duty_factor_transformer_33_66kv {CNAIM}

Duty Factor for 33/10kV and 66/10kV Transformers and Tapchanger

Description

This function calculates the duty factor for 33/10kV and 66/10kV transformers depending on the maximum percentage utilisation under normal operating conditions. And the tapchanger depending on the average number of daily taps. The duty factor is used in the derivation of the expected life of an asset. See e.g. expected_life(). For more general information about the derivation of the duty factor see section 6.6 on page 51 in CNAIM (2021)

Usage

duty_factor_transformer_33_66kv(
  utilisation_pct = "Default",
  no_taps = "Default"
)

Arguments

utilisation_pct

Numeric. The max percentage of utilisation under normal operating conditions.

no_taps

Numeric. Average number of daily taps (tapchanger).

Value

Data table. Duty factor for the transformer and for the tapcharger

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

duty_factor_transformer_33_66kv(utilisation_pct = 95,
no_taps = 25)