TY - EJOU
AU - Su, Miaohong
AU - Dong, Haiying
AU - Liu, Kaiqi
AU - Zou, Weiwei
TI - A Subsynchronous Oscillation Suppression Method Based on Self-Adaptive Auto Disturbance Rejection Proportional Integral Control of Voltage Source Converter Based Multi-Terminal Direct Current System with Doubly-Fed Induction Generator-Based Wind Farm Access
T2 - Energy Engineering
PY - 2020
VL - 117
IS - 6
SN - 1546-0118
AB - A subsynchronous oscillation suppression strategy based on self-adaptive
auto disturbance rejection proportional integral controller is proposed for doublyfed induction generator-based wind farm integrated into grid through voltage source
converter based multi-terminal direct current. In this strategy, the nonlinear PI controller is constructed by *fal* function to replace the traditional linear PI controller,
and then the tracking differentiator is used to arrange the appropriate transition process in combination with the idea of active disturbance rejection control, and the
self-adaptive auto disturbance rejection proportional integral controller is designed.
By applying the controller to the inner loop of the converter on the rotor side of the
doubly-fed induction generator, the adaptability of the control parameters of the
inner loop to the change of operating conditions of the system can be improved,
and the dynamic performance of the system can be improved. The simulation
results on PSCAD/EMTDC show that, compared with SSDC, when the wind speed
is 7.5 m/s, 8.5 m/s and 9.5 m/s, the convergence time can be shortened by 0.2 s,
0.1 s and 0.25 s, respectively. When the number of grid-connected doubly-fed
induction generator wind turbines is 200 and 220, the convergence time is shortened by 0.1s. When the self-adaptive auto disturbance rejection proportional integral controller and the multi-channel variable-parameter additional subsynchronous
damping controller work together, the convergence time under the above three wind
speeds are 2.7 s, 2.7 s and 2.3 s, respectively. When the number of grid-connected
doubly-fed induction generator wind turbines is 200 and 220, the convergence time
is 2.65 s and 2.75 s, respectively. It can be concluded that the self-adaptive auto
disturbance rejection proportional integral controller can realize the effective suppression of the subsynchronous oscillation under different operating conditions of
the wind farm via the comparison with the additional subsynchronous damping
control of doubly-fed induction generator. Besides, subsynchronous oscillation will
converge faster and the stability of the system can be enhanced when the self-adaptive auto disturbance rejection proportional integral controller and the multi-channel
variable-parameter additional subsynchronous damping controller work together.
KW - Doubly-fed induction generator; voltage source converter based multiterminal direct current; subsynchronous oscillation; self-adaptive auto disturbance rejection proportional integral controller
DO - 10.32604/EE.2020.011805