54 results about "Frequency coordination" patented technology

Techniques are provided for frequency coordination among two different wireless network protocols, such as the IEEE 802.11 and Bluetooth protocols, operating in proximity with one another. Coordination is accomplished by the use of a first radio transceiver operating in accordance with a first communication protocol (which may be the 802.11 protocol) and using a frequency band (which may be the 2.4 GHz band), a base station connected to a wired network and operating in accordance with the first communication protocol, a second radio transceiver operating in accordance with a second communication protocol (which may be the Bluetooth protocol) and using the frequency band, and a coordinator associated with the base station for, in turn, activating the first radio transceiver, deactivating the first radio transceiver, activating the second radio transceiver, and deactivating the second radio transceiver.

A broadband local area data network uses coaxial cable wiring for interconnection of terminal devices. Orthogonal frequency division multiplexing (OFDM) with bit loading is used to overcome channel impairments and provide a path for terminal devices to transmit to and receive from other terminal devices. Probe messages are sent between devices to characterize the communication channel and determine optimum bit loading. The data network shares the cable spectrum with other services and uses frequency bands not used by other services. Adaptive power control can be used to maintain signal to noise ratio in a communication between terminal devices. Frequency coordination can be used to avoid interference between the LAN communications and other services transmitted on the cable.

Techniques are provided for frequency coordination among two different wireless network protocols, such as the IEEE 802.11 and Bluetooth protocols, operating in proximity with one another. Coordination is accomplished by the use of a first radio transceiver operating in accordance with a first communication protocol (which may be the 802.11 protocol) and using a frequency band (which may be the 2.4 GHz band), a base station connected to a wired network and operating in accordance with the first communication protocol, a second radio transceiver operating in accordance with a second communication protocol (which may be the Bluetooth protocol) and using the frequency band, and a coordinator associated with the base station for, in turn, activating the first radio transceiver, deactivating the first radio transceiver, activating the second radio transceiver, and deactivating the second radio transceiver.

One or more coordinating devices may be utilized to control high speed data transmission among a plurality of wireless devices utilizing 60 GHz for high speed data transmission. Control messages may be sent and/or received between each of the plurality of wireless devices and the one or more coordinating devices utilizing low rate control connections via available secondary physical layers. The secondary physical layers may comprise Bluetooth, 802.11, and/or UWB physical layers. The controlling may comprise time coordination, frequency coordination, and/or spatial coordination that may enable the wireless devices to align and/or position directional antenna that may be utilized to perform the 60 GHz high speed data transmission. The wireless devices may utilize the low rate control connections to communicate reporting messages to the one or more coordinating devices. The reporting information may enable the one or more coordinating devices to manage available resources in the plurality of wireless devices.

The invention discloses a wireless charge control method based on coordination control over the voltage and the frequency of a power supply. The wireless charge control method mainly aims to meet the requirement for wireless charge power stability of an electric vehicle. A system mainly comprises the power supply, a transmitting device, a receiving device, a rectification and conversion device, a storage battery, a wireless transmitting and receiving module and a power tracking controller, wherein the frequency and voltage of the power supply are adjustable. According to the wireless charge control method based on the coordination control over the voltage and the frequency of the power supply, the resonant coupling type wireless electric energy transmission technology is adopted, the terminal voltage and the charge current of the storage battery serve as feedback, and constant-power or constant-voltage charge of the storage battery of the electric vehicle is realized through dual-ring coordination control over the power supply frequency and supply voltage. According to the wireless charge control method based on the coordination control over the voltage and the frequency of the power supply, the wireless charge power stability of the electric vehicle is effectively realized by the adoption of a control algorithm based on parameter feedback and double-variant coordination control, and the robustness of the system in operation is improved.

Disclosed is a semiconductor IC device using a low-price oscillator, which is capable of bidirectional communication with a host and features a low price. In bidirectional communication between a host and a device, the device comprises a synchronization establishment unit, a frequency difference detector, a frequency generator, and an oscillator providing a reference signal. The synchronization establishment unit to which an output signal from the host is inputted outputs a received signal, a synchronization establishment signal and a reception data. The frequency difference detector detects a frequency difference between a received signal and a transmitting signal, and outputs a frequency coordination signal to the frequency generator. The number of frequency division of the frequency generator is controlled by the frequency coordination signal, and the frequency generator is capable of matching the frequency of the transmitting signal which is an output signal with the frequency of the received signal.

The invention provides a hybrid energy storage power coordination control method in a combined light storage power generation system. The method comprises steps that, dual-layer control on the combined light storage power generation system is employed, and power distribution of a hybrid energy storage unit is realized through frequency coordination control; according to available capacity apportionment instruction power of the hybrid energy storage unit, management on expect frequency absorption or emission of each current transformer is carried out. Through the method, impact of high frequency photovoltaic fluctuation components on the electrical network is reduced, schedulability and electrical network friendliness of a distributed photovoltaic power generation system are improved, and a new method is provided for operation and control of the combined light storage power generation system.

The invention discloses a coordination control method of VSC-HVDC (voltage source converter based high voltage direct current) alternating-current voltage-frequency for improving the transient stability of an alternating-current system. An alternating-current voltage-frequency coordination control target is increased in a transient state control target of a VSC station; the control strategy can be involved in transient state control of voltage and frequency of the alternating-current system by utilizing reactive and active rapid adjustment capability of VSC-HVDC respectively on the premise of guaranteeing the running safety of VSC-HVDC equipment. Based on the strategy, the invention designs a VSC controller structure capable of controlling the target priority ranking seriously, so that the transient state stability of voltage and frequency of a weak alternating-current power grid linked to the VSC can be improved effectively.

The invention relates to a communications and/or navigation system based on a constellation of non-geostationary satellites in orbit around the terrestrial globe. The constellation has satellites grouped in pairs, and has orbital planes that are also grouped in pairs. The pairs of orbital planes are mutually spaced apart by an angle that is different from the spacing between the orbital planes in a pair of orbital planes, and the satellites in a pair have orbital phase offsets different from the orbital phase offset between pairs of satellites in different pairs of orbital planes. This type of constellation makes it possible to ensure continuous coverage, via at least one satellite, of a geographical zone of interest, while taking into consideration the frequency-coordination constraint.

The invention discloses a frequency coordination control method of an electric system containing wind power. The method comprises the steps of preparing a switching plan of a deep peak regulation state of a thermal power generating unit by utilizing an ultrashort prediction result of wind power on a prediction level based on an improved frequency analysis model, and then performing frequency coordination control of the system under real-time wind power injection by utilizing the switching plan of the deep peak regulation state on a real-time level. The frequency coordination control method improves the frequency stability of the system, is applicable to an interconnected network with high wind power permeability, and has a good popularization value and a good application prospect.

The invention discloses a frequency coordination control method specific to send-out islands of multiple direct current circuits. When a system suffers from a single-pole or dual-pole direct current locking failure, emergency frequency control on an island power grid with severe faults is performed by adopting a direct current power improving instruction (RUNUP), a direct current frequency limiter (FLC) and control measures of performing primary frequency modulation on a generator speed regulator and performing steady control on power cutting in turns. The frequency coordination control method is applicable to a multi-loop direct current transmitting end system with a concentrated control main station.

The invention relates to a load frequency coordination control method of a fan-participated frequency modulation wind-diesel hybrid power system. The wind-diesel hybrid power system comprises a wind power generation sub-system and a diesel engine sub-system. The load frequency coordination control method comprises the following steps of (1) using a power output of the wind power generation sub-system as a control input of the diesel engine sub-system, establishing a system state equation and using a sliding-mode controller to calculate the control input u (t) of the diesel engine sub-system in the hybrid power system; (2) using the u (t) obtained in the step (1) through calculation as a control instruction of the wind power generation sub-system, adopting a PID variable pitch control method to control the output power of a wind driven generator according to the control instruction and optimizing the frequency deviation of the whole hybrid power system. Compared with the prior art, the load frequency coordination control method has the advantages of being high in control accuracy, effectively improving the load frequency deviation of the hybrid power system and the like.

The invention relates to a dynamic power system load frequency coordination method based on frequency division control. The dynamic power system load frequency coordination method comprises the stepsof: 1) constructing a dynamic power system model considering communication time lag and comprising a doubly-fed wind power generation system and a thermal power generation system; 2) applying hybrid deviation to frequency management of the doubly-fed wind power generation system and the thermal power generation system by means of a frequency divider; 3) for a thermal power generator set, designingdouble-loop compensation control based on a low-frequency component of the hybrid deviation, so as to improve robustness and dynamic response of load frequency control; 4) and for a doubly-fed wind turbine generator set, designing a proportional-integral controller based on a high-frequency component of the hybrid deviation so as to support frequency adjustment of the thermal power generator set,and optimizing a multi-objective function by utilizing a particle swarm optimization algorithm to obtain PI controller parameters. Compared with the prior art, the dynamic power system load frequencycoordination method has the advantages that the system robustness is high, the doubly-fed wind power generation system can assist in system frequency management, the load frequency deviation is smaller, the recovery speed is faster and the like.

The invention relates to an electric vehicle and temperature control load polymer response-based frequency synergic control method. The electric vehicle and temperature control load polymer response-based frequency synergic control method comprises the following steps of identifying response demand DP of a power system, and determining a current controllable electric vehicle in a grid, a temperature control load and working states thereof; building a controllable domain of a single electric vehicle and a hot pump, and calculating an electric vehicle state label SOB and a hot pump state label SOT; calculating a polymer parameter of a load; calculating required total power change quantity DPR0<EV> and DPR0<HP> of the vehicle and the hot pump when parameters R<EV> and R<HP> becomes 0; calculating alternative values of an adjustment signal DP<EV> issued to the electric vehicle and an adjustment signal DP<HP> issued to the hot pump; and verifying whether the alternative values of the DP<EV>and the DP<HP> exceed a frequency adjustment capability range of the polymer, correcting the alternative values if yes, determining final values of the DP<EV> and the DP<HP>, and generating the finalvalues in the electric vehicle polymer and the temperature control load polymer.

The invention provides a field strength measurement method and apparatus for a modulation signal, belongs to the field of radio monitoring, and particularly relates to the field strength measurement in a radio monitoring system. The field strength measurement is an important subject of parameter measurement in the field of radio monitoring, and an important measure for realizing authorizing whether a normal transmitted power of a service exceeds a provision, electromagnetic compatibility analysis, electromagnetic environmental testing, transmission phenomenon testing, collection of atmosphere radio noise data, and coordinating of frequencies in or out of a border. The purpose of the invention is to realize the field strength measurement to the modulation signals in optional bandwidths aiming at the problems that the current field strength measurement device only can carry out field strength measurement on a certain frequency point under a certain RBW (Resolution Bandwidth) condition and cannot give out a complete field strength measurement result in a signal bandwidth to the modulation signal with a certain bandwidth, and the well automation performance is realized. The method and the apparatus, provided by the invention, have the advantages of strong signal adaptability and high degree of automation.

The invention relates to a multi-source microgrid frequency coordination method based on adaptive robust control. The method comprises the following steps: (1) constructing a multi-source microgrid system containing a plurality of groups of photovoltaic systems, a diesel engine system, an energy storage system and various types of loads; (2) setting the frequency modulation power of the photovoltaic systems to obtain the adjustable frequency deviation ranges of the photovoltaic systems, and setting a frequency deviation threshold value according to the adjustable frequency deviation ranges; (3) proposing a frequency coordination strategy so that coordinated operation is carried out on the photovoltaic systems and the energy storage system according to the frequency deviation threshold value, and participating once frequency adjustment of the multi-source microgrid system; (4) constructing a sliding mode load frequency controller based on the diesel engine system; and (5) taking the output command of the sliding mode load frequency controller as the compensation dosage of twice frequency adjustment of the diesel engine system, and completing frequency coordination in combination with the proposed frequency coordination strategy. Compared with the prior art, the multi-source microgrid frequency coordination method has the advantages of actively participating frequency adjustment,being high in robustness, reducing frequent action and power configurations of the energy storage system and the like.

A method is provided in one example embodiment and may include negotiating power domain interference coordination (PDIC) parameters between a macro cell radio and at least one small cell radio; determining successive interference cancellation (SIC) parameters for each of one or more user equipment (UE) that are to perform SIC for one or more transmissions; and sending the SIC parameters to each of the one or more user equipment. Negotiating PDIC parameters can include determining, by the macro cell radio and at least one small cell radio, one or more physical resource blocks (PRBs) for which transmission power levels can be coordinated for a plurality of frequencies in a frequency domain and a plurality of subframes in a time domain and exchanging PDIC parameters between the cell radios in order to perform PDIC transmissions for UE served by the cell radios.

A data delivery control method of a large-scale wireless electronic label system is low in cost, realizes the ultra-long transmission distance and the ultra-low power consumption, has the high business effectiveness requirement, is reliable to work, is suitable for an internet of things large-scale wireless electronic label system, and realizes the internet of things data efficient transmission. The delivery control method of the present invention achieves the purpose of transmitting the large-scale label cluster real-time data by realizing the multi-frequency coordination work, dynamically calculating and pre-estimating the congestion access statuses of the channels, and provides a solution scheme which is detailed and has a certain practicality and reference for a star-like topology internet of things large-scale cluster node data transmission method.

The invention discloses a load prediction-based frequency modulation control method for an energy storage type hydraulic wind generator set. A control system comprises a wind wheel module, a hydraulicmain drive system module, a hydraulic energy storage system module, a generator grid-connection module and a prediction module. Future load condition is predicted according to detected power grid data. When load fluctuation is predicted, a pitch angle of the wind wheel module, a variable motor swing angle of the hydraulic main drive system module and active power output by a variable pump/motor swing angle control system of the hydraulic energy storage system module are controlled, so that a frequency of a generator is stabilized through advanced response to the load fluctuation. A principleof coordinating the active power is starting regulation and control to compensate the response hysteresis of the element when the fluctuation is about to start according to a prediction result. The variable pump/motor swing angle is regulated and controlled preferentially, the power input into the generator is adjusted through regulation and control over the variable motor swing angle, and meanwhile, the pitch angle of the wind wheel module is controlled. The input wind power is changed, so that the frequency of the system is stabilized.

The invention relates to the field of satellite terminal radio frequency, in particular to a portable terminal radio frequency channel based on frequency coordination. The channel comprises a transmitting channel, a receiving channel and a dual-rotation circularly polarized antenna, and is characterized in that the transmitting channel performs digital-to-analog processing on data received from a baseband and performs up-conversion amplification to form a radio frequency signal transmitted by the antenna, the receiving channel converts a received radio frequency signal into a low frequency signal, the low frequency signal is sent to the baseband after analog-to-digital conversion, the dual-rotation circularly polarized antenna is used for transmitting and receiving the radio frequency signal, a narrowband signal and a broadband signal in a downlink signal are received by the same rotation direction antenna, and a narrow-band signal and a broadband signal in the uplink signal are transmitted by the left-handed circularly polarized antenna and the right-handed circularly polarized antenna respectively; and both the transmitting channel and the receiving channel adopt zero intermediate frequency sampling structures. Based on the requirements of frequency coordination on the rotation directions of antennas of different frequency bands, narrowband signals and broadband signals are received, combined and transmitted, and a zero intermediate frequency structure is adopted to reduce the power consumption of a radio frequency channel and reduce the volume and the weight.

An embodiment of the invention provides a two-end DC asynchronous interconnected grid frequency coordinated control method and device and belongs to the technical field of electric power system analysis. The method comprises the following steps: for any power grid, determining a DC power set value from any power grid to other power grids according to additional power and a DC power set value of anormal scheduling plan, and performing DC additional frequency control; and according to frequency difference integral of any power grid, determining an automatic power generation control mode of anygrid and calculating area control error of the power grid, and performing grid automatic power generation control. Through DC additional frequency control, mutual power support in case of emergency isprovided, and then, through automatic power generation control of each grid, frequency and DC power of each grid can be recovered automatically in general case, so that through coordination of the DCadditional frequency control and the power grid automatic power generation control, frequency coordinated control of each power grid is realized.

The invention provides an over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method. The method comprises the following steps of: 1) providing a load reduction operation scheme for an variable speed wind turbine generator set; 2) determining that the variable speed wind turbine generator set operates according to the load reduction operation scheme; 3) judging whether the variable speed wind turbine generator set participates in system frequency modulation; and 4) activating a primary frequency modulation control module to enable the variable speed wind turbine generator set to participate in the system frequency modulation. With the method adopted, changes of the kinetic energy of a wind turbine are fully considered when active spare capacity is reserved, and the output capacity of the wind turbine itself can be effectively utilized; and when power?shortage occurs on a system, and the frequency of the system is decreased, continuous active power support can be provided, and improvement of the stability of the frequency of the power system can be facilitated.