overview emtp
TRANSCRIPT
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Model ing Electr ical
Sys tems With EMTP-RV
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EMTP-RV Package includes:
- EMTP-RV, the Engine;- EMTPWorks, the GUI;- ScopeView, the Output Processor.
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EMTP-RV key features:
Reference in transients simulat ion Solut ion for large network s
Provide detai led m odel ing of the network component includ ing
control , l inear and non -l inear elements
Open archi tecture coding that al lows users custom ization andimplementat ion of soph ist icated m odels
New steady-state solut ion w i th harmon ics
New three-ph ase load-flow
Au tom atic ini t ia l izat ion from steady-state solu t ion
New capabi l i ty for solv ing detai led s em icondu ctor m odels
Simul taneous sw i tch ing opt ions for pow er electron ics
appl icat ions
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EMTP-RV Applications:
L ightn ing su rges
Switch ing surges
Temporary overvoltages
Insu lat ion co ordinat ion
Power electronic s and FACTS
General con tro l system design
Power Qual i ty issues
Capaci tor bank switch in g
Ser ies and sh unt reson ances
Ferroresonance
Motor s tar t ing
Steady-State analys is of
unb alanced sys tem
Dist r ibut ion n etwo rks and
Distr ibuted generation
Power system dyn amic and load
model ing
Subsynchronous resonance and
shaft stresses
Power system protect ion issues
EMTP-RV is suited to a wide variety of power system
studies including and not limited to:
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A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
1 1
2 2
3 3
4 4
5 5
www.emtp.com
EMTP-RV Advanced Pract ical Appl icat ions
Variable Static Load Modelingand Machine Dynamics
Wind Pow er & Multi-MachineTransient Stabil ity of L arge Network s
Arc Instabil ity behind Shun tReactor Br eaker Failures
Lightning Strike Near a 765 kV GIS
765 kV River Cross ing with theSpecial Use of Line Arr esters
SM
SM1
?m
13.8kV450MVA
Ef
Efss
Pe
Omega_1
ASM S
ASM1
6.6kV11000hp
SpeedTm
Windmill
DEV2
S ASM
DEV4
DEV6
+
+d
q
DPIM1
?m
0.25hp
Tm
Speed
Teg
Single-phase Induc tion Machine
C L
SVC_
1
Np,NqKp,Kq
Z Dist
MW,MX,PF
Va,Vb,Vc
60 Hz on l y
DEV9
Np,NqKp,Kq
MW,MX,PF
Va,Vb,Vc
60 Hz on l y
DEV10
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Simulation OptionsLoad-Flow solut ion
- The electr ica l network equat ions are solved us ing c omp lex phasors. The act ive (sourc e)
devices are only the Load-Flow devices (LF-devices). A load device is used to enter PQload con stra int equat ions.
- Only s ingle (fundamental) frequency solu t ion is achievable in th is versio n. The solut ionfrequency is specified by Default Power Frequency and used in passive network lumpedmodel calculat ions.
- The same network u sed for transient sim ulat ions can be us ed in load-f low analysis. TheEMTP Load-Flow s olut ion can w ork w ith mult iph ase and un balanced network s.
- The contro l sy stem devices are disconnected and not solv ed.
- This sim ulat ion opt ion stops and creates a so lut ion f i le (Load-Flow so lut ion data f i le). Thesolut ion f i le can be loaded for autom at ically in i t ia l izing anyone of the fol low ing solu t ionmethods.
Steady-state so lut ion
- The electr ica l network equat ions are solved using com plex num bers. This op t ion can beused in the stand-alone mode o r for in i t ia liz ing the t ime-dom ain solut ion.
- A harmon ic steady-state solut ion c an be achieved.- The contro l sy stem devices are disconnected and not solv ed.
- Some no nl inear devices are l inear ized or dis conn ected. Al l devices have a specif icsteady-state mo del
- The steady-state solut ion is performed if at least one pow er sourc e device has a start t ime(activ at ion time) low er than 0.
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Time-domain solut ion
- The electr ical network and con tro l sys tem equat ions are solved using a
num erical integrat ion techn ique.
- Al l non l inear devices are solved sim ul taneously w ith network equat ions. A
Newton method is used when non l inear devices exist .
- The solut ion c an opt ional ly star t from the steady-state solut ion for in i t ia l iz ing
the network v ar iables and achieving qu ick steady-state condi t ions in t ime-dom ain waveforms .
- The steady-state con di t ions provid e the solut ion for the t ime-point t=0. The
user can also op tionally manually init ial ize state-variables.
Frequency scan so lut ion
- This opt ion is s eparate from the two p revious op t ions. Al l sourc e frequencies
are var ied using the given frequency range and the n etwork steady-state
solut ion is found at each frequency.
Simulation Options (Cont)
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EMTPWorks features: Object -or iented design fu l ly c ompat ib le wi th Microso f t Window s
Powerful and in tui t ive inter face for creat ing sop his t icated Electr icalne tworks
Drag and d rop d evice select ion approach w ith simp le connect iv i ty
methods
Both devices and signals are objects w i th at tr ibutes. A d rawing canvas
is giv en the abi l i ty to create ob jects and cus tom ized attr ibutes Single-ph ase/three-ph ase or mixed diagrams are supported
Ad vanced features for creat ing and maintaining very large to extremely
large networks
Large num ber of subnetwork creat ion opt ion s includin g automat ic
subn etwork c reation and pin p osi t ion ing . Unl imi ted sub network nest inglevel
Opt ions for creat ing advanced su bnetwork m asks
Mult ipage design methods
Library maintenance and device updat ing method s
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Built-in Libraries:
advanced.clf Provides a set of advanced power electronic devices
Pseudo Devices.clf
Provides special devices, such as page connectors. The port devices arenormally created using the menu Option>Subcircuit>New Port Connector, they
are available in this library for advanced users.
RLC branches.clf Provides a set of RLC type power devices. .
Work.clf This is an empty library accessible to users
control.clf The list of primitive control devices.
control devices of TACS.clfThis control library is provided for transition from EMTP-V3. It imitates EMTP-V3TACS functions.
control functions.clf Various control system functions.
control of machies.clf Exciter devices for power system machines.
flip flops.clf A set of flip-flop functions for control systems.
hvdc.clfCollection of dc bridge control functions. Documentation is available in thesubcircuit.
lines.clf Transmission lines and cables.
machines.clf Rotating machines.
meters.clfVarious measurement functions, including sensors for interfacing control devicesignals with power device signals.
meters periodic.clf Meters for periodic functions.
nonlinear.clf Various nonlinear electrical devices.
options.clf EMTP Simulation options, plot functions and other data management functions.
phasors.clf Control functions for manipulating phasors.
sources.clf Power sources.
switches.clf Switching devices.
symbols.clf These are only useful drawing symbols, no pins.
transformations.clf Mathematical transformations used in control systems.
transformers.clf Power system transformers.
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Built-in Library of Examples:
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ScopeView
ScopeView is a data acqu is i t ion and s ignal processing sof tware
adapted very wel l for visual isat ion and analysis o f EMTP-RV results .
It may b e used to s imu l taneously lo ad, view and p rocess data from
appl icat ion s such as EMTP-RV, MATLAB and Com trade format f i les.
Multi-source data importation Cursor region information
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ScopeView(Cont)
Function editor of ScopeView Typical mathematical post-processing
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Typical Designs:A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
1 1
2 2
3 3
4 4
5 5
CV T
48 m 52 m
25 m
30 km 300 m 300 m
Insulation Coordinatio n of a 765 kV GIS
Netw ork 765 kV L ine
Power
Transformer588 kV Zno
To eliminate
undesirable ref lexions
Gas-Insulated Substat ionAir-Insulated Su bstat ion
Gas-fi l led
Bush ing
Open Circuit-Breaker
Gas-fi l led
Bush ingInduct ive VT 588 kV Zno
Air-Insulated Substat ion
200 kA 3/100 us
Lightning Stroke
- Backf lashover C ase
- Impulse Foot ing Resistance of the str icken
Tower may b e represented by Ri = f(I)
- Usage of ZnO model based on IEEE SPD WG
- Frequency-Dependant L ine mo del ing
+C1
+C2
+C3
+
?i
L1
+
?i
L2
+
?i
L3
+
+
48
+
+
+
+
+
+
+
52 +
4nF
+
4nF
+
4nF
+
+
+
VM+
bushing
?v/?v/?v
VM +CB_a
?v
VM +CB_b
?v
VM +CB_c
?v
VM+ ?v
Tower_top
LINE DATA
modelin: foudre_300m_ex1_rv.pun
foudre_300m_ex1.lin
+
1M
+
1M
+
1M
Simulationoptions
I/O FILES
+
+
+
TOWER1
Part=TOWER_model15_1
+ + +
TOWER2
Part=TOWER_model15_f
LIGHTNING_STROKE
TOWER3
Part=TOWER_model1ohm
LINE DATA
modelin: foudre_30km_ex2_rv.pun
foudre_30km_ex2.lin
VM +cond_c
?v
VM+
Trans_c
?v
VM+
Trans_b
?v
VM+
Trans_a
?v
+
+
+
+
0.1nF
+
0.1nF
+
0.1nF
+
?i
L10 +
?i
L11
+
?i
L12
+
735kV/_0
SOURCE_NETWORK
MPLOT
a
b
c
BUS_NET
c
b
a
c
b
a
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A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
1 1
2 2
3 3
4 4
5 5
Primary Arc : 5 kA eff
Secondary Arc : 40 A
Win d Speed: 9.7 km/h
Secondary Arc Durat ion: 1.04 sec.
315 kV insulat or strin g, l=2.3 m
Val ida tion of the Second ary Arc
M odel wi th IREQ Laboratory Tests
Field Recordin g
(10-08-1986)
EMTP-RV Simulat ion
(05-22-2005)
+100ms/200ms/0
SW1
+C2
1.60uF
+
RL1 ?i
0.7,13Ohm
+
0.2
R1
Second
aryarc
+
-
Sec_ARC_a
DEV1
+
AC1
66.4kVRMS/_0
+
300
R2
+1.05uF
C3
+
0.2
R3
I/O FILES
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A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
M
M
N
N
O
O
P
P
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
1 1
0 0
2900 mm
2xx
g= 12 mm
x= 710mm
Three-Phase 420 kV 100 MVARS Shu nt Reactor
For mu (50 Hz) = 0.06 H/m:
For mu (700 Hz) = 0.01 H/m:
Xac=Xca=9Ohms
Xba=Xbc=7OhmsXab=14Ohms
Xaa=1741Ohms
Xbb=1750Ohms
Xcc=1741Ohms
Xac=Xca=54Ohms
Xba=Xbc=42Ohms
Xab=84Ohms
Xaa=1741Ohms
Xbb=1750Ohms
Xcc=1741Ohms
20 m
65 m
L ine CVT
L i n e
F= 0.548 Wb, N= 1409 turns, L1=5.617 H
Network Substat ion 420 kV Busbar CT Doub le-b reak 420 kV SF6 C.-B . 420 kV Bus bar CVT Three-phase 420 kV Shun t-Reactor
Switch ing o f A 420 kV Three-Phase Shunt-Reactor
State of the art s imulat ion introdu cing:
- A real is t ic mod el of a three-phase shun t reactor tak in g in to account the asymetr ical coupl ings of the magn etic circuit ;
- A real ist ic c ircuit-breaker mod el based on the well-know n
Cassie - Mayr m odi f ied arc equation s.
+
1.6nF
+
1uH
+
1uH
+
0.5
+
0.5
outin
Simplified Arc Model
based on
Mayr's &Cassies equations
CB_ARC_a
DEV1
outin
Simplified Arc Model
based on
Mayr's &Cassies equations
CB_ARC_a
DEV2
+
1.6nF
+
1.6nF
+
1uH
+
1uH
+
0.5
+
0.5
outin
Simplified Arc Model based on
Mayr's &Cassies equations
CB_ARC_a
DEV3
outin
Simplified Arc Model based on
Mayr's &Cassies equations
CB_ARC_a
DEV4
+
1.6nF
+
1uH
+
1uH
+
0.5
+
0.5
outin
Simplified Arc Model
based on
Mayr's &Cassies equations
CB_ARC_a
DEV5
outin
Simplified Arc Model
based on
Mayr's &Cassies equations
CB_ARC_a
DEV6
+0.05nF
C8
+
0.05nF
C9
+0.05nF
C10
+
1.6nF
+
1.6nF
+
+C11
4nF
+
+
+C13
4nF
+
30mH
+200nF
+
10
+
R10
0.8
+
3000
+
AC1
405kVRMSLL/_-30
VM+
?v
m1
+
+
1.15nF
+
1.15nF
+
200k
+
200k
+
0.75nF
+
0.75nF
+
0.375nF
+
0.75nF
+
0.75nF
+
0.375nF
+
25uH
+
350
R12
I/OFILES
a
b
c
BUS24
a
b
c
BUS23
a
b
c
a bc
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A
A
B
B
C
C
D
D
E
E
F
F
1 1
2 2
3 3
4 4
5 5
Small Industr ial load
8 MW
Windm i l l Power Generat ion
In a weak Power System
5 x 2 M VA Doubly -fed
wi th PWM co ntro l le r
(Variable Sp eed)
8 MW
20 MW
15 MW
6.5 MW
12 x 2 MVA Doubly- fed
wi th PWM co ntro l le r
(Variable Sp eed)
Weak Local 69 kV
Networ k (150 MVA)
LL-g 6 cycles fau l t
- Realistic W ind Data;
- Realist ic DFIG Modeling;
- Realistic Netw ork & Load Models
- Realistic Harmonic Distor sions &
Dynamic Performances
11 MW
scopeP_Gr1
scopeQ_Gr1
1
2
69/6.6 YgD_1
0.1
1Ohm
VM+
?v
m1
P Qp1
scopeQ_netw
scopeP_netw
P Qp3
scopeP_Gr2
scope
Q_Gr_2
+
170uFASM
S
ASM1
?m6.6kV
5000hp
AVR
inout
AVR_SM1
1
2
69/13.8 YgD_2
+
69kV /_0
SM
13.8kV10MVA
?m
SM1
I/O FILES
DFIG_1
v
WIND1
1 2
69/0.69
YgD_3
DFIG_2
v
WIND2
+
+
+
1uF
+
0.4k
+
4
+
32Ohm
+
100
+
30
+
5nF
C3
+
5nF
C4
PQp2
+
5/5.1/0
5/5.1/0
1E15/1E15/0
?i
SW1+
1
Delay
!h
+
40nF
+
40nF
1
2
69/0.69
YgD_4
MPLOT
Np,Nq
Kp,Kq
Z Dist
MW,MX,PF
Va,Vb,Vc
50/60 Hz
VLOADg1
Np,Nq
Kp,Kq
MW,MX,PF
Va,Vb,Vc
50/60 Hz
VLOAD2
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ScopeView Multi-column &Multi-page capability