Patent application number | Description | Published |
20120127766 | CONFIGURABLE HYBRID CONVERTER CIRCUIT - A circuit for a hybrid voltage source converter suitable for high voltage DC power transmission and reactive power compensation. The circuit comprises an assembly of electrically interconnected elements (Elements | 05-24-2012 |
20120182771 | CONVERTER WITH ACTIVE FAULT CURRENT LIMITATION - A voltage source converter for high voltage DC power transmission is disclosed. According to one aspect, the voltage source converter is connectable between a DC network and another electrical network to interconnect the DC network and the other electrical network. The voltage source converter includes a converter unit configured to convert power flowing between the DC network and the other electrical network and at least one fault unit. One or more of the fault units includes at least one fault module having a voltage source that is operable, in the event of a short circuit in a DC network connected to the voltage source converter, to produce a voltage that acts to reduce current flowing through the voltage source converter and the short circuit. | 07-19-2012 |
20150035364 | CONTROL CIRCUIT - A control circuit ( | 02-05-2015 |
20150108090 | CIRCUIT BREAKER APPARATUS - A circuit breaker apparatus ( | 04-23-2015 |
20150109709 | SHIELDING ASSEMBLY - An electrical field shielding assembly comprises at least one electrically conductive, shielding element ( | 04-23-2015 |
20150116881 | HIGH VOLTAGE DC CIRCUIT BREAKER APPARATUS - A circuit breaker apparatus for use in high voltage direct current (HVDC) power transmission is provided. The circuit breaker apparatus has one module or a plurality of series-connected modules, the or each module including: first, second, third and fourth conduction paths and first and second terminals for connection to an electrical network, each conduction path extending between the first and second terminals, the first conduction path including a mechanical switching element, the second conduction path including at least one semiconductor switching element, the third conduction path including a snubber circuit having an energy storage device and the fourth conduction path including a resistive element. | 04-30-2015 |
20150131189 | COMPOSITE HIGH VOLTAGE DC CIRCUIT BREAKER - A circuit breaker for high voltage direct current (HVDC) power transmission includes a module with a pair of terminals for connection to an electrical network, and four of conduction paths. Each first conduction path includes a mechanical switch connected in series with at least one first semiconductor switch to selectively allow current to flow between the first and second terminals through the first conduction path in a first mode of operation or commutate current from the first conduction path to the second conduction path in a second mode of operation. The second conduction path also has a semiconductor switch to selectively allow current to flow between the terminals through the second conduction path or commutate current from the second conduction path to the third conduction path in the second mode of operation. The third conduction path has a snubber circuit with an energy storage device to control a rate of change of voltage across the mechanical switch and oppose current flowing between the first and second terminals in the second mode of operation. The fourth conduction path has a resistive element to absorb and dissipate energy in the second mode of operation and divert charging current from the first and second terminals away from the energy storage device to limit a maximum voltage across the pair of terminals. | 05-14-2015 |
20150229121 | CIRCUIT INTERRUPTION DEVICE - A switching device ( | 08-13-2015 |