25 results about "National Grid" patented technology

Sensored insulation plug for a medium voltage or high-voltage separable connector in a national grid, and operable to insulate a connection element of the separable connector on an elevated voltage and to simultaneously detect and sense the elevated voltage. The sensored insulation plug comprises a) a plug body formed by a solidified insulating material, b) an externally accessible detection contact, c) a primary capacitor, operable as a high-voltage capacitor in a sensing voltage divider for sensing the elevated voltage, the primary capacitor having i) a high-voltage electrode; ii) a sensing electrode embedded in the plug body; iii) a dielectric formed by a first portion of the insulating material, and d) a testpoint capacitor, operable as a high-voltage capacitor in a detection voltage divider for detecting the elevated voltage and comprising i) the high-voltage electrode, ii) a testpoint electrode, embedded in the plug body and electrically connected to the detection contact, and iii) a dielectric formed by a second portion of the insulating material.

The invention discloses a photovoltaic snow covering depth and power loss forecasting method and system based on multi-source data fusion, and belongs to the technical field of photovoltaic power forecasting. The problems of high-precision accumulated snow influence assessment, short-term risk early warning and power loss quantitative prediction of a photovoltaic system in cold and alpine regions are solved. The method comprises the following steps: selecting three numerical weather forecasting modes, namely a global forecasting system operated by the National Environmental Forecasting Center, a wind energy and solar energy forecasting system of the China Meteorological Administration and a unified mode weather forecast of the British Meteorological Administration, acquiring weather forecasting data, performing unified space-time interpolation, abnormal value correction and unit conversion, and then performing set averaging to obtain a set average value; ensemble forecast data is obtained; based on a temperature-irradiance condition and a friction force mechanism, an accumulated snow covering model is constructed, a photovoltaic panel snow covering range and photovoltaic power loss are obtained, early warning information of snow covering time, duration and power loss is generated through matching of station longitude and latitude and national grid forecasting, and photovoltaic snow covering depth and power loss forecasting based on multi-source data fusion is completed.

The application discloses an IP68 high-protection electric energy meter module bin and a glue filling process thereof, and belongs to the field of single-phase intelligent electric energy meters of State Grid, wherein the module bin comprises a meter cover and a flip cover, the meter cover is provided with a containing bin, the flip cover is provided with a sealing ring, the sealing ring is in abutment with the inner wall of the containing bin, an annular step corresponding to the flip cover is arranged in the containing bin, an elastic sealing ring is embedded on the annular step, and the meter cover is in corresponding cooperation with the elastic sealing ring. The purpose of the application is to design a secondary sealing at the module bin position of the flip cover and the meter cover without changing the size structure of the electric energy meter, so as to improve the sealing effect between the transparent flip cover and the meter cover.

The application relates to a work ticket content recommendation method for intelligent operation and maintenance, which comprises the following steps: S1: uniformly accessing maintenance related data to an unstructured component of a national grid data middle platform, and completing quality evaluation of related files by a quality detection tool; S2: after uniform access, the unstructured component carries out text extraction on document type data uploaded to the unstructured component to form to-be-labeled data through an xxl-job distributed task scheduling system; S3: adopting a bart labeling technology of a Transformer to carry out text labeling on the to-be-labeled data and positioning core content of a work ticket; S4: constructing a work ticket content automatic recommendation model based on a time sequence prediction LightGBM neural network, and carrying out API encapsulation and containerization deployment; and S5: integrating the work ticket content automatic recommendation model with a business system in a micro-service mode, and recommending work ticket preparation content in real time according to problem description uploaded by an operation and maintenance personnel. The application realizes real-time recommendation of high-quality work ticket content.

• National energy supply system comprising several G-Dual power plants operating on glycerin as the main fuel and a pilot fuel, with each power plant providing an electrical output of 5 to 200 MW and feeding into a national high-voltage grid (110-380 kV).

The invention discloses a state grid marketing business auditing method and system based on multi-source monitoring, and the method comprises the steps: S1, collecting multi-source monitoring data of automation and video monitoring, and carrying out the correlation preprocessing of key entities, and obtaining business behavior data; s2, acquiring an electric quantity mutation index from the service behavior data, acquiring an event sequence vector based on the service behavior data, constructing an event time sequence convolutional network model based on the event sequence vector, and outputting an operation event association degree of the service behavior data based on the event time sequence convolutional network model; s3, based on the electric quantity mutation index and the operation event correlation degree, an initial risk value is output by constructing a collaborative risk fusion network based on sparse excitation, risk conduction and traceability analysis is executed based on the initial risk value, and a business dynamic risk portrait of the audit object is obtained; and S4, based on the business dynamic risk portrait of the auditing object, realizing marketing business auditing through intelligent distribution of auditing tasks and accurate recommendation of auditing strategies.

The invention discloses a photovoltaic wind power green electric power reprocessing stable alternating current grid-connected system and method, and belongs to the technical field of electric power system grid connection. The system comprises a photovoltaic wind power generation module, an inverter module, an electric power reprocessing system module and a grid-connected module which are connected in sequence, the photovoltaic wind power generation module generates direct-current power, and the direct-current power is converted into alternating-current power through an inverter and then input into the power reprocessing system module; the electric power reprocessing system module is arranged near a wind-light electric field and comprises a 125-meter-high closed overhead viaduct, a 20-ton-level full-automatic driving energy vehicle, a rail, a power supply circuit, a suspension bridge, a control center, a power generation area and the like, and the energy vehicle circularly runs onto the bridge deck along the rail and is lifted down through the suspension bridge to drive a generator to convert unstable electric power into stable alternating current; and the stable alternating current is accessed to the state grid through the grid-connected module and is transmitted through extra-high voltage. The problems of photovoltaic wind power integration absorption and power abandoning are thoroughly solved, productivity is released to promote green power leap-type development, the proportion of clean energy exceeds 60%, the electric power structure is optimized, China is assisted to become an electric power strong country, and the method is suitable for large-scale popularization.

The invention is applicable to the technical field of cable transportation, and provides electric wire and cable transportation equipment for national grid construction, which comprises a support module, a hydraulic support leg and rollers, the support module comprises a middle support plate, a rear support plate and a front support plate, and the hydraulic support leg is mounted at the bottom of the middle support plate. The two pairs of rollers are installed at the bottoms of the rear supporting plate and the front supporting plate respectively, the rotating assembly is installed on the rear supporting plate and used for enabling the cable pay-off reel to rotate in the equipment, and the rotating assembly comprises a rotating shaft rotationally connected to the interior of the rear supporting plate; the cable pay-off device has the beneficial effects that when too many cable pay-off parts do not need to be used, the pay-off reel rotates reversely on the device to enable the paid-off cable to be wound on the pay-off reel again, at the moment, due to the fact that the lead frame slides on the reciprocating lead screw in a reciprocating mode, the cable can be evenly wound on the pay-off reel, and the cable pay-off efficiency is improved. And stacking of the cables on the pay-off reel caused by manual cable returning is avoided.

The application provides a refrigerator reservation ice making method and a refrigerator. The method comprises the following steps: obtaining a use parameter of the refrigerator, the use parameter comprising position information and a reservation ice taking time point; determining a time-of-use electricity price area where the refrigerator is located based on the position information; obtaining electricity price information of the time-of-use electricity price area, and determining a time-of-use electricity price peak period start time point and a time-of-use electricity price valley period start time point according to the electricity price information; determining a start ice making time point based on the reservation ice taking time point, the time-of-use electricity price peak period start time point and the time-of-use electricity price valley period start time point. The application combines the time period of the time-of-use electricity price of the time-of-use electricity price area, the reservation ice taking time point, the current time point and the required ice making duration, reasonably selects the start ice making time point, realizes intelligent regulation and control of the refrigerator ice maker, and meets the demand for reservation ice making while saving electricity charges and reducing the pressure on the power supply network of the national power grid.

A sensored insulation plug for a medium-voltage or high-voltage separable connector in a power distribution network of a national grid, and operable to insulate a connection element of the separable connector on elevated voltage and to sense the elevated voltage. The sensored insulation plug has an outer shape generally symmetrical about a plug axis defining axial directions and radial directions, and comprises a plug body formed by an insulating material, and a primary capacitor, operable as a high-voltage capacitor in a voltage divider for sensing the elevated voltage. The primary capacitor has a high-voltage electrode for direct electrical connection to the elevated voltage, a sensing electrode of a tubular shape, embedded in the plug body, arranged around the high-voltage electrode and extending, in axial directions, between a first axial edge position (B) and a second axial edge position (A), and a dielectric formed by a portion of the insulating material arranged between at least a portion of the sensing electrode and at least a portion of the high-voltage electrode. A shield electrode of generally tubular shape, embedded in the plug body, is arranged around the sensing electrode and extending in axial directions at least between the first axial edge (B) position and the second axial edge position (A), and comprises a protruding portion extending in axial direction beyond the first axial edge position (B), such as to enhance electrical shielding, by the shield electrode, of the sensing electrode against external electrical fields.

The application discloses a kind of national power grid equipment fire risk assessment method and system, it is related to power grid equipment fire-fighting technical field, including collecting target power grid equipment historical operation cycle within the equipment ontology monitoring time sequence, operating environment perception information set and external meteorological condition record set;Equipment ontology monitoring time sequence and operating environment perception information set are calculated by spatiotemporal correlation matching, and the equipment-environment joint feature sequence of spatiotemporal alignment is generated;Typical operating state mode of the sequence is mined and key feature vector is extracted;Risk coupling graph model of equipment operating state and external meteorological condition is constructed based on key feature vector;The probability distribution of equipment high fire risk state under specific meteorological condition is calculated using the model, and a dynamic fire risk assessment report is generated.The method realizes multi-source data fusion and risk accurate quantization, improves the accuracy and dynamics of power grid equipment fire risk assessment.

The utility model relates to an air source heat pump unit with a peak-valley electricity control strategy. The air source heat pump unit comprises a four-way valve, a compressor assembly, an evaporator, a heat exchanger, an energy storage water tank, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a sixth electromagnetic valve, a port a, a port b, a port c and a port d are formed in the four-way valve, an inlet of the compressor assembly is communicated with the port b of the four-way valve, an outlet of the compressor assembly is communicated with the port d of the four-way valve, and an outlet of the evaporator is communicated with the port c of the four-way valve. The method has the advantages that the air source heat pump unit with the peak-valley electricity control strategy can make proper operation logic according to the peak-valley electricity price of the state grid, the heat storage property of the air source heat pump is utilized to the maximum extent, valley electricity is utilized to the maximum extent for heating, and the purposes of reducing the operation cost, balancing the load of the grid and reducing carbon emission are achieved while the heat utilization requirements of customers are met.

A sensored insulation plug for insertion into the rear cavity of a medium or high-voltage separable connector in a national grid power distribution network. The sensored insulation plug insulates a connection element on elevated voltage and senses the elevated voltage. The insulation plug features a rotationally symmetric body made of electrically insulating material. The sensored insulation plug includes an integrated sensing capacitor functioning as a high-voltage capacitor in a sensing voltage divider, with a high-voltage electrode, in use connected to the connection element, and a sensing electrode embedded in the insulating material. The dielectric of the sensing capacitor is formed by a portion of the insulating material. The insulation plug also has a circuit board with a signal contact connected to the sensing electrode and further includes a temperature sensor disposed on the circuit board.

Bushing for connecting a separable connector to a switchgear or to a transformer in a national grid for distributing electrical power at medium or high voltages. The bushing comprises a) a bushing body of a solidified, electrically insulating casting material; b) a bushing conductor, embedded in the casting material, for conducting power at medium or high voltages into the switchgear or the transformer, and c) an integrated primary capacitor, operable in a high-voltage portion of a voltage divider for sensing a voltage of the bushing conductor. The primary capacitor comprises a low-voltage electrode, a high-voltage electrode and a dielectric. The high-voltage electrode is a section of the bushing conductor. The low-voltage electrode is embedded in the casting material and comprises a circumferential wall surrounding the bushing conductor and forming a cavity. The dielectric is formed by a portion of the casting material arranged in the cavity. The circumferential wall comprises a mesh of conductive wires forming a plurality of apertures between the conductive wires to allow the casting material radially outside the circumferential wall to be mechanically connected with the casting material in the cavity.

The application discloses a kind of offshore wind power generation and hydrogen electricity combined transport system based on superconducting technology, including offshore superconducting wind power generation system, the electric energy output by offshore superconducting wind power generation system is gathered to offshore platform by submarine power collection cable and submarine power collection cable of liquid hydrogen cooling pipeline system, and is converted into stable direct current by first voltage conversion system;Offshore liquid hydrogen preparation system utilizes a part of stable direct current to prepare liquid hydrogen, a part of liquid hydrogen is introduced into submarine power collection cable and liquid hydrogen cooling pipeline of liquid hydrogen cooling pipeline system after being pressurized and cooled, to provide cooling for superconducting fan in turn, and the remaining liquid hydrogen is transported to superconducting outlet system through mixed energy pipeline using active gasification temperature control technology with the remaining stable direct current, and the electric power of superconducting outlet system is transmitted to national power grid through second voltage conversion system, and the liquid hydrogen of superconducting outlet system is stored, transported and sold;The application reduces the investment cost of offshore superconducting fan cooling system.

The present application relates to photovoltaic power generation technical field, specifically relates to a kind of agricultural light complementary system, including multiple photovoltaic panels and grid-connected power generation system with battery, multiple photovoltaic panels absorb solar energy to generate electric energy, and grid-connected power generation system exports electric energy in the form of direct current to battery or by inverter into national power grid, photovoltaic panel is equipped with battery management system between battery, the area that the photovoltaic panel is installed is marked as installation area, still includes efficiency evaluation module, output control module, covering analysis module.Output control module includes output prediction unit and output control unit, output prediction unit is according to the power generation efficiency of photovoltaic panel and the weather condition in future certain time range to predict the power generation efficiency of photovoltaic panel, and output control unit regulates the output target of photovoltaic panel power generation according to predicted power generation, controls whether electric quantity is output to battery or is incorporated into power grid, improves resource utilization efficiency.

The invention discloses a power grid warehouse sheltered material dynamic scanning and precise re-checking positioning system based on a quadruped robot, and relates to the technical field of crossing of storage intelligent management, robot control, laser radar point cloud processing and RFID identification. In order to solve the problems that RFID signal penetration is blocked, the inventory scanning missing rate is high, and the rechecking efficiency of different materials is low due to material stacking and equipment shielding of a national power grid warehouse, the system reuses an existing quadruped robot, a laser radar and RFID equipment, and a shielding state recognition module, a dynamic scanning strategy adjustment module and an accurate rechecking positioning module are additionally arranged, so that the system is more accurate and reliable. And active identification of a shielding scene, dynamic optimization of a scanning strategy, three-dimensional accurate positioning of different materials and shortest path guidance are realized. According to the method, the RFID tag identification rate of the shielding area is improved to 95% or above, the scanning missing rate is reduced to 5% or below, the time consumed for single-piece difference material re-checking is shortened to be within 5 minutes, hardware cost does not need to be newly increased, the method is suitable for multiple types of shielding scenes of a power grid warehouse, and the inventory integrity and the operation and maintenance efficiency are remarkably improved.

The invention belongs to the crossing field of electric power informatization and artificial intelligence, and provides a multi-model collaborative review system aiming at the problems of low manual review efficiency, poor standard conformity and insufficient single model review of terminal product automatic detection scripts of the state grid and the southern grid. The system comprises five modules, namely an input adaptation preprocessing module (analyzing a script language, a terminal category and a standard version), a multi-model parallel scheduling module (calling models such as a Tonyuan question and the like for concurrent review), a result aggregation analysis module (generating standardized problem entries and marking confidence coefficients), an intelligent abstract report generation module and an output integration support module. And a'parallel review-cross validation-intelligent aggregation 'closed loop is constructed. The method can improve the review reliability, reduce the false and missing report rate, guarantee the power grid detection safety, and is suitable for the scenes of terminal network access detection script admission review, manufacturer quality access control and the like.

The utility model provides an independent photovoltaic grid-connected power generation system established by simulating a state grid through a sine wave inverter, which comprises a photovoltaic panel, an MPPT (maximum power point tracking) inverter, an energy storage battery charger, a distribution box, a low-voltage direct-current inverter, an energy storage battery and a current transformer, the output end of the photovoltaic panel is connected with the input end of the MPPT inverter, and the output end of the photovoltaic panel is connected with the input end of the energy storage battery. The output end of the energy storage battery is connected with the input end of the low-voltage direct-current inverter, and the output end of the low-voltage direct-current inverter is connected with the input end of the distribution box; the photovoltaic panel can convert solar energy into electric energy, the electric energy is inverted into 220V alternating current through the MPPT inverter to be used by a user, a small part of electricity flows into the energy storage battery through the energy storage battery charger, the energy storage battery supplies power to the user through the low-voltage direct-current inverter at night, and through the cooperation of the current transformer and the MPPT inverter, the energy storage battery supplies power to the user through the low-voltage direct-current inverter. And the reverse current is prevented from generating voltage impact on the low-voltage direct-current inverter.

The present application belongs to the field of electrical power supply, and is particularly suitable for power supply or electrolytic capacitor manufacturers to test the actual maximum allowed AC component of pulsating DC. It can simulate poor plug contact, and can freely control the on / off power grid frequency rectification charging circuit several to tens of times per second. The duration of each on / off rectification charging circuit is adjustable, and the actual maximum allowed AC component of pulsating DC of high-voltage electrolytic capacitor after grid frequency rectification can be tested. The present application can also directly add poor plug contact or grid undervoltage overload protection function, and can also add automatic input voltage increase function when the grid is in a super-wide undervoltage fluctuation state, which is equivalent to adding high-voltage electrolytic capacitor capacity in disguise, reducing the pulsating AC component of high-voltage electrolytic capacitor, and at the same time, can achieve the protection of national power grid and user equipment, especially the service life of high-voltage electrolytic capacitor.

The invention belongs to the technical field of new energy, and particularly discloses a differential pressure power generation device for a natural gas purification plant, which comprises an expansion machine, a gear box, a power generator and a power distribution station, the expansion machine, the gear box, the power generator and the power distribution station are connected in sequence, and a dry gas sealing mechanism is mounted on a rotating shaft of the expansion machine. A sealing gas inlet is formed in the dry gas sealing mechanism; an inlet pipeline of the expansion machine is connected with a product gas conveying upstream pipeline, and an outlet pipeline of the expansion machine is connected with a product gas conveying downstream pipeline; and an inlet interlocking valve is mounted on an inlet pipeline of the expansion machine. Power generation can be implemented through pressure reduction adjustment in the natural gas conveying process, namely pressure drop existing between a production pipe network of a purification plant and a downstream pipe network, so that the electricity demand for the national power grid is reduced, and energy recovery is achieved.

The application discloses a state grid marketing business auditing method and system based on multi-source monitoring, comprising S1: collecting multi-source monitoring data of automation and video monitoring, and performing key entity correlation preprocessing to obtain business behavior data; S2: obtaining an electricity mutation index from the business behavior data, obtaining an event sequence vector based on the business behavior data, constructing an event time sequence convolution network model based on the event sequence vector, and outputting running event correlation degree of the business behavior data based on the event time sequence convolution network model; S3: based on the electricity mutation index and the running event correlation degree, outputting an initial risk value through construction of a collaborative risk fusion network based on sparse excitation, and performing risk conduction and traceability analysis based on the initial risk value to obtain a business dynamic risk portrait of an auditing object; and S4: based on the business dynamic risk portrait of the auditing object, realizing marketing business auditing through intelligent auditing task distribution and accurate auditing strategy recommendation.

The invention relates to the technical field of distributed power generation, and discloses a distributed energy access and electric energy storage control method and device, equipment and a medium, and the method comprises the steps: S1, carrying out the self-inspection and identity binding before grid connection; s2, performing security registration and network topology discovery; s3, constructing a real-time panoramic perception data pool; s4, the cloud end issues a global optimization target; s5, carrying out local collaborative optimization calculation; s6, security instruction encryption and reliable issuing; s7, equipment precise execution and local active support are carried out; s8, whole-process data monitoring and execution feedback are carried out; and S9, effect evaluation and model adaptive iteration are carried out. The invention discloses a distributed energy access and electric energy storage control method, device, equipment and medium, which ensure that access equipment must meet the national grid connection standard and the source is credible through forced self-check before grid connection and two-way identity authentication based on a digital certificate, thereby completely eradicating access of illegal or inferior equipment from the source, and improving the safety of grid connection. The problems of grid-connected standard unification and access safety are solved.

The application discloses a kind of national grid province multistage power system collaborative scheduling operation method and device, comprising: according to the target demand of national regulation, the target demand of network regulation, the target demand of province regulation, the load balance constraint of each level, the upper and lower limit constraint of multiple direct regulation unit output, tie-line transaction constraint, the unit output constraint of province regulation and positive and negative reserve constraint, constructs national grid province multistage power system collaborative scheduling model;Provincial equivalent aggregation node and network equivalent aggregation node are constructed to simplify the structure of national grid province multistage power system collaborative scheduling model;Based on target inter-level method, the simplified national grid province multistage power system collaborative scheduling model is solved, and the multistage power system collaborative scheduling operation result is obtained.The application belongs to the field of power system collaboration.The application improves the power system optimization scheduling solving efficiency under the whole network collaboration.

The invention discloses a solution for merging an open cold storage system into a closed central air-conditioning system, which relates to the technical field of energy conservation of central air-conditioning systems, and comprises the following steps of: setting a timetable automatic operation mode on an SCADA (Supervisory Control and Data Acquisition) monitoring unit according to valley, flat and peak electricity price time periods published by the State Grid Corporation of China; the SCADA monitoring unit automatically executes a cold storage mode instruction, starts a refrigeration host and controls a valve to enable ice water at the temperature of 5 DEG C to preferentially flow through a cold storage tank for heat exchange until the water outlet temperature of the cold storage tank reaches a target value; when the unit time enters a level power period, the SCADA monitoring unit is switched to a cold machine mode according to a time table instruction, a cold storage tank pipeline valve is closed, and independent cold supply of the refrigeration main machine is recovered; and when the unit time enters the peak power period, the SCADA monitoring unit executes the peak power mode instruction. The self-operated pressure balance valve is used for dynamically adjusting the grid-connected voltage difference based on the PID algorithm to achieve pressure pre-balance, then the electric adjusting valve is controlled to be slowly opened, and the refrigeration main machine is started to achieve collaborative cooling.