论文标题
凸的放松AC最佳功率流的柔性传输线阻抗
Convex Relaxation of AC Optimal Power Flow with Flexible Transmission Line Impedances
论文作者
论文摘要
一方面，灵活的传输线阻抗是一种有希望的控制资源，可促进网格灵活性，但另一方面为相关的优化问题增加了很多复杂性。本文开发了一种具有柔性线阻抗的交流最佳功率流的凸化方法。首先，发现柔性阻抗线等同于恒定阻力线，该线路连接了一对具有相关且连续可调的TAP比率的变压器。然后，使用该电路等效，在现有的凸松弛框架下将原始优化问题重新归入了半明确计划，该框架以易于实现的方式改善了解决方案的易处理性和最佳性。通过对IEEE 118-BUS系统的数值测试来验证所提出的方法。
Flexible transmission line impedances on one hand are a promising control resource for facilitating grid flexibility, but on the other hand add much complexity to the concerned optimization problems. This paper develops a convexification method for the AC optimal power flow with flexible line impedances. First, it is discovered that a flexible-impedance line is equivalent to a constant-impedance line linking a pair of transformers with correlated and continuously adjustable tap ratios. Then, with this circuit equivalent, the original optimization problem is reformulated into a semi-definite program under the existing convex relaxation framework, which improves the solution tractability and optimality in an easy-to-implement manner. The proposed method is verified by numerical tests on the IEEE 118-bus system.
