Ground Report SWI v1[1].pdf

8/10/2019 Ground Report SWI v1[1].pdf

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Ground calculation report

Calculation according IEEE 80

SWI S b t ti


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S M NS

Ground calculation report

Calculation according IEEE 80Projec t MPT Substat ion

FIELD DATA

L = Length of substation (in X-Axis) = 32.000 m.

W = Width of substation (in Y-Axis) = 20.000 m.

Then, A = Area of substation = 640.00 m.

Soil resisvity

R(Average)

6

(Average)


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S M NS

CALCULATION SIZING OF GROUND CONDUCTORS

From :-

Ac = [ Eq. 40 ]

Where :- SELECTED GROUND GRID CONDUCTOR AS Commercail Hard Drawn Copper Wire

A c = Ground conductor cross section = ? mm.

I th = Max. Fault current = 31.5 kA.

t c = Duration of fault current = 1 Sec.

r = Thermal coefficient of resistivity = 0.00381 C

r = Resistvity of ground conductor = 1.7774 Ohm.cm

TCAP = Thermal capacity factor = 3.422 J/(cm.C)

Tm = Max. allowable temperature = 1083 C

T a = Ambient temperature = 52 C

K o = (1/ r)-T r = 242 C

Then

A c = 114.200 mm.

Then, Selected Strand copper conductor 120 mm. for earth terminal's equipment

DETERMINATION OF MAXIMUM GRID CURRENT

Ig = S(f) x I(F) x 1,000 [ Eq. 65 ]

Wh

a

m

rrc

th

TK

TK

t

TCAP

I

0

0

4

ln10


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s

Power Transmiss ion and Distribut ion Division : PTD

Engineering Department : PTD E

CUSTOMER :

SUBSTATION : Temperature : 30 C

PROVINCE : Test Method :

115/22KV.SUBSTATION

Korat Four point method

Measuring Resist ivity of Soil

TEST REPORT

Contract No. 56OP-00600

Report No.Inspection : Resistivity of Soil

CONNECTION DIAGRAM

SWI


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s

Power Transmiss ion and Distribut ion Division : PTDEngineering Department : PTD E

CUSTOMER :

SUBSTATION : Temperature : 30 C

PROVINCE : Test Method :

115/22KV.SUBSTATION

Korat Four point method

TEST REPORT

Contract No. 56OP-00600

Report No.Inspection : Resistivity of Soil

SWI

POINTS a (m) 0.5 1 3 6 10

Depth (cm) 15 15 15 15 15

A A1 23.2 13.59 7.7 3.49 1.21

A2 22.4 15.9 8.03 3.3 1.26B B1 22.5 13.4 8.91 3.87 1.6

C C1 23.6 17.6 8.4 3.6 1.24

D D1 25.9 15.7 7.5 3.4 1.8

MEASURED VALUES ( )

Remark

TEST DATA


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1


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Soil analysis report

********************************************************************************

Title : Untitled

Project : SWI

Study : V6 two layer

********************************************************************************

OUTPUT RESULTS

================================================================================

Upper layer thickness : 0.50 meters

Upper layer resistivity : 70.63 ohm-m

Lower layer resistivity : 115.18 ohm-m

Spacing (meters) Resistivity (Ohm-m)

--------------------------------------

0.15 70.95

0.30 72.69

0.44 75.88

0.59 79.77

0.74 83.72

0.89 87.39

1.03 90.64

1.18 93.46

1.33 95.89

1.48 97.97

1.62 99.75

1.77 101.30

1.92 102.63

2.07 103.79

2.21 104.80

2.36 105.69

2.51 106.48

2.66 107.17

2.80 107.79 2.95 108.35

3.10 108.84

3.25 109.28

3.39 109.69

3.54 110.05

3.69 110.38

3.84 110.68

3.98 110.95

4.13 111.20

4.28 111.43


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4.43 111.64

4.57 111.83

4.72 112.01

4.87 112.18

5.02 112.33

5.16 112.47

5.31 112.60

5.46 112.72

5.61 112.84

5.75 112.94

5.90 113.04

6.05 113.14

6.20 113.23

6.34 113.31

6.49 113.38

6.64 113.46

6.79 113.52

6.93 113.59

7.08 113.65

7.23 113.71

7.38 113.76

7.52 113.81

7.67 113.86

7.82 113.91

7.97 113.95

8.11 113.99

8.26 114.03

8.41 114.07

8.56 114.11

8.70 114.14

8.85 114.17

9.00 114.20

9.15 114.23

9.29 114.26

9.44 114.29

9.59 114.32 9.74 114.34

9.88 114.37

10.03 114.39

10.18 114.41

10.33 114.43

10.47 114.45

10.62 114.47

10.77 114.49

10.92 114.51

11.06 114.52


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11.21 114.54

11.36 114.56

11.51 114.57

11.65 114.59

11.80 114.60

11.95 114.62

12.10 114.63

12.24 114.64

12.39 114.65

12.54 114.67

12.69 114.68

12.83 114.69

12.98 114.70

13.13 114.71

13.28 114.72

13.42 114.73

13.57 114.74

13.72 114.75

13.87 114.76

14.01 114.77

14.16 114.78

14.31 114.78

14.46 114.79

14.60 114.80 14.75 114.81

Resistivity (Ohm-m) Resistivity (Ohm-m)

Spacing (meters) ***** measured ***** **** calculated **** Error (%)

-----------------------------------------------------------------------

0.50 73.02 77.31 5.88

1.00 92.91 89.93 -3.21

3.00 156.01 108.51 -30.44

6.00 135.33 113.11 -16.42

10.00 91.25 114.38 25.35

RMS error : 19.41%


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2


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Safety assessment report

********************************************************************************

Title : Untitled

Project : SWI


********************************************************************************

INPUT DATA

================================================================================

Body weight : 50 kg

Surface layer thickness : 0.20 meters

Surface layer resistivity : 3000.00 ohm-m



Lower layer resistivity : 115.18 ohm-m

Shock duration : 0.60 secs

OUTPUT RESULTS

================================================================================

Reduction factor C (IEEE 80) : 0.77

Maximum allowable touch : 668.34 volts

Maximum allowable step : 2224.08 volts


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rod =6m

rod =6m

rod =3m

G id l i t


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Grid analysis report

********************************************************************************

Station : 11KA

Project : SWI


********************************************************************************

OUTPUT RESULTS

================================================================================

Elements length and/or resistivities not comparable

Grid element(s) with maximum current error found.

Element X1 Y1 Z1 X2 Y2 Z2 Length Radius Current

--------------------------------------------------------------------------------

0051 32.0 19.5 0.5 31.5 20.0 0.5 0.71 0.0071 -1.1125

Error : 0.02 %

Dimensioning of primary electrodes

Element X1 Y1 Z1 X2 Y2 Z2 Length Radius Current

--------------------------------------------------------------------------------

0001 0.0 0.0 0.5 32.0 0.0 0.5 32.00 0.0071 358.5133

0002 0.0 0.5 0.5 32.0 0.5 0.5 32.00 0.0071 174.9758

0003 0.0 1.0 0.5 32.0 1.0 0.5 32.00 0.0071 157.3269

0004 0.0 2.5 0.5 32.0 2.5 0.5 32.00 0.0071 190.6723

0005 0.0 3.8 0.5 1.0 3.8 0.5 1.00 0.0071 4.3368

0006 32.0 3.8 0.5 31.0 3.8 0.5 1.00 0.0071 4.3795

0007 0.0 5.0 0.5 32.0 5.0 0.5 32.00 0.0071 157.2091

0008 0.0 7.5 0.5 12.5 7.5 0.5 12.50 0.0071 59.2627

0009 20.0 7.5 0.5 32.0 7.5 0.5 12.00 0.0071 57.4430

0010 0.0 18.0 0.5 32.0 18.0 0.5 32.00 0.0071 188.48480011 0.0 20.0 0.5 32.0 20.0 0.5 32.00 0.0071 359.0738

0012 0.0 19.5 0.5 32.0 19.5 0.5 32.00 0.0071 172.0244

0013 0.0 19.0 0.5 32.0 19.0 0.5 32.00 0.0071 146.9587

0014 0.0 16.8 0.5 1.0 16.8 0.5 1.00 0.0071 3.3623

0015 32.0 16.8 0.5 31.0 16.8 0.5 1.00 0.0071 3.3288

0016 0.0 15.5 0.5 32.0 15.5 0.5 32.00 0.0071 199.7428

0017 0.0 13.0 0.5 32.0 13.0 0.5 32.00 0.0071 141.5858

0018 0.0 10.5 0.5 12.5 10.5 0.5 12.50 0.0071 58.2615

0019 20.0 10.5 0.5 32.0 10.5 0.5 12.00 0.0071 60.8140

0020 0.0 0.0 0.5 0.0 20.0 0.5 20.00 0.0071 220.5412

0021 0 5 0 0 0 5 0 5 20 0 0 5 20 00 0 0071 91 0688


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0021 0.5 0.0 0.5 0.5 20.0 0.5 20.00 0.0071 91.0688

0022 1.0 0.0 0.5 1.0 20.0 0.5 20.00 0.0071 56.0563

0023 2.5 0.0 0.5 2.5 20.0 0.5 20.00 0.0071 114.3905

0024 3.8 0.0 0.5 3.8 1.0 0.5 1.00 0.0071 6.6959

0025 3.8 20.0 0.5 3.8 19.0 0.5 1.00 0.0071 6.1437

0026 5.0 0.0 0.5 5.0 20.0 0.5 20.00 0.0071 144.6540

0027 6.3 0.0 0.5 6.3 1.0 0.5 1.00 0.0071 6.8780

0028 6.3 20.0 0.5 6.3 19.0 0.5 1.00 0.0071 6.7135

0029 7.5 0.0 0.5 7.5 20.0 0.5 20.00 0.0071 126.4042

0030 10.0 0.0 0.5 10.0 7.5 0.5 7.50 0.0071 32.1893

0031 10.0 10.5 0.5 10.0 20.0 0.5 9.50 0.0071 47.5976

0032 12.5 0.0 0.5 12.5 20.0 0.5 20.00 0.0071 67.2704

0033 15.0 0.0 0.5 15.0 5.0 0.5 5.00 0.0071 19.9367

0034 15.0 13.0 0.5 15.0 20.0 0.5 7.00 0.0071 34.0922

0035 17.5 0.0 0.5 17.5 5.0 0.5 5.00 0.0071 19.9218

0036 17.5 13.0 0.5 17.5 20.0 0.5 7.00 0.0071 34.0532

0037 20.0 0.0 0.5 20.0 20.0 0.5 20.00 0.0071 62.9843

0038 22.5 0.0 0.5 22.5 20.0 0.5 20.00 0.0071 102.9202

0039 25.0 0.0 0.5 25.0 20.0 0.5 20.00 0.0071 116.9292

0040 26.3 0.0 0.5 26.3 1.0 0.5 1.00 0.0071 7.1324

0041 26.3 20.0 0.5 26.3 19.0 0.5 1.00 0.0071 6.7588

0042 27.5 0.0 0.5 27.5 20.0 0.5 20.00 0.0071 138.0587

0043 28.8 0.0 0.5 28.8 1.0 0.5 1.00 0.0071 6.4084

0044 28.8 20.0 0.5 28.8 19.0 0.5 1.00 0.0071 5.68910045 30.0 0.0 0.5 30.0 20.0 0.5 20.00 0.0071 93.8051

0046 31.0 0.0 0.5 31.0 20.0 0.5 20.00 0.0071 48.1574

0047 31.5 0.0 0.5 31.5 20.0 0.5 20.00 0.0071 87.9145

0048 32.0 0.0 0.5 32.0 20.0 0.5 20.00 0.0071 218.9039

0049 0.5 0.0 0.5 0.0 0.5 0.5 0.71 0.0071 0.0000

0050 0.0 19.5 0.5 0.5 20.0 0.5 0.71 0.0071 0.0000

0051 32.0 19.5 0.5 31.5 20.0 0.5 0.71 0.0071 0.0000

0052 32.0 0.5 0.5 31.5 0.0 0.5 0.71 0.0071 0.0000

0053 0.0 6.3 0.5 1.0 6.3 0.5 1.00 0.0071 4.6571

0054 32.0 6.3 0.5 31.0 6.3 0.5 1.00 0.0071 4.7093

0055 0.0 9.0 0.5 1.0 9.0 0.5 1.00 0.0071 5.8656

0056 32.0 9.0 0.5 31.0 9.0 0.5 1.00 0.0071 5.8208

0057 32.0 11.8 0.5 31.0 11.8 0.5 1.00 0.0071 4.4762

0058 1.0 11.8 0.5 0.0 11.8 0.5 1.00 0.0071 4.5558

0059 1.0 14.3 0.5 0.0 14.3 0.5 1.00 0.0071 4.0077

0060 31.0 14.3 0.5 32.0 14.3 0.5 1.00 0.0071 4.0019

0061 8.8 0.0 0.5 8.8 1.0 0.5 1.00 0.0071 6.7004

0062 8.8 20.0 0.5 8.8 19.0 0.5 1.00 0.0071 6.8415

0063 11.3 0.0 0.5 11.3 1.0 0.5 1.00 0.0071 6.3295

0064 11.3 20.0 0.5 11.3 19.0 0.5 1.00 0.0071 6.9207

0065 13.8 0.0 0.5 13.8 1.0 0.5 1.00 0.0071 5.7958

0066 13.8 20.0 0.5 13.8 19.0 0.5 1.00 0.0071 6.5599

0067 16 3 0 0 0 5 16 3 1 0 0 5 1 00 0 0071 5 5327


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0067 16.3 0.0 0.5 16.3 1.0 0.5 1.00 0.0071 5.5327

0068 16.3 20.0 0.5 16.3 19.0 0.5 1.00 0.0071 6.1654

0069 18.8 0.0 0.5 18.8 1.0 0.5 1.00 0.0071 5.8935

0070 18.8 20.0 0.5 18.8 19.0 0.5 1.00 0.0071 6.6383

0071 21.3 0.0 0.5 21.3 1.0 0.5 1.00 0.0071 6.3744

0072 21.3 20.0 0.5 21.3 19.0 0.5 1.00 0.0071 6.9897

0073 23.8 0.0 0.5 23.8 1.0 0.5 1.00 0.0071 6.8501

0074 23.8 19.0 0.5 23.8 20.0 0.5 1.00 0.0071 6.9226

Total length of conductor elements : 778.83 meters

0075 0.0 0.0 0.5 0.0 0.0 6.5 6.00 0.0079 171.88150076 1.0 1.0 0.5 1.0 1.0 3.5 3.00 0.0079 38.7325

0077 1.0 19.0 0.5 1.0 19.0 3.5 3.00 0.0079 35.7645

0078 31.0 1.0 0.5 31.0 1.0 3.5 3.00 0.0079 37.0422

0079 31.0 19.0 0.5 31.0 19.0 3.5 3.00 0.0079 34.0318

0080 0.0 2.5 0.5 0.0 2.5 3.5 3.00 0.0079 63.6844

0081 32.0 2.5 0.5 32.0 2.5 3.5 3.00 0.0079 63.4522

0082 0.0 5.0 0.5 0.0 5.0 3.5 3.00 0.0079 66.0155

0083 32.0 5.0 0.5 32.0 5.0 3.5 3.00 0.0079 65.9975

0084 0.0 7.5 0.5 0.0 7.5 3.5 3.00 0.0079 67.1015

0085 32.0 7.5 0.5 32.0 7.5 3.5 3.00 0.0079 67.0333

0086 0.0 10.5 0.5 0.0 10.5 3.5 3.00 0.0079 66.7640

0087 1.0 9.0 0.5 1.0 9.0 3.5 3.00 0.0079 52.36630088 31.0 9.0 0.5 31.0 9.0 3.5 3.00 0.0079 52.0572

0089 32.0 10.5 0.5 32.0 10.5 3.5 3.00 0.0079 66.5322

0090 0.0 13.0 0.5 0.0 13.0 3.5 3.00 0.0079 65.3432

0091 32.0 13.0 0.5 32.0 13.0 3.5 3.00 0.0079 65.1815

0092 0.0 15.5 0.5 0.0 15.5 3.5 3.00 0.0079 64.8502

0093 32.0 15.5 0.5 32.0 15.5 3.5 3.00 0.0079 64.6910

0094 0.0 18.0 0.5 0.0 18.0 3.5 3.00 0.0079 58.2411

0095 32.0 18.0 0.5 32.0 18.0 3.5 3.00 0.0079 57.8432

0096 0.0 20.0 0.5 0.0 20.0 6.5 6.00 0.0079 170.7105

0097 2.5 0.0 0.5 2.5 0.0 3.5 3.00 0.0079 66.0405

0098 2.5 20.0 0.5 2.5 20.0 3.5 3.00 0.0079 65.2345

0099 5.0 0.0 0.5 5.0 0.0 3.5 3.00 0.0079 70.6871

0100 5.0 20.0 0.5 5.0 20.0 3.5 3.00 0.0079 70.6569

0101 7.5 0.0 0.5 7.5 0.0 3.5 3.00 0.0079 69.5365

0102 7.5 20.0 0.5 7.5 20.0 3.5 3.00 0.0079 70.2835

0103 10.0 0.0 0.5 10.0 0.0 3.5 3.00 0.0079 67.7323

0104 10.0 20.0 0.5 10.0 20.0 3.5 3.00 0.0079 69.2500

0105 12.5 0.0 0.5 12.5 0.0 3.5 3.00 0.0079 65.9283

0106 12.5 20.0 0.5 12.5 20.0 3.5 3.00 0.0079 68.3502

0107 12.5 5.0 0.5 12.5 5.0 6.5 6.00 0.0079 109.6577

0108 12.5 13.0 0.5 12.5 13.0 6.5 6.00 0.0079 105.4195

0109 12.5 9.0 0.5 12.5 9.0 6.5 6.00 0.0079 94.2679

0110 15.0 0.0 0.5 15.0 0.0 3.5 3.00 0.0079 64.7621


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0110 15.0 0.0 0.5 15.0 0.0 3.5 3.00 0.0079 64.7621

0111 15.0 20.0 0.5 15.0 20.0 3.5 3.00 0.0079 67.2131

0112 17.5 20.0 0.5 17.5 20.0 3.5 3.00 0.0079 67.2862

0113 17.5 0.0 0.5 17.5 0.0 3.5 3.00 0.0079 64.8705

0114 16.3 5.0 0.5 16.3 5.0 6.5 6.00 0.0079 109.8654

0115 16.3 13.0 0.5 16.3 13.0 6.5 6.00 0.0079 105.4323

0116 20.0 0.0 0.5 20.0 0.0 3.5 3.00 0.0079 66.2741

0117 20.0 20.0 0.5 20.0 20.0 3.5 3.00 0.0079 68.5683

0118 20.0 5.0 0.5 20.0 5.0 6.5 6.00 0.0079 110.2037

0119 20.0 13.0 0.5 20.0 13.0 6.5 6.00 0.0079 105.4572

0120 20.0 7.5 0.5 20.0 7.5 6.5 6.00 0.0079 99.3133

0121 20.0 10.5 0.5 20.0 10.5 6.5 6.00 0.0079 97.69810122 22.5 0.0 0.5 22.5 0.0 3.5 3.00 0.0079 68.0542

0123 22.5 20.0 0.5 22.5 20.0 3.5 3.00 0.0079 69.4341

0124 25.0 0.0 0.5 25.0 0.0 3.5 3.00 0.0079 70.1733

0125 31.0 14.3 0.5 31.0 14.3 3.5 3.00 0.0079 48.9681

0126 25.0 7.5 0.5 25.0 7.5 3.5 3.00 0.0079 38.4008

0127 25.0 13.0 0.5 25.0 13.0 3.5 3.00 0.0079 39.1915

0128 31.0 16.8 0.5 31.0 16.8 3.5 3.00 0.0079 46.9332

0129 25.0 20.0 0.5 25.0 20.0 3.5 3.00 0.0079 70.5139

0130 27.5 0.0 0.5 27.5 0.0 3.5 3.00 0.0079 70.6804

0131 27.5 20.0 0.5 27.5 20.0 3.5 3.00 0.0079 70.2652

0132 30.0 0.0 0.5 30.0 0.0 3.5 3.00 0.0079 61.3381

0133 30.0 20.0 0.5 30.0 20.0 3.5 3.00 0.0079 60.31960134 32.0 0.0 0.5 32.0 0.0 6.5 6.00 0.0079 170.9995

0135 32.0 20.0 0.5 32.0 20.0 6.5 6.00 0.0079 169.7537

0136 10.0 10.5 0.5 10.0 10.5 6.5 6.00 0.0079 100.3955

0137 10.0 7.5 0.5 10.0 7.5 6.5 6.00 0.0079 102.0637

0138 31.0 6.3 0.5 31.0 6.3 3.5 3.00 0.0079 50.2652

0139 31.0 11.8 0.5 31.0 11.8 3.5 3.00 0.0079 49.6558

0140 31.0 3.8 0.5 31.0 3.8 3.5 3.00 0.0079 49.3065

0141 0.0 0.5 0.5 0.0 0.5 6.5 6.00 0.0079 161.0173

0142 0.5 0.0 0.5 0.5 0.0 6.5 6.00 0.0079 160.9940

0143 31.5 0.0 0.5 31.5 0.0 6.5 6.00 0.0079 159.0984

0144 32.0 0.5 0.5 32.0 0.5 6.5 6.00 0.0079 160.2724

0145 32.0 19.5 0.5 32.0 19.5 6.5 6.00 0.0079 157.7208

0146 31.5 20.0 0.5 31.5 20.0 6.5 6.00 0.0079 157.9227

0147 0.0 19.5 0.5 0.0 19.5 6.5 6.00 0.0079 158.5545

0148 0.5 20.0 0.5 0.5 20.0 6.5 6.00 0.0079 159.9046

0149 1.0 3.8 0.5 1.0 3.8 3.5 3.00 0.0079 49.4308

0150 1.0 6.3 0.5 1.0 6.3 3.5 3.00 0.0079 50.3948

0151 1.0 11.8 0.5 1.0 11.8 3.5 3.00 0.0079 50.0663

0152 1.0 14.3 0.5 1.0 14.3 3.5 3.00 0.0079 49.3090

0153 1.0 16.8 0.5 1.0 16.8 3.5 3.00 0.0079 47.2943

Total length of rod elements : 306.00 meters


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Ground potential rise : 17731.21 volts

Grounding resistance of primary electrode : 1.6122 ohms

Total impedance of installation : 1.6119 ohms


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4


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Potential contour plot #01


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********************************************************************************

Title : Potential contour plot #01

Project : SWI


********************************************************************************

Ground current : 11000.00 amps



Lower layer resistivity : 115.18 ohm-mReturn electrode current : 0.00 amps

Parallel Z : 9999.00 ohm

Equal potentials (distinct) : No


X intervals : 30

Y intervals : 30

Maximum potential point(s) X (meters) Y (meters) @ 1139.60 volts

--------------------------------------------------------------------------------

0.00 0.00

Thresholds Level #1 Level #2 Level #3

--------------------------------------------------------------------------------

Touch potential grading 222.56 445.11 668.34 volts


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5


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LINE # 1LINE # 2


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6


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Potential profile plot #01


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********************************************************************************

Title : Potential profile plot #01

Project : SWI


********************************************************************************








X1 : 0.00 meters

Y1 : 0.00 meters

X2 : 32.00 meters

Y2 : 20.00 meters

Step interval : 0.90 meters




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Potential profile plot #02


31/31

********************************************************************************

Title : Potential profile plot #02

Project : SWI


********************************************************************************








X1 : 32.00 meters

Y1 : 0.00 meters

X2 : 0.00 meters

Y2 : 20.00 meters

Step interval : 0.90 meters



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Ground Report SWI v1[1].pdf

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