摘要:
The invention relates to a method of calculating an electrical output of a wind power plant comprising a plurality of wind turbines. Instead of calculating the electrical output of the wind power plant as a simple aggregation of the outputs of each wind turbine, the method takes into account parameters which may vary stochastically throughout the wind power plant, e.g. pitch angle, stiffness in drive train, different possible production with regard to reactive and active effect, mechanical component properties as well as variability in relation to communication times between a power plant controller and the individual wind turbines. The method proposes to make adjustment to a simple aggregation calculation method based on analysis of such stochastic varying parameters.
摘要:
The present invention relates to a method for controlling a voltage level of a power supply grid operationally connected to a source of electrical power, the method comprising the steps of determining a short circuit impedance of the power supply grid at a point of common coupling, calculating, using the determined short circuit impedance, a gain value of the power supply grid, and controlling the grid voltage level in accordance with the calculated gain value by applying said gain value as a gain parameter in a voltage controller. The method according to the present invention may be implemented as a method for configuring a voltage controller once and for all, or it may be implemented as a method for adaptively adjusting a gain of a voltage controller.
摘要:
Control systems, sensors and methods for controlling the fuel concentration in a fuel cell or a fuel cell stack are provided. In certain examples, the control system may be configured to detect a performance degradation, and the fuel concentration provided to the fuel cell may be adjusted in response to detection of the performance degradation.
摘要:
A method of producing a mainly carbonate bonded article includes a step of providing an alkaline granular material having one or more alkaline earth metal silicate phases. The method includes a step of compacting the granular material to obtain a compact of the granular material. The porosity of the compact is smaller than or equal to 37% by volume. The intrinsic permeability of the compact is at least 1·10−12 cm2. The method also includes a reacting step arranged to form at least 5% by weight of carbonates (CO32−), by reacting the granular material with carbon dioxide in the presence of water, thus transforming the compact into the article. In the reacting step, the compact, being unsaturated with moisture at the beginning of the reacting step, is brought in an atmosphere having carbon dioxide. The atmosphere is at a temperature of at least 70° C. and at a pressure of at least 0.5 MPa. The pressure is also higher than the saturated vapor pressure of water at the temperature. As a result, at least a portion of the carbonates are formed by reaction of the one or more alkaline earth metal silicate phases. Articles are also obtained by the method.
摘要:
Control systems, sensors and methods for controlling the fuel concentration in a fuel cell or a fuel cell stack are provided. In certain examples, the control system may be configured to detect a performance degradation, and the fuel concentration provided to the fuel cell may be adjusted in response to detection of the performance degradation.
摘要:
The Invention is an apparatus and method for charging a dry ice drinking vessel with dry ice. A dry ice drinking vessel has a dry ice chamber communicating with an interior of the dry ice drinking vessel through perforations. A body selectably holds a filter in engagement with a perforation of the dry ice chamber. Liquid carbon dioxide is discharged from a pressure vessel through a valve and flashes into carbon dioxide gas, a portion of which freezes to dry ice. The carbon dioxide gas and dry ice flow through an orifice into the dry ice chamber. The dry ice is prevented from leaving the dry ice chamber by the filter.
摘要:
An electronic device includes a radio tuner capable of receiving broadcast media contents and information about each of the broadcast media contents from a plurality of radio stations; a user communication interface configured for receiving from a user a list of desired broadcast media contents; a memory; and a processor. According to the invention the processor is responsible for accessing the list of desired broadcast media contents stored in the memory; the radio tuner is controlled to detect the radio stations to retrieve information of the broadcast media contents that are currently being, or are in the near future to be, broadcast from the radio stations; the retrieved information is compared with the list of desired broadcast media contents; and the user is alerted via the user communication interface if the comparison reveals that a broadcast media content that is currently being, or are in the near future to be, broadcast is comprised in the list of desired broadcast media contents.
摘要:
Provided are apparatuses and methods in a mobile transmission system for sharing data between mobile terminals. Application data such as a video image including, for example, a television program, a computer application, or a gaming application may be transmitted from one mobile terminal to another mobile terminal in real-time so that multiple users may view the data or video images simultaneously and in real-time.
摘要:
The present invention pertains to certain nucleic acid analogs and related kits that are useful for the capture, recognition, detection, identification, or quantification of certain chemical or biological entities.
摘要:
A method of accessing at a first portable communications terminal a data object comprising: a) requesting access at a first portable communications terminal to a data object; b) using a first data structure at the first portable communications terminal to identify a second remote and separate portable communications terminal where the data object is stored; c) fetching the data object from the second portable communications terminal to the first portable communications terminal.