摘要:
The risk of an extreme gust of wind hitting a wind turbine is estimated by gathering data from one or more sensors for use as training data. This data is acquired over a period of time and is converted in to a feature vector for a given time period by a statistical measure. A number of feature zones are formed, each zone relating to a different estimate of risk with each feature vector being assigned to a risk category. The risk category is defined with reference to the value of one or more chosen turbine parameters at the time the data was acquired. The feature zones are formed from from a measure of distance such as the mean and co-variance of feature vectors from within a given category. Live data is processed by measuring the mahalonobis distance from the feature vector of the live data to the centre of each zone and the risk of an extreme gust is assessed as that of the feature zone to which the mahalonobis distance is lowest.
摘要:
Attachment of electrical junction box mounts to junction box by a single step or through a single motion. Mounts may be constructed as a single part. Electrical junction box ceiling mount includes a spanning element for traversing an acoustical ceiling tile and a support element connected to the spanning element. The support element includes a fastener adapted to engage a sidewall of an electrical junction box, including one or more faces of the sidewall. The support element may also include a bracket configured to support a portion of a rim of the front opening of the electrical junction box. The fastener may include a bracket configured for an interference fit with the sidewall of the electrical junction box. The fastener may also include a bracket adapted to engage an outside face of the sidewall on opposing sides of the electrical junction box.
摘要:
A multi-drop serial bus to connect a master device to a plurality of slave devices on a data line includes a voltage divider network, comprising divider resistors in series on the data line between slave devices, and a voltage sensing device, connected to the data line, configured to detect a voltage order of signals from the slave devices, indicating a position of connection of each slave device.
摘要:
In embodiments of capacitive touch controls lockout, a computing device includes a touch-screen display for user interaction, and includes one or more capacitive touch controls for user selection as a device input to initiate a device action. The computing device also includes a lockout service that is implemented to disable one or more of the capacitive touch controls based on user interaction with the touch-screen display.
摘要:
Collection enhanced materials, flue gas additives, and methods of making the enhanced materials and flue gas additives are provided. In one embodiment, a down stream addition system configured to control material passing through a metering device from a vessel to a gaseous exhaust path extending between a unit and an exhaust flue of the unit is provided. In alternative embodiments, methods are provided for introducing at least one of a flue gas additive and a collection enhanced material to a gaseous exhaust stream exiting a unit; exposing and removing at least a portion of at least one a of flue gas additive and a collection enhanced material from a gaseous exhaust stream exiting a unit prior to entering an exhaust flue; and recycling at least a portion of material removed a from a gaseous exhaust stream exiting a unit back to the gaseous exhaust stream without passing through the unit.
摘要:
A wind turbine power plant comprises a plurality of wind turbines, each having a rated output and under the control of a power plant controller. The power plant also has a rated output which may be over-rated in response to one or more electricity pricing data, power plant age and operator demand. This may comprise a schedule of output set point changes which effect seasonal or intraday changes in electricity prices or which reflect aging of the power plant. It may also reflect the price of electricity on spot or futures markets. Once the over-rating of the power plant has been set, the output may be increased by over-rating individual turbines or operating turbines at rated power if the sum of the rated outputs of the turbines exceeds or is equal to the new power plant output set point.
摘要:
The risk of an extreme gust of wind hitting a wind turbine is estimated by gathering data from one or more sensors for use as training data. This data is acquired over a period of time and is converted in to a feature vector for a given time period by a statistical measure. A number of feature zones are formed, each zone relating to a different estimate of risk with each feature vector being assigned to a risk category. The risk category is defined with reference to the value of one or more chosen turbine parameters at the time the data was acquired. The feature zones are formed from from a measure of distance such as the mean and co-variance of feature vectors from within a given category. Live data is processed by measuring the mahalonobis distance from the feature vector of the live data to the centre of each zone and the risk of an extreme gust is assessed as that of the feature zone to which the mahalonobis distance is lowest.
摘要:
Embodiments of the invention provide methods, systems, and apparatus for determining a property of wind approaching a wind turbine. A light detection and ranging equipment may emit pulsed radiation into oncoming wind to detect properties of the wind at a plurality of predefined locations. A property of the wind approaching the wind turbine may be determined based on the property of wind measured at at least two predefined locations.
摘要:
Attachment of electrical junction box mounts to junction box by a single step or through a single motion. Mounts may be constructed as a single part. Electrical junction box ceiling mount includes a spanning element for traversing an acoustical ceiling tile and a support element connected to the spanning element. The support element includes a fastener adapted to engage a sidewall of an electrical junction box, including one or more faces of the sidewall. The support element may also include a bracket configured to support a portion of a rim of the front opening of the electrical junction box. The fastener may include a bracket configured for an interference fit with the sidewall of the electrical junction box. The fastener may also include a bracket adapted to engage an outside face of the sidewall on opposing sides of the electrical junction box.
摘要:
Material withdrawal apparatus and methods and systems of regulating material inventory in one or more units are provided. A material withdrawal apparatus includes a heat exchanger and a sensor. The heat exchanger includes a material inlet, material outlet, cooling fluid inlet, and cooling fluid outlet. The material inlet is coupled to the unit and the sensor is coupled to the heat exchanger to provide a metric indicative of the temperature at the material inlet; material outlet; cooling fluid inlet and cooling fluid outlet. Another embodiment of a material withdrawal apparatus includes a vessel having an outer wall, liner, fill port, and a discharge port. The liner at least partially covers the inner surface of the outer wall. The fill port and discharge port are defined in the vessel and the fill port is configured to receive withdrawn material from at least a unit. Other embodiments provide methods of withdrawing or regulating material in a unit.