232 results about "Power sector" patented technology

The invention provides a rapid extraction and reconstruction method for a data power line of an airborne LIDAR. The method comprises the following steps of: acquiring a large amount of laser point cloud data by using an airborne laser radar measurement system, and filtering the laser point cloud data by properly setting an elevation threshold value to reject point cloud data not formed by a power line; after the filtration of the point cloud data is finished, rejecting a pylon according to the variation characteristics of point cloud density on the two sides of the pylon; counting the point number of each layer of power line in the point cloud data of the power line by adopting a histogram counting analysis method, layering the power line, and fitting the power line in the same layer, thereby separating point cloud data on a single power line; and fitting the power lines by utilizing a catenary equation, estimating a catenary equation parameter, and finally realizing the vectorization of the power line. By the method, automatic power line extraction and pylon extraction between a plurality of spans can be rapidly realized, and extraction efficiency is high; and the method can be used for the transmission line safety inspection of a power sector, and transmission line inspection efficiency is greatly improved.

The invention provides a power demand responding method, comprising the following steps of: connecting a power department interface with a power supply system; obtaining power supply information from the power supply system through the power department interface; analyzing a power demand on an entire power grid according to the power supply information; analyzing the power supply information and a power demand of a community according to the analysis of the power demand; generating a scheduling scheme; and executing the scheduling scheme through a demand responding device. A system corresponding to the power demand responding method comprises a power department interface device, a power demand analyzing device, a community analyzing device, a demand scheduling device and the demand responding device. With the adoption of the responding method and the responding system, the load of the power grid can be balanced; the security property of the power grid is improved; the comprehensive electric charge of a user can be reduced; and the influence of power rationing on resident lives can be avoided.

The invention discloses an intelligent dynamic environment monitoring system for real-time monitoring and control on a power distribution station. The system comprises an on-site acquisition control terminal and a master station monitoring center which are communicated with each other via a network, wherein the master station monitoring center comprises a monitoring server, a database and a display unit; and the on-site acquisition control terminal is used for data acquisition in the on-site environment, and comprises a monitoring host and a data acquisition unit. With the intelligent dynamic environment monitoring system, an electricity sector can get the running state and environment state of power supply devices in time, and real-time monitoring and control are implemented via the monitoring means, consequently, direct and convenient technical support is provided for electricity consumption management. The invention further discloses an intelligent dynamic environment monitoring method.

The invention discloses a user habit based intelligent household electricity utilization method and a system thereof. The user habit based intelligent household electricity utilization method comprises collecting user electric appliance starting information and obtaining various electric appliance starting habits of a user, collecting various electric appliance operation information and electric power department time-of-use electricity use information to be used in internal arithmetic, requiring the user to initiatively input electric appliances the user prepares to use, enabling a user to input electricity use levels, calculating electric charge parameters, calculating comfort levels, constructing an object function, optimizing an electricity user scheme through a particle swarm optimization, controlling various electric appliances according to internal arithmetic and finally achieving family intelligent electric utilization. The invention also discloses an intelligent electric utilization system with an ARM9 processor serving as a core, wherein an electric energy measuring module, an operation display module, an external communication module and an appliance control module which are connected with the intelligent electric utilization system form into the intelligent electric use system. The user habit based intelligent household electricity utilization method is scientific and efficient.

The present invention discloses a low-voltage area KFCM-SVR reasonable line loss prediction method. The method comprises the following steps: 1) presorting data samples twice after data screening; 2) clustering six types of data by using fuzzy kernel clustering to obtain a plurality of small types; 3 ) establishing a regression fitting model by virtue of a least squares support vector machine (LS-SVR); 4 ) calculating a residual error confidence interval limit value; 5) classifying to-be-predicted data into each small types according to a Euclidean distance principle; 6) after classification, inputting the to-be-predicted data into each respective corresponding LS-SVR model, and calculating to obtain a prediction residual error; and 7) comparing the prediction residual error with the residual error confidence interval limit value to provide a conclusion. In the low-voltage area KFCM-SVR reasonable line loss prediction method disclosed by the present invention, an algorithm has certain reasonableness under a big data condition, and a computed result of the algorithm can provide relatively reliable guidance for area line loss management of an electric power department, and provide a new idea for reasonable utilization and mining of big data in the current smart power network.

The invention relates to the technical field of simulation calculation of a power system, in particular to a software interface for automatically generating a simulation calculation model of a power system computer aided design (PSCAD) power system. The software interface comprises a power system-geographic information system conversion module used for resolving a geographic information database,a power system-energy management system conversion module used for resolving an energy management database, a graphical simulation file used for writing a PSCAD simulation calculation model, and a simulation model automatic generation module used for automatically generating a simulation calculation model. In the software interface, the conventional various data resources of electric utilities isfully utilized, so that the automatic compilation of the PSCAD simulation calculation model is realized, the compilation process of the simulation calculation model is greatly simplified, the compilation difficulty of the model is reduced, the compilation efficiency of the model is greatly improved, and the accuracy of the model is improved, wherein the generated simulation calculation model not only can be used for the conventional power flow calculation and steady-state analysis but also can be used for various fields such as power quality evaluation, fault analysis and the like.

The invention relates to a geocoding-free rapid image splicing method of a low-altitude unmanned plane. A key frame image is extracted from a video to carry out geocoding-free rapid image splicing to generate a panoramic image. The method comprises the following steps: extracting a key frame image from a video stream to obtain all to-be-spliced images; carrying out feature point extraction including establishing a multi-dimensional space unit, constructing a pyramid image, determining a key point position, and removing an unstable point on all to-be-spliced images and carrying out screening on the key point by using a SUSAN algorithm to obtain a final feature point; carrying out feature matching according to respective feature points of a corresponding reference image and a to-be-matched image; and carrying out smoothening on the to-be-spliced images by using a gain compensation method, carrying out weighted average fusion on spliced overlapped areas to eliminate seams and sawteeth, and carrying out splicing to generate a panoramic image. According to the technical scheme, the method can be applied to fields of emergency surveying and mapping, disaster prevention and mitigation, land monitoring, emergency monitoring, pipeline layout and inspection of the oil sector, and circuit layout and power line inspection of the power sector and the like.

The invention discloses a real-time detection method for an electric power sensitive mail based on multimode matching. The method mainly comprises the following steps of (1) analyzing an electronic mail sent by staff in real time, and extracting mail information; (2) initializing a multimode matching engine by using set electric power sensitive keywords; (3) matching sensitive keywords for a mail subject, a mail body, an attachment subject and an attachment body by utilizing the multimode matching engine; (4) judging whether the mail is the electric power sensitive mail according to a matching result, if so, intercepting the electric power sensitive mail in real time and sending alarm information, and otherwise, normally sending the mail. According to the method, the electronic mail sent by the staff can be analyzed on an electric power office PC (Personal Computer) terminal, the sensitive mail which probably contains electric power confidential information is detected, and a mail interception module is informed of real-time interception, so that a confidential document of an electric power department is effectively prevented from being leaked, and the data safety of an internal electric power system and a terminal is protected from the source.

The invention relates to an environment factor monitoring and finite element-based underground power cable current-carrying capacity online prediction system and an environment factor monitoring and finite element-based underground power cable current-carrying capacity online prediction method. The system consists of a temperature sensor used for measuring the air temperature, a wind speed sensor, a humidity sensor, a singlechip system and a scheduling host of a power department. The method comprises the step of predicting the current-carrying capacity of an underground power cable by combining temperature, wind speed, humidity and other data measured in real time with the calculation of a finite element temperature field. The system and the method have the advantages that: the system and the method can accurately predict the current-carrying capacity of the underground power cable on line, so that the power department can develop the capacity of conveying electric energy to the greatest degree; meanwhile, the system and the method can avoid the resource waste phenomenon of wasting the talent on a petty job on the premise of guaranteeing safe and reliable operation.

A harmonic energy metering error analytic device comprises a harmonic data collection part used for inputting the harmonic data collected by power network into an electric energy data analytic part, an electric energy metering error data analytic part comprising a model storage module and an error analysis module and an error analytic result output part used for outputting or storing the error data analytic result acquired from the electric energy metering error data analytic part; wherein the model storage module is used for storing metering error models and model functions corresponding to the models of electric energy meters; the error analysis module is used for deriving the theoretical error data to be analyzed of the input harmonic data and deriving the error of each harmonic measurement and the total error. The harmonic energy metering error analytic device can provide quantitative data basis for power supply department to retrieve electric energy metering error loss and control harmonic pollution.

The invention relates to a single-phase multifunctional electronic time-sharing electricity meter using a Microchip dsPIC30F6014A singlechip as core structure. The electricity meter comprises a power circuit, a sampling circuit, a Chinese LCD display, an electric energy pulse interface and a communication interface. The sampling alternating-voltage, current enter into an AD module in MCU by a mutual inductor and an operation amplifier TLC2264 and the voltage signal enters into the input capturing module of MCU to obtain the sampling frequency at the same time and the accurate electric quantity value is obtained by a 64-point fast Fourier transform, thus the special DSP module of the MCU makes the electricity meter have higher measurement accuracy and operation speed. At the same time, a real-time clock effectively generates the record of the time-interval electric energy and every tariff in each month according to the preset time interval and payment day in each month. The multifunctional electricity meter can record and store the maximum demand of the electric energy, power-off and power-on, energy emptying, system parameter setting or the like, in favor of statistics and power-supplying scheme adjustment of electric energy department and the reasonable arrangement of energy source can be realized.

The invention discloses an intelligent electric power parameter tester, which comprises a zero-crossing comparison circuit, a phase locking synchronous circuit, a signal conditioning circuit, an A/D conversion module, a control module, a power supply, an input module, a data display module and a USB interface module. Multiple electric power parameters are measured by adopting a DSP digital processing chip, and the intelligent electric power parameter tester has the unique advantages in aspects of improvement on measurement accuracy, real-time digital signal processing and intellectualization. In the intelligent electric power parameter tester, voltage and current at the same phase are respectively used as a real part and an imaginary part of a complex sequence to perform Fourier transform, and the intelligent electric power parameter tester has the maximal advantage that various electric power parameters (voltage effective values, current effective values, frequency, harmonic waves, power factors, active power, reactive power and the like) in a power grid can be solved simultaneously by only one-time the Fourier transform of the complex sequence, so the calculated amount is reduced, and the real-time and accuracy of measurement are improved. The intelligent electric power parameter tester can be widely applied in occasions such as electric power departments, industrial and mining enterprises and the like where the multiple parameters of an electric power system are needed to be measured automatically.

An on-line monitoring system of power cable core temperature comprises cable, temperature measurement element set on surface of power cable, current recorder and temperature measure connected separately to cable and temperature measurement element. It is featured as converting collected current and temperature analog signals to be digital signals by current recorder and temperature measurer then sending digital signals to computer with calculation program.

The invention discloses a novel converting station stationing method. The method includes the steps of firstly, using minimum investment and operation cost as a target function, and using an outer point method to build a fitness function of a converting station; secondly, predicting total load P and the requirements for converting station capacity-load ratio r of a planning area according to level year load of the planning area, and determining level year converting station total capacity S required by the planning area; thirdly, determining number n of to-be-built converting stations according to forming requirements for saturation year converting station total capacity of local power departments and after level year converting station total capacity is determined; fourthly, building solution space for transverse coordinates, vertical coordinates and capacity of an address of each to-be-built converting station; fifthly, using DE (differential evolution) algorithm to solve transverse coordinates, vertical coordinates and capacity of the address of each to-be-built converting station, and outputting results; and sixthly, for boundary stations in areas in which no stations can be built, adding a variable step size motion vector to the coordinate direction of the station addresses to change location of the stations so as to allow the boundary stations to be located in areas in which stations can be built.

The invention discloses a method and a device for GRU-based medium and long-term prediction of irradiance of a photovoltaic power station, relates to methods and devices for medium and long-term prediction of the irradiance of the photovoltaic power station and belongs to the field of irradiance prediction. The method comprises the steps that solar irradiance data at the position of the photovoltaic power station is collected; the solar irradiance at the position of the photovoltaic power station is predicted based on a GRU (threshold recursion unit) neural network model; an electric power department performs medium and long-term planning and scheduling according to an obtained irradiance prediction result, reasonable utilization of resources is realized, and equipment loss and other problems caused by unreasonable increase of the installed capacity are reduced. The invention furthermore discloses the device for implementing the method. The device comprises a collection module, a prediction module and a decision making module. Based on the GRU (threshold recursion unit) neural network model, a memory function is achieved, and medium and long-term prediction of the irradiance of the photovoltaic power station can be realized. Besides, the method and the device also have the advantages of high accuracy, high efficiency and simple implementation.

The invention discloses a grid-connected inverter. The grid-connected inverter comprises a DC-DC circuit and a DC-AC inverter bridge which are connected mutually, and further comprises a split-phase controller. The split-phase controller controls the DC-AC inverter bridge to produce an offset current, and the offset current is used for compensating an unbalanced current produced by a load AC port of the DC-AC inverter bridge to enable a current output by the DC-AC inverter bridge to be the same with a current at the load position and to enable different ports of the DC-AC inverter bridge to output different currents, wherein the unbalanced current is produced due to the fact that the load AC port of the DC-AC inverter bridge is connected with different loads. The grid-connected inverter can solve the problem that three-phase power supply is unbalanced, and can automatically compensate reactive power needed by a three-phase load. The more functional inverters are applied, the more obvious the effect becomes. The problems of unbalanced electric power supply and reactive compensation can be solved while the new energy is utilized, the frequency of using an expensive active power filter and a reactive compensation device is reduced, the power supply cost is saved for electric power departments, and the grid electricity supply quality is improved.

The invention relates to the technical field of power sector overhead power transmission line equipment maintenance, in particular to a tool for electrified replacement of a 500kV strain insulator string. The power transmission line 500kV strain insulator string is provided with many pieces and is high in weight, the difficulty in electrified replacement of the whole strain insulator string is high, the power failure influence range is wide, and the requirements of device state overhaul are not met. The tool comprises a front clamp, a rear clamp, pulleys, insulating pull rods, a wire tightening screw rod, a supporting bottle frame and a pre-tightening device. The front clamp and the rear clamp are a pair of oppositely arranged clamping arms and are connected through the two insulating pull rods and the wire tightening screw rod, a front clamping pulley and a rear clamping pulley are respectively fixed on the front clamp and the rear clamp, the supporting bottle frame is lifted under the insulating pull rods through the front clamping pulley and the rear clamping pulley, and the lower portion of the supporting bottle frame is hinged to the pre-tightening device. The tool is simple and reasonable in structure, high in mechanical strength, good in insulating performance, light in weight, safe and reliable to use, good in universality and convenient to operate, improves working efficiency and guarantees that power is supplied reliably.

The invention discloses a cooperative control method for unmanned aerial vehicle power line routing inspection. The cooperative control method includes the control steps in the power line outer side turning stage and the controlling steps in the power line inner side turning stage in the unmanned aerial vehicle power line routing inspection. In the power line inner side turning stage, the control steps include the control steps executed when the turning angle is larger than 90 degrees and the control steps executed when the turning angle is smaller than 90 degrees. By means of the cooperative control method for unmanned aerial vehicle power line routing inspection, cooperative control over automatic data acquisition task execution is implemented in the two important stages, namely, the power line outer side turning stage and the power line inner side turning stage, in the unmanned aerial vehicle power line routing inspection. In addition, by means of the cooperative control method for unmanned aerial vehicle power line routing inspection, cooperative control over unmanned aerial vehicles can be further conducted in the stage of flight along the power line, the stage of task starting, the stage of task suspending and the stage of task completing. The cooperative control method can coordinate multi-sensor task execution and state monitoring of unmanned aerial vehicles flying along the channel of the power line, can be used for data acquisition of transmission line safety routing inspection of the electric power department and can greatly improve efficiency of transmission line routing inspection.

The invention relates to a power sector emergency drilling method, an emergency drilling platform and an emergency drilling system. According to the method, retrieval is performed in a preset underlying database according to a keyword of a to-be-drilled accident, and accident information and accident space information corresponding to the to-be-drilled accident are obtained; location information of an augmented reality display device is acquired; when the location information is matched with the accident space information, the accident information is sent to the augmented reality display device so that the augmented reality display device can generate prompt information corresponding to the to-be-drilled accident according to the accident information; a virtual drilling device and a virtual operation instruction input into the augmented reality display device by emergency drilling personnel are acquired, and corresponding virtual action information is generated; and the virtual action information is sent to the augmented reality display device, and the augmented reality display device updates the prompt information according to the virtual action information. Through the method, the sense of reality of drilling is enhanced, and the problems that traditional drilling methods are difficult to implement and high in cost and have risks are solved.

The invention discloses a power-grid-GIS-based meteorological data invoking and pretreatment method and system. The method comprises the following steps: establishing a standard specification meteorological data interface and a data parsing specification and establishing a power grid meteorological database in a power grid GIS platform; carrying out processing on the meteorological data that are collected by the power grid GIS platform and have different formats, converting the data into ones in formats that can be stored and displayed directly by the power grid, and storing the data into the power grid meteorological database; carrying out meteorological data classification pretreatment, specifically carrying out meteorological data classification pretreatment on the data stored into the power grid meteorological database; and carrying out data caching and invoking. According to the invention, the application method of meteorological data in the power grid is optimized and the power specialization application is realized; the basic guarantee is provided for successfully display and early warning of meteorological information of the power grid GIS platform; and the foundation is laid for rapid data interaction between the power sector and the meteorological department.