Two-stage AC/DC optimal power flow with VSC-MTDC considering uncertainty of wind power
DOI：10.19783/j.cnki.pspc.191011
Key Words:VSC-MTDC  wind power integration  prediction error  two-stage optimization  AC/DC power system  optimal power flow (OPF)
Author NameAffiliationE-mail
YANG Zhelin School of Electric Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China  
WANG Keyou School of Electric Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China wangkeyou@sjtu.edu.cn 
LI Guojie School of Electric Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China  
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Abstract:Considering the impact of uncertain wind power integrated through a multi-terminal flexible direct current (VSC-MTDC) transmission system on the operation of an AC system, a two-stage AC/DC optimal power flow model with VSC-MTDC considering wind power uncertainty is proposed. This paper focuses on the optimization of VSC-MTDC in real-time scheduling, based on the dispatching idea of “multi-level coordination and step-by-step refinement”. During intraday rolling dispatching, the model optimizes the generator’s operation cost according to the short-term forecast data of wind power. During real-time dispatching, it continuously adjusts and optimizes the control instructions of the VSC converter station and the output of the buffer unit based on the ultra-short-term forecast data of wind power, and corrects the impact of short-term forecast errors of wind power on AC system network losses and voltage levels immediately. The proposed model is applied to the IEEE 30-node and IEEE 118-node example, and the validity and feasibility of the proposed model are verified.
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