The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2007
Filed:
Feb. 01, 2007
Zhihong YE, Schenectady, NY (US);
Pengwei Du, Troy, NY (US);
John Keith Nelson, Niskayuna, NY (US);
Nicholas Wright Miller, Delmar, NY (US);
Reigh Allen Walling, Clifton Park, NY (US);
Zhihong Ye, Schenectady, NY (US);
Pengwei Du, Troy, NY (US);
John Keith Nelson, Niskayuna, NY (US);
Nicholas Wright Miller, Delmar, NY (US);
Reigh Allen Walling, Clifton Park, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A system for providing anti-islanding protection of a synchronous machine based distributed generator includes a frequency sensor configured to generate a generator frequency signal, a bandpass filter configured for filtering the generator frequency signal, a governor controller configured for using the filtered frequency signal to generate a power feedback signal, and a governor summation element configured for summing the filtered frequency signal, the power feedback signal, and a reference power to provide an electrical torque signal. Another system includes a voltage sensor configured to generate a generator terminal voltage signal, a feedback power calculator configured for generating a reactive feedback power signal, a bandpass filter configured for filtering the terminal voltage signal, and a PI controller summation element configured for summing the filtered terminal voltage signal, the reactive power feedback signal, and a reference reactive power to provide an error signal.