TY - JOUR
T1 - Stability analysis and energy storage-based solution of wind farm during low voltage ride through
AU - Liu, Ju
AU - Yao, Wei
AU - Fang, Jiakun
AU - Wen, Jinyu
AU - Cheng, Shijie
PY - 2018/10
Y1 - 2018/10
N2 - According to most grid codes, wind farms are required to inject reactive current into the connected power gridduring fault. However, this requirement may lead to the system instability and the failure of low voltage ride-through (LVRT), especially for the wind farms connected to a weak grid. In this paper, we suppose that theinstability of wind farm during LVRT is mainly due to the instability of the phase-locked loop (PLL), thus a state-space model of the wind power system including the PLL under the low voltage condition is established forstability analysis. The mechanism of the system instability phenomenon during fault is investigated and revealed. To address this problem, an energy storage system (ESS)-based stability control strategy is proposed tomaintain the stability of the wind power system during fault. The detailed electromagnetic model of the testsystem including three wind farms is installed in PSCAD/EMTDC environment for simulation studies. Simulationresults verify the correctness of the obtained stability analysis results and the effectiveness of the ESS-basedstability control strategy
AB - According to most grid codes, wind farms are required to inject reactive current into the connected power gridduring fault. However, this requirement may lead to the system instability and the failure of low voltage ride-through (LVRT), especially for the wind farms connected to a weak grid. In this paper, we suppose that theinstability of wind farm during LVRT is mainly due to the instability of the phase-locked loop (PLL), thus a state-space model of the wind power system including the PLL under the low voltage condition is established forstability analysis. The mechanism of the system instability phenomenon during fault is investigated and revealed. To address this problem, an energy storage system (ESS)-based stability control strategy is proposed tomaintain the stability of the wind power system during fault. The detailed electromagnetic model of the testsystem including three wind farms is installed in PSCAD/EMTDC environment for simulation studies. Simulationresults verify the correctness of the obtained stability analysis results and the effectiveness of the ESS-basedstability control strategy
KW - Low voltage ride through (LVRT)
KW - Phase-locked loop (PLL)
KW - Energy storage system (ESS)
KW - Frequency
KW - Injection current
U2 - 10.1016/j.ijepes.2018.03.013
DO - 10.1016/j.ijepes.2018.03.013
M3 - Journal article
SN - 0142-0615
VL - 101
SP - 75
EP - 84
JO - International Journal of Electrical Power & Energy Systems
JF - International Journal of Electrical Power & Energy Systems
ER -