203 results about "Power-line communication" patented technology

The invention discloses a distribution network power line anti-interference communication method based on adaptive filtering, and belongs to the technical field of distribution network power line communication. According to the method, a communication signal adopting a frequency shift keying modulation mode is acquired from a power line coupler of a distribution network through a signal acquisition module, the communication signal is preprocessed by using a digital signal processing unit, spectral analysis is performed on the preprocessed signal, and characteristic parameters of interference noise are extracted; a coefficient vector of a finite impulse response adaptive filter is initialized based on the characteristic parameters, the order of the filter is in direct proportion to the reciprocal of the dominant interference frequency, fine adjustment is carried out based on noise energy distribution through a table look-up method or a linear mapping relation, and the weight coefficient of the filter is adjusted in real time in the communication process. The adjustment step length is dynamically adjusted according to the real-time estimated signal-to-noise ratio, and finally, the processed signal is output through the adaptive filter and data demodulation is carried out. The method is mainly used for improving the anti-interference capability and the communication reliability of the power private line communication of the distribution network.

A charging device is connected to an external device by a power line and charges an electric vehicle. The charging device includes: a communicator that obtains a connection notification signal from the electric vehicle by wired communication, the connection notification signal indicating that the electric vehicle and the charging device are connected; and a converter that converts the connection notification signal obtained into a signal format compliant with a communication standard of first power line communication performed over the power line to obtain a converted connection notification signal, and outputs the converted connection notification signal to the external device by the first power line communication. The wired communication is communication different from the first power line communication.

According to the novel transponder device and the method and device for achieving multiple functions through power line carrier communication, multiple functions such as train positioning and speed measurement, station track occupation recognition, train occupation and integrity check and train-ground communication are achieved through the novel transponder device and the power line carrier communication, and wireless communication technologies such as the power line carrier communication are integrated; the method can be applied to train operation control, train-ground coordination action, locomotive vehicle information management, unmanned stations and train state monitoring in various scenes, can simplify the types of equipment, reduces the construction cost and the maintenance workload, and improves the transportation efficiency and safety at the same time.

The invention relates to the technical field of transformers, in particular to a signal transformer for multi-path signal coupling of a low-voltage power grid, the signal transformer comprises a magnetic core, an inlet wire winding and an outlet wire winding, efficient electromagnetic coupling and isolation of multi-path signals are achieved through the magnetic core, and a main control chip can send control signals to equipment through a driver and a coupling winding. And receiving an equipment feedback signal. The system can extract characteristics of a control signal and a feedback signal in real time, dynamically calculate a comprehensive crosstalk index, and adaptively adjust parameters of a receiving filter and a driver according to the comprehensive crosstalk index, so that signal crosstalk caused by physical coupling among multiple channels is effectively inhibited. According to the scheme, the structure is simplified, the system cost is reduced, the communication quality and the anti-interference capability of multiple paths of signals in a low-voltage power grid are remarkably improved, and the system is suitable for multiple occasions such as high-reliability power line communication.

The invention provides a cooperative identification method and system for a power line communication signal and an arc fault, and the method comprises the steps: firstly, constructing and training a double-flow communication fault sensor comprising a sensing early-warning sub-module and an active sensing sub-module, then carrying out the communication fault sensing based on the double-flow communication fault sensor, generating a communication fault sensing data set, and transmitting the communication fault sensing data set to a server; then, a graph neural network is adopted to carry out fault mode recognition on the communication fault sensing data set, a communication fault mode graph is generated, then, communication fault positioning is carried out based on the communication fault mode graph, a communication fault positioning data set is generated, and finally, actual feedback data of the communication fault positioning data set is obtained. And the system is updated according to the actual feedback data, so that the fault diagnosis rate and accuracy are improved.

The invention discloses a power line communication signal sending and receiving method and device based on a semi-parallel architecture, and belongs to the technical field of power system communication. The method comprises the following steps: obtaining a sending signal comprising a plurality of sub-signals, dynamically determining the number R of parallel processing units according to a transmission data rate and a clock frequency, phase adjustment, frequency domain transformation, linear combination and filtering processing are carried out through R parallel processing units in the DCT module, the matrix module and the multi-phase filter module in sequence, and finally processed signals are serialized and sent to a power line channel; and the receiving process reversely executes corresponding processing. Therefore, by implementing the method and the device, the problem that the transmission rate and the communication stability of the system are difficult to effectively improve while low resource consumption and low power consumption are ensured in the prior art can be solved.

The embodiment of the invention discloses a photovoltaic junction box and a photovoltaic panel control system, a positive electrode interface and a negative electrode interface are arranged in the photovoltaic junction box and are respectively connected with the positive electrode and the negative electrode of a photovoltaic panel, the positive electrode and the negative electrode of the photovoltaic panel are both connected with a power line, and a bypass circuit is arranged between the positive electrode interface and the negative electrode interface. And arranging a power line communication circuit between the positive interface and the negative interface to realize data communication according to a power line. Therefore, the communication of the photovoltaic panel is realized under the condition of not arranging an additional device, and the cost of the photovoltaic panel control system is reduced.

The invention relates to the field of power line channel modeling, in particular to a power line channel modeling method, system, equipment and medium, power line channel data is actually measured and collected and preprocessed, channel characteristics are extracted, parameters such as characteristic impedance and propagation constant of a power line are calculated by using a transmission line theory, and the power line channel is modeled. Constructing an enhanced conditional generative adversarial network comprising a generator and a discriminator, inputting parameters obtained by theoretical calculation of a transmission line as conditional information in a training process, optimizing structures and loss functions of the generator and the discriminator, enabling the generator to generate a high-quality analog channel sample, fusing a deep learning model with a transmission line theoretical model, and obtaining a high-quality analog channel sample; according to the method, a mixed channel model is formed, model parameters are alternately trained and optimized, accurate prediction of transmission characteristics of the power line channel is realized, complex characteristics of the power line channel can be effectively modeled, and a reliable basis is provided for design optimization of a power line communication system.

A power distribution management system dynamically manages power from an inverter to ensure uninterrupted supply to critical devices, such as power tools, while selectively controlling power to interruptible devices, such as battery chargers, to maintain total current below a predefined threshold. The system includes a microcontroller, an analog-to-digital converter for precise current measurement, and a powerline communications module for real-time data exchange. Current transformers monitor power to each connected device, enabling the system to identify and disconnect lower-priority loads, such as battery chargers, during high-demand periods, while ensuring essential tools remain powered. The system automatically restores power to disconnected devices when load conditions allow, optimizing efficiency and preventing overloading. This intelligent power management approach is particularly suited for portable or hybrid power systems in industrial and field applications.

This application provides a photovoltaic inverter and a control method thereof. The photovoltaic inverter includes an inverter circuit, a communication circuit, an arc detection circuit, and a transformer. The transformer includes a magnetic core, at least one primary coil, and at least two secondary coils. The primary coil and secondary coil of the transformer are wound around the magnetic core. One end of the first primary coil of the transformer is configured to connect to a power source, and the other end of the first primary coil is configured to connect to an input terminal of the inverter circuit. The first secondary coil of the transformer is configured to connect to the communication circuit, and the second secondary coil of the transformer is configured to connect to the arc detection circuit. By including the magnetic core in the transformer, both power line communication and arc detection are realized. According to this application, the communication circuit and arc detection circuit can be centrally arranged in the inverter, thereby reducing installation space while ensuring power supply safety, reducing design costs of the photovoltaic inverter, and achieving a simple structure, simple method, and high applicability.

The invention discloses an information feedback method and device and related equipment, and belongs to the technical field of communication. The information feedback method comprises the following steps: performing channel state information estimation on a dual-mode channel of the MIMO-PLC system to obtain a first dual-mode channel matrix; n optimal codebook vectors are selected from a pre-stored dual-mode codebook, each optimal codebook vector is a dual-mode codebook vector closest to each dual-mode channel vector in spatial distance, and the dual-mode codebook is a codebook adaptive to multiple input multiple output (MIMO) spatial characteristics and power line communication PLC medium characteristics; generating a first index according to the N optimal codebook vectors; and sending first information to the transmitting end, wherein the first information comprises the first index. The feedback content is simplified from a complete channel matrix to a low-bit dual-mode codebook index, and the dual-mode codebook adapts to MIMO spatial characteristics and PLC medium characteristics, so that the requirements of the system for reliability and real-time performance of CSI feedback are met.

The invention discloses a power line channel modeling method and device based on a full-connection conditional generative adversarial network, and a medium, and belongs to the technical field of power line channel modeling, and the method comprises the steps: carrying out the efficient feature extraction and coding of conditional information through a full-connection encoder, converting the conditional information into a feature vector with better representation capability, and carrying out the feature extraction and coding of the conditional information; the input is used as the input of the generator and the discriminator. Conditional information is integrated into the generative adversarial network, and a generator generates corresponding transmission function data according to the conditional information. By improving the accuracy and correlation of the data generated by the generator and enhancing the capability of distinguishing the real data from the generated data by the discriminator, the complex characteristics and time-varying characteristics of the power line channel can be effectively captured, and the transmission function highly consistent with the real data can be predicted and generated according to the condition information. According to the method, more accurate and reliable model support can be provided for design, optimization and evaluation of the power line communication system.

The invention provides a power line communication method and device which are applied to a power line carrier communication system. The method comprises the following steps: a first node sends a first frame and receives a first channel detection result; wherein the first frame comprises a first training domain and a first load area, the first load area is used for bearing first service data, and the first training domain is used for channel detection. The first channel detection result comprises a first communication parameter, and the first communication parameter is determined according to the first frame. By adopting the method, the first node can transmit the first service data to the second node by sending the first frame, and can also indicate the second node to perform channel detection through the first training domain, thereby reducing the interaction process between the nodes, avoiding resource waste and improving the communication efficiency.

Disclosed in the present invention is a hybrid-network lighting control system, comprising a hybrid lighting control system consisting of a wireless control gateway, power line communication controllers, and power line communication lamp controllers. The wireless control gateway is connected to each power line communication controller or each power line communication lamp controller, each power line communication controller is connected to each power line communication lamp controller, and each power line communication lamp controller is connected to each lighting component by means of each power line communication lamp driver. The present invention solves the problems in the prior art that a lighting control system has poor security, high building, upgrading, and maintenance and debugging costs, susceptibility to signal interference in wireless control portions, and inconvenience in use.

The invention relates to a power line communication transmission method, device and system, and the method comprises the steps: firstly obtaining an MIMO channel matrix of a target subcarrier in a power line communication system, then determining a quality evaluation parameter of the target subcarrier according to the channel matrix of the target subcarrier, and then determining a mode matching threshold according to the quality evaluation parameter and the mode matching threshold. And determining a diversity multiplexing mode of the target subcarrier, and finally controlling a sending end to carry out subcarrier mapping and signal transmission processing on the target subcarrier according to the diversity multiplexing mode of the target subcarrier. Namely, by dynamically evaluating the subcarrier quality and adjusting the diversity multiplexing mode in real time, the problem that the prior art cannot adapt to the rapid change of the power line channel is solved, and the method has the advantage of improving the transmission reliability and the rate adaptability of the power line communication system in the dynamic channel environment.

Embodiments of this application provide a communication method, apparatus, and system. In the method, after a first remote radio unit (RRU) determines that a link between the first RRU and a baseband unit (BBU) is in an abnormal state, the first RRU sends information about the first RRU and / or information about an optical module connected to the first RRU to at least one second RRU by using a power line communication (PLC) module in the first RRU. The first RRU is connected to the at least one second RRU by using a power line, and a PLC module is also disposed in the at least one second RRU.

The invention relates to a charging control method and device, electronic equipment and a vehicle, and is applied to the technical field of vehicle charging. The charging control method comprises the steps that under the condition that a vehicle is connected with a charging pile, the duty ratio of a control guide signal sent by the charging pile is acquired; under the condition that the duty ratio is within the first range, the vehicle is controlled to be charged in a first charging mode, signal level attenuation detection of a second charging mode is carried out, and the first charging mode is a charging model based on duty ratio control; and under the condition that the detection result of the signal level attenuation detection is that the detection is passed, the vehicle is controlled to be charged in a second charging mode, and the second charging mode is a charging mode based on power line communication control. According to the invention, the charging delay caused by the fact that a user waits for the completion of signal level attenuation detection of power line communication control is reduced, and the waiting time for starting charging is shortened.

The invention provides a communication unit and a control method thereof, a power converter and a power conversion system, and relates to the technical field of power electronics, and the communication unit comprises a plurality of magnetic rings, a power line communication unit, and a plurality of channel selection switches. A cable on the input side of each DC conversion circuit is provided with at least one magnetic ring; the signal end of the magnetic ring is connected with the signal end of the power line communication unit through at least one channel selection switch; the communication unit is used for switching on the channel selection switch corresponding to the first direct current conversion circuit and switching off the channel selection switch corresponding to the second direct current conversion circuit; the power line communication unit is controlled to send a device search signal, so that the direct current control device receiving the device search signal feeds back a response signal; and receiving the response signal, and taking the direct current control equipment corresponding to the received response signal as the direct current control equipment in the direct current string connected with the first direct current conversion circuit. The identification efficiency of the direct-current conversion circuit connected with the direct-current control equipment can be improved.

The embodiment of the present disclosure discloses a power line communication narrowband interference detection and suppression device, method and chip, and relates to the technical field of power line communication. The device comprises: a narrowband detection and suppression unit acquires an OFDM signal and synchronization state information; when it is determined that the current state of the channel is an idle state based on the synchronization state information, the OFDM signal is detected in a parallel mode, a first detection result is obtained and sent to a master control unit; in response to the working mode being switched to a series mode, narrowband interference suppression is performed and the suppressed OFDM signal is detected, a second detection result is obtained and sent to the master control unit; the master control unit receives the first detection result and the second detection result; when it is determined that there is narrowband interference based on the first detection result, the working mode of the narrowband detection and suppression unit is switched to the series mode; and whether the narrowband interference disappears is determined based on the second detection result. The accurate detection and suppression of narrowband interference are realized by a simple device with low performance requirements.

The utility model relates to the technical field of airport aid-to-navigation lamp communication, and mainly relates to an airport aid-to-navigation lamp power line communication synchronizer, which comprises an aid-to-navigation lamp, the aid-to-navigation lamp comprises an aid-to-navigation lamp body and a control box, and a control module, a communication module, a synchronization module and an analysis module are fixedly installed in the control box. The control module is electrically connected with the communication module, the synchronization module and the analysis module; the communication module is used for realizing connection between a main control center of the navigation aid lamp and the navigation aid lamp so as to receive control data of the main control center; the synchronization module processes the control data to obtain peak data; the local correlation unit is used for processing the peak data to obtain frame header data; the analysis module is used for processing the frame header data and the control data to form a control instruction; the control module is used for controlling the navigation aid lamp body according to the control instruction. The method has the advantages that the frame header position in the control data of the main control center is accurately positioned, so that the effect of communication synchronization between each navigation aid lamp and the main control center is ensured.

The invention provides a power line communication sensing method and system based on an attention mechanism, and the method comprises the steps: carrying out the disturbance of a power line channel through an impedance disturbance array, recording a channel response, generating a channel sensing report according to the channel response, and constructing a disturbance response-based dictionary; the method comprises the steps of obtaining double attention distribution through a real-time channel perception report, to-be-transmitted information and a historical disturbance effect, generating a disturbance strategy matrix according to the double attention distribution, obtaining a disturbance mode combination in combination with a disturbance response base dictionary, executing disturbance on a power line channel through the disturbance strategy matrix and the disturbance mode combination, and obtaining an updated channel perception report. Performing power line communication sensing according to the updated channel sensing report; through the technical scheme with double-attention dynamic adaptation and differential disturbance capabilities, the accuracy and stability of power line communication perception in a complex interference environment are improved.

This invention belongs to the field of power line communication technology and discloses a method, apparatus, device, and storage medium for identifying power grid transformer substations. The method includes sending a synchronization clock command to all transformer terminals and user meters within a target area; at the zero-crossing moment of synchronization, each transformer terminal simultaneously injects a preset characteristic signal sequence into its corresponding line, while user meters within the target area simultaneously collect voltage data from their respective lines; each user meter extracts continuous zero-crossing noise time blocks from the voltage data; calculates the signal-to-noise ratio of each zero-crossing noise time block and filters out effective zero-crossing noise time blocks; and matches the effective zero-crossing noise time blocks with the preset characteristic signal sequences injected by each transformer terminal to determine the transformer substation to which the user meter belongs. This method has stronger anti-interference capabilities and can effectively improve the accuracy and success rate of transformer substation identification in complex power grid environments. The power grid transformer substation identification apparatus, device, and storage medium disclosed in this invention have the same advantages.

A power line communication method and a related device relate to the technical field of communication. The method is applied to a head end node, and comprises the following steps: obtaining a split window plan which comprises the number of split windows and the starting time and duration of a first time window; the windowing plan is obtained based on the windowing number and windowing starting time, the windowing starting time comprises zero crossing point time of an alternating current voltage zero crossing point or first reference time, and the first reference time represents network reference time NTB of the head end node; and sending a windowing plan to the tail end node, wherein the windowing plan is used for the tail end node to obtain the coded modulation parameter corresponding to the first time window. The communication efficiency between the communication nodes can be improved.

The present invention relates to a charging control apparatus and method of an electric vehicle. It can include requesting a charging device for a current required for charging in a state where a power line communication (PLC) is established with the charging device, detecting a round trip time required to receive a response to the request, and adjusting a switching period of a multi-stage inverter based on the round trip time, thereby preventing an interruption in the PLC with the charging device in a process of charging a battery of the electric vehicle.

This invention discloses a multi-band power line communication network system, belonging to the field of communication technology. The multi-band power line communication network system includes a Control Center (CCO) and one or more Power Control Centers (PCOs), each PCO associated with one or more Stations (STAs). Specifically: the CCO is used to determine the current network state of the communication network after the main frequency band is networked, and to determine a channel evaluation strategy adapted to the current network state; each PCO and associated STA is used to perform channel quality evaluation on the main frequency band and sub-frequency bands according to the channel evaluation strategy, and to hierarchically aggregate and report at least some of the channel quality evaluation results to the CCO; the CCO is also used to perform communication topology adjustment and / or frequency band adjustment based on the channel quality evaluation results reported by each PCO. This invention achieves efficient and reliable activation of sub-frequency bands in the communication network.

The present disclosure relates to a vehicle-mounted device and a vehicle. The vehicle-mounted device comprises a first isolation circuit and a first device module. The first end of the first isolation circuit is configured to be connected with a vehicle-mounted power supply. The first end of the first device module is configured to be connected with the vehicle-mounted power supply, and the second end of the first device module is connected with the second end of the first isolation circuit, so that the second end of the first isolation circuit and the second end of the device module can be connected with a terminal device through the same power line. The first isolation circuit is configured to present a high impedance value to communication signals of different frequency bands transmitted on the power line, and the high impedance value is any impedance value greater than a preset impedance value. The technical solution can improve the reliability and stability of the power line communication link in the vehicle-mounted power line communication scene of the intelligent networked vehicle.

Power grid surveillance via topology detection system using power line communications (PLC) is provided by observing, at first and second times, first and second signals, respectively, sent via PLC between a plurality of nodes in an electrical grid; generating first and second lists for a given node of the plurality of nodes of channel impulses responses (CIRs) for the given node to communicate with other nodes in the plurality of nodes respectively based on the first and second signals as observed; identifying from the first list and the second list a certain node with a highest variation in CIR between the first time and the second time; sending a first token for the given node from the given node to the certain node via PLC; and in response receiving a second token from the certain node at the given node, generating a topology change alert.

The invention relates to the technical field of communication, and particularly discloses a power line carrier communication method supporting safe partition access of a power distribution microgrid, which comprises the following steps of: converting service data to a parallel sub-channel of a multi-carrier system through a serial / parallel converter; carrying out frequency hopping on the parallel subcarrier frequency; accessing the two levels of security partitions into a frequency hopping strategy to realize concurrent communication of the two levels of security devices; the parallel sub-channel signals are superposed to form a frequency hopping multi-carrier signal; a receiving end receives signals and sends the signals to Na demodulation branches for dehopping to obtain dehopping signals of each branch, then demodulates the dehopping signals to obtain demodulated signals, converts multiple paths of demodulated signals through a parallel / serial converter to obtain a serial data set, and finally obtains sending data. The method has the advantages that the high-reliability and high-frequency-efficiency communication target of the high-safety area can be achieved, the services of the low-safety area are conversely achieved, the services of the two safety areas exist in a co-fusion mode at the same time, and the method is more suitable for simultaneous access of multi-element heterogeneous services in the power distribution micro-grid.

A master control unit (MCU) is adapted to send wireless lighting fixture control signals to lighting fixtures using wired power line control (PLC) signals. The MCU has: an MCU power controller coupled through power lines for sending illumination power to the lighting fixtures; a command receiver for receiving from an input device, a modulated command signal having lighting fixture commands for the of lighting fixtures; a demodulator for demodulating the modulated command signal to obtain the lighting fixture commands; a wireless encoder for encoding the lighting fixture commands into wireless lighting fixture control signals for the lighting fixtures; a PLC modulator for converting the wireless lighting fixture control signals for the lighting fixtures into PLC lighting fixture control signals; and a power and PLC transmitter for sending the PLC lighting fixture control signals and the illumination power to each of the lighting fixtures using the wired power lines.

A power converter and a data collector. A power line communication (PLC) chip in the power converter can transmit a data signal on a first frequency band, and transmit a control signal on a second frequency band. Signals of different types can be transmitted on the first frequency band and the second frequency band, and the first frequency band and the second frequency band do not overlap each other. Therefore, interference between the signals of different types can be effectively avoided, and simultaneous transmission of the signals of different types can be implemented. This not only effectively enhances flexibility of signal transmission, but also effectively avoids a transmission delay caused by a transmission conflict between the signals of different types in the PLC system, ensuring high timeliness for the data collector to perform data query and scheduling control on the power converter.