pof_poles {CNAIM}R Documentation

Current Probability of Failure for Poles

Description

This function calculates the current annual probability of failure per kilometer Poles The function is a cubic curve that is based on the first three terms of the Taylor series for an exponential function. For more information about the probability of failure function see section 6 on page 30 in CNAIM (2017).

Usage

pof_poles(
  pole_asset_category = "20kV Poles",
  sub_division = "Wood",
  placement = "Default",
  altitude_m = "Default",
  distance_from_coast_km = "Default",
  corrosion_category_index = "Default",
  age,
  measured_condition_inputs,
  observed_condition_inputs,
  reliability_factor = "Default"
)

Arguments

pole_asset_category

String The type of asset category

sub_division

String. Refers to material the pole is made of.

placement

String. Specify if the asset is located outdoor or indoor.

altitude_m

Numeric. Specify the altitude location for the asset measured in meters from sea level.altitude_m is used to derive the altitude factor. See page 107, table 23 in CNAIM (2017). A setting of "Default" will set the altitude factor to 1 independent of asset_type.

distance_from_coast_km

Numeric. Specify the distance from the coast measured in kilometers. distance_from_coast_km is used to derive the distance from coast factor See page 106, table 22 in CNAIM (2017). A setting of "Default" will set the distance from coast factor to 1 independent of asset_type.

corrosion_category_index

Integer. Specify the corrosion index category, 1-5.

age

Numeric. The current age in years of the conductor.

measured_condition_inputs

Named list observed_conditions_input

observed_condition_inputs

Named list observed_conditions_input conductor_samp = c("Low","Medium/Normal","High","Default"). See page 146-147, table 192 and 194 in CNAIM (2017).

reliability_factor

Numeric. reliability_factor shall have a value between 0.6 and 1.5. A setting of "Default" sets the reliability_factor to 1. See section 6.14 on page 69 in CNAIM (2017).

Value

Numeric. Current probability of failure per annum per kilometer.

Source

DNO Common Network Asset Indices Methodology (CNAIM), Health & Criticality - Version 1.1, 2017: https://www.ofgem.gov.uk/system/files/docs/2017/05/dno_common_network_asset_indices_methodology_v1.1.pdf

Examples

# Current annual probability of failure for HV Poles
pof_poles(
pole_asset_category = "20kV Poles",
sub_division = "Wood",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age = 10,
observed_condition_inputs =
list("visual_pole_cond" =
list("Condition Criteria: Pole Top Rot Present?" = "Default"),
"pole_leaning" = list("Condition Criteria: Pole Leaning?" = "Default"),
"bird_animal_damage" =
list("Condition Criteria: Bird/Animal Damage?" = "Default"),
"top_rot"  = list("Condition Criteria: Pole Top Rot Present?" = "Default")),
measured_condition_inputs =
list("pole_decay" =
list("Condition Criteria: Degree of Decay/Deterioration" = "Default")),
reliability_factor = "Default")

[Package CNAIM version 1.0.1 Index]