985 results about "Power balancing" patented technology

Immediately before transmitting a packet signal, a packet transmission base station (BS1) increases a target ISR of UL DPCH (S12), increases the TPC transmission power transmitted by the DPCH (S13), increases a power balancing reference power, and increases a DL DPCH transmission power (S14). In a mobile station (MS3), during packet reception, only a packet transmission base station (1) controls the UL DPCH transmission power (S15). This improves the reception quality at the base station (1) of HS-DPCCH including ACK / NACK and reduces the error ratio of the ACK / NACK signal.

A method for managing the power consumption of an information handling system including a processor and an associated cooling system. The method may include providing power to the cooling system based on a performance / power balance setting, accepting a user input to adjust the performance / power balance setting, and adjusting the power provided to the cooling system based on the adjusted performance / power balance setting. The performance / power balance setting may define a balance between performance of the processor and power consumption of the associated cooling system.

A power system for car is composed of drive motor, motor drive controller, fuel battery, unidirectional high-voltage DC / DC converter, vehicle controller, high-energy power accumulator set and its management unit, super capacitor, and bidirectional DC / DC converter. Its advantages are high power performance and safety, and low cost.

Apparatus and methods to minimize wafer-to-wafer process variation in RF-based semiconductor processing reactors with shared RF source for multiple processing areas. RF sensors associated with each processing area sends signal to the RF balance controller. The controller modifies station impedance using power adjustment mechanisms. As a result, station to station distribution of a selected RF parameter (e.g., load power) may match the station set points. Closed loop control maintains balance despite changing conditions.

The invention discloses a variable power point tracking control method of a two-stage type no-energy-storage photovoltaic virtual synchronization machine, and belongs to the technical field of new energy power systems and micro-grids. The variable power point tracking control method comprises the steps of changing an original single augmented variable mode into a mode of judging whether an SUdc(k) represented DC bus voltage value is steady based on a DC bus voltage through improving the conventional perturbation observation MPPT (Maximum Power Point Tracking) method for DC / DC circuit control in a two-stage type photovoltaic system; and giving full play of a regulation effect of a DC / DC converter on the output power of a photovoltaic battery. Inertia support for the virtual synchronization machine and energy supply needed by one regulation are realized under the precondition of not adding any energy storage device; and control of the photovoltaic virtual synchronization machine is realized by combining a VSG control strategy of an inverter. When a load changes suddenly or the external environment condition changes, the photovoltaic system can reflect the characteristics of the synchronization machine, can keep steady system voltage / frequency and power balance, and can realize variable power point tracking relevant to the DC bus voltage.

A transmission power control system can establish synchronization by matching adjustment start timings while repeating adjustment periods even when start timings of transmission power balance adjustment are different due to fluctuation of transmission delay of control message from the control station to base station, and can increase circuit capacity by establishing balance of transmission powers between the base stations. In the transmission power control system the base station comprises control means for controlling initiation of a balance adjustment period for performing the balance adjustment from a frame number determined on the basis of frame number of the balance adjustment period.

The invention relates to a power balancing-based non-uniform clustering method for a cluster wireless sensor network, relating to wireless communication technologies. The method comprises the steps of dividing a wireless sensor network monitoring region with uniformly distributed nodes into a non-uniform a ring, determining the positions of cluster head nodes according to an equivalent distance method, ensuring a reliability link index deltap of end-to-end communication between the cluster head nodes to cluster nodes, and setting up an energy consumption solving equation. An optimal ring radius vector is obtained by optimizing parameters of the energy consumption solving equation of the cluster head nodes with a steepest gradient descent algorithm based on the idea of 'power-balancing'. The cluster size is finally obtained by adjusting the positions and the transmission power of the cluster head nodes in accordance with the optimal ring radius vector, so as to balance energy consumption among the cluster head nodes and prolong the network life cycle. The method remarkably prolongs the network life cycle, improves the efficiency of the routing protocol and the media control protocol, and provides a support basis for time synchronization, data integration and target positioning technologies.

A method and apparatus is provided for power balancing an optical signal wavelength to be added to an OADM having at least one drop port and at least one add port. The method begins by monitoring a power level of a first signal wavelength being dropped on the drop port and a power level of a second signal wavelength being added on the add port. The power level of the first signal wavelength is compared to the power level of the second signal wavelength. Based on the step of comparing, the optical attenuation is adjusted along the add port so that the power level of the second signal wavelength becomes substantially equal to the power level of the first signal wavelength.

A double-longitudinal-mode laser frequency-offset-lock method and a device based on cavity length thermal regulation belong to the application technical field; the invention takes the frequency of laser output by a power balanced type double-longitudinal-mode frequency stabilization laser A as a reference frequency, and simultaneously leads the frequency of laser output by the double-longitudinal-mode laser A with n being more than or equal to B1, B2,..., Bn to keep one fixed difference with the reference frequency, thus ensuring that the laser output by the double-longitudinal-mode laser B1, B2,..., Bn has uniform frequency value, the frequency stability and frequency consistency of the double-longitudinal-mode laser can reach 10<-8>, thereby overcoming the shortcoming that the frequency consistency between frequency stabilization lasers only reaches 10<-6>-10<-7> in the traditional frequency stabilization lasers.

An improved and extended Reed-Solomon-like method for providing a redundancy of m≧3 is disclosed. A general expression of the codes is described, as well as a systematic criterion for proving correctness and finding decoding algorithms for values of m>3. Examples of codes are given for m=3, 4, 5, based on primitive elements of a finite field of dimension N where N is 8, 16 or 32. A Horner's method and accumulator apparatus are described for XOR-efficient evaluation of polynomials with variable vector coefficients and constant sparse square matrix abscissa. A power balancing technique is described to further improve the XOR efficiency of the algorithms. XOR-efficient decoding methods are also described. A tower coordinate technique to efficiently carry out finite field multiplication or inversion for large dimension N forms a basis for one decoding method. Another decoding method uses a stored one-dimensional table of powers of α and Schur expressions to efficiently calculate the inverse of the square submatrices of the encoding matrix.

The invention dsiclsoes a microgrid system with an asymmetric non-linear load and a power balancing control method. The system comprises a plurality of DG units connected in parallel and line impedors connected with all DG units. The line impedors are connected to a microgrid bus by PCC points. A three-phase balancing resistive load, an asymmetric linear load, and a diode rectifier non-linear load of a load unit are connected to the microgrid bus by PCC points. A measurement module for measuring voltage fundamental wave positive sequence and negative sequence components and harmonic wave components of the PCC points is also connected to the microgrid bus. The microgrid bus is connected with a 10-kV main power grid by a static switch and a transformer successively. According to the invention, reactive and harmonic power balancing of the microgrid is realized by using a selective virtual impedance based on the virtual fundamental positive and negative sequence impedance and the virtual variable harmonic impedance; a harmonic and unbalancing voltage compensation controller enables equal division of an unbalanced power and a harmonic power to be realized; and a problem of unbalancing of the harmonic wave and the voltage of the microgrid can be solved.

Embodiments of the invention relate to a system and method for dynamically scheduling resources using policies to self-optimize resource workloads in a data center. The object of the invention is to allocate resources in the data center dynamically corresponding to a set of policies that are configured by an administrator. Operational parametrics that correlate to the cost of ownership of the data center are monitored and compared to the set of policies configured by the administrator. When the operational parametrics approach or exceed levels that correspond to the set of policies, workloads in the data center are adjusted with the goal of minimizing the cost of ownership of the data center. Such parametrics include yet are not limited to those that relate to resiliency, power balancing, power consumption, power management, error rate, maintenance, and performance.

Multiple systems for delivering satellite signals are described. An embodiment in accordance with the present invention comprises a receive antenna, including at least one low noise block amplifier (LNB), and a module, coupled to and proximate the receive antenna, the module comprising a multiswitch, coupled to the LNB, for directing the satellite signals received by the LNB to a plurality of outputs of the multiswitch, a plurality of tuners, respectively coupled to the outputs of the multiswitch, for tuning to a plurality of specific portions of the satellite signals in a respective fashion, the specific portions of the satellite signals selected based on commands received from a plurality of receivers, and an interface for delivering the specific portions of the satellite signals to the plurality of receivers, wherein the specific portions of the satellite signals are combined into a single combined signal and delivered to the plurality of receivers on a single output of the interface.

The invention relates to a flywheel array energy storage system with flywheel energy storage units connected in parallel, which consists of a public direct current bus, a grid-connected static switch, a brake resistor, a flywheel array controller and at least two or more flywheel energy storage units and unit controllers thereof, wherein the internal structures and parameter features of the flywheel energy storage units are identical. Each flywheel energy storage unit is connected into the public direct current bus in a current source mode, and the number of the connected units can be increased and decreased casually. A master-slave control mode is adopted in the flywheel array energy storage system disclosed by the invention, power needed for maintaining direct current power grid power balance is computed by the flywheel array controller used as a master controller, and the power is distributed to each flywheel energy storage unit controller by a coordination control algorithm; and a bi-directional power conversion circuit and a permanent magnet synchronous motor are controlled by the unit controller used as a slave controller according to the obtained power instruction in a flywheel energy storage unit control method to absorb or release power to a direct current power grid.

The invention discloses a method for processing a constraint condition in a constraint optimization problem and updating a global optimal position and an optimal position of a particle swarm optimization algorithm. The research on a multi-objective optimization algorithm lays a solid foundation for the following research content. According to the capacity optimal configuration method, a multi-objective optimal configuration mathematical model for capacity of the microgrid energy storage system is established; aiming at the optimal power balance, the minimal renewable energy fluctuations and the lowest investment cost, the configuration of the microgrid energy storage system is analyzed from the perspectives of power amplitude limiting, discharge and charge management of the energy storagesystem and the like; and a multi-objective random optimal configuration model based on a Pareto optimal solution is given, thereby fully illustrating that the microgrid energy storage system optimal configuration strategy disclosed by the invention can effectively match a renewable energy resource with a balanced matching coefficient of a load, and effectively realize quantitative configuration ofthe microgrid energy storage system.

The invention belongs to the field of distribution network dispatching and managing, which provides a wind-light storage combined dispatching method and system used for distributed microgrid island operation. According to collected real-time data as well as photovoltaics and fan power generation and power load prediction data obtained by calculation, the total output power of photovoltaics and fan and a load and energy storage inverter system are coordinated and controlled to satisfy the requirement of system power balancing; the energy storage and the load of the photovoltaics, a fan and a storage cell are considered in a coordinating mode; a control signal is emitted to cause each inverter to output active power required by a microgrid system to achieve the optimal energy use ratio; therefore, the microgrid system can integrate the power generation and power consumption situations between three systems of a fan system, a photovoltaic system and an energy storage system and load so as to coordinate each subsystem to effectively operate; when an external grid is detected to restore to be normal, the microgrid system is switched to a grid-connected operation mode according to a grid-connected and island mode switching control strategy, and the economy and the stability of the microgrid system in the island mode can be improved.

The invention relates to an online evaluation approach to evaluate the maximum power supply capacity of urban power network, belonging to the technical field of advanced application of electric power system dispatching. The method employs data base connection modes(ADO and ODBC), reads the relative network topology and network nodes in EMS and analyses the topology of the urban power network by means of an adjacency matrix to build up a model for calculating the maximum power supply capacity of the urban power network; the model is a linear programming model based on DC power flow and takes the maximum load of the network as the target function, and power balance, rated capacities of the branch lines and power restriction of the nodes as the constraint condition. In the program, the linear programming is worked out through improved simplex method and error analysis is carried out to the result. The model has the advantages of big calculation speed and small calculation error as for light load network and is suitable for power networks that require repeated optimization and adjustment. Results from a great amount of calculation with the program show that the method is of efficacy and applicability.

The invention discloses a foldable dual-beam magnetic light trap system which is mainly suitable for generating cold atoms in laser cooling. Three pairs of laser with opposite polarization and opposite travelling are formed in a vacuum chamber through reflecting incoming laser many times, and a magnetic light trap is formed under the mutual action of a magnetic field generated by an opposite Helmholtz coil. The foldable dual-beam magnetic light trap system is characterized in that multiple reflections are utilized, and laser energy is repeatedly utilized, thereby obtaining the cold atoms. Theinvention has the advantages of simple structure, easy power balance, stable atomicgroup, low input power of laser and easy adjustment, thereby providing a better cold atom resource for cold atom frequency scale, precise measurement and laser cooling physical test.

The invention discloses a power-system economic dispatching method considering power grid topology optimization. A power-system dispatching model using active power of conventional generator sets and output component states of the power grid as decision making factors is provided by incorporating the power grid topology optimization into a power-system economic dispatching model and considering the power grid topology connectivity conditions. Topological connectivity is constrained based on the minimum cutset concept in graph theory so as to judge system topological connectivity. The provided model is solved by combination of genetic algorithm and linear programming primal-dual path following interior algorithm. Conventional generator sets and power grid topology can be preset, economical efficiency of power grid operation is improved on the premise of guaranteeing safety of power grid operation, balance capacity of load power of system generation is improved, renewable energy power generation can be accepted within a larger range, abandonment of renewable energy power generation or load shedding is effectively alleviated, and technical support is provided for intelligent development for power system dispatching.

Power balancing techniques are provided for improving power efficiency of pipelined processors. A design-level implementation can be incorporated during synthesis of pipeline clocks in which a register transfer level (RTL) code, operating frequency, and available voltage domains are used to perform cycle time stealing with, and optimize for, power efficiency. A test-level implementation can be incorporated during testing of a chip in which delay and power measurements are used to perform calculations based on cycle time stealing and optimization of power efficiency. The calculations are then used to perform voltage scaling and / or adjust tunable delay buffers. Process variations may also be corrected during test time. A run-time approach can be incorporated for dynamic power balancing in which the operating system keeps track of one or more performance indicators such as a count of floating point instructions and uses a look-up table to provide the appropriate delays.

The multiple carrier load balancing method is suitable for multiple carrier CDMA movable communication system. It includes judging whether the carriers will overload after the new call is added based on the present power of the carriers and the numbers of Walsh code channel resource; calculating the difference between the maximum power and the minimum power of the no-overload carriers and the difference between the maximum and the minimum of the Walsh channel resource; comparing with the power threshold and the Walsh channel resource threshold; and designating the new call to some carrier based on the comparison results. The present invention can ensure excellent carrier power balancing effect and reduce the carrier designating times.

The invention discloses a multi-target coordinated operation optimization method of wind and photovoltaic storage electricity generation units and relates to the technical field of wind and solar storage electricity generation control. The method comprises the steps of determining output power models of the electricity generation units, wherein the output power models comprise the output power models of wind driven generators, the output power models of photovoltaic generators and the output power models of energy storage batteries; building multi-objective functions of the wind and photovoltaic storage electricity generation units, wherein the multi-objective functions comprise the electricity-generation-unit total-cost minimum objective functions and the renewable-energy-source loss-ratio minimum objective functions; setting constraint conditions of the multi-objective functions, wherein the constraint conditions comprise the power balance constraint conditions, the generator output constraint conditions and the energy-storage-battery capacity constraint conditions; solving the multi-objective functions through an improved multi-target universal gravitation search algorithm to obtain an active output value of each period of each electricity generation unit. On the basis that renewable energy sources are fully used, the longest service life of each storage battery is achieved, and therefore overall operating efficiency of the wind and photovoltaic storage electricity generation units is improved.

The invention discloses a method for carrying out model prediction control on a grid-side converter of a photovoltaic power generation system under unbalanced voltage. According to the technical scheme, the method is characterized by including the first step of carrying out analytic calculation to obtain reference current of the AC side of the converter according to voltage of a sampling grid, delayed signals and given initial power, the second step of obtaining prediction current through a prediction model under the action of voltage vectors, the third step of selecting the voltage vector, which minimizes the absolute value of the difference between the current reference value and the current prediction value, as the optimal voltage vector through a value function, and the fourth step of selecting a switch position signal corresponding to the optimal voltage vector as a switching signal for controlling a power device. Under the condition of network voltage unbalance, it is guaranteed that DC bus voltage is stable and grid-side current is sinusoidal through the control of balance of the power of the two sides of the converter. The whole process is based on a two-phase static coordinate frame, and rotational coordinate conversion is avoided. Moreover, the control method does not include the positive and negative sequence decomposition and phase locking steps, the control structure is simple, and the calculated amount is small.

A method for transmitting and receiving uplink signals using an optimized rank 3 codebook is disclosed. The optimized rank 3 codebook includes 12 precoding matrix groups, which are consisted of 6 Tx antenna power balanced precoding matrix groups and 6 layer power balanced precoding matrix groups. Preferably, the optimized 4Tx rank 3 codebook has 20 precoding matrix, two precoding matrixes are selected from each the 6 Tx antenna power balanced precoding matrix groups, considering chordal distance and the number of precoding matrix. And then 8 precoding matrices are selected from the layer balanced precoding matrix groups.

The invention discloses a novel power electronic traction transformer topological structure and a control method thereof. A novel power electronic traction transformer comprises N power transformation units. Each power transformation unit comprises an H bridge converter and a middle / high frequency isolated-type DC / DC conversion unit. The N H bridge converters for an N-grade cascaded H bridge converter, and the middle / high frequency isolated-type DC / DC conversion unit comprises K DC / DC converters. Input ends of the N power transformation units are connected in series and output ends of the N power transformation units are connected in parallel. Input ends of the N-grade cascaded H bridge converter are connected in series, and output ends of the N-grade cascaded H bridge converter are disconnected. Input ends of the N DC / DC conversion units are connected with the output ends of the N-grade cascaded H bridge converter, and output ends of the N DC / DC conversion units are connected in parallel. Input ends of the K DC / DC converters are connected in series, and output ends of the K DC / DC converters are connected in series. The power balance control of the novel power electronic traction transformer comprises three parts: the direct current output voltage balance control of each H bridge converter, the output current balance control of each middle / high frequency isolated-type DC / DC conversion unit, and the input voltage balance control of each DC / DC converter of each middle / high frequency isolated-type DC / DC conversion unit.

The invention discloses a VSG(Virtual Synchronous Generator)-based control structure for active supporting of the grid frequency and voltage of a PMSG (Direct Drive Permanent Magnet Synchronous Generator). The control structure is composed of a wind turbine generator and a back-to-back four-quadrant converter. The back-to-back four-quadrant converter consists of a machine-side converter and a grid-side converter; the machine-side converter is used for maintaining the voltage of a direct-current side capacitor; and the grid-side converter is used for controlling normal operation of the rotatingspeed of a draught fan and power balancing based on an MPPT algorithm and carrying out active supporting on the grid frequency and voltage based on a control strategy of the VSG, wherein dynamic support is realized by releasing the energy of the direct-current side capacitor and the kinetic energy of the rotor during supporting. According to the control structure, a defect that grid connection can not be realized until the PPL phase locking is used by the wind turbine generator is overcome. The wind turbine generator is equivalent to a voltage source type VSG to support fluctuation of the grid voltage and frequency.

The present application relates to a wireless communication system and related methods and apparatuses for transmitting a signal from a source apparatus to a destination apparatus, via at least one intermediate apparatus. In particular, the present invention relates to techniques which seek to improve the throughput of data in multi-hop communication systems.

Embodiments of the present disclosure provide a hybrid vehicle predictive power control system. The system is mainly aimed at long-distance freight heavy truck application scenarios; Based on the vehicle configuration parameters and the current operating conditions, with the aid of electronic navigation 3D map of vehicle expressway, the system can accurately and real-timely predict the dynamic road load power time-space function within the range of tens of kilometers of the electronic horizon in front of the vehicle, the electric power shunt is commanded by the vehicle controller, the direction and amplitude of the flow of the 100 kilowatt-level electric power are accurately and continuously adjusted among engine-driven generator set capable of being driven in tens of millisecond system response time, the battery pack and the drive motor;, keeping the engine working stably in its high efficiency area for a long time, the transient power balance of road load required by vehicle dynamicsequation can be satisfied in real time by fast charging and discharging of battery pack of several hundred kilowatts, Compared with traditional diesel heavy trucks, hybrid heavy trucks can greatly reduce the overall fuel consumption and emissions in real world operation under the premise of ensuring vehicle power, freight timeliness and driving safety.