Abstract: A combined heat and power plant has at least one primary heat source thermally connected to a heat distribution network for heat energy via one or more primary heat exchangers. At least one secondary heat source is thermally connected to one or more energy converters arranged to, when an amount of heat energy is supplied from the at least one secondary heat source, generate an amount of electrical energy for an internal electricity distribution network in the combined heat and power plant. A method is for operating a combined heat and power plant.

Abstract: A vertical axis wind turbine system having a vertical mast with one or more turbine units supported thereon. The turbine units are of modular construction for assembly around the foot of the mast; are vertically moveable along the height of the mast by a winch system; and are selectively interlocking with the mast to fix the turbine units in parked positions. The turbine system and each turbine unit includes a network of portals and interior rooms for the passage of personnel through the system, including each turbine unit. The electrical generators, and other sub-components, in the turbine units are of modular construction that permits the selective removal and replacement of component segments, including the transport of component segments through the portals and interior rooms of the turbine system while the turbine units remain supported on the mast. The electrical generators are also selectively convertible between AC generators and DC generators.

Abstract: A wind power turbine configured to generate electric energy has: a supporting structure; a nacelle; a blade assembly which rotates with respect to the nacelle; a first and second electric machine having, respectively, a substantially coaxial first and second stator, and a first and second rotor coupled to the first and second stator to rotate about a first and second axis; a transmission configured to connect the first rotor to the second rotor; a control device configured to control the wind power turbine; and a detection system connected to the control device to detect relative movement between the first rotor and the second rotor.

Abstract: A wave energy convertor utilizes reciprocating rotational motion of a float and float arm caused by repeated wave action to drive an electrical generator in order to produce electricity. A mount is anchored into an area of water experiencing wave action. A pulley support frame is connected to the mount. A float arm is lifted repeatedly by waves, producing rotational motion on an input axle. At least one pulley system transfers power from the input axle to an output axle connected to the electrical generator. The at least one pulley system multiplies the input rotation through mechanical advantage into a much faster angular speed at the output axle. A ratchet gear disengages influence of the float arm on the system on the downstroke. A flywheel stores rotational energy in order to maintain stable rotational rate on the downstroke.

Abstract: A power generating apparatus may use fluid flow which may include intermittent fluid flow. Such a power generating apparatus may harness electric power from intermittent wind sources but may also be deployed in near constant winds. The apparatus includes airfoils that are pivotally attached to vertical supports. The supports are attached to power generating devices. As wind blows, the airfoils lift upward relative to the horizontal. The motion may be transferred by actuating a hydraulic cylinder. This motion pressurizes the cylinder and the pressurized hydraulic fluid may later be transferred into electric power via a hydraulic generator. The upward motion may also be transferred to a permanent magnet alternator.

Abstract: A sail on a chain wind turbine comprises a plurality of preferably rectangular sails each attached at its edges to a pair of parallel looped chains. The chains are each routed along a triangular path engaging three circular sprockets selected for low friction rotation. The upper extent of the assembly forms the top apices of the chain triangles with two opposing sprockets located at each such apex. The remaining circular sprockets form the base of the triangle with one sprocket located at each end of the base on each side of a frame. The two chains are precisely congruent to one another with respective sprockets being axially aligned. One such pair of aligned sprockets is interconnected by a shaft which rotates from the force of a wind against the sails. A linkage rotates an electrical generator shaft as the sails catch the wind.

Abstract: The subject matter described herein includes an active compensatory augmented diode bridge rectifier system. According to one aspect, the system includes a generator unit configured to generate a current flow made up entirely of active current and a diode rectifier configured to receive the active current from the generator unit, to direct the active current to a connected power grid, and to receive a reactive current. The system further includes an active compensator configured to optimize the generator unit to produce the active current and to generate the reactive power used to facilitate the operation of the diode rectifier.

Abstract: An auxiliary mesh type starter, including a motor, an electromagnetic switch connected with the motor and relays connected with the electromagnetic switch, wherein the electromagnetic switch includes a holding coil, an attracting coil, a stop seat arranged at the rear end parts of the holding coil and the attracting coil, a plunger arranged on the inner circumferences of the holding coil and the attracting coil and capable of sliding in an axial direction, a return spring for applying return force to the plunger, and a contact point arranged at the rear end of the plunger; and the relays are connected to a key switch, wherein the relays include a first relay and a second relay, with the head end of the attracting coil connects to the key switch via the first relay, and the head end of the holding coil connects to the key switch via the second relay.

Abstract: A rotary electric starter machine including an electric motor, a housing surrounding the motor, and a pinion connected to the motor, at least one of the motor and the housing comprising a magnetically active portion of the machine, wherein the magnetically active motor portion is made of an enhanced performance steel material having a flux density at a given magnetizing force level that is at least about 20% less than the flux density at the given magnetic force level of a conventional low carbon steel material chosen from the group consisting of AISI 1008 and AISI 1010 steel.

Abstract: A wind turbine axial flux generator for converting wind into electricity includes: a generator rotor which is rotatable about an axis; and a stator; wherein one of the generator rotor and the stator is provided with magnets and the other is provided with electrical windings in which electricity is induced by relative movement between the generator rotor and the stator; and wherein the generator further includes: an up-wind air gap on the up-wind side of the electrical windings, between the electrical windings and at least some of the magnets on the up-wind side of the electrical windings; a down-wind air gap on the down-wind side of the electrical windings, between the electrical windings and at least some of the magnets on the down-wind side of the electrical windings; and at least one wind guide for directing the wind so that the wind flows through both the up-wind air gap and the down-wind air gap in order to cool the electrical windings from both the up-wind and down-wind sides of the electrical windings.

Abstract: In a power generation facility, there are provided a plurality of diesel engines, a plurality of turbochargers driven by exhaust gas from the diesel engines, a plurality of power generators connected to the plurality of turbochargers, a plurality of converters for converting AC power generated by the plurality of power generators to DC power, one inverter for converting the DC power outputted from the plurality of converters to AC power, and a main controller for controlling the converters in accordance with the AC power from the inverter, by which stable electric power can be generated.

Abstract: A method for initializing a generator may include sending a field reference voltage to an exciter that may provide a direct current (DC) current and a DC voltage to a rotor of a generator based on a current set point that corresponds to the field reference voltage. The method may then include receiving a voltage feedback signal output by the generator, determining one or more locations of one or more poles of the generator based on the voltage feedback signal, and sending one or more firing signals to one or more switches of a starter after determining the locations of the poles, such that the switches couple the voltage to a stator of the generator.

Abstract: A multi-source passive energy power generation system that includes use of solar radiation to drive an air compressor and compressed air is then delivered to a power wheel positioned within a fluid tank. The air pressure is delivered to air chambers mounted upon tubular spokes of the power wheel and buoyancy force is used to drive rotation of the power wheel within the fluid tank. In some embodiments weights are added to translate along the tubular spokes under the guidance of cam surfaces to a rotational force to the power wheel from the force of gravity.

Abstract: A method for regulating the output voltage of the alternator of a generator set, the generator set including a heat engine driving the alternator and the alternator including a rotor having a pole wheel. The method includes the following step: modifying the current in the pole wheel, at least during an increase in the load at the outlet of the alternator, in such a way as to bring the output voltage of the alternator to a value lower than the value before the increase in the load, the modification of the current in the pole wheel depending on the deceleration of the heat engine.

Abstract: A wind turbine-permanent magnet synchronous generator (WT-PMSG) system includes a variable speed permanent magnet synchronous generator and utilizes a static synchronous compensator (STATCOM) connected on the grid side of the system. A PI/PID controller is designed to apply modulation index control signals to the generator side-converter since the modulation index of the generator side-converter has been determined to have the higher controllability to damp the oscillatory modes of the system when the STATCOM is located at the grid side converter. The controller gains are tuned through a frequency based optimization procedure. This configuration dampens voltage instabilities to provide LVRT compliance.

Abstract: A building with an integrated wind-powered electricity generation system includes a plurality of floors, wherein each of the plurality of floors includes usable space. The building further includes a vacuum space between adjacent ones of the plurality of floors and a plurality of vertical axis wind turbines, wherein each of the plurality of vertical axis wind turbines is positioned adjacent the open vacuum space. The building further includes at least one electricity generator operably coupled to the plurality of vertical axis wind turbines. At least one of the vertical axis wind turbines includes a plurality of louvers extending around a portion of the outer circumference of the vertical axis wind turbine.

Abstract: A hybrid-vehicle power generator control apparatus. Based on a difference electric power value, which corresponds to the difference between an electric power generator power command value given by a higher-hierarchy control unit and an output voltage value of an electric power generator, an electric power generator control unit calculates an electric power generator rotation speed command value and based on the calculated electric power generator rotation speed command value, the electric power generator control unit PWM-controls an output of the electric-power conversion system that performs electric conversion between the electric power generator and a battery, so that the rotation speed of the electric power generator is made to keep track of the electric power generator rotation speed command value and the output electric power value of the electric power generator is made to keep track of the electric power generator power command value.

Abstract: There is provided a power generation park (100) having a power output (108) for providing electrical output power (150) to an electricity network (128). A power generation device (102a, . . . 102n) has a converter device (106) configured for receiving input power (142) from a power generator (104) and providing, in response thereto, the electrical output power (150) to the power output (112). The power generation park (100) also has a controller (122) being configured for receiving an oscillation indicating signal (126) indicative of a power oscillation in the electricity network (108), the controller (122) being further configured for providing a damping control signal (132) in response to the oscillation indicating signal (126); the converter device (106) being configured for modulating the electrical output power (150) in response to the damping control signal (132) so as to damp the power oscillation in the electricity network (128).

Abstract: Systems for providing electrical power to one or more wind turbine electrical components is provided comprising an electrical grid and an auxiliary power source for providing electrical power, and one or more wind turbines. Each of the wind turbines includes a wind turbine generator, one or more electrical components, a main voltage transformer for connecting the wind turbine generator to the grid and a switchgear arranged between the main voltage transformer and a point of connection to the grid. One or more switches for alternately connecting either said electrical grid or said auxiliary power source to the switchgears of the wind turbines are provided. The switchgears comprise a switchgear voltage transformer, the switchgear voltage transformer includes primary and secondary windings, the primary windings receiving power from the electrical grid or auxiliary power source, and the secondary windings delivering electrical power to the wind turbine electrical components.

Abstract: A direct drive wind turbine has a a rotor and a generator. The rotor includes a hub and a plurality of blades rotatably mounted on a frame. The generator includes a generator rotor and a generator stator. There are one or more dampers arranged between the rotor and the generator rotor and extending at least partially in an axial direction.