Islanding detection and protection method

Details Islanding detection and protection method Islanding detection and protection method

2007-09-25

2007-09-25

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C363S056100, C702S057000, C702S058000, C702S060000

Reexamination Certificate

active

11435750

ABSTRACT:
An islanding detection and protection method of a parallel-type power converter is proposed, which performs perturbation to a power system to detect the frequency of the system voltage and the variation of the magnitude of the negative-sequence voltage as the basis for deciding the occurrence of an islanding operation. When the system operates normally, the frequency or phase and magnitude of the system voltage and the magnitude of the negative-sequence voltage won't be affected by the perturbation. On the other hand, if an islanding operation occurs, this perturbation will cause an apparent drift of the frequency or phase and magnitude of the system voltage and the magnitude of the negative-sequence voltage. Through detection of this apparent drift, the perturbation can be amplified by means of positive feedback to quickly detect the islanding operation phenomenon and trigger the protection mechanism.

REFERENCES:
patent: 5224011 (1993-06-01), Yalla et al.
patent: 5493485 (1996-02-01), Okado

Affiliated with

Also associated with

Rating

Islanding detection and protection method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Islanding detection and protection method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Islanding detection and protection method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3788847