Abstract: Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, which is capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, including following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

Abstract: A method includes determining, by a control system, from among a plurality of categories, a current category of an incoming wind approaching a wind turbine, and setting, by the control system, a yaw bias of the wind turbine based on the current category. In some examples, the plurality of categories includes two or more wind conditions, such as a first wind condition in which wind contacting an upper rotor of the wind turbine is veering and wind contacting a lower rotor of the wind turbine is veering, a second wind condition in which the wind contacting the upper rotor of the wind turbine is veering and the wind contacting the lower rotor of the wind turbine is backing, and so on.

Abstract: A method includes determining, by a control system, from among a plurality of categories, a current category of an incoming wind approaching a wind turbine, and setting, by the control system, a yaw bias of the wind turbine based on the current category. In some examples, the plurality of categories includes two or more wind conditions, such as a first wind condition in which wind contacting an upper rotor of the wind turbine is veering and wind contacting a lower rotor of the wind turbine is veering, a second wind condition in which the wind contacting the upper rotor of the wind turbine is veering and the wind contacting the lower rotor of the wind turbine is backing, and so on.

Abstract: Control systems are described that mitigate the effects of icing events on wind turbines. Example methods include determining, with a control system, that an icing event has begun to affect the wind turbine; based on a determination that the icing event has begun to affect the wind turbine, changing a phase of the wind turbine with the control system to an operational-icing phase by modifying angles of attack of blades of the wind turbine via changing blade pitch angles, wherein the wind turbine continues to generate electrical power when the wind turbine is in the operational-icing phase; and based on a determination that electrical power generation of the wind turbine is below a threshold, changing the phase of the wind turbine with the control system to a stopped-icing phase, wherein rotation of the blades of the wind turbine is halted when the wind turbine is in the stopped-icing phase.

Abstract: Control systems are described that mitigate the effects of icing events on wind turbines. Example methods include determining, with a control system, that an icing event has begun to affect the wind turbine; based on a determination that the icing event has begun to affect the wind turbine, changing a phase of the wind turbine with the control system to an operational-icing phase by modifying angles of attack of blades of the wind turbine via changing blade pitch angles, wherein the wind turbine continues to generate electrical power when the wind turbine is in the operational-icing phase; and based on a determination that electrical power generation of the wind turbine is below a threshold, changing the phase of the wind turbine with the control system to a stopped-icing phase, wherein rotation of the blades of the wind turbine is halted when the wind turbine is in the stopped-icing phase.