39results about How to "Reduce trip rate" patented technology

The invention relates to a system for power grid thunderstorm disaster warning based on recognition and forecast. The system is characterized by comprising a thunderstorm forecast information module, an early warning data analyzing module, a power grid thunderstorm risk early warning module and a display module all connected with one another in sequence. The invention further relates to a method which adopts the system to perform power grid thunderstorm disaster early warning. The system and the method utilize region thunderstorm characteristic and regional power grid characteristic, and combine the anti-thunderstorm design parameters and the on-site geographical conditions of power grid equipment including various transformer substations, electric transmission lines, pole and the like, so as to realize real-time automatic monitoring on the thunderstorm disaster, perform actual condition analysis quantitatively at a specific time and location and near-disaster early warning and perform fine instructional functions on production and scheduling of power grid.

The invention relates to a lightningproof device, in particular to a puffer arc quenching lightningproof clearance device used in varies voltage grades transmission lines. The puffer arc quenching lightningproof clearance device comprises a conductor connection body, an earthing connection body, a gas generation device, a signal acquisition device, a high-voltage electrode, an earthing electrode, etc. The gas generation device is arranged near an electrode gap formed between the high-voltage electrode and the earthing electrode. The signal acquisition device generates signal after the generation of the arc. The gas generation device is started and therefore generates the airflow capable of blowing out the arc. The invention has the following benefit effects: the device features wide application, light weight, convenient transportation, assembly and disassembly, re-use, lower operation cost as well as environment protection; the device is fast in action, which is able to extinguish the arc quickly and enhance the success rate of recloser; the device is capable of decreasing the trip rate of the transmission line, and protect power facilities, thus being good for the power safety production and improving the power grid reliability.

The invention discloses an electric transmission line forest fire early-warning method. According to the method, the forest fire early-warning levels of current electric transmission lines at the corresponding period are calculated according to historical fire point data monitored by a satellite, rainfall data and industrial and agricultural customs with fire of a target area, and an early-warning list according to the early-warning levels is made. Line operation and maintenance staff can reasonably arrange forest fire preventing resources according to the current early-warning levels provided through the method, forest fire prevention and control efficiency and the resource utilization rate are effectively improved, waste of manpower and materials is reduced, the trip-out rate of the electric transmission line due to forest fires is reduced, and safety and stability of an electric system are improved.

The invention discloses an adjustable power transmission line windage yaw preventing device. The adjustable power transmission line windage yaw preventing device is formed into a triangle by a windage yaw preventing insulator [2], a tower [1] and a line insulator [3]; the windage yaw preventing insulator [2] is fixed on the tower without rotating so as to prevent a conductor [4] from driving the line insulator [3] to deflect under the action of wind. The windage yaw preventing insulator is composed of a U-shaped bolt [24], a support fitting [21], a support [22], a connecting rod [23] and a special insulator [25], wherein the support fitting [21] and the support [22] are connected by welding; an assembly is formed in such a manner that the support fitting [21] and the support [22] are fixed on the tower by use of the U-shaped bolt [24], one end of the connecting rod [23] is fixed on the support [22], while the other end of the connecting rod [23] is connected to the special insulator [25], and then the special insulator [25] is connected with the conductor [4].

The invention relates to a comprehensive prevention and control method for rural power grid distribution line fault. The method comprises the following steps: step 1, analyzing line fault causes, and determining distribution rules of the rural power grid distribution line fault; step 2, managing the shortcomings of the rural power grid distribution lines according to line fault geographical distribution rules; and step 3, upgrading and improving the rural power grid distribution lines according to the line fault geographical distribution rules. The comprehensive prevention and control method, by combining power network planning and related conclusions of power grid development diagnosis, designs a whole set of comprehensive prevention and control method for the distribution line fault of the rural power grid on the basis of analyzing rural power grid distribution line fault causes and investment capacity, for guiding the operation and maintenance of the rural power grid distribution line, effectively preventing distribution line faults and feasibly ensuring reliable operation of the rural power grid distribution line.

The invention discloses a tower head capable of preventing windage yaw. The tower head capable of preventing the windage yaw comprises a tower pole (1), a vertical hanging piece (2) and an inclined strutting piece (3), wherein a hanging point of the vertical hanging piece (2) is positioned at an insulator hanging position of the original tower pole (1); the tower pole (1), the vertical hanging piece (2) and the inclined strutting piece (3) form a triangle; the lengths of the vertical hanging piece (2) and the inclined strutting piece (3) can be adjusted according to different types of the tower pole (1); the vertical hanging piece (2), the inclined strutting piece (3) and the tower pole (1) are independent, and are dismountable. With the adoption of the tower head, the insulator hanging point can be lowered, so that when the insulator deflects, the distance between the conducting wire and the tower cross arm is increased, the anti-wind capability of the line can be improved, and the windage yaw discharge of the line can be reduced.

The invention discloses an image recognition method for bird species related to a bird-related fault of a power transmission line. The image recognition method comprises the following steps of: firstly, establishing a bird-related fault related bird species image database by collecting bird species information around the power transmission line, and performing background removal preprocessing on a bird species image based on a category activation graph method; then, establishing a learning model by using four deep convolutional neural networks, pre-training the learning model through an ImageNet data set, finely tuning the pre-trained model network structure, re-training the finely-tuned model by using the pre-processed bird species image training set, and classifying and identifying a test set; and finally, according to the classification accuracy of the four network models, establishing a bird-related fault related bird species image recognition model fused with the multi-convolutional network by adopting a linear weighting method, and carrying out classification recognition on bird species images. According to the invention, a correct bird identification method and means can be provided for operation and maintenance personnel of the power transmission line, differential prevention and control of bird-related faults can be realized, and the trip-out rate of the bird-related faults can be reduced.

The invention relates to the technical field of high voltage lightning protection for power engineering transmission line, especially to a method and device for suppressing overvoltage of an iron tower head when lightning strike of a transmission line. The method comprises the following steps of: setting a coaxial overhead cable according to a magnitude of a wave impedance value of an overhead lightning protection line; designing a low-impedance coaxial cable down conductor; and connecting and installing the coaxial overhead cable, the coaxial cable down conductor and a ground lightning arrester to the iron tower, and connecting the ground lightning arrester to a grounding grid. The occurrence of tripping accidents and counterattacks during lightning strikes can be reduced.

The invention relates to a same-tower four-loop power transmission line configured with differentiation insulators, which belongs to the technical field of lightning protection in a power system power transmission line and comprises a first line, a second line, a third line and a fourth line, a first insulator, a second insulator and a third insulator. The three insulators have different insulation strength. The first insulator is erected on wires on each phase of the first loop to form a weak insulation loop. The second insulator is erected on wires on each phase of the second loop, and the third insulator is erected on wires on each phase of the third loop and the fourth loop to form a strong insulation loop. By means of the differentiation insulation method, simultaneously trip-out rate of double-loop lines and multi-loop lines can be effectively reduced with lower cost, and overall trip-out rate and single-loop trip-out rate of the weak insulation loop cannot be sacrificed.

The invention discloses an easy disassembly bird control device. During the process of installation of the bird control device, a fixed plate [14] is put into an angle steel of pole and tower; a locking bolt [13] is tightly screwed; a bird proofing splinter [4] is evenly unfolded into a round shape; then a fixation device [2] is tightly screwed; at last, a U-shaped bolt [12] of a mounting base [1] is tightly screwed. Thus, the bird control device is installed. In need of disassembly of the bird control device, first the U-shaped bolt of the fixation device [2] and the U-shaped bolt [12] of the mounting base [1] are unscrewed; then, rotatable needles are rotated together; the bolt [12] of the mounting base [1] is unscrewed. Thus, the bird control device is disassembled. By use of the bird control device, the installation and disassemble of bird proofing splinters on electric transmission pole and tower are facilitated; installation quality of bird proofing splinters are guaranteed; trip rate of electric transmission line caused by bird damage is effectively reduced.

The invention discloses a wireless passive temperature measurement monitoring method for substation high-voltage switch cabinets. The method comprises the steps of: (1) integrating UHF electronic tagson temperature measurement sensors, mounting the temperature measurement sensors in the high-voltage switch cabinets by watch pocket type structures, and mounting temperature measurement data acquisition devices communicated with the UHF electronic tags in the high-voltage switch cabinets; (2) by the temperature measurement data acquisition devices, acquiring data measured by each temperature measurement sensor, and uploading the data to a station side management display screen for display; and (3) uploading the data to a remote online monitoring terminal by the station side management display screen, and carrying out centralized monitoring on a temperature condition of each substation high-voltage switch cabinet in a region which needs to be monitored. According to the invention, later maintenance cost of batteries and the sensors is avoided; the wireless passive temperature measurement monitoring method is energy-saving and environmental-friendly; a power supply wire and a data transmission cable are completely omitted; maintenance-free temperature measurement of high-voltage switch equipment can be implemented; power grid accidents are reduced; a trip-out rate of a power grid is reduced; and reliable operation of the power grid is greatly improved.

The invention discloses a multi-cavity modular self-assembly structure and a processing method. The multi-cavity modular self-assembly structure comprises a grounding module, a high-voltage end module and a plurality of middle modules, wherein the plurality of middle modules are located between the grounding module and the high-voltage end module, the plurality of middle modules are detachably connected in a joggle joint mode, and the middle modules, the grounding module and the high-voltage end module are detachably connected in a joggle joint mode. The multi-cavity modular self-assembly structure is in contact with an air gap through the grounding module and is connected with a lower arc guide arm through the high-voltage module. Due to the fact that the free assembly type modular structure is adopted, the number of arc extinguishing chambers can be combined at will, and the structure used for a middle-low voltage level circuit is obtained. Compared with an existing integrated multi-cavity arc extinguishing structure, the multi-cavity modular self-assembly structure is low in error rate in the machining process, it can be guaranteed that the structural strength is still stable, and impact arcs can be rapidly extinguished.

The invention discloses an anti-windage yaw jumper arrester for a 500kV power transmission line, which comprises an arrester body I, an arrester body II and a discharge gap assembly, the arrester body I and the arrester body II have the same specification, and the ends, close to each other, of the arrester body I and the arrester body II are connected; the arrester body II is connected with the ends, close to each other, of the discharge gap assemblies, a resistor disc column is arranged on the inner side of the arrester body I, an epoxy glass fiber winding pipe is arranged on the outer side of the resistor disc column, and the gap between the resistor disc column and the epoxy glass fiber winding pipe is filled with silicon rubber. A lightning arrester silicon rubber umbrella cover is arranged on the outer side of the epoxy glass fiber winding pipe. The windage yaw prevention jumper wire lightning arrester for the 500kV power transmission line is high in insulation sealing performance and safety, can effectively avoid windage yaw of a drainage jumper wire, integrates the functions of a jumper wire string, a heavy hammer sheet, a V-shaped insulator string and a conventional line lightning arrester, is low in installation and construction difficulty, and is suitable for popularization and application.

The invention discloses a power transmission line fault and abnormal discharge monitoring system. The system comprises a monitoring terminal which is used for collecting waveforms, dividing the collected waveforms into a power frequency waveform, a discharge current waveform and a fault traveling wave current waveform, forming a machine code, and transmitting the machine code back to a data center in a wireless mode; the data center which is used for receiving the waveform information returned by the monitoring terminal, restoring original waveform data through an analysis means, storing the original waveform data in a corresponding table structure, processing and analyzing the original waveform data, and storing an analysis result; and a front-end display system which is used for reading data contents in the data center table structure and visually displaying the data contents. The technical problems that in the prior art, an infrared imager, a laser range finder and the like are adopted for troubleshooting on site, video visualization monitoring has the defects of small monitoring area, large flow consumption and high cost, and manual inspection is low in instantaneity, large in workload and the like are solved.

The invention relates to an anti-collision overhead conductor device, a crane system and a crane anti-collision overhead conductor method. The anti-collision overhead conductor device comprises a scanning distance measuring module and a data display module. The scanning distance measuring module comprises a laser radar, a data processing part and a data transmission part connected in sequence; thelaser radar is used for scanning and measuring distribution conditions of objects in a range wound overhead conductors to generate data and transmitting the generated data to the data processing part; the data processing part is used for transmitting the processed data to the data transmission part after arrangement and calculation of the data; the data display module is in communication connection with the data transmission part; and the data transmission part is used for transmitting the collected data to the data display module. The anti-collision overhead conductor device, the crane system and the crane anti-collision overhead conductor method can reduce the conductor touch risk of the crane construction operation in fixed points, reduces the circuit trip-out rate, and improves the circuit operation and maintenance quality.

The invention discloses a substation small resistor grounding device and a control method thereof. The device comprises a grounding transformer, a neutral point small resistor, a first split-phase switch, a second split-phase switch, a third split-phase switch, a bridging switch and a grounding resistor. The output end of the grounding transformer is connected with one end of the neutral point small resistor, and the other end of the neutral point small resistor is grounded; the first phase input end of the grounding transformer is connected with one end of the first split-phase switch, the second phase input end is connected with one end of the second split-phase switch, and the third phase input end is connected with one end of the third split-phase switch; the other end of the first split-phase switch, the other end of the second split-phase switch and the other end of the third split-phase switch are respectively connected with one end of the grounding resistor, and the other end of the grounding resistor is grounded; one end of the bridging switch is connected with one end of the neutral point small resistor, and the other end is connected with one end of the grounding resistor. According to the invention, most of instantaneous faults can be eliminated, and the tripping rate of a single-phase earth fault is reduced.