30 results about "Operating reserve" patented technology

A utility employs an active load management system (ALMS) to estimate available operating reserve for possible dispatch to the utility or another requesting entity (e.g., an independent system operator). According to one embodiment, the ALMS determines amounts of electric power stored in power storage devices, such as electric or hybrid electric vehicles, distributed throughout the utility's service area. The ALMS stores the stored power data in a repository. Responsive to receiving a request for operating reserve, the ALMS determines whether the stored power data alone or in combination with projected energy savings from a control event is sufficient to meet the operating reserve requirement. If so, the ALMS dispatches power from the power storage devices to the power grid to meet the operating reserve need. The need for operating reserve may also be communicated to mobile power storage devices to allow them to provide operating reserve as market conditions require.

A utility employs a method for estimating available operating reserve. Electric power consumption by at least one device serviced by the utility is determined during at least one period of time to produce power consumption data. The power consumption data is stored in a repository. A determination is made that a control event is to occur during which power is to be reduced to one or more devices. Prior to the control event and under an assumption that it is not to occur, power consumption behavior expected of the device(s) is estimated for a time period during which the control event is expected to occur based on the stored power consumption data. Additionally, prior to the control event, projected energy savings resulting from the control event are determined based on the devices' estimated power consumption behavior. An amount of available operating reserve is determined based on the projected energy savings.

A utility employs a method for generating available operating reserve. Electric power consumption by at least one device serviced by the utility is determined during at least one period of time to produce power consumption data, stored in a repository. A determination is made that a control event is to occur during which power is to be reduced to one or more devices. Prior to the control event and under an assumption that it is not to occur, power consumption behavior expected of the device(s) is generated for a time period during which the control event is expected to occur based on the stored power consumption data. Additionally, prior to the control event, projected energy savings resulting from the control event, and associated with a power supply value (PSV) are determined based on the devices' power consumption behavior. An amount of available operating reserve is determined based on the projected energy savings.

A utility employs a method for generating available operating reserve. Electric power consumption device(s) serviced by the utility is determined during period(s) of time to produce power consumption data, stored in a repository. A determination is made that a control event is to occur during which power is to be reduced to one or more devices. Prior to the control event and under an assumption that it is not to occur, power consumption behavior expected of the device(s) is generated for a time period during which the control event is expected to occur based on the stored power consumption data. Additionally, prior to the control event, projected energy savings resulting from the control event, and associated with a power supply value (PSV) are determined based on the devices' power consumption behavior. An amount of available operating reserve is determined based on the projected energy savings.

A utility employs a method for generating available operating reserve. Electric power consumption by at least one device serviced by the utility is determined during at least one period of time to produce power consumption data, stored in a repository. A determination is made that a control event is to occur during which power is to be reduced to one or more devices. Prior to the control event and under an assumption that it is not to occur, power consumption behavior expected of the device(s) is generated for a time period during which the control event is expected to occur based on the stored power consumption data. Additionally, prior to the control event, projected energy savings resulting from the control event, and associated with a power supply value (PSV) are determined based on the devices' power consumption behavior. An amount of available operating reserve is determined based on the projected energy savings.

A method of controlling a power system includes monitoring a load on an electrical grid, monitoring a power generation from one or more power producers connected to the electrical grid, wherein at least one of the one or more power producers is a power plant including a carbon dioxide capture system, and utilizing the carbon dioxide capture system of the one or more power producers as a operating reserve in response to an increase in the load on the electrical grid or a reduction in the power generation from one or more power producers connected to the electrical grid.

The invention discloses a power system operating reserve optimization method taking a risk and wind power generator into consideration. According to the method, the optimal configuration problem of a power system reserve capacity is taken into consideration by combining a probability and a result in the risk. A purpose of optimizing the integrated operating benefit of a power system containing wind power generation is taken as a target function, and a distribution scheme for the power system reserve is resolved through combination of a power balance equation taking wind power contribution into consideration, a generator output power constraint, a reserve climbing rate constraint, a load reserve demand quantity constraint taking wind power contribution fluctuation into consideration, a transmission line power constraint taking the wind power contribution fluctuation into consideration and a high power tie line N-1 fault constraint taking the risk into consideration. According to the method, the wind power generation contribution uncertainty and reserve support problem after a fault are taken into full consideration, the integrated risk of the power system is minimized, the optimal configuration of resources is realized well, and certain reference value for power grid planning and operation is achieved.

In order to relieve the operator of a combing machine from having to handle the heavy comb reels (4, 7), a mechanically operated reserve reel trough (6) is provided. It can be lowered to such a level that it can easily roll comb reels, even from the lowest position into which they are delivered by the combing machine, into the reserve reel trough. On the other hand it can be raised to such a high level that the reserve reels roll by themselves into working position on the reel cylinders (2, 3). The mechanical operation is effected preferably by a fluidically (pneumatic or hydraulic) operable work element with cylinder and piston which is arranged between the frame of the combing machine and the reserve reel trough.

The application discloses a security constrained economic dispatching method, system, device and computer readable storage medium, with the goal of realizing reserve requirements for dynamic operation. After considering the operating reserve price of a power generator set and the objective function and constraint conditions of the operating reserve plan. The security constrained economic dispatching method comprises the following steps: calculating the output plan and operating reserve plan of the set through substituting the operational reserve requirement of given power grid into the objective function and the constraint conditions; obtaining the operational reserve requirement of the current power grid using the operational reserve plan; deciding whether the coefficient of convergenceis met by comparing the operational reserve requirements of current power grid to the previous operational reserve requirements of current power grid, and if the coefficient of convergence is not met,substituting the operational reserve requirements of current power grid into the objective function and the constraint conditions again to obtain the next operational reserve requirements of the power grid and performing repeated iteration until the coefficient of convergence is met; outputting the operational reserve requirement of current power grid and the output plan of the set; the securityconstrained economic dispatching method reduces operating reserve level of the system and improves electric energy availability of the power generator set and running benefit of the power grid.

The method comprises the following steps: S1. planning and designing the upper layer problem: the upper layer objective function is formula (1), and the master plan and operation cost are converted into function value according to factor gamma; S2. lower-level problems in planning and designing: the lower-level problems represent the goal of the power supply organization, that is, to maximize thereserve capacity provided by the micro-grid to support the operation of the power system. In the context of microgrid applications, the present invention proposes a two-layer model method to minimizecoupling design and operating costs. In the method, the non-collinear bi-level power and reserve planning formulas for power supply and microgrid are proposed. The power supply can request reserve capacity from the microgrid planner, which is designed to minimize the planning and operating costs of the microgrid planner. The proposed model can also better represent the possible conflicts between the micro-grid planner and the power supply.

Example implementations described herein are directed to managing the operation of a plurality of electric vehicles (EVs) for transportation service, power system operating reserve service and operation planning, which is utilized to determine whether to use each EV for transportation travel or power system operating reserve supply for a given time period and location. Such management allows for the increase of the total operation value by transportation travel and power system operation reserve supply.

An arrangement comprising a regenerative energy generator and a store for electrical energy to be output to a grid, the regenerative energy generator including an energy converter for converting renewable energy sources into electrical energy and a power control unit which has an input for a target power output and controls the power generation by the regenerative energy converter, with a charge controller for the store also being provided, which sets a minimum operating reserve and outputs a signal for a target state of charge (SoC) of the store. In order to achieve improved utilization of the store, a correction unit is connected to the charge controller and continuously modifies the signal for the target state of charge (SoC). A sequence control unit is actuated by the correction unit and influences the power control unit of the regenerative energy generator according to an output value of the correction unit.