围绕大规模风电经柔性直流输电(voltage sourced converter based DC transmission,VSC-DC)并网时的系统稳态控制策略展开研究,并将整个系统分成风场内双馈感应式发电机(doubly-fed induction generator,DFIG)系统和风场外VSC-DC系统2...围绕大规模风电经柔性直流输电(voltage sourced converter based DC transmission,VSC-DC)并网时的系统稳态控制策略展开研究,并将整个系统分成风场内双馈感应式发电机(doubly-fed induction generator,DFIG)系统和风场外VSC-DC系统2个独立部分分别进行控制,提出并分析了风场内DFIG系统的稳态控制策略,包括场站内DFIG的转子侧整流器(rotor side converter,RSC)、网侧逆变器(grid-side converter,GSC)稳态控制策略,以及风场外VSC-DC系统的网侧逆变器(grid side VSC,GSVSC)、风场侧整流器(wind farm VSC,WFVSC)稳态控制策略。最后,2种典型风速工况下的仿真结果证明了所提出的系统级稳态控制策略非常有效。展开更多
An inverse system method based optimal control strategy was proposed for the shunt hybrid active power filter （SHAPF） to enhance its harmonic elimination performance. Based on the inverse system method, the d-axis a...An inverse system method based optimal control strategy was proposed for the shunt hybrid active power filter （SHAPF） to enhance its harmonic elimination performance. Based on the inverse system method, the d-axis and q-axis current dynamics of the SHAPF system were decoupled and linearized into two pseudolinear subsystems. Then, an optimal feedback controUer was designed for the pseudolinear system, and the stability condition of the resulting zero dynamics was presented. Under the control strategy, the current dynamics can asymptotically converge to their reference states and the zero dynamics can be bounded. Simulation results show that the proposed control strategy is robust against load variations and system parameter mismatches, its steady-state performance is better than that of the traditional linear control strategy.展开更多
文摘围绕大规模风电经柔性直流输电(voltage sourced converter based DC transmission,VSC-DC)并网时的系统稳态控制策略展开研究,并将整个系统分成风场内双馈感应式发电机(doubly-fed induction generator,DFIG)系统和风场外VSC-DC系统2个独立部分分别进行控制,提出并分析了风场内DFIG系统的稳态控制策略,包括场站内DFIG的转子侧整流器(rotor side converter,RSC)、网侧逆变器(grid-side converter,GSC)稳态控制策略,以及风场外VSC-DC系统的网侧逆变器(grid side VSC,GSVSC)、风场侧整流器(wind farm VSC,WFVSC)稳态控制策略。最后,2种典型风速工况下的仿真结果证明了所提出的系统级稳态控制策略非常有效。
基金Project(61174068)supported by the National Natural Science Foundation of China
文摘An inverse system method based optimal control strategy was proposed for the shunt hybrid active power filter （SHAPF） to enhance its harmonic elimination performance. Based on the inverse system method, the d-axis and q-axis current dynamics of the SHAPF system were decoupled and linearized into two pseudolinear subsystems. Then, an optimal feedback controUer was designed for the pseudolinear system, and the stability condition of the resulting zero dynamics was presented. Under the control strategy, the current dynamics can asymptotically converge to their reference states and the zero dynamics can be bounded. Simulation results show that the proposed control strategy is robust against load variations and system parameter mismatches, its steady-state performance is better than that of the traditional linear control strategy.
