SIPCOT IT Park, Siruseri, OMR, Chennai
FEEDER REMOTE TERMINAL UNIT
  • The FRTU system will monitor all the sub-station equipments and will check all the parameters of all incoming and outgoing feeders on real- time. It also monitors the status of Circuit breakers, Relays, Isolators etc. that are prevalent in any Substations
  • The overall system needs planning, execution, forecasting,implementation and maintenance etc. Energy supply is to be balanced with the load demand continuously under normal and abnormal situations such as loss of generation, equipment failures, line faults, peak loads, load shedding etc. in order to maintain system stability, reliability and availability.
  • The application of FRTU principles leads to automatic date logging, sub-station level control, energy management, load forecasting etc. Eventually it will schedule to sub-station automation.
FEATURES
  • Automated generation of daily log sheets
  • Local HMI and WEB Based Software to control the breakers and ABS along with status Indications.
  • Live view of substations & ABS positions through CCTV.
  • Energy Accounting and Peak Load estimates of feeders / sub-stations
  • System outage / downtime feeder wise to compute the reliability indices
  • Monitoring of power transformer, oil temperature, winding temperature and OLTC position, if suitable transducers are available
  • Status of substation DC auxiliary supply
  • Energy and Frequency profile at ABT intervals as per ABT billing requirements
  • Alarm and event list, and Limit value violations
  • Compares the planned schedule with the actual power supply conditions for the rural feeder to ensure minimum guaranteed supply hours
  • It can also facilitate the concerned engineer-in-charge of the substations to view the status of their feeders and other vital parameters through web browser / mobile phone

Technologies

It has the ability to access the full capabilities of the IEDs. It reduces wiring, as most points can be retrieved through a virtual path and provides excellent transition path, allowing mix of existing hardwired points with new virtual points.

Modernization

It can facilitate to change IEDs without any substation automation hardware changes. It can also facilitate the talking of multiple energy management systems and also provides a modular and easily expandable system.

Reduced Cost

Reduces the amount of wiring needed,Reduces equipment footprint,Reduces the number of analog and digital boards required and Reduces man-hours needed in stations, and in transit to stations.

 Key Benefits
  • Automatic computation of Power Reliability Indices – SAIDI & SAIFI on a real-time basis
  • Real-time update on consumption pattern for the entire district/zone/city/state.
  • Enables feeder scheduling for Peak Demand management
  • Security control with multiple access levels
  • CCTV interface allows monitoring of unmanned Substations.
  • Local HMI with dashboard to view the critical parameters at a glance
  • Automation of substation log book

CASE STUDIES

The Tamilnadu Utility was appricaited and allowed us to Install a PoC, It is satisfactorily working last one year
FRTU MODULES
Analog Input

Acquiring analog inputs through transducers,
which would include Transformer temp., OLTC position, humidity.

Digital Input

Acquiring digital inputs of devices from the
substation, which would include breaker and relay status etc

Digital output

Receiving and processing digital commands
from LDMS and external Data / Web Server, and control the breakers.

Energy Meter 

Acquiring and computing all electrical
parameters form CT / PT inputs, with features of measuring harmonics.

Non-volatile memory

Each FRTU has sufficient non-volatile memory capacity to store all events and energy data for a period of one year.

GPRS Modem

The GPRS Modem compatible with 4G / 3G network, and  provided with high gain antenna, with minimum gain of 6dB.

GPS Time Synchronization

GPS clock for time synchronizing FRTU and LDMS system, using SNTP protocol

Local HMI

In FRTU data collection Module coming under HMI. HMI having separate service for collecting the data from FRTU Unit.

TECHNICAL SPECIFICATIONS

Input Specifications

  • System : 3Phase-4wire
  • Input voltage : 110V (Line to Line).
  • Input voltage limits : 77V to 132V (110 -30%, +20%).
  • Input current : 1A or 5A nominal- Factory configured. (request factory for correct configuration)
  • Input current limits : 10mA to 1.2A OR 50mA to 6A (0.01% to 120% of Ib)(Factory configured).
  • Input frequency : 50Hz ± 5Hz.
  • Digital Status : 110V DC from Contact Multiplier
  • Digital Output : Trip & Close of Breaker at 110V DC
  • Analog Input : Battery voltage : 110V DC (Factory configurable), Resistive
  • Input ranging 0 to 3000 Ohms

Communication interfaces

  • Isolated three wire RS232 interface. This can be used for local configuration of the unit
  • Ethernet communication for transferring the data from the unit to the HMI

Output Specifications

  • Energy parameters of 0.5% accuracy
  • Display of the Parameters in 4×20 Display with Backlight
  • Communicate to the HMI through Ethernet
  • LED pulse output for kWh and kVArh calibration.
  • LED indication of the Digital Status for each channel
  • LED indication for the Power supply

Environmental specifications

  • Normal working temperature : 0°C to 50°C.
  • Functional temperature : 0°C to 60°C.
  • Storage temperature : -10°C to 65°C.

Power supply

  • The operating voltage : 110V DC or 240V AC
  • Power consumed : Less than 10W.

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