A Two-layer Framework for Mitigating the Con-gestion of Urban Power Grids Based on Flexible Topology with Dynamic Thermal Rating  

作　　者：Yi Su Jiashen Teh Qian Luo Kangmiao Tan Jiaying Yong 

机构地区：[1]the School of Automation and Electronic In-formation,Xiangtan University,xiangtan 411100,China [2]IEEE [3]the School of Electrical and Electronic Engineering,Universiti Sains Malaysia(USM),Penang 11800,Malaysia [4]the School of Computer Sciences,Universiti Sains Malaysia(USM),Penang 11800,Malaysia [5]the Institute of Power Engineering,College of Engineering,Universiti Tenaga Nasional(UNITEN),Kajang 43000,Malaysia

出　　处：《Protection and Control of Modern Power Systems》2024年第4期83-95,共13页现代电力系统保护与控制（英文）

基　　金：supported by the Universiti Sains Malaysia,Research University Team(RUTeam)Grant Scheme(No.1001/PELECT/8580011).

摘　　要：The urban power grid(UPG)combines transmission and distribution networks.Past studies on UPG congestion mitigation have primarily focused on relieving local congestion while ignoring large-scale energy transfer with safety margins and load balancing.This situation is expected to worsen with the proliferation of renewable energy and electric vehicles.In this paper,a two-layer congestion mitigation framework is proposed,one which considers the congestion of the UPG with flexible topologies.In the upper-layer,the particle swarm optimization algorithm is employed to optimize the power supply distribution(PSD)of substation transformers.This is known as the upper-layer PSD.The lower-layer model recalculates the new PSD,known as the lower-layer PSD,based on the topology candidates.A candidate topology is at an optimum when the Euclidean distance mismatch between the upper-and lower-layer PSDs is the smallest.This optimum topology is tested by standard power flow to ascertain its feasibility.The optimum transitioning sequence between the initial and optimum topologies is also determined by the two-layer framework to minimize voltage deviation and line overloading of the UPG considering dynamic thermal rating.The proposed framework is tested on a 56-node test system.Results show that the proposed framework can significantly reduce congestion,maintain safety margins,and determine the optimum transitioning sequence.

关 键 词：Congestion mitigation urban power grid two-layer framework transitioning sequence dynamic thermal rating 

分 类 号：TM721.3[电气工程—电力系统及自动化] TM73