Overview Emtp

7/27/2019 Overview Emtp

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Model ing Electr ical

Sys tems With EMTP-RV


2/20

EMTP-RV Package includes:

- EMTP-RV, the Engine;- EMTPWorks, the GUI;- ScopeView, the Output Processor.


3/20

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


based on


CB_ARC_a

DEV2

+

1.6nF

+

1.6nF

+

1uH

+

1uH

+

0.5

+

0.5

outin

Simplified Arc Model based on


CB_ARC_a

DEV3

outin

Simplified Arc Model based on


CB_ARC_a

DEV4

+

1.6nF

+

1uH

+

1uH

+

0.5

+

0.5

outin


based on


CB_ARC_a

DEV5

outin


based on


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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19/20

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

Overview Emtp

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