Title :
A novel converter integrable impedance measuring method for islanding detection in grids with widespread use of decentral generation
Author :
Bertling, F. ; Soter, S.
Author_Institution :
Inst. of Electr. Drives & Mechatronics, Dortmund Univ.
Abstract :
This paper proposes a method for measuring the impedance of the public grid for islanding detection by grid connected converters performing decentral power injection. Based on subharmonic (noncharacteristic to the grids fundamental frequency) test current injection and grid voltage frequency component detection to give a defined value for the frequency dependent impedance, a modulation of the subharmonic test currents amplitude with a pulse pattern assigns each converter an individually detectable "signature" for its test signal. This allows a larger number of converters to be operated within a grid segment without interference of their measurements causing unintended grid disconnections
Keywords :
amplitude modulation; distributed power generation; electric impedance measurement; power convertors; power grids; power system harmonics; testing; amplitude modulation; converter; decentral generation; decentral power injection; impedance measuring method; islanding detection; public grid; subharmonic test current injection; unintended grid disconnections; voltage frequency component detection; Distributed power generation; Frequency conversion; Frequency dependence; Impedance measurement; Mesh generation; Performance evaluation; Power measurement; Pulse modulation; Testing; Voltage;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on
Conference_Location :
Taormina
Print_ISBN :
1-4244-0193-3
DOI :
10.1109/SPEEDAM.2006.1649824
