60 results about "Total system power" patented technology

The present disclosure provides apparatus and methods for dynamic analog tuning for power reduction. As disclosed herein, the analog controls on a high-speed serial communication channel are dynamically adjusted in a manner so as to either reduce the total system power or move power dissipation between the transmitter and receiver devices, with little or no negative effect to the bit error rate. One embodiment relates to a method for tuning a communication link. The method includes occasionally determining whether the bit error rate for the communication link is acceptably low. Control parameters for analog circuitry of the communication link are adjusted to decrease power used if the bit error rate is acceptably low and are adjusted to increase power used if the bit error rate is not acceptably low. Other embodiments, aspects and features are also disclosed.

The invention provides a power distribution method for maximizing safety energy efficiency in a non-orthogonal multiple access system.A NOMA system with a function of eavesdropper wiretapping useful information is provided, meanwhile, physical layer safety and 5G green communication requirements are considered; safety energy efficiency SEE is defined as the ratio of the safety and the rate of theNOMA system to the total consumed power, then the power distribution factor of each legal user and the total power distribution factor of the system are designed in an optimized mode, an optimal powerdistribution scheme is sought, and SEE maximization of the system is achieved.

The invention belongs to the technical field of charging control of electric vehicles, and particularly relates to a charging method of an electric vehicle in a residential area, based on low-voltage power line carrier communications. According to the method disclosed by the invention, the going-out law and the travelling law of private electric vehicles are fully utilized, power measurement modules and carrier communication modules are mounted at positions where a 0.4kV outgoing line master switch of a distribution transformer in the residential area is mounted, one carrier communication module is mounted on each charging pile, and the total power of a system is received in a real-time manner; the time that the electric vehicle begins to be charged is determined by the charging pile according to the charging requirements of the electric vehicle and the total power of the current system. According to the charging method disclosed by the invention, under the premise that the requirement of a user for using the vehicle is met, the charge requirement of the user is transferred to a valley time period, and the charging requirements of more electric vehicles can be met to the maximum extent. The electricity consumption load peak caused by disordered charging and excessive and intensive charging at the valley time period is avoided, a complex charging management master station system does not need to be constructed, the charging method is independent of an intelligent optimization algorithm, the expansion fees of the distribution network can be greatly reduced, and the charging fees of the electric vehicles can be minimized.

A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.

The invention relates to an interaction simulation and optimization method for power distribution and utilization in an industrial park comprising multiple participants. Each participant takes the minimum operating cost as an objective, and an expected exchange power is obtained through decision making; an operational platform collects the expected exchange power of each participant; by taking minimum system power loss as an objective, adjusted expected exchange power is obtained through decision making and broadcasted to each participant; interaction and optimization of the expected exchange power is carried out circularly in sequence until stopping criterion is satisfied; namely, in the interaction and optimization process, only the expected exchange power of each participant needs to be interacted; when the stopping criterion is satisfied, whether the power loss is converged to an optimal value or not is detected; and when the power loss is converged to the optimal value, the operating cost of each participant and the total system power loss achieve the optimized state, so that the minimum total operating cost is realized.

An equality constraint processing method for dynamic economical scheduling of a wind-driven, water-driven and thermal-power-driven electric power system comprises the following steps of 1, establishing an equality constraint in a dynamic economical scheduling model of the wind-driven, water-driven and thermal-power-driven electric power system, screening out candidate solutions which are generated by an optimizing algorithm in current iteration and do not satisfy the equality constraint, calculating an equality constraint violation amount of the candidate solutions, and determining a total power adjusting amount of the system; 2, setting a system total power upward-adjusting and downward-adjusting principle which comprises an output adjusting sequence of each power generator set and a system total power adjusting amount distributing principle; and 3, distributing the system total power adjusting amount according to the system total power upward-adjusting and downward-adjusting principle which is set in the step 2, and obtaining an output value of each power generator set, wherein the output value of each power generator set satisfies the equality constraint. The equality constraint processing method settles a problem of solving efficiency and convergence reduction caused by incapability of satisfying the equality constraint in solving a dynamic economical scheduling problem in solving a dynamic economic scheduling problem of the power system in prior art.

The invention provides a resource allocation method for a relay node adopting decode-and-forward transmission mode in a collaborative orthogonal frequency division multiplexing system. A first technical scheme is applied to total system power restraint conditions, and specifically comprises the following steps of: 1, sub-carrier matching and relay node selection; 2, the power allocation of sub-carrier pairs; and 3, the power allocation between the sub-carriers in each sub-carrier pair. By the first technical scheme, the execution of the power allocation is simplified. A second technical scheme is applied to node power independently-restrained conditions, and specifically comprises the following steps of: 1, the sub-carrier matching; 2, initial power allocation; 3, the power regulation of each sub-carrier of the relay node; and 4, the recovery of surplus power of a source node. By the second technical scheme, the total power consumption of a system is minimized on the basis of ensuring the maximum of system capacity so as to fulfill the aim of prolonging the time to live of the node.

A cooling system for cooling a temperature-dependent power device includes an active cooling device and a controller to generate and transmit a drive signal thereto to selectively activate the device. The controller receives an input from sensors regarding the cooling device power consumption and measured operational parameters of the power equipment—including the power device output power if the device is a power producing device or the power device input power if the device is a power consuming device. The controller generates and transmits a drive signal to the cooling device based on the cooling device power consumption and the measured power device input or output power in order to cause the active cooling device to selectively cool the heat producing power device. A net system power output or total system power input can be maximized / minimized by controlling an amount of convection cooling provided by the cooling device.

A data security shunt transmission method based on linear search comprises the following steps of: (1) from the view of intelligent equipment SD in a wireless network, transmitting a part of data to abase station BS, and shunting the other part to a low power wireless access node AP, wherein there is also a situation that the data is eavesdropped by a hidden eavesdropper, and the optimization problem that minimizes the total system power consumption is described as a non-convex optimization problem in the case of ensuring data transmission requirements and safety overflow limit; (2) vertically resolving the TPM problem to a two-level optimization problem; (3) proposing a monotonically optimized power control method according to the underlying problem to optimize the transmission power ofSD; (4) proposing a linear search method for the top problem to further save energy and optimize the total consumed power of the system; and (5) finally solving the TPM problem through interactive iteration between the underlying problem and the top problem. The invention has relatively high security and reliability.