Title :
Advanced Islanding Detection Functionality for Future Electricity Distribution Networks
Author :
Laaksonen, Hannu
Author_Institution :
Medium Voltage Products, ABB Oy, Vaasa, Finland
Abstract :
Islanding detection methods can be divided into communication-based and local detection-based methods. Proposed local passive detection methods have traditionally been dependent on the distributed generation unit type. A large nondetection zone (NDZ) near a power balance situation and unwanted distributed generation tripping due to other network events have also been major drawbacks of traditional, passive local islanding detection methods. In this paper, a new passive local multicriteria-based islanding detection algorithm with fault detection and islanding verification logic is presented. This new islanding detection algorithm, measuring voltage unbalance and voltage total harmonic distortion from all phases, is able to detect very fast and selectively islanding situations in a perfect power balance without NDZ with a simultaneous utilization of the available fault detection information and novel islanding verification logic. In addition to the new multicriteria-based islanding detection method, the fault detection information and islanding verification logic could also be used together with any other known passive islanding detection methods, that is, parameters which are not specified in the fault-ride-through (FRT) requirements of the future grid codes, to improve the performance of these methods in terms of reliability and speed of detection.
Keywords :
distributed power generation; fault diagnosis; harmonic distortion; power distribution faults; power distribution reliability; FRT requirement; NDZ; advanced islanding detection functionality; communication-based method; detection speed; distributed generation unit type; fault detection information; fault-ride-through requirement; future electricity distribution networks; future grid codes; islanding detection method; islanding verification logic; local detection-based method; nondetection zone; passive local multicriteria-based islanding detection algorithm; power balance situation; reliability; unwanted distributed generation tripping; voltage total harmonic distortion; voltage unbalance measurement; Detection algorithms; Fault detection; Power distribution; Power system reliability; Smart grids; Voltage measurement; Distributed generation; islanding; islanding detection; loss-of-mains protection; smart grids;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2013.2271317