43 results about "National Grid" patented technology

The invention discloses a regional power grid dispatching method and system based on multi-source data, and relates to the technical field of power grid dispatching, and the method comprises the steps: obtaining regional power grid distribution information from a state grid GIS platform, deploying a dispatching system at a cloud end based on an OpenFMB framework, and collecting basic parameters, operation history, equipment history state, history environment and history power consumption information. And then, constructing a power grid load constraint model, carrying out power limitation to obtain node constraint information, and predicting future power utilization information by using an LSTM (Long Short Term Memory) model. And finally, determining a scheduling strategy by combining the real-time information, the node constraint information and the future electricity consumption information, such as starting SVG reactive compensation or transferring load according to the power condition. The system comprises an acquisition module, a master control module, a scheduling module and a display module which are clear in division of labor and collaboratively realize power grid scheduling. According to the method and the system, the problems of data transmission delay, high single-point fault risk, low dispatching efficiency and the like of centralized data storage and processing in power dispatching are effectively solved.

The invention relates to a method for establishing a panoramic view of a power customer, which comprises the following steps of: carding a panoramic view standard of the power customer, collecting and integrating power customer data of multiple data sources inside and outside a state grid system, carrying out data analysis mining by virtue of a big data analysis technology, perfecting a multi-layer, multi-view and three-dimensional customer panoramic view in a label form, and establishing a panoramic view of the power customer. And an accurate and comprehensive customer portrait is described.

The present invention discloses a regional power grid dispatching method and system based on multi-source data, which relates to the technical field of power grid dispatching. It includes: first obtaining the regional power grid distribution information from the State Grid GIS platform, deploying a dispatching system in the cloud based on the OpenFMB framework, and collecting basic parameters, operation history, historical equipment status, historical environment, and historical power consumption information. Then, a power grid load constraint model is constructed, power limitation is performed to obtain node constraint information, and an LSTM model is used to predict future power consumption information. Finally, the dispatching strategy is determined by combining real-time information, node constraint information, and future power consumption information, such as starting SVG reactive power compensation or transferring load according to the power situation. The system includes a collection module, a main control module, a dispatching module, and a display module. Each module has a clear division of labor and cooperates to achieve power grid dispatching. This method and system effectively solve the problems of data transmission delay, high single-point failure risk, and low dispatching efficiency in centralized data storage and processing in power dispatching.

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 present invention belongs to the technical field of electric power tools and discloses a special discharge device for power capacitors, which has a short-circuit component, an insulating grip component, a grounding component, and an adjustable universal joint (7). It is characterized in that the short-circuit component is composed of a short-circuit telescopic rod (1), a finger contact part, and a finger contact connection part (3), and the insulating grip component is composed of a telescopic insulating rod (8) and a handheld insulating handle (9); the grounding component is composed of a discharge resistance component (5), a grounding wire, and a grounding terminal clamp. This application solves the requirements stipulated in Article 7.4.2 of the State Grid Safety Regulations: after verifying that the equipment is indeed without voltage, the equipment under repair should be immediately grounded and three-phase short-circuited. And the requirement that the full discharge time of each 10 kV capacitor bank is controlled within 5 minutes. The present invention has the following beneficial effects: the charge in the capacitor is released more thoroughly, the personal safety of power workers is ensured, the operation of related equipment is safer, and the man-hours for capacitor maintenance operations are shortened.

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 relates to the technical field of green energy power generation, and discloses a green energy power generation system which comprises a magnetomotive hydraulic energy increasing device used for generating continuous power according to the principle that like poles repel and unlike poles attract in a magnetic field; the hydraulic energy storage starting device is used for providing necessary initial energy when the system is started; the centralized hydraulic transmission system is used for efficiently transmitting power to the power generation module; the super-power generating module operates in parallel through a plurality of generators and provides high-efficiency electric energy output; and the flexible transformer and the grid-connected equipment are used for adjusting the voltage and the frequency of the power generation module, so that the generated electric energy is stably connected into the state grid. Green power generation without fuel consumption and emission is achieved through the magnetic power unit, the super-high-power hydraulic system and intelligent control are combined, the power generation efficiency is improved, the construction cost is reduced, the '10 + 1' standby machine is adopted to ensure uninterrupted operation all the year round, and the problems that traditional power generation depends on fossil fuel, the environment is polluted and shutdown is caused are solved.

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 relates to parameterization for a code compatible low voltage AC microgrid controller. A method for operating a controller for a microgrid includes obtaining a set of parameter data characterizing one or more regulation curves of one or more state grid codes. The one or more adjustment curves are related to a set of function variables executed by the controller for a point of common coupling (PCC) function. The method also includes configuring the message to a plurality of distributed energy sources (DERs), the plurality of distributed energy sources (DERs) being interconnected to the PCC. The message is configured to read input data from a register of each DER. The method further includes executing a PCC function to control the microgrid according to at least one of the one or more regulation curves based on a subset of the input data from each DER associated with the set of function variables.

The invention provides a park energy scheduling method and system based on supply and demand balance, and relates to the technical field of data processing. The method comprises the following steps: constructing a park energy network, wherein the park energy network comprises a state grid, photovoltaic power generation equipment, candidate equipment and pure electric equipment; acquiring an electrical load predicted quantity; obtaining photovoltaic power generation predictive quantity; determining the pre-purchased electric quantity purchased from the State Grid Corporation of China according to the electrical load predicted quantity and the photovoltaic power generation predicted quantity by taking supply-demand balance as a target; acquiring device data of each candidate device in the current park energy network environment; determining a priority parameter of each candidate device according to the device data of each candidate device; and the pre-purchased electric quantity and the photovoltaic power generation amount are preferentially used for power supply, and the candidate equipment is scheduled to charge and discharge in combination with the priority parameters of the candidate equipment by taking the minimum power consumption cost and the most balanced supply and demand as targets so as to supply power to the park. According to the invention, the balance and stability of power supply can be ensured.

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.

The invention relates to an air source heat pump unit with a peak-valley electricity control strategy and a control method thereof. 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.

The invention discloses an operation management method for a combined self-contained bidirectional charging pile. The operation management method comprises the following steps: step 1, site selection and addressing operation; 2, charging pile / point construction operation is carried out; step 3, operation work operation; and 4, dynamically adjusting the operation flow operation. The operation management method has the beneficial effects that the operation management method of the combined self-provided bidirectional charging pile in the technical scheme is provided with the independent energy storage module and supplies energy in a power conversion mode, can realize random pile / point construction operation according to needs, can be connected with infrastructure (energy supply) for operation, can be suitable for independent operation, and can be used in any suitable condition. The system can realize linkage deployment operation with the state grid, and by adopting the operation management method, the construction and maintenance cost is reduced, and the phenomenon of insufficient charging energy complementation service is solved.

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.

A method for operating a controller for a microgrid includes obtaining (1310) a set of parameter data characterizing one or more regulation curves of one or more national grid codes. The one or more regulation curves relate to a set of functional variables for point of common coupling (PCC) functions performed by the controller. The method further includes configuring (1320) messages to a plurality of distributed energy resources (DERs) interconnected to the PCC. The messages are configured for reading input data from registers of each DER. The method further includes performing (1330) the PCC functions to control the microgrid according to at least one of the one or more regulations curves, based on a subset of the input data from each DER that relates to the set of functional variables.

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 utility model discloses a direct current bus type optical storage and charging system, relates to the technical field of energy storage and charging, and solves the problems that when an existing device is used, a cleaning pipe structure is fixed and cannot move, the cleaning effect is limited only through water flow, a device for collecting cleaned sundries is not arranged, and the sundries can pollute the environment. According to the scheme, the system comprises a solar panel, a converter, a state grid, an AC / DC steering module, a direct current bus, an energy storage system and a charging station, the solar panel is connected with the converter, the state grid is connected with the AC / DC steering module, a cleaning mechanism is arranged, a transverse pipe and a nozzle can be driven to uniformly move, water is sprayed to the surface of the solar panel for cleaning, and the cleaning efficiency is improved. And through the arranged recycling mechanism, waste water can be recycled, filtered sundries can be collected in a centralized mode through a collecting frame, environment pollution is avoided, and the sundries can be taken out through an opening by opening a sealing plate.

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 invention discloses a time-frequency magnitude sending device suitable for low-voltage power line carrier communication, which avoids an HPLC (High Performance Liquid Chromatography) communication channel and selects a low frequency band for communication, the frequency band range is 200kHz-700kHz, the noise and channel attenuation of a power line at the frequency band are relatively small, and the time-frequency magnitude sending device has the characteristic of long signal transmission distance. The time-frequency magnitude signal sent by the device can cover time-consuming equipment of the whole transformer area, and a set of efficient and universal solution is provided for establishing a time-frequency magnitude transmission system for the state grid.