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Simple method of fast discharge of capacitor banks using delta connected transformers: modelling and experimental testing

journal contribution
posted on 2023-05-18, 17:09 authored by Fracalossi, DA, Md Enamul Haque, Davies, M
The discharge of capacitor banks at substations is necessary before their connection to the grid can occur. This study investigates the use of delta-connected transformers for capacitor discharge. The energy from the capacitor banks is discharged by driving the transformers into saturation after disconnection from the grid. To investigate this, simulations were conducted in PSCAD to identify the relationship between the size of the transformer, the size of discharge resistor and the time taken for the capacitor bank to discharge. To confirm the accuracy of the PSCAD simulations, a scaled physical model was constructed in the laboratory and discharge results were recorded. A PSCAD simulation of the scaled model was also created to directly compare the accuracy of PSCAD. It was found that PSCAD produced accurate representations of the laboratory model, resulting in a greater confidence in the full-scale results.

History

Publication title

IET Generation, Transmission and Distribution

Volume

9

Issue

14

Pagination

1946-1953

ISSN

1751-8687

Department/School

School of Engineering

Publisher

The Institution of Engineering and Technology

Place of publication

United Kingdom

Rights statement

Copyright 2015 The Institution of Engineering and Technology

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the environmental sciences

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