38 results about "Pid regulator" patented technology

The invention discloses a six-phase motor driver harmonic current suppression method based on multi-subspace control, and belongs to the technical field of motor control. In order to solve the problem that low-order harmonic current of a six-phase motor in a z1-z2 subspace is difficult to effectively suppress, the invention provides a scheme that a mathematical model of the six-phase permanent magnet synchronous motor is established, multi-subspace decomposition is carried out, and stator current is divided into a d-q subspace and the z1-z2 subspace; a double-closed-loop control architecture with a speed loop as an outer loop and a current loop as an inner loop is constructed, a d-q subspace adopts a PID regulator to realize fundamental current control, and z1-z2 subspaces realize suppression of fifth and seventh harmonic currents through a parallel structure of PI and a quasi-proportional resonance controller; and a PWM signal is synthesized through inverse transformation and dual three-phase space vector pulse width modulation, and an inverter is driven to realize stable output of fundamental wave energy and harmonic suppression. The method effectively reduces the harmonic distortion rate, improves the operation efficiency and stability, and is suitable for occasions of new energy vehicles, ship propulsion, rail transit and the like.

The invention relates to an electric vehicle speed control system and control method based on PID control, and solves the problems of slow vehicle speed adjustment, overshoot and the like of a current vehicle control system. Comprising a speed error input module, a PID controller and a torque output module. Comprising the following steps that 1, the current vehicle speed V1, the maximum vehicle speed V, the current motor rotating speed Spd1 and the motor torque T1 are obtained; 2, according to the current rotating speed Spd1 of the motor, the required torque T2 of the motor at the next moment is obtained; 3, a step-by-step PID regulator is set, the first-stage regulation limit value is M1, and the second-stage regulation limit value is M2; when V-V1gt; when M1 is greater than M1, the P value is increased to enable the vehicle speed V to approach the maximum vehicle speed V; when M2lt; v-V1lt, V-V1lt; when M1 is greater than M1, the P value is reduced, and the I value is increased to prevent system overshoot; 4, when the vehicle speed error is smaller than the second-level limit value M2, control is stopped so that the vehicle speed can be stabilized at the target speed; and 5, limiting the upper and lower limits of integration to avoid the problem of integration saturation. According to the invention, the vehicle speed can be controlled more accurately and stably.

The invention belongs to the technical field of sputter deposition, and provides an automatic temperature control system and method for a sputter deposition device, and the system realizes the accurate control of the cavity temperature in the sputter deposition process by integrating components such as a vacuum gauge, a gas cylinder, a valve, a thermocouple temperature measurement element and a PID (Proportion Integration Differentiation) regulator. The system monitors the temperature of the cavity in real time by using the thermocouple, and automatically adjusts the power of the heating wire through the PID regulator according to the comparison result of a set value and an actual value, thereby maintaining the stability of the temperature of the cavity. In addition, the system has the function of communicating with an upper computer, remote monitoring and control can be carried out through a software layer, and the automation level and the temperature control precision of the sputtering deposition process are improved. The problems that in the prior art, temperature control precision is low, the automation degree is insufficient, and stability is poor are solved, through linkage control over the temperature, the vacuum degree and the gas flow, the consistency of film performance is guaranteed, and the method is suitable for large-scale production of high-precision films.

The application discloses a large-size photovoltaic cell doping / oxidation / annealing process adaptive quality management system, which comprises a data acquisition layer, an intelligent decision-making layer and a control execution layer; the data acquisition layer collects process parameters through doping, oxidation and annealing PLC systems, constructs a time-space aligned process data cube, and outputs a multi-dimensional feature matrix containing time x process x parameter; the intelligent decision-making layer analyzes the multi-dimensional feature matrix by using a random forest hidden crack classification model and outputs a hidden crack risk grade; the control execution layer comprises a dynamic compensation strategy composed of a diffusion furnace temperature control module and an annealing cooling compensator, is used for generating an OPC UA instruction according to the hidden crack risk grade, and triggers an annealing furnace PID regulator through the OPC UA instruction to dynamically adjust process parameters of the annealing furnace; the application solves the data island problem by integrating multi-process PLC data and the random forest model, realizes high-precision hidden crack prediction, and significantly improves the quality detection efficiency.

The present disclosure provides a liquid level control device, method, equipment and storage medium. The present disclosure sends start or stop instructions to the switching module through the start-stop module; the switching module receives the start or stop instructions and selects different control paths based on the start or stop instructions; the rate control module receives an enable signal; based on the enable signal, a preset rate limit value and a preset liquid level target value, a smooth target value is determined and sent to the PID regulator; the PID regulator receives the smooth target value or a tracking signal and controls the liquid level based on the smooth target value or the tracking signal. In summary, the technical solution provided by the present disclosure can provide precision and smoothness of liquid level control and can adapt to various application scenarios.

The invention discloses a large-size photovoltaic cell doping / oxidation / annealing process adaptive quality management system. The system comprises a data acquisition layer, an intelligent decision-making layer and a control execution layer. The data acquisition layer acquires process parameters through a doping, oxidation and annealing PLC (Programmable Logic Controller) system, constructs a space-time aligned process data cube, and outputs a multi-dimensional feature matrix containing time * process * parameters; the intelligent decision-making layer analyzes the multi-dimensional feature matrix by using a random forest subfissure classification model, and outputs a subfissure risk level; the control execution layer comprises a dynamic compensation strategy composed of a diffusion furnace temperature control module and an annealing cooling compensator, and is used for generating an OPC UA instruction according to the subfissure risk level, triggering an annealing furnace PID regulator through the OPC UA instruction, and dynamically regulating process parameters of the annealing furnace; according to the method, the multi-process PLC data and the random forest model are integrated, the problem of data islands is solved, high-precision subfissure prediction is achieved, and the quality detection efficiency is remarkably improved.

The application discloses a kind of with load decoupling's coal circulating fluidized bed boiler bed temperature independent regulation method, solve the existing boiler bed temperature and boiler load coupling, cannot realize the problem of boiler bed temperature independent regulation and stability;With furnace differential pressure as the second PID2 regulator input value PV2 is set, the output value of second PID2 regulator is used as the control input signal of the variable frequency motor of boiler ash cooler discharge capacity, realize the adjustment of the circulating ash of the above two conditions, and the set value SP1 and measured value PV1 of bed temperature are used as the input value of first PID1 regulator, the output value of first PID regulator is used as the differential pressure set value SP2 of second PID2 regulator, through the coupling connection of first PID1 and second PID2, realize with bed temperature change as input, with the control input signal of the variable frequency motor of boiler ash cooler discharge capacity as execution unit, realize the stable regulation of boiler bed temperature and bed temperature and boiler load decoupling.

The utility model discloses an integrated control system of a screw compressor, which comprises a servo control system, a double-screw compressor, a water cooler, a gas storage tank, a pressure protection switch and a display panel, the gas storage tank is provided with a pressure sensor and a temperature sensor, the servo control system comprises a PID (Proportion Integration Differentiation) regulator, and the display panel is connected with the double-screw compressor. And the servo control system adjusts the rotating speed of a driving motor of the double-screw compressor in real time through a PID (Proportion Integration Differentiation) regulator to be matched with the change of gas consumption. According to the servo control system, the rotating speed of the motor can be adjusted through the PID regulator, the situation that air inflow and unloading of the screw compressor are completely stopped due to the fact that the pressure upper limit is reached in a traditional control mode is avoided, the operation efficiency is improved, and the technical effect of energy conservation is achieved.

The application discloses a kind of based on power pre-control's constant speed mode control's calibration method and device, greatly reduce the calibration time in customer field, improve the project test schedule, shorten project cycle, provide the buffer time for solving the problem of contingency.The application includes: obtaining the flight state instruction signal sent by flight control simulator, the flight state instruction signal contains the target speed of preset engine;According to the flight state instruction signal, control the engine to run to the target speed;According to the engine loading of electric power dynamometer;The actual running speed of the engine is obtained;Judge the speed difference of the actual running speed and the target speed, if no, then the running speed of the engine is adjusted to the target speed by PID regulator;The current running speed of the engine is obtained again;According to the current running speed, calculate target torque.

The present application relates to the technical field of steel metallurgy automatic control, and especially relates to a method for solving the furnace pressure fluctuation of a step-by-step heating furnace, which comprises the following steps: constructing an electrical and instrument PLC communication link to acquire a furnace door action signal in real time and presetting a compensation parameter; when detecting that the furnace door is opened, instructing a PID regulator to switch to a manual mode, and reducing the opening degree of a flue damper or the running frequency of a fan according to the working condition to perform feedforward compensation; when the furnace door is closed, restoring the opening degree or frequency reference value, and switching back to the automatic mode after a delay preset time. In addition, the method further comprises the steps of compensation value self-learning optimization, exhaust temperature correction, safety interlocking and the like. The present application can break the hysteresis of traditional regulation, realize active defense of furnace pressure interference, control the furnace pressure fluctuation in a narrow range, effectively reduce energy efficiency loss and prolong the service life of equipment.

The application provides a method for loop optimization control in high-speed bar rolling, a loop control model with faster dynamic response speed is developed, and the proportional coefficient of a PID regulator is dynamically adjusted according to the deviation value between the actual value of the loop height and the set value of the loop height: when the deviation value is less than 30 mm and greater than or equal to 10 mm, the proportional coefficient is increased to 8; when the deviation value is less than 10 mm and greater than or equal to 5 mm, the proportional coefficient Kp is reduced to 5, and the proportional coefficient is appropriately reduced to 5; when the deviation value is less than 5 mm and greater than or equal to 1 mm, the proportional coefficient is reduced to 2; through the dynamic adjustment of the proportional coefficient of the PID regulator, the quick response of the rolling mill speed adjustment amount can be realized, the actual value of the loop height is adjusted to the set value of the loop height in the shortest time, the problem of slow loop adjustment is solved, the adjustment time is reduced to 100 ms through detection, the adjustment time is reduced by 50%, and the effect of stable loop control is achieved.

The invention relates to the technical field of metallurgical automation control, in particular to a method and a system for reducing unit consumption of coal gas by increasing heat recovery temperature by reducing cold air mixing quantity, and the method and the system are characterized in that the opening degrees of a fan outlet pneumatic control valve I and a fan outlet pneumatic control valve II are synchronously adjusted through a PID (Proportion Integration Differentiation) regulator according to the temperature of flue gas in front of a heat exchanger; and the cold air mixing amount in the air heat exchanger and the gas heat exchanger is controlled. The system has the advantages that the opening degree of the first fan outlet pneumatic control valve and the opening degree of the second fan outlet pneumatic control valve are synchronously adjusted through the PID regulator according to the temperature of flue gas in front of the heat exchanger, it is guaranteed that the air outlet amount of the first air mixing cooler and the air outlet amount of the second air mixing cooler are consistent, and energy consumption increase caused by uneven loads is avoided; due to the double-fan design, part of functions can still be maintained when a single fan breaks down, and the fault tolerance of the system is higher; oxygen content linkage is adopted, when the cold air mixing amount is larger than 83,000 m / h and the oxygen content is larger than 14.5%, temperature correction of the heating section is automatically triggered, the combustion intensity is reduced, and pollutant generation is controlled from the source.

The invention discloses a biomass boiler furnace pressure high-precision control and disturbance debugging method. Comprising the eight steps of construction preparation, hearth pressure measurement system calibration, fan and air door response characteristic debugging, primary air vibration grate collaborative debugging, PID regulator locking and tracking debugging, parameter matching debugging under different loads, load switching disturbance testing and acceptance inspection after debugging. According to the method, dynamic parameters of equipment such as the primary fan, the secondary fan, the adjusting air door, the induced draft fan and the vibration fire grate are optimized, effective control over the hearth pressure is achieved, safe and economical operation of the biomass boiler is guaranteed, the occurrence rate of unplanned shutdown accidents of a production unit is reduced, and the production efficiency is improved. Therefore, the economic benefit of the biomass power station is effectively improved.

The invention relates to a method for controlling a temperature (58) of a vehicle interior (12) of a vehicle (10), the temperature (58) being controlled by a controller (22), in particular a PID controller, in that a controller output variable (60) for controlling the temperature of the vehicle interior (12) is output by the controller (22), which is determined at least as a function of the measured temperature (58) of the vehicle interior (12). According to the invention, the regulator output variable (60) is fed as an input variable to a fuzzy logic (64), said input variable being smoothed by the fuzzy logic (64) at least as a function of at least one individual temperature sensing value, in particular a PMV value (62), of at least one vehicle occupant (40).

The invention discloses a decoding method for sine and cosine output signals of a TMR magnetic resistance angle sensing chip, and the method comprises the following steps: 1, setting the TMR magnetic resistance angle sensing chip, and obtaining the rotation amount of a rotating part to be detected through the TMR magnetic resistance angle sensing chip; step 2, the TMR magnetic resistance angle sensing chip converts the rotation amount into a sine signal and a cosine signal, and transmits the sine signal and the cosine signal to a processor unit; step 3, the processor unit processes the sine signal to obtain a sine value, processes the cosine signal to obtain a cosine value, and transmits the sine value and the cosine value to an angle phase difference calculation module, and the angle phase difference calculation module combines a feedback angle to calculate a difference value signal; 4, processing the difference value signal through a PID regulator to obtain a rotating speed signal; 5, processing the rotating speed signal through an integrator to obtain an angle signal; and 6, transmitting the angle signal as a feedback angle to an angle phase difference calculation module, and circulating the steps 1-5 to obtain a rotating speed signal and an angle signal in real time. And a rotating speed signal and an angle signal are obtained through closed-loop control. Closed-loop feedback control is adopted, obtained angle and speed information has the advantages of being high in precision, small in phase difference and the like, meanwhile, the problems of high-speed compensation and low-speed compensation are solved, and unification of signal processing algorithms is achieved.

The present application relates to the technical field of power plant production process automation, and discloses a coal mill air distribution warm grinding control method and device, electronic equipment and a storage medium. The method comprises the following steps: in the automatic mode, in response to the mill closing signal, the inlet cold air volume of the mill is increased by using a slope generator, and the outlet temperature of the mill is adjusted by a first PID regulator; when the inlet air volume is greater than or equal to a first air volume threshold, the inlet air volume and the outlet temperature are adjusted by the first PID regulator and a second PID regulator in a push-pull balance mode; when the inlet air volume is greater than or equal to a second air volume threshold and the outlet temperature is greater than or equal to a temperature threshold, the outlet temperature of the mill is adjusted by using a third PID regulator to schedule cold air, and the inlet air volume of the mill is adjusted by using a fourth PID regulator to schedule hot air. The present application realizes full-automatic control from the start to the normal operation of the coal layer burner, and eliminates the hidden danger of "misoperation" that may occur in the complex operation process by manual operation.

The invention relates to the technical field of flushing control, in particular to a water jet form control method, device and equipment and a storage medium, and the method comprises the steps that operation information is acquired to confirm a cleaning mode and mode working parameters corresponding to the cleaning mode, and the cleaning mode comprises sweeping injection and spot injection; controlling an electrified water washing device to start based on the mode operation parameters; the rotating angle of the mechanical arm, the water pressure value of the high-pressure water pipeline and the water flow at the nozzle are monitored in real time, in the spraying mode, the corrected water pressure value is calculated, and the power of the high-pressure pump is optimized based on the corrected water pressure value through a first PID regulator; in the spot mode, a real-time energy value is calculated, a second PID regulator is adopted, and the opening degree of the electric proportional valve is optimized based on the real-time energy value; according to the method, the power of the high-pressure pump and the opening degree of the electric proportional valve are dynamically adjusted through the two PID regulators respectively, response can be made in time according to changes of real-time working parameters, and the jet flow form in the cleaning process is effectively optimized.

The invention relates to the technical field of proportional electromagnetic valve control, and discloses a proportional electromagnetic valve current control circuit and system, which comprises a detection circuit, a comparison circuit, an electromagnetic valve driving circuit and a feedback regulation circuit with a multi-stage regulation structure, the detection circuit is connected with the electromagnetic valve driving circuit and the comparison circuit, the feedback regulation circuit is connected with the electromagnetic valve driving circuit and the comparison circuit, and the electromagnetic valve driving circuit is further connected with a proportional electromagnetic valve; a plurality of integration links and proportional links are added on the basis of a traditional PID regulator, so that a control system can obtain a higher response speed, and in an occasion with a tremor current control requirement, compared with the traditional PID regulator, the tremor current control method can eliminate speed errors and acceleration errors and improve the control precision.

The invention provides a power control method and system, electronic equipment and a computer readable storage medium. The method comprises the steps that feedback power output by a load resistor is fed back to a second PID regulator, and feedback electrical parameters output by the load resistor are fed back to a target power supply; determining a power difference according to the feedback power and a power set value output by the first PID regulator; adjusting the electrical parameter control information according to the power difference, and transmitting the electrical parameter control information to the target power supply; the electrical parameter control information is configured to adjust a power supply output electrical parameter of the target power supply; and after the power supply output electrical parameters of the target power supply are adjusted, continuously feeding back the feedback power output by the load resistor to the second PID regulator, and feeding back the feedback electrical parameters output by the load resistor to the target power supply until the feedback electrical parameters reach the set electrical parameters. Current control is replaced by power control, the influence of temperature on the system is reduced, and the power control precision and stability are improved.

The invention belongs to the technical field of automatic driving, and particularly relates to an automatic driving transverse and longitudinal trajectory tracking control method based on LQR and double PID, and the method comprises the steps: firstly estimating the pose parameter of a current vehicle in real time through an SCKF algorithm in a trajectory planner, setting a lane line constraint, and determining the planning trajectory information through the estimation parameter in combination with quintic polynomial fitting; then, an LQR-double-PID transverse and longitudinal trajectory tracking algorithm is adopted, a double-PID regulator is designed, an LQR controller is combined, the front wheel turning angle of the vehicle is calculated from the aspect of transverse control, and the driving torque / braking force of the vehicle is calculated from the aspect of longitudinal control; trajectory tracking control of the vehicle is achieved through the combined effect of the transverse controller and the longitudinal controller. Feedforward control and steering compensation are introduced from the outside, the steady-state error of the system is reduced, the corresponding movement torque / braking force of the tire is rapidly output, and the real-time performance of trajectory tracking is improved.

The application belongs to the field of brake system control, and is an aero-engine acceleration state brake system control method. Key parameters of engine acceleration process control are selected first, each key parameter is provided with a target limit value, and a deviation threshold is set between each key parameter and the corresponding target limit value. When the deviation of engine acceleration process control exceeds the deviation threshold, the acceleration state is exited. At this time, the control value obtained by the acceleration fuel supply exit PID regulation is controlled, the brake oil amount is obtained, and the brake control is switched. The deviation threshold is set to realize the switching between the engine acceleration process control and the brake control, to realize that the engine acceleration state fuel supply PID regulator meets the acceleration requirement, and to realize the requirement of rapid braking when the acceleration state is exited, so as to avoid engine over-temperature, over-speed and over-pressure, thereby solving the shortcoming that the acceleration fuel supply PID regulator cannot be compatible with acceleration and over-regulation limitation.

The invention discloses a prediction method for reheat steam temperature adjustment, and the method comprises the steps: S1, collecting a measurement value of the reheat steam temperature, and carrying out the preprocessing; s2, inputting the preprocessed measurement value into a first-order differential loop and a second-order differential loop of a T1 period, and performing piecewise function conversion to obtain a variable speed data value and a variable acceleration data value under the T1 period; s3, obtaining a changed speed data value and a changed acceleration data value in the T2 period; s4, the calculation results in the step S2 and the step S3 and the measured value of the reheat steam temperature are sent into an accumulator 1 to be accumulated, and a predicted value 1 of the reheat steam temperature and a predicted value 2 of the reheat steam temperature are obtained; the predicted value 1 of the reheat steam temperature and the predicted value 2 of the reheat steam temperature serve as process variables to be sent into a PID regulator 1 and a PID regulator 2 respectively; a result obtained by the PID regulator is sent to an accumulator 2; and a result obtained by the accumulator 2 is converted by a piecewise function and then is sent to a reheated flue gas baffle plate to control the action of the reheated flue gas baffle plate.

The invention belongs to the technical field of intelligent control, and discloses a cooperative control method and system for multiple process parameters of waste circuit board gasification treatment. The method comprises the following steps: collecting and integrating components and process data of the waste circuit board, and obtaining material characteristic vectors and process parameters through Kalman filtering; a bidirectional generative adversarial network is deployed in a programmable logic controller, an online reinforcement learning regulator is constructed, and the generation weights of double generators of the bidirectional generative adversarial network are dynamically adjusted; constructing a process parameter generator to obtain an optimal generated weight set; converting into a gasifier burner control signal, and dynamically controlling an executing mechanism to adjust process parameters through a PID (Proportion Integration Differentiation) regulator; according to the method, the cooperative control effect that multiple process parameters are dynamically adapted along with material characteristics, multi-target balance optimization is achieved, and physical constraints strictly obey is achieved, and the efficiency, stability and economical efficiency of waste circuit board gasification treatment are remarkably improved.

The invention discloses an air quantity control method and device for load change, electronic equipment and a storage medium, relates to the technical field of control, and can determine real-time oxygen quantity deviation by combining main steam flow and an oxygen quantity set value function table containing a nonlinear mapping relation. PID regulator parameters of an oxygen quantity control loop are dynamically adjusted according to the deviation and the change rate of the load instruction, an air quantity instruction generated according to the nonlinear relation between the fuel quantity and the preset air quantity set value function table can be corrected through the change rate of the fuel quantity, and the dynamic relation between the load change rate and the oxygen quantity deviation is established; the limitation of a static PID parameter and a fixed function relation is broken through, and the technical effects of improving the boiler combustion efficiency, enhancing the stability of an air supply control system, improving the adjusting precision and guaranteeing the automatic control capability of the system in a full load section are achieved.

The present application discloses a vehicle hybrid power system coordinated control method, device, equipment and medium, which relates to the field of vehicle hybrid power system control. The method includes: obtaining an engine operating state signal; calculating the driver's required torque through a PID regulator based on the engine operating state signal; determining the engine output oil volume based on the driver's required torque according to the engine's working state and power output characteristics; determining the motor output torque according to the driver's required torque and the engine output oil volume; controlling the engine according to the engine output oil volume and controlling the motor according to the motor output torque to achieve coordinated control of the vehicle hybrid power system. The present application achieves control of the vehicle hybrid power system through coordinated control of the engine and the motor.

According to the neutral-point balance control circuit and method for the three-level direct-current converter, the phenomenon of neutral-point drift can be prevented in the working process of the converter, and the neutral-point potential is stabilized to be one half of the bus voltage. The circuit comprises a bus voltage source (UH) arranged on a high-voltage side, an upper bridge arm voltage dividing capacitor (C1), a lower bridge arm voltage dividing capacitor (C2), a first switching tube (S1), a second switching tube (S2), a third switching tube (S3), a fourth switching tube (S4) and an LC filter, wherein the first switching tube (S1), the second switching tube (S2), the third switching tube (S3) and the fourth switching tube (S4) are connected in series; the method comprises the following steps: respectively collecting the output current IL of the output end of the LC filter and the voltage of the first voltage-dividing capacitor (C1) and the voltage of the second voltage-dividing capacitor (C2), calculating the compensation amount through a PID regulator, compensating the PWM duty ratio of the upper and lower bridge arms of the converter, and stabilizing the neutral-point voltage to be half of the high-voltage side voltage. The invention can be applied to the technical field of power electronics.

The invention relates to a method for reproducing the concentration of hydrocarbons in a steam-gas mixture by dynamically mixing two gas streams. The technical problem addressed by the invention is that of providing a device which can be used for preparing a plurality of steam-gas mixtures which are in a liquid state in a normal state. The device comprises a machine shell with a control unit, a connecting pipeline, a gas diluent flow regulator and a liquid flow regulator, and the regulators are all provided with PID regulators and connected with an evaporator through a mixing device. And the liquid flow regulator is connected with the liquid storage tank. The gas diluent flow regulator adopts a mass flow meter structure with a regulating valve; the liquid flow regulator is also a mass flow meter. The mixing device is a three-way mixer and is provided with a regulating valve. The evaporator is a heat exchanger with an electric heater and is provided with a temperature sensor.

The invention discloses a diesel-optical-storage micro-grid active and reactive power and low power factor balance control method and system, and the method comprises the steps: collecting a current voltage value, a current frequency value and a current power factor value of a diesel generator through a power monitoring module when a high-power motor is loaded or unloaded, performing deviation calculation on the current voltage value of the generator, the current frequency value of the generator and the current power factor value of the generator to obtain a deviation calculation result; determining a control priority through a power balance control module, and determining a target instruction according to a deviation calculation result; and adjusting active power and reactive power output by the photovoltaic inverter and / or the energy storage converter through a PID regulator. The method can balance the active power, reactive power and low power factors of the generator of the micro-grid system, improves the stability and reliability of the diesel-optical-storage micro-grid power supply system, reduces the cost, and can be widely applied to the technical field of micro-grid power systems.

The present invention discloses a frequency conversion system for a gas turbine rotor cooling air cooler blower, comprising a frequency conversion cabinet, in which a frequency converter, a power frequency contactor, a frequency conversion isolation contactor, and a control circuit are installed. The blower motor is connected to the frequency converter and the power frequency contactor, respectively, to form a frequency conversion and power frequency circuit. The control circuit includes a frequency conversion and power frequency operation control circuit. The frequency conversion operation and power frequency operation control circuits are switched by a power frequency / frequency conversion control switch. The frequency conversion operation control circuit and the power frequency operation control circuit are each provided with two parallel local control branches and a remote control branch. A remote TCS system obtains the cooling air temperature in the rotor cooling air cooler, adjusts it through a PID regulator, and then adjusts the frequency of the frequency converter. The present invention can realize power frequency and variable frequency operation of the blower motor, and can be operated remotely and locally. The PID regulator of the remote TCS system can realize automatic adjustment of the frequency converter frequency to control the rotor cooling at an appropriate temperature.

The utility model provides a blast furnace gas boiler nitrogen oxide pre-control device which is characterized in that a first temperature measuring device is arranged in a boiler, a second temperature measuring device is arranged at the top of the boiler, and a CEMS (continuous emission monitoring system) flue gas automatic monitoring device is arranged at a boiler gas discharge pipeline. The timer is used for counting down the starting time of the denitration device and transmitting the timing result to the DCS control device, the second temperature measuring device is connected with the input end of the furnace top water fetching signal processor, and the output end of the furnace top water fetching signal processor is connected with the input end of the DCS control device. The input end of the DCS control device is electrically connected with the first temperature measuring device, the second temperature measuring device, the CEMS flue gas automatic monitoring device and the timer respectively, the output end of the DCS control device is connected with the denitration device, the input end of the PID regulator is connected with the output end of the DCS control device, and the output end of the PID regulator is connected with the denitration device.