配电馈线中虚拟电池的最优弹性协调
Optimal and resilient coordination of virtual batteries in distribution feeders
摘要：
本文提出了一种新的分层框架，实时，网络可接受的协调响应网格资源聚合成虚拟电池（VB）。在这种情况下，VB表示直接控制负载的本地聚合，例如智能逆变器，电热水器和空调。通过求解优化问题来将馈线的期望参考轨迹分解为用于VB的约束感知设定点来实现协调。具体而言，一种新的，可证明紧，凸松弛的交流最优潮流（OPF）问题，以最佳地分配VB跟踪馈线的期望功率轨迹。除了最佳VB调度方案，实时校正控制方案的设计，这是基于最佳比例积分（PI）控制与抗饱和，拒绝馈线内和馈线间的干扰，在操作过程中出现的电力系统。在一个改进的IEEE测试系统上进行的仿真结果表明了所提出的多层VB协调框架的有效性。
英文摘要：
This paper presents a novel hierarchical framework for real-time, network-admissible coordination of responsive grid resources aggregated into virtual batteries (VBs). In this context, a VB represents a local aggregation of directly controlled loads, such as smart inverters, electric water heaters, and air-conditioners. The coordination is achieved by solving an optimization problem to disaggregate a feeder's desired reference trajectory into constraint-aware set-points for the VBs. Specifically, a novel, provably-tight, convex relaxation of the AC optimal power flow (OPF) problem is presented to optimally dispatch the VBs to track the feeder's desired power trajectory. In addition to the optimal VB dispatch scheme, a real-time, corrective control scheme is designed, which is based on optimal proportional-integral (PI) control with anti-windup, to reject intra-feeder and inter-feeder disturbances that arise during operation of the power system. Simulation results conducted on a modified IEEE test system demonstrate the effectiveness of the proposed multi-layer VB coordination framework.
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