The master programming model aimed to minimize both construction cost and load curtailment, and maximize tie-line transfer capacity.The optimal result was sent to the slave programming model.

• 上层规划模型对全网采用线路建设成本最小、联络线传输功率最大和最小切负荷量作为优化目标进行网络优化，搜索到的优化方案传递给下层规划模型。