1170 results about "Transfer switch" patented technology

A method operable by a controller of a static transfer switch (STS) is provided. The STS includes first and second inputs selectively coupled with first and second power sources via first and second circuit breakers, respectively, an output coupled with a load, first and second bypass breakers selectively coupling the first and second inputs, respectively, with the output, at least one removable power stage module including first and second power stages configured to conduct electrical power when active, first and second contactors selectively coupling the first and second inputs with the first and second power stages, respectively, and a load switch selectively coupling the first and second power stages with the output. The method includes modifying an operating state of the first and second contactors and the first and second power stages to implement a bypass operation and an un-bypass operation of the STS in response to a trigger condition.

The invention discloses a multi-stage collaborative protection simulation verification method for a subway power supply system, and the method comprises the steps: building an integrated simulation model which comprises an automatic reclosing switch, a spare power automatic switching switch and an automatic change-over switch based on an MATLAB / Simulink platform, and especially carrying out the precise modeling of an advanced compensation function of ATSE. The model is verified by a power-off test, a simulation result and actually measured data are highly consistent in voltage recovery time, an error of advanced compensation action time of ATSE is less than 2ms, and dynamic characteristics of an actual system are accurately reproduced. Model simulation shows that the advanced compensation strategy of the ATSE can effectively control the voltage sag amplitude within 15%, the power supply reliability of the system is remarkably improved, and through strict'simulation-actual measurement 'double-track verification, the model accurately reproduces the dynamic characteristics of the actual system, and shows remarkable advantages in the aspect of improving the power supply reliability.

The invention discloses an in-situ automatic calibration system and method for a multi-channel temperature acquisition instrument. The system comprises a metering port, a change-over switch, an upper computer, a multi-channel change-over switch and a standard signal source. The metering port is connected with the multi-channel change-over switch and is used for calibrating the temperature acquisition instrument; the change-over switch is connected with the acquisition circuit board and is used for switching a measurement mode and a calibration mode, in the measurement mode, the acquisition circuit board is connected with the measurement port, and in the calibration mode, the acquisition circuit board is connected with the metering port; the multi-channel change-over switch performs channel switching under the control of the upper computer, the standard signal source is connected with the multi-channel change-over switch and is used for outputting a preset standard electric signal to the metering port, the acquisition circuit board acquires the electric signal and converts the electric signal into a digital signal, and the master control digital board processes the digital signal and transmits the digital signal to the upper computer. According to the invention, a metering calibration function is added on an original temperature acquisition instrument, so that on-site rapid calibration of the multi-channel temperature acquisition instrument can be realized.

A static transfer switch (STS) system for transferring power between power sources is provided. The STS system includes first and second alternate-current (AC) switch assemblies. The first AC switch assembly includes a first current interrupter, and a first controller configured to control the first current interrupter. The second AC switch assembly includes a second current interrupter, and a second controller configured to control the second current interrupter. The first AC switch assembly and the second AC switch assembly are in communication with one another and are each configured to monitor an output power to the load, the first power source, and the second power source and transfer power when disturbance is detected in the output power, the first power source, and / or the second power source.

The invention discloses a multi-port direct current change-over switch based on a controllable negative voltage source, and belongs to the technical field of power equipment. Comprising X (X = 5 or 3) main branches, a commutation branch and X groups of controllable conduction switches, each main branch is composed of a through-flow vacuum switch, and the commutation branch is composed of a controllable negative voltage source and a square wave resonance direct current circuit breaker which are connected in series. The five main branches of the sending end are connected with a sending end positive pole rectifier and the like, and the three main branches of the receiving end are connected with a receiving end positive pole rectifier and the like and are all connected with the commutation branch through a controllable conduction switch. The controllable negative voltage source is formed by connecting a double-thyristor branch circuit and a negative voltage source in parallel, and the square wave resonance direct current circuit breaker comprises a temporary through-flow branch circuit and the like. The vacuum switch is used for replacing an SF6 switch, so that the switch is good in environmental protection property; the converter branch and the lightning arrester are shared, so that the use of high-price equipment is reduced, and the cost is reduced; a controllable square wave voltage source is utilized to excite high-frequency oscillation of an LC branch, and the element size is reduced; and rapid transfer of current in different directions can be realized, and the system response speed is improved.

The invention discloses a starting and stopping method for mine production line equipment. The starting and stopping method comprises the following steps: performing interlocking control and protection on electrical equipment from coarse crushing to finished product stacking and bulk packaging according to a reverse-sequence starting and sequential stopping principle; the material level is monitored through a material level sensor installed on the ore storage bin; fault shutdown and interlocking protection are implemented, and real-time state monitoring is carried out on each device; an in-situ starting cabinet or an in-situ control box is arranged beside each device, and a remote / in-situ control change-over switch is arranged; the operation condition of the equipment is monitored through a special liquid crystal display or an HMI (Human Machine Interface) of a PLC control level; the centralized control platform displays pictures, performs online monitoring on equipment data, monitors the temperature, the load and the rotating speed of the equipment, and triggers an alarm for the equipment of which the monitoring data exceed a normal range. The invention aims to realize automatic start-stop control of mine production line equipment so as to improve the efficiency, safety and reliability of mine production.

The invention provides a control system of a snow removal shovel, which belongs to the technical field of snow removal equipment and comprises a hydraulic system and an electric control system. The hydraulic system comprises a lifting and descending oil cylinder, a left-right swing oil cylinder, a hydraulic oil tank and an oil pump connected with the hydraulic oil tank, wherein the lifting and descending oil cylinder and the left-right swing oil cylinder are connected with the snow shovel. An inlet and an outlet of the lifting and descending oil cylinder are connected with an oil return opening of the oil pump and an oil return opening of the hydraulic oil tank through first circulation pipelines respectively. A first electromagnetic directional valve is arranged on the first circulating pipeline; an inlet and an outlet of the left-right swinging oil cylinder are respectively connected with the oil pump and an oil return port of the hydraulic oil tank through a second circulating pipeline; a second electromagnetic directional valve is arranged on the second circulating pipeline; the electric control system comprises a power supply main switch, an ascending and descending switch, a left-right swing switch and a self-weight forced descending change-over switch, wherein the ascending and descending switch and the left-right swing switch are connected to the power supply main switch in parallel; the problem that in the prior art, the snow removing effect is poor due to the fact that the weight of a snow shovel is insufficient can be solved.

The invention discloses a steam sterilizer based on deep reinforcement learning and an intelligent control system, and belongs to the technical field of automatic control. In the intelligent control system, a first subtracter generates a sequence first error signal according to an actually measured temperature provided by a temperature sensor and a set temperature; the second subtracter generates a sequence second error signal according to the actually measured air pressure provided by the pressure sensor and the saturated air pressure of the water vapor determined by the set temperature; the deep reinforcement learning module generates a first state according to the sequence first error signal, generates a second state according to the sequence second error signal, and generates control strategies of the first PID controller and the second PID controller according to the first state and the second state; generating a control strategy of the electronic change-over switch according to the second error signal; the first PID controller controls the working state of the steam generator; and the second PID controller selects the electric control air inlet valve or the first electric control exhaust valve through the electronic change-over switch. Saturated steam can be ensured to participate in sterilization, and the sterilization effect is good.

The invention discloses a high-efficiency UPS (Uninterrupted Power Supply) management system for well logging, and belongs to the technical field of power management. The system comprises a rectifier, a charger, a storage battery pack, an inverter, a change-over switch and a management module. The management module comprises an on-line monitoring unit, a power supply controller and a driving circuit, and the on-line monitoring unit collects UPS power supply operation state parameters in real time; the power supply controller receives and processes the parameters, and generates a control instruction according to a preset threshold value; and the driving circuit converts the control instruction into a driving signal and accurately controls the working state of the inverter. Wherein a signal conditioning circuit is arranged between the sensor module and the data acquisition unit and can perform enhancement and noise reduction processing on an analog signal output by the sensor. The driving circuit effectively resists well logging environment interference through cooperative work of an instruction amplifier, a photoelectric coupler and a field effect transistor, stable operation of a UPS power supply system is guaranteed, accurate control over the working state of an inverter is achieved, and it is ensured that stable and reliable electric power supply is provided for well logging equipment.

The utility model relates to the technical field of change-over switches, and discloses an isolation type change-over switch, which comprises a shell, an operating handle arranged on the shell, a mounting hole arranged on the operating handle, handle shafts arranged at two ends of the mounting hole, a spring I fixedly arranged in the mounting hole and between the two handle shafts, and an arc groove arranged below the operating handle, an arc groove is formed in the shell, a connecting rod is slidably arranged in the arc groove, a moving contact assembly is fixedly arranged below the connecting rod, two moving contacts are installed in the moving contact assembly, and two static contact assemblies are fixedly arranged in the shell. The positions of the two moving contacts are locked through the single second spring, the moving contacts are prevented from loosening easily, when the moving contacts are communicated with the static contacts, the second spring assists in pressing the moving contacts, if the arc groove drives the moving contacts to be separated from the static contacts, the moving contacts and the static contacts are separated in time, adhesion is not prone to occurring, the arc groove is connected with the connecting rod in a sliding mode, and the connecting rod is not prone to falling off. The transmission process is not blocked, the operation smoothness is high, the assembly operation is simple and convenient, and the segmentation efficiency of the moving contact is improved.

The utility model discloses a three-position dual power conversion switch, comprising a conversion shaft arranged on a shell and two spring members arranged between the conversion shaft and the shell, two installation slide grooves connecting the two spring members are arranged on the shell, the two spring members respectively have first end feet slidably connected in the two installation slide grooves, and second end feet extending and connected to the conversion shaft, when the conversion shaft switches between a first position, a second position and a third position, the first end feet of the two spring members are driven to move and adjust positions in the two installation slide grooves respectively, and a force is applied to the conversion shaft to keep it in the first position, the second position or the third position through the two spring members, and the dual power conversion switch can disconnect the normal power supply and the standby power supply in the third position to achieve the purpose of dual separation, and the dual power conversion switch has a simple operating structure, low cost, reliable and in-place operation switching, and improved product performance.

An electrical device (100), such as an automatic transfer switch or an electrical power distributor, comprises: a first electrical power input (101); a second electrical power input (102); an electrical power output (121, 122, 123); a switching circuit (105) operable to route electrical power from the electrical power inputs to the electrical power output; the switching circuit comprising: a first switching element (111) to allow, when enabled, power flow from the first electrical power input to the electrical power output; and a second switching element (112) to allow, when enabled, power flow from the second electrical power input to the electrical power output; a controller (110) operable to control the switching circuit to switch to the first electrical power input or the second electrical power input for selecting which of said electrical power inputs is to supply electrical power at the electrical power output; wherein the electrical device is operable to determine a timing sequence of switching between the first electrical power input and the second electrical power input.

A dual power switching system selects a first power source or a second power source to supply power to a load coupled to an inductive device. The dual power switching system includes a first thyristor, a second thyristor, a third thyristor, a fourth thyristor, and a controller. The controller calculates a total magnetic flux according to a current magnetic flux of the inductive device and an expected magnetic flux of the second power source. When the power-supplying source is switched, the controller turns off the first thyristor and the second thyristor, and determines whether a commutable time is reached according to a power parameter of the first static transfer switch and the second static transfer switch. When the commutable time is reached, the controller correspondingly turns on at least one of the third thyristor and the fourth thyristor according to the total magnetic flux being less than a threshold.

Combined charging / discharging circuit with an energy storage terminal (A+, A-), an energy source terminal (PE, NE), a resistor (R), a series switch (L), a cross-switch (Q), and a controller (C) which is drivingly connected to the series switch (L) and to the cross-switch (Q), which together are designed as a changeover switch, wherein the resistor (R) connects a first potential (A+) of the energy storage terminal to a connection point (P) at which the series switch (L) and the cross-switch (Q) are connected to one another, the series switch (L) in a pre-charging state connects the resistor (R) to a first potential (PE) of the energy source terminal (PE, NE), and the cross-switch (Q) in a discharging state connects the resistor (R) to a second potential (NE) of the energy source terminal (PE, NE), wherein the controller is configured to set the pre-charging state (L1, U1) or the discharging state (Q2, U2),wherein the longitudinal switch (L) and / or the transverse switch (Q) in a connection state connects the first potential (PE) of the energy source terminal (PE, NE) to the first potential (A+) of the energy storage terminal, bypassing the resistor (R), wherein the controller is configured to establish the connection state.

The embodiment of the present invention provides a portable integrated detection, launch and control device suitable for underwater vehicles, including: a main control board, which is used to realize the recording and storage of communication interaction content during the detection process, digital-to-analog conversion of input analog signals, isolated input and output of switch quantities, and conversion of communication interfaces; a distribution board, which is used to control power conversion and output, and isolate and convert analog signals of the controlled distribution power supply including at least voltage and current, the distribution board is connected to the main control board to provide the main control board with sampling required for judging the working state of the distribution power supply; a human-computer interaction panel, which is used for human-computer interaction and information interaction; an air-cooled heat dissipation system, which is installed below the vent of the human-computer interaction panel; the above-mentioned device is installed in an integrated three-proof chassis, and the cavity of the integrated three-proof chassis is divided into two areas of air inlet and air outlet by a baffle plate, and an air duct is formed inside the three-proof chassis to discharge the heat of the distribution board and the main control board.

The utility model discloses a novel dual-power multi-standby plug-in low-voltage switch cabinet, which comprises a base, a bus coupler cabinet mounted in the middle of the top end of the base, a first wire inlet cabinet mounted on one side of the top end of the base, and a second wire inlet cabinet mounted on the other side of the top end of the base, drawer type circuit breakers are installed in the middle of the bus coupler cabinet, the middle of the first wire inlet cabinet and the middle of the second wire inlet cabinet respectively, a change-over switch is installed on one side of the top of the front face of the bus coupler cabinet, an automatic switching microcomputer is installed on the other side of the top of the front face of the bus coupler cabinet, and two wire outlet drawers are installed at the bottom of the first wire inlet cabinet and the bottom of the second wire inlet cabinet respectively. According to the novel dual-power-supply multi-standby plug-in low-voltage switch cabinet, the two wire inlet cabinets and the bus coupler cabinet of the low-voltage switch cabinet adopt electrical interlocking to ensure that the three wire inlet cabinets and the bus coupler cabinet cannot be switched on at the same time, and a standby power automatic switching microcomputer and a change-over switch are additionally arranged on the contact cabinet to realize three switching functions of standby power automatic switching, manual operation and stopping.

The utility model discloses a 400V station service power switching and diesel generator remote automatic input system for a hydropower station, and belongs to the field of power switching. The utility model aims to solve the problem that manual closing of plant diesel generator power supply equipment is easy to cause accidents. The first power supply end is connected to a movable contact of a first dual-power-supply change-over switch through a first circuit breaker, a first transformer and the other end of a first isolation disconnecting link in sequence, a static contact of the first dual-power-supply change-over switch is connected with a 400 V bus, and the other movable contact of the first dual-power-supply change-over switch is connected with a static contact of a second dual-power-supply change-over switch. One movable contact of the second dual-power change-over switch is connected with a second power supply end through a second isolation disconnecting link, a second transformer and a second circuit breaker in sequence, and the other movable contact of the second dual-power change-over switch is connected with the diesel generator through a third isolation disconnecting link; one phase of phase voltage is randomly selected from the 400V bus to be connected to the voltage input end of the diesel generator starting circuit; and detecting whether the 400V bus is electrified or not, and judging whether to control the diesel generator to start or not. The method is used for automatically switching power supply.

The present invention discloses an operating mechanism of a multi-connection conversion switch, comprising a rotating handle, a central operating shaft and a transmission operating shaft, wherein a driving crank arm is provided on the central operating shaft, the driving crank arm is provided with a driving part, a driven crank arm is provided on the transmission operating shaft, the driving part and the driven crank arm are provided with a transmission structure, and the transmission structure comprises a motion guide groove and a push block structure, during the rotation process, the driving part on the driving crank arm drives the driven crank arm and the transmission operating shaft to rotate simultaneously through the cooperation of the motion guide groove and the push block structure, so that the rotating handle can drive the central operating shaft and the transmission operating shaft to rotate together, and multiple groups of universal conversion switches execute closing or opening actions at the same time. The advantage of such a design is that the customer can disperse the multiple groups of circuits that need to be controlled on the multiple groups of universal conversion switches, thereby avoiding the problem of the universal conversion switches being too long, the transmission distance of the central operating shaft and the transmission operating shaft is small, the structural strength is high, the transmission is reliable, and the action consistency is good.

The present inventive concepts comprise a connected, intelligent transfer switch system that permits remote metering, monitoring and control of energy sources connected to a device both by hardwired and wireless connection, and the method for operating this system is disclosed. The inventive concepts represent a significant improvement upon existing transfer switch systems by incorporating advanced monitoring and control capabilities of all energy resources connected to a building, such as fossil-fuel powered generators, battery storage systems, solar photovoltaic arrays, wind turbines, utility grid connections, controllable loads, or other technologies which generate, store or consume energy. The inventive concepts further provide means for flexible and intelligent operation of these resources through a dedicated network communication connection which enables advanced operational decision-making to determine optimal switching actions and real-time interaction through user-facing digital interfaces.

The utility model relates to a toxic gas detection simulation and exhaust device based on an underground goaf. The device comprises a detection simulation assembly and an exhaust assembly which are connected, and is structurally characterized in that the detection simulation assembly comprises a detection simulation host, a four-in-one gas detector and an audible and visual alarm, and the exhaust assembly comprises an exhaust fan and an exhaust pipe. The four-in-one gas detector, the audible and visual alarm and the exhaust fan are all in circuit connection with the detection simulation host, the exhaust fan is in pipeline connection with one end of the exhaust pipe, and the detection simulation host is provided with a host cover plate used for shielding the button. The detection simulation host comprises a main control board, a contactor, a change-over switch, an inverter, a battery, an ampere meter, a red button, a green button and a female interface, the contactor, the battery, the ampere meter, the red button, the green button and the female interface are all connected with the main control board, the change-over switch is respectively connected with the inverter and AC220V, and the inverter is connected with the battery.

In one aspect, a transfer switch configured to operate in different transfer modes is provided. The transfer switch includes first and second inputs, first and second contactors, an output, first and second power stages, and a controller. The first and second inputs are configured to couple with first and second power sources, respectively. The first and second contactors are configured to selectively couple with the first and second inputs, respectively. The output is configured to couple with a load. The first and second power stages are configured to conduct electrical power when active. The controller is configured to determine whether a trigger condition has occurred while the first power stage is active, and in response thereto, to open the first contactor and activate the second power stage to transfer the load from the first power source to the second power source.

The invention belongs to the technical field of dual-power-supply switch boxes, and particularly relates to a dual-power-supply switching box which comprises a box body and a static change-over switch installed in the box body, flame-retardant partition plates and a cover plate are further installed in the box body, and the two flame-retardant partition plates are arranged side by side and used for dividing the inner space of the box body into three unit cavities; wiring assemblies used for allowing cables to penetrate through penetrate through the unit cavities, the cover plates are arranged at openings of the unit cavities, rubber films and butt clamps penetrate through the cover plates, the two butt clamps are arranged in pairs, and an elastic rope and a fire extinguishing bottle are arranged between the two butt clamps. During maintenance, the butt clamp is pulled by the elastic rope to clamp the wiring assembly so as to hang the cover plate and cover the unit cavity, so that external moisture is blocked. The three unit cavities are separated and sealed through the cover plates, each unit cavity is opened during maintenance, all switches are prevented from being exposed in a humid environment, the overall humidity resistance is improved, and the cover plates automatically fall off and are opened for heat dissipation by loosening the butt clamps during thermal runaway.

The invention relates to a coupled inductor current-limiting type hybrid direct-current circuit breaker topology and a working method. The coupled inductor current-limiting type hybrid direct-current circuit breaker comprises a current-carrying part and a breaking part, the current-carrying part is formed by connecting an ultra-fast mechanical switch UFD and a load change-over switch LCS in series, the breaking part comprises a bridge circuit, a first branch circuit, a second branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit and a sixth branch circuit, the fourth branch circuit is formed by connecting a thyristor, a coupling inductor and a primary side inductor in series to form a current-limiting branch circuit, and the fifth branch circuit is formed by connecting a secondary side inductor and a secondary side inductor. The sixth branch is formed by connecting a secondary side inductor of a coupling inductor with a thyristor in series and then connecting the secondary side inductor with a capacitor in parallel; the current limiting of the fault current is realized through the fourth branch, the fault breaking of the primary side inductor of the coupling inductor of the fourth branch is completed through the coupling effect of the secondary side inductor of the coupling inductor of the sixth branch, the peak value of the fault current is obviously reduced, and the breaking time is obviously shortened; the circuit breaker can quickly respond to faults of three working modes of current limiting breaking, reclosing and small current breaking; and the breaking part of the circuit breaker adopts the thyristors instead of the IGBTs, so that the cost of the circuit breaker is reduced.

An automatic transfer switch is provided. A transfer module is arranged between two power switches and disposed on a displacement mechanism which is in linear motion. The transfer module is provided with a seat in which two corresponding levers are mounted and electrically connected with a controller. The two levers are locked or released under control of the controller. Thereby the power switch is pulled or pushed selectively by the levers being locked or released. In combination with the controller used for setting a time delay during transfer between power sources, the power switch can be turned on / off or switched at the time required.

The technology relates to a method of provisioning power and a switching device or a system implementing such method. The method may include providing a switching device including an automatic transfer switch module, an electronic bypass module in electrical communication with said automatic transfer switch module, a plurality of inlets, and a plurality of outlets. The inlets are connected to different power sources to provide uninterrupted power to the plurality of outlets. The method may also include continuing to provide uninterrupted power upon disconnection of either the automatic transfer switch module or the electronic bypass module from the switching device.

The invention relates to a load transfer switch (1) for a load tap changer (2), comprising at least one vacuum interrupter (30), a handling element (50) which is mechanically connected to the vacuum interrupter (30) on a first end (51) and has a roller (53) on a second end (52), a handling body (10) which has a base body (11) and at least one cam (20), wherein the vacuum interrupter (30) is handled via the handling element (50) by the roller (53) being driven over the handling body (10), at least one part (21) of the cam (20) having a higher strength than the base body (11).

The invention relates to a load tap changer (10) for switching over between winding taps (N1,..., N J ,..., N N ) of a regulatable transformer (1) without interruption, comprising at least one selector unit (30) for preselecting to a selected winding tap (N J ) without power, at least one load switching unit (40) for actually load switching from a previous winding tap (N J _i) to the preselected winding tap (N J ), at least one gear mechanism (50) with a first gear wheel (31) and a second gear wheel (41), wherein the first gear wheel (31) is assigned to the selector unit (30) and the second gear wheel (41) is assigned to the load switching unit (40), a drive shaft (60) which is actuated by a motor drive (70), the first gear wheel (31) and the second gear wheel (41) are directly in mechanical action connection with each other, so that the gear wheels (31, 41) can be actuated simultaneously, the drive shaft (60) can drive the first gear wheel (31) or the second gear wheel (41).

The utility model discloses a multifunctional relay protection short-circuit device, which comprises a change-over switch, a test wire connected to one end of the change-over switch and a test wire connector connected in parallel to the other end of the change-over switch, a storage box for storing the test wire is arranged on the test wire, and a connecting disc is rotatably arranged in the change-over switch. Normally-open contacts are arranged in pairs around the axis of the connecting disc at equal angles, the edge of the connecting disc is connected with connecting pieces which are communicated with the normally-open contacts arranged in pairs, and the test wire connectors are communicated with the normally-open contacts. The effect of improving the short-circuit efficiency and safety of the relay terminal is achieved.

The present invention discloses a complementary starting method, system and device for a dual-host ship, which relates to the technical field of ship main engine starting. The complementary starting method for the dual-host ship includes the following steps: transfer switch simulation; obtaining stability operation indexes; complementary starting judgment. By monitoring the initial state of a specified ship in real time, then performing transfer switch simulation on the relay of the specified ship to judge whether to send a complementary starting instruction, if so, monitoring the operation condition of the main engine of the specified ship in real time to obtain stability operation indexes, and finally judging whether to send a complementary starting completion instruction based on the obtained stability operation indexes, if so, monitoring the change of the starting state of the main engine of the specified ship during the shutdown process in real time and visualizing it, the present invention achieves the effect of improving the operation stability of the main engine during the complementary starting process of the dual-host ship, and solves the problem of low operation stability of the main engine during the complementary starting process of the dual-host ship in the prior art.

The present application discloses an air-conditioning compressor control method, device, equipment, storage medium and air-conditioning system, which relates to the field of automatic control technology. The method is executed by a control device in an air-conditioning system, and the air-conditioning system also includes an air-conditioning compressor, an automatic transfer switch, and at least two power input ports; the automatic transfer switch is used to power the air-conditioning compressor through at least one of the two power input ports; the method includes: reading first power input status information and second power input status information; in response to the first power input status information indicating that the air-conditioning compressor has no power input, and the second power input status information indicating that at least two power input ports have no power output, when the air-conditioning compressor resumes power supply, controlling the air-conditioning compressor to perform emergency startup. The above scheme can take into account the service life of the air-conditioning compressor and the cooling effect after shutdown and restart by means of status detection and fault detection.