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1185 results about "Smart grid" patented technology

A smart grid is an electrical grid which includes a variety of operation and energy measures including smart meters, smart appliances, renewable energy resources, and energy efficient resources. Electronic power conditioning and control of the production and distribution of electricity are important aspects of the smart grid.

Multipurpose, universal Converter with battery control and real-time Power Factor Correction.

The Electric Power Converter has the qualifications for an uninterruptable power supply, battery management, energy conversion, micro-grid formation, Power Factor Correction including Total Harmonic Distortion correction in real time. Uninterruptable power supply's use is for always-on, real-time, all-time, reduced distortion with functions of load reduction and management during peak load events. The Electric Power Converter as well has the ability to provide maintenance for most types of batteries including charging and discharge regiments to increase the overall lifetime of a battery, the maintenance, incorporating restorative functions that can refurbish dead batteries or can further increase the overall efficiency and useful function of weaker/aged/defective batteries. Energy conversion capabilities allow for the conversion of AC or DC to AC or DC with high efficiency and ability to actively vary the frequency in accordance to the required parameters. The Electric Power Converter is able to establish and sustain a micro-grid with multiple and varying sources of power generation and load conditions. The Electric Power Converter is achieving dynamic, real-time, interactive Power Factor Correction (PFC) function with advanced voltage harmonic distortion correction with a high efficiency ratio. The Electric Power converter is designed to function with the emerging Smart Grid technologies and provide an overall higher level of operating efficiency and higher quality of electrical power.
Owner:3DFS L L C

Integrated management system of intelligent power grid

This invention relates to an integrated management system of intelligent power grid; the integrated management system disclosed by this invention comprises a plurality of sensor terminals which are connected mutually through sensor network and are used for obtaining the equipment or environment information of a transmission link, a power transformation link, a distribution link and a power utilization link; pre-posed application servers which are connected mutually through a MIS (Management Information Service) bus and are used for interacting information with the sensor network and providing the application service of each link and across-links according to the equipment or environment information of the transmission link, the power transformation link, the distribution link and the power utilization link; and a management application platform capable of interacting with a plurality of pre-posed application servers and providing the integration task and data sharing of the application service of the transmission link, the power transformation link, the distribution link, the power utilization link and the across-links. According to the integrated management system disclosed by this invention, a data sharing and integration processing system of the transmission link, the power transformation link, the distribution link and the power utilization link is established based on the sensor network so as to realize to manage and monitor electric power resource; the redundancy of a working procedure is reduced; and working efficiency is increased.
Owner:STATE GRID INFORMATION&TELECOMM +1

Method for establishing virtual reality excavation dynamic smart load prediction models

The invention discloses a method for establishing virtual reality excavation dynamic smart load prediction models. The method includes the steps that the knowledge excavation technology is adopted so that a virtual reality analysis environment can be formed, the influence relation between fixed quantities is explored, and an input variable candidate set is determined; smart load prediction models of a support vector machine of a self-adaptive structure and an Elman neural network and the like are established, wherein input variables are determined by the support vector machine through the attribute screening technology and parameters are optimized by the support vector machine through a flora tendency differential evolutionary algorithm; a region load smart load prediction model based on data slice excavation is established; a load curve prediction model combined with dynamic electrovalence factors, user characteristics and the user response electric quantity is established, so that linked correcting prediction of loads, electrovalence and the response electric quantity is achieved. According to the method, the prediction models suitable for the actual condition of a smart power grid of China are established, the scale of construction of renewable energy sources is reasonably planned, more efficient power utilization of users is facilitated, and reasonable arrangement of power supply resources of power enterprises is facilitated.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Charging-discharging system for V2G bilateral power conversion electric automobile and control method thereof

The invention discloses a charging-discharging system for a V2G bilateral power conversion electric automobile and a control method thereof, which belong to the technical field of intelligent power grids. In the charging-discharging system, a single-phase or three-phase voltage PWM (Pulse Width Modulation) converter (VSC) is taken as a first-grade power conversion circuit, so that energy conversion between an alternating-current power grid and a first direct-current bus is realized; and a symmetric half-bridge LLC (Logical Link Control) resonant bilateral direct current-direct current (DC/DC) converter is taken as a second-grade power conversion circuit, so that energy conversion between a direct-current bus and a power battery pack is realized. The charging-discharging system has the beneficial effects that: the current of the converter power grid side of the first-grade power conversion circuit is approximate to sine wave, so that the harmonic content is small; and the converting efficiency, dynamic performance and power density of the second-grade power conversion circuit are increased, the volume and weight of a charging-discharging device of the electric automobile are reduced, and the safety, reliability and economic efficiency of the system are improved effectively.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Web of Things smart power grid operation and maintenance system

Provided is a Web of Things smart power grid operation and maintenance system. The Web of Things smart power grid operation and maintenance system comprises a front end integration monitoring device, a power supply device, a monitoring host machine and a monitoring center, the monitoring host machine is in charge of receiving collection data sent back by the front end monitoring device, and filtering, temporary storing and uploading the received data to a database server of the monitoring center, and meanwhile in charge of receiving, analyzing, and distributing commands issued by the monitoring center, the database server, a streaming media server and an application server of the monitoring center are all communicated with the monitoring host machine through a wireless network gateway, a Web of Things smart power grid operation and maintenance platform is operated on an application terminal, and the Web of Things smart power grid operation and maintenance platform comprises an electronic map, a monitoring alarm module, a device failure alarm module, an action with alarm module, a device management module and a statistic analysis module. The Web of Things smart power grid operation and maintenance system has the advantages of being small in size, light in weight, convenient to install, ultra-low in power consumption, and high in automation degree and intelligent degree.
Owner:合肥未来计算机技术开发有限公司

Dynamic layer diagnostic device and method of smart power grid fault

A dynamic layer diagnostic device for smart power grid fault comprises a data collection and monitoring unit, a data processing unit, a data base unit, a communication unit and a man-machine interaction unit. A dynamic layer diagnostic method includes: when a smart power grid breaks down, calculating fault diagnosis starting conditions to conform a diagnosis strategy, wherein the fault diagnosis strategy comprises switch layer diagnosis, feeder layer diagnosis and transformer substation layer diagnosis; starting the switch layer diagnosis when changes of switch motion information are remarkable before and after the fault; starting the transformer substation diagnosis when changes of electricity amount information are remarkable before and after the fault; stopping the diagnosis when a fault element is the only one element during the diagnosis of the switch layer; otherwise, retrieving the switch historical action recording, and starting the transformer substation diagnosis when recording matched with the current switch action exists; and otherwise, starting the feeder layer diagnosis. The dynamic layer diagnostic method performs layering analysis on the fault, fully utilizes various fault information and improves fault diagnosis accuracy according to different characteristics of multisource information after the power grid fault and difficulty layer in obtaining and processing of various information.
Owner:SHENYANG POWER SUPPLY LIAONING POWER +2

Intelligent cubicle switchboard oriented to intelligent power grid and operating and controlling method thereof

The invention discloses an intelligent cubicle switchboard oriented to an intelligent power grid and an operating and controlling method thereof. The cubicle switchboard comprises an intelligent cubicle switchboard monitoring unit, a temperature and humidity detecting unit, an intelligent measuring and controlling unit, a mechanical characteristic on-line monitoring unit, an insulation on-line monitoring unit, a video monitoring unit, a cubicle switchboard inner environment control unit, a human-computer interface unit, a station level monitoring system, a system power supply unit, a network communication unit and a carrier communication unit. The method comprises the following steps of: monitoring and controlling primary equipment by using the intelligent cubicle switchboard monitoring unit; detecting and regulating the temperature and the humidity in the cubicle switchboard; displaying and adjusting parameters by using the human-computer interface unit; communicating with an intelligent device of the intelligent power grid; displaying video information of the primary equipment in the cubicle switchboard; and communicating the network communication unit with a higher lever monitoring system. The invention can realize intelligent control, mechanical characteristic on-line monitoring, insulation on-line monitoring, video monitoring and quick and reliable communication.
Owner:SHANGHAI LANJIAN ELECTRIC EQUIP CO LTD

Virtual synchronous generator virtual inertia and virtual damping coefficient adaptive control method

The invention provides a virtual synchronous generator virtual inertia and virtual damping coefficient adaptive control method, which relates to the technical field of smart grid and intelligent algorithms. Firstly, the inverter based on the virtual synchronous generator is modeled, and the correlation between the output frequency of the inverter and the virtual inertia J and the virtual damping coefficient D is obtained. Then the fitness function of the adaptive control method of virtual inertia J and virtual damping coefficient D based on the improved particle swarm optimization algorithm isdetermined. Finally, the improved particle swarm optimization algorithm is applied to the active power. In the frequency control part, the real-time adaptive control of virtual inertia J and virtualdamping coefficient D is realized in order to minimize the frequency deviation and stabilize the system. The invention provides a virtual synchronous generator virtual inertia and virtual damping coefficient real-time adaptive control method, which fully utilizes the characteristics of the virtual inertia and introduces the virtual damping coefficient, so that the inverter is more stable and the frequency offset is smaller.
Owner:NORTHEASTERN UNIV

Semi-liquid metal electrode energy storage battery

The invention relates to a semi-liquid metal electrode energy storage battery, belonging to the field of an energy storage battery, and aiming at solving the problems that the all-liquid metal battery is narrow in battery material selection range and high in running temperature, and has potential safety problem. The semi-liquid metal electrode energy storage battery comprises a shell, a positive pole, electrolyte, a negative pole and a collector, wherein the positive pole is alloy made from one or more of Sn, Sb, Pb, Bi and Te; the negative pole is alloy made from one or more of Li, Na, Mg and Ca; and the electrolyte is a mixture of inorganic salt mixture and ceramic powder. When the semi-liquid metal electrode energy storage battery runs, the positive pole is in a semi-liquid state structure with alloy solid phase distributed in liquid phase, and the electrolyte is melted into semi-liquid state paste, so that the short circuit of the positive pole and the negative pole can be effectively prevented, the energy storage cost is lowered, the working temperature of the battery is reduced, the corrosion speed of the shell is slowed down, the service life of the battery is prolonged, the safety and the reliability of running can be improved, and the semi-liquid metal electrode energy storage battery is suitable for storing energy for new energy power generation grid-connection, frequency modulation and peak-load regulation of an electrical power system as well as smart power grid construction.
Owner:HUAZHONG UNIV OF SCI & TECH

Intelligent power grid distributed self-supporting photovoltaic power supply system

The invention discloses an intelligent power grid distributed self-supporting photovoltaic power supply system. The system comprises a central controller, a DC/DC (direct current to direct current) direct chopper circuit, a power dispensable circuit, a DC/AC (direct current to alternating current) bidirectional inverter circuit, an island detection circuit and an energy accumulator, wherein the central controller is used for collecting data in real time, and controlling the DC/DC direct current chopper circuit, the power dispensable circuit, the DC/AC bidirectional inverter circuit, the island detection circuit and the energy accumulator through analytic calculation, so that the seamless switching between synchronization network and off network can be realized, the synchronization mode operation when a public utility grid is normal can be guaranteed, the system can quickly perform the automatic off-line and off-network mode operation when power is down, the remote dispatching acceptability to a public power grid, the power interaction between the system and the power grid, the off-peak power consumption of load and economical operation of the system can be realized, the power supply quality can be improved, the safety and the reliability of loaded power consumption can be guaranteed, the spontaneous self-supply rate of the system can be improved, and the impact of intermittency and fluctuation of photovoltaic power output to the power grid can be reduced.
Owner:SHANDONG SACRED SUN POWER SOURCES

Net load interaction multi-dimensional operation system based on smart power grids

ActiveCN103257636ACarry out the work requirements of "two transformations"Achieving two-way flowTotal factory controlProgramme total factory controlSmart gridMulti dimensional
The invention provides a net load interaction multi-dimensional operation system based on smart power grids. The net load interaction multi-dimensional operation system based on the smart power grids comprises a scheduling master station, a user substation, a communication net mobile terminal and a public network on-line device. The scheduling master station is used for formulating a scheduling policy through energy efficiency analysis and simulation modeling, obtained scheduling policy information is sent to the user substation which is installed on a user side through a transport layer. The user substation carries out self energy management, receives and processes the scheduling policy and then sends the scheduling policy to the communication net mobile terminal. Due to the fact that the communication net mobile terminal controls the user substation, an energy optimizing strategy and inquiry and management of a load power utilization condition and an operation state are achieved. The public network on-line device is used for supplying data and policy information to the scheduling master station through the transport layer and supplying electricity consumption information and service to public network users. The system arranges various terminal devices arranged in a scheduling data network, an information inner network, a public network, a communication network and an electric grid in different networks, interconnection and collaborative operation are carried out on the system to achieve intelligent demand response and construction of a demand side optimizing operation system.
Owner:STATE GRID CORP OF CHINA +1

Smart grid-oriented power quality monitoring system and method

ActiveCN102053202AMeet monitoring requirementsMeet Coordinated MonitoringTransmission systemsElectrical testingData compressionPower quality
The invention provides a smart grid-oriented power quality monitoring system and a smart grid-oriented power quality monitoring method, which relate to the field of monitoring of power quality. The system comprises a distributed online/offline node detection module, a network communication module, a distributed database module and a comprehensive management module of the power quality monitoring system, wherein the distributed online/offline node detection module comprises a parallel analog-to-digital conversion module and a signal processing module so as to realize distributed detection of asmart grid. In the technical scheme provided by the invention, a plurality of analog-to-digital conversion chips are connected in parallel and an analog signal is sampled, so that high-accuracy sampling rate of signals is increased and the detection requirement on transient power quality signals is met; based on a programmable logic chip, online analysis and data compression are realized by a parallel signal processing algorithm; a distributed database is adopted, so that system reliability is enhanced and system upgrade is promoted; and a global positioning system (GPS) and a communication network module are adopted, so that a distributed network system is realized, and power quality monitoring of the smart gird is supported powerfully.
Owner:PONOVO POWER
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