About 186 results
https://drivepatents.com/patents/967942 · 29 Oct 2014
A grid interconnection apparatus 1 includes a voltage conversion section 11 including DC/DC converters 21a to 21d to step up or down output voltages of DC power sources 2a to 2d. The voltage conversion section 11 combines DC power outputs from the DC/DC co...
https://drivepatents.com/patents/968745 · 15 Oct 2014
A power conversion system is disclosed including a DC bus for receiving DC power, a power converter for converting the DC power to AC power, and a controller (164). The controller (164) includes an active power regulator (210) for generating a phase angle ...
https://drivepatents.com/patents/968694 · 15 Oct 2014
A gateway controller allows a plurality of individual power generation units coupled to an electrical distribution grid to be controlled in a coordinated fashion. The gateway controller allows control of the plurality of individual power generation units a...
https://drivepatents.com/patents/969896 · 17 Sep 2014
Methods and apparatus are presented for unintentional islanding detection for grid tie converters in which the phase angle disturbance is introduced by modification of grid side converter switching control signals and a mismatch of reactive power between g...
https://drivepatents.com/patents/970326 · 10 Sep 2014
The present subject matter is directed to systems and methods 300 for controlling variable speed generators, particularly converters associated with doubly-fed induction generators (DFIG) 100 to permit use of harmonic attenuating filters 112, 212, 214 that...
https://drivepatents.com/patents/971102 · 20 Aug 2014
An open-circuit voltage value acquisition unit (104) acquires a first open-circuit voltage value of a first power supply, when a first switch (Tra) is in an off period while a potential controller (102) performs control such that a voltage at a first backf...
https://drivepatents.com/patents/971036 · 20 Aug 2014
A hydroelectric power generation apparatus characterised in that it comprises: - a hydro turbine (2) having a rotary turbine shaft (21); and - an asynchronous generator (3) having a rotor winding (31), which is solidly connected to a rotor shaft (32) that ...
https://drivepatents.com/patents/971292 · 13 Aug 2014
Occasionally an input voltage at a boost circuit (20a,20b) at which combined power of at least two of photovoltaic strings (200a,200b,200c) is maximized cannot be tracked by MPPT control. A voltage identification unit (inside control device 100) identifies...
https://drivepatents.com/patents/971999 · 30 Jul 2014
The present invention relates to an electric energy conversion method and system with at least two conversion units (14), comprising control means (12) establishing the maximum output current of the operative conversion modules, as well as the commutation ...
https://drivepatents.com/patents/971869 · 30 Jul 2014
There is a demand to detect a short-circuit current value of a power supply such as a photovoltaic cell without adding a new circuit such as a transistor. A controller (102) turns on a first switch while setting an output side of a first boost circuit (20a...