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

1. Line Trap Part the PLC equipment Main Function : 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 PT PD LMU To PLC Terminal Ke Meter & Rele C1 C2 As a link between the high voltage side to low voltage equipment for PLC communication media.

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 PF-voltage 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 )

Picture Thread Line Matching Unit (LMU) 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 : 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.

As a security officer during maintenance. 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 Created by Power Gen. Team SMK PGRI 3 Malang 2009 THE END