1066results about How to "Reduce outage time" patented technology

An enterprise storage system for performing a file level backup operation on data using a mirror disk and a primary disk includes a split mechanism to split the mirror disk from the primary disk before backing data files up from said mirror disk to said sequential storage media and an extent mapping mechanism to perform extent mapping on files to be backed up in a given backup session before the split mechanism splits the mirror for the same given backup session, and an extent map check and update mechanism to check, after the split mechanism splits the mirror for the same given backup session, whether any files have been updated in a manner so as to require additional or revised extent map information.

The invention provides a distribution network automatic system based on broadband wireless communication and a realization method thereof. The distribution network automatic system comprises a distribution transformer data collecting and monitoring device, a broadband wireless communication network and a monitoring center, wherein the distribution transformer data collecting and monitoring device is arranged in a transformer site for collecting and processing electric power parameters, transmitting data to the monitoring center by the broadband wireless communication network so as to responds to a control command sent by the monitoring center. In the realization method, the distribution transformer data collecting and monitoring device is connected with the monitoring center by the wireless communication network, a protocol in coincidence with electric power 101 protocol for the data transmission is set; and the distribution transform data collecting and monitoring device collects and processes the existing distribution transform parameters of the distribution transformer and responds to the control command from the monitoring center. The invention adopts a modular system architecture design, has upward and downward compatibility, and can realize various wireless broadband module communication services; in addition, the design of stipulations of an agreement of the monitoring center is based on the electric power 101 protocol and is compatible with protocols realizing different versions.

The invention relates to an intelligent substation inspection system which comprises a data acquisition subsystem, a data communication subsystem, a server subsystem and a client subsystem, wherein the data acquisition subsystem is connected with the server subsystem through the data communication subsystem; the server subsystem is connected with the client subsystem; the data acquisition subsystem acquires the image and state information of the substation equipment and uploads the information to the server subsystem through the data communication subsystem; the server subsystem stores and displays the received data and remotely controls the data acquisition subsystem; and the client subsystem acquires the historical information of unmanned substation equipment from the server subsystem at any time and is used for remotely and intelligently inspecting the historical information. Compared with the prior art, the system has the advantages that the operating state information and the video image information of the equipment are integrated, and the visual and intelligent inspection of the substation is realized.

The invention provides a real-time data collecting and fault positioning system of a power distribution network and a working method thereof. The real-time data collecting and fault positioning system comprises transformer substation voltage collecting units, a plurality of line units, a real-time data server, a background monitoring computer and a handheld terminal, wherein each transformer substation is provided with one transformer substation voltage collecting unit; each transformer substation voltage collecting unit comprises one intelligent voltage detection terminal; each line unit comprises three fault positioning and data collecting sensors and one communication and calculation terminal; the intelligent voltage detection terminal, the communication and calculation terminal and the handheld terminal are in wireless communication with the real-time data server; the three fault positioning and data collecting sensors of the same line unit are in short-distance wireless communication with the communication and calculation terminal. The working method mainly comprises the step of carrying out real-time data collection and fault judgment. The information precision of power transmission line data which is collected in real time is high, short circuit and grounding faults are rapidly and accurately judged, the time of powering off and overhauling is shortened, the quantity of fault line patrolling workers is reduced and manpower and material resources are saved.

An apparatus and a method that prevent a split-brain problem by preventing a cluster partner from accessing and serving data when the cluster partner is taken over by a storage server, while allowing early release of reservations on the cluster partner's storage devices before control is given back to the cluster partner.

The method and mobile ad hoc network include the use of a plurality of mobile nodes. A main communication path is established from a source node through intermediate nodes to a destination node. Alternative communication paths are established among intermediate nodes defined as standby nodes to define a multipath communication pathway from the source node to the destination node. The nodes include a controller and a wireless communications device cooperating therewith. Link quality is monitored by at least one intermediate node to neighboring nodes in the multipath communication pathway, and the main communication path is reconfigured within the multipath communication pathway to at least one of the alternative communication paths based upon monitored link quality.

The invention discloses a high voltage grounding tool for power maintenance, which comprises a grounding wire chuck and an operating rod, wherein the wire chuck comprises a C-shaped hanging frame, a wire clamp moving plate and a lifting rod; a connector connected with the C-shaped hanging frame is arranged at the top of the operating rod; the upper end of the lifting rod is connected with the wire clamp moving plate; a driving mechanism connected with the lifting rod is arranged in the operating rod; the operating rod is arranged in a multi-section insertion manner; locking rings are arranged among sections of the operating rod; reducer pipes are arranged among sections of a movable casing pipe; elastic pins or key structures matched with the movable casing pipe are arranged on the reducer pipes. According to the invention, the high voltage grounding tool is hung on a wire by utilizing the C-shaped hanging frame; the wire is clamped by adopting the lifting rod; the wire-off accident is prevented; the low-position safe operation is realized; the potential safety hazard caused by the climbing operation is avoided; the working difficulty is reduced; the working efficiency is improved; the sectional design concept is adopted; the flexible variation of the length of the operating rod is ensured; in the transmission link, the interchangeable connection can be carried out; the effects are obvious.

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 relates to an on-line large power grid recovery assistant decision-making system. The system comprises two work modes, namely a real-time assistant mode and a research and analysis mode, a fracture surface operation analysis module, a calculation configuration module, a calculation function module and a calculation management module, wherein the fracture surface operation analysis module is used for fracture surface reading and fracture surface adjustment, the calculation configuration module is used for setting calculation parameters and selecting a black-start power supply and a started power supply, the calculation function module is used for system partitioning, load flow calculation, electromagnetic transient calculation, electromechanical transient calculation and path search and assessment, and the calculation management module is used for displaying system partitioning schemes, voltage waveforms, ranking of available paths and a black-start generating scheme. When the on-line large power grid recovery assistant decision-making system is used for developing an on-line electric power system recovery assistant decision-making supporting system, existing data resources in a dispatching center can be sufficiently utilized, the advantages of the method of pre-arranged scheme recovery and intelligent dispatching are combined, a model does not need to be rebuilt, the construction time and cost of the system are reduced, the real-time performance and the accuracy of suggestions to decision-making are improved, and a powerful support is provided for rapid and reliable recovery of a power grid after power outages.

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.

The invention provides a distribution network emergency repair commanding system based on marketing and distribution communication, which comprises a distribution network fault emergency repair commanding platform, a low-voltage repair fault emergency repair commanding platform, a marketing and distribution data interface service module for receiving fault repair information in real time and feeding back power-off detailed information, and a marketing and distribution integrated power grid model. The marketing and distribution integrated power grid model is based on a GIS platform and built on a basic geographic information platform basis and comprises an integrated transformer substation, a 10kV line, a distribution transformer, a low-voltage line and a client terminal. The model builds a unified and standardized topology connection relation between each level of the power grid model for realizing smooth communication between the power distribution topology and a marketing client. Accurate client data are adopted, distribution network fault and low-voltage repair fault emergency repair can be precisely researched, judged and analyzed, and with the distribution network automation remote monitoring and remote control functions, the fault emergency repair efficiency is enhanced obviously.

The turbine includes a plurality of successive stages each having a rotatable disk and blades carried thereby. A pair of adjacent rotatable disks define an annular gap therebetween and have respective opposing sealing band receiving slots aligned with the annular gap. At least one of the rotatable disks has at least one notch therein coupled to the respective sealing band receiving slot, and a sealing band is in the opposing sealing band receiving slots to seal the corresponding annular gap. The sealing band includes at least one sealing strip and at least one movable locking tang carried thereby and extending into the at least one notch to define an anti-rotational feature for the sealing band.

A system and computer implemented method for automatically performing reload licensing analysis of a nuclear reactor and preparing and generating a reload licensing report. The system and method include collecting input data and processing a plurality of nuclear reactor analysis modules. Each of the nuclear reactor analysis modules receives analysis module input data and generates analysis output data. The analysis module input data is based at least in part on the collected input data. The method also includes verifying at least one analysis output data from one nuclear reactor analysis module by comparing the analysis output data to predetermined analysis output data for the one nuclear reactor analysis module. The method further includes generating a reload licensing report for the nuclear reactor as a function of the analysis output data from two or more nuclear reactor analysis modules.

The invention discloses an intelligent longitudinally-interconnected feeder automation system which comprises intelligent power distribution terminals. Information interaction is realized through longitudinal communication protocols between adjacent intelligent power distribution terminals in a same power supply topology network. When power distribution lines fail, the intelligent terminals realize actions of fault positioning, faulted area isolation and non-faulted area power restoration before actions of an outlet switch of a transformer station through comprehensive processing and logic judgment of signals of the intelligent terminals and signals of the adjacent intelligent power distribution terminals. The intelligent longitudinally-interconnected feeder automation system realizes information interaction with the adjacent intelligent power distribution terminals in the same power supply topology network through the efficient longitudinal communication protocols. By the intelligent longitudinally-interconnected feeder automation technology that the intelligent power distribution terminals perform comprehensive processing and logic judgment, zero-time power failure of the non-faulted areas can be realized, power supply reliability is effectively improved, and power failure time is reduced.

An apparatus for delivering a tool into a nuclear reactor jet pump submerged in a reactor pool includes a frame, and a propulsion unit for controlling the movement of the tool delivery apparatus within a pool of liquid. A guide assembly provides for delivery and insertion of the tool into an inlet of the jet pump and includes a bore insertion portion. A tool position driver provides for controlling the vertical position of the tool in relation to the guide assembly.

A method for maximizing the benefits of Fault Circuit Indicators on an electrical feeder has two steps. In the first step a data set for the feeder is obtained based on historical data. In the second step, the number of FCIs and their location is calculated based on the data set obtained in the first step. The number of FCIs and their location is determined utilizing a simulation algorithm that ensures each FCI is used efficiently and provides actionable information to the utility's crew.

The invention discloses a transformer substation local discharging signal online monitoring and positioning method. Different from the traditional local discharging monitoring method which only can be used for monitoring one power equipment, the method provided by the invention is used for carrying out online monitoring and positioning on the local discharging signals of all the power equipment in a transformer substation. The method comprises the following steps of: (1) arranging an antenna array close to a central position in a space region of the transformer substation, and receiving an electromagnetic signal in the transformer substation by adopting the antenna array; (2) acquiring electromagnetic wave signals received by all antennae; (3) filtering the acquired electromagnetic wave signals, comparing the filtered electromagnetic wave signals with a standard local discharging signal; if the filtered electromagnetic wave signals are similar to or same with the standard local discharging signal, judging that a local discharging source exists in the substation; and (4) positioning the local discharging source by utilizing time difference of the local discharging signals received by two different antennae.

The invention discloses a external-insulation dry-ice cleaning system for electrical equipment, which belongs to the technical field of the external-insulation dirt removal of electrical equipment of an electrical system. The external-insulation dry-ice cleaning system adopts the structure that a dry-ice particle spray nozzle (1), an insulating adjustable bracket (2), a dry-ice transmission insulating pipe (3), a dry-ice cleaning device (5), an air compressor (6) and an air dryer (7) are sequentially connected with each other front and back, wherein the dry-ice particle spray nozzle (1), the insulating adjustable bracket (2), an insulating bracket regulating lever pipe (4) and a bracket regulating power device (8) are sequentially connected with each other from front and back, a dry-ice making granulating machine (10) is connected with a liquid carbon dioxide storage tank (11), a dry-ice insulation can (12) is independent equipment, and an earthing base (9) is taken as a safe earthing pedestal of the external-insulation dry-ice cleaning system. The invention has high dirt removing efficiency, is suitable for the on-line cleaning of an insulating sleeve and an insulating mainstay or an erected transmission line insulator inside a transformer station, and is an effective measure for safely generating the electricity and ensuring the electricity supply.

Embodiments of the present invention provide a method and an apparatus for monitoring and positioning faults in a power distribution network. The method mainly comprises steps that a power distribution line online monitoring unit distributed on a branch of a power distribution line determines a short circuit fault of the power distribution line according to the detected load current changes of the power distribution line, transmits the short circuit fault information of the power distribution line to a power distribution single-phase grounding comprehensive protection apparatus and a fault information processing apparatus; and the fault information processing apparatus, based on preset determination information, performs fusion processing on the short circuit fault information sent by the power distribution line online monitoring unit, and acquiring fault position information of the short circuit fault information. According to the embodiments of the invention, multiple power distribution faults such as short circuits, open circuits, single-phase grounding can be accurately detected; faults in the power distribution network are comprehensively solved; accidents are not enlarged; the equipment is protected; risks that people get electric shocks are reduced; and the selection of a fault line and the positioning of a fault point can be realized rapidly and accurately.

The invention provides a power distribution network dynamic power restoration method based on a load curve, which belongs to the technical field of power distribution system automation. The method utilizes a computer, realizes computing through programs and comprises the steps of inputting basic parameters; computing active load and reactive load of each node in each hour and determining a grid structure in normal operation; determining a fault section, a power supply path of the power side of the fault section and a grid structure after failure isolation; applying a traditional genetic algorithm to determine a candidate grid structure set of the least loss load in each hour during fault restoration; finally determining the optimum dynamic power restoration scheme during fault restoration. The method fully utilizes the load curve, and the dynamic restoration scheme is formulated by hour, so that the grid structure changes along with the change of the load during fault restoration, and accordingly, the method has the characteristics of being capable of effectively reducing power failure areas caused by fault, shortening power failure time for users, reducing the power failure loss of the users, and the like. The method can be widely applied to power distribution network power restoration.