论文标题
电池集成电网的AC-OPF问题的精确放松
An exact relaxation of AC-OPF problem for battery-integrated power grids
论文作者
论文摘要
可再生能源资源和电力电子交换负载在分销网络中引入快速动态。这些动态不能通过缓慢的常规解决方案来调节，并且需要快速可控的能源资源，例如电池储能系统（BESS）。为了弥补与Bess相关的高昂成本，应优化其能源和电源管理。在本文中，开发了一种凸的迭代优化方法，以找到主动分配网络中BESS的最佳主动和反应能力设定点。目的是最大程度地减少从电网购买能源的总成本。贝斯的往返和终身特征对AC功率流的放松和精确的配方进行了准确的建模，从而导致了改进的增强的松弛最佳功率流（Marop）问题。在分析中证明了在网格安全限制和技术限制下解决方案的可行性和最佳性。与文献中现有的替代方法相比，使用32个BUS IEEE测试基准来说明开发方法的性能。
Renewable energy resources and power electronics-interfaced loads introduce fast dynamics in distribution networks. These dynamics cannot be regulated by slow conventional solutions and require fast controllable energy resources such as Battery Energy Storage Systems (BESSs). To compensate for the high costs associated to BESSs, their energy and power management should be optimized. In this paper, a convex iterative optimization approach is developed to find the optimal active and reactive power setpoints of BESSs in active distribution networks. The objective is to minimize the total cost of energy purchase from the grid. Round-trip and life-time characteristics of BESSs are modelled accurately and integrated into a relaxed and exact formulation of the AC power flow, resulting into a Modified Augmented Relaxed Optimal Power Flow (MAROP) problem. The feasibility and optimality of the solution under the grid security limits and technical constraints of BESSs is proven analytically. A 32-bus IEEE test benchmark is used to illustrate the performance of the developed approach in comparison to the alternative approaches existing in the literature.
