High-Performance Optimal Power Flow Estimation for EV-Interfaced Microgrids With Standardized Grid Services
High-Performance Optimal Power Flow Estimation for EV-Interfaced Microgrids With Standardized Grid Services
复制标题
具有标准化电网服务的电动汽车接口微电网的高性能最佳潮流估计
DOI：
--
复制
发表时间：
2023
影响因子：
4.4
通讯作者：
M. Preindl
中科院分区：
文献类型：
--
作者：
Jingping Nie;Liwei Zhou;Margaret Frances Kaye;C. Silveira;Afam Nwokolo;Xiaofan Jiang;M. Preindl
随着连接到电网的具有不完整测量信息的分布式能源（DER）（例如电动汽车（EV））的数量的增加，对具有部分电力网络观测的电网状态估计的需求迅速增长。这些DER可以提供的电网服务，例如双向电动汽车充电器，有可能影响电网的弹性和效率。我们提出了一种基于交流潮流的约束优化求解器，以恢复来自电网的不完整信息[1]。我们使用IEEE 9/30/57/118总线系统的性能评估所提出的求解器，并表明它优于国家的最先进的方法（pandapower和MATPOWER）在恢复电网状态的部分观测值与高达6个数量级较小的平均绝对误差。建议的求解器具有更好的可扩展性，以处理更大的系统和更多的未知测量的系统。进一步的无功功率约束被添加到求解器以下的IEEE 1547规范，以探索增加电网服务的稳态微电网的影响。我们展示和讨论这四个IEEE总线系统的新的案例研究。介绍了IEEE总线系统在满足网格服务约束时的反应。我们说明了一个敏感性分析，反映了系统的物理特性将如何影响网格服务的实施。建议的求解器与网格服务的约束，可以作为一种工具，以帮助评估分布式网格服务和微调网格服务，以达到最佳效果。
Demand for the grid state estimation with partial power network observation is growing rapidly with the increasing amount of distributed energy resources (DER) (such as electric vehicles (EVs)) with incomplete measured information connected to the grid. The grid services that can be provided by these DER, such as bidirectional EV chargers, have the potential to affect the resilience and efficiency of the grid. We propose a constrained optimization solver based on AC power flows to recover incomplete information from the grid [1]. We evaluate the performance of the proposed solver using the IEEE 9/30/57/118-bus systems and show that it excels the state-of-the-art approaches (pandapower and MATPOWER) in recovering the grid state from partial observations with up to six orders of magnitude smaller mean absolute error. The proposed solver has better scalability to deal with larger systems and with systems with more unknown measurements. Further reactive power constraints are added to the solver following the specifications in IEEE 1547 to explore the effects of adding grid services to the steady-state microgrid. We demonstrate and discuss novel case studies on these four IEEE bus systems. And the reactions of the IEEE bus systems when following the grid services' constraints are introduced. We illustrate a sensitivity analysis that reflects how the system's physical characteristics would impact the implementation of grid services. The proposed solver with grid services constraints can serve as a tool to help evaluate distributed grid services and fine-tune grid services to optimal results.