be determined according to a preset symbol clock; based on the frequency channel corresponding to the target voltage, the target voltage is demodulated at the target parsing time to obtain the information to be transmitted contained in the bus voltage.

[0081] For example, a preset symbol clock can be used to determine the sampling time of the bus voltage, thereby ensuring that the information to be transmitted contained in the bus voltage can be correctly parsed.

[0082] In one example, the clock period of the preset symbol can be determined based on the duration of the symbol, and the clock frequency of the preset symbol can be determined based on the transmission rate corresponding to the symbol.

[0083] For example, the bus voltage can be sampled according to the sampling time corresponding to the preset symbol clock to obtain a more accurate symbol, thereby realizing the accurate reading of the information to be transmitted.

[0084] In this embodiment, the target parsing time for the DC bus voltage is determined by a preset symbol clock, that is, the point with the best signal quality in the DC bus voltage is selected for sampling. This allows for accurate acquisition of the corresponding symbols, thereby accurately determining the information to be transmitted contained in the DC bus voltage and improving the accuracy of DC bus voltage decoding.

[0085] For example, after obtaining the bus voltage, it can be filtered at different filtering frequencies to obtain filter voltages corresponding to multiple frequency channels. The magnitudes of these filter voltages are then calculated to obtain calculation results for each filter voltage. Further, based on preset decision conditions and the calculation results for each filter voltage, a target voltage is determined from the multiple filter voltages. Demodulation is then performed on the frequency channel corresponding to the target voltage to obtain the information to be transmitted. It is understood that in this embodiment, by calculating the magnitude (i.e., energy) of the filter voltage for each channel and selecting the channel with the strongest energy as the target, the influence of low-energy frequencies on the information to be transmitted can be avoided, automatic noise channel suppression can be achieved, and the robustness of the all-DC wind power aggregation system can be improved.

[0086] For example, the power and information coordination method of the all-DC wind power collection system is illustrated with reference to Figures 4 and 5 and the following examples.

[0087] Figure 4 illustrates a schematic diagram of power and information coordinated control provided in one embodiment of this application. As shown in Figure 4, when there is no data to be transmitted, the communication switch can be disconnected. At this time, the DC-DC converter can generate a PWM signal through a modulation wave and a triangular wave generator, and perform traditional power conversion based on the PWM signal. That is, the modulation wave v m (t) and triangular carrier v c (t) Compare and generate a PWM signal, whose duty cycle can be δ(t). The PWM signal can be used to control the on and off of the switching transistor in the voltage regulation circuit. When there is data to be transmitted, the communication switch can be turned on, and the DC-DC converter will transmit the baseband signal v containing the signal to be transmitted. s (t) is modulated into a high-frequency signal v using QFSK. d (t), then superimposed on the original modulated wave v m On (t), the power of the composite and the modulation amount v of the signal to be transmitted are generated. e (t). This is further related to the triangular carrier wave v. c (t) The comparison generates a PWM signal, which makes the frequency or phase of the DC-DC converter output voltage ripple carry the signal to be transmitted, realizing power and information coordinated control modulation and improving the communication rate.

[0088] Figure 5 shows a schematic diagram of voltage demodulation provided in an embodiment of this application. As shown in Figure 5, the bus voltage demodulation process mainly includes five main stages: signal preprocessing, bandpass filtering, modulus calculation, modulus comparison, and sampling decision. The voltage signal input to the bus is first preprocessed by a preprocessing module 501 containing filters and amplifiers to suppress noise and enhance signal amplitude, thereby improving the signal-to-noise ratio of subsequent demodulation. Further, the voltage signal is input in parallel to a bandpass filtering module 502. This bandpass filtering module contains four filters with different center frequencies; that is, the voltage signal is input in parallel to four bandpass filters (i.e., bandpass filters 1 to 4) with center frequencies of f0, f1, f2, and f3, respectively, to extract signal components from different frequency channels. The outputs of bandpass filters 1 to 4 are V... f0 V f1 V f2 V f3 Furthermore, each output signal enters the modulus calculation module 503, where envelope extraction or square integration is performed on the filtered bandpass signal to obtain amplitude information reflecting the energy intensity of each frequency component. Further, the modulus can be sent to the modulus comparison module 504 for amplitude comparison to determine the dominant frequency channel within the current symbol period. Generally, the maximum value decision principle is adopted, meaning the frequency corresponding to the highest energy is the current modulation frequency. Finally, in the sampling and decision module 505, the comparison result is quantized and decided at the optimal sampling time according to the set symbol clock, and the corresponding data signal is output. Since QFSK modulation uses four frequencies to represent two bits of binary code (e.g., f0 corresponds to symbol 00, f1 to symbol 01, f2 to symbol 10, and f3 to symbol 11), this demodulation structure can achieve efficient symbol recognition. The DC-DC converter in the all-DC wind power aggregation system has advantages such as clear structure, simple implementation, and strong noise resistance.

[0089] Based on the power and information coordination method for a full DC wind power aggregation system provided in the above embodiments, this application also provides specific implementation methods for a power and information coordination device for a full DC wind power aggregation system. Please refer to the following embodiments.

[0090] Referring first to Figure 6, the all-DC wind power aggregation system power and information coordination device 600 provided in this embodiment includes the following modules: an acquisition module 601, used to acquire a baseband signal containing information to be transmitted; a first determination module 602, used to superimpose the baseband signal onto a preset modulation wave to obtain a target signal containing the information to be transmitted; a second determination module 603, used to compare the target signal with a carrier wave to obtain a control signal containing the information to be transmitted; and a third determination module 604, used to adjust the voltage output by the wind turbine generator set based on the control signal, so that the adjusted voltage contains the information to be transmitted.

[0091] As one implementation of this application, the first determining module 602 superimposes the baseband signal onto a preset modulation wave to obtain a target signal containing the information to be transmitted: modulates the baseband signal using a preset signal modulation method to obtain a modulated high-frequency baseband signal; superimposes the modulated high-frequency baseband signal onto the preset modulation wave to obtain a target signal containing the information to be transmitted.

[0092] As one implementation of this application, the DC-DC converter includes a switching element; the acquisition module 601 acquires the baseband signal containing the information to be transmitted in the following manner: in response to receiving a signal transmission command, it sends a conduction signal to the switching element to acquire the baseband signal containing the information to be transmitted.

[0093] As one implementation of this application, the device further includes a demodulation module for acquiring a bus voltage, wherein the bus voltage includes the regulated voltage output by the wind turbine generator set; filtering the bus voltage according to different filtering frequencies to obtain filter voltages corresponding to multiple frequency channels, wherein the number of frequency channels is determined based on the baseband signal; calculating the modulus of the filter voltages of the multiple frequency channels to obtain calculation results corresponding to the multiple filter voltages; determining a target voltage from the multiple filter voltages based on preset decision conditions and the calculation results corresponding to the multiple filter voltages; and demodulating the frequency channel corresponding to the target voltage to obtain the information to be transmitted.

[0094] As one implementation of this application, the demodulation module determines the target voltage from multiple filtered voltages based on preset decision conditions and calculation results corresponding to multiple filtered voltages as follows: obtaining the voltage envelope corresponding to each filtered voltage, determining the amplitude information corresponding to each filtered voltage; and taking the voltage corresponding to the largest amplitude information among the multiple amplitude information as the target voltage.

[0095] As one implementation of this application, the demodulation module demodulates the target voltage based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted: determining the target parsing time corresponding to the target voltage according to a preset symbol clock; demodulating the target voltage based on the frequency channel corresponding to the target voltage at the target parsing time to obtain the information to be transmitted contained in the bus voltage.

[0096] Figure 7 shows a schematic diagram of the hardware structure of the power and information coordination device of the all-DC wind power collection system provided in the embodiment of this application.

[0097] The power and information coordination equipment in the all-DC wind power collection system may include a processor 701 and a memory 702 storing computer program instructions.

[0098] Specifically, the processor 701 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0099] Memory 702 may include mass storage for data or instructions. For example, and not limitingly, memory 702 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 702 may include removable or non-removable (or fixed) media. Where appropriate, memory 702 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 702 is non-volatile solid-state memory.

[0100] Memory may include read-only memory (ROM), random access memory (RAM), disk storage media devices, optical storage media devices, flash memory devices, and electrical, optical, or other physical / tangible memory storage devices. Therefore, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the methods according to one aspect of this disclosure.

[0101] The processor 701 reads and executes computer program instructions stored in the memory 702 to implement any of the power and information coordination methods of the all-DC wind power collection system in the above embodiments.

[0102] In one example, the power and information coordination device of the all-DC wind power collection system may also include a communication interface 703 and a bus 710. As shown in Figure 7, the processor 701, memory 702, and communication interface 703 are connected through the bus 710 and complete communication with each other.

[0103] The communication interface 703 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0104] Bus 710 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 710 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0105] The all-DC wind power collection system power and information coordination device can execute the all-DC wind power collection system power and information coordination method in this application embodiment based on baseband signals, thereby realizing the all-DC wind power collection system power and information coordination method described in conjunction with Figures 1 and 6.

[0106] Furthermore, in conjunction with the methods for power and information coordination in the all-DC wind power collection system described in the above embodiments, this application embodiment can provide a computer storage medium for implementation. This computer storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the power and information coordination methods in the all-DC wind power collection system described in the above embodiments.

[0107] This application also provides a computer program product, including a computer program, which, when executed, implements any of the methods for power and information coordination of a full DC wind power collection system described in the above embodiments.

[0108] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0109] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0110] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0111] The aspects of this disclosure have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by special-purpose hardware performing the specified functions or actions, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0112] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A method for power and information coordination in a full DC wind power collection system, characterized in that, The method, applied to a DC-DC converter, includes: acquiring a baseband signal containing information to be transmitted; superimposing the baseband signal onto a preset modulation wave to obtain a target signal containing the information to be transmitted; comparing the target signal with a carrier wave to obtain a control signal containing the information to be transmitted; and adjusting the voltage output of a wind turbine generator based on the control signal so that the adjusted voltage contains the information to be transmitted.

2. The method according to claim 1, characterized in that, The step of superimposing the baseband signal onto a preset modulation wave to obtain a target signal containing the information to be transmitted includes: modulating the baseband signal using a preset signal modulation method to obtain a modulated high-frequency baseband signal; and superimposing the modulated high-frequency baseband signal onto the preset modulation wave to obtain a target signal containing the information to be transmitted.

3. The method according to claim 1, characterized in that, The DC-DC converter includes switching elements; The step of acquiring the baseband signal containing the information to be transmitted includes: in response to receiving a signal transmission command, sending a conduction signal to the switching element to acquire the baseband signal containing the information to be transmitted.

4. The method according to claim 1, characterized in that, Also includes: Obtain the bus voltage, which includes the regulated voltage output from the wind turbine generator set; The bus voltage is filtered at different filtering frequencies to obtain filtered voltages corresponding to multiple frequency channels, wherein the number of frequency channels is determined based on the baseband signal; the modulus of the filtered voltages of the multiple frequency channels is calculated to obtain calculation results corresponding to the multiple filtered voltages. Based on the preset decision conditions and the calculation results corresponding to multiple filter voltages, the target voltage is determined from the multiple filter voltages; Demodulation is performed based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted.

5. The method according to claim 4, characterized in that, The step of determining the target voltage from multiple filtered voltages based on preset decision conditions and calculation results corresponding to multiple filtered voltages includes: obtaining the voltage envelope corresponding to each filtered voltage, determining the amplitude information corresponding to each filtered voltage, and taking the voltage corresponding to the largest amplitude information among multiple amplitude information as the target voltage.

6. The method according to claim 4, characterized in that, The step of demodulating the target voltage based on the frequency channel corresponding to the target voltage to obtain the information to be transmitted includes: determining the target parsing time corresponding to the target voltage according to a preset symbol clock; and demodulating the target voltage based on the frequency channel corresponding to the target voltage at the target parsing time to obtain the information to be transmitted contained in the bus voltage.

7. A power and information coordination device for a full DC wind power collection system, characterized in that, The device includes: an acquisition module for acquiring a baseband signal containing information to be transmitted; a first determination module for superimposing the baseband signal onto a preset modulation wave to obtain a target signal containing the information to be transmitted; a second determination module for comparing the target signal with a carrier wave to obtain a control signal containing the information to be transmitted; and a third determination module for adjusting the voltage output of the wind turbine generator based on the control signal, so that the adjusted voltage contains the information to be transmitted.

8. A power and information coordination device for a full DC wind power collection system, characterized in that, The device includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the power and information coordination method of the all-DC wind power collection system as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the power and information coordination method for a full DC wind power collection system as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device performs the power and information coordination method for the all-DC wind power collection system as described in any one of claims 1-6.

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