Three-stage power system restoration methodology considering renewable energies

- Define three load restoration stages according to status of power system restoration process.
- In each load restoration stage, a load restoration methodology is developed to achieve the goal functions and satisfy the operational constraints.
- A novel algorithm is proposed based on fuzzy system to determine the energizing sequence of the network skeleton.
- Determine the negative/positive spinning reserve power by considering the renewable energy.
- Determine the minimal/maximal restorable load by considering generator start-up sequence.

This is a study of a combined load restoration and generator start-up procedure. The procedure is structured into three stages according to the power system status and the goal of load restoration. Moreover, for each load restoration stage, the proposed algorithm determines a load restoration sequence by considering renewable energy such as solar and wind park to achieve objective functions. The validity and performance of the proposed algorithm is demonstrated through simulations using IEEE-39 network.