354 results about "Automatic Generation Control" patented technology

The invention provides a realization method for a heat-engine plant speed regulating system model in power system simulation, wherein, not only a coordinated control system of a boiler and a steam turbine is simulated, but also a speed regulation control system of the stem turbine is simulated. A coordinated control system model comprises a realization method of the primary frequency control, the steam turbine master control, the boiler master control and the feedforward control. A model of the speed regulation control system of the steam turbine comprises a realization method of the primary frequency regulation and a valve actuator model. The realization method can correctly simulate the primary frequency regulation function of the heat-engine plant, realize different configuration ways of speed regulation control, in addition, the method can be applied to a boiler model and an automatic power generation control model and meet the requirements of the electromechanical transient state and medium-term and long-term dynamic simulation of the power system on dynamic system simulation of the heat-engine plant.

The invention provides a control method for coordination and automatic power generation of a coal quality self-adaptive thermal power generating unit. The method comprises the following steps of: 1, compressively determining the coal quality according to parameters including first-level pressure of a steam engine, drum pressure, coal feed, unit load and the like; 2, by the determined coal quality, performing the coal quality self-adaptive control over main control systems of fuel, coordination, air delivery and the like; 3, by core control strategies of boiler load commands, main steam pressure settings, a coal quality self-checking positive load upper limit and the like, realizing the control over the coal quality self-adaptive coordination and automatic power generation of the thermal power generating unit; and 4, realizing the automatic safe operation of the thermal power generating unit by improving safety locking conditions of the thermal power generating unit. The method has the following obviously advantages that: under a fluctuating condition of the coal quality of the thermal power generating unit, the automatic power generation and the coordination control of the thermal power generating unit are unnecessarily intervened by people, and the scheduling requirements are still met; and compared with the conventional control method, the control method of the invention has the advantages that: the accuracies of the main controlled parameters of the thermal power generating unit are further improved; and simultaneously, the automatic power generation control indexes and the safety and the economy of the thermal power generating unit are enhanced.

The exemplary embodiments described herein are related to techniques for automatically generating narratives about data based on communication goal data structures that are associated with configurable content blocks. The use of such communication goal data structures facilitates modes of operation whereby narratives can be generated in real-time and/or interactive manners.

The exemplary embodiments described herein are related to techniques for automatically generating narratives about data based on communication goal data structures that are associated with configurable content blocks. The use of such communication goal data structures facilitates modes of operation whereby narratives can be generated in real-time and/or interactive manners.

A method and apparatus for automatic gain control of a receiver provides compensation of gain control operations for received signal disruptions. In one embodiment, an automatic gain control circuit remembers control state information from a time just before a given disruption, and uses it to reset the automatic gain control circuit at the end of the disruption, or to maintain the automatic gain control circuit during the disruption. The remembering function may be triggered, such by detecting an impending disruption, or done periodically at a high enough update rate that the remembered information is always current with respect to any given disruption. Thus, an exemplary automatic gain control circuit may generate a receiver gain control signal by filtering received signal power measurements, and compensate the generation of that gain control signal by capturing filter state information just prior to signal disruptions. Compensation may comprise resetting or freezing the filter.

The invention relates to the field of electric power systems, and particularly to a diversified energy automatic generation control method considering wind power acceptance. The method comprises the following steps: classifying units according to different AGC adjustment performances and unit types, and dividing load changing tendencies (rising/declining/stable) by combining with a load prediction result; calculating an area control error ACE of a current region, and defining a zone (dead zone/help zone/secondary emergency zone/emergency zone) which the area control error ACE of the current region belongs to; and adopting different ACG adjustment tactics according to the differences of the load tendencies and ACEs. The method conducts classification on all units; the units match with each other to carry out the water-fire-wind combined automatic generation control; the frequency adjustment ability of a system is fully excavated to lower the frequency regulation reserve of the system; and the purpose of more accepting the wind power output is realized while the control quality is ensured.

An automatic operation vehicle control apparatus includes a contact detecting unit, an override detecting unit, and an automatic operation control unit. The contact detecting unit detects the presence of contact of a hand or hands of a driver with a steering wheel of a vehicle. The override detecting unit detects the presence of override on the steering wheel by the driver on the basis of the result of the detection by the contact detecting unit. The automatic operation control unit switches the operation mode at least including the automatic operation and the manual operation of the vehicle on the basis of the result of the detection by the override detecting unit.

A vital radio based automatic train control system that will interface seamlessly with existing onboard ATC equipment via existing track receiver inputs or directly. The invention provides a means of extending ATC signal territory with reduced equipment installation as compared to traditional cab or wayside based ATC. The invention can be used to reduce train braking distances and reduce headway. Furthermore, the radio cab signal can be used for additional purposes including but not limited to wayside equipment monitoring and rolling equipment monitoring.

A system and method for improving the traction of a vehicle uses weight distribution control to improve wheel to driving surface friction. A driven axle and a non-driven axle support a vehicle load through adjustable suspension members. The suspension members are, for example, air bags. Actuators and controllers adjust the suspension members in a selectable predetermined manner. The selection can be based on operator preference, vehicle operating mode, or a sensed loss of traction. The driven axle carries a drive axle maximum rated load in order to maximize drive wheel traction at all times.

A method and a device for search engine optimization, that receives an identifier that identifies a domain, one or more keywords for analysis relative to a search engine, and search engine usage data, for each received keyword, gathering search engine results data, for at least one received keyword, mapping the at least one keyword to at least one web page within the identified domain, said mapping based on at least one of said search engine usage data and said search engine results data, and for at least one of the received keywords, generating at least one instruction to modify a web page element in a web page to which the at least one received keyword is mapped.

The invention relates to the field of the renewable energy with grid-connected operating, in particular to a design method of an automatic generation control model under an intermittent energy grid-connection. The design method of the automatic generation control model under the intermittent energy grid-connection includes the steps of building second-dimensional disturbance source of time-amplitude disturbed by grid-connected intermittent energy, analyzing the power fluctuation feature of a grid, determining a distribution scheme for an automatic generation control (AGC) system assembly, determining the size and the type of the spare power supply of the AGC system, making a control strategy for the AGC system, selecting frequency deviation coefficient and determining the design parameter of automatic generation control model. The design method of the automatic generation control model under the intermittent energy grid-connection relates to the influences of a large-scale wind power and a solar photovoltaic power to a secondary frequency modulation of the power grid, can build an automatic generation control model and the parameter on the basis of the influence, and therefore effectively copes with an intermittent power disturbance of the wind power and the photovoltaic power supply, enhances the secondary frequency modulation effect of the power grid under the intermittent energy power supply fluctuation, and improves the acceptance ability of the power grid for renewable energy.

An automatic gain control system combining both analog and digital gain units, both controlled by a common digital control system. The overall system gain settings are selected by a combination of analog gain settings and digital gain settings. The number of analog gain settings is less than the total number of system gain settings, so that the board or chip area required for the analog gain settings is reduced, while sufficient range is provided to maintain a good signal to noise ratio from an A/D converter. When a required gain adjustment exceeds one step of the analog gain stage, the system simultaneously adjusts the analog gain and the digital gain unit to provide a smooth transition.

A system for automatic generation control in a wind farm is provided. The system includes a wind farm controller for controlling the plurality of energy storage elements. The wind farm controller receives an automatic generation control set point from an independent system operator, generates a farm-level storage power set point for the wind farm based on the automatic generation control set point, generates individual storage power set points for the plurality of energy storage elements based on states of charge of the respective energy storage elements, and controls the plurality of energy storage elements based on the individual storage power set points for dispatching storage power to perform automatic generation control.

The invention discloses an automatic generation method for routes and a device thereof, which are applied to a dynamic virtual private network (DVPN) comprising a VPN address management (VAM) Server and VAM Clients. The method comprises the steps that a login request is sent to the VAM Server by one VAM Client, and a private network address and the corresponding network segment of the VAM Client, which are carried in the login request, are obtained by the VAM Server; and when acknowledgement information responded by the VAM Server is received by the VAM Client, private network addresses and the corresponding network segments of other already-registered VAM Clients are obtained by the VAM Client from the VAM Server, and routes of the other already-registered VAM Clients are generated according to the obtained private network addresses and the corresponding network segments of the other already-registered VAM Clients. By adopting the automatic generation method for the routes, the route of each node in the DVPN can be automatically generated, and therefore the route generation efficiency of the DVPN is improved.

The invention relates to an active steering system combined with an electrical power-assisted steering function and a control method thereof, belonging to the field of vehicle steering systems. The system sequentially comprises a steering wheel, a steering input shaft, a planetary gear mechanism, a steering output shaft, a steering engine, a steering tie rod, a steering motor, a steering wheel angle sensor, a yaw velocity sensor, a lateral acceleration sensor and an ECU performing automatic steering control. The system is characterized by further comprising a steering wheel torque sensor mounted on the steering input shaft, a turbine worm retarding mechanism connected with the pinion of the steering engine, and a power-assisted motor connected with the turbine worm retarding mechanism; the ECU further receives the signal of the steering wheel torque measured by the steering wheel torque sensor and the speed signal acquired by a CAN bus so as to perform the steering system assistance and the return control as well as implement the electrically-assisted steering function. The system can improve the operation stability of the whole vehicle according to the operation condition of the vehicle, improve the road-feel of drivers, and ensure the vehicle to have stronger returnability.

A special drive system that provides automatic and uniform application control of granular materials. It provides an automatic application control of a granular material from a granular material spreader and is comprised of (a) at least one electric motor for driving the conveyor and spinner at a speed, the said speed which determines a rate of discharge of the granular material; (b) a power source for the motor; (c) a means for controlling the power from the power source to the at least one motor; (d) a means for inputting a signal to the means for controlling the power; (e) a wiring harness with control and power electrical connectors; and (f) a means to mechanically mount the special drive system to the grain spreader wherein the result of the system is an accurately controlled rate of discharge and hence dispensing of the granular materials.

An energy storage device system for a primary frequency modulation and automatic generation control (AGC) auxiliary regulation technology comprises a power generation set, a transformer, a power grid, a DC-AC converter and energy storage battery packs and is characterized in that a multi-port DC-DC converter is also arranged, so that connection ports of a plurality of energy storage battery packs are connected with respective port of the DC-DC converter, and at least one supercapacitor is also connected with the respective port of the DC-DC converter; and moreover, a load allocation system is used for receiving a dispatched AGC instruction or forming a load instruction according to a frequency of the power grid, the instruction is divided into two paths, one path passes through an energy management system to be connected with the multi-port DC-DC converter and the DC-AC converter, and the other path is connected with a distributed control system (DCS) and digital electric hydraulic (DEH) control system of the generation set to control the power generation set to work. Therefore, the peak load regulation capability of a power system can be improved, the primary frequency regulation ability and the AGC response capability of a coal-fired unit are improved, the stable running of a power plant is ensured, and energy is saved.

The invention relates to a FPGA (field programmable gate array) based digital AGC (automatic gain control) system and method of an ultra-short wave radio set. An RF (radio frequency signal) IN of a receiver is sent to a digital attenuator I to achieve an IF (intermediate frequency) signal through a mixer. One part of the IF signal enters a digital attenuator II, and the other part of the IF signal enters a detector for the detection. An IF-RSSI (received signal strength indicator), received by the detector, is converted into a digital signal by an A/D (analog/digital) converter and entered the FPGA. The signal processing is performed to the FPGA by adopting the sliding window smoothing algorithm to acquire average value of the IF signal. The FPGA judges according to the IF-RSSI. The digital attenuator I and the digital attenuator II are controlled through RFAGC (radio frequency automatic gain control), IFAGC 1(intermediate frequency automatic gain control) and IFAGC2, and a variable gain amplifier is controlled through an SPI interface to achieve constant output of the IF signal. By the use of the FPGA-based digital AGC system and method, automatic gain control on the RF signal reception is achieved within a wide dynamic range, thus the IF signal is maintained within a stable range, and smooth output of the IF signal is realized.

The invention discloses a method for participating in automatic generation control by controllable loads. Aiming at the conditions of increased adjustment complexity of a power grid and more diversified regulation and control means caused by the novel controllable loads in the power grid, the scattered controllable loads are aggregated and are enabled to be equivalent to virtual adjustable units whose outputs are negative values, parameters including an adjusting threshold and an adjusting range thereof are automatically calculated, the controllable loads are brought into a conventional automatic generation control system and participate in the adjustment of the power grid with other energies together, the automatic generation control is developed towards automatic power generation and consumption combined control, centralized cooperative control of the adjustable units of the whole grid is realized, the comprehensive regulation and control effect of the power grid is achieved to the maximum, and technical means is provided for interaction of the energies, the grid, and the loads.

The invention discloses a primary frequency modulation adjusting performance determination method of a generating set, and determination of primary frequency modulation adjusting performance is carried out on the generating set with automatic generating control. An improved additional weight integration electric quantity algorithm is provided in the invention, according to real contribution degree of primary frequency modulation to an electrical network, different weight coefficients are employed to carry out integration contribution electric quantity calculation on different frequency differences or time quanta in large and small frequency disturbances, thus primary frequency modulation motions of different generating sets can be distinguished scientifically, a correct rate and contribution electric quantity of the primary frequency modulation motion can be taken into consideration comprehensively to calculate deserved primary frequency modulation economy compensation, and through carrying out verification with real-time measurement data, the novel performance determination method is completely operable. An instance in the invention shows that the additional weight integration electric quantity algorithm has rationality compared with a common integration electric quantity algorithm.

The invention discloses an automatic gain control (AGG) self-excited oscillation driving circuit of a micro-solid modal gyroscope, which comprises an oscillation circuit formed by five parts including a charge amplifier, a phase shifter, an amplifier, a band-pass filter and an automatic gain controller, wherein a gyroscope vibration signal is firstly received and enhanced by the charge amplifier, and then phase adjustment is carried out on a signal output by the charge amplifier by the phase shifter, so that the self-excited oscillation condition of a closed loop drive circuit can be met; the signal is amplified by the amplifier, and then frequency-selecting is carried out on the amplified signal by the band-pass filter; after passing through the band-pass filter, the signal enters the automatic gain controller; the automatic gain controller is used for controlling gain according to the difference value between the obtained signal amplitude value and reference signal amplitude value; and finally, a sine driving signal with constant amplitude and stable frequency can be obtained, and a whole closed loop drive system is ensured to be stable. The AGG self-excited oscillation driving circuit can be used for providing the driving signal with constant amplitude and stable frequency to the micro-solid modal gyroscope, so that the problems of the existing closed loop drive circuit can be solved.

A structure and method for operating a directional control system for vehicle headlights that is capable of altering the directional aiming angles of the headlights to account for changes in the operating conditions of the vehicle. One or more operating condition sensors may be provided that generate signals that are representative of a condition of the vehicle, such as road speed, steering angle, pitch, suspension height, rate of change of road speed, rate of change of steering angle, rate of change of pitch, and rate of change of suspension height of the vehicle. A controller is responsive to the sensor signal for generating an output signal. An actuator is adapted to be connected to the headlight to effect movement thereof in accordance with the output signal. The controller can include a table that relates values of sensed operating condition to values of the output signal. The controller is responsive to the sensor signal for looking up the output signal in the table.

An automatic flow control mechanism that supports two modes of automatic flow control is provided in a network interface. In the first flow control mode, the network interface periodically compares the number of available receive descriptors with low and high threshold values. When the number of available receive descriptors falls below the low threshold value, the network interface sends a PAUSE frame requesting the link partner to suspend its transmission (in a full-duplex mode), or enables the back pressure mechanism (in a half-duplex mode). In the second flow control mode, when the network interface detects that the number of available receive descriptors is less than the low threshold value, it transmits a PAUSE frame requesting the link partner to suspend its transmission for a time period corresponding to a preprogrammed pause value (in a full-duplex mode), or enables the back pressure mechanism, at least, for a time interval defined by a pause timer loaded with the preprogrammed pause value (in a half-duplex mode).

The invention provides a method for simulating and analyzing automatic generation control of an electrical power system containing wind power. The method comprises the following steps of building a power grid model to which the wind power is connected, building a simulation platform external interface model, performing formatting processing to data changing with time in a power grid and inputting the data into the simulation platform external interface model, setting a simulation parameter and performing dynamic operation simulation, building a control performance index assessing and analyzing model, preserving and processing result data to a control performance index. The method is used for studying impact analysis of wind power connection to power grid dynamic frequency modulation, the simulation time can be calculated from second level to hour level and higher than hour level, and monitoring variables include power system frequency, interconnection power, conventional generator set power, wind farm power and the like and are used for quantitatively analyzing influence on power grid frequency control performance under the conditions of different wind power and providing reasonable suggestions for adjustment of a control method of an automatic generation control system. The method facilitates in-advance early warning of safe and stable operation risks of the power system after large-scale wind power is connected to the power system.

The invention discloses a maintenance support system of an automatic train control system, relating to the technical field of automatic train control. The maintenance support system comprises a maintenance monitoring server and a maintenance work station in interconnection, and the maintenance monitoring server and the maintenance work station are respectively connected with the automatic train control system. In the invention, a maintenance module of each subsystem in the automatic train control system is cancelled, the maintenance data in each subsystem is collected and managed in a unified way via the maintenance monitoring server, so that the maintenance information of each subsystem is shared, and the cost and the operating difficulty are reduced.

The invention discloses an environmental simulator suitable for an ATC. The simulator comprises a vehicle equipment simulation subsystem, a trackside zone controller (ZC) simulation subsystem, a computer-based interlocking (CBI) simulation subsystem and an automatic train supervision (ATS) simulation subsystem; the application logic of a real target system is directly adopted in the simulator and simulation subsystems and real targets can operate simultaneously; and the simulation systems simulate a plurality of trains, a plurality of trackside ZCs, and a plurality of CBIs respectively and simulate the operating condition of a whole line. According to the simulator, simulation of the whole line is provided, the operating scenes of real lines are simulated, all fault injection combinations of tests among the subsystems are provided, an approximately real complete simulated environment of the ATC is provided, the problem of integration testing of the ATC is solved, the processing logic identical with targets is adopted, and the simulation degree is high.

The invention discloses a method and equipment for controlling an energy storage device. The maximum power of the energy storage device is set as PMAX. The method comprises the following steps of: receiving an automatic generation control (AGC) instruction from an electricity grid, wherein the AGC instruction comprises a target power PAGC of output electric energy; detecting an actual power PGEN, generated by a generator according to the AGC instruction, of the output electric energy; when the target power PAGC is greater than the actual power PGEN, controlling the energy storage device to supply the electric energy within an interval between 0 and PMAX; or when the target power PAGC is smaller than the actual power PGEN, controlling the energy storage device to absorb the electric energy within the interval between 0 and PMAX. Generation equipment which is provided with the energy storage device can respond to the AGC instruction of the electricity grid more quickly and more accurately, and the generation equipment has higher ability to help an electric power system to solve the problems of power balance and frequency fluctuation, so the stability and reliability of the whole electric power system are improved.

A satellite digital radio broadcast receiver has an integrated circuit including a first reception series for processing a satellite wave signal from a satellite and a second reception series for processing a ground wave signal from a repeater in order to receive both the satellite wave signal and the ground wave signal having the same broadcast contents and different modulation methods. The receiver has an automatic gain control unit for amplifying a signal from a single antenna at a variable gain amplifier, and in accordance with the level of a signal outputted from the variable gain amplifier, for controlling the gain of the variable gain amplifier; and a two-way distributor for distributing an output of the automatic control unit to two distribution outputs, wherein one distribution output of the two-way distributor is supplied to the first reception series of the integrated circuit and the other distribution output is supplied to the second reception series of the integrated circuit.

An automatic gain control (AGC) technique and apparatus is introduced herein for any temporally non-uniform ion beam, such as, for example, an ion beam produced by a MALDI ion source so as to minimize space charge effects. The disclosed configurations and techniques can be achieved by using an ion optical gating element and applying a desired signal waveform (e.g., a square wave) having a predetermined duty cycle. The applied voltage amplitude of such a signal can be configured to switch between a voltage which fully transmits the ions, and a voltage which does not transmit any ions. The frequency is chosen to result in a period which is significantly lower than the smallest non-uniformity period. Techniques of the present invention can also be extended to methods of AGC which can use a single ion injection event from the ion source to avoid variations in ion numbers from an unstable ion source.

The invention discloses a primary frequency modulation and virtual inertia response control method and device for a wind power plant station and belongs to the technical field of power grid frequency modulation. The wind power plant station comprises a wind turbine generator set and a centralized flywheel energy storage array system connected with the wind turbine generator set. The method comprises the following steps of: receiving instruction information issued by an automatic power generation control system, acquiring voltage, current and power grid frequency at the grid-connected point of the wind power plant station in real time; and controlling the wind turbine generator set and the centralized flywheel energy storage array system to perform primary frequency modulation or virtual inertia response according to the voltage, the current, the power grid frequency and the frequency change rate corresponding to the power grid frequency. According to the method and device of the invention, the centralized flywheel energy storage array system is configured in the wind power plant station, and the centralized flywheel energy storage array system is controlled to charge and discharge to participate in the primary frequency and virtual inertia response of a power grid, so that the wind turbine generator set has primary frequency modulation and inertia response capabilities under full-working-condition operation, and the stability and disturbance rejection of the wind turbine generator set are improved; and the operation economy of the wind power plant station is improved.