AREP - Vert Energy Group

ALTERNATOR DIVISION
AREP + PMI
DESCRIPTION & COMPARISON
DESCRIPTION et COMPARATIF
SYSTEME EXCITATION AREP
O AREP - PERFORMANCE
O
Le système AREP de Leroy Somer est un
système performant, simple et moderne:
O
capacité de court circuit en standard
capacité de fonctionner sur tout type de charge
déformante grâce au système d ’alimentation
du régulateur par bobinages auxiliaires
système simple sans aucun système
complémentaire dans la boite à bornes
(booster) ou à l ’arrière de l ’alternateur (PMG)
Très grande fiabilité
O
Le système AREP est étendu sur toute la
gamme de 15kVA à 15MVA et de 220V à
11kV
Our end-users expect some basic
requirements from their generating set :
• High motor starting and short circuit capability.
• Selective protection against short circuit.
• Capacity to operate with any type of load
including heavy SCR, UPS or VFD.
• Simple with no need of extra component
• High component reliability.
O
The AREP excitation system is standard from
15 KVA up to 15 MVA and from 220 V to
11kV.
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O AREP - PERFORMANCE
3
O AREP - DESCRIPTION
O
O
O
O
O
L ’AREP est un système d ’excitation sans
bague ni balai
La régulation électronique est alimentée,
indépendamment du circuit de détection de
tension, par deux bobinages auxiliaires
insérés dans le bobinage principal du stator.
L ’énergie fournie par le premier bobinage est
proportionnelle à la tension de sortie
alternateur (ie Shunt)
L ’énergie fournie par le second bobinage est
proportionnelle au courant stator (ie Booster)
De plus, un aimant permanent est logé dans
l’excitateur pour sécuriser l’auto-amorçage.
O
O
O
O
AREP + PMI is a brushless self excited
excitation system.
The electronic regulation is powered
independently from the voltage detection
circuit by two auxiliary windings located in the
main stator slots. The voltage across the first
winding is proportional to that of the alternator
(shunt characteristic). The voltage across the
second is proportional to the stator current
(series characteristic : Booster effect).
In addition, a permanent magnet is located in
the exciter field core to secure voltage build
up.
The end result is a compound characteristic,
more suitable to all applications.
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O PMI - PRINCIPLE
O
O
O
O
O
PMI signifie « Permanent Magnet Insert »
des aimants permanents sont inclus dans
l ’inducteur, permettant l ’amorçage dans tous
les cas, y compris après un stockage prolongé
de l ’alternateur
Le système AREP + PMI répond donc
parfaitement aux besoins du client, sans option
particulière.
La PMI intégrée en standard enlève toute
justification à la PMG
Le système d ’excitation AREP est compatible
avec tous les régulateurs Leroy Somer
O
In addition, a PMI, ie “Permanent Magnet
Insert” is located in the core of the exciter
field to secure voltage build up.
O
The end result is a compound characteristic,
more suitable to all applications.
O
The standard implementation of PMI remove
any interest for PMG.
O
The AREP + PMI excitation system is
compatible with all Leroy Somer AVRs (R400
and R600 families).
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O AREP - SHORT CIRCUIT CAPABILITY
O
O
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Le système d ’excitation AREP + PMI permet
de maintenir un courant de court circuit de 3x
In (courant nominal) pendant 10 secondes,
avec 2 avantages par rapport au système
Shunt:
démarrage moteur jusqu ’à 2,5 fois le courant
nominal avec une chute de tension de 20%
Le système de protection peut détecter des
conditions de défaut sans perturber les autres
charges alimentées par l ’alternateur.
O
The AREP + PMI excitation enables short
circuit current 3x rated current, sustained
during 10 seconds, giving 2 advantages
versus a shunt system :
O
Motor starting up to 2,5 times the rated
current for a 20 % voltage dip.
MOTOR STARTING CAPACITY
O
A sectional circuit breaker can be tripped
under fault conditions, without disturbing
adjacent loads powered by the alternator.
EFFICIENT SELECTIVE PROTECTION
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O AREP – with Low Voltage stator winding
Main stator
winding
Auxiliary
winding
Stator
core
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O AREP – with MV & HV stator winding
Auxiliary windings
inserted into main
stator slots
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O AREP - PRINCIPLE DRAWING
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O PMG - PRINCIPLE DRAWING
PMG
INDUCTEUR
DIODES
BOBINAGE
STATOR
INDUIT
BOBINAGE
ROTOR
A.C.
D.C.
REGULATEUR DE
TENSION
ELECTRONIQUE
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O PMG – EXCITATION SYSTEM
DISADVANTAGES
€
ADDED COST
ADVANTAGES
EXTRA
LENGTH
Maximum
rotating
parts
Complete
Exciter
field fully
system
No upgrade controlled
required
by AVR
Short
circuit
capability
Overload
capability
Intrinsic
build up
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O AREP – EXCITATION SYSTEM
DISADVANTAGE
ADVANTAGES
SPECIAL
Specific
winding
Minimum Complete
Exciter
rotating
field fully
system
parts
No upgrade controlled
required
by AVR
Short
circuit
capability
Overload
capability
Intrinsic
build up
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O AREP – PMG - COMPARISON
Characteristics
AREP
Motor starting capability
High
Short circuit capability
300%
Susceptibility to non linear loads
Minimum
Compactness
Yes
Extra components
No
Price
Included
Voltage build up
Yes
Possibility of accessory mounting on NDE
Yes
CACA configuration
Self ventilation
PMG
=
=
=
+
+
+
=
+
+
=
=
=
=
-
+
-
High
300%
Minimum
No
Yes
Extra cost
Yes
No
Forced ventilation
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O AREP - ADVANTAGES
O
O
O
O
O
O
Système complet et compact
Système simple et fiable
Minimum de pièces tournantes
Capacité de surcharge
Capacité de courant de court circuit
Amorçage intrinsèque
O
These features insure compliance with
customer requirements while offering a
compact and efficient machine.
LIMITED
MACHINE
O
COMPONENTS,
COMPACT
The AREP + PMI system is the simplest
system on the market with
maximum
reliability (30 years experience using auxiliary
windings).
SIMPLICITY AND RELIABILITY
O
Permanent magnet fitted inside the exciter
field between the poles, in order to ensure a
fail safe build-up whatever the conditions and
length of non-operation periods.
FAIL SAFE
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O CONCLUSION
AREP + PMI = A QUALIFIED SYSTEM TO MEET
CUSTOMER REQUIREMENTS
→ PERFORMANCE
→ SIMPLICITY
→ COMPACTNESS
→ LIMITED COMPONENTS
→ RELIABILITY
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