The Relay Protection of High Voltage Networks |
Contents
SYNTHESIS AND APPLICATION OF SEQUENCE NETWORKS | 11 |
THE INVESTIGATION OF TRANSMISSION OPERATING | 41 |
varies at the point of fault | 79 |
Copyright | |
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Common terms and phrases
angle asymmetrical fault bus-bars calculation capacitive circle diagrams circular characteristic coefficient complex plane current and voltage current circuits current filters current transformers cut-off delta connection differential protection directional distance relay distance protection equation equivalent network expression faulty phase four-terminal network impedance plane incorrect operation induction interphase magnitude method negative and zero negative sequence current obtained ohm relay parallel lines parameters phase voltages point of short-circuit positive sequence power directional device power directional relay presence of swings presence of two-phase protected zone protective gear reactance relay is installed relay operating relay protection scheme of Fig sequence impedance sequence networks series capacitive shown in Fig shunt single-phase short-circuit single-system starting device switching symmetrical components three-phase short-circuit torque transient processes transmission line transmitter tripping two-phase earth faults two-phase short-circuits unbalance values vector vector diagram voltage and current voltage circuits voltage filter Z₁ zero sequence current