Local Area Protection for Renewable Energy

The local renewable energy protection is of great theoretical value and practical significance in ensuring the safe and reliable operation of power grids with large‐scale renewable sources. In order to solve the problems of the protection of renewable energy integrated in the grid, this chapter analyses in depth the fault characteristics of renewable energy sources, centralized renewable energy protection and distributed renewable energy protection. It proposes a current differential protection scheme for the outgoing transmission line based on fault steady‐state components, which is not affected by fault resistance or load current, and is highly reliable and sensitive in fault identification. The chapter further introduces an adaptive protection approach for distribution networks containing distributed generation, which can eliminate the influence of distributed generation (DG) on the branch current and increase the protection range of the main protection and backup protection.