The Effects of the Reverse Current Caused by the Series Compensation on the Current Differential Protection

Table 1

The phase relationships of negative sequence and zero-sequence voltage and current when AG occurred at F4.

Fault type	③		④
	Negative sequence/(°)	Zero-sequence/(°)	Negative sequence/(°)	Zero-sequence/(°)
AG (0 Ω)			−91.9	−100.1
AG (150 Ω)			91.3	102.6
AG (300 Ω)			91.3	102.6