42 results about "Cascade control system" patented technology

The invention discloses a pinch roll gap cascade control system with an automatic calibration function. The pinch roll gap cascade control system comprises a hydraulic module, a detection module and an upper computer, the hydraulic modules are arranged on the two sides of the pinch roll device. The detection module is arranged on the hydraulic module; the upper computer is connected with the hydraulic module and the detection module. The invention further discloses a pinch roll gap cascade control method with the automatic calibration function. The invention provides a control system which is good in pinch roll gap adjusting effect and considers automatic calibration in the high-precision steel plate production process.

The invention discloses a system and a method for hydrogen production by cascade regulation and control of wastewater, and belongs to the field of electrochemistry, the system comprises a self-driven separator, a wastewater liquid inlet, a self-capture unit, a self-driven liquid upper layer, a self-driven liquid lower layer, an electrolytic bath and a component detector. By utilizing the self-driven liquid and cascade regulation, organic matters in the wastewater are subjected to phase splitting to the upper layer of the self-driven liquid, inorganic matters in the wastewater are subjected to phase splitting to the lower layer, and water molecules in the lower layer solution are migrated to an electrolyte in the self-capture unit, so that the organic matters and the inorganic matters in the wastewater can be completely isolated outside and are prevented from influencing the electrolyte; therefore, high-purity hydrogen can be obtained, and no corrosion or toxicity is caused to an electrolysis system.

A cascaded control system for coordinating and controlling carbon emissions associated with operating building equipment distributed across a plurality of subsystems includes a first controller configured to generate carbon emissions targets for each of a plurality of subsystems using a predictive control process that accounts for an aggregate carbon emissions of the plurality of subsystems predicted to result from the carbon emissions targets. The cascaded control system also includes a plurality of second controllers, each corresponding to one of the plurality of subsystems and configured to generate control decisions for building equipment of the corresponding subsystem that are predicted to cause the building equipment to achieve the carbon emissions targets for the corresponding subsystem; and operate the building equipment of the corresponding subsystem using the control decisions.

The invention relates to the technical field of carbon nanotube preparation, and provides a carbon nanotube fluidized bed temperature cascade control system and method, and the system comprises a main temperature cascade control subsystem and an auxiliary temperature cascade control subsystem which are composed of a stainless steel reactor, a reactor heating furnace body, a gas cabinet, a gas bag heating furnace body and the like. The main temperature cascade control subsystem forms closed-loop control through components such as a T reactor temperature control thermocouple and a TC main controller, so as to ensure that the basic temperature of the reactor is stable; and the auxiliary temperature cascade control subsystem controls the gas pocket heating furnace body through similar components so as to preheat gas to influence the temperature of the reactor. Feedforward control is further introduced into the system, a TC main controller collects temperature, voltage, flow and other data, predicts disturbance and adjusts a set value in advance, the heating power is adjusted through a reactor heating power regulator and an air pocket heating power regulator, and accurate control over the temperature of the reactor is achieved. According to the invention, the response speed and precision of temperature control are effectively improved, and the quality and stability of carbon nanotube production are guaranteed.

The utility model relates to LED lighting technical field discloses a layered controllable LED lamps and lanterns and cascade control system. The lamps and lanterns include casing and circuit board, and the circuit board integrates drive module, LED lamp set and power module. Drive module is connected with the distribution address code through single line communication bus series connection multiple LED drive chip, and the first chip is connected with external code writer and is distributed address code, and LED lamp set is equipped with multiple sections of addressable light emitting circuit, and each circuit contains RGB LED unit and is independently controlled current control. The power module guarantees power supply stability through filter unit. The casing is equipped with detachable assembly structure and limiting clamping groove. In the cascade control system, each lamps and lanterns is connected through chip pin and forms cascade link. The utility model realizes layered independent control, reliable signal transmission and accurate current drive, supports dynamic light effect, modular extension, solves the problems of insufficient control flexibility of traditional lamps and lanterns, poor signal transmission reliability and the like, and is suitable for advertisement decoration, stage lighting and the like scenes.

The invention relates to a method for operating an internal combustion engine of a motor vehicle, in which a cascade control system is used. In this system, a first quantity of air, the first quantity of which is introduced into a combustion chamber of the internal combustion engine, and a second quantity of fuel, the second quantity of which is introduced into the combustion chamber of the internal combustion engine, are controlled by means of two controllers (4, 5) of two nested control loops (2, 3). For a first controller (4, 5), a first correction value is determined, which characterizes a first control deviation (RA1) that is applied to the first controller (4). For a second controller (4, 5), a second correction value is determined, which characterizes a second control deviation (RA2) that is applied to the second controller (5).From the correction values ​​of the controllers (4, 5), a common adaptation value is determined, which is stored in a storage network common to the controllers.

The invention discloses a temperature reducing valve cascade control system and method based on an improved internal model-active disturbance rejection controller. The system comprises a first comparator, an internal model controller, the improved active disturbance rejection controller, a temperature reducing valve, a temperature sensor, a superheater, a temperature sensor and a fifth comparator which are sequentially arranged. According to the method, the main steam temperature control quality of transient working conditions such as peak regulation and frequency modulation of the thermal power generating unit can be remarkably improved; the improved ADRC is adopted in an inner ring of the cascade system to estimate and compensate disturbance in real time, and compared with PID control, the improved ADRC is more suitable for the complex multi-source characteristic of main steam temperature disturbance, and the anti-interference capability of the system can be improved; and internal model control is adopted in an outer ring of the cascade system, compared with PID control, the internal model control has a better control effect on the characteristics of large inertia and large delay of the main steam temperature, and the set value tracking performance of the system can be improved.

This invention discloses an automated monitoring and detection cascade control system for bioaerosols, comprising a cascaded monitoring and detection unit and an automatic control unit. The cascaded monitoring and detection unit includes: a first-level monitoring module, a bioaerosol monitor based on laser-induced fluorescence technology (aerosol fluorescent particle monitor); a second-level monitoring module, a bioaerosol live-cell monitor based on ATP fluorescence detection technology (aerosol live-cell ATP monitor); and a third-level detection module, a bioaerosol nucleic acid detector based on microfluidic PCR technology (an integrated bioaerosol detection and nucleic acid detection system). The automatic control unit uses high and low level switching signals to achieve sequential instantaneous triggering of the three levels of equipment, completing automated hierarchical monitoring and early warning of "broad-spectrum monitoring → biological confirmation → specific detection". This invention solves the problem in existing bioaerosol monitoring technologies that cannot simultaneously achieve broad-spectrum, real-time, accurate, and automated monitoring.

The present invention discloses a precise aeration control system and method for MBR process, including an on-line detection system, an ammonia nitrogen-dissolved oxygen PLC control system, a dissolved oxygen-biochemical air volume PLC control system and a biochemical air volume control system; through the synergistic effect of the on-line detection system, the ammonia nitrogen-dissolved oxygen PLC control system, the dissolved oxygen-biochemical air volume PLC control system and the biochemical air volume control system, a cascade control system is constructed with the effluent ammonia nitrogen control as the target parameter and the biochemical blower air volume as the control output, replacing the traditional cascade control system with the biochemical dissolved oxygen as the target parameter and the biochemical blower air volume as the control output, so as to fully consider the further degradation effect of the MBR membrane tank on pollutants and reduce the energy consumption of biochemical aeration.

The embodiment of the invention relates to the technical field of minimally invasive surgery robots, and discloses a cascade control system and method and a minimally invasive surgery robot. The system comprises a controller and a driver, wherein the controller comprises a speed planning module and a control module; the control module comprises a position ring and a speed ring; the driver comprises a current loop; the speed planning module is used for determining a planning position and a planning speed; the position ring is used for outputting a reference speed to the speed ring according to the planned position; the speed ring is used for determining a reference current according to the reference speed and the planned speed and transmitting the reference current to the driver; and the current loop is used for outputting current to a controlled motor according to the reference current. And at least some technical problems existing in single-layer impedance control and single-stage PI control in related technologies can be solved.

The application relates to a kind of linearity control method and system of fully mechanized working face based on cascade control system, the method comprises: main regulator obtains the target overall linearity of all scraper conveyors of fully mechanized working face set, and obtains the actual overall linearity of all scraper conveyors of fully mechanized working face obtained by main transmitter monitoring;Main regulator is segmented to target overall linearity and actual overall linearity respectively, and according to the target linearity of each section after target overall linearity segmentation and the actual linearity of each section after actual overall linearity segmentation determines the straightening target of each section scraper conveyor;Main regulator sends the straightening target of each section scraper conveyor to secondary regulator, to control the actuator corresponding to each section scraper conveyor to execute push action according to the straightening target of each section scraper conveyor through secondary regulator, and the displacement of hydraulic support push rod is monitored through corresponding secondary transmitter, improve the control accuracy of the linearity of fully mechanized working face.

The invention relates to a general control or regulation system, in particular to a reaction cavity pressure control method and device, electronic equipment and a storage medium, and the method comprises the steps: after the air pressure in a reaction cavity is reduced to a preset bottom pressure, a difference value between the current air pressure in the reaction cavity and a preset target air pressure is used as a reference; the opening degree of the first butterfly valve is adjusted, and the opening degree of the second butterfly valve is adjusted based on the opening degree of the first butterfly valve, so that a cascade control system for active control over the first butterfly valve and driven control over the second butterfly valve is formed, the opening degree changes of the first butterfly valve and the second butterfly valve are synchronous, and the situation that due to air flow changes, the air flow changes is avoided. The problem of film forming quality deviation caused by the fact that gas in the cavity cannot flow in the preset direction due to inconsistent opening angles caused by the fact that the two butterfly valves independently control the two exhaust pipelines respectively is solved, and the pressure stability in the reaction cavity is improved.

The present application relates to carbon nanotube preparation technical field, provide a kind of carbon nanotube fluidized bed temperature cascade control system and method, system includes by stainless steel reactor, reactor heating furnace body, gas cabinet and gas package heating furnace body etc. Main, vice temperature cascade control subsystem is formed. Main temperature cascade control subsystem is formed by T reactor temperature control thermocouple, TC main controller and other components closed loop control, ensure that reactor basic temperature is stable;Vice temperature cascade control subsystem is controlled to gas package heating furnace body by similar components, to preheat gas influences reactor temperature. System also introduces feedforward control, TC main controller collects temperature, voltage, flow and other data, predicts disturbance and adjusts set value in advance, adjusts heating power by reactor heating power regulator and gas package heating power regulator, realizes the accurate control to reactor temperature. The present application effectively improves the response speed and precision of temperature control, guarantees the quality and stability of carbon nanotube production.

The invention relates to a relay cascade control system and method for a grouped heavy haul train, and belongs to the technical field of cascade control, the relay cascade control system comprises a master control locomotive and a master control operation end ECP control device A in the master control locomotive, and a slave control locomotive and a slave control operation end ECP control device B and a slave control operation end ECP control device A in the slave control locomotive; a master control operation end ECP control device A sends a first message to a slave control operation end ECP control device B according to set train marshalling information, receives a second message returned by the master control operation end ECP control device A and then generates a relay reconnection result, and a master control marshalling and a slave control marshalling are initialized by combining the slave control operation end ECP control device A to obtain initialization results; and the master control operation end ECP control equipment A broadcasts an operation mode authorization instruction and sends a braking control instruction to the slave control operation end ECP control equipment A so as to control the slave control marshalling to execute braking or relieving operation, and reliable distributed cooperative braking control over the heavy-load marshalling train is achieved.

The invention discloses application of improved active disturbance rejection control in superheated steam temperature control of a supercritical thermal power generating unit. Firstly, a superheated steam temperature system of a supercritical unit serves as a research object, and the control difficulty of the superheated steam temperature system is analyzed; and then, designing an improved active-disturbance-rejection control strategy. And finally, verifying the feasibility of the control strategy based on a simulation platform, and carrying out quantitative statistic analysis on the effectiveness of the control strategy by adopting performance indexes. A research object is simplified into a cascade control system, and the dynamic characteristics of the cascade control system are described more accurately. According to the improved active-disturbance-rejection control strategy designed by the invention, the control quality of a superheated steam temperature system can be remarkably improved, and rapid, safe and stable control of the superheated steam temperature is realized.

The invention relates to the technical field of industrial automation and fluid conveying control, in particular to a PLC-based liquid level safety pipeline conveying cascade control system, which comprises a data acquisition module for generating fluid state information and extracting liquid level main loop characteristics, flow auxiliary loop characteristics and PLC scanning period characteristics; the elastic impedance modeling module is used for generating an impedance matching coefficient, an effective damping ratio and coherent response delay time; the compensation operator generation module is used for generating a decoupling elastic impedance control law; the actuating mechanism control module is used for determining a control instruction for the regulating valve actuating mechanism; the stability closed-loop correction module is used for calculating a control law stability index and correcting a nonlinear damping compensation operator; the problem of nonlinear instability of an executing mechanism under the small-opening-degree working condition is effectively solved, the invalid reciprocating action of the adjusting valve is greatly reduced, and the mechanical fatigue and overheating risks caused by high-frequency oscillation are avoided.

The present invention relates to the technical field of electrolysis cell control. Disclosed are a method and system for controlling a separator liquid level during hydrogen production by water electrolysis. In the present invention, the separator liquid level is used as a primary variable, and the make-up water flow rate is used as a secondary variable, forming a cascade control system. In addition, the change values of an electrolysis system pressure, electrolysis cell power, and an alkaline solution temperature are used as feed-forward signals and are respectively input into feed-forward controllers. Output values are summed and then used, together with the cascade control system, to form a feed-forward-cascade control system. The control method can achieve precise control of the liquid level on a hydrogen side and the liquid level on an oxygen side, thereby avoiding the problem of an excessive difference in liquid level between the hydrogen side and the oxygen side caused by changes in the system pressure, the electrolysis cell power, the alkaline solution temperature, and the make-up water flow rate, avoiding the problem of equipment damage and even personal injuries resulting from the risk of explosion due to mixing of gases on two sides when the liquid levels are too low, and avoiding economic losses caused by protective shutdown triggered by high or low liquid level alarms.

The application discloses a kind of robot motion control method and application based on real-time sensing of multiple ranging sensors, for the mechanical arm control of industrial robot, by controlling two-stage mechanical arm coordinated action to run to workpiece approximate measurement point, according to the real-time sensing posture and distance of workpiece of front ranging sensor, real-time control arm makes that front end execution head gradually approaches workpiece, reaches predetermined distance and starts suction cup to adsorb workpiece, arm switches to free mode, subsequently carries out measurement.The application realizes the real-time posture adjustment and distance control of mechanical arm execution head and measured workpiece by using the continuous point position control function of mechanical arm, combined with the front end distance sensing of execution head, so that the automatic coating quality detection of industrial detection robot on production line under the condition of complex large workpiece hanging swing state becomes possible, mechanical arm cascade control, system installation is simple and reliable, reduces the space occupation of motion module.

The utility model relates to an ultralow temperature test chamber cascade control system, which comprises a main controller and an auxiliary controller, the main controller is electrically connected with the auxiliary controller through a communication line, the main controller is connected with a high-precision sensor module, and the auxiliary controller is connected with an actuating mechanism; the main controller is connected with a refrigerant detection module and a fault diagnosis module, and the auxiliary controller is connected with an automatic alarm module. The executing mechanism comprises a compressor, a condenser, an electronic expansion valve, an evaporator and a gas-liquid separator; an outlet pipeline of the compressor is connected with an inlet pipeline of the condenser, an outlet pipeline of the condenser is connected with an inlet pipeline of the electronic expansion valve, an outlet pipeline of the electronic expansion valve is connected with an inlet pipeline of the evaporator, and an outlet pipeline of the evaporator is connected with an inlet pipeline of the compressor through the gas-liquid separator. According to the utility model, accurate control and stable adjustment of the internal temperature of the test box can be realized, real-time monitoring and fault diagnosis functions are realized, and abnormal conditions can be found and handled in time.

A cascade control system for coordinating and controlling carbon emissions associated with operating building equipment distributed across multiple subsystems includes a first controller configured to generate carbon emissions targets for each of the multiple subsystems using a predictive control process that accounts for aggregate carbon emissions of the multiple subsystems predicted to result from the carbon emissions targets. The cascade control system also includes a plurality of second controllers, each corresponding to one of the multiple subsystems, configured to generate control decisions for the building equipment of the corresponding subsystem that are predicted to cause the building equipment to achieve the carbon emissions target of the corresponding subsystem, and to operate the building equipment of the corresponding subsystem using the control decisions.

The application discloses a cascade control system and control method of a silicon carbide epitaxial device. The system comprises a PLC control module, a hardware interlock device, a host computer and a sensor. The PLC control module comprises an interlock processing module connected with an output mapping module and a signal output module. The host computer has an interlock processing module connected with a logic processing module and a signal output module. The PLC control module is electrically connected with the host computer through Ethernet or other real-time buses. The system adds a matching corresponding interlock processing module in the host computer and the PLC control module. The interlock logic of the interlock processing module is consistent with the interlock logic of the interlock processing module in the hardware interlock device. When the hardware interlock device fails, the interlock system can still work, the safety of the epitaxial device is improved to the maximum, and the safety hidden danger when the hardware interlock device fails can be effectively avoided.

This invention relates to a cascaded heading control method and system for unmanned surface vessels (USVs). The method includes the following steps: constructing an inner-loop heading control system based on an FOPID controller, used to output a control quantity to drive the USV's steering system based on the deviation between the USV's desired heading and its actual heading; constructing an outer-loop heading control system based on an ADRC controller, used to output the USV's desired heading based on the deviation between the USV's desired heading and its actual heading, as well as the USV's current total disturbance; using the USV's desired heading output from the outer-loop heading control system as the input to the inner-loop heading control system to form a cascaded control system; inputting a step signal into the cascaded control system to simulate the USV's desired heading, thereby controlling the USV's heading through the cascaded control system. This invention effectively improves the heading maintenance and tracking capabilities of high-speed USVs in complex sea conditions, enhancing the reliability and safety of USV surface operations.

To improve adjustment of a PDI parameter in control of a dehumidifier.SOLUTION: The cascade control system 200 of the dehumidifier 202 for controlling the moisture level comprises a heater 210 for adjusting the moisture level of the outgoing process air by heating the incoming reactivation air, a primary control module 220 for controlling the moisture level by controlling the dehumidifier 202, and a secondary control module 230 for controlling the temperature of the incoming reactivation air to match a desired temperature set point SP2 by controlling the heater 210. The primary control module 220 is a model predictive control (MPC) module configured to provide as outputs the desired temperature set point SP1 of the secondary control module while adjusting the moisture level to match the desired moisture set point SP2, and configured to predict a future moisture level and calculate the desired temperature set point SP2 of the secondary control module 230 based on the predicted moisture level.SELECTED DRAWING: Figure 2

Method for operating a comminution device with a rotor (1) having a large moment of inertia, in particular a chipper, shredder, refiner, crusher or mill, wherein the comminution device - includes an electric primary drive (12) for driving the rotor (1) during the comminution operation and - an electric secondary drive (15) for accelerating and / or decelerating the rotor (1) outside of the comminution operation, as well as - a power converter (16) for supplying the secondary drive (15) with electrical energy, - a rotary encoder (20) for detecting the rotation of the rotor or secondary drive (15), - an evaluation unit (19) for recording and evaluating the signals from the rotary encoder (20), - a first controller (21) and a second controller (22) for outputting a manipulated variable to the power converter (16), and - a data processing and control unit (17), wherein a) the primary drive (12) is de-energized or the data processing and control unit (17) de-energizes the primary drive (12), b) the data processing and control unit (17) outputs a signal about the target speed to the first controller (21), c) the rotary encoder (20) detects the number of pulses generated by the rotation of the secondary drive (15) and outputs it as a signal to an evaluation unit (19), d) the first controller (21) in a first control loop extracts the actual rotational speed from the signals of the evaluation unit (19), compares the actual rotational speed with the target rotational speed and determines a manipulated variable from the comparison, e) the first controller (21) outputs the manipulated variable to the converter (16), and f) the process steps c) to e) are repeated until the target rotational speed is reached, and wherein the rotor (1) is positioned g) upon reaching the first knife change position, a reference signal is generated and output to the data processing and control unit (17), h) the data processing and control unit (17) outputs a signal about the target position of the rotor (1) for the next knife change position to the second controller (22), i) the evaluation unit (19) determines the actual position of the rotor (1) from the number of signals from the rotary encoder (20) after generating the reference signal and outputs it to the second controller (22), j) the second controller (22) in a second control loop compares the actual position with the target position, determines a manipulated variable from the comparison and outputs the manipulated variable to the converter (16), wherein k) the process steps i) to j) are repeated until the target position is reached, and wherein I) the first control loop and second control loop form a cascade control system.

The invention relates to a dual-system frequency conversion cascade control system, and belongs to the technical field of heat pump control systems. According to the system, the working state can be adjusted according to the real-time environment change through frequency adjustment of the variable-frequency press, reasonable starting and stopping of the fixed-frequency press and intelligent control over the defrosting mode, and frequent mechanical abrasion is avoided, the service life of equipment is prolonged and the optimal energy efficiency is achieved by reducing unnecessary press starting and stopping and delay control.

The application discloses a kind of cascade control system and method of instrument vacuum pump system, the system includes multiple vacuum pumps, ion rules, front-stage rules, serial data collector, industrial integrated machine etc..Industrial integrated machine has data monitoring and data traceability function. Operator executes the start-stop of vacuum pump through industrial integrated machine and only needs mode activation, system self-checking, cascade start-stop operation. Compared with prior art, the serial data acquisition device is used in the application to replace PLC which needs power distribution cabinet power supply, so as to reduce the size of the equipment; the system self-checking, data traceability and human confirmation function are added; the man-machine interaction is enhanced in the automatic process, the operation threshold and the failure probability are reduced, and the management efficiency of the equipment is improved.

The invention discloses a laser equipment control system for heterogeneous cascade control. The laser equipment control system comprises an upper computer, a master station module and at least one slave station module, the slave station module comprises a slave station chip, a slave station FPGA and a slave station processor. The master station module and the slave station chip establish communication connection based on an EtherCAT protocol; the slave station chip is connected with the slave station FPGA through a high-speed parallel interface, and the slave station processor is connected with the slave station FPGA; the system comprises a cascade working mode and an independent working mode. And the slave station processor receives a control instruction of the upper computer, transmits the control instruction to the slave station FPGA, controls the working state of the laser equipment, collects state information and transmits the state information back to the upper computer. The high-speed parallel interface between the slave station chip and the slave station FPGA replaces a traditional serial interface, the data transmission rate is greatly improved, the high-real-time control requirement is met, the two modes are flexibly switched, multiple slave station modules do not need to be forcibly configured, and the application flexibility and expansibility are improved.

The invention belongs to the technical field of new energy power generation, and provides a new energy cascade control system parameter optimization method based on improved particle swarm optimization, which comprises the following steps: firstly, constructing a cascade control framework including new energy station control and converter control; and then uniform initialization of a particle swarm is realized by introducing a Latin hypercube sampling technology, and optimization of the dynamic performance of the system is realized by adopting a nonlinear decreasing inertia weight strategy and a dynamic balance algorithm exploration and development process and taking an integral time weighted absolute error as a loss function. The method effectively overcomes the problem that a traditional parameter setting method depends on experience and is easy to fall into local optimum, can adaptively optimize a plurality of control loop parameters in the cascade control system, remarkably improves the dynamic responsiveness, anti-disturbance capability and steady-state precision of the system in grid-connected operation, and improves the reliability of the system. And the operation reliability and the power grid supporting capability of the new energy power station are enhanced.

The invention discloses a power grid friendly circular cooler waste heat cascade control system and method, relates to the technical field of circular coolers, and solves the technical problems that a traditional sintering circular cooler waste heat power generation system is insufficient in utilization of low-temperature flue gas, the energy utilization efficiency is low, and then negative influences are generated on the operation stability of a power grid. The high-temperature power generation module recycles high-temperature flue gas and medium-temperature flue gas, and waste heat steam is generated to drive the turbine to generate power; the low-temperature power generation module recovers low-temperature smoke, generates waste heat steam and conveys the waste heat steam to the high-temperature power generation module; the absorption refrigeration module recovers redundant flue gas and converts the redundant flue gas into cold water for storage; through gradient utilization of flue gas waste heat, stable output of electric power is achieved, impact on a power grid is reduced, the waste heat recovery and utilization rate is improved, the generating capacity is improved, meanwhile, the stability of the power grid is enhanced, and the system is particularly suitable for power grid operation under the condition that new energy installation is greatly increased.

The invention discloses a heat exchanger feed-forward cascade control system and method based on load change compensation, and belongs to the field of process industrial automation control and other heat exchangers with the outlet temperature needing to be rapidly adjusted along with loads. According to the system, on the basis of a traditional outlet temperature-heat-containing medium flow cascade structure, a load obtaining module and three kinds of feedforward components including a steady state, a load increasing component and a load reducing component are arranged, a unit target load, an actual load and the change rate of the unit target load and the actual load are converted into flow pre-adjusting variables, and the flow pre-adjusting variables and main loop PID output are overlapped to form an auxiliary loop set value; and the auxiliary loop PID drives the flow regulating valve to quickly track. According to the method, temperature difference margin logic is constructed by combining inlet and outlet gas temperatures and inlet and outlet heat-containing medium temperatures, on the premise that the heat exchange safety boundary is guaranteed, rapid tracking of the outlet gas temperature of the heat exchanger on a target value is achieved, and the expansion machine power tracking capacity and the energy efficiency and safety of a compressed air energy storage system are improved.