280 likes | 525 Views
PRACTICAL METHOD FOR ANALYSIS OF GROUND FAULT CURRENT DISTRIBUTION ON GROUNDING SYSTEM OF LARGE HV SUBSTATIONS I. Among outgoing lines there is no any one of double circuit parallel lines. Ljubivoje M. Popović. GROUND FAULT CURRENT COMPONENTS IN THE CASE OF FAULT INSIDE THE STATION.
E N D
PRACTICAL METHOD FOR ANALYSIS OF GROUND FAULT CURRENT DISTRIBUTION ON GROUNDING SYSTEM OF LARGE HV SUBSTATIONSI. Among outgoing lines there is no any one of double circuit parallel lines Ljubivoje M. Popović
GROUND FAULT CURRENT COMPONENTS IN THE CASE OF FAULT INSIDE THE STATION
GROUND FAULT CURRENT COMPONENTS IN THE CASE OF FAULT AT AN LINE TOWER IN THE VICINITY OF THE STATION
EQUIVALENT CIRCUIT OF AN OVERHEAD LINE UNDER GROUND FAULT CONDITIONS
THEORETICAL BECKGROUND OF THE METHOD1. METHOD OF SIMETRICAL COMPONENTS2. EQUIVALENT VOLTAGE SOURCE AT THE FAULT PLACE, OR THEVENEN GENERATOR 3. DECOUPLING TECHNIQUE, SEPARATE CONSIDERATION OF CURRENTS APPEARING AS A CONSEQUENCE OF INDUCTIVE CONNECTIONS AND CURRENTS APPEARING AS A CONSEQUENCE OF CONDUCTIVE CONNECTIONS 4. GENERAL EQUATIONS OF THE UNIFORME LADER CIRCUITS
GENERAL EQUATIONS OF THE UNIFORM LUMPED PARAMETRS LADER CIRCUITS
CONDENSED UNIFORM LADER CIRQUIT TO AN EQUIVALENTπ – TYPE CIRCUIT
CONDENSED EQUIVALENT CIRCUIT FOR THE GROUND FAULT ANYWHERE ALONG THE LINE
ANALYTICAL EXPRESSIONS FOR EQUIVALENT CURRENT SOURCESAND LINE REDUCTION FACTOR
SIMPLIFIED CONDENSED EQUIVALENT CIRCUIT Z0A << Z0B Za≈ 0 Zb ≈ 0
GROUNDING IMPEDANCE AT A FAULT PLACE where: Under the condition: . . . Qb ≈i Pb ≈ Z∞
THE EXAMPLES OF THE SOLVING PRESENTED TRANSCENDENTAL EQUATION
EQUIVALENT CIRCUIT FOR DETERMINATION OF THE POTENTIAL AT A FAULTED TOWER
ANALYTICAL EXPRESSIONS FOR POTENTIAL AT A FAULTED TRANSMISSION LINE TOWER
GROUNDING IMPEDANCE AS A FUNCTION OF THE FAULT PLACE; STEEL G. WIRE
GROUNDING IMPEDANCE AS A FUNCTION OF THE FAULT PLACE; STEEL G. WIRE
GROUNDING IMPEDANCE AS A FUNCTION OF THE FAULT PLACE; ACSR G. WIRE
GROUNDING IMPEDANCE AS A FUNCTION OF THE FAULT PLACE; ACSR G. WIRE
CURRENT PASSING THROUGH THE EARTH AS A FUNCTION OF THE FAULT PLACE ALONG THE LINES OF THE LENGTH OF 7.5 km
CURRENT PASSING THROUGH THE EARTH AS A FUNCTION OF THE LINES LENGTH