Increment-correction method for online distributed optimisation in distribution networks with extra-high DER integration

作     者：Xie, Kaijun Liu, Mingbo Lu, Wentian 

作者机构：South China Univ Technol Sch Elect Power Engn Guangzhou Guangdong Peoples R China 

出 版 物：《IET RENEWABLE POWER GENERATION》 (IET. Renew. Power Gener.)

年 卷 期：2020年第14卷第11期

页      面：1933-1945页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 08[工学] 

基　　金：Project of the Guangdong Electric Power Trading Center Company [GDKJXM20172986] Postdoctoral Science Fund of China [2019M650198] 

主　　题：distribution networks load flow distributed power generation distributed algorithms voltage control power distribution control optimisation increment-correction method distribution network extra-high DER integration future distribution networks extra-high distributed energy resources extra-high DER penetration DER output setpoints existing online distributed algorithms efficient distributed manner the DER owner distribution system operator DER integration level 

摘      要：This study focuses on future distribution networks featuring the integration of extra-high distributed energy resources (DERs). In these distribution networks, the extra-high DER penetration and the randomness and volatility of DER outputs increase the likelihood of voltage problems. Hence, it is necessary to design efficient solutions for DER output setpoints to regulate the voltages of distribution networks. However, the existing online distributed algorithms were designed based on different linearised technologies for power flow equations, which will cause imprecise results under extra-high DER integration. In this study, the authors propose an increment-correction method to improve the linearised power flow model. To obtain an efficient distributed manner, they introduced an indirect function into the end-customer (the DER owner) s objective function, stimulating them to provide voltage-regulating service. In particular, two price incentive signals contained in the indirect function were transmitted from the distribution system operator to drive the DER owner to regulate output increments, which is suitable for cases where the DER belongs to different end-customers. The proposed method can not only protect the private information of end-customers but also enhance the robustness of the distribution network for the DER integration level. Numerical test results demonstrate the merits of the proposed method.