141 results about "National Grid" patented technology

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 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 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 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 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 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 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 discloses a data preprocessing method and relates to the field of machine learning, in particular to a method for processing acquired data before disaster risk prediction is performed ona power tower, a power transmission line and a power channel of a state grid, which comprises the following steps of: acquiring historical information, forming complete historical data, resampling the complete historical data, or selecting data characteristics to obtain a training set. The acquired data is processed, so that the data meets the prediction requirement.

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.