231results about How to "Improve power supply security" patented technology

The invention discloses bridge equipment comprising a matrix arranged above a base and an upper frame arranged above the matrix, wherein a fourth driver is arranged at the bottom in the base, the top of the fourth driver is connected with a rotary column, an extension end at the top of the rotary column penetrates through the inner wall of the base and is fixedly connected with an end face of the bottom of the matrix, a bearing is fixedly arranged between the matrix and the base, an accommodation cavity is formed in the matrix, a first hollow groove and a second hollow groove are formed in the matrix at the top of the accommodation cavity, a chute is formed in a top wall in the first hollow groove, a fetching groove is formed in an outer wall of the matrix on the right side of the accommodation cavity, a through groove and a clamping groove are formed between the fetching groove and the accommodation cavity, a rotating shaft arranged to extend up and down is arranged in the accommodation cavity, an extension segment at the top of the rotating shaft penetrates through the inner wall of the matrix and stretches into the first hollow groove, a first toothed wheel is fixedly arranged at the tail of the rotating shaft in the first hollow groove, a reel is fixedly arranged on the rotating shaft in the accommodation cavity, conducting wires are wound on the reel, a slide block is arranged in the chute, the bottom of the slide block stretches into the first hollow groove, and a first driver is arranged in the end face at the bottom of the slide block. The bridge equipment disclosed by the invention has the advantages of simple structure, convenient operation, capability of realizing automatic take-up and high safety.

The invention discloses an information device, which comprises a base body and a connection part arranged at the left side of the base body. The base body is provided therein with an empty groove. The upper side and the lower side of the empty groove are both provided with a first sliding groove. Each sliding groove is provided with a stud bolt. The left side end of the stud bolt is connected with a motor. The right side inner wall of the empty groove is provided with a first groove part; the left side inner wall of the empty groove is provided with an electrical connection rod. The empty groove is provided therein with a push-and-pull block whose upper side and the lower side probe into the first sliding grooves at the upper side and the lower side of the empty groove and which cooperates and is flexibly connected with the empty groove. The push-and-pull block inside the first sliding grooves is in threaded connection and cooperation with the stud bolt. The left side end face of the push-and-pull block is provided with a first electrical connection hole arranged corresponding to the first electrical rod; and between the left side end face of the push-and-pull block and the first sliding grooves are provided with electrical connection wires. The wall body at the left side of the base body is provided therein with an insertion and combination groove. The right side inner wall of the insertion and combination groove is provided with a second electrical connection rod. The information device of the invention has a simple structure, is convenient to operate, and achieves high security and connection fastening performance.

The invention discloses a ground fault current compensation system and method for a self-produced power supply phase power supply. The system comprises a phase power supply generator, a phase power supply phase compensator, a fling-cut switch, a controller and a voltage transformation device. An output end of a phase compensator of a power supply is connected to a system neutral point through thefling-cut switch. The system can passively generate power distribution network power supply phase power supply and harmonic phase power supply and input anti-phase power supply phase power supply andthe harmonic phase power supply into the system according to fault logic. The complete compensation of power distribution network grounding fault reactive current, harmonic current and active currentis achieved, the defect that compensation is incomplete by adopting a power electronic device inversion injection method after electricity is taken from a bus system is overcome, and the problems thatan active inversion method has a poor metallic grounding compensation effect and a traditional arc suppression coil cannot achieve full compensation are solved. The system is efficient and accurate and can completely compensate overvoltage and overcurrent generated by a grounding fault, the safety of a power grid and equipment is guaranteed, and the risk of electric shock of a human body is completely avoided.

The invention discloses a safe operation method of active voltage reduction for a ground fault phase of a non-effective grounding system, and the safe operation method is applied to the ground fault safe operation of a neutral point non-effective grounding generator or power distribution network. When a single-phase ground fault occurs, an adjustable current source is applied additionally between a bus at a non-effective grounding system side and the ground, or between a circuit and the ground, or between a neutral point and the ground, or between a shunting tap at a transformer non-effective grounding system side winding and the ground, to adjust the injected current magnitude and phase and further reduce the fault phase voltage, so that the fault point voltage is lower than the ground arc continuous combustion voltage to meet the long-term non-stop safe operation requirement. According to the invention, the fault phase voltage is reduced to a non-zero safe operation value, so the permanent single-phase earth fault current is suppressed, the rising amplitude of the non-fault phase voltage is limited, the risk of non-fault phase insulation breakdown is reduced, the personal safety and equipment security risks are reduced, the occurrence of power outages is effectively prevented, and power supply reliability and security are greatly improved.

The invention discloses a grounding fault current compensation system and method for a self-generated power supply phase power supply. The grounding fault current compensation system comprises a phasepower supply converter, a fling-cut switch, a voltage transformation device and a controller, wherein the input end of the phase power supply converter is connected with a bus, the output end of thephase power supply converter is connected with the input end of the fling-cut switch, the voltage transformation device is connected between the phase power supply converter and a system neutral pointin series, the controller is connected with a voltage transformer of the bus, and the output end of the controller is connected with the input end of the fling-cut switch. The system can passively generate a power distribution network power supply phase power supply and a harmonic phase power supply, and the reversed-phase power supply phase power supply and the harmonic phase power supply are put into the system according to fault logic, so that complete compensation of reactive current and harmonic current of the grounding fault of the power distribution network is achieved, the defect thatthe compensation is incomplete by adopting a power electronic device inversion injection method after electricity is taken from a bus system is overcome, and the problems that an active inversion method is poor in metallic grounding compensation effect and a traditional arc suppression coil cannot achieve full compensation are solved.

The invention discloses a distribution network reconfiguration method, which comprises the following steps: building a distribution network load optimization model; and optimizing the distribution network load optimization model on the basis of a genetic algorithm, and obtaining a distribution network reconfiguration scheme. The reconfiguration is carried out on a distribution network on the basis of a genetic method; and load reconfiguration is carried out by changing the state of a switch, so that line loss of the distribution network is reduced; the benefits are improved; and the power supply reliability and safety are improved.

The invention discloses an air purification device which comprises an air purifier, a joint part connected with an electrical connection seat purifier by an electrical connection wire, and an electrical connection seat arranged on the front end face of a machine body. A control region is arranged at the center of the front end face of the purifier; an atomization opening is formed on the front end face of the purifier above the control region; an external screwing part is arranged on the front end face of the electrical connection seat; a through hole is formed in the external screwing part; an insertion slot is formed in the electrical connection seat at the rear side of the through hole; a second insertion needle is arranged on the inner wall of the rear side of the insertion slot; a first empty slot is formed in the electrical connection seat behind the insertion slot; a hole slot is formed on the inner wall of the rear side of the first empty slot; a pushing block is arranged in the first empty slot at the front side of the hole slot; a pushing spring plate is arranged between the end face of the rear side of the pushing block and the hole slot; guide feeding rods are correspondingly arranged in the first empty slot at both sides of the pushing spring plate; the guide feeding rods are movably matched and connected with the pushing block; a pressed-against rod which passes through an inner wall body of the electrical connection seat and extends into the insertion slot is arranged at the front end side of the pushing block; concave parts are formed in the left and right side end walls of the pushing block; a spline rotating shaft is correspondingly arranged in the first empty slot outside the pushing block; the rear side end of the spline rotating shaft is connected with a motor. The air purification device disclosed by the invention is simple in structure, convenient to operate, high in purification capacity and stable in power supply connection, and has an electric shock protection function; an electric shock accident is prevented; safety and stability of power supply are improved.

The invention provides a line loss calculation method based on multi-source data fusion, and the method comprises the following steps: 1) information synchronization: collecting data information comprising a power grid account, topological information and operation data, converting and storing the data information in a database, and obtaining multi-source data; 2) multi-source data fusion: performing data processing and data fusion on the obtained multi-source data to obtain power grid line loss related characteristic data; 3) power grid line loss calculation; and 4) element loss calculating.According to the method, the calculation process of information synchronization, data fusion, feature extraction and line loss calculation is realized, the electric energy loss of various elements ofthe power grid is accurately obtained, and the energy-saving and loss-reducing effects of power distribution network frame optimization, compensation equipment selection and matching, distribution transformer economic operation and the like are accurately evaluated and verified.

A method for selecting power exchange connection modes for sub-areas in a power grid comprises steps as follows: A, power grid parameters of a fault sub-area and an adjacent sub-area are acquired; B, power vacancy of the fault sub-area is determined; C, exchange power of all connecting lines in the fault sub-area is determined; D, whether a main transformer down channel of the fault sub-area is broken down is judged, if yes, one connecting line with the highest exchange power is closed to be taken as an exchange connecting channel, and otherwise, a buscouple switch is switched off to be taken as the exchange connecting channel; E, whether the power vacancy of the fault sub-area is met is judged, if yes, a step F is executed, and otherwise, a step G is executed; F, whether the exchange connecting channel is overloaded is judged, if yes, the step G is executed, and otherwise, the connecting way is selected; G, one connecting line is added as the exchange connecting channel, and the step E is executed. According to the method for selecting the power exchange connection modes for the sub-areas in the power grid, the effective power grid sub-area exchange ways can be provided, and the system stability is improved.

The invention discloses an environment-friendly dust collection device. The environment-friendly dust collection device comprises a column body, and a transverse plate and a plug which are fixedly arranged at the left upper part of the column body, wherein a plugging groove is formed in the column body below the transverse plate; the plugging groove is internally provided with a first plugging spring; a first sliding groove is formed in the bottom end face of the right side of the transverse plate; the first sliding groove is internally provided with a locking part; the first sliding groove is internally provided with a first screw rod which is connected with the locking part in screw-thread fit and extends towards the left side and the right side; the column body on the right side of the transverse plate is internally provided with a first sliding cavity; a through hole is formed between the first sliding cavity and the first sliding groove; a first accommodating groove is internally formed in the column body above the through hole; the transverse plate above the right side of the first sliding groove is internally provided with a second groove body; a second sliding groove passing through the top wall of the transverse plate is formed in the transverse plate above the second groove body; a push rod arranged corresponding to the left side end of the through hole is arranged on the right side end face of the locking part; and the first sliding cavity is internally connected with a sliding block in sliding fit. The environment-friendly dust collection device is simple in structure, convenient to plug and automatic for locking and plugging, and also has an intelligent prompting function.

Provided is an anti-misoperation power distribution cabinet device, used for distributing electric power from a power supply to electrical loads. The power distribution cabinet includes a fixed cabinet body (9) used for installing power distribution devices, and a pivotal door (99) which can be pivotally mounted to the fixed cabinet body (9) through the rotation cooperation between a pivotal axis (91) and a bearing component (92) fixed on the fixed cabinet body (9). The pivotal door (99) is provided with an electric device, and is in fixed connection with the pivotal axis (91); the upper end of the pivotal axis (91) is fixedly provided with a cylindrical cap (93) located above the bearing component (92) and performing axial location by means of the bearing component (92).

The invention provides a power supply method and device of a USB interface and an antenna router device. The method includes the steps of increasing the value of currents flowing through a controllable load when equipment is connected with the USB interface, wherein the controllable load is connected with the USB interface and used for adjusting the value of the currents flowing through the USB interface; using the current value of the currents flowing through the controllable load as the on-load capacity of the USB interface when it is detected the value of voltages of the USB interface is smaller than the lower limit of power supply voltages of the system in the increasing process of the value of the currents; judging whether the on-load capacity of the USB interface is larger than the minimum current value required in the normal work of the equipment or not; determining the work power of the equipment when the judgment result is yes. Through the method and device, the problem that abnormal shutdown or reboot is caused by the difference of load characteristics between wireless router devices of different specifications in the prior art is solved.

The invention discloses bridge equipment. The bridge equipment comprises a shell and a port part arranged on maintenance equipment, wherein an accommodating cavity is formed in the shell; a placement groove is formed in the outer side end plane of the shell on the right side of the accommodating cavity; a connecting hole is formed between the placement groove and the accommodating cavity; a first sliding groove, the top of which is connected with the accommodating cavity, is formed in the inner bottom wall on the right side of the accommodating cavity; a second sliding groove is formed in the center of the first sliding groove in a run-through manner, and the second sliding groove is connected with the first sliding groove; a rotary shaft is arranged in the accommodating cavity; the top of the rotary shaft is connected with a first driver in a matching manner; a reel is fixedly arranged on the rotary shaft; the reel is wound with a cable; a power-on end is arranged in the placement groove; an inserting column, connected with the connecting hole in a matching manner, is arranged on the left side end plane of the power-on end; the left side end plane of the inserting column is fixedly connected with the cable; a jointing block is arranged in the power-on end; and a bump is arranged on the right side end plane of the jointing block. The bridge equipment is simple in structure, convenient to operate, stable and firm in connection, and high in safety.

A power distribution cabinet device convenient to operate is used for distributing electric power from a power supply to an electricity load. The power distribution cabinet device comprises a fixed cabinet body (9) for installing a power distribution device and a pivot door (99) which is installed on the fixed cabinet body (9) in a pivoted mode through the running fit between a pivot shaft (91) and a bearing part (92) fixedly arranged on the fixed cabinet body (9). A power utilization device is installed on the pivot door (99), the pivot door (99) is fixedly connected with the pivot shaft (91), and a cylindrical cap body (93) which is located on the upper portion of the bearing part (92) and axially positioned by means of the bearing part (92) is fixedly arranged at the upper end of the pivot shaft (91).

The invention discloses an LED street lamp device. The LED street lamp device comprises a lamp pole, a machine body, a support fixedly arranged above the left portion of the machine body and a lamp cap. A base is fixedly arranged at the bottom of the lamp pole. Straight rods are arranged above the left side of the lamp pole. The ends, deviating from the lamp pole, of the straight rods and the right side end face of the machine body are fixedly connected. An inserting groove is formed in the position, below the support, in the machine body. First plugs are arranged in the inserting groove. A first sliding groove is formed in the bottom end face of the right side of the support. A locking part is arranged in the first sliding groove. A first spiral rod which is in thread fit connection with the locking part and stretches towards the left side and the right side is arranged in the first sliding groove. A first sliding cavity is formed in the position, on the right side of the support, in the machine body. A communicating groove is formed between the first sliding cavity and the first sliding groove. A first empty bin is arranged at the position, above the communicating groove, in the machine body. A second containing cavity is formed in the position, above the right side of the first sliding groove, in the support. A second sliding groove penetrating the top wall of the support is formed in the position, above the second containing cavity, in the support. A pushing rod corresponding to the left side end of the communicating groove is arranged on the right side end face of the locking part. A sliding block is connected in the first sliding cavity in a sliding and matched manner. The LED street lamp device is simple in structure, automatic locking and mounting are achieved, and meanwhile the lightning protection function is achieved.

The invention discloses a simulation aircraft and a system thereof. The simulation aircraft comprises a support, a first rotation shaft is horizontally arranged on the support, a transmission case is fixedly connected at one end of the first rotation shaft extending out of the support, and one side of the transmission case is connected with a cockpit. The first rotation shaft is provided with a hollow cavity, a second rotation shat is arranged in the cavity, the second rotation shaft and the first rotation shaft are coaxially arranged, one end of the second rotation shaft extending into the transmission case is in linkage with a fourth rotation shaft through a linkage mechanism, the fourth rotation shaft is perpendicular to the first rotation shat in horizontal projection, and the cockpit is hinged to an end portion of the fourth rotation shaft extending out of the transmission case through a hinge pin. The second rotation shaft is creatively arranged in the first rotation shaft, so the whole simulation aircraft is simple in structure, small in space occupation, complete in functions, low in manufacturing cost and convenient to mount.

The invention discloses a grounding fault current compensation system and method for a self-produced power supply phase power supply. The system comprises a phase supply power converter, an on-off switch, a voltage regulator and a controller. The input end of the phase power supply converter is connected with a bus, and the output end is connected with the input end of the on-off switch. The common connection point of the on-off switch and the system neutral point are connected on the non-homonymous ends on the two sides of the voltage regulator, and the remaining connection points of the voltage regulator are grounded. The controller is connected with the voltage transformer of the bus. The output end of the controller is connected with the input end of the on-off switch and the voltage regulator. The system can passively generate the power supply phase power supply and the harmonic phase power supply of a distribution network and put the reverse phase power supply and the harmonic phase power supply into the system according to the fault logic so as to realize complete compensation of reactive current, harmonic current and active current of the distribution network grounding fault and solve the problems of poor metal grounding compensation effect of the active inverter method and inability of complete compensation of the traditional arc suppression coil.

The invention discloses a distribution network reactive voltage control method taking distributed generation optimal configuration into consideration and relates to the technical field of operation and control of power distribution systems to which distributed generations access. The method comprises steps of firstly calculating the optimal access capacity and the optical power factor value of each bus accessing to a distributed generation (DG); performing optimal configuration of an intermittent DG; and performing voltage comprehensive control of a configured distribution network, wherein firstly the reactive compensation capacity for reaching target voltage is determined, and according to values of reactive compensation capacities QiC determined under different conditions, the voltage control process that inverter power factor adjustment is performed firstly, reactive compensation device adjustment serves as supplement and main transformer tap position adjustment serves as final guarantee is performed. According to the invention, the inverter power factor adjustment is fully utilized to adjust distribution network node voltage, being reliable and economic, and active output of the distributed generation and economic benefits of users are free of influences.

Disclosed is a ship shore power connection method. The ship shore power connection method comprises the following steps of inquiring whether there is ship information input with a shore power connection requirement or not, and if so, executing the following steps; judging whether the ship is equipped with a shipboard transformer for high-voltage boarding or not according to transformer informationon the ship, if so, selecting high-voltage shore power connection, and if not, selecting low-voltage shore power connection; if the low-voltage shore power connection is selected, judging whether theship power distribution standard is consistent to shore power electrical standard or not according to the ship power distribution information, if so, selecting equal-voltage and equal-frequency powersupply, and if not, selecting variable-voltage and variable-frequency power supply; and judging whether the ship has a seamless shore power connection interface or not according to the ship seamlessshore power connection interface information, if so, selecting seamless shore power connection, and if not, selecting shore power connection in a power down manner. By virtue of the method, which modeof the ship is adopted for shore power connection can be accurately judged according to whether the ship is equipped with the shipboard transformer or not, whether the ship is equipped with the selecting seamless shore power connection interface or not, and the ship power distribution standard ship information, thereby greatly improving ship shore power connection efficiency.

The invention discloses a warehouse power supply protection system applied to the field of rail traffic. An interlocking circuit is arranged on a three-phase power utilization line and is used for aninput normally-open contact of a warehouse contactor and a normally-closed contact of a coil of the warehouse contactor and an auxiliary transformation contactor which are connected in series, a coilof the auxiliary transformation contactor is arranged in an auxiliary inverter, a normally-open contact of the auxiliary transformation contactor is arranged on a three-phase bus, whether the auxiliary inverter can be connected to the three-phase bus and the three-phase power utilization circuit or not can be controlled by the coil of the warehouse contactor and the input normally-open contact, the coil of the auxiliary transformation contactor obtains power by combining the interlocking circuit during external power supply, the normally-closed contact of the auxiliary transformation transformer is disconnected, the input normally-open contact of the warehouse contactor is enabled not to be closed, only one power supply mode is ensured at the same time, and the situation that various powersupplies are used for simultaneously supplying power is enabled to be prevented.

The invention provides a power grid risk calculation method based on multi-source data fusion. The method comprises the following steps: multi-source information data fusion: fusing machine account data, user data, operation data, geographic information, risk influence factors and other data of each business system of a power grid to obtain a complete power grid model comprising fused multi-sourceinformation data; setting an anticipated accident set; analyzing power loss; carrying out load flow calculation; and risk calculation: calculating a transformer area risk and a feeder line risk according to the obtained fault analysis data. According to the power grid risk calculation method based on multi-source data fusion, the calculation processes of data fusion, accident anticipation, load flow calculation and risk calculation are achieved, the power grid risk level is accurately evaluated, weak links are found out and improved, and therefore the power supply safety of the power grid isimproved.

The invention discloses monitoring equipment and monitoring system for an electrical distribution facility. The equipment comprises a signal acquisition device, a processor and a controller, wherein the signal acquisition device is provided with an analog signal interface and/or a digital signal interface and is used for being connected with a temperature sensor and/or a temperature sensor circuit; the signal acquisition device is used for acquiring and outputting a temperature parameter output by the temperature sensor and/or the temperature sensor circuit; the processor is connected with the signal acquisition device; the processor is used for outputting an execution parameter according to the temperature parameter output by the signal acquisition device; the controller is connected with the processor; the controller is used for being connected with temperature control equipment and transmitting a control signal corresponding to the execution parameter to the temperature control equipment according to the execution parameter output by the processor. The monitoring equipment and the monitoring system for the electrical distribution facility solve the technical problem that a manual patrolling mode is difficult to timely respond to variation of an operation temperature of the equipment in the electrical distribution facility.

The utility model relates to a power supply voltage sag protector of super capacitor energy storage and a control method thereof, belonging to the technical field of voltage sag protection. The protector comprises a mains supply voltage amplitude detection circuit, a mains supply voltage current phase detection circuit, a DC bus voltage detection circuit, a DC bus current detection circuit, a super capacitor voltage detection circuit, a load voltage detection circuit, a load voltage and current phase detection circuit, a super capacitor charging and discharging circuit, a power supply switching module, a super capacitor group and a balanced voltage circuit, a SCM (single chip microcomputer) control unit, a rectifier circuit, and a DC step-down circuit. The control method comprises a step of setting the cut back time length of a power supply switching module, a step of inputting load two-end current phase and grid voltage phase into the SCM control unit, a step of monitoring whether a mains supply grid has voltage sag or not, judging the voltage current phase at that time if so, and switching the mains supply grid power supply to super capacitor group power supply, and a step of switching the super capacitor group power supply into the mains supply grid power supply when the grid voltage is restored to be normal.

The invention discloses a novel air purifying device. The air purifying device comprises a purifier, a bolt part and a socket; a control area is arranged in the center of the front end surface of the purifier; an atomization port is formed in the front end surface of the purifier above the control area; a cavity is formed in the socket; first slide grooves are respectively formed in the upper and lower two sides of the cavity; screw rods are respectively arranged in each of the first slide grooves; the left side ends of the screw rods are connected with an electric rotating machine; first hole grooves are formed in the right side inner wall of the cavity; first electric connecting rods are arranged on the left side inner wall of the cavity; slide blocks respectively inserted in the first slide grooves on the upper and lower two sides by the upper and lower two sides and slidably connected and matched with the first slide grooves are arranged in the cavity; the slide blocks in the first slide grooves are in threaded matching and connection with the screw rods; first electric connecting holes corresponding to the first electric connecting rods are formed in the left side end surfaces of the slide blocks; leads are arranged between the left side end surfaces of the slide blocks and the first hole grooves; insertion grooves are formed in a wall body on the left side of the socket; and second electric connecting rods are arranged on the right side inner walls of the insertion grooves. The air purifying device is simple in structure, convenient to operate, excellent in purifying effect and high in safety and connecting tightness.