SCADA for Power sub Stations

• Monitoring and controlling the distributing power along with the status of the controlling devices.
• Improving power quality by controlling the power factor, managing the demand and inturn improving the substation efficiency.
• Historical data for load flow analysis.

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Description:

• DIGITAL INPUTS such as Breaker status, Trip Status etc in the form of Potential free contacts are received by the RTU from the field.
• Various FEEDER ANALOG parameters are polled by the RTU from the installed meters in Feeders.
• This data is processed, time stamped and validated by the RTU before transferring to the Master Station/RCC for further process.
• This data is transferred to the Front End Processor ( FEP ) at the central control through RF communication or Coaxial cable or OFC.
• MULTIPORT FRONT END PROCESSOR (MFEP) at CENTRAL CONTROL ROOM acts as a buffer and receives the data and transfers to the control console.
• MFEP receives data from number of RTUs to facilitate Central Monitoring and Controlling.
• Control Console after processing this data, posts to the SERVER.
• SERVER receives this processed data, stores in to the database and accessed by different work stations for monitoring and controlling.
• Required number of work stations are to be connected to the SERVER through LAN switch.
• Work Stations with Mimic of Different layouts, online information of various measurements and necessary software will facilitate to execute different commands to be carried out in the field under different RTUs.
• These commands are transferred to the required RTU through the MFEP.
• Execution of these commands is carried out through the DIGITAL OUTPUT card in the RTU.
• Outputs are controlled through Select and Execute command process.
• Acknowledgement of the executed commands are passed to the central control console.

Features

Software

• Provision for preparing the mimic’s of different stations and assigning associated signals (DI’s, DO’s & Measurands) to each device.
• Providing security for editing the mimic from various caders through password facility.
• Providing security from operating the devices when they were under blocked condition.
• Providing security from operating the devices that were under power blocked condition.
• Synchronizing the time of all the RTUs with in the network with the time captured from GPS.
• Getting & Setting the RTU time of the selected station or all the stations at a time.
• Provision for checking the healthiness of network.
• Intimating the user when ever there is a link failure with in the network.
• Showing online healthiness of the station by indicating its state.
• Power Blocking facility with in the selected section.
• The details of the person responsible for power blocking, the duration of power blocking, section under power blocking are provided as an online feature.
• Showing online Feeder CB tripping indication.
• Display of online analog values.
• Display of the calculated MVA and MD values.
• Tripping the capacitor bank when the power factor falls below the configured value and closing the capacitor bank when the PF value reaches to the normal position with in the configured time.
• Generation of alarms when the analog values exceed or fall below the configured limits.
• Generation of SMS messages to the mobile of the concerned incharges, when the MD value exceeds the configured value.
• Provision for operating the CB’s such as Open, Close.
• Updating the online status of the components whenever they are being operated.
• Color change indication of the component depending on the state of the device. i.e., Green when the CB is being opened and Red when it is being closed.
• Alarm generation when the state of the DI’s of the bi-state devices changes to 00 or 11.
• Provision for changing the Tap pos of the transformer and knowing the online tap position when it is being changed.
• Provision for knowing the status of each individual DI by issuing a command.
• Various reports generation such as component status report, Max MD value on a selected day, MD graph report, current,voltage graph report, details of the operation of the components, power-blocking details report etc.
• RMMI feature. With one can know the status of the remote station through web technology.

Remote Terminal Unit:

• All out put relays will be controlled through its internal Digital Output card.
• Each DO will be operated by two relays
• Real time display on seven segment
• All D0s are indicated by LEDs on LED matrix.
• Each out put card will have different address. This gives more safety for in DO operation.
• Each output card will have a decoder, so only one DO can be operated at a time.
• Open & close status were indicated by LED indications.
• LCD & key board are also available user interface.
• Printer port to take printout of the records.
• System has a provision to connect 128 digital inputs .
• System can operate 96 digital outputs.
• 32 analog channels can be connected to the system.

Specifications

• CPU built around 32bit Processor.
• Real time clock with built in power backup with watch dog timer.
• Port for connecting local control console.
• Temperature Sensor for temp observation.
• DIP switch for RTU identity number.
• Flash Ram memory for storing parameters.
• The data will be Time stamped.
• 128 Opto isolated digital inputs
• 96 Digital Outputs.
• 2 line x 16 char LCD display.
• Seven segment display for Real time
• Numeric Key Pad for local observation.
• Buzzer for alarms
• LED indication for each input relay status.

Application Areas:

• Power Substations.
• Railways.
• Industries where power monitoring and controlling is required.