Islanding detection of grid connected distributed generators using TLS-ESPRIT
Abstract
A critical protection requirement for grid connected distributed generators (DG) is anti-islanding protection. In this paper, a new islanding detection method is proposed based on monitoring the generator's frequency. Two new features, the frequency of oscillation and the damping factor of the generator's frequency output waveform, are extracted using the total least square-estimation of signal parameters via rotational invariance techniques (TLS-ESPRIT) algorithm. The proposed method has been tested under various scenarios such as load change, short circuit, and capacitor switching.
- Publication:
-
Electric Power Systems Research
- Pub Date:
- January 2007
- DOI:
- 10.1016/j.epsr.2006.02.010
- Bibcode:
- 2007EPSR...77..155Z
- Keywords:
-
- DG;
- distributed generation;
- TLS-ESPRIT;
- total least square-estimation of signal parameters via rotational invariance techniques;
- NDZ;
- non-detective zone;
- AFD;
- active frequency drift;
- SMFS;
- slip mode frequency shift;
- THD;
- total harmonic distortion;
- FFT;
- fast Fourier transform;
- OVP/UVP;
- over/under voltage;
- OFP/UFP;
- over/under frequency;
- Distributed generation;
- Islanding detection;
- Fault currents;
- Power distribution