An Improving Derivation Algorithm to Recognize Wave Heads of Fault Generated Traveling Waves
Kunming Tang · Power System Technology · 2010
Based on a lot of simulation tests,the derivation method that is used to recognize wave head of fault generated traveling wave is modified,and an improved derivation algorithm is proposed.As for common derivation methods,the difference belonging to absolute variation quantity is used to reflect the abrupt change of signals,and yet in the proposed improved algorithm the abrupt change of signals is reflected by the value of ratio belonging to relative variation quantity.The essence of abruptly changed signals can be reflected more effectively by relative variation quantity than by absolute variation quantity,and relative variation quantity is not affected by its own amplitude of the signal.The principle of the improved algorithm is simple and its calculation burden is light.Simulation results by ATP show that the proposed algorithm is correct and effective.