EPS-II
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1 Date:18/06/2015 PARUL INSTITUTE OF ENGINEERING AND TECHNOLOGY B.E – Electrical Engineering ELECTRICAL POWER SYSTEMS-II SUBJECT CODE: 2160904 B.E. 6 th SEMESTER Presented by Ch.V.Sivakumar., M.Tech Asst.Proff in Electrical Dept,PIET
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power systems
Transcript of EPS-II
1Date:18/06/2015 PARUL INSTITUTE OF ENGINEERING AND TECHNOLOGY
B.E – Electrical Engineering
ELECTRICAL POWER SYSTEMS-IISUBJECT CODE: 2160904
B.E. 6th SEMESTER
Presented byCh.V.Sivakumar., M.Tech
Asst.Proff in Electrical Dept,PIET
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[ZBus] matrix building algorithmCase:1 Branch
Mutual Elements:
Self Elements:
Case: (a) if P is a Ref Bus
Case: (b) if P is a NOT a Ref BusMutual Elements:
Self Elements:
pqpqpqqq zzz
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[ZBus] matrix building algorithmCase:2 Link
Mutual Elements:
Self Elements:
Case: (a) if P is a Ref Bus
Case: (b) if P is a NOT a Ref BusMutual Elements:
Self Elements:
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[ZBus] matrix building algorithm
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[ZBus] matrix building algorithm
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Graph and a tree of the network
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Step 1: nodes p=1 and the reference node 0
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Step 2: node 2 (p = 2) and the reference node ‘0’
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Step 3: node 1 (k = 2) and node 2 (j = 1)
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Step 3: Continued...
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Step 4: node 2(p = 2) and a new node, node 3 (q = 3)
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Step 5: Node 3 (p = 3) node 4 (q = 4).
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Step 6: Node 1 (k = 1), node 4 (j = 4)
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Step 6: Continued...
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Step 6: Continued...
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Step 7: node 2 (p = 2) and node 4 (q = 4)
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Step 7: Continued...
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Step 7: Continued...
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FAULT CALCULATIONS USING Z bus
Voltages During Fault:Fault Occurs @ Bus -2 and Assume Pre Fault Voltage
220 &00.1 ZZV kkf
UP
ZZZZZZZZ
VVVV
.
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1
1
1
22
24
22
23
22
22
22
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4
3
2
1
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Faults Calculations Using Z Bus Equivalent circuits:
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Fault @ bus 4: i.e j=3 ad k=4
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SYMMETRICAL COMPONENTS
Clock wise
Anti-Clock wise
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SYMMETRICAL COMPONENTS OF USYMMETRICAL PHASORS
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SYMMETRICL Y AND DELTA CIRCUITS
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POWER IN TERMS OF SYMMETRCAL COMPONENTS
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Sequence Circuits for Synchronous Generator
Ia + Ib + Ic = 0.
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Since the synchronous generator is operated to supply only balanced voltages we can assume that Ean0 = Ean2 = 0 and Ean1 = Ean .
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Va0 = Van0 + Vn . Also we know that Vn = - 3ZnIa0 .
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Three Types of Faults
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Single-Line-to-Ground Fault
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Line-to-Line Fault
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Double- Line -to Ground Fault
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