A Transmission System Planning Method Considering Risk Volatility and Capability of Accommodating Wind Power

The ever-increasing penetration of wind power has resulted in new problems and challenges to the secure and economic operation of the power system concerned. Given this background, a bi-level transmission system planning model for this purpose is proposed. In the upper level, the objective is to maximize the generating quantity from wind farms by per unit transmission investment within a given time period, the attained transmission planning scheme will be transferred to the lower level. In the lower level, the objective is to minimize the sum of load shedding energy and abandoned wind energy within a given time period, the load shedding punishment, abandoned wind punishment and wind farm energy are transferred to the upper level as feedback. These two levels are implemented interactively and iteratively. Finally, the essential features of the developed model and adopted algorithms are demonstrated by a modified 18-bus test system.