31results about How to "Reduce frequent adjustments" patented technology

The invention provides a power distribution method based on wind power and thermal power combined power generation. According to the power distribution method, adjustment of a thermal power generating unit is started by judging whether the cross section margin of grid connection point exceeds an upper limit value or a lower limit value, so that the adjustment frequency of the thermal power generating unit is reduced; under the condition that the wind power generation output is larger, the strategy that the wind power is restrained appropriately is taken into consideration, shutdown operation of the thermal power unit is not likely to happen, and harmful operation conditions of a thermal power plant are reduced; under the condition of a certain power instruction, the strategy that wind power and thermal power are delivered out in a bundled mode is adopted, wherein the priority is given to wind power during delivery, when the total generated power of the wind power and the thermal power exceeds the power instruction, reduction of the output of the thermal power unit is taken into consideration, and if when the thermal power unit operates at the minimum technical output, the total power of the wind power and thermal power stills exceeds the power instruction, the measure that a wind power plant stops wind power generation so as to enable the total delivered power to be controlled within the power instruction is taken into consideration.

The invention discloses a roller balance control method of a planisher. Pressure given gains on two sides of a planishing working roller are changed to avoid the shock of a hydraulic system, so that the roller clearance deviation caused by the shock of the hydraulic system is avoided; meanwhile, as a dead zone control function is added in roller-system balance control, the frequent adjustment on the output of servo valves is reduced to realize roller-system dynamic balance.

The invention discloses a compacting method for improving cutting width precision of plastic materials, and device for implementing the compacting method. The compacting method includes connecting an upper conveyer belt to an electric cylinder which is driven by a motor, arranging a pressure sensor and a height sensor on the electric cylinder, connecting the pressure sensor, the height sensor and the motor to a control system, and allowing a lower conveyer belt and the upper conveyer belt to form a certain inclined angle and conveying material forwardly at certain speed for gradual compacting. The height of the upper conveyer belt is regulated by the electric cylinder, and the material is cut by blades from top to bottom under a certain frequency. The compacting method and the device for implementing the compacting method have the advantages that density and layer height of the material in a cutting area can be controlled stably, the cut material is well loose, uniformity of cutting width is improved greatly, loss of raw materials can be reduced, and economic benefit can be increased.

The invention discloses a remote-measuring breathing machine, comprising a breathing machine body and a shell externally arranged on the breathing machine body. A display and a keyboard which are connected with the breathing machine body are arranged on the surface of the shell. The breathing machine body is provided with a control circuit main board. The breathing machine body is internally or externally provided with a remote-measuring device being capable of remotely measuring a human body sign signal. The remote-measuring device is connected with the control circuit main board. The control circuit main board is used for controlling the work operation manner of the breathing machine body. The breathing machine disclosed by the invention is simple in structure, can remotely measure a human sign of a patient by using a remote-measuring technology, and can adjust the work operation manner of the breathing machine in real time. Therefore, the use efficiency and the work efficiency of the breathing machine are improved, the remote-measuring breathing machine is convenient and flexible to use, and the curative effect of the breathing machine is improved.

The invention discloses a coal preparation plant main coal washing production method, and relates to the technical field of coal mines. The method comprises the following steps that S1, equipment is checked, and specifically equipment parameters and technological parameters are checked before starting; S2, equipment of a main coal washing system is made to form a closed relation; S3, one-key centralized control starting is carried out on the main coal washing system; S4, used materials of the main coal washing system are controlled; and S5, collected information is transmitted to a mobile terminal through an information management system. The method has the advantages that the on-site production safety and the production efficiency are improved, the fault shutdown probability is reduced, apart of unsafe factors generated after equipment heavy load shutdown are avoided, the starting time is shortened, the starting interruption is avoided, and the economic effect is greatly improved.

The invention discloses a continuous sequencing-batch aerobic subsequent treatment section influent water flow control device and a flow buffer method. The flow control device comprises an aerobic pool and a coagulation pool, wherein the aerobic pool comprises a water inlet, a water outlet and a buffer pool of which the liquid level height is lower than the buffer pool of the aerobic pool water outlet; the buffer pool at least comprises a water inlet, a water outlet and a functional weir port; the functional weir port is provided with a seal valve plate for regulating the height of the functional weir; the water outlet of the aerobic pool is connected with the water inlet of the buffer pool; the coagulation pool is positioned downstream the water outlet of the buffer pool; and the effluent water of the functional weir of the buffer pool is connected with the water inlet of the aerobic pool through a return pipe. The buffer pool is arranged behind the effluent water of the aerobic pool, so that most excess effluent water of the aerobic pool flows out from the functional weir, thereby ensuring that the wastewater can stably enter the subsequent treatment work section, and avoiding the defects of unstable operation, high chemical consumption and the like in the subsequent treatment work section due to sudden increase of the wastewater flow of the aerobic pool.

The invention discloses a remote-measuring breathing machine, comprising a breathing machine body and a shell externally arranged on the breathing machine body. A display and a keyboard which are connected with the breathing machine body are arranged on the surface of the shell. The breathing machine body is provided with a control circuit main board. The breathing machine body is internally or externally provided with a remote-measuring device being capable of remotely measuring a human body sign signal. The remote-measuring device is connected with the control circuit main board. The control circuit main board is used for controlling the work operation manner of the breathing machine body. The breathing machine disclosed by the invention is simple in structure, can remotely measure a human sign of a patient by using a remote-measuring technology, and can adjust the work operation manner of the breathing machine in real time. Therefore, the use efficiency and the work efficiency of the breathing machine are improved, the remote-measuring breathing machine is convenient and flexible to use, and the curative effect of the breathing machine is improved.

A control method for unifying self-balancing and self-smoothing of micro-grid is provided. The method comprises the following steps: formulating a local load demand power prediction curve, a self-balancing degree plan curve and a self-smoothing degree limit value by a micro-grid energy managing system; judging whether the micro-grid energy managing system accept schedule of a regional distribution network scheduling system; reporting the self-balancing degree plan curve and the self-smoothing degree limit value to the regional distribution network scheduling system; formulating a self-balancing degree boundary curve and a self-smoothing degree boundary limit value by the regional distribution network scheduling system; receiving the self-balancing degree boundary curve and the self-smoothing degree boundary limit value by the micro-grid energy managing system; and processing coordination control to distributed power supply, an energy storage device and controllable load in the micro-grid by a micro-grid central controller. The method can reduce disturbance influence of intermittent renewable energy resource power fluctuation to accessed regional distribution network at high permeability; and high energy utilization ratio is acquired.

The invention discloses a method, a device and a system for controlling the auxiliary power unit of a vehicle, and an engineering machine. The method comprises the following steps of: receiving the current needed power Preq of the vehicle after the auxiliary power unit (APU) is started; comparing the current needed power of the vehicle with a preset economic output power segmentation interval of the auxiliary power unit, and determining the output power of the auxiliary power unit according to the compared result to enable the output power of the auxiliary power unit to meet the current needed power of the vehicle. According to the method, the device and the system for controlling the auxiliary power unit of the vehicle, and the engineering machine disclosed by the invention, segmentation control is performed on the output power of the APU, thus realizing short response time of the output power of the APU, and therefore, the output power of the APU can follow the current needed power of the vehicle in time; moreover, frequent adjustments on the rotational speed of an engine and the torque of a power generator can be reduced.

The embodiment of the invention discloses a frequency regulating method and device for a compressor. The method comprises the following steps of: obtaining an outlet air temperature when the compressor normally works, and calculating ideal output power of a frequency converter when the outlet air temperature is within a preset range; and calculating ideal frequency according to a relationship between the ideal output power of the frequency converter and the frequency of the frequency converter, and regulating frequency of the frequency converter to ideal frequency. According to the embodiment of the invention, when the outlet air temperature is within the normal range, frequency of the compressor is timey regulated according to output power of the frequency converter, so that a response rate of the compressor is increased, and the temperature changing amplitude is reduced.

The invention discloses a roller balance control method of a planisher. Pressure given gains on two sides of a planishing working roller are changed to avoid the shock of a hydraulic system, so that the roller clearance deviation caused by the shock of the hydraulic system is avoided; meanwhile, as a dead zone control function is added in roller-system balance control, the frequent adjustment on the output of servo valves is reduced to realize roller-system dynamic balance.

The invention relates to a method for preventing middle roller way strip steel from rising, and belongs to the technical field of steel rolling in the metallurgical industry. According to the technical scheme, the method comprises the following steps of (1) calculating the loop rising amount delta L, namely L2-L1; (2) calculating the loop rising rate e, wherein e is equal to delta L / L; (3) calculating a cascade speed correction coefficient g of a rough rolling end rack; and (4) correcting the speed of the rough rolling end rack by using the correction coefficient g, specifically, after loop rising of the middle roller way strip steel is judged and the cascade speed correction coefficient g of the rough rolling end rack is calculated, checking the upper limit and the lower limit of the correction coefficient g before the speed of the rough rolling end rack is corrected, and multiplying the correction coefficient g after the limit check by a speed set value of the rough rolling end rack to achieve a new speed setting for adjusting the rough rolling end rack so as to prevent the middle roller way strip steel from rising. The method has the beneficial effects that the loop rising condition of the middle roller way strip steel is judged through a logical algorithm, and then the speed of the rough rolling end rack is corrected, so that the purpose of preventing loop rising of the middle roller way strip steel is achieved.

The invention discloses a heat dissipation and temperature control method and system of a transformer. The method comprises the steps that: a temperature acquisition module acquires temperature signals in a transformer and a transformer cabinet, and transmits the temperature signals to a data processing module for processing, and the like. According to the method, when the current signal is abnormal and the fault caused by the temperature factor is determined, the temperature is automatically adjusted, all temperature values at each moment are not needed to be considered during temperature control, only the needed temperature values are needed to be considered with emphasis, the vector dimension of the temperature sequence is processed along with the increase of time and the acquired temperature values, when the calculated amount of the temperature data and the time data is exponentially multiplied, the temperature adjusting instruction at the current moment is memorized, and the voltage is adjusted by accumulating on the basis of the temperature adjustment at the current moment at the next moment, so that the continuity of the voltage adjusting process of the transformer node in the temperature adjustment is ensured.

The invention discloses a control method and system for a double-motor electric scooter, which uses a gyroscope to measure the running state of the electric scooter, and realizes reasonable distribution of torque and precise control for different situations. When turning, the motor is allowed to realize the adaptive differential turning performance of the electric scooter under different load conditions, which reduces energy loss and improves the endurance of the system. As a result, the generated speed compensation is given to the torque adjustment distributor, that is, the compensation value of the angle value that has the greatest influence on the system is directly given to the torque adjustment distributor, which speeds up the adjustment of the system. The compensation values ​​of the two angle values ​​that have little influence on the system are given to the PI regulator at a given speed to slowly adjust the system. After the torque is adjusted reasonably by the distributor, it can be adaptively adjusted according to various road conditions.

The invention provides a power distribution method based on wind power and thermal power combined power generation. According to the power distribution method, adjustment of a thermal power generating unit is started by judging whether the cross section margin of grid connection point exceeds an upper limit value or a lower limit value, so that the adjustment frequency of the thermal power generating unit is reduced; under the condition that the wind power generation output is larger, the strategy that the wind power is restrained appropriately is taken into consideration, shutdown operation of the thermal power unit is not likely to happen, and harmful operation conditions of a thermal power plant are reduced; under the condition of a certain power instruction, the strategy that wind power and thermal power are delivered out in a bundled mode is adopted, wherein the priority is given to wind power during delivery, when the total generated power of the wind power and the thermal power exceeds the power instruction, reduction of the output of the thermal power unit is taken into consideration, and if when the thermal power unit operates at the minimum technical output, the total power of the wind power and thermal power stills exceeds the power instruction, the measure that a wind power plant stops wind power generation so as to enable the total delivered power to be controlled within the power instruction is taken into consideration.

The invention belongs to the technical field of control of a wind force generation main control system, and discloses a deloading control method of primary frequency modulation of a wind force generator set. According to the condition that a variable pitch wind turbine generator set has different wind energy catching efficiency at different propeller pitch angles and different blade tip speed ratios, based on integrating advantages and disadvantages of a superspeed method and a propeller pitch angle control method during power standby application and control, a propeller pitch angle control strategy is used to realize deloading control of primary frequency modulation of a wind force generator set. The control method comprises a standby application control strategy for three kinds of powerat low wind speed, middle wind speed and high wind speed. The control method is simple and reliable. Alleviation of the mechanical wear and tear of the device caused by frequent regulation of propeller blades of a wind force generator set during primary frequency modulation deloading operation, is facilitated.

The invention discloses a multi-type power elastic load combined adjustment method in building groups. The method comprises steps of firstly determining an optimization target curve of a regulation and control quantity according to the adjustable potential of elastic loads in a range under the jurisdiction of a dispatching center or an aggregator; formulating a global optimization target of regulation and control; determining a load group participating in regulation and control according to use characteristics of the loads in the full time domain range, the power consumption behavior prediction result and the like; grouping the loads according to the load characteristics, and sorting the adjustment sequence of each group according to scene requirements; starting to adjust the adjustable resources in the group from the first group, and if an optimization target is achieved, ending regulation. The method is advantaged in that different elastic loads are grouped, the adjusting effect of demand response is improved, moreover, loads with the state values far away from the target value are preferentially selected for regulation and control based on sorting of the states of the elastic loads.

The invention relates to a method for preventing strip steel from rising up in an intermediate roller table, and belongs to the technical field of steel rolling in the metallurgical industry. The technical solution is: operate according to the following steps: (1) Calculate the starting amount △L, that is, L2‑L1; (2) Calculate the starting rate e, e=△L / L; (3) Calculate the rough rolling mill Frame cascading speed correction coefficient g, (4) Use the correction coefficient g to correct the rough rolling final frame speed: when it is judged that the intermediate roller table strip is pulled up and the rough rolling final frame cascading speed correction coefficient g is calculated, in Before correcting the rack speed of the rough rolling mill, check the upper and lower limits of the correction coefficient g. The correction coefficient g after the limit check is multiplied by the speed setting value of the rough rolling mill stand to reach the new speed setting, which is used to adjust the rough rolling mill end. frame, so as to prevent the middle roller strip from rising. The beneficial effect of the invention is that: through the logic algorithm, the strip-up condition of the intermediate roller table is judged, and then the speed of the rack at the end of rough rolling is corrected, so as to achieve the purpose of preventing the strip-up of the intermediate roller table.