Experiment Specification 01.01.01

Control of voltage with an on-load tap change controller

Experiment Specification Definition

ID

01.01.01

Reference to Test Specification

01

Title of Experiment

Control of voltage with an on-load tap change controller

Research Infrastructure

UDEX

Experiment Realisation

The combination of the OLTC and the conventional transformer is called a "smart-transformer". The test is carried out with real components in a real network with no simulation required.

During the test, drops and overvoltages would be applied by instantaneously connecting and disconnecting parts of the grid components where the smart-transformer is connected, while at its output the physical quantities would be measured to check that they comply with the required setpoint previously configured.

Experiment Setup (concrete lab equipment)

Specific lab equipment includes:

  • Medium voltage distribution network cable infrastructure
  • Generator.
  • OLTC
  • Transformers.
  • Automated switchgear with RTUs.
  • Controllable loads
  • Communication facilities
Experimental Design and Justification

The experiment requires the use of a real controllable network environment and so justifies the use of the UDEX infrastructure.

The open possibilities of different grid voltages ranging from 0-36KV to demonstrate the objectives set out for this experiment, with a flexibility in the grid configuration providing flexibility in the load and generation characteristics requires a laboratory infrastructure such as the UDEX.

Precision of equipment and measurement uncertainty

System uncertainty <5%

Storage of experiment data

Experimental data is collated locally in files for posterior analysis if required.