pof_future_poles: Future Probability of Failure for Poles

In CNAIM: Common Network Asset Indices Methodology (CNAIM)

Future Probability of Failure for Poles

Description

This function calculates the future annual probability of failure per kilometer for a 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 34 in CNAIM (2021).

Usage

pof_future_poles(
  pole_asset_category = "20kV Poles",
  sub_division = "Wood",
  placement = "Default",
  altitude_m = "Default",
  distance_from_coast_km = "Default",
  corrosion_category_index = "Default",
  age,
  pole_decay = "default",
  observed_condition_inputs,
  reliability_factor = "Default",
  simulation_end_year = 100
)

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 111, table 23 in CNAIM (2021). 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 110, table 22 in CNAIM (2021). 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.
pole_decay	Numeric Pole Decay
observed_condition_inputs	Named list observed_conditions_input conductor_samp = c("Low","Medium/Normal","High","Default"). See page 161, table 199 and 201 in CNAIM (2021).
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 73 in CNAIM (2021).
simulation_end_year	Numeric. The last year of simulating probability of failure. Default is 100.

Value

Numeric array. Future probability of failure per annum per kilometre for poles.

Source

DNO Common Network Asset Indices Methodology (CNAIM), Health & Criticality - Version 2.1, 2021: https://www.ofgem.gov.uk/sites/default/files/docs/2021/04/dno_common_network_asset_indices_methodology_v2.1_final_01-04-2021.pdf

Examples

# Future annual probability of failure for HV Poles
pof_future_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")),
pole_decay = "Default",
reliability_factor = "Default",
simulation_end_year = 100)

CNAIM documentation built on Aug. 31, 2022, 9:13 a.m.