论文标题
分布式最佳守恒电压降低综合初级分配系统
Distributed Optimal Conservation Voltage Reduction in Integrated Primary-Secondary Distribution Systems
论文作者
论文摘要
本文提出了一种分布式领导者追随者控制方法，以通过最佳安排分布式能源（DERS）的智能逆变器来实现三相不平衡分配系统中的保护电压（CVR）。所提出的方法的一个特征是考虑集成的原发性分布网络和电压依赖性负载。为了简化大量辅助网络所引入的计算复杂性，我们根据网络连接将系统分配到分布式领导者追随者控制区域中。为了解决非线性功率流量和负载模型的非转化性，提出了基于反馈的线性近似使用瞬时功率和电压测量值。这使得拟议方法的在线实现可以快速跟踪由DERS领导的系统变化。该方法的另一个功能是领导者追随者控制器的异步实现，这使其与不均匀的更新率兼容，并且在沟通延迟和失败方面具有稳健的态度。在美国中西部的实际分配馈线上进行数值测试，以验证所提出方法的有效性和鲁棒性。
This paper proposes an asychronous distributed leader-follower control method to achieve conservation voltage reduction (CVR) in three-phase unbalanced distribution systems by optimally scheduling smart inverters of distributed energy resources (DERs). One feature of the proposed method is to consider integrated primary-secondary distribution networks and voltage dependent loads. To ease the computational complexity introduced by the large number of secondary networks, we partition a system into distributed leader-follower control zones based on the network connectivity. To address the non-convexity from the nonlinear power flow and load models, a feedback-based linear approximation using instantaneous power and voltage measurements is proposed. This enables the online implementation of the proposed method to achieve fast tracking of system variations led by DERs. Another feature of the proposed method is the asynchronous implementations of the leader-follower controllers, which makes it compatible with non-uniform update rates and robust against communication delays and failures. Numerical tests are performed on a real distribution feeder in Midwest U. S. to validate the effectiveness and robustness of the proposed method.
