pof_transformer_30_60kv: Current Probability of Failure for 30/10kV and 60/10kV Transformers

Description

This function calculates the current annual probability of failure for 30/10kV and 60/10kV transformers. The function is a cubic curve that is based on the first three terms of the Taylor series for an exponential function.

Usage

pof_transformer_30_60kv(
  transformer_type = "60kV Transformer (GM)",
  year_of_manufacture,
  utilisation_pct = "Default",
  no_taps = "Default",
  placement = "Default",
  altitude_m = "Default",
  distance_from_coast_km = "Default",
  corrosion_category_index = "Default",
  age_tf,
  age_tc,
  partial_discharge_tf = "Default",
  partial_discharge_tc = "Default",
  temperature_reading = "Default",
  main_tank = "Default",
  coolers_radiator = "Default",
  bushings = "Default",
  kiosk = "Default",
  cable_boxes = "Default",
  external_tap = "Default",
  internal_tap = "Default",
  mechnism_cond = "Default",
  diverter_contacts = "Default",
  diverter_braids = "Default",
  moisture = "Default",
  acidity = "Default",
  bd_strength = "Default",
  hydrogen = "Default",
  methane = "Default",
  ethylene = "Default",
  ethane = "Default",
  acetylene = "Default",
  hydrogen_pre = "Default",
  methane_pre = "Default",
  ethylene_pre = "Default",
  ethane_pre = "Default",
  acetylene_pre = "Default",
  furfuraldehyde = "Default",
  reliability_factor = "Default",
  k_value = 0.454,
  c_value = 1.087,
  normal_expected_life_tf = "Default",
  normal_expected_life_tc = "Default"
)

Value

DataFrame Current probability of failure per annum per kilometer along with current health score.

Arguments

transformer_type: String. A sting that refers to the specific asset category. Options: transformer_type = c("30kV Transformer (GM)", "60kV Transformer (GM)"). The default setting is transformer_type = "60kV Transformer (GM)"
year_of_manufacture: Numeric. Normal expected life depends on the year for manufacture.
utilisation_pct: Numeric. The max percentage of utilisation under normal operating conditions.
no_taps: Numeric. Average number of daily taps (tapchanger).
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. 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. 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_tf: Numeric. The current age in years of the transformer.
age_tc: Numeric. The current age in years of the tapchanger
partial_discharge_tf: String. Indicating the level of partial discharge in the transformer. Options: partial_discharge_tf = c("Low", "Medium", "High (Not Confirmed)", "High (Confirmed)", "Default").
partial_discharge_tc: String. Indicating the level of partial discharge in the tapchanger Options: partial_discharge_tc = c("Low", "Medium", "High (Not Confirmed)", "High (Confirmed)", "Default").
temperature_reading: String. Indicating the criticality. Options: temperature_reading = c("Normal", "Moderately High", "Very High", "Default").
main_tank: String. Indicating the observed condition of the main tank. Options: main_tank = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
coolers_radiator: String. Indicating the observed condition of the coolers/radiators. Options: coolers_radiator = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
bushings: String. Indicating the observed condition of the bushings. Options: bushings = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default").
kiosk: String. Indicating the observed condition of the kiosk. Options: kiosk = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default").
cable_boxes: String. Indicating the observed condition of the cable boxes. Options: cable_boxes = c("No Deterioration","Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default").
external_tap: String. Indicating the observed external condition of the tapchanger. Options: external_tap = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
internal_tap: String. Indicating the observed internal condition of the tapchanger. Options: external_tap = c("Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
mechnism_cond: String. Indicating the observed condition of the drive mechnism. Options: mechnism_cond = c("No deterioration", "Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
diverter_contacts: String. Indicating the observed condition of the selector and diverter contacts. Options: diverter_contacts = c("No deterioration", "Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default"). in CNAIM (2021).
diverter_braids: String. Indicating the observed condition of the selector and diverter braids. Options: diverter_braids = c("No deterioration", "Superficial/minor deterioration", "Some Deterioration", "Substantial Deterioration", "Default").
moisture: Numeric. the amount of moisture given in (ppm) See page 162, table 203 in CNAIM (2021).
acidity: Numeric. the amount of acidicy given in (mg KOH/g) See page 162, table 204 in CNAIM (2021).
bd_strength: Numeric. the amount of breakdown strength given in (kV) See page 162, table 205 in CNAIM (2021).
hydrogen: Numeric. Refers to the hydrogen level in the transformer oil. Hydrogen levels are measured in ppm. A setting of "Default" will result in the best possible result.
methane: Numeric. Refers to the methane level in the transformer oil. Methane levels are measured in ppm. A setting of "Default" will result in the best possible result.
ethylene: Numeric. Refers to the ethylene level in the transformer oil. Ethylene levels are measured in ppm. A setting of "Default" will result in the best possible result.
ethane: Numeric. Refers to the ethane level in the transformer oil. Ethane levels are measured in ppm. A setting of "Default" will result in the best possible result.
acetylene: Numeric. Refers to the acetylene level in the transformer oil. Acetylene levels are measured in ppm. A setting of "Default" will result in the best possible result.
hydrogen_pre: Numeric. Previous results. A setting of "Default" will result in the best possible result.
methane_pre: Numeric. Previous results. A setting of "Default" will result in the best possible result.
ethylene_pre: Numeric. Previous results. A setting of "Default" will result in the best possible result.
ethane_pre: Numeric. Previous results. A setting of "Default" will result in the best possible result.
acetylene_pre: Numeric. Previous results. A setting of "Default" will result in the best possible result.
furfuraldehyde: Numeric. Refers to the furfuraldehyde level in the transformer oil. furfuraldehyde levels are measured in ppm. A setting of "Default" will result in the best possible result.
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).
k_value: Numeric. k_value = "0.0454" by default. This number is given in a percentage. The default value is accordingly to the CNAIM standard on p. 110.
c_value: Numeric. c_value = 1.087 by default. The default value is accordingly to the CNAIM standard see page 110
normal_expected_life_tf: Numeric. normal_expected_life_tf = "Default" by default. The default value is accordingly to the CNAIM standard on page 107.
normal_expected_life_tc: Numeric. normal_expected_life_tc = "Default" by default. The default value is accordingly to the CNAIM standard on page 107.

Examples

Run this code

# Current probability of failure for a 60/10kV transformer
pof_transformer_30_60kv(transformer_type = "60kV Transformer (GM)",
year_of_manufacture = 1980,
utilisation_pct = "Default",
no_taps = "Default",
placement = "Default",
altitude_m = "Default",
distance_from_coast_km = "Default",
corrosion_category_index = "Default",
age_tf = 43,
age_tc = 43,
partial_discharge_tf = "Default",
partial_discharge_tc = "Default",
temperature_reading = "Default",
main_tank = "Default",
coolers_radiator = "Default",
bushings = "Default",
kiosk = "Default",
cable_boxes = "Default",
external_tap = "Default",
internal_tap = "Default",
mechnism_cond = "Default",
diverter_contacts = "Default",
diverter_braids = "Default",
moisture = "Default",
acidity = "Default",
bd_strength = "Default",
hydrogen = "Default",
methane = "Default",
ethylene = "Default",
ethane = "Default",
acetylene = "Default",
hydrogen_pre = "Default",
methane_pre = "Default",
ethylene_pre = "Default",
ethane_pre = "Default",
acetylene_pre = "Default",
furfuraldehyde = "Default",
reliability_factor = "Default",
k_value = 0.454,
c_value = 1.087,
normal_expected_life_tf = "Default",
normal_expected_life_tc = "Default")

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