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An optimal power flow algorithm for AC/DC hybrid power systems with VSC‐based MTDC considering converter power losses and voltage‐droop control strategy
Author(s) -
Li Zhicheng,
He Jinghan,
Xu Yin,
Wang Xiaojun
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22732
Subject(s) - voltage droop , control theory (sociology) , voltage source , converters , power (physics) , electric power system , jacobian matrix and determinant , power control , ac power , engineering , voltage , computer science , mathematics , electrical engineering , control (management) , physics , quantum mechanics , artificial intelligence
This paper presents an optimal power flow algorithm of AC/DC hybrid power systems with voltage source converter‐multiterminal high‐voltage direct current (VSC‐MTDC) networks, considering precise converter power losses and voltage‐droop control strategy. Based on the generalized model of VSC stations accounting for the converter power losses, the optimal power flow model of AC/DC power system with VSC‐MTDC networks is developed. The effects of control strategies of VSC stations on the settings of optimal variables and equality constraints are discussed. To deal with the ‘coupling relationship’ between the AC power injection and the power loss of converters with droop control, an iterative algorithm to calculate the AC active power of voltage‐droop converters is proposed. Moreover, by analyzing the construction of Jacobian matrix, the step‐controlled primal–dual interior point method is used to solve the optimal power flow model. Finally, case studies are performed with the modified IEEE 30‐bus test system to evaluate the effectiveness of the proposed optimal power flow algorithm. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.