Journal of System Simulation ›› 2018, Vol. 30 ›› Issue (3): 1082-1089.doi: 10.16182/j.issn1004731x.joss.201803039

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Passivity-based Control for Three-phase Four-bridge D-STATCOM in Low-voltage Distribution Network

Zheng Hong, Xu Wencheng, Zhang Jiawei   

  1. Jiangsu Key Laboratory of Drive and Intelligent Control for Electric Vehicle, School of electrical and information engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2016-02-29 Online:2018-03-08 Published:2019-01-02

Abstract: Three-phase four-bridge distribution static synchronous compensator (D-STATCOM) has the obvious superiority in solving the problems that brought by the three-phase unbalanced loads in the three-phase four-wire low-voltage power supply system. The Euler-Lagrange (EL) cycle average model is established based on the synchronous rotation d-q-0 coordinates. In the light of the nonlinear and strong coupling characteristics, the passivity-based control (PBC) and inverse cross coupling control strategy using the d-q axis nonlinear decoupling control. PBC controller is designed by energy shaping and damping injection (ESDI) based on the passivity of the system. The closed-loop system is demonstrating asymptotically stable according to the Lyapunov stability theory. Simulation results verify to the control strategy deal with three-phase unbalance and other problems effectively.

Key words: four-bridge D-STATCOM, EL average cycle model, energy shaping and damping injection, passivity-based control

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