Table 4.

Number of PMUs comparison between the proposed algorithm and previous works.

Test system	Number of PMUs
	Proposed	Reference [8]	Reference [10]	Reference [11]
WSCC	6	Not reported	Not reported	Not reported
IEEE 14-bus	8	8	8	8
IEEE 30-bus	14	17	14	14
New England IEEE 39-bus	18	Not reported	Not reported	Not reported
IEEE 68-bus	38	Not reported	Not reported	Not reported