1074 results about "Electricity system" patented technology

Embodiments of a power provision system of the present invention generally include a transformer, a drive assembly, a motor control center, rectifiers, circuit breakers, and a cooling system, all of which are enclosed in a cabinet that is divided into a plurality of compartments that house various components and that is adapted and configured to be skid mounted on a trailer. In one embodiment, high voltage power is supplied to the power provision system, wherein it is stepped down to lower voltages by the transformer and the lower voltage power is utilized to drive a fracking pump motor via the drive assembly, as well as auxiliary equipment, such as the cooling system, via the motor control center. Embodiments of a method of using the power provision system are also provided.

A guidance and vehicle control system for automatically steering a vehicle, such as an agricultural vehicle or a tractor, through a field. The system includes a GNSS receiver and antenna for determining the vehicle's instantaneous position, a guidance CPU, and an automatic steering subsystem integrated with the vehicle's electrical power system. The automatic steering subsystem can be interfaced with the steering column of the vehicle, and mechanically activates the steering column, thereby steering the vehicle according to instructions received from the CPU based upon the vehicle's position and a predetermined path. An interrupt element, such as a wheel movement sensor or a slip gear, may be interfaced with the automatic steering subsystem to allow for manual steering override of the automatic steering control.

Enclosed is an active and reactive coordination control method for permanent-magnet direct-driven wind turbines in the low-voltage ride-through process. Two different control strategies are employed for a grid side converter according to amplitude change of power grid voltage: when the power grid voltage is in a normal state, the grid side converter is in an active-priority maximum power tracing control mode so that the wind turbines capture wind energy to the maximum extent; when the power grid voltage is beyond the normal range, the grid side converter is in an active priority control mode so that the dynamic reactive current which is injected into an electricity system meets the requirements of grid combining. An engine side converter is in a direct-current voltage control mode based on rotor energy storage, power unbalance of the direct-current side of the engine side converter is relieved and the direct-current voltage is stabilized by utilizing the self rotating speed of the permanent-magnet direct-driven wind turbines and the change of the kinetic energy. The active and reactive coordination control for the wind turbines before or after the sudden change of the power grid voltage is realized according to the amplitude change of the power grid voltage, the fluctuation of the direct-current bus voltage is restrained by releasing or storing the rotor kinetic energy, so that the low-voltage ride-through capability of the permanent-magnet direct-driven wind turbines is improved, reactive power support is rapidly and accurately provided for the power grid, and certain support is given to restoration of the power grid voltage.

A waste heat recovery system, method and device executes a thermodynamic cycle using a working fluid in a working fluid circuit which has a high pressure side and a low pressure side. Components of the system in the working fluid circuit include a waste heat exchanger in thermal communication with a waste heat source also connected to the working fluid circuit, whereby thermal energy is transferred from the waste heat source to the working fluid in the working fluid circuit, an expander located between the high pressure side and the low pressure side of the working fluid circuit, the expander operative to convert a pressure / enthalpy drop in the working fluid to mechanical energy, a recuperator in the working fluid circuit operative to transfer thermal energy between the high pressure side and the low pressure side of the working fluid circuit, a cooler in thermal communication with the low pressure side of the working fluid circuit operative to control temperature of the working fluid in the low side of the working fluid circuit, a pump in the working fluid circuit and connected to the low pressure side and to the high pressure side of the working fluid circuit and operative to move the working fluid through the working fluid circuit, and a mass management system connected to the working fluid circuit, the mass management system, method and device having a working fluid vessel connected to the low pressure side of the working fluid circuit and configured to passively control an amount of working fluid mass in the working fluid circuit.

A system for supplying electrical power for use when the vehicle engine is shut down and configurations of long-haul trucks employing the system are disclosed. The power system is a battery bank contained within an insulated enclosure. The batteries are heated when the truck is in operation with the insulated enclosure maintaining battery temperature sufficient to provide high battery power capacity for an extended period after the vehicle is shut down. A large capacitor, rather than the batteries, provides current for starting the vehicle engine. A dc-to-dc converter controls the fully charged capacitor voltage and provides capacitor charging current even when the batteries have been discharged to a low-voltage condition. The disclosed long-haul truck configurations include a storage cooler that employs a phase-change medium that is thermally charged to a low temperature while the truck is in operation and is used to provide sleeper unit cooling air. Additional provision is made for heating the sleeper unit and for powering a coolant heater that can warm the truck engine block and truck fuel when the engine is shut down during cold weather.

The invention discloses a short-term wind power prediction method based on integrated empirical mode decomposition and a deep belief network. The short-term wind power prediction method comprises the steps of: decomposing an original wind power sequence into a series of intrinsic mode functions with different features by adopting integrated empirical mode decomposition, calculating sample entropy of the original wind power sequence and the intrinsic mode functions, combining the intrinsic mode functions with similar sample entropy values into a new sequence, and forming a random component, a detail component and a trend component; selecting an input variable set by adopting a partial autocorrelation function; constructing a training sample set according to the input variable set of each component; and establishing a deep belief network short-term wind power prediction model for each component, and superposing prediction results of the components, so as to obtain a final short-term wind power predicted value. The short-term wind power prediction method provided by the invention effectively improves the short-term wind power prediction precision, and can effectively solve the wind power prediction problem of the electric power system, so as to provide more reliable guarantee for large-scale wind power integration.

The present invention discloses a large perturbation real-time simulation system that is based on non-linear robust electricity system stabilizer and pertains to the experimental technique of stability of electric power system. The present invention is characterized in that: the stimulation system consists of a power amplifier, a non-linear robust electricity system stabilizer NR-PSS and an electricity system real-time stimulator RTDS that are connected in series. The composite signals of the excitation control and controllable silicon sent to the RTDS generator is generated by NR-PSS. These contains the control signals of AVR and assistant excitation control signal that takes the influence of large perturbation signals into consideration, thus, the problems of large difference in field experiment when using dynamic stimulation large perturbation experiment and dynamic stimulation experiment due to generator terminal parameters. The present invention can reflect the performances of the NP-PSS in century operation system in large perturbation.

Inductively coupled plasma (ICP) reforming converts carbonaceous compounds into a fuel for use in generating electrical power. Energy rich hydrocarbon fuels, such as coal, marine diesel, oils, and hydrocarbon wastes are employed as a feedstock for the ICP, which transforms the feedstock into a fuel that can be used by fuel cells and gas turbines for the production of electricity. The overall efficiency of an ICP-based electrical power system can be increased by providing partial oxidation within the reaction vessel. The partial oxidation conditions consume a small amount of the reformed fuel gas, thereby liberating sufficient thermal energy to reduce the electrical power requirements of the ICP to maintain desired reactor temperatures, and providing an increase in the overall net electrical power production. The integrated power production system can also adjust to meet an increased requirement for process heat and steam by balancing the effect of partial oxidation.

There is provided a battery including a positive electrode, a negative electrode, a separator at least including a porous film, and an electrolyte. The positive electrode includes a positive electrode current collector having a pair of surfaces, and a positive electrode active material layer provided on each of the surfaces of the positive electrode current collector. The positive electrode active material layer contains a positive electrode active material. The positive electrode active material layer has an area density S [mg / cm2] more than or equal to 30 mg / cm2. The porous film included in the separator has a porosity ε [%] and an air permeability t [sec / 100 cc] which satisfy a predetermined formula.

A waste heat recovery system, method and device executes a thermodynamic cycle using a working fluid in a working fluid circuit which has a high pressure side and a low pressure side. Components of the system in the working fluid circuit include a waste heat exchanger in thermal communication with a waste heat source also connected to the working fluid circuit, whereby thermal energy is transferred from the waste heat source to the working fluid in the working fluid circuit, an expander located between the high pressure side and the low pressure side of the working fluid circuit, the expander operative to convert a pressure / enthalpy drop in the working fluid to mechanical energy, a recuperator in the working fluid circuit operative to transfer thermal energy between the high pressure side and the low pressure side of the working fluid circuit, a cooler in thermal communication with the low pressure side of the working fluid circuit operative to control temperature of the working fluid in the low side of the working fluid circuit, a pump in the working fluid circuit and connected to the low pressure side and to the high pressure side of the working fluid circuit and operative to move the working fluid through the working fluid circuit, and a mass management system connected to the working fluid circuit, the mass management system, method and device having a working fluid vessel connected to the low pressure side of the working fluid circuit and configured to passively control an amount of working fluid mass in the working fluid circuit. Systems and methods for supplying a working fluid to the working fluid circuit are disclosed.

The invention discloses a method for estimating a state of health (SOH) and a state of charge (SOC) of a storage battery. The method is applied to a backup power system. The method comprises the following steps of: estimating the SOH and the SOC of the storage battery by using two branches simultaneously; comparing deviation of estimated values of the two branches; and selecting and determining the estimated values. In the method, a backup battery pack is not needed and measurement can be finished on line; quantitative measurement can be realized and the accuracy is high; and during measurement, complicated equipment is not needed, so that the cost is reduced.

The present invention relates to a tray comprising: a) a base panel having two opposite edges adapted for sliding within grooves of a structure; b) a pair of electrical contacts located on the two opposite edges of the base adapted to conduct electricity; c) a battery recharging system adapted to provide one or more electromagnetic fields capable of transferring an electrical charge to a properly equipped electrical device having a rechargeable battery or a connection for a portable electronic device adapted to connect the portable electronic device to the power system of a host and / or other electronic systems of the host; d) means for connecting the pair of electrical contacts to the battery recharging system or to the connection to the portable electronic device; e) one or more display panels providing a surface for resting one or more rechargeable portable electric devices upon, such panels adapted to allow one or more users of portable electronic device to view one or more displays of the portable electronic devices; f) panels for connecting the base panel and one or more display panels and for enclosing the tray. The tray is adapted for use in a host system which supplies power to the tray. In a preferred embodiment, the host system is or is utilized in a vehicle.

The invention discloses a unit combination method for resolving and considering wind power volatility. Compared with the existing unit combination method, the method has the benefits that by applying an interval linear programming theory, the system security can stability can be theoretically ensured within a wind power output fluctuation scope, and the economy of the system is improved on the premise of safety; and under the realistic background that wind power and other new energy resources are largely introduced, the ability of the power system to answer the wind power volatility can be effectively improved, and the system safety and the stability are improved.

The invention relates to a heat supply pipe network thermal storage efficiency-based thermal-electric joint optimal dispatching method and belongs to the multi-energy coupling electric power system operation and control technical field. The method of the invention includes the following steps that: a thermal-electric joint optimal dispatching model considering concentrated heat supply pipe network thermal storage characteristics is built, wherein the model is composed of an objective function and constraint conditions, wherein the objective function is to minimize the total cost of the operation of a thermal-electric joint system, and the constraint conditions include a power system operation constraint condition and a heat supply system operation constraint condition, wherein the heat supply system operation constraint condition contains a concentrated heat supply system model reflecting the concentrated heat supply pipe network thermal storage characteristics; and the thermal-electric joint optimal dispatching model is solved through an iterative solving algorithm, and an obtained result can be applied to thermal-electric joint optimal dispatching. According to the method, the thermal storage efficiency of a heat supply pipe network is considered in the optimal dispatching problem of a power system, and the peak regulation characteristic of the pipe network is fully utilized, and the problem of large amount of wind curtailment during a heating period in the winter in northern China can be solved.

The invention belongs to the technical field of electric power systems and particularly relates to a method for electric vehicle load prediction based on an efficiency maximization principle. First a space-time distribution model of electric vehicles is established based on a trip chain, information such as initial departure time, driving destination, driving distance and stopping time is analyzed, and charging space-time distribution of the electric vehicles is obtained. Charging stations most favorable for users are selected based on the efficiency maximization principle to charge the electric vehicles, and finally space-time distribution of electric vehicle charging loads is given. On the basis of the fact that the electric vehicle load prediction by previous scholars is only confined to the time level and the regional level, the method for electric vehicle load prediction based on the efficiency maximization principle is provided, and the load prediction can be detailed to the charging stations.

A switch comprises an insulated container (1), a liquid metal (2), resistance liquid (3), a capacitance plate (4), a pole plate insulating layer (5), an inductor (6), a first connecting point (Y plus), a second connection point (Y minus), and electric insulating oil. An electronic system is provided with the above switch. A power system is provided with the switch. An automatic system is provided with the electronic system and the power system above. A mechanical device is provided with an electrical machine and the switch above. A measuring device is provided with the mechanical device above. A labour protection air-exhausting device is provided with the electric machine, an exhaust air duct, an exhaust fan and the switch above. The switch, the electronic system, the power system, the automatic system, the mechanical device, the measuring device and the labour protection air-exhausting device of the invention are simple in structure, long in service life and low in cost.

In some embodiments, the present invention includes the use of one or more electric power supply system, or systems, and the electric vehicle, or vehicles, connected thereto, to provide load-based utility grid frequency regulation by varying the amount of power drawn by the vehicle or vehicles.

The present invention provides a charging control method, charging monitoring control center and vehicle-mounted navigation device of electric automobiles. For obtaining the balance of supply and demand of electricity in an electric system, needed electric automobiles are guided to charging stations in needed time, and the charging of the electric automobiles of the charging stations can be controlled. For distributing total charging electricity consumed by the charging stations within electricity distribution areas planned by an electricity system monitoring control system to the electric automobiles charged by the charging stations to consume, the charging monitoring control center is used for collecting the electric automobiles charged in the charging stations for driving electric automobiles, and through distributing the total charging electricity to the chosen electric automobiles from the collected electric automobiles, charging amount giving to the electric automobiles can be decided. The electric automobiles are respectively guided to the charging stations, and the charging electricity of the electric automobiles of the charging stations are respectively controlled.

A modular, solar energy system comprising one or more modular solar panels. The solar panels include a plurality of photovoltaic cells that are exposed to the radiant energy from the sun to create electrical power and are in heat transfer relationship with a water manifold through which water flows to remove heat from the PV cell as well as heat from the radiant energy. The heated water for the water manifold is used for heat / hot water and electricity system that can be configured using provided software and that can provide for any or all of the offerings (heat / hot water / electricity). The water manifold is constructed of a special high conductivity composite material that can be selected in accordance with the heat conductivity and customized for a particular installation. The system eliminates the use of copper and / or aluminum tubing, thereby reducing the cost and complexity of the system.

A storage assembly for use in a passenger compartment of a vehicle provides power to an electronic device from a vehicle power system. The storage assembly includes a storage bin having an exterior surface, an opening, and a storage space accessible through the opening. The storage assembly also includes a door having an outer surface which is pivotally coupled to the storage bin. A retractable cord is attached to a detachable member which is releasably attached to the storage bin. The retractable cord includes a first end having a first connector which is configured to connect the vehicle power system and a second end having a second connector configured to connect to the electronic device. A notch is formed in the housing adjacent the opening. The notch allows the second connector to extend beyond the exterior surface of the housing when a door is in the closed position.

The present invention discloses an intelligent energy-saving electricity system of light navigation in a large-scale underground garage of a residence community, and a method thereof. The system comprises an access management subsystem, a license plate recognition subsystem and a light navigation subsystem. The license plate recognition subsystem is used for real-time monitoring and recording of information of a vehicle entering or going out of the garage, and is used for positioning and recognition of the license plate; if the vehicle enters the garage, in the license plate recognition subsystem, it is determined whether the information of the vehicle is pre-stored information in a database after recognition, if the information of the vehicle is stored in a database, a command permitting access is sent to the access management subsystem, and then a navigation command is sent to the light navigation subsystem; and if the vehicle goes out of the garage, it is determined whether the information of the vehicle is pre-stored information in the database after recognition so as to determine whether permitting to go through or not. The light navigation subsystem is used for light navigation to vehicles which enter or go out of the garage, and only floodlights within the setting distance of a vehicle are turned on, regardless of whether a vehicle drives along the planned routes in the access management subsystem, thereby power supply is saved.

The invention discloses a multi-target dynamic scheduling method for a wind storage hydrothermal power system based on multi-source complementation, and the method comprises the following steps: 1, building a multi-target dynamic economical scheduling model: 1.1, building four optimization targets: take the minimum thermal power coal consumption, the minimum thermal power output adjustment volume, the maximum thermal power generation and the minimum load fluctuation after the thermal power is inputted to a power grid; 1.2, determining the constraint conditions of the four optimization targets; 2, carrying out the weighting and conversion of the four optimization targets, and obtaining a target function F of the multi-target dynamic economical scheduling model; 3, combining with the target function F, and solving the multi-target dynamic economical scheduling model through employing the improved plant growth simulation algorithm. According to the invention, the method gives full consideration to the economical performance and stability of thermal power operation, the utilization rate of the wind power and hydropower and the adjustment effect of a pumped storage power station, and guarantees the economical performance and stability of operation of the thermal power generating unit while promoting the consumption of the wind power.

The invention provides an electric vehicle charging guidance method considering road-network-vehicle, which considers the charging demand difference of different types of electric vehicles, performs optimized guidance scheduling on the electric vehicles in slow charging and fast charging modes from two aspects of day-ahead and real-time. The method comprises the following steps: establishing an electrical traffic cooperative control architecture; formulating a charging station selection and navigation strategy; formulating a time-sharing and zoning electricity price to guide quick charging; and establishing a double-layer optimization scheduling model to guide slow charging. According to the method, on the premise that the safety and economy of a power distribution system are guaranteed, the satisfaction degree of power consumers is considered, and different charging requirements, time and space and other factors are considered to research the guide strategy and operation mode of the electric vehicle. Analysis of the charging station and system load conditions before and after optimization shows that the method enables the system load to be gentler than that in a free charging mode, plays a role in peak clipping and valley filling to a certain extent, and improves the operation safety and economy of a power system.

An automobile relay with a safety appliance comprises a relay body and a safety appliance, wherein the relay body comprises a weak electricity system, a strong electricity system, a base and an enclosure, the weak electricity system comprises an iron core, a coil, a yoke iron, an armature iron and an armature iron pressure spring, the safety appliance comprises two safety fuse sockets and a safety fuse inserted between the two safety fuse sockets, the upper portion of one safety fuse socket is a socket connector, the lower portion is a fixing part, the fixing part is fixed on the armature iron, the upper portion of the other safety fuse socket is a socket connector, an insulating partition sheet is arranged between the socket connector and the armature iron, the lower portion of the other safety fuse socket is equipped with a power source pin and a fixing pin, the power source pin penetrates through the base and is limited on the base, the fixing pin is inserted on the base, a safety fuse inserting hole is arranged on the top portion of the enclosure corresponding to the two safety fuse sockets, and the safety fuse is inserted in the inserting hole. The utility model has the advantages of reducing contact resistance, reducing location space, strong general characteristic, high production efficiency, and saving cost.

The invention discloses a wind power eliminating method considering the interruptible load and the day-ahead hour electricity price. A day-ahead hour electricity price optimization and an interruptible load under a wind power uncertainty condition are established to participate in a standby power system dispatching two-layer planning model containing wind power, and the outer layer is a day-aheadhour electricity price optimization model, and the inner layer is a daily electric power system dispatching model. A random scheduling method is adopted, and the optimal day-ahead hour electricity price, the wind electricity eliminating and electricity system economic dispatching in a plurality of scenes can be realized. According to the invention, the non-flexibility of the single electricity price and the peak-valley time-sharing electricity price is overcome, and the system abandoning amount is reduced. The power generation efficiency of the power grid is improved, the peak shaving capacityof the power grid is improved, the power generation cost of the thermal power generation is reduced, and the benefit of the user is increased.

The invention relates to a power scheduling operation method, in particular to a wind-fire-water co-scheduling method on the basis of a multi-agent system. The method solves the problem that a conventional power scheduling operation method cannot meet the requirement on the large-scale wind power grid-connected operation. The wind-fire-water co-scheduling method on the basis of the multi-agent system is implemented by adopting the following steps of: 1, constructing a wind-fire-water co-scheduling model on the basis of the multi-agent in a scheduling Agent; 2, acquiring predicted data of a load demand in a power system by a load Agent in the power system; 3, sending acquired basic data and real-time data into the wind-fire-water co-scheduling model on the basis of the multi-agent by each thermal power Agent; and 4, issuing and executing a scheduling command by each thermal power Agent and a hydroelectric Agent. The wind-fire-water co-scheduling method is suitable for large-scale wind power grid-connected operation scheduling.

An apparatus and method for operating a fuel cell power system utilizing a low voltage power source and system power to power an airmover. The fuel cell power system uses a low voltage power source to power the airmover during start-up and transitions to using system power to power the airmover as the fuel cell stack increases its voltage output. During a shutdown operation the fuel cell power system transitions from using system power to using the low voltage power source to power the airmover enabling a purging operation to be performed. A controller coordinates the operation of the airmover between using the low voltage power source and using electrical power produced by the fuel cell stack to power the airmover.