arc-flash analysis of utility power systems - Michigan Technological ...

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3.4 ASPEN® Software ASPEN OneLiner TM was used for this project due to the fact that MP’s relay engineers use this product for their short circuit and relay coordination on the power system and is a highly recognized product in the power industry; OneLiner has a 46% market share according to an independent survey conducted in 2009. Figure 3.1 is a screen shot of an example one line system in ASPEN® selecting a position to run the arc-flash calculator. Figure 3.2 shows the user interface for the arc-flash calculator after it has been selected. Figure 3.1: ASPEN® with bus selected to run arc-flash calculator 18
Figure 3.2: ASPEN® arc-flash calculator displayed Prior to the kick-off of this project ASPEN® had just released their arc-flash calculator which allowed users to carry out the calculation on one equipment location on the system at a time. Figure 3.3 is a zoomed in view of the dialog box user interface with the calculator to enter options about the location of the equipment analyzed. The calculator uses IEEE Std. 1584-2002 equations, explained above in section 3.2, to calculate arcing current and the incident energy level at both 100% and 85% of the fault current. The calculation results are output to the TTY window. 19
Page 1 and 2: ARC-FLASH ANALYSIS OF UTILITY POWER
Page 3 and 4: Table of Contents Table of Contents
Page 5 and 6: List of Figures Figure 1.1: Lab dem
Page 7 and 8: Acknowledgements I would like to th
Page 9 and 10: Chapter 1: Introduction Electric ut
Page 11 and 12: 2, by using tables developed by the
Page 13 and 14: If the assessment reveals that the
Page 15 and 16: distance, I 2 t/d 3 , isn’t clear
Page 17 and 18: (subscript 1), one of moderate leng
Page 19 and 20: equations are used to calculate the
Page 21 and 22: By raising 10 to the power of l g E
Page 23 and 24: 3.3 National Electrical Safety Code
Page 25: Table 3.3: Live-line tool work PPE
Page 29 and 30: After the verification of the MATLA
Page 31 and 32: Figure 4.1: Example system oneline
Page 33 and 34: An evaluation of this condition was
Page 35 and 36: Figure 4.4: Incident energy using e
Page 37 and 38: Figure 4.6: Incident energy based o
Page 39 and 40: Figure 4.8: Incident energy followi
Page 41 and 42: Special consideration needs to be t
Page 43 and 44: Figure 4.11: Potential incident ene
Page 45 and 46: Chapter 5: Mitigation Methods and H
Page 47 and 48: Chapter 6: Conclusions and Recommen
Page 49 and 50: • Perform a full system analysis
Page 51 and 52: Appendix A Procedure for Arc-Flash
Page 53 and 54: Appendix B Arc-Flash Analyzer Verif
Page 55 and 56: elow System Voltage Fault Current A
Page 57 and 58: % Update handles structure guidata(
Page 59 and 60: % See ISPC and COMPUTER. if ispc se
Page 61 and 62: else set(hObject,'BackgroundColor',
Page 63 and 64: % str2double(get(hObject,'String'))
Page 65 and 66: C.1 System Online Diagram Appendix
Page 67 and 68: C.5 Relay Data Table C.4: Example s
Page 69 and 70: Bus = Bus 3 138kV Equipment categor
Page 71 and 72: Breaker interrupting time (cycles)
Page 73 and 74: D.2 PPE Levels Required Substation
Page 75 and 76: Breaker interrupting time (cycles)
Page 77 and 78:
Interrupting device = [OC relay] Sy
Page 79 and 80:
Appendix F Energy Plot Data Table F
Page 81 and 82:
87 0.090393103 0.36157241 0.9039310
Page 83 and 84:
2.722222222 45.4311525 181.7246 454
Page 85 and 86:
5.277777778 170.767831 683.0713 170
Page 87 and 88:
7.833333333 376.180721 1504.723 376
Page 89 and 90:
10.38888889 661.669821 2646.679 661
Page 91 and 92:
12.94444444 1027.23513 4108.941 102
Page 93 and 94:
2.138888889 12.2298446 48.91938 122
Page 95 and 96:
4.694444444 28.1962506 112.785 281.
Page 97 and 98:
7.25 44.7470866 178.9883 447.4709 9
Page 99 and 100:
9.805555556 61.6752248 246.7009 616
Page 101 and 102:
12.36111111 78.8850842 315.5403 788
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