38results about How to "Short outage" patented technology

The subject invention pertains to data store corruption recovery. More specifically, the invention concerns systems and methods for identifying corrupt data in a manner that prevents de-committing or removal of valid or consistent transactions from a database. This can be accomplished at least in part by logging the identities of data items that a transaction reads. Furthermore, the subject invention provides for employment of a multi-version (or transaction-time) database to reduce significantly reduce any down time or database unavailability caused by a corrupt transaction and associated corrupt data items. Accordingly, no backups need to be installed and only updates by the original corrupt transaction and transactions that read corrupt data need to be de-committed or removed.

The invention relates to a broken wire rush-repair device and a usage method. The device comprises a workbench. Fixing mechanisms are slidably connected to the two ends of the workbench. The fixing mechanisms can move in a first direction. The fixing mechanisms are connected with first fasteners. The fixing mechanisms can be fixed to the workbench through the first fasteners. The fixing mechanismsare used for fixing wire parts at the two ends of a broken wire position. A crimping mechanism connected with the workbench in a sliding manner is arranged between the two fixing mechanisms. The crimping mechanism can move along a second direction vertical to the first direction. The crimping mechanism is connected with a second fastener. The crimping mechanism can be fixed to the workbench through the second fastener, and the crimping mechanism is used for crimping the wire. By using the broken wire rush-repair device, the single-person operation is realized. The labor cost consumption is reduced, and the working efficiency is improved.

The invention discloses a quick inserting type grounding terminal and grounding wire which comprises a socket and a plug connected with a grounding wire, wherein the socket mainly consists of a socket board, a socket base and a socket cap; the socket base and the socket cap are shaped like circular tubes; the socket board and the socket base are welded together; a fixing groove is formed in the socket board; outer threads are formed on an upper opening of the socket base; a lower opening of the socket cap is provided with outer threads matched with the upper opening of the socket base; the socket base and the socket cap are in thread connection; two symmetrical bulges are arranged at the centre of the inner wall of the socket cap; a T-shaped slide block is arranged in a tube cavity of the socket base; a compression spring is sleeved on the T-shaped slide block; a circular slot is formed in the plug which has a flat head; and the width of the flat head is less than the minimum distance between the two bulges. When the flat head on the end part of the plug is inserted by an inserting port formed by the two bulges, the plug pushes the T-shaped slide block to move towards the socket board; then the T-shaped slide block is stressed to rotate the plug for 90 degrees; and under the resilience of the compression spring, the plug and the T-shaped slide block are in tight contact. In addition, a grounding wire hole is formed in the tail part of the plug.

Typically paths are provisioned in a network with a margin which allows for component variations and failures in the network and so on. By providing more information about the requirements of the link in a path request, it is possible to more efficiently calculate a route for the path through the network. The efficiency gain allows greater network utilization which in turn saves costs for the network service provider.

The invention provides a power distribution network reconstruction calculating method based on an OBDD (ordered binary decision diagram), and the method comprises the steps: S1, constructing an objective function according to a target task; S2, initializing an OBDD model of a power distribution network by combining the associated data of the target task; S3, establishing a Boolean function of thepower distribution network reconstruction constraint, generating an OBDD and solving the OBDD; S4, correcting a model and constraint conditions, and carrying out the dynamic reconstruction of the distribution network. The method employs the OBDD as the core algorithm, and a networking reconstruction scheme of the power distribution network containing a distributed power supply in a fault state iscalculated, and a regulative reconstruction scheme for the structural defects of the power distribution network in a normal state is calculated, thereby achieving the purposes that the power failure risk of the power distribution network is the lowest, the consumption degree of new energy is the highest, the network loss of the power distribution network is the lowest, the voltage fluctuation ratio is the smallest and the line loads are uniformly distributed.

The invention discloses an integrated multi-transformation-ratio transformer and a data collection method thereof. The integrated multi-transformation-ratio transformer comprises a first measuring current transformer, a first protecting current transformer, a second measuring current transformer, a second protecting current transformer, a first voltage transformer and a second voltage transformer, a secondary side winding of the first measuring current transformer comprises a head end, a tail end and at least one tap end, the first protecting current transformer, the second measuring current transformer and the second protecting current transformer are identical with the first measuring current transformer in structure, and head ends, tail ends and tap ends of secondary side windings of all transformers are connected to a secondary wiring terminal and encapsulated in an insulated fully-closed shell in an integrated manner. Adjustability in transformation ratio of the integrated multi-transformation-ratio transformer is realized, and requirements on adjustability on transformation ratio of the transformer according to load conditions when a power distribution line runs are met; the integrated multi-transformation-ratio transformer is small in size, little in occupied space, conducive to mounting and integrally attractive, wiring mode is simplified, standardization level of power distribution work is improved, difficulty in on-site construction is lowered, construction period is shortened, comprehensive cost is saved, and convenience is brought to subsequent maintenance.

The invention relates to the technical field of circuit breakers. The invention particularly relates to an intelligent miniature circuit breaker based on the Internet of Things sea computing technology and a setting method. The circuit breaker comprises a collection unit, a monitoring unit and an execution unit; the collection unit comprises a data collection module and a signal processing module;the monitoring unit comprises a central processing unit integrating an Internet of Things sea computing algorithm and a metering module; the execution unit comprises a control module, a storage module and a communication module; the signal processing module is electrically connected with the data acquisition module and the metering module; the central processing unit is electrically connected with the metering module, the control module, the storage module and the communication module; and the data acquisition module comprises a current sampling circuit, a voltage sampling circuit, a leakagecurrent detection circuit and a temperature detection circuit, and sends current detection data, voltage detection data, leakage current detection data and temperature detection data to the central processing unit through the signal processing module and the metering module respectively.

The invention discloses a separate relay protection device. The device comprises a human-machine interaction module and a box body. The human-machine interaction module comprises a front housing, a front panel, a liquid crystal plate and a front limiting plate; the box body comprises a rear housing and a rear limiting plate, the rear limiting plate is fixed to an outer wall face of a front panel of the rear housing, locking mechanisms are arranged on the left and right sides of the rear housing respectively, and locking screws are arranged on the locking mechanisms. The front limiting plate and the rear limiting plate are matched with an opening of a switch cabinet door separately; the front limiting plate is clamped to the front half portion of the interior of the opening of the switch cabinet door, the rear limiting plate is clamped to the rear half portion of the interior of the opening of the switch cabinet door, and the front housing, the front limiting plate, the switch cabinet door, the rear limiting plate and the rear housing are fixed together through multiple fastening screws. The separate relay protection device is flexible and convenient to install, and the power outagetime for replacement work is short.

The invention discloses a power grid line fault isolation device. The device comprises a power distribution network and terminal users of the power distribution network, and is characterized by also comprising a processor, a section switch, a circuit breaker, wireless communication modules, a grounding fault determining device and a transformer station server; the section switch is arranged in a trunk of the power distribution network; the circuit breaker is installed in a branch of the power distribution network, and connected with the grounding fault determining device; the processor is electrically connected with the wireless communication modules, the grounding fault determining device and the section switch; and the processor makes information interaction with the transformer stationserver via the wireless communication module. The invention also provides a power grid line fault isolation method. Via the device and method, a fault section can be located rapidly, and a fault can be isolated; the power failure scope can be minimized, power failure time in a non-fault section is short, and power utilization is more reliable; and power is delivered timely when a power delivery condition is met, and the power delivery efficiency is improved.

The invention discloses a one-out-three load transfer switch module. The module consists of a CPU and a drive circuit (6), switching devices J1 and J2, a position detection circuit (1) corresponding to the switching device J1, a position detection circuit (2) corresponding to the switching device J2, a switching device J3 and a position detection circuit (3) thereof, a silicon controlled rectifier (4), a resistor R and a capacitor C, a communication interface (8), a voltage detection circuit (7) and a load (5). The switching device J1 and the switching device J2 are bistable magnetic latching transfer switches; and the switching device J3 refers to a bistable magnetic latching switching device or a monostable normally-closed switching device. The one-out-three load transfer switch module disclosed by the invention is high in switching capacity and long in service life, and 100000 times of service lives can be guaranteed at least under the rated load in a full-temperature range. With the adoption of the magnetic latching structure, the one-out-three load transfer switch module is low in power consumption and small in size. A connection mode of the J1, J2 and J3 is adopted, and the short circuit of the customer power supply can be avoided at any time.

The invention relates to a method for strengthening insulation of a 10kV overhead line and improving operation reliability, and belongs to the technical field of distribution network maintenance. In order to salve the problems of bird damages and foreign body damages of the overhead line, the method provided by the invention comprises the following steps: treating conducting wires at two sides of a post tower and the conducting wires passing through a leading wire part; bind the conducting wires and an insulator at the top of a straight line pole insulator by adopting aluminum wire, and directly coating the top end of the insulator, a binding wire and leading wire sleeve ends at two sides together by adopting a prefabricated insulating protecting cover with a corresponding model to ensure that electrified parts are not exposed; and for a tension-resistant pole connecting fitting, uniformly winding the lower end of a suspension insulator and a socket clevis by adopting a silicon rubber hot-melt adhesive tape, and then coating end parts of a tension-resistant wire clip and a conducting wire sleeve together by adopting a prefabricated tension-resistant wire clip insulating protection cover with a corresponding model so as to ensure that the electrified parts are not exposed. The method provided by the invention is wide in application range, convenient in construction, strong in operability, obvious in effect and low in cost.

The invention discloses a power transmission line vertically-arranged lead switching-off and grounding connection type and method. The connection type comprises a pair of switching-off points arranged in an upper lead tension direction, wherein the two switching-off points are connected through employing a tension insulator, grounding wires are led out at the switching-off points through tension wire clamp leading boards, the grounding wires naturally sag under the gravity action, and the grounding wires are perpendicularly connected with an upper lead, a middle lead and a lower lead. Electrical connection in one same lead tension direction is switched off through employing the tension insulator, inter-phase insulation is guaranteed through utilizing the inter-phase insulator to directly form grounding of the line switching-off points, and a safe, reliable and flexible grounding mode is realized. The connection type is advantaged in that switching-off and grounding at any position of the vertically-arranged lead can be directly carried out, flexibility and reliability are realized, establishing a tower is not needed, a mounting speed is fast, the power failure time is short, and cost is substantially saved.

The invention relates to a ratio of transformation adjustable type current transformer and a data collecting method thereof. A secondary winding of a first core-through type current transformer comprises a first tap, a tail tap and at least one center tap; a primary winding forms a first ratio of transformation with a winding between the first tap and the tail tap of the second winding, the primary winding forms a second ratio of transformation with a winding between the first tap and the center tap of the second winding, the primary winding forms a third ratio of transformation with a winding between the center tap and the tail tap of the second winding, and so on; the ratio of transformation adjustable type current transformer further comprises a second core-through type current transformer which has the same structure as the first core-through type current transformer. The ratio of transformation adjustable type current transformer has the beneficial effect that the multi-stage ratio of transformation adjusting of the current transformer in the application process is realized, so as to solve the problems of the traditional power distribution automatic system that when the load of the measured circuit exceeds the measurable range of the fixed-ratio of transformation transformer for a long time, the measuring error is larger, and the other new transformer with the matched ratio of transformation needs to be replaced under the extreme condition.

The invention discloses a hot plug type middle-high voltage power distribution prefabricated cabin, which comprises a bus and outgoing line integrated fixed prefabricated cabin and a power distribution unit type movable prefabricated cabin, and is characterized in that the bus and outgoing line integrated fixed prefabricated cabin comprises a high voltage fixed cabin, a middle voltage fixed cabin and an interval inner cabin, a GIL bus, a GIS outlet cable sleeve, a bus and outlet static contact insulating sleeve are arranged in the cabin. The power distribution unit type mobile prefabricated cabin internally comprises GIS power distribution unit equipment, a lead, a bus and an outgoing line moving contact sleeve; hot plugging between the bus and outgoing line integrated fixed prefabricated cabin and the power distribution device unit type mobile prefabricated cabin is realized through a moving contact and a static contact, and the static contacts of the bus and outgoing line integrated fixed prefabricated cabin are compactly arranged in an electrified manner through an insulating sleeve. The invention aims to solve the problems that various devices and materials need to be purchased to be combined and matched from drawings to engineering sites due to the fact that an existing middle-high voltage power distribution device needs to be designed, manufactured, constructed and debugged in various installation stages, construction and installation are time-consuming and labor-consuming, power-off overhaul is difficult, and operation and maintenance are not changed. The design, manufacture, installation, operation and maintenance modes of the current middle and high voltage power distribution device are thoroughly changed, and the device has the advantages of compact structure, small occupied area, convenience in design, construction, operation and maintenance, short power failure time, basically no on-site electrical operation and the like.

The invention relates to the technical field of electric power and tools, and particularly relates to a device for manufacturing a knife switch static contact. The device is characterized by comprising two opposite brackets, a base (43), two support plates (44), four fifth fixing elements (45) and two support connecting plates (46). The invention also discloses a manufacturing method of the knifeswitch static contact. The device mainly has the following beneficial technical effects: the structure is simple, the component parts are easy to manufacture and easy to replace, the assembly time isshort, the maintenance is easy, the power outage time of the busbar is short and the output power quantity is higher; and the manufacturing method is simple and easy to master.

The invention discloses an improved method of a transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure. The improved method includes the steps: A, recovering gas; B, demounting a GIS bus drum and a support thereof; C, demounting an oil-gas sleeve and connecting equipment thereof; D, demounting an arrester base support; E, mounting a transformer air sleeve; F, mounting the an arrester base support and a GIS sleeve supporting seat; and G, mounting a tubular bus. The improved method is low in implementation difficulty, safe and reliable in operation, short in construction period and low in economic loss, and a transformer is kept in integral operation.

A method for relocating power pipelines intruding into a subway station structure. The steps include: avoiding the pipeline during main body construction; using the main body to suspend the pipeline after foundation pit excavation; changing from suspension to support during construction of the main structure, and then to suspension ; Construction and relocation of pipe trenches; relocation of pipelines. During the construction of the station, the position of the power pipeline group was only changed once, and the construction of the main structure of the station was completed without changing the route in the early stage. , and clever use of the support of the middle plate of the structure, it is suitable for the construction of multi-storey underground pipe corridors or transportation facilities.

The invention discloses a connection structure and method for single-side Pi connection of multi-circuit overhead transmission lines on the same tower. The connection structure for single-side Pi connection of multi-circuit overhead transmission lines on the same tower comprises a Pi-connected overhead line and a newly-built overhead line; the Pi-connected overhead line comprises an angle tower, a first lead group, a second lead group and a first jumper wire; the first wire group comprises a first wire and a second wire, and the second wire group comprises a third wire and a fourth wire; the newly-built overhead line comprises a terminal tower, a third wire group, a second jumper wire and a third jumper wire, the third wire group comprises a fifth wire and a sixth wire; the terminal tower and the angle tower are arranged in a spaced mode in the preset horizontal direction, the first wire and the fifth wire are electrically connected through the second jumper wire, and the second wire and the sixth wire are electrically connected through the third jumper wire. The connection structure for single-side Pi connection of the same-tower multi-circuit overhead transmission line has the advantages of low construction cost, short power failure time and the like.

The invention discloses a self-adaptive load control method and system based on transformer working condition real-time monitoring. According to the method and system, a user with a lower importance level is cut off when a load needs to be cut off according to the load condition of a transformer monitored in real time, the power supply of a user with a higher importance level is guaranteed; when the load of the transformer is reduced to a certain degree, and the power supply of the user can be recovered according to the importance level of the user, so that the user with the high importance level can be uninterruptible, and the user with the low importance level can be shortest in power failure time. The method and system do not need to depend on pre-estimated load to limit the power of the users in advance. In the prior art, a load increase condition cannot be accurately predicted in an existing load control method for limiting the power of users in advance by adopting pre-estimated load, as a result, the power failure time is too long, the user experience is reduced, and the power supply cannot be recovered timely when the power consumption peak passes. With the method and system adopted, the above problems can be solved.