69results about How to "Improve dynamic tuning performance" patented technology

The invention relates to an electric power overhauling supporting device. The electric power overhauling supporting device comprises a fixed platform. Four parallel supporting chains are symmetrically installed on the upper end surface of the fixed platform. An operating platform is installed at the top ends of the four parallel supporting chains. A rotating shaft is installed in the middle of the lower end surface of the fixed platform through a bearing. A rotating motor is connected to the lower end of the rotating shaft through a coupler and installed on a bottom plate through a motor base. Three fixing shafts are uniformly arranged on the upper end surface of the bottom plate in the axis direction of the fixed platform. Three planetary wheels are installed at the upper ends of the three fixing shafts through bearings correspondingly. The inner sides of the three planetary wheels are all engaged with a sun wheel. The sun wheel is installed on the rotating shaft through a key. The outer sides of the three planetary wheels are all engaged with an inner gear ring. The electric power overhauling supporting device is capable of solving the problems that an existing substation rigid support is poor in dynamic adjustment performance, nonadjustable in height, small in application scope and the like and has the advantages of being good in rigid supporting performance, height adjustment performance and stability performance, wide in application scope, high in working efficiency and the like.

The invention discloses a coordinate control method suitable for real time scheduling and AGC (Automatic Gain Control) after large scale photovoltaic grid connection. The coordinate control method comprises the following specific methods of: (1) a coordinate and match method of real time scheduling and AGC; (2) a coordinate control method of real time scheduling and AGC command 'reverse scheduling': determining occurrence of the real time scheduling and AGC 'reverse scheduling' by judging three factors, such as system frequency, adjusting direction and adjusting volume to cope with difficulty in frequency modulation and resource waste by way of locking a scheduling plan; and (3) a coordinate control method for transitional mutual conversion between real time scheduling and AGC adjusting volume: after active adjustment process of AGC is finished, output adjustment is carried out by real time scheduling to recover the maximum adjusting volume of an AGC unit. The coordinate control method disclosed by the invention has the advantages of sufficiently utilizing adjusting resources inside a power grid, optimizing a resource adjusting manner inside the power grid, and ensuring that scheduling and control commands reflect the active power adjusting requirement of the power grid at real time, thereby enhancing the dynamic adjusting capacity of the power grid to resist active disturbance photovoltaic grid connection, and further expressing the proficiency of real time scheduling and AGC coordinate control.

The invention discloses a power grid voltage regulation method of an angle form cascade synchronous compensator. Unbalanced three-phase power grid voltage is independently subjected to positive and negative sequence voltage detection to obtain positive sequence voltage dq shaft components Vd[P] and Vq[P] and negative sequence voltage dq shaft components Vd[N] and Vq[N]; a difference value between the positive sequence voltage dq shaft components and a voltage control instruction as well as a difference between the negative sequence voltage dq shaft components and the voltage control instruction can be independently obtained, and a deviation is subjected to slip form PI control to obtain a STATCOM (Satellite Communications) line current positive and negative sequence dq shaft control instruction; after the STATCOM line current positive and negative sequence dq shaft control instruction is subjected to synchronous frame transform, zero sequence circulating current is combined to obtain a STATCOM phase current instruction; the STATCOM phase current instruction is subjected to current dead-beat control to obtain each-phase chain link modulating wave signal; carrier phase-shifting modulation is used for controlling each module switch to act, finally, positive sequence reactive current and negative sequence current are injected into a power grid, the positive sequence voltage of the power grid is supported, and the voltage fluctuation of a point of common coupling is reduced; and the negative sequence voltage of the point of common coupling is inhibited, and the unbalance of power grid voltage is improved. A slip form PI control method adopted by the invention can quickly support the positive sequence voltage of the power grid, control the positive sequence voltage of the power grid, inhibit short-time voltage leap and maintain the stability of the power grid voltage.

Embodiments of the application disclose a multicast realizing method and relevant network equipment, used for reducing the network bandwidth and the out-stream load of a live stream in the network transmission process. The method provided by the embodiments of the application comprises: a live service server sends a live stream injection request to a multicast resource management server; the liveservice server receives a live stream injection response sent by the multicast resource management server; the live service server sends, according to the address of a live stream injection node, a live stream injection instruction to the live stream injection node; the live service server receives a pushed stream address sent by the live stream injection node; and the live service server notifiesa live source of sending, according to the pushed stream address, a live stream to the live stream injection node, such that the live stream injection node corresponding to the pushed stream addressuses the multicast IP to carry out multicast for the live stream.

A storage device 500 includes an input 405 for receiving a digital video stream complying with a predetermined video encoding standard via a digital video communication system. The stream includes a sequence of digital video frames, a sequence of program clock reference stamps (PCR) and a sequence of video presentation time stamps (PTS). A time-base modifier 510 replaces the PTS's by respective modified video presentation time stamps (M-PTS) based on a constant predetermined frame time between successive presentation time stamps and replaces the PCR's by respective modified program clock reference stamps (M-PCR) by scaling the PCR's using a scaling factor that depends on a ratio of an expected time between a video presentation time stamp j and a preceding video presentation time stamp j−n and an actual time between the video presentation time stamp j and the preceding video presentation time stamp j−n, where j≧n>0. The expected time is n times the predetermined frame time.

The invention discloses a load emergency adjusting method and a load emergency adjusting device for a thermal power generator unit in an AGC manner. The load emergency adjusting device can flexibly and quickly adjust adjusting rate of the thermal power generator unit. The load emergency adjusting device is characterized in that the load emergency adjusting device comprises an analog quantity signal gatherer S which is used for acquiring a main steam pressure offset, a high-and-low-limit alarm module HLALM, a switching quantity signal gatherer DI, a logic not module, a logic or module, an RS trigger, an analog quantity switching device AXSEL, a multiplexer MUL, an A2 function generator and an A1 function generator; the output of the switching quantity signal gatherer DI is divided into two paths; one path is connected with the setting end of the RS trigger, and the other path is connected with the input end of the logic or module through the logic not module; the output end of the RS trigger is successively connected with the analog quantity switching device AXSEL and the multiplexer MUL; and the A2 function generator and the A1 function generator are respectively connected with the input end of the switching quantity switching device AXSEL and the input end of the multiplexer MUL.

The invention discloses a source-load coordinated frequency modulation method based on a load frequency control model. The method comprises steps of: 1, using a micro gas turbine unit, a small-scale hydroelectric generating unit and a flywheel energy storage system as a frequency modulation unit; 2, establishing a load frequency control model corresponding to the micro gas turbine unit, the small-scale hydroelectric generating unit, the flywheel energy storage system, wind power generation, photovoltaic power generation and a user load; 3, establishing a micro-grid MDP mathematical model for any region of an island two-region multi-source micro-grid; 4, acquiring data required by source-load coordinated frequency modulation of the island two-region micro-grid; and 5, solving the MDP mathematical model by using a simulated-annealing-based Q learning theory algorithm. The frequency of the island two-region micro-grid system is stabilized by the source-load coordinated method and an AGC controller based on the learning optimization method, such that system safety stability is improved.

An electromagnetic friction clutch has at least two clutch parts that are mounted so as to be rotatable relative to each other and movable toward and away from each other and that touch each other with a contact force in the position of use. The clutch parts are located in a magnetic circuit, which is guided in the clutch parts in a soft magnetic material in sheet form. Positioned in the magnetic circuit is an electromagnet having a soft magnetic core and a coil. The magnetic circuit has air gaps between the soft magnetic core and at least one of the clutch parts. The flux density in the magnetic circuit, and thus the contact force, is modifiable via the current applied to the coil. The magnetic flux changes at least ten flux crossover points one after the other in the direction of flow between the clutch parts. The cross section of the magnetic flux in at least one air gap is at least five times greater than the smallest flux cross section in the soft magnetic material.

The invention discloses an electric automobile magnetic suspension flywheel battery zero-power consumption decoupling controller based on a dynamic model. The controller comprises a composite controlled object, a fuzzy neural network inverse dynamic switching model based on a soft set theory method, a linear closed-loop controller and a zero-power consumption control module, output of the linear closed-loop controller serves as input of the fuzzy neural network inverse dynamic switching model based on the soft set theory method, output of the fuzzy neural network inverse dynamic switching model based on the soft set theory method serves as input for controlling the composite controlled object, output of the composite controlled object acts on a magnetic suspension flywheel battery dynamicmodel, input of the zero-power consumption control module is from output of the magnetic suspension flywheel battery dynamic model and the fuzzy neural network inverse dynamic switching model based onthe soft set theory method, and output of the zero-power consumption control module acts on the linear closed-loop controller. According to the controller, translation and rotation modes are decoupled, the zero-power consumption control module is introduced for a decoupled system, and power consumption is reduced.

Disclosed is an operation control method of the distributed power supply of an active power distribution network. For a low-voltage power distribution network, when the system in a traditional droop control method reaches a steady state, the output power is relevant to the errors of voltage frequency and amplitude. The method replaces the power with current in Park transformation; by means of appropriate transformation, droop control can be equivalent to 'constant power control' with reference current superposed with parts of frequency errors and parts of voltage amplitude errors; through the control of the error information, different operation requirements of two operation modes on DG (distributed generation) can be met. The operation control method of the distributed power supply of the active power distribution network is applicable to a grid-connected operation mode as well as an isolated island operation mode of the active power distribution network, can omit switch of control methods and accordingly can guarantee smooth conversion of the operation modes of the active power distribution network.

The present invention discloses a method and system for a thermal generator set load speed changing regulation control based on a regional new energy real-time generation load. A thermal generator set load speed changing regulation control switching threshold is set according to the new energy generation capacity and the power grid operation demand in a region, and when the new energy generation load in the region is larger than the threshold, a related thermal generator set automatically completes undisturbed switching of load regulation from low-speed regulation to high-speed regulation; and when the new energy generation load in the region is smaller than the threshold, the related thermal generator set automatically completes the undisturbed switching of the load regulation from high-speed regulation to low-speed regulation. The power grid regulation capacity is enhanced, the power grid power supply quality is improved, and the capacity of the stable operation of the power grid is improved.

The invention provides a composite compensation device for long-distance sparse power supply. The input is a power supply line input end, and the output is a power supply line output end. The device comprises a voltage boosting system and an electric energy quality boosting system, wherein the voltage boosting system comprises a voltage boosting compensation transformer, a voltage boosting power electronic converter and a voltage boosting control unit; and the electric energy quality boosting system comprises a contactor, an electric energy quality boosting compensation transformer, an electric energy quality boosting power electronic converter and an electric energy quality boosting control unit. According to the invention, the power electronic converter and the compensation transformer are used for injecting a current and a voltage into a power grid and performing real-time control, thereby achieving the comprehensive power quality improvement of power harmonic waves, power factors, three-phase imbalance compensation and the like and the voltage compensation function of a sparse power utilization area of a long power transmission line. The device has important significance on power supply radius extension, investment saving and power grid safety of the sparse power utilization area.

The invention discloses a target tracking method based on a conditional adversarial generation twinning network. The method comprises the following steps: (1) acquiring real-time video data for data preprocessing; (2) inputting the data preprocessed in the step (1) into a conditional adversarial generation twin tracking network consisting of a conditional adversarial generation deblurring network module and a full-convolution twin tracking network; and (3) embedding the conditional adversarial generation deblurring network module subjected to adversarial optimization into the full-convolution twinning tracking network framework subjected to feedback updating, and performing target tracking on the preprocessed real-time video data by using a conditional adversarial generation twinning tracking network subjected to online combination to obtain a target position. The dynamic adjustment capability of the tracking network is enhanced, the robustness of a tracker is improved, the tracking network is subjected to separation training in a transfer learning mode, the over-fitting phenomenon is prevented, the training time is shortened, and the generalization capability of the tracking network is improved.

The invention relates to an image processing method, an image processing device, and a non-transitory computer readable storage medium. The image processing method includes: acquiring an input image;and performing high dynamic range processing and denoising processing on the input image by using a neural network to obtain an input target image of the input image.

The invention discloses an in-tunnel vehicle automatic light changing system based on physiological comfortability. The system includes an illuminance detection unit, an index detection unit, an illuminance compensation device, an index adaptability device and a headlamp controlling device, the illuminance detection unit is connected with a photoelectric illuminance meter, and the input of the illuminance detection unit is connected with the illuminance compensation device; the input of the index detection unit is connected with a speed sensor, a heart-rate sensor, a myoelectricity sensor and an eye-movement device, the output of the index detection unit is connected with the input of the index adaptability device, the output of the index adaptability device is connected with the input of the illuminance compensation device, the illuminance compensation device and a timer are in both-way connection, and the output of the illuminance compensation device is connected with the headlamp controlling device. According to the system, a traditional tunnel lighting mode is changed, wherein in the traditional tunnel lighting mode, fixed lighting facilities are used as illumination compensation sources, and in the in-tunnel vehicle automatic light changing system, dynamic headlamps of mobile vehicles are used as the illumination compensation sources.

Proportional pressure control valve with a magnetic part and a valve part, the valve part has an inflow opening for the inflow stream, a first outflow opening for the filling stream, and a second outflow opening for the tank volume stream, and has a ball seat, a flat seat with an opening, a closing part for controlling the throughput quantity through the opening of the flat seat, and a stream diverter. The inflow opening faces away from the magnetic part and coaxially to its longitudinal axis, and the outflow openings are constructed on the side wall of the valve part radially to its longitudinal axis, so that fluid flowing from through the valve is exposed to a diversion of a maximum of 90°. The fluid, after flowing through the ball seat and to and through the stream diverter, experiences a diversion of less than 30°.

A magnetic friction clutch has two clutch parts, supported so that they can rotate relative to each other around an axis of rotation. A first clutch part has at least two clamping jaws which are movable somewhat toward and away from each other. A second clutch part, situated between the clamping jaws, is of disk-shaped design. The clamping jaws are pressable against the second clutch part by the magnetic force of a variable magnetic flux which is carried in the clutch parts in a soft magnetic material, in order to form a frictionally engaged connection between the clutch parts. The second clutch part has a plurality of soft magnetic ring zones permeated by the magnetic flux, which extend in the circumferential direction and are separated from each other in the radial direction by slots running in the circumferential direction. Ring zones adjacent to each other in the radial direction are connected with each other by bridging links. The slots are filled with a solidified casting material that connects the ring zones with each other. Inner and / or outer circumferential surfaces of the ring zones that face each other follow a line that deviates from a circular line running concentric to the axis of rotation. The second clutch part can have a plurality of layers made of different soft magnetic materials.

The invention provides a method for automatically adjusting voice transmission parameters. The method comprises the following steps: setting adjusted automated voice transmission parameters; obtaining a differentiated services code point (DSCP) value of a mobile communication system, and carrying out carrying and transporting network quality detection on the obtained DSCP value according to the adjusted automated voice transmission parameters; and determining to automatically promote voice transmission priority according to the carrying and transporting network quality detection results. The invention further provides a device and a system for automatically adjusting the voice transmission parameters. By adopting the method, the device and the system for automatically adjusting the voice transmission parameters, the problem of adjustment of the voice transmission priority caused by change of the carrying and transporting network quality can be solved, the transmission quality of the current carrying and transporting network can be detected conveniently, and the voice service transmission priority can be automatically adjusted, thus ensuring the voice quality of a mobile communication network and promoting the maintenance and operation level of the mobile communication network.

The disclosure relates to a liquid crystal display television and a method and apparatus for adjusting a backlight driving voltage of the same. The method for adjusting the backlight driving voltage includes: obtaining voltage feedback data by comparing a reference driving current and a backlight driving current during a driving process of a backlight source; carrying out over-voltage adjusting on the voltage feedback data to generate over-voltage feedback data; and adjusting the backlight driving voltage according to the overvoltage feedback data to perform over-voltage driving of the backlight source thorough the adjusted backlight driving voltage. Through adoption of the liquid crystal display television and the method and apparatus for adjusting the backlight driving voltage of the same provided by the disclosure, the responding speed of backlight of the liquid crystal display television in the backlight driving process can be raised.

A storage device 500 includes an input 405 for receiving a digital video stream complying with a predetermined video encoding standard via a digital video communication system. The stream includes a sequence of digital video frames, a sequence of program clock reference stamps (PCR) and a sequence of video presentation time stamps (PTS). A time-base modifier 510 replaces the PTS's by respective modified video presentation time stamps (M-PTS) based on a constant predetermined frame time between successive presentation time stamps and replaces the PCR's by respective modified program clock reference stamps (M-PCR) by scaling the PCR's using a scaling factor that depends on a ratio of an expected time between a video presentation time stamp j and a preceding video presentation time stamp j−n and an actual time between the video presentation time stamp j and the preceding video presentation time stamp j−n, where j≧n>0. The expected time is n times the predetermined frame time.

The invention discloses an inertia power coordination control system suitable for cogeneration of thermoelectric coupling solar energy. The inertia power coordination control system comprises the following stages: (1) establishing a solar thermal power generation subsystem model; (2) establishing a gas turbine subsystem model; (3) establishing a waste heat boiler and steam turbine mathematical model; (4) analyzing a thermoelectric conversion mathematical relationship of the solar combined heat and power generation system; (5) adding an inertia power compensation link; and (6) optimizing the time constant by applying a grey wolf algorithm, and improving the system performance, so that the method is suitable for a comprehensive energy system for grid-connected power generation of various devices, and the problem of system performance reduction caused by the response speed problem can be improved.

The invention discloses a transient process control method and system for a dual-active-bridge series resonant converter, and belongs to the field of direct-current converter control. Comprising the steps that when a transmission power instruction of the converter suddenly changes in the kth switching period, the difference between the transmission power Pk of the converter in the kth switching period and the transmission power Pk-1 of the previous switching period is obtained to obtain delta P, the size of the delta P and the minimum power instruction difference Pset of the transient process is judged, and if a transient event occurs, according to the phase shifting ratio, the difference Pset of the transmission power Pk of the converter in the kth switching period is judged to be smaller than the difference Pset of the transmission power Pk-1 of the converter in the previous switching period. And calculating the intermediate phase shift ratio of the rising edge and the falling edge of the lagging voltage in the kth switching period, performing modulation according to a transient driving modulation control method, and then recovering the steady-state phase shift ratio Dk from the (k + 1) th switching period to finish the transient process at the end of the kth switching period. Oscillation of inductive current and resonant capacitor voltage in the sudden change process of a power instruction can be eliminated, stable and rapid transition between two power levels is achieved in one switching period, and the dynamic performance of the converter is improved.

The invention relates to the field of circuit control, in particular to a frequency modulation control circuit of a resonant converter and a control method thereof. According to the invention, a sampling circuit, a control adjusting circuit, an analog-to-digital conversion circuit and a programmable unit are electrically connected in sequence, an electric signal output by the resonant converter is collected and is converted into the change of the corresponding driving signal, so as to control the output of the resonant converter. In other words, the excellent dynamic adjusting performance is achieved through analog adjustment in an analog and digital integrated control mode; meanwhile, the three-phase frequency modulation control signals output by the three-phase LCC resonant converter are good in consistency and high in phase precision, and the inter-phase self-current-sharing characteristic of the three-phase LCC resonant converter is good. Compared with an all-digital control method, a high-speed AD chip for signal acquisition is omitted, and the cost is greatly reduced.

The invention discloses an electrocar charging and advertising all-in-one machine system based on the Internet of Things. A user intelligent terminal scans a two-dimensional code on a charging pile display screen, then selects an unoccupied intelligent charging node, pays and starts to charge; the user intelligent terminal controls the charging capacity and the charging time through a remote server; the intelligent charging node is in signal connection with a center control gateway through a LoRa wireless module, and the center control gateway and the remote server build tcp are connected through a 4G module, so that bi-directional communication is carried out; the center control gateway collects data of the intelligent charging node, then uploads the data to the remote server through the4G module, is responsible for analyzing a command issued by the remoter server, and controls the intelligent charging node; and meanwhile, an advertising content is played through a display screen arranged on the intelligent charging node. The invention further discloses a terminal. The system is high in adaptability, the user can run advertising on the charging pile display screen, and a comprehensive application value is improved.

The invention discloses a cleaning robot, an intelligent control method and device thereof and a storage medium. The control method comprises the following steps: detecting a target position in a current working area through the cleaning robot to obtain a first ground feature detection parameter; after detection, controlling the cleaning robot to clean the target position for one or more times, and detecting the target position in the current working area again through the cleaning robot to obtain a second ground feature detection parameter; and comparing the second ground feature detection parameter with the first ground feature detection parameter, generating a real-time control instruction according to a parameter comparison result, and controlling the cleaning robot based on the real-time control instruction. Ground environment changes caused by cleaning can be detected based on different ground features before and after cleaning treatment, the working mode of the cleaning robot is adaptively controlled according to the environment changes, and the method has the advantages of being good in dynamic adjustment effect, good in real-time performance, high in intelligent degree and the like.

The invention provides an inverter and a control method thereof. The inverter is characterized in that a DC / DC circuit comprises a first boosting branch and a second boosting branch which are connected in parallel; and switching pieces in the first boosting branch and the second boosting branch are controlled by a controller. The configuration and control method of the controller are as follows: afirst voltage outer loop adjusting unit is configured to calculate and output a direct-current bus current expected value according to a direct-current bus voltage expected value and a direct-currentbus voltage real-time value; a first current inner loop adjusting unit is configured to calculate and output a control signal of the first boosting branch according to a direct-current bus current expected value and the chopping current of the first boosting branch; and a second current inner loop adjusting unit is configured to calculate and output a control signal of the second boosting branchaccording to the direct-current bus current expected value and chopping current of the second boosting branch. The DC / DC circuit of the inverter system adopts a double-path parallel boost chopper circuit, so that the high boost transformation ratio of the inverter under low-voltage input can be realized, and the low-voltage loading capacity of the inverter is improved.

The invention provides a bean sheet jelly primary pulp transporting and cooling system, and relates to the technical field of production manufacturing equipment of edible bean sheet jelly. The bean sheet jelly primary pulp transporting and cooling system comprises a cooling chamber, a conveyer belt bracket, multilayer conveyer belts which are mounted in the cooling chamber in a cooperating manner,a power device, a cooling device and a control device, wherein the conveyer belt comprises a feeding conveyer belt, multilayer first indoor conveyer belts and multilayer second indoor conveyer belts;the cooling chamber adopts a lateral cuboid structure with an opening in one horizontal end; the feeding transmission belt is arranged at the upper part of the top of the cooling chamber; the first indoor conveyer belts and the second indoor conveyer belts are longitudinally arranged in the cooling chamber at intervals, and are opposite in transporting directions; and the conveyer belt comprisesthe feeding conveyer belt, the first indoor conveyer belts and the second indoor conveyer belts, which are arranged at the end part in the horizontal direction in a left and right crisscross manner. The bean sheet jelly primary pulp transporting and cooling system disclosed by the invention has the advantages of being good in quality of obtained bean sheet jelly, high in efficiency, high in automation degree, low in labor intensity of workers and low in floor space.

The invention belongs to the technical field of logic control, and particularly discloses a refrigerating capacity distribution method which comprises the following steps: acquiring refrigerating requirements of a passenger compartment and a battery, executing a first logic if the passenger compartment has no refrigerating requirement and the battery has the refrigerating requirement, and executing a second logic if both the passenger compartment and the battery have the refrigerating requirement; the first logic comprises the steps that the refrigerant superheat degree is obtained, and the opening degree of the electronic expansion valve is controlled through a PID algorithm; the second logic comprises the steps that the battery working temperature is obtained, and the opening degree of the electronic expansion valve is obtained in combination with the preset battery working temperature-electronic expansion valve opening degree mapping relation. The invention further discloses a control system for the electronic expansion valve of the extended-range electric vehicle. The control system comprises a monitoring unit, a first cooling request unit, a second cooling request unit and a control unit. According to the scheme, a forced control scheme is reasonably set, serious overshoot of system control is avoided, meanwhile, the refrigerating capacity distribution is finely controlled, and the refrigerating requirements of the battery in different working conditions are better met.