Patents by Inventor Andrew J. Roscoe

Andrew J. Roscoe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9118196
    Abstract: Distributed power generation systems generally include a number of power sources and electrical power loads interconnected by a distribution network. Electrical switches and fuses are provided such that local groups of power sources and power loads can be established. Should there be a degradation in the distribution network in terms of a set of criteria such as electrical frequency, current or voltage then the switch or fuse may be thrown to establish each local group as an island. By monitoring divergence from a set of criteria a method and controller may be utilised whereby the distribution network as a whole is considered and configured to establish virtual islands which operate prior to the establishment whether inadvertently or deliberately of actual islands within the distribution network. In such circumstances the transition from normal operation for the distribution network to islanded operation for the distribution network is less severe.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: August 25, 2015
    Assignee: ROLLS-ROYCE plc
    Inventors: Andrew J Roscoe, Richard C Knight, David R Trainer
  • Patent number: 8497599
    Abstract: A local electrical system having an electrical generator is connected to an electrical generator network. The local electrical system has a controller to avoid the non-detection zone of loss-of-mains relays. The controller is arranged to monitor the real power flow from the electrical generator network to the local electrical system and to determine if the absolute value of the real power flow is below a first predetermined value to determine if there is a close match between the power requirements of the local electrical system and the electrical generator. If there is a close match, then the controller is arranged to monitor the reactive power flow the same way. If there is a close match also with the reactive power, then the controller is arranged to adjust the target reactive power output from the electrical generator of the local electrical system.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: July 30, 2013
    Assignee: Rolls-Royce PLC
    Inventor: Andrew J. Roscoe
  • Publication number: 20120104847
    Abstract: Distributed power generation systems generally include a number of power sources and electrical power loads interconnected by a distribution network. Electrical switches and fuses are provided such that local groups of power sources and power loads can be established. Should there be a degradation in the distribution network in terms of a set of criteria such as electrical frequency, current or voltage then the switch or fuse may be thrown to establish each local group as an island. By monitoring divergence from a set of criteria a method and controller may be utilised whereby the distribution network as a whole is considered and configured to establish virtual islands which operate prior to the establishment whether inadvertently or deliberately of actual islands within the distribution network.
    Type: Application
    Filed: April 29, 2010
    Publication date: May 3, 2012
    Applicant: ROLLS-ROYCE PLC
    Inventors: Andrew J. Roscoe, Richard C. Knight, David R. Trainer
  • Publication number: 20110068631
    Abstract: A local electrical system having an electrical generator is connected to an electrical generator network. The local electrical system has a controller to avoid the non-detection zone of loss-of-mains relays. The controller is arranged to monitor the real power flow from the electrical generator network to the local electrical system and to determine if the absolute value of the real power flow is below a first predetermined value to determine if there is a close match between the power requirements of the local electrical system and the electrical generator. If there is a close match, then the controller is arranged to monitor the reactive power flow the same way. If there is a close match also with the reactive power, then the controller is arranged to adjust the target reactive power output from the electrical generator of the local electrical system.
    Type: Application
    Filed: May 13, 2009
    Publication date: March 24, 2011
    Applicant: ROLLS-ROYCE PLC
    Inventor: Andrew J. Roscoe
  • Patent number: 6873923
    Abstract: Representative embodiments are directed to systems and methods for processing analyzer trace data of a multi-tone signal to more accurately estimate the frequencies and amplitudes of the tones of the multi-tone signal. Specifically, trace data may be processed to determine peak trace points. For each identified peak point, an error minimization algorithm minimizes the sum of differences between a plurality of trace points surrounding the respective peak point and the predicted Fourier transform through a raised-cosine window of a theoretical tone. The result of the minimization algorithm identifies the amplitude and frequency of a tone of the multi-tone signal with appreciable degree of accuracy.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: March 29, 2005
    Assignee: Agilent Technologies, Inc.
    Inventor: Andrew J. Roscoe