Minimum Distribution System Concepts and Applications

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Example MDS Analysis Results Poles, Transformers, and Conductors Customer Demand Poles • Wood 66.4% 33.6% • Concrete 47.3% 52.7% • Steel 57.5% 42.5% Transformers • 1Φ OH* 41.7% 58.3% • 1Φ UG** 61.5% 38.5% • 3Φ UG** 34.2% 65.8% Customer Demand Conductors Primary • Bare ACSR OH 21.0% 79.0% • 15 kV CN UG* 57.4% 42.6% Secondary • WP AL OH 38.4% 61.6% • Duplex OH 31.4% 68.6% • 1-Conductor UG* 60.7% 39.3% * Basis for classifying transformer vaults ** Basis for classifying transformer pads * Basis for classifying conduit 44
Example MDS Analysis Results Distribution Line Devices Primary Secondary Customer Demand Customer Demand Regulators & Capacitors 100% Reclosers and Sectionalizers 100% Cutouts & Arresters • Line Transformers (OH) 41.7% 58.3% • Regulators & Capacitors 100% • Reclosers & Sectionalizers 100% • Line Protection 100% Bypass Switches • Regulators 100% • Reclosers & Sectionalizers 100% OH Line Switches* 21.0% 79.0% UG Line Switches* 57.4% 42.6% * Based on conductors 45
Page 1 and 2: MINIMUM DISTRIBUTION SYSTEM CONCEPT
Page 3 and 4: Basic Cost Components The classific
Page 5 and 6: The Access Function Of The Distribu
Page 7 and 8: Distribution System Lines and Facil
Page 9 and 10: Customer or Demand 9
Page 11 and 12: Customer or Demand 11
Page 13 and 14: Protection Scheme Permanent Fault C
Page 15 and 16: Customer or Demand
Page 17 and 18: Zero-Intercept Methodology Applied
Page 19 and 20: Weighted Linear Regression For Dist
Page 21 and 22: Zero-Intercept Analysis The Problem
Page 23 and 24: Primary and Secondary Conductors an
Page 25 and 26: Weighted Linear Regression For Dist
Page 27 and 28: Determination Of Overhead Circuit L
Page 29 and 30: CONDUIT FOR UNDERGROUND CABLES RIGI
Page 31 and 32: Pole Heights Relative Frequency Dis
Page 33 and 34: Clearance Requirements Poles lines
Page 35 and 36: Distribution Pole Classification Co
Page 37 and 38: Standard Pole Classes Example: 35
Page 39 and 40: Pole Class Requirements Based On Tr
Page 41 and 42: Pole Capacity Poles have no electri
Page 43: Zero-Intercept Example Wood Poles 1

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