Abstract: Systems and methods for maintaining the active power production of a fluid turbine and regulating the temperature of an electrical generating component by controlling the reactive power production are disclosed. A thermal parameter of the electrical generating component is monitored. If the electrical generating component exceeds a thermal parameter the reactive power production of the turbine is reduced. A fluid turbine may be de-rated to further reduce an electrical generating component's thermal parameter. A fluid turbine may shut down to further reduce an electrical generating component's thermal parameter. A fluid turbine's power production is re-started when the electrical generating component returns to an acceptable thermal parameter.

Abstract: Example embodiments are directed to fluid turbines that include a turbine shroud and a rotor assembly disposed within the turbine shroud. The rotor assembly includes a nacelle pivotally engageable with a tower structure and a slip ring disposed within the nacelle. The slip ring electrically connects one or more cables in the nacelle to one or more cables in the tower structure. The slip ring is engaged with the nacelle by a mounting apparatus which allows movement of the slip ring along at least one of an x-axis, a y-axis and a z-axis. Example embodiments are further directed to methods of maintaining untwisted electric cables in a fluid turbine.

Abstract: A fluid turbine comprises a turbine shroud and an optional ejector shroud. The turbine shroud and/or the ejector shroud are formed from a hard shell and a membrane. The hard shell forms a leading edge, a trailing edge, and an interior surface of the shroud. The membrane forms an exterior surface of the shroud. The resulting construction is lighter than previous turbine shrouds.

Abstract: A shrouded fluid turbine comprises an impeller and a turbine shroud surrounding the impeller. The inlet of the turbine shroud is flared. The shroud includes alternating inward and outward curving lobe segments along a trailing edge of the turbine shroud. The inward and outward curving lobe segments have exposed lateral surfaces, or in other words do not have sidewalls joining the inward and outward curving lobe segments. This allows for both transverse mixing and radial mixing of air flow through the turbine shroud with air flow passing along the exterior of the turbine shroud.