Coordinated planning of large-scale wind farm integration system and regional transmission network considering static voltage stability constraints

• A coordinated model of wind farm integration system planning and TEP is proposed.
• The model considers a static voltage stability criterion of wind farm clusters.
• Scenario-based transmission planning considering nodal impedance matrix is formulated.
• Raster map and disjunctive inequalities are applied to linearize the model.
• Tests proved validity and rationality of the proposed coordinated planning method.

The incoordination between centralized wind power development and transmission planning is the main cause of wind power curtailment. Moreover, engineering practice shows that voltage issue may trigger large-scale tripping-offline contingency of wind turbines. With the objective of optimum economy, a coordinated planning method of large-scale wind farm integration system and relevant regional transmission network was proposed considering static voltage stability in this paper. A practical criterion of static voltage stability was formulated as operational constraints in the proposed model to ensure the obtained scheme to be technically and economically optimal. Raster map and disjunctive inequalities were introduced to linearize the model such that the model can be solved by mixed integer linear programming solvers directly. Numerical simulations show the validity and rationality of the proposed coordinated planning method.