81results about How to "Guaranteed uninterrupted power supply" patented technology

The invention is a method of on-line detecting storage battery resistance by secondary discharge, characterized by arranging discharge circuits and II for each cell, adopting secondary discharge and difference value calculation method and thus able to effectively avoid the effect of output current of the rectified power supply, implementing on-line measurement of storage battery resistance and assuring uninterrupted power supply to load.

The invention discloses a method for changing tension simulators on live 10kV power supply line, which includes steps: firstly, confirming weather conditions; secondly, preparing; thirdly, changing the tension insulators on the live 10kV power supply line and includes step 1 insulation shielding, step 2 mounting insulating tightening racks and insulating tighteners, step 3 mounting backup insulating protective pull cords, and step 4 changing the tension insulators. The method can change defective tension insulators timely when the power supply line supplies power normally, guarantee safe and normal power supply of the power supply line, avoid adverse effects of power outage upon power supply enterprises and power consumers, improve power supply reliability, increase power sales, improve industrial service quality, and guarantee uninterrupted power supply for the consumers.

The invention discloses a wide area self-adaptation spare power automatic switching method based on synchronous phasor measurement. By means of topology analysis, an association relationship between buses and lines is determined, a mode of operation of the lines and the buses is recognized, an initial operation state is recorded, faulty area, normal power supply area and area to be restored are determined, whether small power sources in a regional power grid are required to be immediately removed or not is determined, if the small power sources in the regional power grid are not required to be immediately removed, a spare power automatic switching power source is subjected to a quasi-synchronization grid connection, otherwise, all small power circuit switches in the area to be restored are tripped off, all non-fault working power source switches in a power-loss area are tripped off, and power restoration process is completed through circularly searching for power supply buses to be restored and closed corresponding line switches. According to the wide area self-adaptation spare power automatic switching method based on the synchronous phasor measurement, a centralized decision-making coordination mode which is specific to the integrated power grid is utilized so that a novel spare power automatic switching method has the advantages that the wide area is achieved, the method is capable of being self-adaptive to operation mode and the small power sources access to the power grid.

The invention discloses a lifting type rail insulation operation platform which comprises a mobile device and an insulation platform body that is provided with a rail, wherein the mobile device comprises an up-down lifting device, a left-right moving device and an insulation platform bracket; the up-down lifting device comprises a guide rail, a worm and gear device, a pulley block, a lifting rope and a lifting limiter; the worm and gear device is arranged at the bottom end of the guide rail; the pulley block comprises guide rail pulleys fixed on the insulation platform bracket and used for clamping the guide rail and a lifting pulley penetrating and guiding the lifting rope; one end of the lifting limiter is fixed on the insulation platform bracket, the other end of the lifting limiter is matched and fixed with the guide rail; the insulation platform bracket is arranged in front of the guide rail and is fixed with the insulation platform body, the insulation platform bracket moves up and down along the guide rail through the guide rail pulleys arranged at the upper end and the lower end of the bracket; and the left-right moving device comprises a support pulley, two pulley chains and a metal fixing chain. According to the invention, up-down and left-right regulations of an operation position can be carried out, thus the safety of a hot line work is improved.

The invention relates to a self-powered alarm terminal of a wireless monitoring system, which belongs to the fields of energy-saving technologies and wireless audio and video transmission technologiesin monitoring and alarm systems. Two power supply ways of a hand-cranked generator and a solar cell are adopted for power supply, thereby providing an uninterrupted working power supply for the terminal; and the alarm terminal supports the WiFi wireless transmission protocol, provides the bandwidth above mega level, realizes the real-time two-way transmission of voice and video data and comprisesan automatic positioning device, so that the alarm terminal can be applied in a variety of emergency alarm application scenarios which can not rely on an external power supply and are positioned in remote areas or harsh environments. The alarm terminal has the advantages of reliable and safe data transmission, and simple and fast network erection.

The invention relates to an active distribution network fault recovery method with consideration of random variation of distributed power supply outputs. The method is characterized by comprising thefollowing steps: step one, carrying out active distribution network island division based on a depth and breadth alternate joint strategy; and step two, on the basis of comprehensive consideration offault recovery whole-period flow changes, carrying out active distribution network reconstruction optimization by using a low-offset stochastic simulation method. Therefore, the maximum output of theDG is utilized fully and loads are recovered as many as possible; and uninterrupted power supply of important loads is ensured.

Disclosed is an island heuristic load reduction model construction method for an active power distribution network. The method comprises the following steps: constructing element models when an island runs, including a blower fan output model, a photovoltaic output model, a load model and a storage battery model; constructing a load reduction model; and solving an island load reduction model. According to the invention, the island heuristic load reduction model construction method for the active power distribution network is fast in operation speed and small in occupied memory, is used for rapidly determining a load reduction strategy, helps to improve the operation reliability of the active power distribution network, guarantees uninterrupted power supply of an important load, facilitates utilization of a renewable distributed power source, saves fossil energy and protects the ecological environment.

The invention provides a method for rapidly opening and closing a mirror field. The method for rapidly opening and closing the mirror field is used for opening and closing the mirror field of a tower type solar thermal power plant and comprises the steps that a heliostat of the mirror field is switched to a first-stage field opening posture before field opening of the heliostat; the heliostat is switched to an operation sun-tracking posture from the first-stage field opening posture; the heliostat is switched to a first-stage field closing posture before field closing of the heliostat; the heliostat is switched to a field closing finishing posture from the first-stage field closing posture. Through scientific scheduling of the mirror field when the mirror field is opened and closed, the method for rapidly opening and closing the mirror field guarantees the safety of a heat absorber to the maximum extent, shortens the time for opening and closing the mirror field, lowers the cost of spare batteries, and increases the actual operation power generating time of the mirror field.

The invention discloses a loosening-preventing and automatic-fastening device of connection bolts for combination and fixation of storage batteries. According to the loosening-preventing and automatic-fastening device, a ratchet sleeve is arranged on the front side of a fixed connection handle, a ratchet is arranged inside the ratchet sleeve, fixed inner teeth are arranged on the inner side of the ratchet, ratchet teeth are arranged on the outer circumference of the ratchet, receding stopping grooves are formed in the inner side of the ratchet sleeve, receding stopping springs are arranged in the receding stopping grooves, a receding stopping pin is arranged on the front side of each receding stopping spring, a fixed clamping base is arranged on the rear side of the fixed connection handle, and a tension spring is arranged on the upper side of the fixed clamping base. When copper connection bars of a storage battery pack are twisted slightly, and alternatively vibration is produced due to environmental factors, the ratchet teeth prevent the bolts from moving in the loosening direction under the action of the receding stopping pins, the bolts are pushed to rotate in the fastening direction, and the function of automatically fastening the bolts is achieved.

The invention relates to the field of power intelligent energy systems and discloses an intelligent energy system based on a power electronic transformer, which comprises a power electronic transformer, an AC/DC converter, an AC/AC converter, a DC/AC converter, a DC/DC converter, a photovoltaic and the like distributed power supply, an electric automobile, an energy storage system, a DC load, an AC load and various AC generators. According to the intelligent energy system based on the power electronic transformer disclosed in the invention, the power electronic transformer module is formed bythe AC/DC converter, a two-way DC/DC converter and the AC/DC converter, the power electronic transformer can thus be used for switching among four states of DC low voltage, AC low voltage, DC high voltage and AC high voltage, and compared with the traditional transformer which is only suitable for transmission of single-frequency and one-way voltage, the power electronic transformer can be almostsuitable for voltage two-way transmission under all conditions, frequency and voltage conversion is very flexible, and fault transmission at the two ends of the transformer can be effectively blocked.

The invention discloses an intelligent wristband with a body temperature power generation and power supply function. The intelligent wristband comprises a wristband body. An ARM main board, a polymer battery, a charging control module, a GPS positioning module, a three-axis gyroscope, an acceleration sensor and a temperature difference power generation element are arranged inside the wristband body or on the wristband body, wherein the polymer battery, the charging control module, the GPS positioning module, the three-axis gyroscope and the acceleration sensor are electrically connected with the ARM main board, and the temperature difference power generation element is connected with an input end of the charging control module. Charging ends of the charging control module are connected with the positive electrode of the polymer battery and the negative electrode of the polymer battery. According to the intelligent wristband, by arranging the temperature difference power generation element to conduct power generation and power supply on the polymer battery through the body temperature, it is ensured that power is unceasingly supplied to the intelligent elements such as the ARM main board, the GPS positioning module, the three-axis gyroscope and the acceleration sensor.

The invention discloses a local control method for an energy management unit of a household microgrid energy router, and aims to research and develop household microgrid energy router energy management unit equipment for a household microgrid system formed by household photovoltaic power generation equipment, lithium battery energy storage equipment and typical household appliances and for the problems of stable operation, cooperative control and the like of the system. When the commercial power fails, the household microgrid energy router energy management unit equipment is in local linkage with a DC lighting main control unit DCU to execute an MEMS simple scheduling command and allow the most appropriate household microgrid to supply power to the DC lighting LED, and the main-standby complementation of the AC power grid and the household light storage DC microgrid is achieved. The EMU integrates a single-chip microcomputer containing different operation control strategies, provides aset of control logic of the household microgrid in a grid-connected mode, an off-grid mode and a limited mode, achieves household-level microgrid routing energy management scheduling and coordinationcontrol of multi-voltage-level sequence AC/DC bus energy flow, and achieves maximum utilization of photovoltaic power generation.

The invention discloses a ring main unit self-powered system which comprises a first transformer, a second transformer, a current sensor and a third transformer, wherein the first transformer, the second transformer, the current sensor and the third transformer are sequentially connected. The ring main unit self-powered system further comprises a rectifier, a super capacitor, a relay, an inverter, a digital signal processor, a temperature sensor and a humidity sensor, wherein the rectifier, the super capacitor, the relay and the inverter are sequentially connected. An input end of the first transformer is connected with the alternating current; an input end of the rectifier is connected with an output end of the first transformer; an output end of the inverter is connected with an input end of the third transformer; the digital signal processor is respectively connected with the current sensor, the relay, the temperature sensor and the humidity sensor. The ring main unit self-powered system is low in cost and capable of guaranteeing continuous electricity supply to a ring main unit under various conditions, especially in the high-temperature environment and in the low-temperature environment.

The invention discloses a new-energy power generator grid-connection system comprising a new-energy power generator. The new-energy power generator is connected with a load through a bus and powers the same. The bus is connected with an external grid through a main breaker. The input end of the external grid is provided with a grid voltage sensor. The bus is provided with a bus voltage sensor. The grid voltage sensor and the bus voltage sensor are both connected to a central processing unit. The central processing unit is connected with the main breaker through a master controller control module. The load, gas power generation and a photovoltaic generation branch can be flexibly controlled, the modes such as grid-connected operation and wheeling operation are guaranteed, a transistor is used as a grid connection device after the system is in sync with the power grid, low impact and high reliability are ensured for synchronous grid connection, a power checking mode is provided, penalty paid for an excessively low grid-connected operation power factor is avoided, photovoltaic generated power is utilized as far as possible according to actual conditions to provide power, utilization efficiency of energy is increased, energy is saved, and emission is decreased.

The invention relates to an automatic capacity checking device and a capacity checking method for a direct-current power supply system of a transformer substation, and the device consists of a storage battery pack AC/DC rectifying circuit, a DC/AC inverter circuit, a capacity checking circuit, a bidirectional buck-boost circuit, a battery management system, a communication interface and a dynamic monitoring circuit, the AC/DC rectifying circuit and the multi-path backup storage battery pack supply power to the direct current bus; and when capacity checking of discharging and charging of a storage battery pack is needed, an online capacity checking method is adopted, the discharging voltage and the charging voltage are adjusted through a bidirectional buck-boost circuit in the capacity checking circuit, a power grid is discharged through a DC/AC inverter circuit while a direct-current load is discharged, the discharging speed is increased, the AC/DC rectifying circuit is used for carrying out constant-current charging on the storage battery pack, stability of direct-current bus voltage is guaranteed in the discharging and charging process, automatic detection and remote monitoring of the charging and discharging state of the battery are achieved, human intervention is reduced, and recycling of discharging electric energy is achieved.