| Abstract [eng] |
This master’s thesis investigates the impact of wind energy integration on the short-term dynamic stability of an IEEE-39 bus system and evaluates the effectiveness of a synchronous compensator as a stability enhancement measure. The study was conducted using „PSS/E“ software, simulating three-phase short-circuit and power imbalance disturbances caused by generator tripping. The rotor angle, frequency nadir, rate of frequency change, and voltage indicators were analyzed in five simulated scenarios. It was found that as the integration of wind power plants increases, system inertia decreases, leading to increased fluctuations in rate of frequency change and rotor angle. Connecting a synchronous compensator improved all dynamic stability indicators, and its effect increased proportionally to the level of wind generation. Sensitivity studies of the synchronous compensator revealed that increasing the rated power is the most effective parameter of the compensator. Increasing the inertia constant improves the rate of frequency change, but worsens the frequency nadir value due to the delayed activation of the speed governor. Placing the compensator close to the fault location is more beneficial for reducing the rate of frequency change and the rotor angle, but a distant placement is beneficial for improving the frequency nadir value. An investigation of the number of compensators showed that the greatest individual improvement is achieved in a system with two synchronous compensators. |
