Transmission transformer tap changer optimisation while minimising system losses using security unconstrained Optimal Power Flow (OPF) techniques
This dissertation investigates the feasibility of fixed tap or reduced tap transformers on the Eskom Transmission system, thereby reducing transformer failures and reducing the cost of new or replacement transformers. The main analysis uses Optimal Power Flow (OPF) techniques based on a Siemens P...
| Main Author: | |
|---|---|
| Format: | Others |
| Language: | en |
| Published: |
2012
|
| Online Access: | http://hdl.handle.net/10539/11632 |
| Summary: | This dissertation investigates the feasibility of fixed tap or reduced tap transformers on the
Eskom Transmission system, thereby reducing transformer failures and reducing the cost of
new or replacement transformers.
The main analysis uses Optimal Power Flow (OPF) techniques based on a Siemens PSS/E
software platform and a minimum system loss operating point or objective function while
reducing tap movements and maintaining prudent system limits but allowing shunt VAr
devices to freely compensate for the reduced tapping. Various years and system conditions
are analysed.Finally it is shown that replacing some Transmission transformers with fixed-tap transformers
is a more cost effective solution.
The contribution of this research is two-fold:
1. to show that there is scope for Eskom System Operations to operate its system more
efficiently in terms of system losses
2. to show that an OPF methodology is a practical technique to limit transformer tap
movements and allow optimal VAr placement while minimising system losses |
|---|