考虑联络线传输功率的双层分区多目标输电网规划

Bi-level Multi-objective Transmission Planning With Consideration of Tie-line Power Transfer Capability

为提高区域电网联络线的输电能力,最大范围优化资源分配,建立考虑经济性、可靠性指标的基于电网分区的双层多目标输电网规划模型。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。下层规划在此方案基础上,以最大负荷供应能力指标指导受端电网规划并突出其受电和负荷增长特性;得到的规划方案再次传递到上层模型,由此反复交替进行直至获取满意的优化方案。提出应用粗糙集理论优势类函数和劣势类函数评价各子目标备选方案的相对排序指标,得到综合评价值进行多目标优化方案选择。46和77节点系统算例验证了该模型和方法的有效性。

To improve the tie-line transmission capacity between regional power networks and optimize resource distribution to the maximum extent, a novel bi-level multi-objective power transmission planning model was established based on power network partition, with consideration of its economic and reliability aspects. 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. The objective of the slave programming was to maximize the load supply capability so as to meet electricity consumption in receiving-end grid and its best planning result would be sent to the master programming model. Such process was repeated until the global optimal solution was found. Rough set theory was introduced to evaluate multi-objective index rank with its dominant function and inferiority function. The three test systems were analyzed and showed the validity of the proposed model and method.