134results about How to "Reduce power-on time" patented technology

The invention discloses a method for power over Ethernet. Power sourcing equipment acquires power sourcing information of Ethernet ports, and the power sourcing information includes the state of powered devices; if the state of the powered devices of the Ethernet ports is ineffective, the powered devices connected with the power sourcing equipment via the Ethernet ports are detected, and when the powered devices are ensured to be effective powered devices, the state of the powered devices of the Ethernet ports is set to be effective and the powered devices are powered on; and if the state of the powered devices of the Ethernet ports is effective, the powered devices are directly powered on so that rapid power-on and starting of the powered devices can be realized. The invention also provides the power sourcing equipment and a system for power over Ethernet.

The invention discloses a multiple-magnetron type large-capacity microwave-assisted extraction machine and a microwave-assisted extraction method thereof, belonging to the field of biological raw material extraction equipment and an extraction method. The multiple-magnetron type large-capacity microwave-assisted extraction machine comprises a rack, a transmission device, a microwave tank, a microwave device, an air-entrapping device, a rotor device, a discharging device and a control device, wherein a plurality of magnetron installing holes uniformly and equidistantly distributed are formed in the wall of the microwave tank; the microwave device comprises a plurality of high-frequency magnetrons which are uniformly and equidistantly arranged on the wall of the microwave tank, and the high-frequency magnetrons are connected with an external power source; the air-entrapping device comprises a plurality of compressed air inlets formed in the wall of the microwave tank, a compressed air input pipeline and a plurality of electromagnetic valves; the rotor device comprises a rotating shaft and a plurality of stirring wings which are fixed on the rotating shaft and form certain crossing angles with the rotating shaft. The multiple-magnetron type large-capacity microwave-assisted extraction machine has the advantages that feed liquid in the microwave tank continuously runs and interchanges, an extractive is uniformly subjected to the action of an electromagnetic field to be heated, the extraction rate is increased, and the extraction time is shortened.

Disclosed are an efficient electric defrost device for a refrigerator, and a method thereof, belonging to the defrost field. In the device, a compressor, an oil separator, a condenser, a filter and a regenerator are connected in sequence through pipe flanges, and the regenerator is then connected with the compressor through a pipe flange; the regenerator, a solenoid valve, an expansion valve and a coil pipe are connected through pipe thread; the coil pipe is connected with a gas collecting pipe through welding; the gas collecting pipe is connected with the regenerator through a pipe flange; the gas collecting pipe is bound with a temperature controller; fins are inserted in the coil pipe and an electric heating pipe; a return air door is arranged on an enclosure box; a blower, the coil pipe, the fins, the electric heating pipe, the gas collecting pipe, the temperature controller and a temperature bulb B are arranged inside the enclosure box which is connected with a water discharge pipe through thread; and the electric heating pipe, the temperature controller, a controller, a protector and the solenoid valve are electrically connected. The method comprises the following steps: the device jumps off at 8 DEG C and gets resetted at 3 DEG C; the solenoid valve is closed in the refrigeration and defrost delay time, then the blower stops, while the compressor and the condenser start to work; the refrigerant enters into the condenser for cold storage; the return air door is closed; the electric heating pipe is electrified for defrosting in a set defrost time; the water discharge time is set; and the return air door is opened for refrigeration. The device is used for defrosting, which is energy-saving and highly efficient.

The invention provides a power supply device of a power over Ethernet (POE) and a power supply method. The power supply device of the POE comprises a device power supply, a power supply, a device control module and a power supply control module. The power supply and an access of the device power supply and the power supply control module can be disconnected under the condition that no power is supplied to the POE. The power supply and the access of the device power supply and the power supply control module are connected when the power is supplied to the POE. Accordingly, unified and systemic management control of the modules in the power supply device of the POE is achieved, and electric energy consumption in the power supply and the device power supply is further reduced. In addition, the power-on time of the power supply and the power supply control module is decreased, and the service life of the power supply, the device power supply and the power supply control module is prolonged.

The invention relates to a safe and reliable energy-saving type LED yard mosquito killer lamp based on the Internet of Things. The safe and reliable energy-saving type LED yard mosquito killer lamp comprises a base, a lamp post, a lighting mechanism and a top plate. The lighting mechanism comprises supporting blocks, a cleaning mechanism, a lamp source and a mosquito killing mechanism. The mosquito killing mechanism comprises a power grid and two lifting assemblies. Each lifting assembly comprises a first motor, a buffering block, a first drive shaft and a sliding block. The cleaning mechanismcomprises a second motor, a cleaning pipe, a vertical rod and two cleaning blocks. A telescopic assembly is arranged in the cleaning pipe. According to the safe and reliable energy-saving type LED yard mosquito killer lamp based on the Internet of Things, the mosquito killing mechanism is used for controlling electrification of the power grid, the power grid conducts mosquito killing when the number of mosquitoes is large, then, the power grid is powered off, the electrification time of the power grid is shortened, and energy saving of equipment is achieved. In addition, after mosquito killing is finished, through the cleaning mechanism, brushes make contact with the power grid and are kept rotating, the mosquitoes on the power grid are swept away, cleanliness of the power grid is guaranteed, the power grid can be conveniently repeatedly used, and practicability of the equipment is improved.

The ferritic stainless steel mother liquid smelting process in the charge mixture mode of dephosphorized molten iron+waste carbon steel+ferrochromium includes the following steps: feeding dephosphorized molten iron, waste carbon steel and ferrochromium and powering on; adding ferrosilicon after powering for 2.0-4.0 Mwh; beginning oxygen blast after powering for 5.0-7.0 Mwh; regulating the oxygen flow rat to 2500 Nm3 / h and total oxygen amount to 9-10 Nm3 / t after power consumption reaches 8.0-12.0 Mwh; adding lime after power consumption reaches 7.0-10.0 Mwh; spraying carbon powder after power consumption reaches 16.0-20.0 Mwh; adding dolomite after power consumption reaches 15.0-18.0 Mwh; reducing after power consumption reaches 220-240 Kwh / t and the measured temperature reaches 1610 deg.c; and tapping after power consumption reaches 250-320 Kwh / t and the measured temperature reaches 1630-1660 deg.c. The present invention has low power consumption and other advantages.

The invention discloses a method for smelting stainless steel mother liquor with a furnace wall carbon-oxygen spray gun in an arc furnace. The method is characterized in that an eccentric bottom tapping arc furnace provided with the furnace wall carbon-oxygen spray gun is used; during smelting, the furnace wall carbon-oxygen spray gun is used to preheat and cut metallic charge and perform oxygen blowing and decarburization in the oxidation period; by using the furnace wall carbon-oxygen spray gun to provide chemical energy and preheat and cut scrap steel, the melting rate can be increased, the smelting time, and electrode consumption and smelting power consumption can be reduced; a burner adopts a coherent jet oxygen supply mode to blow oxygen and decarburize so that the utilization rate of oxygen is high and the oxidation quantity of chromium is low; and the smelting time and the metallic charge consumption are reduced. The method uses the furnace wall carbon-oxygen spray gun to smelt stainless steel, thus the consumption of oxygen lances can be reduced, the production cost can be significantly lowered and the labor intensity of workers can be significantly reduced.

The invention discloses a car parking and taking method of a sliding contact line charging type stereo garage unit. The method comprises the steps of reverse parking, wherein if an idle lower-layer car carrying plate exists, a car is driven to the lower-layer car carrying plate along car driving oblique blocks, sliding rods trigger pressing switches when rear wheels of the car cross positioning protrusions, charging piles are connected with a charging circuit to charge the car, reverse parking is finished, and if no idle lower-layer car carrying plate exists, an idle upper-layer car carrying plate is put down to carry the car; car driving, wherein car driving achieved through the lower-layer car carrying plate and car driving achieved through the upper-layer car carrying plate are conducted, and car driving achieved through the lower-layer car carrying plate is conducted through the steps that the car is started and made to drive forwards, and the car passes through the car driving oblique blocks, leaves the lower-layer car carrying plate and then drives away from the garage unit. By means of the car parking and taking method, the parking capacity of the garage unit can be fully utilized, the car storing and taking process is optimized, the efficiency is improved, and the advantages that falling is prevented, and the charging piles are automatically energized are achieved.

This invention relates to an electric furnace smelting technique for crude stainless steel liquid with its process including: a) materials proportioning. Waste stainless steel shares 15~25% in total added metal. Chromium-iron alloy shares 15~25% in total added metal. Lime is added to an amount of 30~45 kg per ton of added metal. And dephosphorized molten iron shares 35~60% with its element content of 2.50~3.80% of C, less than 0.020% of phosphorus, less than 0.040% of sulfur. b) Smelting. Oxygen blowing amount is controlled at 5~10 cu m / t and blowing flux is controlled at 1500~2500N cu m / h. c) reduction. Ferrosilicon powders are spitted at 2.5~3.5kg / t and carbon powders at 1.5~2.5kg / t. Or ferrosilicon is added at 2.5~3.5kg / t and aluminium at 1.5~2.5kg / t. d) tapping, with ultimate temperature controlled at 1640~1660 deg.C. This invention employs dephosphorized molten iron, which reduces the raw materials proportioning cost and smelting time as well as the consumption of electricity power, electrodes and patching materials in electric furnaces.

The invention provides a method and a system for controlling hard disk electrification in a hard disk array. The method comprises the steps of detecting output current of a power module in real time, comparing the output current and a set first threshold value, adopting a preset first time interval to sequentially perform the electrification to each hard disk in the hard disk array when the output current is smaller than the set first threshold value, comparing the output current with a set second threshold value when the output current is larger than the set first threshold value, and adopting a preset second time interval to sequentially perform the electrification to each hard disk when the output current is larger than or equal to the first threshold value and smaller than the second threshold value, wherein the second threshold value is larger than the first threshold value, and the second time interval is larger than the first time interval. By means of the method and the system for controlling the hard disk electrification in the hard disk array, electrification impact current is controlled not to exceed power output limitation when the electrification is performed to the hard disk array, and electrification time of the whole hard disk array is short.

The invention discloses a system power failure protection realizing method for a NAND FLASH. The method comprises following steps: 1, carrying out mapping management to all blocks in the NAND FLASH through a first level stable, a second level table and a third level table; 2, electrifying a system, loading the first level stable, the second level table and the third level table, recovering the system to a working state; 3, judging whether an abnormal power failure is generated in a data updating process according to the data in the tables; and 4, when the information stored in the NAND FLASH changes, updating the first level stable, the second level table and the third level table. According to the method of the invention, after the new first level stable, the new second level table or the new third level table is written successfully, the original first level stable, the original new second level table or the original new third level table is erased; the tables are located in a searchable address range; therefore, after the system is electrified again after the power failure, the system stores the data in the tables completely; and the system state can be recovered according to the data in the tables.

An improved amplifier circuit is provided herein with a gain stage and a bias stage, which may be switchably connected to the gain stage during power-up operations. The bias stage reduces a power-up time associated with the gain stage, while minimizing current consumption in the next amplifier stage and improving battery life. For example, during power-up, the bias stage may enable the output voltage of the gain stage to gradually rise from a ground potential to a desired common mode level in a highly controlled and predictable manner. By preventing “glitches” in the output voltage, the bias stage eliminates the need for inserting switches in the signal path between the output nodes of the gain stage and input nodes of the next amplifier stage.

The invention belongs to the field of metallurgy, and specifically relates to an external refining method for smelting a ferrovanadium alloy. The invention aims at providing an external refining method for smelting ferrovanadium, with regard to problems of a high vanadium content, high power consumption, serious electric furnace body erosion and the like in slag in a last smelting period of an existing ferrovanadium smelting method adopting a multi-period method. The method comprises two-period electric furnace smelting, a primarily-molten alloy after deslagging is cast in an ingot mould filled with a refining material and subjected to a mixing reaction after the smelting is completed, and external refining is carried out. The method is capable of greatly reducing a single-furnace power-on time, reducing furnace lining erosion of an electric smelting furnace, and prolonging an alloy deposition time, thus increase for an alloy yield is benefited, and remarkable social and economic benefits are achieved.

The present invention discloses a self-checking method and a device for the active short-circuit protection circuit of a motor control system. The self-checking method for the active short-circuit protection circuit comprises the steps of controlling a multi-phase bridge type circuit, wherein an upper half-bridge corresponding to a first-phase winding and a lower half-bridge corresponding to a second-phase winding are switched on, while all other phase windings are not switched on; sampling the current of each phase winding multiple times, and conducting the split-phase accumulation; if the current cumulative sum of the above two correspondingly switched-on phase windings meets an approximation condition and the current cumulative sum of all the other phase windings is approximately zero, conducting the next detection until all upper and lower half-bridges of the multi-phase bridge type circuit are already detected once; if the current cumulative sum of the above two correspondingly switched-on phase windings meets the approximation condition, passing the self-checking of the active short-circuit protection circuit. Based on the method and the device, circuit faults can be actively precluded. Therefore, the IGBT burnout condition of the motor and the controller of a finished automobile due to circuit faults can be prevented. Meanwhile, no external circuit is added, so that the cost is saved. The power-on time of the finished automobile is saved.

The invention discloses a quick refining process for an LF (ladle furnace), and relates to the technical field of ladle refining. The invention aims to provide a quick refining process for an LF, which has the advantage of short refining time, and can effectively improve the quality of molten steel and stabilize the composition of molten steel. The quick refining process for an LF comprises the following steps: A. deoxidizing steel discharged from a converter; B. in the converter steel discharging process, washing slag, and adding molten steel into a refining ladle; C. pouring 0.5-1.5t of 2.5-3t of residual steel slag from the previous furnace steel subjected to continuous casting onto a slag pan, and pouring the rest steel slag into the refining ladle of the LF; and D. moving the refining ladle to a refining position, feeding 0.5-0.7kg of aluminum wire to every one ton of molten steel while blowing argon at a low rate of 20-50 NL / minute, adding 4.4-6.0kg of lime to every one ton of molten steel for 1.5-3 minutes while blowing argon at a high rate of 200-300NL / minute and stirring, immediately adding 1.2-2kg of aluminum ash to every one ton of molten steel to deoxidize the ladle slag after finishing adding the lime, and electrifying for 5-8 minutes to obtain white slag.

The invention provides a bistable solenoid valve, which consists of a valve body and a solenoid coil. The solenoid coil comprises a coil component, a magnetic conductor and a permanent magnet, wherein the coil component comprises a coil frame and coil windings wound on the coil frame; a knife edge-shaped part of the coil frame is provided with a plurality of inserts; and thread ends of the coil windings are led in or out of the inserts. The bistable solenoid valve is characterized in that: at least two thread ends are led in or out of the inserts. The invention also provides a method for manufacturing the solenoid valve. In the coil structure of the solenoid valve, due to a double winding structure, a reverse device is not needed to be arranged in a control system, and the problem that the solenoid coil is complex to control in the prior art is solved, so that the control is relatively simple; meanwhile, due to respective control of double windings, the problem of heat generation of the coil in the using process is effectively solved; and compared with the prior art, the bistable solenoid valve can greatly reduce the conduction time of a single coil winding. Therefore, the temperature rise of the coil is reduced, the service life of the solenoid coil is prolonged, and the reliability of the solenoid coil is improved.

The invention discloses a power supply control method of an electric automobile. Based on the power supply control method, the states of a low-voltage power supply system and a high-voltage power supply system can be switched without being triggered by an event related to an ignition switch, and therefore power-on triggering without the ignition switch can be supported. The process that the high-voltage power supply system is switched to the preparation state reuses the triggering condition through which the low-voltage power supply system is switched to the start state so that synchronizationof switching of the high-voltage power supply system to the preparation state and switching of the low-voltage power supply system to the start state can be supported, and compared with the process that the low-voltage power supply system and the high-voltage power supply system are powered on in sequence, the power-on duration of the electric automobile can be shortened through the above synchronous switching. The power-off process similarly does not need to be triggered by the event related to the ignition switch. In addition, a low-voltage power supply emergency backup can be achieved in alow-voltage power source switching mode, so that the reliability of low-voltage power supply is improved.

The invention provides a touch screen protection method and a mobile terminal. The method comprises the steps that the current placing state of the mobile terminal is detected; when the mobile terminal is placed in the state that a touch screen is arranged on a conducting object in a downward facing mode, power supplying to the touch screen is stopped, or the scanning frequency on the touch screen is modulated to a second frequency value from a first frequency value, wherein the first frequency value is larger than the second frequency value. According to the touch screen protection method, the condition that the touch screen is damaged by static electricity to be failed can be effectively avoided.

The invention discloses a multi-configuration module device and an auto-configuration method. The multi-configuration module device comprises a processor, a configurable module and a configuration information storing device. After the device is electrified, the processor automatically reads configuration information stored in the configuration information storing device and the configuration information is used as the information of the configurable module for the initial configuration of the device. With the completion of the power-up initialization, the device enters into the mode of normal operation in virtue of the configuration information. And then, an auto-configuration module carries out actual configuration detection to check the configuration information read from the configuration information storing device. When the information of the configurable module for the device is matched with the configuration information from the configuration information storing device, the correctness of the used configuration information is confirmed and the normal operation mode of the device is also confirmed, so the device can continue working normally. The configuration method adopted by the invention is that the configuration information is used firstly and confirmed thereafter, so the multi-configuration module device does need to spend additional time on checking the actual configuration of a hardware module, thus greatly shortening the time of the power-up initializing routine for software. So the multi-configuration module device is especially applicable for a plug-in module device that places strict restrictions on the power-up time.

The purpose of the present invention is to improve the usability of the kitchen waste disposer by enabling the user to select the stirring control method. The kitchen waste disposer of the present invention includes: a kitchen waste storage container 1 for storing kitchen waste, a heating device 3 for heating the kitchen waste in the kitchen waste storage container 1, and a device for indirectly or directly detecting the temperature of the kitchen waste. A dry sensor 5 , a stirring device 2 for stirring the kitchen waste in the kitchen waste storage container 1 , and a switching device 12 for the user to change the stirring frequency of the stirring device 2 . Therefore, the garbage can be dried according to the user's requirements to form a processing product that meets the requirements.

The invention provides a special switching power supply for a high current pulse LED (Light Emitting Diode). The special switching power supply for the high current pulse LED comprises an AC-DC (Alternating Current-Direct Current) converter, a PFC (Power Factor Correction) functional circuit, a constant current / constant voltage circuit and a PWM control circuit, wherein an LED is connected to an output end of the constant current / constant voltage circuit in series; the special switching power supply for the high current pulse LED also comprises a field-effect transistor, a photodiode and a thermoelectric couple, wherein the field-effect transistor is connected to the output end of the constant current / constant voltage circuit in series and connected with a PWM (Pulse Width Modulation) control circuit via a wire; a brightness and temperature signal of the LED light can be reflected by the photodiode and the thermoelectric couple and transmitted to the PWM control circuit. According to the invention, higher transient intensity of the LED is obtained through an alternate on-off mode of setting pulse width to adjust PWM reference current or voltage to be a plurality of times larger than a conventional working value; the power-on time within unit time is reduced without reducing the average luminous flux of the LED so as to reduce the heating of the LED chip without power; and the luminous efficiency of the LED in the power supply driving direction is increased.

The invention provides an energization control method of a battery cabinet for charging and discharging a lithium ion battery. The energization control method is characterized by comprising the following steps of (a) acquiring a voltage value of each battery cabinet needed to be energized; (b) grouping each battery cabinet in a mode that the battery cabinet with voltage difference smaller than a preset threshold by 20-40V is divided in a group; (c) controlling a voltage pressure value between each battery cabinet group and a busbar according to a voltage sharing mode, and sequentially connecting the battery cabinet group with minimum difference value between an average voltage and a busbar voltage in each battery cabinet group to the busbar; and (d) simultaneously charging and dischargingeach battery cabinet connected to the busbar.

A thermal printer comprises: a ROM 11 for storing a heat history correction table; a RAM 12 for storing the density-related energizing time data for the first and second preceding lines printed immediately before the current line to be printed and the density-related energizing time data before a correction for the current line to be printed which includes a target dot T; and a control section for comparing the density-related energizing time data for the first and second preceding lines and the density-related energizing time data before a correction for both adjacent dots T1 and T2 of the target dot T with the density-related energizing time data before a correction for the target dot T to select reference data, and further for performing a corrective operation for the pre-correction energizing time data for the target dot T using thus selected reference data to calculate energizing time data for the target dot T to be printed, whereby it is possible to prevent the temperature of a thermal head from being reduced excessively.

The invention relates to a welding method for diamond abrasive particles, which is characterized by comprising the following steps of: selecting diamond subjected to vacuum micro-evaporation titanizing, and nickelizing on the surface of the diamond to form a composite plating layer; and putting the diamond abrasive particles with the composite plating layer on a substrate, and performing pressurizing and discharge welding on the diamond abrasive particles and the substrate by using an electrode for a small-scale spot-welding machine. Titanium on the diamond abrasive particles subjected to composite plating is in firm chemical bonding with the diamond first, and when nickel subjected to the composite plating is welded, inner layers of the diamond abrasive particles are in diffusion bonding with the titanium, and the nickel on outer layers is welded with the substrate easily, so that the control strength of the substrate on the diamond abrasive particles is high.

The present invention discloses a method used for shortening the sintering time of the refractory material of an electric furnace when a novel furnace is opened. Before the production of the first furnace of the newly opened furnace, a layer of petroleum coke recarbonizer is spread uniformly on the ramming material that has been arranged on the slope of the bottom of the furnace. The method can shorten the sintering time of the refractory material of the electric furnace when a novel furnace is opened, save the energy consumption of the electric furnace, and improve the quality of electric steelmaking. At the same time, the method ensures the excellent sintering effects of the refractory material on the bottom of the furnace, and prolongs the service life of the refractory material.

The invention provides a motor-driven energy-saving four-way reversing valve with a compact structure and lower production cost. The motor-driven energy-saving four-way reversing valve comprises a synchronous motor and a cam piece driven by the synchronous motor; a first location switch and a second location switch are arranged close to the cam piece; the cam piece is provided with a cam which makes the on-off state of the first location switch always opposite to that of the second location switch and making the on-off states of the first location switch and the second location switch simultaneously changed once when the cam piece rotates 1 / 4 cycle; a contact at one end of the first location switch is electrically connected with a heating supply line; a contact at one end of the second location switch is electrically connected with a refrigerating supply line; a contact at the other end of the first location switch and a contact at the other end of the second location switch are electrically connected with one electrode of the synchronous motor; and the other electrode of the synchronous motor is electrically connected with a common line. The motor-driven energy-saving four-way reversing valve has the advantages of short power-on time, high action reliability, simple structure, simplified assembling process, low cost and the like.

The invention provides a motor driven four-way reversal valve which has the advantages of compact structure and lower manufacturing cost. The four-way reversal valve comprises a synchro motor and a cam member driven by the synchro motor, wherein the rotating angular velocity of the cam member is same to that of a reversing rotor, and a location switch with a normally open contact, a normally close contact and a public contact is arranged nearby the cam member; the cam member is provided with a cam used for leading the location switch to act and allowing the work position of the location switch to change once when the cam member rounds one-quarter circumference; when the reversing rotor is located in a heating position, the contact which is just switched to be disconnected with the public contact on the location switch is a heating contact, and the other contact is a refrigerating contact; and the heating contact is conducted with a heating supple line, the refrigerating contact is conducted with a refrigerating supple line, the public contact is conducted with one electrode of the synchro motor, and the other one electrode of the synchro motor is conducted with a concentric line. The four-way reversal valve provided by the invention has the advantages of short conduction time, high motion reliability, simple structure, simplified fitting process, lower cost and the like.

The invention discloses a variable exchange transmission address offline distribution method of an embedded device. The method comprises: establishing a visual page by graphical elements, extracting cross-page connection information among plug-ins of the device, to form an output-input list used for signal exchange among the plug-ins; with the plug-in as unit, distributing variable transmission addresses in an offline manner, to form a plug-in configuration text, recording output variable address and input variable related address information; after the configuration text is downloaded to the device, a plug-in system boostrap program analyzing the address information, in a periodic task, variable values being refreshed to corresponding bus transmission addresses, to complete variable exchange. The method can greatly reduce power-on time of the embedded device, and improves volume production efficiency.

The invention discloses a program and identifier information processing method, apparatus and system. The system comprises an upper computer used for sending a program updating command, and a slave board connected with the upper computer through a bus and used for making a response to the program updating command, judging whether a preset condition is met or not, communicating with the upper computer if the preset condition is met, performing program updating, receiving identifier information sent by the upper computer after communicating with the upper computer, and storing the identifier information. The technical problem of low processing efficiency of a program and identifier information processing method due to incapability of realizing synchronous program and identifier information processing in the prior art is solved.

The invention relates to a switch cabinet multi-state switching method, which comprises the following steps of 1, distributing unit state codes; 2, setting a necessary switching condition for switching the unit state codes; 3, combining state code sequences; 4, comparing the state code sequences; 5, judging the switching condition; 6, executing the switching operation; 7, polling the switching operation. According to the method disclosed by the invention, in the process of executing the switching operation, the switching operation can be executed by only meeting the necessary switching condition without being executed step by step according to an operation order, so that multiple switching operations can be executed simultaneously, the switching speed is obviously improved, a good deal of electrified time is saved, power restoration is performed as soon as possible, and the method has an important significance in reducing power failure loss.