A satisfactory Vref step response, by itself, does not establish that the Power System Stabilizer is adequately tuned. QAPSS evaluates PSS performance across the relevant oscillation frequencies using analytical assessment and dynamic studies.
Discuss Your AVR / PSS ProblemRotor swings?
Sub-synchronous torsional interactions?
Renewable-related interactions?
Interactions with nearby FACTS or HVDC controls?
AVR, PSS or other control interactions?
An oscillation is an observation. The engineering task is to understand its mechanism, isolate the contributing factors and determine what needs to be done.
Whatever the problem requires.
Concerned with the stability of an evolving power system — particularly large-scale renewable integration? Evaluating network or compensation alternatives? Concerned about possible SSR/SSTI implications? Facing modelling limitations?
Could a proposed network addition, generation change or planning strategy reduce damping or introduce new dynamic interactions?
When standard models are not adequate, QAPSS can develop User-Defined Models and customised modelling solutions.
Assess competing technical options and their dynamic consequences before implementation.
Do you want to independently cross-check a proposed solution before implementation? Unsure about assumptions, modelling, study methodology or conclusions? Want an alternative approach examined?
Load Flow Studies · Short-Circuit Studies · Transient Stability · Small-Signal Stability · Renewable Integration · Contingency Analysis · Dynamic Modelling · Grid-Integration Studies
What is oscillating? At what frequency? Is it adequately damped? What is causing it? Could it become a risk under another operating condition?
Routine studies are part of our work. But difficult problems interest us more — especially those without an obvious explanation, where conventional analysis has not provided a satisfactory answer.