Anti-islanding protection systems for synchronous machine based distributed generators

Ye, Zhihong; Du, Pengwei; Nelson, John Keith; Miller, Nicholas Wright; Walling, Reigh Allen

Title: Anti-islanding protection systems for synchronous machine based distributed generators

Patent · Tue Apr 10 00:00:00 EDT 2007

OSTI ID:1531526

Ye, Zhihong; Du, Pengwei; Nelson, John Keith; Miller, Nicholas Wright; Walling, Reigh Allen

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.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC36-99GO10337; NAD-1-30605-01

Assignee:: General Electric Company (Niskayuna, NY)

Patent Number(s):: 7,202,638

Application Number:: 10/966,665

OSTI ID:: 1531526

Resource Relation:: Patent File Date: 2004-10-15

Country of Publication:: United States

Language:: English

References (10)

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