| Andritz Hydro GmbH Patent applications |
| Patent application number | Title | Published |
|---|
| 20120098335 | ENERGY SUPPLY IN AN ELECTRIC NETWORK - The invention relates to a device and a method that can enable generators for producing electrical energy to be kept stable on the network during and following a line failure, such as a voltage dip. This requirement is defined in the network connection conditions of many network operators and must be observed for installations of a certain power. According to the invention, during a line failure, a load is inserted, enabling the energy that can no longer be supplied to the electric network due to the voltage drop to be absorbed by the load. | 04-26-2012 |
| 20110216449 | METHOD AND APPARATUS FOR FAULT DETECTION OF SERIES DIODES IN RECTIFIERS - A method and apparatus for fault detection of series diodes in rectifiers is disclosed, wherein the voltages across one or both of the individual diodes, and/or the voltage across the pair of diodes are measured to determine a ratio between two of those voltages. The ratio is then analyzed to determine if a fault (e.g., a short circuit or an open circuit) is present. In some embodiments, circuitry can be included to compensate for the normal variations in diode characteristics (e.g., reverse leakage current, reverse recovery charge) between the pair of series diodes to minimize the potential for erroneous fault detection. | 09-08-2011 |
