45 results about "Smart grid communication" patented technology

A smart grid system, method, and apparatus for powering, controlling, and communicating with light emitting diode (LED) lights using Modified Power over Ethernet (M-PoE), which includes capabilities such as the added capability for PoE ports to be turned on-off in response to a signal, and to be have a PoE port's output voltage regulated in response to a signal. M-PoE equipment includes PSE and PD equipment configured such as, but not limited to, midspans, end-spans, etc. The smart grid is a digitally enabled local electrical power distribution grid that is enabled to gather, distribute, and act on information about the behavior of all attached devices, including schedules, time of day, season, occupancy, etc., in order to improve the efficiency, reliability, and economics of electricity services. In addition, the smart grid may also communicate with the larger smart grid, and also may be controlled by the larger smart grid.

A system for communication network management of a utility grid includes a database configured to store a grid information data set, where the grid information data set includes network device information for the utility grid and a network management system executable by a processor to: receive an event message from one or more network devices indicative of one or more failures in a communication network of the utility grid; retrieve the grid information data set; identify one or more network device associated with the one or more failures based on the grid information data set; transmit a request for a response to the identified one or more network devices; determine a response pattern based on responses from the identified one or more network devices in order to identify a cause of the failure based on the response pattern.

The invention discloses a communication method between power line carrier wave IPv6 and wireless ZigBee in the smart grid communication technical field. The method realizes the mutual communication between a power line carrier wave IPv6 network and a wireless ZigBee network under the condition of not changing a ZigBee and power line carrier wave IPv6 protocol, and performs high-efficient treatment on data packages in the networks through a data package multi-space coexistence scheduling strategy and a filtering obstruction mechanism, thereby realizing the seamless connection between power line carrier wave IPv6 and wireless ZigBee heterogeneous networks. The method realizes the communication conversion between power line carrier wave IPv6 and wireless ZigBee, provides a solution for the mixed transmission between a wired network and a wireless network, effectively solves the problem of communication data conversion between a power line carrier wave IPv6 network and a wireless ZigBee network in a smart grid, and promotes the seamless connection between heterogeneous networks in a smart grid.

The invention discloses a detection method, based on entropy analysis, of traffic abnormity of a smart grid communication network. The method comprises the following steps: S1, receiving characteristic values of log information produced during operation of a smart grid in real time; S2, making statistics of the probability of occurrence of each characteristic value within a time threshold; S3, computing the entropy of each characteristic value, and performing normalization processing, so as to produce entropy vectors; S4, repeating S1 to S3, computing the difference value of entropy vectors of the current time threshold and the previous time threshold, and judging the types of network traffic abnormity according to the difference value of the entropy vectors and network traffic attack characteristics. According to the method, the method for acquiring the entropy vectors is relatively simple, and the demand of smart grid log information real-time detection can be effectively met. On the other hand, the method can not only detect log abnormity, but also judge the types of abnormity according to obtained log information, further obtain reasons of smart grid log abnormity, and properly meet the detection requirements of the smart grid.

The invention provides a random access method in smart power grid communication. Under the condition of not increasing additional signaling overheads, the random access collision probability is lowered, and system performance is improved. Due to the fact that multiple smart power grid devices exist and carry out data reporting frequently, the random access collision probability is greatly improved, and the random access process of a common user can be influenced. The random access process for the smart power grid scene is provided. Two different leader sequence sets are generated and used for the common user and a smart power grid respectively. One of MAC RARs is used for reserving bits for marking whether random access is from the common user or the smart power grid. Therefore, under the condition that no additional signaling overhead exists, the random access collision probability of the smart power grid can be reduced, and the random access of the common user cannot be influenced.

The embodiment of the invention provides an IP-optical network communication service joint distribution method and device. The method comprises the following steps: obtaining service information; inputting the service information into a preset route distribution model, and analyzing the preset route distribution model by using a preset deep reinforcement learning model to obtain service route distribution information; wherein the preset route distribution model is obtained by performing normalization weighting on IP-optical network risk balance degree information, main and standby route similarity information and network time delay information. Routing distribution indexes are constructed by considering two aspects of communication network efficiency and risk balance of a intelligent powergrid; according to the method, the specific evaluation method of the service balance degree and the transmission time delay in the power communication network is analyzed, then weighted analysis calculation is performed on the service balance degree and the transmission time delay, a reasonable preset routing allocation model is finally designed, a preset deep reinforcement learning model is selected, and an optimal path is solved, so that efficient and reasonable operation of the IP-optical network is guaranteed.

The invention provides a method for precisely scheduling uplink resources in intelligent network communication. The size of data cached by UE is expressed by cache size index columes in a BSR frame format, and under the larger cache condition, the resources are quite severely wasted. In order to effectively reduce the resource waste condition, the process for sending the report of the status of the uplink data cache domain includes the following steps of refining a cache size section corresponding to a large cache value, setting secondary tables respectively provided with 64 index values for all sub-sections of the cache size section respectively, determining whether to search the secondary tables through a reserved bit position in a sub-head-portion of an MAC control unit or not, and more precisely reflecting the information of the status of the uplink cache of the UE through a certain mapping rule. On the premise that no additional expenses are needed, user and wireless resource scheduling efficiency is improved, and the system resource utilization rate is effectively increased.

The invention relates to a lightweight safe smart power grid communication method and system based on a block chain. Trusted authority is responsible for managing and distributing secret information in the system; a control center is responsible for integrating, processing and analyzing periodic time sequence power consumption data of all users in a community network; a gateway is responsible foraggregating the power consumption data and forwarding the communication data; a sensing node is responsible for collecting electricity consumption data in real time and reporting the electricity consumption data to the control center, and the method comprises the following specific steps: a system initialization stage; a security data collection stage; an accounting node selection stage; a new block generation stage; a block verification stage; a data aggregation stage; an aggregated data recovery stage; and a decision support stage. On the basis of deeply researching and analyzing the existing achievements of the block chain technology in the field of smart power grid application, the lightweight safe smart power grid communication method and system based on the block chain technology arerealized, the confidentiality and integrity of communication data are ensured, and the privacy information of users can be effectively protected.

The present invention discloses a smart grid communication method based on an LTE distributed network. The architecture of the LTE distributed network comprises a terminal and a virtualized EPC core network which is integrated into wireless base station equipment. The method comprises video surveillance communications and emergency command communication. According to the power wireless broadband special network based on the LTE technology, the limitation of a wired environment by an environment structure is avoided, the requirements of safety and reliability can be satisfied, the method can be widely applied to a power grid station, distribution network automation modification and other fields.

A system and method for managing smart grid communication is disclosed. The system includes a communication module, a discovery module, a translation module and a smart grid module. The communication module receives data initiating smart grid communication between a utility server and a communication node. The discovery module identifies a server protocol used by the utility server to communicate with the communication node. The discovery module identifies a node protocol used by the communication node to communicate with the utility server. The node protocol is incompatible with the server protocol. The translation module performs a protocol translation between the server protocol and the node protocol. The smart grid module handles the smart grid communication between the utility server and the communication node using the protocol translation.

The invention discloses a smart power grid based electric power information assembling system and a method in the technical field of smart power grid communication. The system comprises data acquisition modules, data processing modules, smart information container processing modules, a local server, a smart power grid information communication platform and a scheduling module. The method includes that each data acquisition module respectively acquires data of the data acquisition modules, each data processing module converts acquired data into corresponding information, each smart information container processing module compares information of the smart information container processing modules with data stored in the local server to obtain corresponding comparison information, the smart power grid information communication platform performs smart processing to all compared information to obtain a processed result, and the scheduling module compares the processed result with a smart database preset by the smart power grid information communication platform to form a smart power generation scheduling list and transmits scheduling information generated according to the smart power generation scheduling list to each module node. By means of the smart power grid based electric power information assembling system and the method, utilization rate of electrical energy of a whole power grid is increased.

The invention discloses a network flow-based intelligent power grid communication anomaly detection method. The method comprises the steps of S1 network flow fragmentation: dividing each network flowat a fixed interval, forming a fragment after each division, and taking network flow feature extraction and analysis detection units as network flow fragments; S2 network flow feature extraction and preprocessing: carrying out feature extraction on 'client-server' and 'server-client' flows respectively, and carrying out normalization operation on the extracted network flow features; and S3 model construction and detection: constructing a clustering anomaly detection model by adopting an unsupervised clustering method, and performing model detection. According to the method, time dimension statistical information is newly added; more attacks which cannot be detected by a traditional method can be detected; deep analysis does not need to be carried out on messages; a proprietary protocol andan encryption protocol can be detected; an accurate model can be rapidly and efficiently constructed through a density clustering method; and noise points in training data can be well processed.

The invention discloses a method for optimizing the data transmission latency in communication of an intelligent power grid, belonging to the field of data transmission of intelligent power grids. Different types of data can be optimized by introduction of corresponding different virtual latencies; in combination with the arrival time and the corresponding deadline of a data packet thereof, a virtual timestamp is obtained; the scheduling sequence thereof is dynamically adjusted; the more sensitive the latency is, the shorter the virtual latency thereof is; even the practical timestamp of the data packet thereof is not changed, the virtual timestamp is changed by the virtual latency; therefore, on one hand, a data packet having the sensitive latency is superior to a data packet having the non-sensitive latency; on the other hand, due to introduction of the virtual latency, the Domino phenomenon is also solved; and thus, on the premise that the latency non-sensitive data is not influenced, the latency performance of the latency sensitive data is improved.

The invention discloses an efficient spectrum sensing method applied to smart grid communication and a system. The system consists of smart electric meter terminals and a substation control center. The idle spectra of television frequency bands are dynamically utilized to realize bi-direction communication between the terminals and the control center on the basis of a cognitive radio technology. The method includes the following steps that: the control center predicts the occupancy of different television channels by using a three-order exponential smoothing model according to stored historical detection data and selects a group of channels with lower occupancy according to prediction results so as to create a small to-be-detected channel set by using the channels with lower occupancy; andthe smart electric meter terminals detect the small channel set through using a related detection algorithm on the basis of the known features of digital television signal PN sequence codes. Comparedwith a traditional spectrum sensing method, the efficient spectrum sensing method of the invention has the advantages of high detection precision and short detection time. With the method adopted, the probability of detecting idle channels can be increased, and spectrum sensing efficiency in the smart grid communication can be improved.

The invention relates to the technical field of intelligent power grids, and particularly relates to an intelligent power grid communication anomaly detection method based on a time sequence. The method comprises the following steps: for any normal communication network flow, determining a sequence position of each element in a period through a period overlapping mapping based on a period extraction method of discrete Fourier transform so as to determine a periodic time sequence relationship of each element in the normal network flow; obtaining the periodic time sequence relationship of each element in the to-be-detected network flow, and comparing the periodic time sequence relationship with the periodic time sequence relationship of each element in the normal network flow, so that anomaly detection of network communication is realized, and the method has very important significance for monitoring and detection of a strong periodic intelligent power grid control flow.

The invention discloses a fast configuration method for a large-scale smart-grid communication simulation platform. The method includes the steps of adding various simulation objects, and configuring corresponding object attributes and services; binding the added objects and attributes to tree nodes and attributes; introducing typical simulation scenes into a scene configuration module in a fast mode; generating a simulation scene file; opening the simulation scene file, and starting simulation. According to the method, aiming at the large-scale smart-grid simulation platform, all kinds of reasonable simulation object models and business models can be designed; the rapid construction of large-scale smart-grid simulation scenes is achieved by adding required objects, a convenient and accurate method is provided to construct the network simulation scenes, and the operation efficiency and simulation effectiveness of the simulation platform are improved.

A system for communication network management of a utility grid includes a database configured to store a grid information data set, where the grid information data set includes network device information for the utility grid and a network management system executable by a processor to: receive an event message from one or more network devices indicative of one or more failures in a communication network of the utility grid; retrieve the grid information data set; identify one or more network device associated with the one or more failures based on the grid information data set; transmit a request for a response to the identified one or more network devices; determine a response pattern based on responses from the identified one or more network devices in order to identify a cause of the failure based on the response pattern.

The invention relates to the technical field of telecommunication, in particular to an intelligent power grid safety communication method based on a combined password. The system comprises a pluralityof transfer stations, each transfer station is provided with an intelligent computing access module and a cloud module connected with the intelligent computing access module, and the intelligent computing access modules are used for acquiring information of power generation equipment, power transmission equipment, power distribution equipment and power utilization equipment and interacting the acquired information with the cloud modules. Each intelligent computing access module is correspondingly provided with a secret key system, and the cloud module is further connected with a second secretkey system. The method has the beneficial effects that the reliability, integrity, confidentiality and non-repudiation of information transmission are realized; the public key cryptosystem is used inthe smart power grid, so that the authentication and confidentiality of smart power grid communication are ensured, and the number of secret keys stored in the smart power grid is effectively reduced.

The invention discloses data compression and decompression methods and an intelligent power grid communication system. The data compression method includes steps: performing statistics of a character c which appears with the highest frequency in a frame of data and calculating the frequency m of the character c; and generating a bit field Bn of n bits and regenerating a compressed frame. The decompression method comprises traversing the effective bit of the Bn field; if the bit is 1, the corresponding character is c; and if the bit is 0, one character is taken from the remaining byte array. A source coding module of the intelligent power grid communication system realizes the data compression method, and a sink decoding module realizes the decompression method.

The invention discloses an IPv6-based intelligent power grid hierarchical address configuration method. A new IPv6-based addressing structure is arranged in the method. The method comprises the following steps that: when new user-side intelligent equipment is added into a power grid, the user-side intelligent equipment sends a routing request message so as to position a superior acquisition terminal of the user-side intelligent equipment; a superior acquisition terminal judges the number of subordinate acquisition terminals registered by the superior acquisition terminal at present; if the number is smaller than a first threshold value, the superior acquisition terminal sends a route reply message to the user side intelligent equipment; and the user-side intelligent equipment acquires theuser-side equipment ID of the user-side intelligent equipment and replaces the user-side equipment ID and the type ID in the address information of the superior acquisition terminal with the user-sideequipment ID and the type ID of the user-side intelligent equipment, and the replaced address information is the address of the user-side intelligent equipment. The address configuration method is more suitable for a dynamically layered intelligent power grid communication system and a topological form, and is beneficial to improving the expandability and the configuration flexibility of the network.

A system for communication network management of a utility grid includes a database configured to store a grid information data set, where the grid information data set includes network device information for the utility grid and a network management system executable by a processor to: receive an event message from one or more network devices indicative of one or more failures in a communication network of the utility grid; retrieve the grid information data set; identify one or more network device associated with the one or more failures based on the grid information data set; transmit a request for a response to the identified one or more network devices; determine a response pattern based on responses from the identified one or more network devices in order to identify a cause of the failure based on the response pattern.

The invention relates to a TD-LTE230MHz (Time Division Long Term Evolution 230MHz) based electric power wireless wideband radio frequency processing unit. The radio frequency processing unit comprises a radio frequency system, an antenna feed system and an operating interface, wherein the antenna feed system comprises a power amplifier low-noise amplifier module, a power module, a lightning protection module; the radio frequency system comprises a digital processing module and a filter module; the operating interface module comprises an alarm interface, a fiber interface, a power interface and an antenna interface; the power amplifier low-noise amplifier module, the power module, the alarm module and the fiber interface are respectively connected with the digital processing unit; the power interface, the lightning protection module and the power module are sequentially connected; the antenna interface, the filter module and the power amplifier low-noise amplifier module are sequentially connected; and the radio frequency processing unit adopts a box structure. Aiming at the characteristics of more terminals, wide distribution, strong timeliness and high downstream and upstream bandwidth demands of power business, the invention designs the TD-LTE technology-based radio frequency processing unit for a power wireless wideband communication system. The radio frequency processing unit adopts an authorized frequency band between 23 MHz and 235 MHz and is of great significance for the construction of an intelligent power grid communication information platform.

The invention provides a smart power grid privacy protection and electricity stealing detection method based on a block chain. The method is reasonable in design, high in practicability, safe and efficient. The method comprises the following steps: 1) initializing a system; 2) requesting for data aggregation; 3) replying a data aggregation request; 4) generating a user report; 5) aggregating the security data; 6) data aggregation recovery; and 7) the control center CC detects and analyzes the power consumption data so as to detect the electricity stealing behavior of the user. According to the method, the intelligent electric meter with limited resources in practical application can be met, privacy protection and integrity protection in intelligent power grid communication are achieved, safe, efficient and traceable user group data are utilized, electricity consumption data are analyzed to detect the electricity consumption behavior of a user, the electricity stealing behavior is found, and a result is safely transmitted.

The present invention relates to a method and a system for compressing data from a smart meter. The method comprises: LZ-encoding electricity load data collected by the smart meter whenever the smart meter collects the electricity load data; storing the LZ-encoded electricity load data in a temporary database through a smart grid communication channel; reading the electricity load data from the temporary database every preset second duration, wherein the read electricity load data is electricity load data stored in the temporary database within the second duration before a corresponding reading time point; and LZ-decoding the read electricity load data, SAX-compressing the LZ-decoded electricity load data, and storing the SAX-compressed electricity load data in a data center. The present invention has high compression rate, reduces the transmission burden for communication lines and storage burden for the data center, and improves the efficiency of smart electricity data analysis and mining.

The invention discloses smart grid antenna communication equipment, which comprises an antenna cover, a radiation oscillator, a coaxial cable, an antenna base, and an antenna mounting plate, and is characterized in that the radiation oscillator comprises a base, a grounding arm, a feeder arm, a current guide arm and a top bending body; the base is connected with the grounding arm; the top bending body is connected with the grounding arm, the feeder arm and the current guide arm; the outer conductor of the coaxial cable is welded with the base; and the core wire of the coaxial cable is welded on the feeder arm. The equipment of the invention adopts a small-sized radiation oscillator to reduce the height of the antenna, a slotted design is adopted to enable the antenna to meet IP67, and the smart grid antenna communication equipment has the advantages of water prevention, small size, high gain and high reliability and can be well applied as signal transmission antenna equipment for outdoor smart grid communication equipment.

The invention discloses a relay protection controller based on a PXI-e and provided with a smart power grid communication protocol. According to the relay protection controller, a data package sent by an external electric power protection device enters a central processing unit through four groups of PCI-e x1 buses with 250MB bandwidths after passing the PXI-e bus, wherein the four groups of PCI-e x1 buses are collected by a bus controller. The central processing unit calls an IEC 61850 electric power communication protocol stack and an IEEE 1588 time tick communication protocol stack installed in a memorizer to solve the obtained data package through an RTOS, then, the central processing unit carries out operation analysis on data, and the data are sent to a device to be controlled through the bus controller by the PXI-e bus. The IEC 61850 electric power communication protocol stack and the IEEE 1588 time tick communication protocol stack are used for achieving timing with the external electric power protection device through an Ethernet interface, and therefore clock synchronization demands can be met. The relay protection controller has the advantages that nanosecond-level synchronization with signal acquisition and control board cards can be achieved, and clock precise synchronization of an electric power protection system can be achieved.

The invention provides a method for precisely scheduling uplink resources in intelligent network communication. The size of data cached by UE is expressed by cache size index columes in a BSR frame format, and under the larger cache condition, the resources are quite severely wasted. In order to effectively reduce the resource waste condition, the process for sending the report of the status of the uplink data cache domain includes the following steps of refining a cache size section corresponding to a large cache value, setting secondary tables respectively provided with 64 index values for all sub-sections of the cache size section respectively, determining whether to search the secondary tables through a reserved bit position in a sub-head-portion of an MAC control unit or not, and more precisely reflecting the information of the status of the uplink cache of the UE through a certain mapping rule. On the premise that no additional expenses are needed, user and wireless resource scheduling efficiency is improved, and the system resource utilization rate is effectively increased.

The present disclosure encompasses establishing and maintaining a routing protocol based on a measured link metric p, such as for a smart grid communication system. A link between a first node such as a router A and a neighbouring second node B of a communication path from a source to a destination in a packet oriented communication network is selected wherein the two nodes are connected via first and second communication links. An updated link metric p(t+1) at a point in time t+1 of the first communication link is determined. The first or the second communication link is selected for transmitting a further packet from node A to node B by comparing the updated link metric p(t+1) to a threshold pthr.