Recently, the State Grid Shanxi Electric Power Company Organization of a science and technology project "to consider distributed power access grid fault recovery method" based on the distribution characteristics of Shanxi Province power point, a prospective study of distributed power self-starting features and their participation The key technical requirements related to the black-start of power grids have filled in the gaps at home and abroad about the participation of fluctuating distributed power supply in grid fault recovery and the related research results have reached the international advanced level.
Distributed power with fast start-up, flexible control, widely distributed and other characteristics for the grid to provide more power options. However, most of the power supplies connected to Shanxi Power Grid are thermal power units, which have few hydropower and small selection. Or they can only rely on the incoming power of the external network as the recovery power, and the recovery path is long and easy to cause great pressure on the dispatching of adjacent power grids. Taking a local power grid in Shanxi Province as an example, this study proposes an improved V / f control algorithm for wind farm self-starting and an improved droop control algorithm for photovoltaic system self-starting through simulation modeling. A distributed power supply Black start technical conditions and general principles of power grid, put forward the use of distributed power plant thermal power plant to restore black start strategy.
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