Automatic Data logging & Energy Monitoring System of Feeder Parameters

This System is designed to automatically collect, analyze, and store 46 electrical parameters of each feeder in a substation.

The parameters which are monitored are Energy (Active, Reactive and Apparent), Power (Active, Reactive, and Apparent), Voltages, Currents, Power factor for each phase and cumulative. In addition to this, Demand and Time of Day (TOD) are also computed.

The data is collected from the feeders through a non-intrusive sensor on the CT circuit, and PT connections. The system is fully transparent to the working of the substation, and fault on either side does not affect the other system.

The data collected from each feeder is fed to a Multi-Functional Device (MFD), which computes the various parameters, and displays them on a LED display. This data is then uploaded to the Data logger for data storage and alarm condition settings.

The data logger can collect the data from 64 MFD and store all the 46 parameters in a non-volatile memory. The data is retained for more than 30 days in case of power failure or computer system failure.

The central user can download the data from the data logger in a computer for displaying it on screen tabular or graphical reports for the sub station, or for transmitting it to the central server for consolidation.

• To analyze the electrical parameters of any feeder.
  

Inputs:

Isolated signals from the Feeder Current Transformers "CT" without disconnecting the CT wires and intruding in the sub station system.
Voltage signals from the Potential Transformer of the feeder
230 Volts AC / DC auxiliary supply.

Output on MFD:

• Display of the following parameters in an LED display
  (four parameters at a time)
• Active Power (Total)
• Active Power (Each Phase)
• Reactive Power (Total)
• Reactive Power (Each Phase)
• Power Factor (Average)
• Power Factor (Each phase)
• Apparent Power (Total)
• Apparent Power (Each Phase)
• Voltage Line to Line (Average)
• Voltage (Each phase) Vry , Vyb, Vbr
• Voltage Line to Neutral (Average)
• Voltage (Each Phase) Vr, Vy , Vb
• Current (Total)
• Current (Each phase)
• Frequency
• Active Energy (Received)
• Apparent Energy (Received)
• Reactive Energy Inductive (Received)
• Reactive Energy Capacitive (Received)
• Active Energy (Delivered)
• Apparent Energy (Delivered)
• Reactive Energy Inductive (Delivered)
• Reactive Energy Capacitive (Delivered)
• Active Power (Net)
• Apparent Energy (Net)
• Reactive Energy Inductive (Net)
• Reactive Energy Capacitive (Net)
• Present Demand
• Maximum Demand
• Load Hours received
• Load Hours Delivered
• Load Hours Net

Output to Data Logger :
(via 1 pair cable for a maximum distance of 1000 meters)

• All the displayed parameters through a computer serial link.
• Date
• Real Time

Memory of MFD :

• Real Time Clock (RTC)
• EEPROM / Flash RAM for CT / PT / settings
  

Specification of MFD:

• 96 x 96 x 45 panel front mounted box, weight 300 gms.
• IP 51 protection, Humidity 5% to 95% non condensing, Protection Class III, Pollution degree 2, Clearance and creepage meets as per UL508 safety standards
• Burden on CT < 0.2 VA, Aux supply Power < 5 VA, Accuracy Class 0.2 / 0.5 / Class 1
• True RMS measurement, 4 Quadrant Power and Energy, 1 sec update time
• Auto-scaling of Kilo / Mega / Giga
• Baud rate upto 19200 bps

Data Logger and Data logger Interface

Purpose:

• To read data from 64 MFD "AT WILL"
• To decode serial data from the MFD
• Store data from all the 64 MFD in ASCII format in a non-volatile memory
• To transmit the data of the MFD to a computer "ON DEMAND"

Input :

• Serial port connecting MFD (Max 64)
• Aux. Supply of 230 VAC

Output :

• 2,54,36,160 data each day from 46 data from MFD.

Specifications :

• Data Logger can collect data from 64 MFD in sequential mode.
• Data logger talks to each meter at least once every 10 second.
• Data transfer from MFD at high speed.
• Non volatile memory to store more than 25 Million data each day
• Total storage of data for at least 30 days, or more than 750 million data storage capacity.
• Data over write in FIFO mode
• Data retention for 300 days in case of aux. supply power failure.
• Data logger is forced air cooled with over temperature alarms.
• Restarts automatically on power resumption.
• MS cabinet with protection from dust / dirt
• Error handling capability in both hardware and software.
• High speed Ethernet LAN
• 2000 Volts input isolation
• LED signals to show status
  

Computer

Purpose:

• To collect the data from the data logger and transmit it to the Central Server
• To analyze the data from the Data Logger and display in Both tabular and Graphical mode in any time frame.

Input:

• 25 Million Data from the Data Logger each day

• Transmission of data to the Central Server by Modem or any other data transmission mode like VSAT / Optical Fibre / Broadband etc.
• Display on screen the following
• Real Time status of 46 parameters for all feeders
• Mimic diagram display for all feeders
• Alarms if any preset Graphical display of single line diagram of feeders with their values
• Display on screen the following in any time frame
  (Hourly / shift-wise / daily / weekly / monthly etc.)
• Graphical display of all the 46 Electrical parameters for each feeder
• Alarm list
• Tabular comparison of user selectable data from any set of feeders (i.e. active energy in incoming feeders)
• Tabular comparison of user selectable feeders from any set of data (i.e. outgoing feeders all phase wise currents)
• Summary of user selectable parameters from any set of feeders
• Summary of consolidated user selectable feeders for any st of data
• Print any of the above reports.
  

Specifications:

• Data logger Interface
• Transmission upto 115000 bps
• Error handling capability
• Auxiliary supply 230 VAC
• LED indications on status
• D9 pin configurations
  

Computer :

• Pentium IV or AMD Athlon processor
• USB Boot provision
• 80 GB HDD
• Energy compliant monitor
• Serial ports
• Parallel port for printer
• 512 MB RAM
• Two PCI slots vacant for add on cards
• High speed Ethernet LAN
• ATX compatible mother board.

Cabling:

• Multi strand 12 SWG cable with shielding for connection of MFD to Data Logger
• Multi Strand 16 SWG cable for connection of PT to MFD
• Multi Strand 12 SGW 9 core cable from Data logger to computer
• Multi strand 12 SWG cable for connection of CT Isolator to Data logger
  

Length of cable:

• MFD to data logger - Maximum 1000 meters
• All others are 3 meters

Advantages of the EnergySys System

Non Intrusive

• The system does not touch the Sub station Current Transformer (CT) circuit to install the MFD and take signals.

• It makes sure that any fault on either side, i.e. substation or our system side does not affect each other.

• Since the CT circuit is not opened, the system can be installed even when the sub station is ON LOAD, and does not require shutdown for it.
  

• Since the data logger is installed, there is no need for the computer and other data transmission systems to be functional all the time.
• Even in case of power outage in the sub station, the last 30 days data will remain in the data logger non volatile memory for 12 months.
  

No Manpower required

• The system does not require any manpower to operate. Even in case of power outage, the system shuts down and restarts automatically without any human intervention.
• The only human intervention required is to instruct the computer to transfer the data to the central server via modem when ever required.
  

• Since the system is isolated, external disturbances do not generally affect it, and the maintenance required is negligible.
  

• The computer has a very user friendly program to give graphical or tabular outputs of the following:
• Any Feeder
• Any of the 46 Electrical Parameters
• Any time frame (hourly / shift wise / daily / weekly / monthly etc.)
• The reports can be seen on screen or printed for future reference

Advanced Analysis

• Since there will be more than 25 Million data available daily, analysis of the system in very great depth can be carried out for future reference or improvement by the user.
• With this data available in standard Database compatible format, the user can predict future faults by looking at the trends available, and take remedial actions.
• The user can send the data to the central design departments for taking corrective actions on future procurements.
  

Fault analysis

• 2944 data of the last 10 second before a fault occurs is available, and the user can pin point the exact cause of fault.
• Trends at the time of faults are available which can be plotted with similar occurrences earlier, to locate the fault.

Commercials
Item - I

• Compulsory for each sub station
• Data Logger With Software& Integration Rs
• Interface between MFD and Data logger Rs

Item - II

• For each Feeder (Max 64 )
• CT Isolator Rs.
• MFD Rs.

Item - III

• Optional for each sub station ( To be provided by user)
• Computer
• Printer
• UPS / Power quality systems
• Computer connectivity with central server
• Modem for the above
  

1. Delivery within 4-6 Weeks.
2. Installation & Commissioning 2 Weeks
3. Taxes : VAT extra
4. Warranty 1 year

Annual Maintenance will be 20% of Item-1 & Item-2