a symmetrical hybrid power flow controller
DESCRIPTION
A Symmetrical Hybrid Power Flow Controller . Jovan Bebic, P.Eng. Overview. VSC Basics Converter Based FACTS Devices Proposed Topology Steady - State Operation Reachable Sets and P - Curves Dynamic Control Summary Future Work. VSC Basics. STATCOM. UPFC. SSSC. - PowerPoint PPT PresentationTRANSCRIPT
October 31/2003© Copyright by J. Bebic
2003
A Symmetrical HybridPower Flow Controller
Jovan Bebic, P.Eng.
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HPFC
Overview
VSC Basics Converter Based FACTS Devices Proposed Topology Steady-State Operation Reachable Sets and P- Curves Dynamic Control Summary Future Work
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HPFC
VSC Basics
Q
PP
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HPFC
Converter Based FACTS Compensators
SSSC
SV RV
0P SI RI
Q
1V 2VSX RX
STATCOM
SV RV
0P SI RIQ
SX RXMV
UPFC
SV RV
PSI RIEQ
SX RX1V
P BQ
2V
P
Slide 5 of 15
HPFC
Proposed Topology
HPFC
SV RV
SI RI
SX RXMV
MQ
1V 2V
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HPFC HPFC
SV RV
SI RI
SX RXMV1V 2VXV YV
XP YP
MI
DCV
DCC
MB
X XmaxVV
S X maxII
Y Y maxVV
R Y maxII
1 1maxVV
2 2maxVV
M MmaxVV
X YP P
HPFC
SV RV
SI RI
SX RXMV1V 2VXV YV
XP YP
MI
DCV
DCC
MBSP 1P 2P RP
Limits and Constraints
X YP P 1 2P P S RP P
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HPFC
Equal Power Lines
S1I
S2I
SV
S S SP V I
SP constSI
RI
SV
RV
SP const
RP const
SV
RV
1V
2V
SI
RI
1 S S S
2 R R R
jX
jX
V V I
V V I
SV
RV
1V
2V
MI
SI
RI
MV
M S R
MM
MjB
I I I
IV
SV
RV
XV
YV
1V
2V
MI
SI
RI
MV
X 1 M
Y 2 M
V V V
V V V
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HPFC
Steady-State Operation
SV
RV
XV
YV
1V
2V
MI
SI
RI
MV
SV
RV
XV
YV
1V
2V
MI
SI
RI MV
SV
RV
XV
YV
1V
2V
MI
SI
RI
MV
SV
RV
YV
XV
2V
1V
MI
SI
RI
MV SV
RV
XV
YV
1V
2V
MISI
RI
MV
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Reachable Sets
S R X max X max Y max Y max
Line Parameters Equipment Limits&
X ,X V , I ; V , I
S R
Line Conditions
, ,V V
S R,I I
1 1 2, ,P Q Q
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P- Curves
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System Properties
A system of variable structure, with infinitely many internal
operating points, for every line operating point.
A nonlinear control problem
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Dynamic Control
table lookup1 1 2 Sref Rref, , ,P Q Q I I
X Y S Ruse , to control ,V V I I
Operator specifies1 1 2, ,P Q Q
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HPFC
HPFC
SV RV
SI RI
SX RXMV1V 2VXV YV
XP YP
MI
DCV
DCC
MBSP 1P 2P RP
Controlling the Power Balance of Converters
SV
RV
MI
SI
RI
MV
SI
DCvDCi
SedvSeqv
2 2x yxy
*DCv
*DCi
xy
xy
Srefi
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Summary
HPFC UPFC
Power flow control Improves first swing stability margin
Topological symmetry Able to utilize existing shunt compensation
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Future Work
Study machine based equivalents. Study dual topology. Formulate “optimality” algorithms
based on “reachable sets” algorithms.
Optimize the controller. Apply the concept of “equal power
lines” in load flow programs.