Anti-islanding protection systems for synchronous machine based distributed generators
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.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC36-99GO10337
- Assignee:
- General Electric Company (Niskayuna, NY)
- Patent Number(s):
- 7,271,571
- Application Number:
- 11/670,067
- OSTI ID:
- 1531538
- Country of Publication:
- United States
- Language:
- English
Protection against loss of utility grid supply for a dispersed storage and generation unit
|
journal | July 1993 |
Monitoring changes in system variables due to islanding condition and those due to disturbances at the utilities' network
|
conference | January 1999 |
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