Layout optimization of China's power transmission lines for renewable power integration considering flexible resources and grid stability. (February 2022)

• Record Type: Journal Article
• Authors: Yu, Shiwei; Zhou, Shuangshuang; Qin, Junpeng
• Is Part Of: International journal of electrical power & energy systems. Volume 135(2022)
• Publication Date: 2022-02
• Subjects: Layout optimization -- Transmission capacity -- Renewable energy -- Energy storage -- Demand response; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2021.107507
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: An novel multi-objective model is proposed for the optimal transmission lines layout. Impacts of energy storage and demand response in RE power integration are explored. Eleven types of DC and AC transmission technologies are considered. The stability of transmission network is modeled from the macro level. Abstract: To eliminate power transmission bottleneck and improve cross-regional consumption of renewable power in China, a multi-objective optimization model for transmission line layout is established by considering grid stability and the flexible resource. The optimal line route, technology selection among eleven types of direct current (DC) and alternating current (AC) transmission technologies, transmission capacity, and completion time of inter-regional transmission lines among the six major regions are determined. The results show that power transmission capacity of Northwest-to-East and North-to-Central will increase by 265% and 160%, respectively, in 2039, compared with that in 2018. DC of 800 kV (10 GW) will become the main transmission technology from 2033. The peak period of the line-construction completion will be 2036–2039. The central and eastern regions have registered the fastest growth in the proportion of wind and solar power-installed capacity in China. The proportion of wind and solar power-installed capacity in these areas in 2039 will be 4–6 times that in 2018. Increasing energy storage and improving demand-side response can increase the on-grid renewable power by 1.7% and 2.6%, respectively; however, it will lead to a reduction of 2–6 and 7–9 newly-built lines, respectively.