89results about How to "Does not affect power supply" patented technology

The invention discloses a non-destructive identification method for a material of an integral coil of a distribution transformer. The non-destructive identification method based on the difference of attenuation coefficients of copper, steel and aluminum to X rays includes photographing the distribution transformer in a integral state by the X rays; measuring blackness of photographed negative films of the rays by a black and white densitometer; inputting measured blackness values into a computer; and computing X-ray attenuation coefficient and transillumination thickness curves, which are stored in the computer, of the copper, the steel and the aluminum corresponding to different X-ray tubes and comparing the X-ray attenuation coefficient and transillumination thickness curves with a characteristic curve of the industrial ray films, and judging whether the winding coil of the distribution transformer is made of the aluminum or the copper.

A kind of car-carried mathanol catalytic cracking device fuel pipe auto-control system automatically controls the second air jet-in device, pre-heat device, oil pump, spray nozzle and electro magnetic valve according to the signal inputted by temperature sensor, pressure sensor and air flowmeter through ECU. Thus, the gas with rich hydrogen from said cracking device is mixed with fuel to inject into the engine as different ratio in different condition and rotate speed, to reduce tail-gas displacement.

The invention discloses a fault recording data fusion system based on multiple substations. The system comprises a hardware portion and a software portion. The hardware portion comprises an acquisition server, a recording file storage device, a data server, a master station database and a WEB publishing server. The software portion comprises a storage module and a data processing module. According to the fault recording data fusion system based on the multiple substations, through arrangement of the acquisition server, recorded fault information of each fault wave recording device can be collected effectively; through arrangement of the recording file storage device, an effect of temporary storage of the recorded fault information can be realized; through arrangement of the data server, the recorded fault information can be processed effectively to judge relevance between the recorded fault information, and finally, a failure analysis report can be obtained and stored in the master station database; and the information is issued to the WEB publishing server to inform work personnel of faults.

The invention provides a site test method for feeder automation. The method comprises the following steps that definite value information about protection of an exit in a distribution network line is obtained first; the state of the line is divided into a plurality of cross section states in different sequences according to the feeder automation process, and information in the cross section states is set automatically according to the definite value information and a network topology state; the information of the cross section states is issued to test equipment according to the sequences; the test equipment controls output of electrical data automatically according to received information, and then testing is realized.

The invention discloses a power frequency online anti-icing and de-icing method for a power transmission line, which comprises the steps which are as follows: three sets of dynamic reactive power compensation devices are connected with a power transmission line between a left side electric power substation and a right electric power substation which are adjacent; a temperature sensor is arranged on the power transmission line; when the temperature detected by the temperature sensor is lower than 0 DEG C, a controller controls the three sets of dynamic reactive power compensation devices into an anti-icing and de-icing working state; the reactive power compensation device at the left side generates a capacitive reactive current; the dynamic reactive power compensation device at the right side generates a capacitive reactive current; and the dynamic reactive power compensation device in the middle generates an inductive reactive current. The power frequency online anti-icing and de-icing method for the power transmission line can automatically implement anti-icing and de-icing under the conditions that the line is not stopped and the power supply is not influenced, guarantees the line from icing, guarantees the stability and safety of a power supply system under extreme disaster weather conditions such as freezing rain, ice and snow, and improves the running economical efficiency of the power system.

The invention relates to a UPS (uninterrupted power supply) device with low power consumption, which comprises an energy storage unit, an AC-DC conversion circuit, a charging circuit, a selective circuit, a main detecting circuit, a main control circuit and a minor control circuit. As the running of the UPS device is controlled by the main control circuit or the minor control circuit, the UPS device can start and stop the running of the man control circuit or the minor control circuit in good time according to running information (for example, output current) of the UPS device so as to increase the overall efficiency of the UPS device and prolong the power supplying time; moreover, the UPS device can also stop a relatively high-drain controller in good time without affecting the running and power supplying of the UPS device.

The invention discloses a 10kV distribution network line anti-thunder protection device allowing electrified replacement. The 10kV distribution network line anti-thunder protection device allowing the electrified replacement comprises a guiding supporting plate which is connected with an insulator steel pin, an electrified separator which is connected with the guiding supporting plate, an adjusting plate which is connected with the electrified separator and an anti-thunder protector which is connected with the adjusting plate. The 10kV distribution network line anti-thunder protection device allowing the electrified replacement is formed by the guiding supporting plate, the electrified separator, the adjusting plate and the anti-thunder protector, the electrified separator is pulled to be opened to enable the anti-thunder protector and the guiding supporting plate to be separated, then the anti-thunder protector and the high-voltage insulator steel pin are separated, and electrified maintenance and replacement of the anti-thunder protector is convenient.

The invention discloses an electronic management method and system of a battery. The method comprises the following steps of acquiring a voltage stage of a single battery; determining to execute at least one of the following operation: stimulation operation, optimization operation and balancing operation on the single battery according to the acquired voltage state of the single battery; and outputting a pulse width modulation (PWM) signal to the single battery according to the determined operation. By the method, PCS control and BMS control are combined, so that PCS power partial control and battery system control and application can be effectively combined and coordinated, moreover, the cost can be reduced, the expansibility can be improved, a battery electronic module is easy to connect in series/parallel, and hot plug is facilitated.

The invention discloses a voltage transformer on-line state monitoring and fault diagnosing method and relates to a voltage transformer state monitoring and fault diagnosing method. The method comprises the following steps: voltage transformer winding parameters are calculated via a microprocessor based on first to fourth high frequency discrete signals which are collected synchronously and a voltage transformer winding parameter calculating formula, the calculated voltage transformer winding parameters are output to a storage device, the detection result of all parameters is displayed on different display devices, and a voltage transformer state can be determined by workers and fault diagnosis can be realized according to obtained numeric values of the voltage transformer winding parameters and a fitting curve thereof. According to the voltage transformer on-line state monitoring and fault diagnosing method, actually measured electrical parameters are used for calculating resistance and reactance parameters of a voltage transformer winding in real time, and the method is based on a simple principle and can be realized conveniently.

The invention relates to the technical field of energy systems, and discloses a distributive battery pack power supplying system. The distributive battery pack power supplying system comprises N firstpower batteries are connected to a first high-voltage box; N driving controllers corresponding to the high-voltage box are powered by the first high-voltage box; N second power batteries are connected to a second high-voltage box, and N driving controller corresponding to the second high-voltage box are powered by the second high-voltage box; the N first power batteries are in one-to-one-correspondence to the N driving controllers, and the N first power batteries separately directly power the corresponding driving controllers; he N second power batteries are in one-to-one-correspondence to the N driving controllers, and the N second power batteries separately directly power the corresponding driving controllers; the N first power batteries and the N second power batteries are connected toa CAN bus through a battery management system; and the driving controllers are connected to the CAN bus. By adopting the power supplying arrangement mode, reliability of the power supplying system inan energy car is improved; repairing is convenient and flexible; and the space utilization rate is great.

The invention relates to an outdoor high-voltage electrified installation and removal electric energy metering device which comprises a current transformer, a voltage transformer and an electric energy meter box, wherein the current transformer is mounted on a high-voltage phase line, a high-voltage one-phase line penetrates through the middle hole of an iron core of the current transformer, and an outlet wire of a secondary winding of the current transformer is connected with an electric energy meter; the voltage transformer is mounted in the electric energy meter box or on an electric pole, the two outlet wire ends of a primary winding of the voltage transformer are connected with high-voltage two-phase lines, and the two outlet wire ends of the secondary winding of the voltage transformer are connected with the electric energy meter; and an electric energy meter box body is mounted on the electric pole or a transformer trestle, and the three-phase electric energy meter is mounted in the electric energy meter box. By applying the outdoor high-voltage 10kV electrified installation and removal electric energy metering device, the problem of frequent power failure caused by installation and removal of the electric energy metering device for checking can be avoided, when the electric energy metering device is installed or removed, the operation can be performed in an electrified manner without affecting the power supply for users, and the application of the outdoor high-voltage electrified installation and removal electric energy metering device can be used for improving the reliability in power supply and increasing the enterprise and social benefits.

The invention discloses a current sharing control system and method. The system and method are used for controlling output currents of at least two sets of power sources which are connected in parallel. The current sharing control system comprises multiple sampling modules, multiple controllers and a processor, wherein each sampling module is connected with the corresponding power source and samples the corresponding power source to obtain the current output current, each controller is connected with the corresponding power source so as to control the output current of the corresponding power source, and the processor is connected with the sampling modules and the controllers and sends control signals to the controllers according to the remaining capacity of each power source so that the output currents of all the power sources can be controlled through the controllers, and therefore the output currents of all the power sources are in direct proportion to the remaining capacities. In this way, the output currents of the parallel power sources can be adjusted in real time, the remaining capacities of all the power sources can be zero at the same time, when some power sources are damaged, the power supply of other power sources can not be affected, the stability of a power supply system with the parallel power sources can be improved, and the service life of the power supply system with the parallel power sources can be prolonged.

The invention provides a replacement tool for an arc-shaped damper. The replacement tool for the arc-shaped damper comprises a body and a fixed column. The fixed column is located on the body. Lug supports are arranged at the two ends of the fixed column. The lug supports are located on the body. Due to the facts that the fixed column is embedded into a hole of the arc-shaped damper, and the lug supports on the left side and the right side of the fixed column are inserted into holes of the arc-shaped damper, the replacement tool is more tightly buckled with the arc-shaped damper, the arc-shaped damper is conveniently pulled out and assembled, and the aim of replacing the arc-shaped damper under the electrification state is achieved. The replacement tool for the arc-shaped damper is simple in structure and safe and convenient to use, working efficiency is improved, the arc-shaped damper can be rapidly and safely replaced under the electrification state, and continuous supplying of electric power is ensured.

The invention discloses a branch wire clamp capable of being separated quickly, which comprises a wire clamp unit, the wire clamp unit comprises a support and a sliding frame connected with the support, the support comprises a connecting piece, a first snap ring connected with one end of the connecting piece and a fixed seat connected with the other end of the connecting piece, and a through holeis formed in the fixed seat; a separation unit which comprises a sliding rod located in the through hole and an annular piece connected with the sliding rod, wherein the sliding rod penetrates throughthe through hole; and a telescopic unit which comprises a rotating piece rotationally connected with the sliding frame and a stud connected to one end of the rotating piece, wherein a screw hole is formed in one end of the sliding rod, and the stud is connected with the screw hole. When power-off operation is needed, the branch wire clamp can be rapidly loosened, the separation effect is achieved, the arranged telescopic unit can be adjusted according to the thickness of a wire, and the device can be connected more firmly.

The invention provides a single-arm type bird repellent shielding cover applied to a high-voltage overhead line pole, and the single-arm type bird repellent shielding cover belongs to the field of line protection. The single-arm type bird repellent shielding cover is provided with a T-shaped middle shielding cover is arranged at a joint part of a lead wire and an insulator string; two opening endsalong the direction of the lead wire of the T-shaped middle shielding cover are provided with a left gun head cover and a right gun head cover separately; and the T-shaped middle shielding cover is integrally fixed/connected between the left gun head cover and the right gun head cover in an inserting or riveting manner. Through arranging the defensive shielding protection cover at the joint partof the overhead power transmission line conductor and the horizontal insulator string, a metal bowl at the tail end of an insulating arm and the bared conductor part are insulated and shielded, insulating extension at a specified length is performed along the direction of an overhead line, an electrical insulation distance between a bird nest and a power supply overhead line is increased, and effective isolation between the bird nest and an electric conductor is generated, so as to avoid a grounding failure of a high-voltage power supply line caused by bird nesting. The single-arm type bird repellent shielding cover applied to the high-voltage overhead line pole can be widely applied to the protection field of various kinds of high-voltage overhead power transmission lines adopting transverse insulator strings.

The invention provides an intelligent anti-icing deicing system and method for a high-voltage transmission line. The intelligent anti-icing deicing system comprises an alternating-current up-conversion module, an alternating-current down-converting module, an ice coating detection device, a frequency measurement meter, an up-conversion control module and an alternating-current down-conversion control module, wherein the alternating-current up-conversion module is arranged at the front end of an ice-coated circuit, the alternating-current down-converting module us arranged at the back end of ice-coated circuit, the ice coating detection device is arranged on the ice-coated circuit, the frequency measurement meter is arranged at the output end of the down-conversion module, the up-conversion control module is used for receiving a signal sent by the ice coating detection device and controlling the up-conversion module, and the alternating-current down-conversion control module is used for receiving a signal sent by the frequency measurement meter and controlling the alternating-current down-conversion module. In the invention, alternating-direct current is converted into high-frequency alternating current by utilizing the skin effect, so that the ice-coated circuit generates more heat; anti-icing and deicing is carried out through the heat generated by the ice-coated circuit;and deicing frequency is selected in intelligent grade according to change of meteorological conditions, without affecting power transmission and supply, so as to settle circuit ice coating with minimal energy consumption, and thus not only anti-icing but also deicing can be achieved. The intelligent anti-icing deicing system has simple structure and strong implementation, and can be widely applied tohigh-voltage transmission lines in areas with frequent snow disasters.

The invention belongs to the field of monitoring technologies and particularly relates to an arrester on-line monitoring system. The arrester on-line monitoring system comprises an arrester unit, a voltage and current on-line detection unit, a main control unit and a wireless emitter unit. The arrester unit is connected with the voltage and current on-line detection unit which is connected with the main control unit. The main control unit is connected with the wireless emitter unit. Current and voltage signals in the arrester unit are detected out through a current sensor and a voltage sensor, the signals are compared with a reference source phase difference through a comparison amplifier, comparative data are transmitted to the main control module and then transmitted through an antenna in the wireless emitter unit, and remote data transmission is realized, so that defects inside the arrester are effectively detected in time, and maintainers on duty realize remote maintenance without looking for phase line earth points. The maintenance time is largely shortened, the maintenance efficiency is improved, power supplied to users is not effected, power supply reliability is greatly improved, and the equipment damage rate is reduced.