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Stability Modeling Of Storage Devices In FACTS Applications
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VELAGAPUDI RAMAKRISHNA SIDDHARTHA ENGINEERING COLLEGEDEPARTMENT OF ELECTRICAL ELECTRONICS ENGINEERING
Accredited by NBA – Approved by AICTE - Autonomous
Stability Modeling Of Storage DevicesIn FACTS Applications
Term paper report on
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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Index
Abstract
Need for the storage devices.
Super conducting magnetic energy storage.
Steady state models.
State of operation.
Static VAR compensators.
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
Abstract
Modeling of the storage devices for better stability.
Storage devices applied in the FACTS is
» Superconducting Magnetic Energy Storage (SMES)
» Battery Energy Storage System (BESS).
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These are often considered as FACTS applications.
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
Need For Storage Devices:
Actually FACTS controllers are capable for the
improving voltage,
small signal,
Transient, stability margins of the system.
In order to improve the additional controllability , storage devices
introduced into the system.
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SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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SMES was originally proposed as a bulk of energy storage device
For electrical power systems.
power conversion is achieved by the two power electronics topologies.
the VSC and the DC –DC chopper share a common DC bus.
The coil can be configured as the solenoid that producers fairly large
fringe fields
Super conducting magnetic energy storage devices
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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Steady state models
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
Steady-state models are used in power flow and voltage stability
studies.
The models keep the desired real and reactive power injections
subject to the nominal current capability of the interface VSC
In case of series VSC, the inserted voltage must be within its nominal
magnitude capability, as well.
The desired real power injection in steady state is normally zero,
implying that no special consideration is required for the storage
devices to be within their capabilities.
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Steady state models
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
State of operation
responses are quite fast with respect to electro-mechanical
phenomena (i.e., up to a few Hz)
the power electronic equipments are generally modeled as quasi
steady-state interfaces.
augmented by dynamic control models with varying degrees of
details.
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SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
Static VAR compensators and static synchronous compensators are
static VAR generators whose output is varied , so as to maintain our
control specific maintain parameters systems of the electrical power
systems.
SVC system of thyristor controlled reactor (TCR) type is mainly
composed of filter (capacitor) branch and TCR branch, including
thyristor valves, control and protection system, cooling system,
TCR reactor and other equipments
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Static VAR Compensator
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
Description of STATCOM
There can be a little active power exchange between the STATCOM and the
EPS.
The exchange between the inverter and the AC system can be controlled
adjusting the output voltage angle from the inverter to the voltage angle of the
AC system.
This means that the inverter can not provide active power to the AC system
form the DC accumulated energy if the output voltage of the inverter goes
before the voltage of the AC system.
On the other hand, the inverter can absorb the active power of the AC system
if its voltage is delayed in respect to the AC system voltage
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SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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STATCOM
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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Dynamic Model of Super conducting Inductor
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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Dynamic Model of Battery
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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[1]Saeed Arabl, “A SMES model for comprehenswe power system stabditystudies,” EPRt Conference - The Future of Power Delivery in the 2 ls’Century, San Diego, November 18-20, 1997, TR-109806, Final Report,May 1998, pp. 4-95 to 4-109
[2]H.J Boenig, and J F. Hacrer, “Commissioning Tests of the BonnevillePower Administration 30 MJ Superconducting Magnehc Energy StorageUnit,” IEEE Trans. Power Apparatus and Systems, VOI PAS-104, no. 2,February 1985, pp 302-308
[3] Y. N. Yu, Electric Power System Dynamics. Academic Press, 1983.
References
SIVA MALA. KUPPA DEPARTMENT OF EEEVR SIDDHARTHA ENGINEERING COLLEGE ANDHRAPRADESH,INDIA
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THANKQ