Abstract：For wind farm connection VSC-HVDC transmission has obvious techno-economic advantages, but concentrated integration of large scale wind power demands stronger robustness. Based on the mathematical model of VSC-HVDC in three phase frame, the Euler-Lagrange model of voltage-source-converter (VSC) in rotating d-q frame is built and the strict passivity of VSC is proved. Based on the energy dissipativity of VSC, energy storage function is set up by state error and error storage function is used as Lyapunov function, VSC-HVDC is astringed to desired stable equilibrium point rapidly by damping assigning. The passivity controler is designed according to the astringency condition of error storage function, and decoupling control of each variable is achieved. Under different operating conditions, VSC-HVDC system is simulated by software PSCAD/EMTDC. The results show the proposed control strategy has good dynamic and steady performance and strong robustness.
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2013, Vol. 28 
