599 results about "Thunderbolt" patented technology

The invention relates to a lightning striking fault identifying method of a direct current power transmitting line traveling wave protection. According to the characteristic difference of voltage traveling wave shape between the formed faults and unformed faults, two-pole voltage traveling wave weight and origin direct current weight are used to identify changing trend of the wave shape; ratio of a initial traveling wave mode maximum value and the second mode maximum value is used for representing saltation that the wave shape is cut; combining the two characteristics to achieve the identification of the voltage traveling wave while not causing the faults by lightning pole tower, lightning striking lightning line, lightning striking line shift central distance and the voltage traveling wave of non-lightning short circuit fault by the lightning pole tower, lightning striking line shift central distance. The interference and identification of the two lightning weaves are combined to improve the identifying reliability. A large number of emulations represent that this method is reliable and effective. The physical conception of this invention is intuitionistic and clear and has a rapid action function. The invention does not be influenced by the fault type and transition resistance and it is easy to achieve and suitable for apllying to direct current system protecting device.

The invention relates to a digital lightning detection method and a device thereof. The method comprises the following steps: receiving an electromagnetic signal generated when cloud-to-ground flash lightning discharging to generate an electric detection signal; digitalizing the conditioned electric detection signal; filtering the digital signal; establishing a uniform time scale; establishing a lightning signal identification criterion and a digitized cloud-to-ground flash lightning signal identification model by a time determination method, a bipolar test method and a homopolar test method by considering transmission features of a lightning electromagnetic radiation waveform; establishing a time window preprocessing area, and acquiring a development trend of the input digital signal and the corresponding typical parameters; and computing and determining the parameters of the input digital signal in combination with data in the time window by the digitized cloud-to-ground flash lightning signal identification model . The device consists of an antenna, a signal conditioner, an analog to digital converter, a module of cloud-to-ground flash lightning signal identification model, a system control manager, an assistant control manager, a communication interface, an external memory and a clock.

The invention relates to a traveling wave analysis and recognition method for distinguishing lightning shielding failure from lightning counterattack of direct current transmission line. The lightning shielding failure of line is that lightning avoids the lightning shield line and directly strokes on the transmission line, while lightning counterattack of line is that lightning directly strokes on the lightning shield line or the tower. Because the earth resistance of tower exists, the potential on tower top suddenly increases and causes insulation flashover. The electromagnetic transient component generation mechanism of the high voltage direct current transmission line and the propagation path of lightning electromagnetic transient of the line in the lightning shielding failure are different from those in the lightning counterattack, the size and polarity of the initial surge voltage and the second surge voltage of the voltage transient signal exist significant difference. The traveling wave analysis and recognition method of the invention analyzes zero mode voltage using wavelet and distinguishes the lightning shielding failure and lightning counterattack failure according to the size and polarity of the initial surge voltage and the second surge voltage of the zero mode voltage in the traveling wave analysis and high-speed acquisition system of the protection zone. A lot of simulation results show that the method is reliable and effect. The physical concept of the invention is visible and clear, the method is easy to achieve and wide to use in the direct current system protector, also provides accurate initial data for researching lightning characteristics, analyzing lightning accident, discussing lightning protection countermeasure of transmission line and designing insulation coordination in the power system.

The invention relates to a method for recognizing the shielding failure and the counterattack of a high-voltage DC transmission line. The shielding failure of the line means that the thunderbolt directly strikes on the transmission line by steering clear of a ground wire; the counterattack means that the thunderbolt directly strikes on the ground wire or a pole tower, the electric potential on the top of the tower increases instantaneously, which causes the insulation flashover due to the existence of a pole tower earth resistor. The different theories generated by the electromagnetic transient component of the shielding failure and the counterattack of the high-voltage DC transmission line and different paths of transmission of the thunderbolt electromagnetic transient component on the circuit cause that the energy distribution of different frequency bands of the generated voltage transient state signals are different greatly. In a travelling wave analysis and high-speed acquisition system at the protective installation position, the small wave analysis is adopted to extract the energy of the zero modulus voltage in different frequency bands. The shielding failure and the counterattack are differentiated according to the property of the energy distribution. A large amount of emulations show that the method is reliable and effective. The method has intuitive and clear physical concepts, is easy to implement, can be widely applied to a high-voltage DC system protective device, provides important data for the lightening protection design of the line and provides reference for the operation and maintenance of the line.

The invention relates to a wind turbine blade comprising lightning protection means. At least one section of the tip of said blade is made in solid metal and is included as part of said lightning means. The invention also relates to a wind turbine, a method of providing lightning receptor means to a wind turbine blade and use hereof.

The present invention discloses a method for calculating lightning induction voltage of an overhead power line tower. The method mainly comprises the following steps of: (1) calculating a space lightning electromagnetic field while the influence of the tower is taken into consideration, wherein a sub-grid technology based finite-difference time-domain method is adopted in which a coarse mesh is generated for air space and a fine mesh is generated for the tower; (2) applying a two-dimensional calculation result of the lightning electromagnetic field to field decomposition of a three-dimensional space structure formed by an overhead power line and a lightning current return stroke channel, wherein the lightning electromagnetic field is generated by stimulation of lightning return stroke current; and (3) calculating the lightning induction voltage of the overhead power line and extracting the lightning induction voltage of the tower, wherein the lightning induction voltage of the overhead power line is calculated by using an Agrawal model and an FDTD method, and the tower position is located by grid query and the lightning induction voltage of the tower is extracted. The method can be used for effectively and more accurately estimating the lightning induction voltage of the overhead power line and the lightening induction voltage of insulators and lightning arresters of the tower.

The invention provides a multidirectional state channel method and system for blockchain extension and a medium. The method comprises the following steps: a channel establishment step: establishing amultidirectional payment under-chain channel through cooperation of a channel supervisor S and a plurality of common users; and a channel payment step: in the established multi-direction payment under-chain channel, carrying out transaction is carried out among the common users, and a supervisor S sendings channel state updating information to the plurality of common users according to transactioninformation among the common users. The invention provides an efficient multi-directional state channel scheme supporting parallelism, and effectively solves an application scene that high-frequencybidirectional payment exists among a plurality of users. In the aspect of routing of cross-channel payment, compared with a lightning network and a thunder and lightning network constructed based on abidirectional payment channel, the lightning network and the thunder and lightning network have better performance.

The invention discloses a lightning guide strip and a manufacturing method thereof. The lightning guide strip is formed by adhering metal sheets on an insulating base band by adhesive at intervals and spraying aluminum powder on the adhesive between the two metal sheets. The lightning guide strip further comprises a grounding terminal. The manufacturing method comprises the following steps of: utilizing a laser cutting technology to machine the metal sheets and utilizing a template to position the metal sheets on the insulating base band coated by the adhesive; removing the template and coating an adhesive layer on the insulating base band after the adhesive on the insulating base band is primarily solidified; spraying one layer of the aluminum powder on the upper surface of the adhesive and finally polishing the whole guide strip to completely expose the upper surfaces of the metal sheets. The lightning guide strip provided by the invention has the advantages of simple structure, convenience for machining and utilization and low cost; the guide strip has a good lightning protection performance so that the influences on a radio frequency performance of a radar antenna are reduced;the aluminum powder between the metal sheets can be used for reducing a breakdown voltage so as to improve the lightning protection performance; and the service life is long so that the lightning guide strip can be widely applied to the lightning protection of equipment including airplane parts, blades of a wind driven generator, a radar antenna cover and the like.

An improved electric plug is disclosed having an extra extension cord sticking out of one side and a socket disposed at another end of the plug body so as to permit another plug to be coupled thereto consecutively. In particular, the present invention relates to electrical cable and/or communication cable that terminate in a modular interconnection housing that can be used as charging cable and data cable for a smart phone, and tablet, or something like. A build-in switch can shift its function between Power Sharing and Data Sharing mode. The modular interconnection housings from standard cable style design and keychain style design have a male communication connector protruding from one end, and a female communication connector received at another end or at another attached cable. The male communication connector is designed to provide electrical communication or power through various USB, thunderbolt, lightning cables, but not limited to these cables.

The invention discloses a flexible grounding device and method and a system of the flexible grounding device and method. The flexible grounding device comprises a signal acquisition control unit and a flexible channel establishing unit, wherein the signal control acquisition unit is used for generating a control signal for controlling the flexible channel establishing unit to act after acquiring thunder and lightning physical quantity or static physical quantity or receiving an early-warning signal, outputting the control signal to the flexible channel establishing unit, and controlling the action of the flexible channel establishing unit; after receiving the control signal of the signal acquisition control unit, the flexible channel establishing unit acts according to the requirement of the control signal and generates laser, flames, plasma, electric arcs, high-frequency and high-voltage electric waves and conductive gas or conductive gas and liquid mixtures, and a charge discharge channel is established in a space or on the ground. The charge discharge channel established through flexible conductive substances is longer, an establishment angle can be adjusted more easily, and the discharge capacity is improved.

The invention discloses a lightning activity expert analysis system on the basis of a GIS (geographic information system) technology. The lightning activity expert analysis system comprises a lightning data importing module, a data recalculation module, a lightning parameter statistics module and a display and output module. The lightning data importing module reads lightning sample data from lightning databases; the lightning parameter analysis module analyzes and calculates the verified lightning sample data; analysis results are displayed or outputted by the display and output module. The lightning activity expert analysis system has the advantages that the lightning activity expert analysis system on the basis of the GIS technology is researched and created by the aid of the GIS spatial analysis technology, so that spatial distribution of lightning information can be displayed and analyzed, lightning parameters can be conveniently and quickly analyzed, a full-set scheme can be provided for analyzing statistics samples of the measured data of lightning positioning systems, counting complete regional lightning parameters and counting corridor lightning parameters of power transmission lines, lightning protection design and evaluation platforms are provided for power grids, and powerful decision support can be provided for lightning protection work of the power grids.

The invention discloses a method and device for detecting overvoltage of a circuit breaker under multiple lightning strokes, and the method comprises the steps of collecting the data of equipment in astation, building a lightning invasion wave simulation model of a line-transformer substation in an electromagnetic transient program according to the data of the equipment in the station, the circuit breaker being simulated through a Cassie arc model; and acquiring lightning overvoltage of the circuit breaker in real time by adopting a multiple lightning counterattack tower and a shielding failure wire in the simulation model. According to the invention, the problems that the overvoltage of the circuit breaker under multiple lightning strokes is difficult to simulate and the simulation result is inaccurate are solved.

The invention provides a transaction method and device, and a storage medium. The method comprises the following steps: sending first registration request information of a registration service to a server; receiving channel creation notification information pushed by the server; in response to deposit of the current user in the first channel, sending a first deposit transaction to the server; receiving first deposit notification information, and updating first expendable asset limit information of the current user in the first channel; receiving second deposit notification information pushed by the server, and updating second expendable asset limit information of a second user in the first channel; in response to account transfer of the current user to the second user in the first channel,sending a first offline transaction to the server; receiving and storing a second off-chain transaction sent by the server; wherein the first off-chain transaction and the second off-chain transaction are used as evidences for asset clearing of the first contract when the current user or the second user requests to clear the first channel. The application improves the application efficiency of the lightning network or the lightning network.

The invention relates to the technical field of lightning signal automatic identification, in particular to an automatic identification method and system for a lightning ground flash return stroke waveform and electronic equipment. The method comprises the steps: collecting a real lightning signal; recognizing the waveform of the real lightning signal by using a pre-trained recognition model; obtaining and outputting a recognition result; wherein the identification model obtained by pre-training is obtained by performing lightning signal category labeling and feature extraction on collected lightning original waveform data, performing feature screening according to the importance degree of each feature, and training the screened features based on a machine learning algorithm. A machine learning method is adopted to establish an automatic identification model of lightning ground flash return stroke, a large number of time domain and frequency domain characteristic parameters can be extracted through self-learning and self-training of sample data, lightning waveform automatic identification is performed based on the identification model, the identification accuracy can be greatly improved, and the identification efficiency is improved. The problems of misjudgment and missed judgment caused by identification based on fixed and few time domain features are solved.