Single Line Diagram for Generator and Gen. Protection & Metering (660 Mw)

PRESENTATION

SINGLE LINE DIAGRAM FOR GENERATOR AND GEN. PROTECTION & METERING TIRORA COAL – FIRED POWER PLANT PROJECT (5 X 660 MW)

BTG - ELECTRICAL SLD FOR GENERATOR AND GEN. PROTECTION & METERING:TO GT & UT 22 KV IPBD TA9:400 / 5A 5P20 60VA

GPP - A

TA10:400 / 5A 5P20 60VA TA11:400 / 5A 0.5 30VA

TA8:25000 / 5A 5P40 60VA

IPBD

TA7:25000 / 5A 5P40 60VA

GPP - B

GTP DC ENB

PT / LA CABINET

TA6:25000 / 5A 0.2 100VA TA5:25000 / 5A 0.2 100VA

GPP - A GPP - B GTP & AVR AVR

+ AVR

ET

GEN

GPP – B, GTP & AVR

TA12:7500 / 5A 5P20 60VA

CABLE

GPP – A, GEMP GPP – B - GFR

GPP - A

-

TA13:7500 / 5A 5P20 60VA

GPP - B GPP - A SPARE

TA14:7500 / 5A 0.5 30VA

TA4:25000 / 5A 0.2S 100VA

GEMP

TA3:25000 / 5A 5P40 60VA

GPP - B

TA2:25000 / 5A 5P40 60VA

GPP - A

TA1:25000 / 5A 5P40 60VA

AC ENB

TO GEN. & UT PROT. PANEL USING FOR OVERALL DIFFERENTIAL PROTECTION

GTP TO GEN. SHAFT

GPP – A GPP – B

GPP – A, GPP – B - GFR

N.G.T.

415 V MCC TA0: 5 / 5A 0.5 30VA

GFR

EARTHING

2

BTG - ELECTRICAL SLD FOR GENERATOR AND GEN. PROTECTION & METERING:-

CT DETAILS FOR GENERATOR PROTECTION & METERING SR.NO.

CT CODE

CT DESCRIPTION

1

TA0

5 / 5A, 0.5, 30VA

2

TA1

25000 / 5A, 5P40, 60VA

PANEL

USES

QTY

GENERATOR FAULT RECORDER

USING FOR RECORD

1

TO GEN. & UT PROT. PANEL

USING FOR OVERALL DIFFERENTIAL PROTECTION

3

GEN. DIFFERENTIAL (87G1 ) Id / I THERMAL OVERLOAD (49G1) I> m=3

STARTUP / SHUTDOWN (59G1) I> 3

TA2

25000 / 5A, 5P40, 60VA

GENERATOR PROTECTION PANEL- A

NEGATIVE PHASE SEQUENCE OVERCURRENT (46G1) I> m≠ 3

3

VOLTAGE RESTRAINED OVERCURRENT (51VG1) U BACK-UP IMPEDANCE (21G1) Z< GEN. DIFFERENTIAL (87G2 ) Id / I THERMAL OVERLOAD (49G2) I> m=3 STARTUP / SHUTDOWN (59G2) I> 4

TA3

25000 / 5A, 5P40, 60VA

GENERATOR PROTECTION PANEL- B

NEGATIVE PHASE SEQUENCE OVERCURRENT (46G2) I> m≠ 3

3

VOLTAGE RESTRAINED OVERCURRENT (51VG2) U BACK-UP IMPEDANCE (21G2) Z<

3

BTG - ELECTRICAL SLD FOR GENERATOR AND GEN. PROTECTION & METERING:-

CT DETAILS FOR GENERATOR PROTECTION & METERING SR.NO.

CT CODE

CT DESCRIPTION

PANEL

USES

QTY

5

TA4

25000 / 5A, 0.2S, 100VA

ENERGY METER PANEL

USING FOR METERING (MAIN METER & BACKUP METER)

3

6

TA5

25000 / 5A, 0.2 100VA

EXCITATION CONTROL PANEL (AVR)

USING FOR EXCITATION SYSTEM

3

7

TA6

25000 / 5A, 0.2 100VA

GENERATOR TRANSDUCER PANEL & AVR

USING FOR CONVERT 4 - 20mA FOR DCS & EXCITATION SYSTEM

3

GEN. DIFFERENTIAL (87G2 ) Id / I LOSS OF EXCITATION (40G2) Ф< LOSS OF STEP (68/78 G2) dz/dt> 8

TA7

25000 / 5A, 5P40, 60VA

GENERATOR PROTECTION PANEL- B

3

REVERSE POWER (32G2) _P GENERATOR BACK - ENERGIZATION (50 / 27 G2) I> U> LOW FORWARD POWER (37 G2) P< GEN. DIFFERENTIAL (87G1 ) Id / I LOSS OF EXCITATION (40G1) Ф< LOSS OF STEP (68/78 G1) dz/dt>

9

TA8

25000 / 5A, 5P40, 60VA

GENERATOR PROTECTION PANEL- A

3

REVERSE POWER (32G1) _P GENERATOR BACK - ENERGIZATION (50 / 27 G1) I> U> LOW FORWARD POWER (37 G1) P<

4

BTG - ELECTRICAL SLD FOR GENERATOR AND GEN. PROTECTION & METERING:-

CT DETAILS FOR GENERATOR PROTECTION & METERING SR.NO.

10

CT CODE

TA9

CT DESCRIPTION

400 / 5A, 5P20, 60 VA

PANEL

GENERATOR PROTECTION PANEL- A

USES EXCITATION TRANSFORMER INSTANTANEOUS OVERCURRENT (50SET1) Is>

QTY

3

EXCITATION TRANSFORMER OVERCURRENT (51ET1) I>

GENERATOR PROTECTION PANEL- B 11

TA10

400 / 5A, 5P20, 60 VA

EXCITATION TRANSFORMER INSTANTANEOUS OVERCURRENT (50SET2) Is> EXCITATION TRANSFORMER OVERCURRENT (51ET2) I>

GENERATOR FAULT RECORDER

USING FOR RECORD

3

12

TA11

400 / 5A, 0.2, 30 VA

GENERATOR TRANSDUCER PANEL & AVR

USING FOR CONVERT 4 - 20mA FOR DCS & EXCITATION SYSTEM

3

13

TA12

7500 / 5A, 5P20, 60 VA

GENERATOR PROTECTION PANEL- B

EXCITATION TRANSFORMER THERMAL OVERLOAD (49ET2) 3I>

3

14

TA13

7500 / 5A, 5P20, 60 VA

GENERATOR PROTECTION PANEL- A

EXCITATION TRANSFORMER THERMAL OVERLOAD (49ET1) 3I>

3

15

TA14

7500 / 5A, 0.5, 30 VA

SPARE

3

5

BTG - ELECTRICAL DETAILS OF GENERATOR :-

PURCHASER

SICHUAN MECHANICAL EQUIPMENT IMPORT – EXPORT CO. LTD. (SCMEC)

BARGAINOR

SHANGHAI ELECTRIC POWER GENERATION CO. LTD. GENERATOR PLANT

DESIGN UNIT

SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE (SWEPDI)

6

BTG - ELECTRICAL DETAILS OF GENERATOR :DESCRIPTION

UNIT

DESIGN VALUE

SPECS AND MODE GENERATOR MODEL

QFSN-660-2

RATED CAPACITY SN

MVA

776

RATED POWER PN

MW

660

RATED POWER FACTOR COSΦN

0.85 (LAG)

RATED VOLTAGE UN

KV

22

RATED CURRENT IN

A

20377

RATED FREQUENCY FN

HZ

50

RATED ROTATION SPEED NN

RPM

3000

RATED EXCITATION VOLTAGE UFN

V

494

RATED EXCITATION CURRENT IFN/ NOLOAD EXCITATION CURRENT IFOZ

A

4690/1497

STATOR WINDING CONNECTION MODE

YY

COOLING MODE

WATER, H2, H2

VENTILATION MODE

TAKE GAS FROM THE AIR GAP

EXCITATION MODE

STATIC EXCITATION

7

BTG - ELECTRICAL DETAILS OF GENERATOR :DESCRIPTION

UNIT

DESIGN VALUE

PARAMETER PROPERTY DC RESISTANCE FOR EACH PHASE OF THE STATOR （75℃）

W

1.447×10

DC RESISTANCE FOR WINDING OF THE ROTOR （75℃）

W

0.1004

A

ΜF

0.229

B

ΜF

0.229

C

ΜF

0.229

SELF INDUCTANCE OF THE ROTOR WINDING

H

0.762

DIRECT AXIS SYNCHRO REACTANCE XD

%

226

HORIZONTAL AXIS SYNCHRO REACTANCE XQ

%

220

DIRECT AXIS TRANSIENT VALUE) X'DU

(NON-SATURATED

%

31.3

DIRECT AXIS TRANSIENT REACTANCE (SATURATED VALUE)X'D

%

27.5

HORIZONTAL AXIS TRANSIENT REACTANCE (NON-SATURATED VALUE) X'QU

%

46

HORIZONTAL AXIS TRANSIENT REACTANCE (SATURATED VALUE)X'Q

%

40.5

-3

GROUND CAPACITANCE FOR EACH PHASE OF THE STATOR

REACTANCE

8

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

PARAMETER PROPERTY DIRECT AXIS SUPER-TRANSIENT REACTANCE (NON-SATURATED VALUE) X"DU

%

23.2

DIRECT AXIS VALUE)X"D

%

21.4

(NON-

%

22.8

HORIZONTAL AXIS SUPER-TRANSIENT REACTANCE (SATURATED VALUE) X"Q

%

20.9

NEGATIVE SEQUENCE REACTANCE (NON-SATURATED VALUE) X2U

%

23

NEGATIVE SEQUENCE REACTANCE (SATURATED VALUE) X2

%

21.2

ZERO SEQUENCE REACTANCE (NON-SATURATED VALUE) XOU

%

10.7

ZERO SEQUENCE REACTANCE (SATURATED VALUE)X0

%

10.2

DIRECT AXIS OPEN CIRCUIT TRANSIENT TIME CONSTANT T'DO

S

8.73

HORIZONTAL AXIS OPEN CIRCUIT TRANSIENT TIME CONSTANT T'QO

S

0.97

DIRECT AXIS SHORT CIRCUIT TRANSIENT TIME CONSTANT T'D

S

1.065

SUPER-TRANSIENT

REACTANCE

HORIZONTAL AXIS SUPER-TRANSIENT SATURATED VALUE) X"QU

(SATURATED

REACTANCE

9

BTG - ELECTRICAL DETAILS OF GENERATOR :DESCRIPTION

UNIT

DESIGN VALUE

PARAMETER PROPERTY HORIZONTAL AXIS SHORT CIRCUIT TRANSIENT TIME CONSTANT T'Q

S

0.179

DIRECT AXIS OPEN CONSTANT T"DO

TIME

S

0.045

HORIZONTAL AXIS OPEN CIRCUIT TRANSIENT TIME CONSTANT T"QO

S

0.068

DIRECT AXIS SHORT CIRCUIT SUPER TRANSIENT TIME CONSTANT T"D

S

0.035

HORIZONTAL AXIS SHORT CIRCUIT TRANSIENT TIME CONSTANT T"Q

S

0.035

DE-EXCITATION TIME CONSTANT TDM

S

3

FLYWHEEL MOMENT GD2

T-M2

41

CIRCUIT

TRANSIENT

SUPER

SHORT CIRCUIT RATIO SCR

0.518

STEADY STATUS NEGATIVE SEQUENCE CURRENT I2

%

8

TRANSIENT STATUS CURRENTI22T

S

8

NEGATIVE

SEQUENCE

10

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

PARAMETER PROPERTY ALLOWABLE FREQUENCY DEVIATION

+3 ±%

-5

ALLOWABLE STATOR VOLTAGE DEVIATION

±%

5

DE-EXCITATION ASYNCHRONOUS RUN CAPABILITY

MW

DE-EXCITATION ASYNCHRONOUS RUNTIME

MIN

SEE 4.2.13.4

LEADING PHASE RUN CAPABILITY

MW

660

LEADING PHASE RUNTIME (H FOR RUN HOUR)

H

0.95PF (ADVANCE) LONG TERM CONTINUOUS RUN

THF TELEPHONE HARMONIC FACTOR

%

KU VOLTAGE WAVEFORM SINUS DISTORTION RATE KU

%

THREE PHASE SHORT CIRCUIT STEADY STATUS CURRENT

%

162

PHASE-NEUTRAL POINT

%

584

PHASE-PHASE

%

407

THREE PHASE

%

416

TRANSIENT STATUS SHORT CIRCUIT CURRENT EFFECTIVE (AC COMPONENT)

11

BTG - ELECTRICAL DETAILS OF GENERATOR :DESCRIPTION

UNIT

DESIGN VALUE

PARAMETER PROPERTY SUB-TRANSIENT STATUS SHORT CIRCUIT EFFECTIVE VALUE (AC COMPONENT)

CURRENT

PHASE-NEUTRAL POINT

%

633

PHASE-PHASE

%

453

THREE PHASE

%

520

THREE PHASE SHORT CIRCUIT MAXIMUM CURRENT VALUE (INCLUDING DC COMPONENT PEAK VALUE)

%

1200

PHASE-PHASE SHORT CIRCUIT MAXIMUM ELECTROMAGNETIC TORSION

T.M

2130

ROTOR AXIAL VOLTAGE

V

BEARING INSULATION RESISTANCE NORMAL/MINIMUM VALUE

MW

MAXIMUM ALLOWABLE OVER-SPEED

%

120

OUT OF STEP POWER

MW

1260

GENERATOR STATUS RUN CAPABILITY

S ALLOWING 10000TIMES MACHINE START/STOP.

PEAK ADJUSTMENT CAPABILITY GENERATOR SERVICE LIFE

YEAR

30

NOISE

DB

90

12

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

VIBRATION VALUE CRITICAL SPEED (FIRST ORDER)

R/MIN

690

CRITICAL SPEED (SECOND ORDER)

R/MIN

1935

CRITICAL SPEED BEARING VIBRATION VALUE VERTICAL

MM

HORIZONTAL

MM

BEARING VIBRATION VALUE IN CASE OF OVER-SPEED VERTICAL

MM

HORIZONTAL

MM

BEARING VIBRATION VALUE IN CASE OF RATED ROTATION SPEED VERTICAL

MM

HORIZONTAL

MM

CRITICAL SPEED AXIS VIBRATION VALUE VERTICAL

MM 13

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

VIBRATION VALUE HORIZONTAL

MM

AXIS VIBRATION VALUE IN CASE OF OVER-SPEED VERTICAL

MM

HORIZONTAL

MM

AXIS VIBRATION VALUE IN CASE OF RATED ROTATION SPEED VERTICAL

MM

HORIZONTAL

MM

FV STATOR WINDING TERMINAL VIBRATION FREQUENCY

HZ

STATOR WINDING TERMINAL VIBRATION AMPLITUDE VALUE MM AXIAL TORSIONAL FREQUENCY

≤0.1（1.0 UN NO-LOAD OR 1.0 I N SHORT CIRCUIT. ）

HZ 14

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

LOSS AND EFFICIENCY ( UNDER RATED CONDITIONS) STATOR WINDING COPPER LOSS QCU1

KW

1803

STATOR IRON LOSS QFE

KW

637

EXCITATION LOSS QCU2

KW

2208

SHORT CIRCUIT QKD

KW

1055

KW

1607

ADDITIONAL LOSS

MECHANICAL LOSS QM EXCITATION MACHINE EQUIPMENT LOSS

AND

KW

TOTAL LOSS ΣQ

KW

7310

FULL LOAD EFFICIENCY Η

%

98.9

15

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

UNIT

DESIGN VALUE

INSULATION GRADE AND TEMPERATURE STATOR WINDING INSULATION GRADE WINDING OUTLET WATER TEMPERATURE STATOR WINDING THA WORK CONDITIONS

F UNDER ℃

WINDING OUTLET WATER TEMPERATURE UNDER STATOR WINDING T-MCR WORK CONDITIONS

℃

WINDING OUTLET WATER TEMPERATURE UNDER STATOR WINDING VWO WORK CONDITIONS

℃

INTERLAYER TEMPERATURE UNDER STATOR WINDING THA WORK CONDITIONS

℃

INTERLAYER TEMPERATURE UNDER STATOR WINDING T-MCR WORK CONDITIONS

℃

INTERLAYER TEMPERATURE UNDER STATOR WINDING VWO WORK CONDITIONS

℃

STATOR IRON CORE INSULATION GRADE

74

79

F 16

BTG - ELECTRICAL DETAILS OF GENERATOR :-

DESCRIPTION

DESIGN VALUE

UNIT

INSULATION GRADE AND TEMPERATURE

HOTTEST POINT TEMPERATURE UNDER STATOR IRON CORE THA WORK CONDITIONS

℃

HOTTEST POINT TEMPERATURE UNDER STATOR IRON CORE T-MCR WORK CONDITIONS

℃

TEMPERATURE UNDER STATOR TERMINAL STRUCTURE PART THA WORK CONDITIONS

℃

TEMPERATURE UNDER STATOR TERMINAL STRUCTURE PART T-MCR WORK CONDITIONS

℃

TEMPERATURE UNDER STATOR TERMINAL STRUCTURE PART VWO WORK CONDITIONS

℃

88

ROTOR WINDING INSULATION GRADE TEMPERATURE UNDER ROTOR WINDING THA WORK CONDITIONS (RESISTANCE METHOD) TEMPERATURE UNDER ROTOR WINDING T-MCR WORK CONDITIONS (RESISTANCE METHOD)

F ℃

92 ℃ 17

BTG - ELECTRICAL DETAILS OF EXCITATION TRANSFORMER :-

DESCRIPTION

UNIT

DESIGN VALUE

EXCITAION TRANSFORMER TYPE

SINGLE PHASE DRY TYPE

MODEL CAPACITY

KVA

MANUFACTURER

3×2950 JINPAN/SHUNTE

RATED VOLTAGE RATED VOLTAGE PRIMARY PRIMARY

KV

22

V 1060

FREQUENCY PHASE NO. CONNECTION GROUP CATEGORY

HZ

50 3 Ｙ/△-11

TERMINAL LEAD-OUT AND GROUNDING MODE INSULATION GRADE

F 18

BTG - ELECTRICAL DETAILS OF EXCITATION TRANSFORMER :-

DESCRIPTION

UNIT

DESIGN VALUE

EXCITAION TRANSFORMER INSULATION WITHSTAND VOLTAGE

KV

IMPACT VOLTAGE

KV

HIGH SIDE

125

LOW SIDE HIGH SIDE

KV

LOW SIDE

50

PROTECTION GRADE

IP23

COOLING MODE

AN/AF

LOSS

COPPER LOSS

KW

26

IRON LOSS

KW

14

LOSS ADDITIONAL LOSS

KW

9

LOSS TOTAL LOSS

KW

49

EFFICIENCY

％

99.8 19

BTG - ELECTRICAL DETAILS OF EXCITATION TRANSFORMER :-

DESCRIPTION

UNIT

DESIGN VALUE

EXCITAION TRANSFORMER VOLTAGE REGULATION

％

±5

IMPEDANCE VOLTAGE

％

8

POSITIVE SEQUENCE IMPEDANCE

％

8

ZERO SEQUENCE IMPEDANCE

％

7.2

HIGH VOLTAGE WINDING RESISTANCE

Ω

3×0.1138

EXCITATION CURRENT

A

0.9

NOISE LEVEL

DBA

70

OVERLOAD CAPACITY OVERLOAD CAPACITY

KVA

1.1 LONG TERM

TRANSFORMER TEMPERATURE SIGNAL

I SECTION OVER TEMPERATURE ALARM II SECTION OVER TEMPERATURE TRIPPING

TRANSFORMER MAXIMUM ALLOWABLE TEMPERATURE RISE

100K

EXTERNAL SIZE (L×W×H)

MM

3400×1520×2950

TRANSPORT SIZE (L×W×H)

MM

4100×2600×2950

WEIGHT

T

19.6

20

BTG - ELECTRICAL DETAILS OF EXCITATION POWER CABINET :-

DESCRIPTION

UNIT

DESIGN VALUE

EXCITATION POWER CABINET TYPE THYRISTOR POWER ELEMENT RATED VOLTAGE

V

RATED CURRENT

A

2075

REVERSE PEAK VOLTAGE

V

4200

RATED CURRENT

A

1700

COOLING MODE

FORCE WIND COOLING

ELEMENT NO. SERIES CONNECTIONS FOR EACH CABINET AND EACH BRIDGE ARM

PCS

1

PARALLEL CONNECTION BRANCH NO. FOR EACH CABINET AND EACH BRIDGE ARM

PCS

6

RECTIFICATION CABINET NOISE

DB

≤65DB

H

45000

BLOWER FAN AVERAGE NO-FAULT TIME POWER CABINET NO.

5

CURRENT SHARING FACTOR

0.95

Voltage sharing factor

21

BTG - ELECTRICAL DETAILS OF EXCITATION POWER CABINET :-

DESCRIPTION

UNIT

DESIGN VALUE

MAGNETIC FIELD BREAKER RATED VOLTAGE

V

2000

RATED CURRENT RATED CURRENT

A

6000

BREAKING CURRENT

A

75000

CONTROL VOLTAGE (DC) MAX. ARC VOLTAGE（ABOVE 2000V）

VD.C

220

V

2800

MANUFACTURER

ABB

MODEL

HPB60M-82S

22

BTG - ELECTRICAL DETAILS OF EXCITATION POWER CABINET :-

DESCRIPTION

UNIT

DESIGN VALUE

AVR PROPRTY VOLTAGE REGULATION

％

30%～110% UG0

MANUAL REGULATION SCOPE

％

10%IF0～110% IFN

STATIC DIFFERENCE RATE

％

±1

TRANSITION STATUS RESOLUTION

MS

SINGLE TIME RECORD LENGTH

S

TOTAL RECORD LENGTH

S

1000

RISE TIME

S

≤0.04

CONTROL PERIOD

MS

SAMPLING MODE PHASE FREQUENCY MARGIN AMPLITUDE FREQUENCY MARGIN CONTROL RULE

AC °

≥40°

DB

≥6DB PID

MANUFACTURER

23

BTG - ELECTRICAL DETAILS OF EXCITATION POWER CABINET :-

DESCRIPTION

UNIT

DESIGN VALUE

EXCITATION INITIATING CIRCUIT PARAMETER EXCITATION INITIATING VOLTAGE

V/AC

415

EXCITATION INITIATING CURRENT

A

150

KVA

65

MJ

5

EXCITATION INITIATING POWER WASTE ROTOR OVER VOLTAGE PROTECTION OVER VOLTAGE NON LINEAR RESISTANCE CAPACITY OVER VOLTAGE PROTECTION ACTION VOLTAGE VALUE

4UFN~6 UFN

24

BTG - ELECTRICAL

DETAILS OF NGT CABINET :-

QUANTITY TYPE & SPECIFICATION

UNIT UNIT # 1

UNIT # 2

UNIT # 3

TOTAL

1

1

1

3

SINGLE PHASE ISOLATOR: 22KV / 400A NGT: 22/0.22KV, 50KVA

RESISTANCE: 0.4Ω, 50KW CT OF NGT SECONDARY WIRING: 500/5A, 5P20

SET

CT OF NGT PRIMARY WIRING: 5/5A, 0.5 25

BTG - ELECTRICAL

DETAILS OF PT / LA CABINET :-

QUANTITY TYPE & SPECIFICATION

RN4 - 22, 0.5A Y5W1 - 24 / 61.6

UNIT

SET

UNIT # 1

UNIT # 2

UNIT # 3

TOTAL

1

1

1

3

22/√3, 0.11/√3, 0.11/√3, 0.11/3 KV 0.2/3P/3P, 60VA SEMI-INSULATING

22/√3, 0.11/√3, 0.11/√3, 0.11/3 KV 0.2/3P/3P, 60VA SEMI-INSULATING

22/√3, 0.11/√3, 0.11/3, 0.11/3 KV 0.2/3P/3P, 60VA FULL-INSULATING

26

BTG - ELECTRICAL DETAILS OF GENERATOR PROTECTION:SR.NO.

GENERATOR PROTECTION

1

GENERATOR DIFFERENTIAL PROTECTION

2

VOLTAGE RESTRAINED OVER CURRENT PROTECTION

3

GENERATOR BACK-UP IMPEDANCE

4

STATOR EARTH FAULT 95% & 100% PROTECTION

PROTECTION CODE 87G 51VG） 21G 64G1, 64G2

A)

GENERATOR STATOR 95% EARTHING PROTECTION

64G1 (ZERO SEQUENCE VOLTAGE THEORY)

B)

GENERATOR STATOR 100％ EARTHING PROTECTION

64G2 (THIRD-HARMONIC THEORY)

5

STATOR INTER-TURN FAULT PROTECTION

95G

6

ASYMMETRIC NEGATIVE PHASE SEQUENCE OVER CURRENT PROTECTION

46G

7

SYMMETRICAL THERMAL OVERLOAD PROTECTION

49G）

8

OVER/UNDER VOLTAGE PROTECTION

59/27G

9

OVER/UNDER FREQUENCY PROTECTION

81G

10

LOSS OF EXCITATION PROTECTION

40G

27

BTG - ELECTRICAL DETAILS OF GENERATOR PROTECTION:-

SR.NO

GENERATOR PROTECTION

PROTECTION CODE

11

REVERSE POWER PROTECTION

32G

12

LOW FORWARD POWER PROTECTION

37G

13

GENERATOR OUT OF STEP PROTECTION

78G

14

OVER EXCITATION PROTECTION

61G

15

GENERATOR BACK-ENERGIZATION PROTECTION

51BEG

16

GENERATOR ROTOR EARTH FAULT PROTECTION

64F1、64F2

17

STARTUP/SHUTDOWN PROTECTION

59G

18

GENERATOR COOLING WATER-LOSS PROTECTION

30G

19

HEAT ENGINEERING PROTECTION

20

ET INSTANTANEOUS OVERCURRENT PROTECTION

（30T） 50SET 28

BTG - ELECTRICAL DETAILS OF GENERATOR PROTECTION:-

SR.NO

GENERATOR PROTECTION

PROTECTION CODE

21

ET OVERCURRENT PROTECTION

51ET

22

ET EXCITATION WINDING THERMAL OVERLOAD PROTECTION

49ET

23

ET WINDING TEMPERATURE PROTECTION

ET26W

24

CT, VT SUPERVISION PROTECTION

97，60

25

UNIT EMERGENCE TRIPPING INTERFACE

26

EXCITATION SYSTEM FAULT TRIPPING INTERFACE

27

400KV BREAKER OUR OF ORDER TRIPPING INTERFACE

29

BTG - ELECTRICAL SLD FOR GENERATOR AND GEN. PROTECTION & METERING:TO GT & UT 22 KV IPBD TA9:400 / 5A 5P20 60VA

GPP - A

TA10:400 / 5A 5P20 60VA TA11:400 / 5A 0.5 30VA

TA8:25000 / 5A 5P40 60VA

IPBD

TA7:25000 / 5A 5P40 60VA

GPP - B

GTP DC ENB

PT / LA CABINET

AVR

TA12:7500 / 5A 5P20 60VA

CABLE

GPP – A, GEMP GPP – B - GFR

GTP & AVR AVR

TA13:7500 / 5A 5P20 60VA

GEN

-

1060V GPP - A

TA5:25000 / 5A 0.2 100VA

GPP - B

+ ET

GPP – B, GTP & AVR

TA6:25000 / 5A 0.2 100VA

GPP - A

GPP - B GPP - A SPARE

TA14:7500 / 5A 0.5 30VA

TA4:25000 / 5A 0.2S 100VA

GEMP

TA3:25000 / 5A 5P40 60VA

GPP - B

TA2:25000 / 5A 5P40 60VA

GPP - A

TA1:25000 / 5A 5P40 60VA

AC ENB

TO GEN. & UT PROT. PANEL USING FOR OVERALL DIFFERENTIAL PROTECTION

GTP TO GEN. SHAFT

GPP – A GPP – B

GPP – A, GPP – B - GFR

N.G.T.

415 V MCC TA0: 5 / 5A 0.5 30VA

GFR

EARTHING

30

BTG - ELECTRICAL

31

VOTE OF THANKS

32