Transcript kk06 - operates plc at generator unit2009-08

Operates PLC at generator unit
Comprehends operational PLC at generator unit
Power Generation Engineering
1st Grade
2nd Semester
What is power line carrier (PLC)
Power Line Carrier adalah
One of the communication
media used in the installation of
electricity transmission by using
SUTT / SUTET as a means of
distributing the information voice,
data and teleproteksi between
GI / GITET / generator and
control center.
The weakness of the power line carrier
Main weakness of the PLC network communications
media is the allocation of very limited frequency
between 32 kHz - 600 kHz so that the number of
channels produced with the band width 300-3720 canal
is also very limited.
The weakness of the power line carrier
Media used equipment PLC
power line media is most
vulnerable to propagasi field
equipment and switch gear and
PLC terminal must be equipped
with a series of Automatic Gain
Control (AGC) and equalisation
circuits
Bandwidth PLC
Bandwidth for the voice channel using a
band width 300-2000 Hz plus signaling ±
3600 Hz and 30 Hz for data & teleproteksi
on the band 2200 - 3600 Hz
Sistem PLC
Image Block Diagram PLC
Part the PLC equipment
1. Line Trap
Blacks out signal RF ( High frequency ) to part of
equipments of power systems and continues low
frequency current to power systems .
Prevent change / decrease in signal level due
propagasi online media maneuver equipment and
switch gear
Define exactly Impedance changes to the TT line
configuration the primary switch gear (Exit
incoming PMT)
Part the PLC equipment
Reaktansi a spindle XL = 2  FL
Line trap reaktansi will have a high value of
high frequency, low akan reaktansi vice
versa if low frequency. Together Tuning unit
frequency band of PLC frequency system
is being detained (50 Hz) will be leave.
Value of main line trap coil is usually worth
0.2 mHenry up to 2 mHenry.
Installation of line trap must consider the
maximum load capability and the ability to
trap food line flow system interference.
Line trap & CVT
Part the PLC equipment
2. Coupling Capasitor Voltage Transformer ( CCTV )
Ke HV
As a link between the high voltage
side to low voltage equipment for
PLC communication media.
C1
C2
PT
PD
Ke Meter & Rele
LMU
To PLC Terminal
Part the PLC equipment
2. Coupling Capasitor Voltage Transformer ( CCTV )
As a link between the high voltage
side to low voltage equipment for
PLC communication media.
Channel function that leads to high
frequency
information
and
communication to prevent entry to
the
low
frequency
terminal
equipment and the lower-voltage
PLC into a high demand for low
voltage metering & Protection
C = 1 / 2fC
Kapasitansi
capacitor
value between 550 - 66,000
according to the PFvoltage systems work
Part the PLC equipment
3. LINE MATCHING UNIT ( LMU )
Impedance
equalize
the
channel
between the transmission equipment
with Impedance PLC
Injection & catchs signal frequency PLC
at high voltage line and passage feeder
coaksial
As the inter-media station (GI)
LMU merupakan penyesuai impedansi peralatan PLC ( 75/125/150 Ohm)
dengan impedansi media tegangan tinggi ( 400-600 Ohm )
Part the PLC equipment
Picture Thread Line Matching Unit (LMU)
Protection Device PLC
Drain Coil
Functions to channel to land or throws away to the ground current at
frequency 50 Hertz which still there is in lower part or low voltage from
clutch capacitor.
Because High frequency from terminal PLC may not thrown to the ground
by drain this coil hence, this device must have character as follows :
•
•
•
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Resistansi for DC currents must be smaller than 6 Ω.
Resistansi 50 Hz should be smaller than 15 Ω.
Resistansi at a frequency of 40 s / d 500 kHz should be greater than 5 KΩ.
Able 1 A permanent flow and flow connect short of 50 A for 0.2 second.
Protection Device PLC
Lightning Arester
For security against interference by lightning, the voltage is suddenly, the
arrester is installed with a limit of 350 V.
Picture Arester
As a security officer during maintenance.
PLC Applications
1. VOICE COMMUNICATIONS
Principle is the same as the communication network that uses radio
as the transmission antenna, frequency used 50 - 500 kHz.
Panel PLC
PLC Applications
2. TELEPROTEKSI
Teleproteksi ( Protection Signalling ) Is auxiliaries to be able to give
acceleration ( transfer of time) selectively at equipments of protection
rele distance.
Basically work principle teleproteksi this PLC is give contact received
from rele distance a watchman station of mains for distribute to rele
watchman station distance of its(the opponent mains through linear
circuit PLC.
Contacts from equipments of teleproteksi this PLC can be applied
depend on requirement of protection systems, is for intertripping
systems or blocking scheme.
Remote Terminal Unit ( RTU )
RTU Is
a device which functions to control
the operation of equipment in the switchgear
(PMT, PMS) from the remote rcc (Regional
Control Center) or JCC (Java Control Center)
and provide data to provide invormasi (&'s
metering equipment) for the rcc / JCC of all time
(on time)
Electrical Power Plant
THE END