1323 results about "Mains electricity" patented technology

The invention relates to an intelligent charging method and system based on light and wind complementation and intelligent energy storage. According to the method, dynamic optimized charging is realized through multi-source data collaborative decision, and the method comprises the following steps: firstly, collecting real-time data such as light-wind power generation, energy storage SOC, charging load and commercial power supply, analyzing a wind-solar power generation complementary relationship and calculating a real-time complementary coefficient; a dynamic weight distribution scheme of light wind and commercial power is generated in combination with the commercial power state, and an energy storage charging and discharging instruction is generated by fusing peak and valley electricity prices and energy storage efficiency optimization; and based on the adjusted energy storage output power, comprehensively considering the charging demand and the vehicle battery state, and dynamically distributing the power of the charging pile through the charging priority. By adopting the method, energy complementation, economic scheduling and charging demand management can be combined, the utilization rate of renewable energy sources is effectively improved, and the charging cost is reduced.

The invention relates to the technical field of intelligent power supplies, in particular to an intelligent power supply for an unattended station. Comprising a multi-source power supply scheduling unit; an intelligent energy storage management unit; a double-link communication unit; the double-link communication unit is used for constructing a multi-redundancy communication link of wired, wireless and power line carriers, and the double-link communication unit is based on link quality data, adopts an automatic switching strategy to guarantee data transmission continuity, preprocesses monitoring data by using an edge side data clustering algorithm, and realizes offline data caching and transmission flow optimization. Through a multi-source energy dynamic scheduling strategy, according to photovoltaic real-time output, commercial power time-of-use electricity price and load electricity demand, power supply paths of photovoltaic, commercial power and a storage battery can be dynamically optimized, the consumption proportion of clean energy is improved, the dependency degree of high-cost commercial power is reduced, a complex energy structure of photovoltaic, commercial power and storage battery multi-energy complementation is effectively adapted, and the energy utilization rate is improved. And power supply flexibility is enhanced.

The present invention relates to the field of voltage control technology, specifically to an output voltage and mains adaptive synchronization system. In the present invention, by collecting the amplitude and phase data of the mains voltage, and combining the disturbance information on the load side, a disturbance weight set is established, which can realize the quantitative analysis of the impact of the mains fluctuation, thereby improving the perception of the mains change trend, so that the regulation strategy can be adaptively adjusted for specific disturbance events. Based on the weight set, the disturbance probability of the future short period is calculated, and the mains fluctuation range is predicted in combination with the UPS output data, so that the amplitude or phase compensation strategy can be adjusted in advance, which improves the response speed of the power supply system to the mains fluctuation and reduces the impact of sudden fluctuations on the load. The amplitude and phase of the UPS output are sampled at multiple frequencies, and converted to a unified reference system using a coordinate transformation method, which can ensure that the amplitude and phase information of each frequency component are compared under the same coordinate reference.

The invention discloses an elevator control system with an electricity-saving quantity calculation function, which relates to the field of elevator control and comprises an energy-saving control module, a first electric energy sampling module, a second electric energy sampling module, a third electric energy sampling module, a fourth electric energy sampling module, a fifth electric energy sampling module, a battery module, a conversion module and an auxiliary power supply module, the mains supply and the battery module are used for supplying power to the auxiliary power supply module, the auxiliary power supply module supplies power to the energy-saving control module and the conversion module, the alternating-current side of the conversion module is connected with the second electric energy sampling module connected with the mains supply, and the direct-current side of the conversion module is connected with the battery module; the third electric energy sampling module is arranged between the joint of the conversion module and the battery module and the battery module, the fifth electric energy sampling module is arranged between the joint of the conversion module and the battery module and each elevator, and the fourth electric energy sampling module is arranged between each elevator and the mains supply; the first electric energy sampling module is arranged between the auxiliary power supply module and the commercial power. According to the invention, the saved total electric quantity can be calculated.

The invention discloses an electric power control method based on a diesel generator, commercial power and photovoltaic grid connection. The method comprises the following steps: acquiring operation data of commercial power, a diesel generator and photovoltaic-energy storage through an energy management system, constructing a multi-target dynamic optimization model, and distributing power by taking the lowest comprehensive operation cost, the highest power supply reliability and the minimum carbon emission as targets; the power analysis and regulation unit adopts a double-loop mechanism of outer-loop Kalman filtering prediction compensation and inner-loop model prediction control, synchronizes the voltage, frequency and phase of the side to be connected with the grid and the power grid side, and smoothly switches the power change rate of each energy source in the process through a self-adaptive sliding mode control strategy; and the grid-connected switching unit intelligently pre-judges the grid-connected switching opportunity by using a long short-term memory (LSTM) network and fuzzy logic fusion model. According to the invention, the energy utilization efficiency and the power supply stability are improved, multi-energy intelligent dynamic regulation and control are realized, the comprehensive operation cost of the system is effectively reduced, and reliable power supply under complex working conditions is ensured.

The invention relates to the field of new energy technology and power electronics, and discloses a photovoltaic diesel generator energy storage hybrid off-grid and grid-connected household energy storage system, which comprises a data acquisition and state monitoring module for acquiring photovoltaic, diesel generator, energy storage, load and commercial power states in real time and generating system state parameters; the central control and decision module generates a control strategy containing an operation mode and an energy scheduling instruction; the energy flow and conversion execution module executes energy conversion and flow; the seamless switching control module realizes non-impact switching between modes; the self-adaptive safety protection module dynamically adjusts protection parameters; and the emergency response and recovery module executes black start and active recovery in an emergency state. According to the invention, through the unified central control and decision-making module, photovoltaic, diesel generator, energy storage and commercial power scheduling logics are integrated to form a collaborative energy management core, and the system can carry out global optimization on energy flow in grid-connected and off-grid modes according to a preset priority principle.

The invention relates to a flywheel energy storage UPS system and method using a split transformer, and the system comprises a standby generator set which is disposed at a power supply end and is connected in parallel with a commercial power supply end, and when the commercial power is abnormal, the standby generator set can serve as a power supply to supply power to a load; one end of the switch control assembly is connected with the commercial power and the standby generator set, the other end of the switch control assembly is connected with a load, and the commercial power, the standby generator set and the load can be connected or disconnected; the output end of the flywheel energy storage device is connected to a power supply line between the switch control assembly and the load and can serve as a power source to supply power to the load. The number of the flywheel energy storage devices is more than two, and the more than two flywheel energy storage devices are connected to a power supply line through the split transformer. Compared with a traditional on-line low-voltage UPS system, the on-line low-voltage UPS system has the advantages that by using the backup flywheel energy storage device and the split transformer, the operation efficiency is as high as 99%, and the system loss is greatly reduced.

The invention discloses a multifunctional gearbox system adopting mechanical energy for power generation, which is characterized in that the mechanical energy for power generation comprises a mechanical wheel, a multifunctional gearbox and a generator; the mechanical wheel is formed by rotating a wheel shaft, a rim body and the rim body in a wheel groove; an intelligent braking device is mounted on the mechanical wheel; the multifunctional speed changing box is a gear speed changing box; the multifunctional gearbox has a driving motor power input function, a mechanical energy input function and a gearbox output function; the power supply of the driving motor is mains supply, and provides power for the multifunctional gearbox to start the mechanical wheel and the generator and maintain the rotation of the mechanical wheel.

The invention discloses a dynamically scheduled solar energy and mains supply dual-mode energy storage street lamp system, belongs to the technical field of new energy and intelligent power grids, and aims to solve the technical problems of how to realize dynamic distribution of energy storage and power supply and how to perform energy-saving scheduling on street lamp power supply. Comprising a photovoltaic power generation module, an energy storage module, a mains supply access module, a weather prediction module, an intelligent controller, an electricity price time-sharing module, an LED lighting module and a dual-mode energy storage control platform. Time-of-use electricity price table data, a photovoltaic electric energy estimated value corresponding to a future time period and an actual electricity consumption estimated value serve as influence factors, solar power supply and commercial power supply are distributed and dispatched through a decision tree based on the influence factors and a predefined dual-mode energy storage function strategy, and the brightness of an LED lamp is regulated and controlled.

The invention provides an intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information through a group method, and relates to the field of power electronic technologies and uninterruptible power supplies, intelligent identification module groups X1-X27 used for monitoring short-circuit fault characteristic information of a high-voltage power supply network are additionally arranged in a standard ISPS, and the intelligent identification module groups X1-X27 are grouped according to attributes of the characteristic information; the characteristic information from each intelligent identification module is used for controlling the rapid conversion of the standard ISPS output end, so that the output end conversion index under the high-voltage short-circuit working condition can also meet Tlt; the time is 0.01 ms; the system comprises the intelligent identification module group, and an intelligent controller IPo, a composite rapid circuit changer Cf and an abnormal emergency branch Ae which are related to the intelligent identification module group, and also comprises a commercial power direct transmission branch Dt, monitoring instruments IA, IA1-IA3, an intelligent storage battery unit IIU and other matched components or units which are necessary for a standard ISPS.

The utility model relates to an elevator rescue power supply circuit based on integrated star-sealing transformation, the elevator rescue power supply circuit comprises a contactor, a commercial power supply circuit and a UPS power-off rescue circuit, the contactor comprises a contact support, an upper layer contact and a lower layer contact, the upper layer contact and the lower layer contact are jointly arranged on the contact support and interlocked with each other; the commercial power supply circuit is connected with the upper layer contact, and the UPS power-off rescue circuit is connected with the lower layer contact. And the upper layer contact and the lower layer contact share one loop. According to the contactor, when the elevator operates normally, the upper-layer contact is closed, and the lower-layer contact is disconnected. According to the contactor, when the elevator is powered off, the upper-layer contact is disconnected, and the lower-layer contact is closed. And the contactor is connected with a main loop and a control loop of the elevator. By improving the structure of the integrated star-sealing contactor and cooperatively improving the corresponding power supply circuit, the upper-layer contact and the lower-layer contact of the contactor are mutually interlocked, and the contactor can be applied to reliable switching between a mains supply circuit and a UPS power-off rescue circuit, so that the mains supply circuit is connected under the normal condition to enable an elevator to operate normally, and the service life of the elevator is prolonged. When the elevator is powered off, the UPS power-off rescue circuit is switched to supply power to the main loop and the control loop so as to complete power-off leveling rescue, the number of contactors and related connecting wires can be reduced, and therefore the layout space of a control cabinet is further optimized.

The invention relates to the technical field of power supply management, and discloses an intelligent management method and system for an uninterruptible power supply, and a storage medium. The method comprises the steps that the actual power of a load end is updated every first duration, and when a power supply end starts to supply power, the actual power is corrected based on the load volatility to obtain required power; starting at least one uninterruptible power supply based on the required power, so that the load utilization rate of the power supply end is within a standard range; defining the started uninterruptible power supply as a first power supply, obtaining the residual electric quantity and the electric quantity attenuation rate of the first power supply at intervals of second duration, and determining a high-risk power supply based on the residual electric quantity and the electric quantity attenuation rate; if the idle uninterruptible power supply exists in the power supply end, the idle uninterruptible power supply is online to replace the high-risk power supply, and otherwise, the load equipment is turned off; after the commercial power is recovered, the uninterruptible power supply in the power supply end is charged based on the charging priority, and sustainable balance between charging safety and the service life of equipment is achieved.

The invention discloses a shared suspension type charging pile for a new energy automobile, and relates to the technical field of charging piles. The shared suspension type charging pile for the new energy automobile comprises two transverse moving mechanisms, a longitudinal moving mechanism is fixedly arranged at the lower ends of the two transverse moving mechanisms, a charging mechanism is arranged at the upper end of the interior of the longitudinal moving mechanism in a rolling mode, the charging mechanism comprises a supporting base, and an upper cover plate is fixedly arranged at the upper end of the supporting base. An electric lifting frame is fixedly arranged at the lower end of the supporting base, an input cable is fixedly arranged on one side of the interior of the electric lifting frame, the input cable is connected to a mains supply, a lifting frame is fixedly arranged at the lower end of the electric lifting frame, and a protection cable is fixedly connected between the lifting frame and the interior of the electric lifting frame. The charging mechanism can be flexibly moved to adapt to the charging port, so that the charging process is simplified, the cable can be prevented from being dragged vigorously, the service life of the cable is prolonged, the maintenance cost is reduced, and the use convenience and stability are improved.

The invention provides an intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information by a centralized method, relates to the field of smart power grids and uninterruptible power supplies, and is mainly characterized in that characteristic information monitoring module groups Xa1 to Xa3, Xb1 to Xb3, Xc1 to Xc3 and a shared wide-range switch MS are additionally arranged at phases A, B and C of a commercial power direct transmission branch of a standard ISPS; the ISPS is used for capturing, processing and transmitting characteristic information of a high-voltage short circuit, and starting output end conversion in advance according to the characteristic information, so that a conversion index Tlt is ensured; the time is 0.01 ms. The system further comprises an intelligent controller IPo, a composite quick circuit changer Cf and an abnormal emergency branch Ae which are related to feature information, and further comprises a mains supply direct transmission branch Dt, monitoring instruments IA, IA1-IA3, an intelligent storage battery unit IIU, related switches and other components which are necessary for the ISPS system. At the moment of high-voltage short circuit, the feature information of each feature information monitoring module group is sent to the IPo after being processed by the MS in a centralized manner, and the IPo controls the Cf to convert in advance.

The invention provides a power supply strategy optimization method for condensation control and a ring main unit, and belongs to the technical field of power supply, and the method specifically comprises the steps: determining the coincidence probability of the ring main unit and humidity intervals of different fluctuation types in a future preset time period according to the humidity monitoring data of the ring main unit, when the coincidence probability is utilized to determine that the distribution data of the coincidence risk time period in the future preset time period meets the requirement, the temperature change condition of the ring main unit under the weather data of the current date is taken as the basis, and the temperature change condition of the ring main unit is determined on the basis of the coincidence probability of the coincidence risk time period and humidity intervals of different fluctuation types; according to the method, the adjustment demand type of the humidity adjustment device of the ring main unit is determined, and the power supply processing strategy of the temperature adjustment device of the photovoltaic device at different monitoring temperatures is determined by using the adjustment demand type and the humidity monitoring data, so that the reliability of the control processing of the condensation risk is improved, and the use of the commercial power is reduced.

The embodiment of the invention provides a power supply method, electronic equipment and a storage medium, and belongs to the technical field of communication. Load information of a power failure time period is obtained, a target value of battery discharge cut-off capacity is determined according to the duration of the power failure time period and the load information, and power is supplied to main load equipment through a battery power supply module in the power failure time period until the battery remaining power of the battery power supply module reaches the target value of the battery discharge cut-off capacity. And switching to supply power to the main load equipment through the fuel oil power supply module and charging the battery power supply module through the fuel oil power supply module. According to the scheme of the embodiment of the invention, the optimal discharging or charging depth can be dynamically measured and calculated; reasonable parameters are set to coordinate the battery and the oil engine to supply power when the mains supply breaks down, so that the fuel economy of the oil engine is improved, pollution discharge is reduced, and meanwhile the service life of the battery and the service life of the oil engine are prolonged.

The invention discloses an anti-countercurrent system based on V2G equipment and a control method, and the system comprises at least two charging and discharging modules which are connected to one side of a power line, and the other side of the power line is connected to a power grid; the charging and discharging module comprises a first bidirectional electric meter and a V2G charging pile. One end of the V2G charging pile is connected with the power line through the first bidirectional ammeter, and the other end is connected with the charging terminal. The bidirectional main electricity meter is connected between the power line and the power grid; the contactor is connected between the bidirectional main ammeter and the power line. The anti-countercurrent control module is in communication connection with the bidirectional main electric meter, the contactor, the first bidirectional electric meter and the V2G charging pile; according to the invention, a virtualized anti-countercurrent control architecture is adopted, any V2G charging pile or cloud server is used as an anti-countercurrent control module, a traditional hardware controller is replaced by existing equipment computing power, global power regulation and control are realized based on data provided by the bidirectional main ammeter and the first bidirectional ammeter, and the system deployment cost and complexity are significantly reduced.

A new energy elevator belongs to the technical field of elevators, and includes an elevator control device and an elevator power supply system. The elevator power supply system includes a photovoltaic power supply device, a power switching circuit system, a mains power supply, a power supply output controller, a first storage battery, and a second storage battery; the power switching circuit system includes a first power switching switch, a second power switching switch, and a third power switching switch connected and controlled by the power supply output controller, and the connection end of the first power switching switch is connected to the photovoltaic power supply device, the first storage battery, and the second storage battery; the connection end of the second power switching switch is connected to the third power switching switch, the first storage battery, and the second storage battery; the connection end of the third power switching switch is connected to the elevator control device and the mains power supply. The elevator power supply system integrates photovoltaic power supply, dual battery energy storage, and intelligent switching technology, which not only improves the reliability and energy efficiency of the elevator power supply, but also reduces the dependence on the mains power supply, and can ensure the green and low-carbon operation of the elevator.

The invention relates to an off-peak electricity peak use control method and a temperature control strategy and a power management system applying the off-peak electricity peak use control method, and belongs to the technical field of energy-saving control. Respectively establishing objective functions of the total cost of the storage battery module, the volume of the storage battery, the recovery period and the loss in the electricity storage process of the storage battery; s2, solving the plurality of objective functions through an NSGA-II algorithm to obtain a Pareto frontier solution; and S3, calculating the weighted sum of each objective function by using a minimize function, obtaining an optimal solution with the minimum weighted sum in the solutions of the Pareto frontier, configuring the storage battery according to the optimal solution, and switching the commercial power or the storage battery to supply power to the compressor according to the electricity price of the peak valley electricity period. According to the valley electricity peak use control method, the problems that the capacity configuration of the storage battery is not clear and the recovery period is not clear are solved, the power consumption cost is minimized, and the pressure of the peak period of the power grid is relieved.

The present invention provides an energy-storage emergency power supply and driving control method and apparatus for a mine induction motor hoist. The method comprises: acquiring working states of a mains power loop 1 and a mains power loop 2 in real time; on the basis of abnormal working states of the mains power loop 1 and the mains power loop 2, determining whether to disable a mains power supply mode and enable an emergency power supply mode; enabling the emergency power supply mode, and switching the hoist from mains power supply to emergency power supply; starting hoist auxiliary units and a hoist electric control unit, and determining whether the hoist meets an operation condition; receiving a hoist operation instruction, and on the basis of the operation instruction, controlling the hoist to operate; and exiting an emergency working mode, and switching the hoist from the emergency power supply to the mains power supply. The present invention uses a combination of new energy storage and conversion to replace the original diesel engine power generation system, solving the problem of emergency power supply of a control system for a mine induction motor elevator, allowing for rapid establishment of an emergency rescue hoisting channel, and providing a safety guarantee for mine workers and production.

The invention discloses an intelligent guarantee control system and method for a floating type wind turbine generator, and the system comprises a mains supply, a diesel generator, a dual-power switch cabinet, a battery cabinet unit, a time relay group, a redundancy module, at least two lubricating pump units, at least two oil supplementing pump units, a light storage unit, a satellite communication system, a switch, and a control system PLC. The mains supply and the diesel generator are electrically connected with the battery cabinet unit through the dual-power switch cabinet, the diesel generator is in communication connection with the switch and the main PLC of the unit, and the optical storage unit, the lubricating pump unit and the main PLC are electrically connected with the battery cabinet unit. The oil supplementing pump unit, the satellite communication system, the switch, the control system PLC and other power taking devices of the unit are electrically connected with the light storage unit through the time relay set, and the time relay set selects the light storage unit or the battery cabinet unit to supply power through the redundancy module. According to the invention, the problems of power supply and unit state information transmission during construction periods of towing, in-place mooring installation, ballast diving and the like of the unit are solved.

The invention provides a shared power bank leasing equipment control method and shared power bank leasing equipment, and the method comprises the steps: determining the priority of a power bank connected to the shared power bank leasing equipment in the operation process of the shared power bank leasing equipment, and monitoring whether the commercial power is cut off or not; and controlling the charge pal connected to the shared charge pal leasing equipment to reversely supply power to the shared charge pal leasing equipment according to the priority under the condition that the mains supply is monitored to be powered off.

The invention discloses a power load switch driving circuit of an electric energy meter. The power load switch driving circuit comprises a step-down rectifying circuit, a voltage stabilizing circuit, an energy storage circuit, an MOS tube switching circuit and a booster circuit, one end of the step-down rectifying circuit is connected with the mains supply, the other end of the step-down rectifying circuit is electrically connected with the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is electrically connected with the MOS tube switching circuit, the energy storage circuit and the output control circuit, and the MOS tube switching circuit is electrically connected with the booster circuit. The invention further discloses an electric energy meter power load switch driving method. The technical problems that an existing driving circuit cannot perform reliable action of a load switch and is complex in structure are solved.

The invention discloses an intelligent power supply system for an integrated energy cabinet of a communication base station, and the system comprises a power supply parameter collection module which obtains parameters such as an input voltage fluctuation sequence and multipath load current data; the power supply feature extraction module performs fusion analysis on the parameters to generate a power supply feature vector set; the decision space construction module presets a power supply strategy knowledge base and a feature vector set, and establishes a power supply decision space index structure; the power supply decision module matches the optimal power supply strategy combination and outputs a first power supply control instruction set; the power supply execution module drives the power distribution unit to execute load power supply switching and storage battery charging and discharging control. The system comprises an energy pool module, an integrated photovoltaic device, a commercial power device and the like to realize access and dynamic distribution; the anti-countercurrent control unit ensures the energy flow safety; the zero-loss switch array regulates and controls an electric energy path to improve the efficiency; the power supply execution module drives multi-power-supply switching, security isolation and path switching, supports commercial power peak clipping, light stacking and off-peak power utilization, and improves the power supply reliability and energy efficiency of the base station.

The invention provides a charging and discharging control method and a power supply controller for a new energy motor home, and belongs to the technical field of new energy motor homes. In order to solve the problem that a power supply controller for a new energy motor home cannot provide alternating current while charging, the invention provides a charging and discharging control method which comprises the following steps: responding to a vehicle charging port complete connection signal, synchronizing a bidirectional vehicle-mounted charger and a mains supply phase, after the phase synchronization, the power supply of the alternating current electric appliance in the vehicle is switched from the inversion power supply of the bidirectional vehicle-mounted charger to the commercial power supply; in response to a charging permission instruction, charging a vehicle power battery through the bidirectional vehicle-mounted charger; and obtaining the total power of the in-vehicle alternating current electric appliance, and adjusting the charging power of the bidirectional vehicle-mounted charger or the total power of the in-vehicle alternating current electric appliance based on a first threshold value. According to the invention, the problem of simultaneous working of charging and inversion is solved, and the situation of interruption and restart of the electric devices in the vehicle in the charging and inversion switching process is ensured not to occur.

The invention discloses a vehicle-mounted intelligent mooring unmanned aerial vehicle system, which belongs to the technical field of unmanned aerial vehicle power supply and comprises a multi-source intelligent power supply system, an intelligent cable management system, an all-terrain precise take-off and landing system, an LED lighting platform system, a mooring box automatic heat dissipation system and a working mode switching system. The multi-source intelligent power supply system internally comprises a solar charging module, an automobile power generation charging module and a mains supply or external generator charging module; the intelligent cable management system comprises a tension sensor, a data acquisition module, a historical tension storage module, a real-time verification module and a real-time feedback module. The LED lighting platform system comprises an intelligent control module, an electric control mechanical adjusting structure and a self-adaptive heat dissipation system. The working mode switching system comprises an individual soldier mode and a mooring mode. The unmanned aerial vehicle supports a mooring mode and an individual soldier mode, has the functions of multi-source power supply, intelligent cable management and precise landing, and achieves integration and intellectualization of the mooring unmanned aerial vehicle, the chassis, the power supply battery and the cable.

The invention provides a grid-connected and off-grid mode switching control method and device and an energy storage parallel operation system, and relates to the technical field of energy storage systems.The method comprises the steps that if the energy storage parallel operation system is not connected to mains supply within a preset voltage range, the energy storage parallel operation system is controlled to enter an off-grid mode; based on the first voltage characteristic information of the energy storage converter host, controlling the energy storage converter slave to adjust the first voltage parameter; if the electric supply in the preset voltage range is connected to the energy storage parallel operation system, controlling the energy storage converter host to enter a tracking pre-synchronization mode from an off-grid mode, controlling the energy storage converter host to track the electric supply and sequentially adjust the second voltage parameter, and controlling the energy storage converter host to track the energy storage converter host and sequentially adjust the third voltage parameter; and controlling the energy storage converter host and the energy storage converter slave to enter a grid-connected mode at the same time. According to the technical scheme, it is ensured that the voltage parameters of the host and the slave are consistent, parallel operation circulating current oscillation can be avoided to a great extent, and the possibility of system faults is reduced.

The present application discloses a power supply and backup network of a communication device. The network includes a medium-low voltage power distribution system, a high voltage battery backup power system, a power distribution system, and a high-voltage direct-current (HVDC) bus system, where the medium-low voltage power distribution system is connected to the power distribution system by the HVDC bus system; the high-voltage battery backup power system is bypassed on the HVDC bus system; the medium-low voltage power distribution system is configured to provide HVDC power for the power distribution system by the HVDC bus system by using input mains power and oil energy backup power; the high-voltage battery backup power system is configured to provide HVDC backup power for the power distribution system by the HVDC bus system; and the power distribution system is configured to distribute, to a connected electrical device, the HVDC power.

The invention discloses a double-voltage adaptive rectification PFC (Power Factor Correction) circuit structure and an electric flame stove. The double-voltage adaptive rectification PFC circuit structure comprises an EMI (Electro-Magnetic Interference) filtering unit, a voltage doubling rectification unit, a full-bridge rectification unit, a circuit switching control unit, a startup protection unit and a power factor correction unit. According to the circuit switching control unit, through conversion of full-bridge rectification or voltage-multiplying rectification, adaptability to commercial power of two different voltages is achieved; according to the power-on protection unit, when 220V mains supply is input, after the circuit voltage is stabilized, the relay RLY2 is completely switched on, and soft start protection is achieved; according to the invention, the MOS tube Q1 / Q2 is alternately connected and disconnected in a time sequence, so that the inductor L2 stores energy or discharges, the capacitor C22 is charged or discharged, the power factor correction unit outputs stable high-voltage electricity to a rear-end circuit or a load, when the MOS tube Q2 is connected, the resistance is zero, the superposed high-voltage electricity is transmitted to the rear-end circuit when the potential of the inductor L2 discharges, and low-loss energy conversion is realized.

The present invention discloses a UPS power supply with an automatic switching function, which relates to the field of power supply. The UPS power supply with an automatic switching function comprises: a mains power supply module, which is used to introduce mains alternating current (AC) power and supply it to a step-down rectifier filter module and a load working module; a step-down rectifier filter module, which is used to convert the AC power into DC power and supply it to a switching and storage module; and a switching and storage module, which is used to store electric energy for a battery when DC power is input, and to control the load working module to use the mains AC power as a power supply. When there is no DC power input, the present invention has the following beneficial effects: the present invention determines the current power state of the battery through a power determination module, and feeds it back to a single-chip microcomputer working module, which controls the working condition of the load through a power supply control module, so that the output power of the battery matches the working condition of the load, thereby ensuring the normal working condition of the main power-consuming equipment of the load and extending the normal working time of the main power-consuming equipment.