190 results about "Load shifting" patented technology

A system for shifting energy demand from on-peak time windows to off-peak time windows by using hot water heater load shifting, while providing the end user with the level of service (i.e., availability of hot water) according to the user's customary use described by service quality criteria. The shift is accomplished by a controller located at the end user establishment and in communication with a central control server. The controller monitors local water heater upper and / or lower temperature and controls upper and / or lower water heater heating elements in accordance with a demand shift process commanded by the central control server. The controller may determine usage and remaining capacity for reporting back to the central control server. A volumetric capacity and usage determination is disclosed. The control server may select water heaters according to use patterns and / or measured capacity. One embodiment is adapted for use with existing water heaters without disrupting safety features of the existing water heater.

Power generation systems and methods are provided with features directed to various innovations including ones relating to the conversion of concentrated solar and biomass energy to electricity, load-shifting of electrical power supply systems, gas turbine devices and cycles, and power plant control systems.

Methods and systems are provided for realizing energy cost savings through load shifting utilizing a battery bank that may serve as a battery back-up on a premises for providing power in the event of a grid power outage or curtailment. A budget of unreserved cycles of battery charging and discharging is determined, taking into account the rated battery life in terms of both time (e.g., years) and number of cycles. That cycle budget is allocated to days of the year identified as days on which the greatest savings can be realized through load shifting. These days are identified by taking into account the peak and off-peak usage rates applicable on those days, any rate tiers that may be entered as a result of the additional energy expended to load shift, and the round trip efficiency of the charge / discharge cycles. Load shifting is executed in accordance with an established schedule of the identified days, by discharging the batteries during peak usage hours and charging the batteries during off-peak periods. In the event the budget of unreserved cycles exceeds the number of profitable days for load shifting, the depth of discharge on each cycle may be increased to realize greater savings on the scheduled days, at the tolerable cost of losing cycles not expected to be used in any event.

A toothed gear transmission is described, in which an input shaft is connected to a differential by a first and a second partial transmission, which are disposed parallel to each other in the power flow and which both have a frictionally engaged load shifting clutch and an intermediate shaft. The elements are disposed concentrically to each other and coaxially to the input shaft, and each intermediate shaft can be effectively connected to the input shaft through the load shifting clutch. At least one toothed gear for each intermediate shaft is provided, of which at least one can be effectively connected to a first driven shaft disposed parallel to the intermediate shafts, which directly or indirectly outputs to the differential gear.

An exoskeleton, configurable to be coupled to a person, includes an exoskeleton trunk connected to first and second leg supports at respective hip joints, which allow for flexion and extension about respective hip axes. A counterweight device including an auxiliary mass is connected to the exoskeleton trunk through an actuator such that the auxiliary mass extends in a position behind the exoskeleton trunk. A front load is supported by the exoskeleton through a load bearing device including a load shifting device for selectively operating powered reel mechanisms to raise or lower the front load with respect to the exoskeleton trunk. The auxiliary mass can be selectively shifted with respect to the exoskeleton trunk to balance the moment created about the hip axes by the auxiliary mass and the moment created by a downward force of the load on the load bearing device.

A system for shifting energy demand from on-peak time windows to off-peak time windows by using hot water heater load shifting, while providing the end user with the level of service (i.e., availability of hot water) according to the user's customary use described by service quality criteria. The shift is accomplished by a controller located at the end user establishment and in communication with a central control server. The controller monitors local water heater upper and / or lower temperature and controls upper and / or lower water heater heating elements in accordance with a demand shift process commanded by the central control server. The controller may determine usage and remaining capacity for reporting back to the central control server. A volumetric capacity and usage determination is disclosed. The control server may select water heaters according to use patterns and / or measured capacity. One embodiment is adapted for use with existing water heaters without disrupting safety features of the existing water heater.

The invention is based on a toothed gear transmission in which an input shaft is connected to an output shaft by a first and a second partial transmission, which are disposed parallel to each other in the power flow and which both have a frictionally engaged load shifting clutch and an intermediate shaft, in which each of the intermediate shafts can be effectively connected to the input shaft through the load shifting clutch, and with at least one first transmission constant. It is proposed that for starting, the first load shifting clutch can be placed in effective connection with the output shaft through a transmission constant and the second load shifting clutch can be placed in effective connection with the output shaft through a transmission constant, each at a gear ratio of the lowest gear speed.

The invention discloses a user selection switching method based on a moving load balancing mechanism, mainly solving the problems of interrupted communication or Ping-Pong switching caused by rapidly descensive signal quality easily appearing in the prior method under the circumstance that a user moves at high speed. The user selection switching method has the specific process that a source base station detects the load condition of a cell and decides whether the load balancing mechanism is started or not; the source base station and an adjacent base station exchange load information by an X2 interface and determine an objective cell to which the load is transferred according to the obtained load information of the cell and an adjacent cell; the source base station and an objective base station consult to update respective switching parameter; the source base station makes the reselection on users satisfying switching toggle conditions after the switching parameters are altered so as to determine non real-time service users moving in the manner of deviating from the direction of the base station as final users to be switched; and the users to be switched are switched to the objective cell so as to realize the intra-cell load balancing. The invention greatly increases the probability of normal conversation after the switching is finished, ensures the continuity of user service and improves the user service quality and the system performance and is used for the moving load balancing mechanism of the next-generation mobile communication system.

A brick laying system where an operator such as a mason works proximate a moveable platform having a robotic arm assembly, a mortar applicator with a mortar transfer device, and a brick transfer device to build structures. The robotically assisted brick laying system may also contain a stabilizer having a disturbance sensing and a disturbance correcting component that provides compensation for disturbances caused by load shifting, movement of the platform, wind, operator movement, and the like. In addition, the robotically assisted brick laying system has a sensing and positioning component for controlling placement of the moveable platform and robotic arm assembly. The interoperability of the system with a mason or skilled operator removes much of the manual labor component of brick laying, allowing the mason more time to focus on craftsmanship and quality, thus improving the end product and the overall working conditions of the mason.

A soft-load power distribution system includes a transfer switch having a first input to a utility power source with a utility alternating current (AC) voltage, a second input to a generator power source with a generator AC voltage, and an output to a load. A first switch is electrically connected between the first input and the output and a second switch is electrically connected between the second input and the output. The transfer switch has a third input, such as a go to emergency input, controlling the first and second switches. A bypass switch is electrically connected between the second input and the output. First and second sensors, such as potential transformers, sense the utility and generator AC voltages, respectively. A controller closes the bypass switch when the utility AC voltage is within a predetermined range of the generator AC voltage, and includes an output controlling the third input.

Methods and systems are provided for realizing energy cost savings through load shifting utilizing a battery bank that may serve as a battery back-up on a premises for providing power in the event of a grid power outage or curtailment. A budget of unreserved cycles of battery charging and discharging is determined, taking into account the rated battery life in terms of both time (e.g., years) and number of cycles. That cycle budget is allocated to days of the year identified as days on which the greatest savings can be realized through load shifting. These days are identified by taking into account the peak and off-peak usage rates applicable on those days, any rate tiers that may be entered as a result of the additional energy expended to load shift, and the round trip efficiency of the charge / discharge cycles. Load shifting is executed in accordance with an established schedule of the identified days, by discharging the batteries during peak usage hours and charging the batteries during off-peak periods. In the event the budget of unreserved cycles exceeds the number of profitable days for load shifting, the depth of discharge on each cycle may be increased to realize greater savings on the scheduled days, at the tolerable cost of losing cycles not expected to be used in any event.

A system and method for shifting power load on a power distribution network with multiple power loads, each of which draws power from the power distribution network. The system includes a controller communicatively coupled to an energy storage system and power load on the power distribution network. The controller is configured to receive a load-shifting signal, determine a load-shifting procedure, and switch one or more of the communicatively coupled power loads from drawing power from the power distribution network to drawing power from the energy storage system according to a load-shifting algorithm.

The invention discloses a method for optimizing demand-side time-of-use power price based on photovoltaic grid-connected uncertainty. The method comprises the following steps: obtaining the daily load data after distributed energy is connected, and determining load peak-valley periods according to a fuzzy membership function; determining the objective function and the constraint condition of the optimization method of the demand-side peak-valley time-of-use power price in an operation cycle, and creating a peak-valley time-of-use power price optimizing model; by using a chance constraint theory, converting power balance constraint into deterministic equality constraint; and obtaining optimal peak-valley time-of-use power price by using a particle swarm optimization algorithm. The method provided by the present invention, based on peak shaving and load shifting adjustment of a power distribution network demand side according to the peak-valley time-of-use price optimization model, takes account of the connection of distributed power. At the same time, the optimization method adopts the chance constraint theory to solve the problem of prediction uncertainty of distributed power grid-connected power, reduces the decision risk caused by uncertainty and improves the pricing rationality of peak-valley time-of-use price.

A distributed and collaborative load balancing method is disclosed that uses a utility's existing transmission and distribution system to charge an Electric Vehicle (EV) using load shifting over time and minimizes the overall cost of energy usage to charge EVs. The collaborative load balancing ensures grid reliability.

Methods and systems provided for creating a scalable building block for a virtual power plant, where individual buildings can incorporate on-site renewable energy assets and energy storage and optimize the acquisition, storage and consumption of energy in accordance with a value hierarchy. Each building block can be aggregated into a virtual power plant, in which centralized control of load shifting in selected buildings, based on predictive factors or price signals, can provide bulk power for ancillary services or peak demand situations. Aggregation can occur at multiple levels, including developments consisting of both individual and common renewable energy and storage assets. The methods used to optimize the system can also be applied to “right size” the amount of renewable energy and storage capacity at each site to maximize return on the capital investment.

An automated multi-group standard transmission, for a utility vehicle, and a process for changing gears in the multi-group transmission. The multi-group transmission includes at least two multi-speed transmission groups arranged one after the other, such that a multitude of gears can be shifted. A transmission input shaft that can be connected to an engine, via a startup element, is associated with a first transmission group and a second transmission main shaft is associated with a second transmission group. Load shifting mechanisms produce a temporary direct connection between the transmission input shaft and the transmission main shaft such that an intermediate gear can be shifted during a gear change from an original gear into a target gear. The load shifting mechanism enables gear changes that are virtually free of interruptions in load transfer during a gear change from a lower to a higher gear, thus increasing a high operational comfort.

A simple, adjustable lift system to load a cot bearing a patient into and out of an ambulance and a method of transferring a load on a transport into a vehicle is provided. More specifically, the lift system provides a pair of rails that may be adjusted to accommodate any cot currently in use by an ambulance. The rail system is extendable and is operated by a linear actuator to couple to a cot or other transport and lift the cot or other transport to a height from which the cot may be laterally inserted into the ambulance without undue strain on the EMT, firefighter, or other user.

The invention discloses a regional load balancing method in a cellular mobile communication system, mainly solving the limitation problem that only single cell pair is considered in load balancing behaviour in an advanced international mobile telecommunication system (IMT-Advanced system). The method is mainly characterized in that 1, a load balancing scene is expanded to a region formed by multiple cells from a single cell pair; 2, through constructing a utility function, each cell in the load balancing region carries out load balancing by taking utility value maximization as a target; and 3, CIO (cell individual offset) of the cell relative to a specific adjacent cell is changed to realize switching and load transferring of a user. The regional load balancing method disclosed by the invention accords with the distributed characteristic of self-organized network architecture of the IMT-Advanced system; since a multi-cell linkage policy is adopted, system average blocking rate is effectively reduced, service quality of the users in the system and load balancing convergence rate are improved, and oscillation problem of regional load balancing is avoided.

A vehicle comprising a frame assembly supported for movement by a centrally located driving track assembly and a pair of flanking driving and steering wheels. An engine is assembly carried by the frame assembly which is constructed and arranged to generate and supply power for the vehicle. The driving track assembly includes a track frame structure forming a part of the frame assembly, a series of rollers carried by the track frame structure including a driver roller and an endless track trained about the rollers so as to provide an operative ground engaging flight extending in a straight vehicle driving direction. A power operated track moving structure is operatively connected to the driver roller using power supplied from said engine assembly to move said track in driving relation to the ground. A wheel mounting assembly is provided for each wheel including wheel mounting structure constructed and arranged to mount an associated wheel for rotational movement about a generally transversely horizontally extending rotational axis and a parallel linkage mechanism operatively connected with the frame assembly extending laterally outwardly in connected relation to the wheel mounting structure constructed and arranged to enable the wheel mounting structure to be vertically moved in such a way as to effect a vertical translational movement of the rotational axis. A power operated wheel driving structure is operatively connected with each wheel and uses power supplied by the engine assembly to rotate an associated wheel about the rotational axis thereof. A power operated retractable and extendible unit is operatively connected between the track frame structure and each wheel which is constructed and arranged to effect a relative vertical movement of an associated wheel with respect to the track frame structure between retracted and extended positions.

A system for shifting energy demand from on-peak time windows to off-peak time windows by using hot water heater load shifting, while providing the end user with the level of service (i.e., availability of hot water) according to the user's customary use described by service quality criteria. The shift is accomplished by a controller located at the end user establishment and in communication with a central control server. The controller monitors local water heater upper and / or lower temperature and controls upper and / or lower water heater heating elements in accordance with a demand shift process commanded by the central control server. The controller may determine usage and remaining capacity for reporting back to the central control server. A volumetric capacity and usage determination is disclosed. The control server may select water heaters according to use patterns and / or measured capacity. Further embodiments may regulate load dependent properties of the power including voltage, phase and / or frequency.

The invention discloses a distribution network three-phase load unbalance adjusting control system which comprises a monitoring subsystem, an intelligent power distribution terminal and an intelligent phase-change switch. The monitoring subsystem and the intelligent power distribution terminal conduct data transmission through a wireless communication network, and the intelligent power distribution terminal and the intelligent phase-change switch conduct data transmission through the wireless communication network. By means of the distribution network three-phase load unbalance adjusting control system, the current and voltage information of a power distribution transformer in a distribution unit-area, three-phase four-wire branch lines and single-phase load can be acquired in real time, the unbalancedness of the distribution network three-phase current is obtained through calculation, on-line phase modulation is conducted according to the unbalanced load, and partial load of a phase of a large current is transferred to a phase of a small current, so that the purpose that the distribution network three-phase load unbalance is adjusted is achieved, the line loss is effectively lowered, and power supply quality is improved.

The invention relates to a multi-energy complementation microgrid scheduling method based on multi-time scales. According to the technical points, the method comprises the following steps of: 1, setting a microgrid system scene, and respectively modeling a combined cooling heating and power device, an ice-storage air conditioner and a storage battery device in the microgrid system scene; 2, based on photovoltaic and wind power output scene generation and elimination technologies, analyzing the uncertainties of photovoltaic output and wind power output, and eliminating the fluctuation influences of the output of photovoltaic and wind power renewable energy sources; 3, establishing day-ahead combined optimization scheduling model; 4, establishing a microgrid real-time optimization scheduling model; 5, based on an improved particle swarm optimization algorithm, solving the microgrid day-ahead combined optimization scheduling model and the microgrid real-time optimization scheduling model, and obtaining a multi-energy complementation microgrid operation strategy under multi-time scales. According to the invention, the operation cost of the microgrid is lowered, the utilization efficiency of energy is fully improved, and the method has an important effect on the aspect of peak shaving and load shifting of a power grid.

A railcar-moving vehicle comprises a modified semi-tractor, having a highway mode for operation on roadways, and a rail mode for operation on rails. The vehicle includes an elongate frame with selectively extendable high rail wheels for guiding the vehicle on rails, and rubber-tired drive wheels for operation on roadways. The rubber-tired drive wheels are configured to support the vehicle on a roadway in highway mode, and to contact the rails in rail mode. A moveable weight is disposed on a rear portion of the frame. A load-shifting mechanism moves the moveable weight between a rearward position for rail mode and a forward position for highway mode.

The invention discloses an active power distribution network scheduling method combined with the V2G technology, and belongs to the technical field of power system economic scheduling. The schedulingmethod uses the V2G technology to control the charging and discharging of electric vehicles, considers the influence of electric vehicle access on the active power of an line exit to perform day-aheadscheduling on the distributed energy and stored energy on the basis of taking the electric vehicle as an energy storage system, performs real-time scheduling on operating distributed power generationunits according to the various types of distributed energy output costs, performs real-time scheduling of the stored energy with minimum energy storage output fluctuation cost, realizes the consumption of distributed energy, improves the utilization rate of renewable energy, controls the charging and discharging of electric vehicles through the V2G system, performs load shifting on the power gridon the premise of meeting the travel of electric vehicle users, reduces the peak-to-valley difference of the power distribution network, and improves the economy and stability of grid operation.