146results about How to "Reduce the number of outages" patented technology

The invention relates to the field of electric power system monitoring, in particular to a cable 10kV high voltage ring main unit remote monitoring and control system which is used for conducting real-time monitoring of operation conditions of power distribution facilities and distribution cable lines, realizing early warning and alarming of abnormal and failure states and postmortem analysis after accidents, and controlling and regulating the operating environment of equipment through remote operation. According to the cable 10kV high voltage ring main unit remote monitoring and control system, grid smart operation management serves as the target, various on-line monitoring techniques are integrated, and monitoring cameras, a fan and solar equipment are installed in a switching station; the system can be used for checking the information of the monitoring cameras in the switching station in real time, monitoring the operating state of the fan, realizing the early warning and alarming of the abnormal and failure states and the postmortem analysis after the accidents, realizing dynamic evaluation of health conditions of the equipment, and realizing remote operation control over monitoring of the equipment; a multi-dimensional display technology is combined, safe and reliable operation capacity of a distribution network is enhanced, trouble shooting efficiency and maintenance efficiency are improved, and therefore a complete set of grid visual monitoring system is formed.

The invention discloses a method based on the topology protection of a distributing network, which comprises the following steps: (1) all distributing automation terminals respectively form a distributing network topology structure, and each distributing automation terminal is linked with adjacent nodes in a lateral communication mode; and (2) whether each switch is an adjacent node is judged based on a line failure criterion; if yes, the network topology protection corresponding to the switch is activated to trip the switch of the node; and otherwise, the network topology protection is not activated, wherein the line failure criterion is as follows: if the switch is not a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N adjacent nodes, the fact that the switch is a failed adjacent node is judged; and if the switch is a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N nodes including the transformer substation outlet switch, the fact that the transformer substation outlet switch is a failed adjacent node is judged. The method can rapidly, accurately and selectively position the failure and isolate the failure.

The invention discloses a self-healing control method of a distribution network, which adopts centralization coordination and the distribution coordination, has self-adaptability during signal treatment and generation of a control strategy, and can automatically complete the control process without manual intervention to coordinate actions of a relay protection device and a protection control device, actions of a switch and a smart switch and the action of a safety automatic device. The method comprises a distributed self-healing control step and a centralized self-healing control step, can determine the current operation state of the distribution network by collecting the voltage data, the current data, the on-off state and the like, and can apply an intelligent method to make a decisionso as to coordinated control the switch, the protection control device, the safety automatic device and the like, thereby enabling the distribution network to always transfer to a more healthy state,improving the safety, the reliability, the quality and the economy of the distribution network and enhancing the emergency capacity.

Disclosed is a power distribution network fault handling method based on self-recovering control. By a centralized and distributed coordination power distribution network fault self-recovering control method, signal processing and control strategy generation are adaptive, the control process is automatically completed without manual intervention, and behaviors of a relay protection device and a protection control device, a switch and an intelligent switch, and an automatic safety device are coordinated. The power distribution network fault handling method includes the steps of automatic detection of power distribution network faults, distributed self-recovering control and centralized self-recovering control.

The invention provides a stimulating type demand response-based micro power grid load shedding control method which comprises the following steps: an aim of minimum dispatching cost is set so as to build a stimulating type demand response-based power grid side economic dispatching model; an aim of minimum user economic loss is set to build a user side response module; moreover, current operation condition of a micro power grid is obtained; the power grid dispatching model and the user response model are subjected to solving operation; according to a solving result, whether to conduct stimulating type demand responding operation or direct loading shedding operation is determined. Via use of the load shedding control method put forward in the invention, demand side resources can be used as substitutable resources for micro power grid distributed electric power generation and energy storage; micro power grid investment and operation cost can be lowered, load power failure frequency and power failure time can be reduced, and reliability of micro power grid power supply can be improved.

The invention provides a method, a device and a system for performing video monitoring on an outdoor ring main unit. The method provided by the invention comprises the following steps: receiving and storing video images collected through a camera video and transmitted after being digitally processed in the ring main unit; performing image identification on the video images to judge whether the insulating surfaces of ring main cables have discharging trace or condensation; and if so, automatically generating alarm information and informing maintenance staffs. According to the method, the device and the system for performing the video monitoring on the outdoor ring main unit, whether the insulating surfaces of the cables in cable chambers of a plurality of ring main units have discharging trace or condensation can be judged, so that unnecessary power outage times caused by site detection are effectively reduced, the ring main unit is enabled to more safely and reliably supply power for users, and the requirements of the users on continuous power supply are met.

The invention aims at the characteristics of randomness and suddenness of power grid equipment faults. Therefore, the problem is difficult to accurately predict; the invention provides a method for enhancing operation and maintenance management and control of distribution network equipment. The invention belongs to the technical field of power grid equipment operation. Big data technologies such as clustering analysis, machine learning and the like are applied to effectively integrate and mine system data such as an electricity consumption information acquisition system, PMS2.0, D5000 and thelike; data islands among the systems are broken through, an equipment fault prediction model is established according to an adjacent propagation effect analysis theory, the equipment fault occurrenceprobability can be pre-judged in advance, equipment maintenance can be arranged in advance, the power failure frequency and time are reduced, the power supply quality is improved, and the operation and maintenance level of a distribution network is greatly improved. According to the method, an alarm signal is sent out before an equipment fault occurs, the equipment fault is pre-judged in advance,a coping strategy is provided, the big data technology is innovatively applied to predict the possibility that the equipment has faults in future according to historical fault records, and a passive repair working mode is changed into an active repair working mode.

The invention discloses a method for optimizing and balancing power-cut schemes. The method includes the steps that firstly, safety analysis checking is conducted on the drafted power-cut schemes, probably-caused safety risks and reliability of the power-cut schemes are comprehensively evaluated and analyzed, safety early warning is conducted in time before the schemes are executed, and therefore potential safety hazards are reduced; the power-cut schemes passing safety analysis checking are kneaded and analyzed, the power-cut schemes with the overlapped power-cut ranges are kneaded, the number of power-cut times of users is reduced, and therefore power supply reliability is improved; scheduling analysis is conducted on the kneaded power-cut schemes, the power-cut schemes of different types such as overhauls, service expansion and defects are comprehensively considered, factors such as holidays and festivals, electricity protection tasks and important users are considered in the scheduling process, dispatching, work area and construction unit workloads are distributed in a balanced mode, and a scientific power-cut time arrangement scheme is proposed.

The invention discloses an intelligent power distribution network self-healing control method based on a peer-to-peer communication network. The intelligent power distribution network self-healing control method comprises the following steps of 1) enabling an intelligent feeder line terminal to periodically detect whether a line is normal or not, if the line is normal, enabling each intelligent feeder line terminal to execute periodical self detection, and if the line is abnormal, beginning to implement a step 2); 2) performing network protection starting judgment, if a starting criterion is not satisfied, finishing a program; and if the starting criterion is satisfied, activating a network protection program and beginning to implement a step 3); 3) performing a fault positioning program, judging whether a fault isolation mark is already set or not, if not, beginning to implement a step 4), and if so, beginning to implement a step 5); 4) performing a fault isolating program; 5) performing a primary reclosure program, judging whether reclosure is successful or not, if not, beginning to implement a step 6), and if so, beginning to implement a step 7); 6) performing a load transferring program; 7) performing a mark position reset program; and 8) completing the program. By adoption of the intelligent power distribution network self-healing control method, various kinds of potential hidden dangers can be found in time, prevented and isolated, faults can be repaired automatically, and power supply can be recovered rapidly.

The invention discloses a high speed railway power supply network system comprising a traction substation, feed line breakers 1DL and 2DL, an AT station, feed line breakers 3DL and 4DL, an AT subarea station, feed line breakers 5DL and 6DL, an uplink traction network power supply arm and a downlink traction network power supply arm, a first protective relaying device, a second protective relaying device and a third protective relaying device; when detected 1DL and 2DL protection measured values are bigger than a setting value1, or the detected 1DL and 2DL protection measured values are defined between the setting value1 and a setting value2, and a control signal sent by the second or third protective relaying devices is received, the first protective relaying device can control the traction substation feed line breakers to make protection motions, thus breaking the traction substation power supply. The high speed railway power supply network system can solve the problems that a load current and a power supply arm end short circuit current cannot be effectively distinguished; the invention also discloses a high speed railway power supply network system protection method.

The invention discloses a comprehensive state evaluation theory method for new intelligent station relay protection equipment. The method comprises steps: a protection device is adopted as a monitoring platform for the device itself, the protection device is self detected, first parameters of the protection device and second parameters of a secondary circuit are acquired, and the first parametersand the second parameters are transmitted to a signal processing system, wherein the secondary circuit is used for monitoring the circuit where the device and the protection device are connected; andbased on the first parameters and the second parameters, state evaluation is carried out: an evaluation component and a scoring principle for the whole device are set, and the equipment in the relay protection device or an interval operation condition can be evaluated. When the method of the invention is applied, an intelligent closed loop management process of intelligent acquisition, risk earlywarning, state evaluation, maintenance strategy and measure management for state maintenance of the substation relay protection equipment can be realized, and the purposes of safe and reliable equipment operation and economic and reasonable maintenance can be achieved.

The invention discloses an online state maintenance intelligent decision analysis device used for a relay protection device, and a signal processing method and an application thereof, and belongs to the field of application of the information technology of power systems. The online state maintenance intelligent decision analysis device used for the relay protection device comprises a data acquisition unit, a data adapter, a storage unit, a state evaluation unit, a warming detection unit, a maintenance decision-making unit, a guide unit, a guide configuration interface unit, a controlling unit, a universal algorithm module, an arithmetic configuration interface unit and a WEB page presentation unit. After the attribute information of the quantity of state of the relay protection device is collected in real time, the maintenance decision analysis and the warning detection to various protection devices in the power network can be realized through the universal state evaluation algorithm model in the independent module.

The invention relates to a live-working drainage wire bracket which is characterized in that a plurality of through holes (21) are uniformly formed in a sleeve (2); the rear end of the sleeve (2) is connected with a fixing device (4) through a T-shaped plate (22); elastic pins (11) in match with the through holes (21) are arranged on a moving rod (1); a fixing clamp (5) is arranged at the end part of the moving rod (1); the fixing device (4) consists of a left semicircular bracket (41) and a right semicircular bracket (42); one end of the left semicircular bracket (41) is hinged with one end of the right semicircular bracket (42); the other end of the left semicircular bracket (41) is fixed on one side of the T-shaped plate (22); the other end of the right semicircular bracket (42) is slightly shrunk and is movably connected with the other side of the T-shaped plate (22), so that the right semicircular bracket (42) can be opened and conveniently fixed on a electric power pole. By adopting the bracket, a live-working drainage wire can be effectively fixed, the times of power outage are greatly reduced, and the reliability in power supply is improved.

Provided is a ratchet wheel type combined tool for fastening a jumper conductor clamp in a charged mode. The ratchet wheel type combined tool comprises a ratchet wheel wrench (5), a connection assembly and an insulation operation rod (1), wherein the ratchet wheel wrench (5) is formed by the mode that one end of a handle (4) is connected with an open type nut wrench (4.1) and the other end of the handle (4) is connected with a closed type ratchet wheel wrench (4.2); the connection assembly is composed of a clamp, a penetrating bolt (3.1) connected to one side of the clamp, and a nut (3.2). The ratchet wheel type combined tool has the advantage that the shortcomings of one-way tension resisting jumper conductor clamp indirect operation and heating of a charged jumper conductor clamp of an overhead transmission line in the same tower multi-circuit vertical arrangement mode are overcome. The tool is used for overcoming the heating defect of the charged jumper conductor clamp, investment of operation personnel and tools is reduced, operation intensity and operation risk of the operation personnel are lowered, efficiency is improved, cost is lowered, the electric reliability is improved, and the number of times of power failure is reduced.

An operating rod special for anti-bird instrument live-line installation comprises a sleeving rod, a rotation rod and a fixed part. The sleeving rod is provided with an axial cavity. The rotation rod is coaxially assembled in the axial inner cavity and is capable of moving up and down relative to the sleeving rod. The upper end surface of the rotation rod is provided with a counter bore. The lower part of an inner cavity of the counter bore is six-row-shaped. The fixed part comprises a sleeving ring and a clamping part. The sleeving ring is provided with an inner thread and is connected with the outer wall of the upper end of the sleeving rod. The clamping part of the fixed part is provided with a U-shaped bayonet, a base plate of the U-shaped bayonet is arranged at the left side of the outer wall of the sleeving rod, and the right end of a top plate of the U-shaped bayonet extends to the part above the upper end surface of the sleeving rod. The operating rod is capable of realizing anti-bird instrument live-line installation and fundamentally solving the problem that a plurality of power failures of a power line are caused due to power-off installation of an anti-bird instrument, so that the frequency and time of power failures of the power distribution line are reduced, the continuous stability of power supplying is improved, the service level of power supplying is improved, the labor intensity of operators is reduced, and the operation safety is ensured.

The invention relates to the field of GW6 series alternating high-voltage isolating switches of a flexible busbar in a power grid 220 kV substation and particularly relates to a live replacement method for a static contact of the 220 kV flexible busbar. The live replacement method for the static contact of the 220 kV flexible busbar is characterized in that operation persons ascend to the position below the flexible busbar along an insulation herringbone ladder and subject the static contact of the flexible busbar to live replacement by means of using an idiostatic method to transfer potentials, and the live replacement method includes a detachment step and an installation step. Compared with replacement methods in prior art, the live replacement method for the static contact of the 220 kV flexible busbar has the advantages that the insulation herringbone ladder is used as an insulation manned platform and meets the requirement of an equipotential operation method, and the insulation herringbone ladder is small in size, can be lifted below the flexible busbar, and is applicable to live replacement operation for static contacts of GW6 series sing-column and double-column vertical opening type isolating switches of the 220 kV flexible busbar; the live replacement method is capable of promoting scientific and technological progress and has obvious social benefits and economical benefits; and the live replacement method fills the gap in the live replacement projects of the static contacts of the isolating switches and has a broad application prospect and a popularization value in national grid systems.

The invention discloses a method and a device for providing electric power system information, solving the problem that the efficiency of searching the electric power system information is lower in the prior art. The method comprises the following steps: saving association relationship between interval and electrical equipment according to the predetermined interval partition scheme; and searching and outputting electrical equipment information or interval information according to the received inquiring command and the association relationship. The technical scheme provided by the invention is contribute to efficiently searching the electrical equipment information.

The invention discloses a loop closing power supply switching control method for a distribution network. The method comprises firstly obtaining all loop closing power supply switching paths in a distribution network and interconnection switches corresponding to various loop closing power supply switching paths; determining a loop closing power supply switching path where a loop closing power flowcannot exceed a threshold after loop closing according to various interconnection switches; and deleting the loop closing power supply switching paths where the loop closing power flow exceeds the threshold after loop closing. It can be seen that the control method can realize a power supply switching loop closing operation according to the determined loop closing power supply switching path wherethe loop closing power flow cannot exceed the threshold after loop closing during distribution network maintenance or system failure, avoids a case that overloaded line or equipment causes protectiontrip-out because of overlarge loop closing power flow after the loop closing, avoids an operation mode of cutting off the power first and then achieving power supply switching, thereby reducing the number of power outages and improving the reliability of the power supply. In addition, the present invention also discloses a loop closing power supply switching control device and apparatus for a distribution network, having the above effect.

The invention discloses a charged body distance measurement and alarm device based on combination of electric field and radar. A detection part comprises an electric field intensity measuring module, a radar ranging module, a signal conditioning circuit, a first single-chip microcomputer, and a wireless data sending module. An alarm part comprises a wireless data receiving module, a second single-chip microcomputer, and a sound-light alarm module. The device measures the electric field intensity at the location thereof and the distance between the device and a surrounding object in real time, compares the electric field intensity and the distance with corresponding thresholds respectively, judges whether there is a need for alarm and the alarm level, and gives a sound-light alarm to remind the staff to pay attention. The device is simple in installation, makes judgment quickly and accurately, and can effectively protect the safety of operation vehicles and personnel.

The invention provides a bird repelling device structure and a special mounting rod thereof. Tapered holes are formed in the left and right sides of a fastening bolt on a lower arm of a U-shaped base respectively and large-opening ends of the tapered holes are formed downwards; the conicity of the tapered holes is the same as that of a tapered column and the axial length is relatively small; a blind threaded hole matched with the fastening bolt is formed in the lower end face of a pressing plate; the tapered column penetrates into the tapered holes to be connected with the pressing plate through a screw; the rigidity of the U-shaped base is greater than that of the tapered column. The structure is fixed on a cross arm through the extruding effect of an upper arm of the U-shaped base and the pressing plate. The left and right ends of the pressing plate are matched with the U-shaped base through the tapered column penetrating through the tapered holes of the U-shaped base and the middle part of the pressing plate is matched with the fastening bolt; when the pressing plate is subjected to an upward acting force of the fastening bolt, the pressing plate moves upwards to drive the tapered column to move upwards, and the extrusion is formed among the tapered column and the tapered holes in the U-shaped base, so that a matching relation with a relatively great magnitude of interference is generated among the tapered column and the tapered holes; the stability after the pressing plate is positioned can be ensured and the electrified work mounting of a bird repelling device is realized by the special mounting rod.

The invention relates to an overhead line phase sequence plate hot-line assembly and disassembly method and an assembling device, and belongs to the technical field of power supply maintenance and construction. According to the technical scheme, the assembling device comprises side baffles (1), a main substrate (2) and a connector (3), the main substrate is a square insulating board, the side baffles are arranged on three edges of the obverse side of the main substrate and are integrally of a U type, each U-type side baffle is open upwards, the side baffles are also insulating boards and are bonded to the main substrate through vertical boards (4), a gap is reserved between each side baffle and the main substrate, the thickness of each gap is equal to the height of the corresponding vertical board, a slot (5) is formed by the side baffles, the main substrate and the vertical boards, and the connector is arranged on the reverse side of the main substrate. The assembling device is simple in structure, flexible in use and capable of conveniently assembling or disassembling phase sequence plates, the problem that operating personnel need to ascend is solved, labor intensity is relieved, the insulating effect is achieved, safety is guaranteed, the line outage frequency is reduced, and the power supply reliability rate is guaranteed.

The invention discloses a cable defect studying and judging method based on an outlier detection algorithm. The cable defect studying and judging method comprises the following steps: 1, acquiring andpreprocessing data; 2, analyzing the data by using a DDPOS algorithm, if the outlier factor of the outlier is greater than 1.2, determining the outlier as a suspicious outlier, otherwise, determiningthe outlier as a normal point; 3, setting a threshold value, and if the data of the suspicious outliers is greater than the threshold value, determining the suspicious outliers as fault points; otherwise, continuing to perform outlier detection by using the DDPOS algorithm again, if the outlier factor of the suspicious outlier is greater than 1.05, determining the suspicious outlier as a suspicious fault point, and otherwise, determining the suspicious outlier as a normal point; and 4, fault prediction: comparing and matching the determined data of the fault point and the suspicious fault point with historical data in a fault database, and predicting a fault type. According to the invention, power failure times caused by cable faults can be reduced, the power supply reliability of a powersystem is improved, the cable operation and maintenance cost is reduced, and the cable operation environment safety is ensured.

The invention relates to an analytic system provided with an energy efficiency online monitoring and analyzing device for a distribution transformer. The analytic system is characterized by comprising a transformer, a primary side voltage sensor, a primary side current sensor, a secondary side voltage sensor, a secondary side current sensor, a temperature sensor, a digital-analogue conversion module, a signal processing module, a GPS clock, a real-time monitoring module, an LCD and a processor module. The analytic system provided by the invention is simple in structure and reasonable in design, and monitors voltage and current values of the primary side and secondary side of the transformer in real time, calculates the actual operating loss of the transformer, analyzes the relevancy factors which affect the energy efficiency of the transformer and searches for modes and methods for improving the operating energy efficiency according to the load operating condition of the transformer so as to reduce the loss of the transformer and reduce the number of times of power failure caused by transformer faults, so that high efficiency, low loss, low fault operation and refined management of a transformer region of a power distribution network are realized.

The invention discloses an AC/DC power supply transfer box and a comprehensive automation transformation method. The AC/DC power supply transfer box comprises a control main power supply transfer part, wherein the control main power supply transfer part comprises multiple control power supply incoming interfaces, multiple control power supply outgoing interfaces and a first terminal bar, the first terminal bar is used for connecting the control power supply incoming interfaces and the control power supply outgoing interfaces, and the control main power supply transfer part is used for providing a transfer interface between small bus incoming cables of a top control main power supply of a switch cabinet panel and control power supply outgoing cables of an integrated power supply panel. In the comprehensive automation transformation engineering of a substation, the installation and replacement operation of the integrated power supply panel can be completed by utilizing the AC/DC power supply transfer box on the premise of no power outage of a switch cabinet when an AC/DC power supply panel is replaced, thus, the device outage frequency in the transformation engineering is reduced, the construction process is optimized, the repeated labor is reduced, and the construction efficiency is improved.

The invention discloses a device and a method for treating the poor contact heating electricity of an equipment wiring board and a jumper conductor clamper, which comprises two current conduction bodies and two jumper conductors, wherein the two jumper conductors are respectively, movably and detachably connected with the two end parts of the two current conduction bodies, and respectively communicate the two current conduction bodies together, through holes which penetrate through the upper surfaces and the lower surfaces of the two current conduction bodies are also formed in the two end parts of the inner sides of the jumper conductors on the two current conduction bodies, and the two current conduction bodies are connected by a connecting piece together through the through holes. According to the treating device and the treating method, the contact surface of the wiring board and the jumper conductor clamper is changed into double-sided contact from single-sided contact, accordingly, the through-flow area of the equipment wiring board is increased, the original contact surface is distributed, and accordingly, the heating defect of the equipment is overcome.