Voltage stabilization in connection of wind farms to transmission network using VSC-HVDC

Particle swarm optimization based PI controller of VSC-HVDC system connected to a wind farm

“…Therefore, according to the Fig. 2, the transient mathematical model of converter in synchronously rotating frame of reference can be obtained as following (Livani et al 2008;Bajracharya 2008;Jie and Guangqing 2011):…”

“…This increasing demand, especially on clean energy is making the development of wind power more interesting (Trilla et al 2010). According to the European Wind Energy Association (EWEA) reporting, 12 % of the world's electricity is expected to be generated from wind power by 2020 (Muyeen et al 2009;Livani et al 2008). Onshore wind farms are nowadays capable of not only generating power but also providing support to the grid where they are connected providing ancillary services or contributing to power system stability while riding through faults in the grid.…”

Voltage Stability Bifurcation Analysis for AC/DC Systems with VSC-HVDC

“…Compared to the conventional HVDC systems, the prominent features of the VSC-HVDC system are its potential to be connected to weak AC systems, independent control of active and reactive power exchange, and so on [4][5][6]. Due to those characteristics, many researches have been done for the exploitation of VSC-HVDC to enhance system stability of AC/DC systems, that is, the improvement of transient stability [7,8], the power oscillations damping [9,10], the improvement of stability and power quality for wind farm based on VSC-HVDC grid-connected [11,12], the stability analysis of multi-infeed DC systems with VSC-HVDC [13], and the keeping voltage stable [3,[14][15][16][17].…”