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Voltage Regulation

Calculates voltage drop, voltage regulation, receiving-end voltage, and real power loss for a balanced three-phase line. The reduced method uses per-kilometre R and X, line length, real and reactive load, and sending-end voltage.

inputs

6 fields

context

2 archetypes

engine

with-tool

outputs

4 scored fields

contract fields

Parameter Map

6 inputs to 4 scored outputs

  • line_resistance_ohm_per_km

    float

    Positive-sequence line resistance

    0 to 5ohm/km

  • line_reactance_ohm_per_km

    float

    Positive-sequence line reactance

    0 to 5ohm/km

  • line_length_km

    float

    Line length

    0.1 to 500km

  • load_real_power_mw

    float

    Three-phase real load

    0.1 to 1000MW

  • load_reactive_power_mvar

    floathidden in hard

    Three-phase reactive load

    -500 to 500MVAr

  • sending_voltage_kv

    float

    Sending-end line-to-line voltage

    1 to 765kV
voltage_drop_kvtol 0.03

Approximate line voltage drop

voltage_regulation_pcttol 0.03

Voltage drop as a percentage of sending voltage

receiving_end_voltage_kvtol 0.03

Receiving-end line-to-line voltage

power_loss_mwtol 0.03

Three-phase real power loss

visibility contract

Difficulty Ladder

all_giveneasy

Subtransmission line with all values visible

all fields visible
all_givenmedium

Subtransmission or transmission line

all fields visible
partialhard

Reactive load hidden in power factor context

load_reactive_power_mvar

scenario bands

Archetype Atlas

subtransmission_line

2 contexts

Subtransmission feeder supplying a regional load

line_resistance_ohm_per_km0.05 to 0.4
line_reactance_ohm_per_km0.1 to 0.6
line_length_km5 to 100
load_real_power_mw5 to 100

regional-feeder / subtransmission-line

transmission_line

2 contexts

Transmission line supplying a bulk load

line_resistance_ohm_per_km0.01 to 0.15
line_reactance_ohm_per_km0.1 to 0.5
line_length_km50 to 300
load_real_power_mw50 to 600

bulk-transmission / interconnector

rendered task

Generation Preview

bulk-transmission-transmission-line-preview

difficulty
hard
visibility
partial
archetype
transmission_line
site context
bulk-transmission
instruction excerptvoltage-regulation_calc.py

visible fields

  • line_resistance_ohm_per_km0.01 to 0.15 ohm/km
  • line_reactance_ohm_per_km0.1 to 0.5 ohm/km
  • line_length_km50 to 300 km
  • load_real_power_mw50 to 600 MW
  • sending_voltage_kv132 to 500 kV

withheld schema

load_reactive_power_mvarvoltage_drop_kvvoltage_regulation_pctreceiving_end_voltage_kvpower_loss_mw
Transmission line supplying a bulk load. bulk-transmission. Required outputs: voltage_drop_kv, voltage_regulation_pct, receiving_end_voltage_kv, power_loss_mw