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

Table 4

Part of the test results.

Test sequences	Relay action information	Missing information	Diagnosis result	Judgment for malfunction and rejection	Diagnosis result in [11]	Diagnosis result in [12]
1	Behavior: T5s, T6s; tripping: C21, C22, C23, C24, and C25	unexisting	A3	Malfunction: A3; rejection (tripping): C21, C24, and C25	A3	A3
2	Behavior: B1m, L2Rs, L4Rs, C4; tripping: C5, C7, C9, C12, and C27	unexisting	B1	Rejection (tripping): C6	B1	B1
3	Behavior: B1m, L4Rs; tripping: C4, C7, C9, C12, and C27	L2Rs, C5	B1	Rejection (tripping): C5 and C6	B1
4	Behavior: B1, T1, T2, L1s, L2RP; tripping: C2, C3, C4, C5, C7, C9, C11, and C28	T7s, C6	L1, B1, T1, T2	Rejection (tripping): L1R, C6; malfunction: C28	L1, B1, T1, T2