Abstract:
A system and method for protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines. The method includes detecting the grid fault on the electrical system(402); taking one or more first actions from a first set of actions based on the detected grid fault on the electrical system(404); detecting at least one operating condition of the electrical system after taking one or more first actions from the first set of actions based on the detected grid fault on the electrical system(406); and taking one or more second actions from a second set of actions based on the detected at least one operating condition of the electrical system(408).
Abstract:
In one aspect, a method for protecting one or more electrical machines during an islanding event is provided. The method includes connecting one or more electrical machines to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least on phase of electrical power from the one or more electrical machines; electrically coupling at least a portion of a control system to at least a portion of the AC electric power system; coupling at least a portion of the control system in electronic data communication with at least a portion of the one or more electrical machines; and detecting an islanding of the one or more electrical machines based on one or more conditions monitored by the control system.
Abstract:
A power converter system (100) includes a converter (128) configured to be coupled to a power generation unit (102) for receiving power from the power generation unit, and a bus (132) coupled to the converter, wherein a voltage is generated across the bus when electricity is conducted through the power converter system. The power converter system also includes an inverter (130) coupled to the bus, wherein the inverter is configured to supply power to an electrical distribution network (106). A control system (164) is coupled to at least one of the converter and the inverter, wherein the control system is configured to adjust an operation of at least one of the converter and the inverter to reduce the voltage across the bus during at least one of a low voltage event and a high voltage event.
Abstract:
A drive device and method for controlling a rotating machine. The drive device includes plural inverters configured to transform first alternate currents (AC); DC links connected to the plural inverters and configured to transmit the DC currents; plural converters connected to the DC links and configured to transform the DC currents received from the DC links to second AC currents, where the plural converters are connected in series; semiconductor switches configured to switch the second AC currents and to sustain a short circuit during a failed mode, the semiconductor switches being provided inside the plural converters; and a controller connected to gates of the semiconductor switches and configured to switch on and off, when a semiconductor switch in a converter is in a failed mode, remaining semiconductor switches in the converter such that an AC current passes the converter.
Abstract:
A drive device and method for controlling a rotating machine. The drive device includes plural inverters (60) configured to transform first alternate currents, AC; DC links (62a, 62b)connected to the plural inverters (60) and configured to transmit the DC currents; plural converters (64) connected to the DC links (62a, 62b) and configured to transform the DC currents received from the DC links (62a, 62b) to second AC currents, where the plural converters (64) are connected in series; semiconductor switches (68) configured to switch the second AC currents and to sustain a short circuit during a failed mode, the semiconductor switches (68) being provided inside the plural converters (64); and a controller (80) connected to gates (72) of the semiconductor switches (68) and configured to switch on and off, when a semiconductor switch (68) in a converter (64) is in a failed mode, remaining semiconductor switches (68) in the converter (64) such that an AC current passes the converter (64).
Abstract:
The invention described herein pertains to a solid pharmaceutical composition comprising EC145 for reconstitution to provide a solution for intravenous injection, particularly to a lyophilized solid pharmaceutical composition comprising EC145 which has adequate stability for storage at ambient temperature and which is capable of redissolving in an aqueous diluent prior to administration, as well as a process for its manufacture, drug products comprising the composition and methods for using the composition for treating cancer.
Abstract:
Tubulysins are a series of naturally occurring cytotoxic agents that are of interest as anticancer therapeutic agents. Processes and intermediates useful for preparing naturally occurring and non-naturally occurring tubulysins and analogs and derivatives thereof are described.