Ukraine Power System Support Project (UPSS) – Steady State Analysis of 2015/2016 Winter Peak Regimes and Training (Phase IV)

The first and second phases of the project included an emergency network study that assessed the high voltage transmission network’s stability in response to curtailed gas and coal fueled electric power generation and an anticipated increase in demand for electricity resulting from consumers switching to electric resistance heating from municipally supplied heat produced by combined heat and power plants. A steady state load flow analysis of nine scenarios involving varying assumptions on fuel supply, electricity demand, and regional interconnections was conducted. The analysis yielded recommendations for a hierarchy of remedial actions to be taken by network dispatchers in response to voltage and frequency instability caused by lack of generation capacity and damage to the network in the conflict zone.

The load flow analysis conducted in Phase I for the winter of 2014-2015 identified critical network control points and generation units, instability of which could threaten the overall security of the Ukrainian high voltage network. A stability analysis performed in Phase II for the same period examined these critical network points and recommended remedial mitigation actions. The third phase of the project examined the static and dynamic stability of the network for the summer peak and off peak regimes during the Ukrenergo network maintenance schedule.

This fourth phase of the UPSSP supported steady state analysis for the winter 2015-2016 maximum load regime to identify potential areas of network instability resulting the changes in network topology in the conflict zone of Eastern Ukraine and potential curtailments of coal and natural gas.

In parallel with previous, PSS/E Dynamic Stability Training for Ukrenergo was conducted with the focus on stability aspects of the process of the Ukraine Power System connection to ENTSO-E.

Type of services provided:

• Scenario simulation models creation
• Load Flow analysis with network element loadings for non-contingency status
• Voltage profile analysis of transmission network for non-contingency status
• Contingency analysis (N-1)
• Recommendations for a hierarchy of remedial actions.