A Fault Diagnosis Method of Power Systems Based on Gray System Theory

Figure 4

(a) The fitting curve of test sequence (0–780) using the two methods; (b) The fitting curve of test sequence (0–301) using the two methods; (c) The fitting curve of test sequence (301–500) using the two methods (Note: + indicates the test sequence using Bayesian algorithm in [12]; ○ indicates the test sequence using Gray theory algorithm).

(a)

(b)

(c)