Coordinated Planning of Grid-connected Wind Farms and Grid Expansion Considering Uncertainty of Wind Generation

When large-scale wind farms are connected to the power grid, the location and mode of access have a great impact on the operation and planning of the regional power grid. In addition to the randomness and fluctuation of wind power generation, traditional deterministic and independent planning is no longer fully applicable. The uncertainty of renewable energy resources was concerned in this paper. On the basis of typical days, the scenario method was used for stochastic optimization. The coordinated planning of grid-connected wind farms and grid expansion considering the uncertainty of wind power generation was proposed, with the objective to minimize the sum of construction cost, operation cost and penalty cost of curtailing wind. The effectiveness of the planning model was verified by system simulation using Belgian wind power data.