In contrast to traditional synchronous generators, variable speed wind turbines (VSWTs) usually do not provide inertia response to the power system in case of power imbalance. Thus, in a power system with high penetration of wind power, there may be a high risk of lack of inertia response in the system. This may lead to frequency instability or blackout when the power system is subject to a large disturbance. The aim of this project is first to evaluate the inertia available from VSWTs. Then, the risk of low inertia is estimated using a probabilistic approach in a wind dominant power system. Two solutions to provide additional inertia response and to reduce the risk of low system inertia are evaluated: 1) VSWTs with de-rated operation; 2) VSWTs equipped with energy storage on the DC-link. This energy storage could be super-capacitors, batteries or a combination of both. Finally, the economic value to provide such an inertia response will be evaluated based on a cost/benefit analysis.
The project is closed: 30/04/2017