141 results about "National Grid" patented technology

The invention discloses an automobile charging system, and belongs to the technical field of new energy automobile charging. The automobile charging system mainly comprises a China power grid, a solarcell panel, a charging pile, an automobile and an APP terminal; the charging pile comprises a charging module, a monitoring module, a communication module, an interaction module, a data analysis module, a fee collecting module and an advertisement module; the APP terminal comprises an inquiry module, a reserving module, a location unit and a navigation unit; a user can inquire and reserve the charging pile, the charging pile can guide, recognize and monitor the automobile, estimate charging time and cost before charging and remind the user before charging is finished. The automobile chargingsystem has the advantages of being safe, stable, diversified in function and good in user experience.

The invention provides a low-voltage transformer area line fault positioning system based on intelligent circuit breakers. The system comprises a low-voltage transformer area distribution network anda monitoring center, wherein the intelligent circuit breakers have selectivity when encountering an electrical fault, and can freely set the tripping time or select different tripping times; the intelligent circuit breakers are used for setting the current-level circuit breaker close to the fault point to be tripped and opened preferentially when a line fault occurs between the two levels of intelligent circuit breakers, and sending the fault information to the monitoring center; and the monitoring center is used for acquiring the fault point information through an intelligent distribution transformer terminal TTU, sending an instruction to control the upper-level intelligent circuit breaker and the lower-level intelligent circuit breaker of the fault point to be opened, controlling an interconnection switch to be connected at the same time, supplying power to a fault-free area, and isolating the fault area. According to the invention, fault positioning of a distribution line of a public transformer area of the national power grid can be realized, the fault points of the transformer area are isolated, power supply is recovered outside the isolation area, the fault response speed isimproved, the fault influence is reduced to the minimum, the equipment is reasonably put into operation, and the equipment loss is reduced.

The invention discloses a user electricity consumption prediction method based on a Prophet-LSTM model, and the method comprises the following steps: S1, obtaining the historical data of the electricity consumption of a user through an intelligent electric meter, wherein the historical data comprise time series data, weather and temperature data, and holiday and festival data; S2, preprocessing and normalizing the historical data, wherein the original power consumption data is X={x1, x2,..., xn}, and the preprocessing of the original data comprises the processing of missing values, abnormal values, repeated values and invalid values; S3, constructing a Prophet prediction model, inputting the processed historical electricity consumption data X'={x'1, x'2,..., x'n} into the Prophet model, and performing Prophet prediction; S4, in order to prevent prediction overfitting, performing combined prediction in combination with an improved long and short term memory (LSTM) network model; and S5, measuring and verifying the fitting degree and the prediction effect of the combined model, and using common evaluation indexes. According to the method, the characteristics and rules of the power consumption data are analyzed, the accuracy of the prediction model is improved, and the method has important guiding significance for making effective power supply services by the state grid and each power supply company.

The invention discloses an intelligent testing device of a built-in load switch of an electric energy meter. The intelligent testing device of the built-in load switch of the electric energy meter aims to overcome the defects of existing technical equipment for detecting the electric energy meter. The intelligent testing device of the built-in load switch of the electric energy meter is composed of a computer, a control unit, a meter position display unit, a measurement channel switching unit, a load gear switching unit, a relay parameter measuring unit, a waveform monitoring unit, a withstanding voltage testing unit, a load unit and a load parameter measuring unit. The intelligent testing device of the built-in load switch of the electric energy meter has the advantages that testing of the load switch of the electric energy meter can be achieved, the service life of the built-in load switch of the electric energy meter can be predicted accurately and reasonably due to the fact that testing is carried out under the actual load condition, the testing efficiency is improved by 40% compared with that achieved manually, requirements of the State Grid Corporation of China are met, and potential safety hazards are reduced.

The invention discloses a power grid inspection and control platform based on interconnection of an unmanned aerial vehicle and VR (Virtual Reality), combined with an entire new biological inspectionmode of an internet plus, the unmanned aerial vehicle plus and the VR plus. The platform is researched based on a micro-service architecture, combined with equipment and software such as an inspectionunmanned aerial vehicle, an inspection remote controller, an inspection VR and an inspection image transmission numerical control center, so that power grid inspection is effectively and convenientlyrealized. The power grid inspection and control platform is characterized in that inspection tasks are carried out by adopting the following processing procedures including reappearance of live real-world scenarios through VR, filtration of collected data through an unmanned aerial vehicle terminal, receiving and sending of information through the image transmission numerical control center, finding and processing of defects / hidden dangers of inspection equipment, generation of inspection reports, convergence of the processing method of the defects / hidden dangers and reports into an intelligence knowledge base for statistic analysis, and the intelligence knowledge base as a reference is used for subsequent inspection, power grid construction and development. As the entire new inspection mode, the power grid inspection and control platform has the advantages of quickness, high working efficiency, high inspection quality, high security, labor power reduction, and real-world scenarios, and moreover, the platform is not affected by terrains; defects are recognized by using the unmanned aerial vehicle; the proportion of the defects which are positioned on bottle mouths of poles and towers and positioned on a part above the bottle mouths of poles and towers and which cannot be easily found is about 75 percent. The inspection efficiency and quality of the equipment are obviously improved, the labor strength is greatly reduced, the inspection efficiency is promoted, and the operation maintenance ability to states of the power grid equipment is ensured; therefore, application of the internet plus, the unmanned aerial vehicle plus and the VR plus is a more effective solution plan of power grid inspection intelligent development. Currently, a national power grid company takes aninspection operation of the unmanned aerial vehicle as a power transmission line lean assessment criteria, various units of a company system are widely applied to development line inspection of the unmanned aerial vehicle, and a prominent effect in the G20 summit meeting the, summit of BRICS, the national games and power maintenance work in the 19th CPC (Communist Party of China) national congressare achieved, and the inspection of the unmanned aerial vehicle becomes an indispensible means for operation and maintenance of the power transmission line. By combining the entire new biological inspection platform of an internet plus, the unmanned aerial vehicle plus and the VR plus with iterative updating inspection and overhauling operation mode of a new technology development trend, full-automatic and intelligent line operation management control is realized, so that the cost is reduced, the security of guarantee personnel is ensured, and the platform has wide application prospect; therefore, the development of the platform can greatly promote the development of the nationalelectric powerindustry in China.

The invention discloses an atmospheric environment chloride ion deposition rate testing device and method. The method comprises the steps of chloride ion deposition, chloride ion dissolution, chlorideion titration and blank sample determination, the chemical reagent silver nitrate used in the whole test process is low in toxicity, highly toxic and highly corrosive dangerous chemicals used in an existing method are avoided, and the test operation safety is high. The titration process is automatic, simple in flow and convenient to operate. The method can greatly save the test time, has high accuracy, reliability and safety, can quickly analyze and test a large amount of to-be-tested gauze in a short time, and improves the working efficiency of power grid atmospheric corrosion map construction of the State Grid Corporation of China.

The invention provides a brand-new high-energy-density energy-storing generating mode and relates to a melting phase-changing energy-storing generating system. By arranging an electric heating pipe, inferior electricity energy including wind electricity, solar electricity and the like and night low-ebb electricity are used for heating until energy-storing materials are melted and converted into heat energy for storing. A high-temperature-resisting and corrosion-resisting high-pressure flash pipe is installed in a melting tank, when heat energy needs to be converted into electricity energy, users only need to open a magnetic-control valve and guide in water, then the water can be instantly motivated and flashed to form over-saturated high-temperature high-pressure steam, the steam can react fast to start a heating power generator, and accurate output can be achieved through control. By means of the melting phase-changing energy-storing generating system, the world-wide puzzle of large-power energy storing can be solved thoroughly, and the melting phase-changing energy-storing generating system can have great effect in the fields of new energy grid connection, energy saving, emission reduction, peak clipping and ebb filling of the state grid and the like.

The invention provides a system and method for coproducing hydrogen and heat through water electrolysis on the basis of integrated renewable energy sources. The system comprises a renewable energy source power supply subsystem, a water electrolysis hydrogen production subsystem, a hydrogen production waste heat recycling subsystem, a new electrolysis water preheating subsystem, a regional heat supply network subsystem and a monitoring and dispatching subsystem. According to the invention, power is supplied by renewable energy sources; a storage battery stores off-peak electricity of the state grid and redundant renewable energy source electric quantity; power is supplied to a factory for hydrogen production via water electrolysis through the micro-grid; waste heat generated by gas and an electrolyte in an electrolysis process is recycled to a buried heat storage device; and hot water of a water return network is preheated through the buried heat storage device, and further heating is achieved through a gas turbine, so regional heating is achieved; and through recycling of waste heat of hydrogen production and cross-seasonal heat storage, hydrogen-heat co-production based on water electrolysis is achieved, the energy utilization efficiency of the hydrogen production factory is improved, and good application prospects are achieved.

The present invention relates to a hybrid energy system for charging an electric vehicle and a monitoring device thereof. The hybrid energy system comprises multiple solar arrays, a solar controller, an AC / DC rectifier controller, a battery pack, a DC / DC inverter controller and a DC charging pile, wherein, the solar controller is connected to the multiple solar arrays and is used for converting solar energy into direct current, the AC / DC rectifier controller is connected to the mains supply and is used for converting the alternating current into direct current, the AC / DC rectifier controller, the solar controller and the battery pack provide high voltage direct current to be the input of the DC / DC inverter controller, the DC / DC inverter controller outputs the direct current into the DC charging pile. According to the invention, through the isolation effect of the DC / DC inverter controller, the influence on the state grid is minimized when the DC charging pile or the electric vehicle is failed, the power supply safety of a non-electric vehicle and other important loads is ensured, and the operation safety of the whole system is improved.

The invention discloses a solar power road traffic system which is composed of a platform, an elevated photovoltaic power station, an elevated tracked wide electric power bus, an ordinary electric power bus and a control system. Through the elevated photovoltaic power station, a space above a road and solar energy resources are utilized to generate electricity, land area is not occupied additionally, and use functions of original land are not changed. Through the elevated tracked wide electric power bus, the vehicle is elevated and widened, the space above the road is utilized, a large quantity of passengers can be transported, and road congestion is reduced; a water storage tank and a liftable clean rotary brush are loaded in a vehicle body to be used for cleaning a solar cell panel, and the power generation capacity of the photovoltaic power station is improved. The elevated photovoltaic power station outputs power to the elevated tracked wide electric power bus, the ordinary electric power bus, a road traffic indicating lamp, a storage battery and a super-capacitor, redundant electric power is merged into a national power grid to be supplied to nearby residents, and the target of full utilization of renewable energy initiated by the nation is achieved.

The invention discloses a power system electricity utilization data statistical management system based on a block chain. The electricity utilization data statistical management system runs on each node of a bottom-layer block chain platform. The system comprises a user registration module, a user classification module, a user auditing module, a state grid, an early warning module and a consumption abnormality feedback module. According to the power system electricity utilization data statistical management system based on a block chain, abnormal data can be fed back in advance through the arranged early warning module, the early warning module carries out data comparison with data published by the state grid in the block chain network, compared data comprises daily power consumption dataand monthly and quarterly power consumption data, and a threshold is set for data comparison among the real-time daily, monthly and quarterly power consumption data, so that damage events are reduced,the record is more accurate, and the rights and interests of users are also ensured.

The invention discloses a national power grid lightning stroke prediction method, and relates to the field of machine learning, wherein the method is used for performing lightning stroke risk prediction on a power transmission line and a power tower pole of a state grid. The method comprises the following steps that historical information is collected, complete historical data is formed, the dimension of the complete historical data is a data feature, the data feature is selected, a Catboost model is trained, current information is collected, the complete current data is formed, and lightningstroke risk prediction is conducted through the trained Catboost model. The method provided by the invention can predict the probability and risk level of lightning stroke risks of the power tower pole and the power transmission line, and deploy countermeasures in advance.

The invention discloses a block chain multistage control load intelligent analysis module. The intelligent analysis module comprises a block chain monitoring platform, a state grid platform, a substation sub-meter, a community sub-meter and a home-entry meter. The state grid platform is connected with the block chain monitoring platform. The block chain monitoring platform is connected with the substation sub-meter, the community sub-meter and the home-entry meter. The substation sub-meter is also connected with the community sub-meter. The community branch meter is further connected with thehome-entry meter. Data are uploaded through mutual communication of the three electric meters, and are operated, analyzed and compared through the block chain technology. An orderly power utilizationscheme can be automatically compiled and optimized, automatic implementation, process tracking, automatic monitoring, electricity larceny prevention and effect evaluation are achieved, and intelligentmanagement of a demand side is achieved. According to a power transaction system based on the block chain, real-time collection and power payment real-time clearing settlement are realized through adoption of an intelligent contract. And energy digital precise management, electric energy digital capitalization and digital modeling of a power network are realized, and precise management is realized.

The invention discloses a micro-grid system, and relates to a power grid technology, in particular to a micro-grid system. A micro-grid low-voltage power supply bus is connected in parallel through agrid-connected inverter, boosted to 10KV through a power supply transformer, and connected in a state grid. The microgrid system not only can realize stable power supply in the grid, but also can be stably butted with a large power grid system. The system comprises a photovoltaic power generation system, a diesel generator system and a battery energy storage system, wherein the photovoltaic powergeneration system and the diesel generator system are used as distributed power supplies; the whole microgrid system is divided into six modules. The system comprises a reference power supply module,a photovoltaic power generation and grid-connected control module, a diesel generator and an intelligent control system module thereof, an energy storage system and an intelligent management module thereof, a load intelligent management module and a system grid-connected module. As a complete power system, functions of power balance control, system operation optimization, fault detection and protection, electric energy quality management and the like are realized by means of self-control and management energy supply.

The invention belongs to the technical field of intelligent operation and maintenance management of the Internet of Things, and particularly relates to a big data-based intelligent monitoring and analyzing system for power transformation equipment, which comprises a central monitoring system and a terminal system, the central monitoring system is mainly used for completing multi-source data accessand storage, providing an analysis process rapid construction function and calling the packaged analysis algorithm service to carry out multi-dimensional and multi-scale correlation analysis on the data; meanwhile, functions of global monitoring, remote maintenance, power supply management and control, safety control, fault analysis and prediction are provided through the service subsystem; and the terminal system is mainly responsible for performing encryption, data retransmission control and data source interface adaptation on local data of the transformer substation, and sending the data to the data acquisition server through two access modes of VPN wired and GPRS wireless. The invention is high in operation and maintenance efficiency, can effectively improve the operation and maintenance management level of the State Grid Corporation of China, reduces the operation and maintenance cost, and can achieve the global monitoring and fault prediction and diagnosis of various types of electrical equipment.

The invention discloses an active cooling type outdoor power distribution box for the state grid. The power distribution box comprises a box body, the box body is arranged on the ground, a power distribution chamber is arranged in the box body, openings are formed in the inner walls of the two sides of the power distribution chamber, ventilation nets are installed in the two openings, and a vertical cavity, an annular cavity and a mounting cavity are formed in the box body. The annular cavity is located on the outer side of the vertical cavity, and the mounting cavity is located below the vertical cavity; and a wind power triggering module comprises a rotating rod vertically arranged in the vertical cavity, and the upper end and the lower end of the rotating rod are rotationally connectedwith the inner top and the inner bottom of the vertical cavity correspondingly. The power distribution box is provided with an active heat dissipation mechanism, external wind can be converted into cold wind and then the cold wind is injected into the power distribution box body, the heat dissipation effect is extremely good, and meanwhile, an electrostatic dust collection module is further arranged to filter dust in air entering the box body, so that the dust is prevented from being attached to electrical elements.

The invention discloses an electric vehicle charging station dynamic pricing method for regulating and controlling electric energy quality. The method is mainly used for solving the problem that a plurality of national grid electric vehicle charging stations exist in a region, based on historical operation data of a charging station, the demand response of a user is simulated according to the comprehensive cost of charging different charging stations by an electric vehicle user, and the effect of regulating and controlling the electric energy quality is achieved by formulating a reasonable service fee price, so that the influence of network loss and voltage deviation caused by access of an electric vehicle load to a power grid is minimized. User demand response is simulated through specific factors influencing user decision making, and under the situation that the same operator manages and operates the charging station, on the premise that the total revenue is not changed by formulating the reasonable service fee price, the influence of the electric vehicle load on the electric energy quality of the power grid can be reduced.

The invention discloses a national power grid tree line discharge prediction method, relates to the field of machine learning, and is used for carrying out tree line discharge risk prediction on a power tower pole, a power transmission line and a power transmission channel of a state grid. The method comprises the following steps: collecting historical information, forming complete historical data, carrying out resampling on the complete historical data, training a LightGBM model, collecting current information, and forming complete current data; and performing tree line discharge risk prediction by using the trained LightGBM model. The method provided by the invention can predict the probability and the risk level of the tree line discharge risk of the power tower pole and the power transmission line, and deploy corresponding measures in advance.

The invention relates to a mobile application information security system for a power system, and solves the shortage of the prior art. The technical scheme is as follows: the mobile application information security system comprises internal and external networks of the national grid, a power wireless private network and an intelligent mobile terminal; the intelligent mobile terminal is in communication connection with the internal and external networks of the national grid through the power wireless private network; the intelligent mobile terminal comprises a security encryption chip, a face recognition module and a private network communication module; the private network communication module is connected with the face recognition module and the security encryption chip; and the private network communication module is in communication connection with the power wireless private network. The power wireless private network can realize two-way transmission of data, voice and video. Just because of the specificity, the confidentiality and security of data transmission can be guaranteed.

According to a green energy device, inexhaustible kinetic energy (also called 'ocean energy' ) formed by ocean current movement caused by natural tide of the sea is used as an original power resource for power generation, collision and energy storage between barge power generation equipment and tidal water flow on the sea are solved by adopting a single-point mooring device, and no matter flood tide or ebb tide, a barge performs 360-degree stepless disordered rotation along single-point mooring through a shaft sleeve (knuckle), a power generator which is installed in a multi-group or matrix manner generates 600V three-phase electricity under the action of ocean current, the 600V three-phase electricity is boosted to 60KV and then passes through a single-point mooring electric slip ring, and the electric energy is converged into an offshore power generation general field through a submarine cable and then is merged into the state grid to be transmitted to users.

The invention discloses an intelligent substation intelligent terminal switching-in action voltage automatic test method and system. The method comprises the steps: making a direct-current power supply introduced into a tested device, controlling closing of a switching-out contact to realize automatic switching in / out and switching of the direct-current power supply, realizing a GOOSE message output by the tested device, monitoring signal change of the GOOSE message, and judging whether a switching-in action voltage threshold of the tested device meets the standard requirement or not. According to the intelligent substation intelligent terminal switching-in action voltage automatic test method and system, the switching-in action voltage can be automatically tested, a closed-loop test can be carried out, meanwhile, a test result can be automatically stored, a detection report can be automatically generated, manual operation is avoided, the working efficiency is improved, and the test period is shortened. Meanwhile, the method is already applied to intelligent terminal device testing of the state grid and the southern grid, and through testing verification, the testing efficiency isimproved, the testing period is shortened, and the quality and operation reliability of field products are improved.

The invention provides a novel alternating-current magnetic field influence testing device. The device is composed of a main control unit, a gauss meter, a standard electric energy meter, a three-phase power source, a constant flow source, a Helmholtz coil unit, an intelligent mechanical unit, a man-machine interaction unit, a safety protection unit, a power source unit and a communication unit. According to the device, combined control of all the units is achieved, collection and processing of feedback data and signals are achieved, and generation of a regional magnetic field is achieved; meanwhile, meter calibration, automatic coil rotating, real-time magnetic field monitoring, event recording and intelligent control are achieved, the frequency and source of the three-phase power source for meter calibration and the frequency and source of the constant flow source generated by the magnetic field are identical, and the requirements of the national standard and the standard of the State Grid Corporation of China for an intelligent ammeter which is used for external alternating-current magnetic field influence testing are met.

The embodiment of the invention discloses a grid-based high-temperature real-time early warning publishing and displaying method, system and equipment. The method comprises the steps that the real-time air temperature of grids of 1 degree * 1 degree nationwide is collected, positioning information of each grid is displayed in an ArcGIS map through coordinate transformation, and an air temperaturemap layer is established on the map; and according to the real-time air temperature of each grid and a pre-formed high-temperature early-warning grade standard, the national grid high-temperature early-warning grade of 1 degree * 1 degree is published and displayed in real time on the air temperature map layer. According to the technical scheme provided by the embodiment of the invention, the basic air temperature difference between grids of each region is considered, and the accuracy of high-temperature early warning release and display under different grids is improved.

The invention relates to a commercial power solar charging module sharing system, belongs to the technical field of power sharing and is to solve the problem of great influence on users during power failure of a power grid in the prior art. The system comprises power storage equipment, solar power generation equipment and a data summarizing and processing module. According to the invention, the electricity demand of the user and the power supply quantity of the user can be determined according to historical electricity data and power generation data of the user, so that a state grid company can determine when to cut off the power according to the electricity demand of the user and the power supply quantity of the user to cause less influence on the production and life of the users.

The invention discloses an electric power communication optical cable external-damage-prevention alarm device, and belongs to the field of state grid safety facilities. A solar cell panel is used forcharging a lithium ion battery, the lithium ion battery provides power supply for a circuit board through a power line, and an antenna is used for transmitting an enhanced signal when a wireless transmission signal is weak; the output end of the sensor is connected with a signal processing module, and data monitored by the sensor can be output to the signal processing module for data processing; and the signal transmission module can transmit the signals processed by the signal processing module through a VPN channel and finally gather transmission information to a monitoring platform. According to the invention, troubleshooting and first-aid repair time of optical cable faults is greatly shortened, stable operation of important services such as protection and stability of a power line isensured, and safety risks of a power grid are reduced.

The invention discloses a power distribution terminal safety detection system and method based on assembly line automatic operation. The system comprises a power distribution terminal assembly line, asafety detection platform and a safety detection comprehensive management and control platform. When the power distribution terminal is subjected to safety detection, the robot and the assembly linerealize online and offline and wire plugging and unplugging processes of the detected terminal, the safety detection platform realizes safety capability detection, and the comprehensive management andcontrol system realizes information interaction in the detection process, so that full-automatic safety detection of the power distribution terminal is realized. Through the research of the invention, a set of complete, efficient and reliable full-automatic detection system and method is provided for the information security of the power distribution terminal, support is provided for the improvement of new-generation power distribution network construction security protection measures of the State Grid Corporation of China, and the information security assurance activity better follows the concept of PDCA cyclic science construction.

The invention belongs to the technical field of electric vehicle charging stations, and particularly discloses a semi-off-grid wind-solar complementary charging station which comprises a power supplysystem, an intelligent management system, an energy storage system and a charging pile charging system, and is characterized in that the power supply system comprises a wind power generation system, aphotovoltaic power generation system and a state grid power supply system. The charging station has low dependence on the power grid, Stepped utilization of retired power batteries can be realized, peak clipping and valley filling are carried out on the power grid, and the expenditure of an electric vehicle user is reduced and the remaining electric quantity is transmitted to the grid.