Day-Ahead Corrective Adjustment of FACTS Reactance: A Linear Programming Approach
Day-Ahead Corrective Adjustment of FACTS Reactance: A Linear Programming Approach
复制标题
FACTS 电抗的日前修正调整：线性规划方法
DOI：
10.1109/tpwrs.2015.2475700
复制
发表时间：
2016
影响因子：
6.6
通讯作者：
K. Hedman
中科院分区：
文献类型：
--
作者：
M. Sahraei;K. Hedman
备用需求作为一个代理的N-1可靠性的安全约束机组组合（SCUC）问题。然而，不能保证准备金在所有情况下都可交付（应急后状态）。一种提高储量输送能力的廉价方法是利用输电网络的灵活性。柔性交流输电系统（FACTS）装置能够显著提高输电能力。然而，FACTS的利用率是有限的，今天由于这些设备的复杂性，介绍了直流最优潮流问题（DCOPF）。在线性目标下，传统的DCOPF是线性规划（LP）;当考虑基于可变阻抗的FACTS设备时，问题变成非线性规划（NLP）。本文提出了一种将自然线性规划转化为混合整数线性规划的方法，用于FACTS装置的日前校正操作。然后引入工程洞察力以进一步降低LP的复杂性。虽然不能保证最优性，IEEE 118节点系统的仿真研究表明，该方法找到全局最优解的情况下，在98.8%。即使当该方法没有找到最优解时，它也能够收敛到接近最优解，这大大提高了可靠性，非常快。
Reserve requirements serve as a proxy for N-1 reliability in the security-constrained unit commitment (SCUC) problem. However, there is no guarantee that the reserve is deliverable for all scenarios (post-contingency states). One cheap way to improve reserve deliverability is to harness the flexibility of the transmission network. Flexible AC transmission system (FACTS) devices are able to significantly improve the transfer capability. However, FACTS utilization is limited today due to the complexities these devices introduce to the DC optimal power flow problem (DCOPF). With a linear objective, the traditional DCOPF is a linear program (LP); when variable impedance based FACTS devices are taken into consideration, the problem becomes a nonlinear program (NLP). A reformulation of the NLP to a mixed integer linear program, for day-ahead corrective operation of FACTS devices, is presented in this paper. Engineering insight is then introduced to further reduce the complexity to an LP. Although optimality is not guaranteed, the simulation studies on the IEEE 118-bus system show that the method finds the globally optimal solution in 98.8% of the cases. Even when the method did not find the optimal solution, it was able to converge to a near-optimal solution, which substantially improved the reliability, very quickly.