GETCO / E / 4S-001 / PP - 015 – 1B / R1 Dt.05.11.2011

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Automation Philosophy for 400 KV KOSAMBA Sub Station

A) Technical Details of 400/220/66KV System

1. Bus Bar Configuration

� 400kV System : Two Main Bus (1 & ½ ‘I’ type scheme) � 220kV System : Three Bus (Two Main and Transfer) � 66kV System : Two Bus (Two Main Bus)

� Isolator system

400kV System: Five isolator configuration for ½ Dia (One each for Bus & Line/ICT/Reactor and Three for Tie Bay)

220kV System: Four isolator configuration (Three Bus isolators and a Line isolator)

66kV System: Three isolator configuration (Two Bus isolators and a Line isolator)

2. Control Voltage

� 220V DC

3. Equipments

� Circuit Breakers - SF6 � C & R panel - Control & Protection panel (mounted in Yard

Kiosk) with IEC 61850 compatible BCU & Protective relays for 400 KV & 220 KV bays while with BCPU for 66 kV Bays

� PLCC Panels - Conventional PLCC panels and IEC 61850 compatible PLCC BCU panel (mounted in PLCC Room).

� Isolator - Motorized � Instrument Transformers - Conventional � Battery Chargers - SCADA Compatible (Existing) � LT Panel Board - SCADA Compatible (Existing) � Transformer RTCC Panels - SCADA Compatible � Energy Meters - Conventional with Mod bus Protocol

4. Nos. of Bays

a) 400KV Switchyard

� Line W/o Reactor Bay – 1 Nos. � ICT Bay – 1 No. � Bus Reactor Bay – 1 No. � Tie Bay – 3 Nos. � Bays connected to Bus Bar Protection in first phase - 11 Nos. � Bays to be connected to Bus Bar Protection - 6 Nos. � Future bays – 13 Nos. � Total bays in the Sub Station will be - 30 � Bus Bar Protection

o Control Unit - 24 Bays (Siemens make 7SS52) o Bay Units - 6 Nos. + 1 No. Spare (Siemens make 7SS523)

b) 220 KV Switchyard

� Feeder Bay – 2Nos. � ICT LV (400/220KV) Bay – 1 No. � Transformer HV (220/66KV) Bay – 2 Nos.

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� Bays connected to Bus Bar Protection in first phase - 13 � Bays to be connected to Bus Bar Protection - 5 Nos. � Future bays – 1 Nos � Total bays in the Sub Station will be – 19 Nos. � Bus Bar Protection

o Control Unit - 24 Bays (Siemens make 7SS52) o Bay Units - 5 Nos.

c) 66 KV Switchyard

� Feeder Bay – 5 Nos. � Transformer LV (220/66KV) Bays – 2 No. � Transformer HV (66/11KV) Bay – 1 No. � Bus Coupler Bay – 1 No. � Bays to be connected in first phase - 9 � Future bays - 3 � Total bays in the Sub Station will be - 12

B) Main Substation (Master Control Centre)

� At present 400KV Kosamba is being controlled locally.

C) Automation (Integration of Bays under scope of this tender with existing SCADA system - Siemens make SICAM PAS)

� 400 KV System – Bay wise Bay Control Unit i.e. BCU and IEC 61850 compatible protective relays (IEDs) for protection as per protection philosophy. 9

� 220 KV System – Bay wise Bay Control Unit i.e. BCU and IEC 61850 compatible protective relays (IEDs) for protection as per protection philosophy.

� 66 KV System - Bay wise IEC 61850 compatible Bay Control & Protective relays (IEDs) i.e. BCPU for protection, control and monitoring as per protection philosophy.

� PLCC BCU Panel for 400 KV & 220 KV system. This panel will be connected to PLCC panels through hardwiring and to respective Control & protection panel through soft wire i.e. through GOOSE messaging.

� Existing IEC 61850 compatible RTU having sufficient I/Os for station auxiliaries. � Hard wiring of Instrument transformers’ secondary to respective IEDs for Analogue

inputs. � Hard wiring of switchyard equipments for Status and Command contacts to BCPU

for 66 KV system while to BCU for 400 KV & 220 KV System. � Energy meters with Mod bus protocol shall be connected to FO network by using

appropriate converter so as metering data shall be available to the dedicated computer (DAS metering PC) and also to station HMI installed in the SCADA control room & in Master Control Centre (i.e. availability in Gateway).

� Connection of all IEDs to Ethernet switches in star topology (Kiosk wise separate switch).

� Gateways, DAS Computer, Station auxiliary BCU/RTU and other peripherals are connected to separate Ethernet switch.

� All switches shall be looped to form a ring via F.O. cable to have ring substation topology.

� Separate F.O. network between Bus Bar Central unit and Peripheral unit. � IEC 61850 compatible intelligent Ethernet switches. � Ethernet base 100Mbps LAN. � All interlocks through GOOSE messages by forming logics in IEDs. � Remote Data transmission through GATEWAY which is supporting IEC 61850 and

convert data to IEC60870-101 protocol for remote control and monitoring. � RTU Data transmission through GATEWAY which is supporting IEC 61850 and

convert data to IEC60870-101 protocol to match our existing RTU main system

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installed at SLDC-Gotri. (Integration of sub station data at SLDC i.e. Database modification at SLDC will be done by GETCO, only coordination for data communication with SLDC by the contractor)

� Substation is controlled locally having Redundant HMI for Control & Monitoring and one DR workstation along with printers in Control Room.

D) Protection

Protection shall be as per Protection Philosophy given separately.