220kv Budhil Line Rev-1

CONFIDENTIAL The information contained in this document is not to be communicated either directly or indi in dire rect ctll to an er erso son n no nott authorised to receive it.

SETTING CALCULATION FOR LINE PROTECTION RELAYS 220KV BUDHIL LINE PROTECTIONS

PROJECT

:220KV LANCO INFRATECH LIMITED CHAMERA 

GRID

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Length of protected line Positive Sequence Resistance per KM Positive Sequence Reactance per KM Positive sequence impedance per KM Zero Sequence Resistance per KM Zero Sequence Reactance per KM Zero Sequence Impedance per KM Positive Sequence Resistance for Protected line Positive Sequence Reactance for Protected line Positive Sequence Impedence for Protected line Positive sequence Impedence angle Zero Sequence Resistance for Protected line Zero Sequence Reactance for Protected line Zero Sequence Impedence for Protected line Zero Sequence Impedence Angle

19.8 0.0870 0.3273 0.3387 0.2610 0.9810 1.0151 1.72 6.48 6.706 75.09 5.168 19.424 20.100 75.07

KM Ohms Ohms Ohms Ohms Ohms Ohms Ohm Ohm Ohm Degree Ohm Ohm Ohm Degree

Length of the adjacent line Pos.Seq. Resistance of Adj. Line per KM Pos.Seq. Reactance of Adj. Line per KM Pos.Seq. Impedence of Adj. Line per KM Positive Sequence Resistance for adj.line Positive Sequence Reactance for adj.line Positive Sequence Impedence for adj.line Positive sequence Impedence angle

14.28 0.0290 0.3072 0.3086 0.4137 4.3868 4.4063 84.58

KM Ohm Ohm Ohm Ohm Ohm Ohm Degree

Length of the adjacent longest line Pos.Seq. Resistance of Adj. Line per KM Pos.Seq. Reactance of Adj. Line per KM Pos.Seq. Impedence of Adj. Line per KM Positive Sequence Resistance for adj. line Positive Sequence Reactance for adj. line Positive Sequence Impedence for adj. line Positive sequence Impedence angle

14.28 0.0290 0.3072 0.3086 0.4137 4.3868 4.4063 84.58

KM Ohm Ohm Ohm Ohm Ohm Ohm Degree

1800 1 220 110 0.90

Amp Amp Kilo Volt Volt

CT Primary CT Secondary PT Primary PT Secondary CT/PT Ratio

 ALSTOM T&D INDIA LTD FOR M/S CHAMERA-III HEP

19/1 G.S.T ROAD

220KV BUDHIL LINE PROTECTION REV-1

PALLAVARAM

Page 2 of 5

CHENNAI-600043

Grounding Factor kg = (Z0/Z1)/(3*Z1) (SQRT((X0(arc Tan((X0KZ1,KZ2,KZ3…..PS1 Angle Kg

0.666 -0.022 0.666 -0.022

DIST DIST DIST DIST

80% 50% 100% 25%

Z1 Z2 Z3 Z4

(100 of Protected line + (100 of Protected line +

80% of Protected line

Degree Degree of of of of

protected line shortest line longest line zone 1 impedence

Ohm

100% of protected line + 50% of shortest line

Ohm

100% of protected line + 100 % of longest

Ohm

25% of Zone 1 Impedence

Ohm

Primary full load current, CTR considered as Full load

1800

Amp

Resistance at this current=(0.8*(PT Primary * 10^3) / (1.732) / (1.2*Primary full load current)

47.045

Ohm

Load Resistance (RL) in Secondary DIST R1,PP(Circle) Ps1 (60% of RL) DIST R2,PP(Circle) Ps1 (60% of RL) DIST R3,PP(Circle) Ps1 (60% of RL) DIST R1,PG(Circle) Ps1 (80% of RL) DIST R2,PG(Circle) Ps1 (80% of RL) DIST R3,PG(Circle) Ps1 (80% of RL)

42.340 25.404 25.404 25.404 33.872 33.872 33.872

Ohm Ohm Ohm Ohm Ohm Ohm Ohm

0.00 0.30 0.75 1.00

SEC SEC SEC SEC

5.081

Ohm

ZONE ZONE ZONE ZONE

1 2 3 4

OPERATING OPERATING OPERATING OPERATING

TIME(t1) TIME(t2) TIME(t3) TIME(t4)

∆R

& ∆X ∆R = 10 to 30% of Z3 R3, PP

 ALSTOM T&D INDIA LTD FOR M/S CHAMERA-III HEP

19/1 G.S.T ROAD

220KV BUDHIL LINE PROTECTION REV-1

PALLAVARAM

Page 3 of 5

CHENNAI-600043

∆X

5.081

= 10 to 30% of Z3 R3, PP

Ohm

Unblocking stages using to trip if any fault when relay blocked on PSB The three unblocking current thresholds namely, IN>, I2> and Imax should be set IN> 40% I2> 30 % Value of Imax line = 3 Inom PSB Allowed to trip – Zone 1 To be set to 2s typically to un block in case of a prolonged power swing. Program Mode Standard Mode Z1Ext Fail Trip mode

Standard Scheme PUR Permissive under reach scheme Disabled 1 pole Z1 , CR Received

Switch on to fault logic is pre-set in MiCOM P442 I>3 Current Set I>3 Time delay I>4 Status Operation on pick up of level detector method and

3.00A 3sec Disabled activation of all zones is

Enable I> Current setting tI>1 Time delay IN>1 Current Setting IN>1 Time delay

Yes 3A 1.2 sec 0.3A 1.2 sec

IN>1 IN>1 IN>1 IN>1 IN>1 IN>1 IN>2

IDMT Directional Forward Non Directional 0.3 A 1.0 sec 1.0 sec Disabled

Function Directional VTS Block current set Time Delay Time VTS status

I2/I1 ratio Time Set

0.20. 60 Sec.

VTS Time Delay

5.000 s (alarm indication time )

 ALSTOM T&D INDIA LTD FOR M/S CHAMERA-III HEP

19/1 G.S.T ROAD

220KV BUDHIL LINE PROTECTION REV-1

PALLAVARAM

Page 4 of 5

CHENNAI-600043

VTS I2> & I0> Inhibit Detect 3P Threshold 3P U< Delta I>

50 mA Enabled 10 Volts 100 mA

V> V>1 Function V>1 Voltage Set V>1 Time Delay V>2 Status V>2 Voltage Set V>2 Time Delay

Measurement Mode Ph-N DT 121 V (110%) 3 sec Enabled 176 V (160%) 1 sec

 ALSTOM T&D INDIA LTD FOR M/S CHAMERA-III HEP

19/1 G.S.T ROAD

220KV BUDHIL LINE PROTECTION REV-1

PALLAVARAM

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CHENNAI-600043