51 charanka protection philosophy

7/28/2019 51 Charanka Protection Philosophy

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Control & Relay Protection Philosophy for 400KV CHARANKA Sub Station

A) Bus Bar Configuration 400kV System : Three Bus (Two Main and One Transfer Bus) 220kV System : Three Bus (Two Main and One Transfer Bus) 66kV System : Two Bus (Two Main Bus)

Isolator system400kV System : Four isolator configuration (Three Bus isolators and a Line isolator)220kV System : Four isolator configuration (Three Bus isolators and a Line isolator)66kV System : Three isolator configuration (Two Bus isolators and a Line isolator)

B) Control Voltage

220V DC

C) Control & Relay panels

Control & protection Panels to be mounted in Yard Kiosk

D) PLCC panels / Communication Panels

Communication with opposite 220 & 400 KV sub station will be through OPGW. Hencethere is no any PLCC panels

FOTE (Fibre Optic Terminal Equipment) Panels to be mounted in Control Room Protection Coupler BCU panel to be mounted in Control Room for interface between

Control & protection Panels and Protection Couplers, through GOOSE commands

E) Nos. of Bays & Bus Bar Protection

400 KV System

Feeder Bay 2 Nos. ICT Bay 2 Nos.

Bus coupler Bay - 1 No. Transfer Bus Coupler Bay - 1 No. Bus Reactor Bay - 1 No. Bays to be connected to Bus Bar Protection in first phase - 7 Nos. Future bays - 0 Total bays in the Sub Station will be - 7 Nos. Bus Bar Protection

o Control Unit - 24 Bayso Bay Units - 7 Nos. + 1 No. Spare

220 KV System

Feeder Bay 2 Nos. ICT Bay 2 Nos. Transformer Bay - 8 Nos. Bus coupler Bay - 1 No. Transfer Bus Coupler Bay - 1 No. Bays to be connected to Bus Bar Protection in first phase - 14 Nos. Future bays - 0 Total bays in the Sub Station will be - 14 Nos. Bus Bar Protection

o Control Unit - 24 Bayso Bay Units - 14 Nos. + 1 No. Spare


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66 KV System

Feeder Bay 35 Nos. Transformer Bays 8 No. Bus Coupler Bays 3 Nos. Bus Sectionalizer Bays 4 nos.

Bays to be connected in first phase - 50 Future bays - 0 Total bays in the Sub Station will be - 50

Control Philosophy CHARANKA Sub Station

System Controlling Device to be Adopted Type of Controlling Device

400 KV Bay Bay Control Unit BCU with IEC 61850 Protocol

220 KV Bay Bay Control Unit BCU with IEC 61850 Protocol

66 KV Bay Bay Control & Protection Unit BCPU with IEC 61850 Protocol

PROTECTION PHILOSOPHY CHARANKA Sub Station

A) Transmission Lines Protection

Line Protection Adopted Type of Relay

1 Two Distance Protection[shall be of two different make (i.e.

from different manufacturers) or ofsame make with two differentplatforms with same specifications]-Main-I Protection &-Main II Protection

Numerical Relays with IEC61850 Protocol

2 Two Stage Over Voltage Protection- Stage I- Stage II

- Static Relay- Integrated in Main I &

Main II Protection

400 KV Lines

3 Local Breaker Backup (LBB) Protn. Integrated in Main I Protectionand Bus Bar protection

1 Two Distance Protection

[shall be of two different make (i.e.from different manufacturers) or ofsame make with two differentplatforms with same specifications]-Main-I Protection &-Main II Protection

Numerical Relays with IEC

61850 Protocol

2 Two Stage Over Voltage Protection- Stage I- Stage II

Integrated in Main I & Main IIProtection.

220 KV Lines

3 Local Breaker Backup (LBB)Protection.

Integrated in Main I Protectionand Bus Bar protection


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1 Directional O/C & E/F Protection Integrated in Bay Control &Protection Unit (BCPU) with IEC61850 Protocol

66 KV Lines

2 Local Breaker Backup (LBB)Protection.

Integrated in BCPU

B) Power Transformer Protection

Equipment Protection Adopted Type of Relay1 Differential Protection Numerical Relay with IEC61850 Protocol

2 Restricted Earth Fault Protection Numerical Relays with IEC61850 Protocol

3 Directional O/C & E/F Protection(on HV & LV side)


4 Over Fluxing Protection- 400KV side

- 220KV side

-Integrated in DifferentialProtection

- Separate static relay

5 Local Breaker Backup (LBB) Protn.- 400 KV side

- 220 KV side

-Integrated in DifferentialProtection and Bus Barprotection

-Integrated in Dir. O/C & E/FProtection & Busbar protection

6 Buchholz Relay Integrated in Transformer,

7 Pressure Relief Device Integrated in Transformer

8 Oil & Wdg Temp. Alarm & Tripping Integrated in Transformer

9 OLTC Oil Surge Relay Integrated in Transformer

400/220 KV Transformer

10 Oil Level Low Alarm Integrated in Transformer

1 Reactor Differential Protection Numerical Relay with IEC61850 Protocol

2 Restricted Earth Fault Protection Numerical Relays with IEC61850 Protocol

3 Backup impedance protection Numerical Relays with IEC61850 Protocol

4 Buchholz Relay Integrated in Reactor

5 Pressure Relief Device Integrated in Reactor

6 Oil & Wdg Temp. Alarm & Tripping Integrated in Reactor

400 KV Bus reactor

7 Oil Level Low Alarm Integrated in Reactor

1 Differential Protection Numerical Relay with IEC

61850 Protocol2 Restricted Earth Fault Protection

(on HV & LV side)Numerical Relays with IEC61850 Protocol

3 Directional O/C & E/F Protection(HV side)


4 Directional O/C & E/F Protection (LVside)

Integrated in Bay Control &Protection Unit (BCPU) with IEC61850 Protocol

220/66KV Transformer

5 Over Fluxing Protection Integrated in DifferentialProtection


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6 Local Breaker Backup (LBB) Protn.- 220 KV side

- 66 KV side

-Integrated in DifferentialProtection and Bus Barprotection

- Integrated in BCPU

7 Buchholz Relay Integrated in Transformer

8 Pressure Relief Device Integrated in Transformer

9 Oil & Wdg Temp. Alarm & Tripping Integrated in Transformer

10 OLTC Oil Surge Relay Integrated in Transformer

11 Oil Level Low Alarm Integrated in Transformer

C) Bus Coupler Protection

400 KVBus coupler

1 Non Directional O/C & E/FProtection

Numerical Relay with IEC61850 Protocol

2 Local Breaker Backup (LBB) Protn. Integrated in Non Dir. O/C &E/F Protection and Bus Barprotection.

1 Non Directional O/C & E/F

Protection

Numerical Relay with IEC

61850 Protocol

220 KV

Bus coupler2 Local Breaker Backup (LBB) Protn. Integrated in Non Dir. O/C &

E/F Protection and Bus Barprotection.


Integrated in Bay Control &Protection Unit (BCPU) withIEC 61850 Protocol

66KV Bus Coupler

2 Local Breaker Backup (LBB) Protn. Integrated in BCPU


Integrated in Bay Control &Protection Unit (BCPU) withIEC 61850 Protocol

66KV Bus Sectionalizer

2 Local Breaker Backup (LBB) Protn. Integrated in BCPU

D) Bus Bar Protection

400 KV Bus bar 1 Bus Differential Protection(Single scheme)7 Bays, Extendable upto 24 Bays(i. e. Control Unit - 24 Bays)


220 KV Bus bar 1 Bus Differential Protection(Single scheme)14 Bays, Extendable upto 24 Bays(i. e. Control Unit - 24 Bays)


E) Disturbance Recorder & Event Loggers

Integrated feature of protective relays is used to provide the information about the Disturbance andto log the events.

F) GPS based Time Synchronizing Equipment

The Sub station is to be provided with Global Positioning System based Time SynchronizingEquipment to synchronize all the protections.

51 charanka protection philosophy

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