中文摘要：

基于暂态能量函数分析原理，提出双馈风电场模糊附加阻尼控制策略。首先，以区域间暂态振荡能量下降为目标，从理论上分析了调节风电场输出有功或无功功率能抑制电力系统区域间低频振荡的可行性。其次，在阐述双馈风电场常规PSS附加阻尼控制策略的基础上，以传输线有功功率变化作为暂态能量振荡阶段的判断依据，提出了基于模糊控制的双馈风电场附加阻尼控制策略。最后，以双馈风电场接入IEEE两区域四机系统为例，针对电网传输线三相短路故障和区域内同步发电机输入功率小扰动两种情况，对采用模糊附加阻尼控制时系统的运行性能进行仿真，并与常规PSS附加阻尼控制和无附加阻尼控制的运行效果进行比较。仿真结果验证了风电机组有功或无功功率环模糊附加阻尼控制策略的正确性，同时表明基于无功功率环的模糊附加阻尼控制不仅能更好地抑制传输线有功功率振荡而且又能减小风电机组传动链轴系扭矩的波动。

英文摘要：

Based on the theory analysis of the transient energy function, this paper proposed a fuzzy additional damping control strategy for a doubly-fed induction generator （DFIG） based wind farms. Firstly, by adjusting the active/reactive output power of the wind farm, a theoretically analysis was carried out to find that, the transient oscillation energy can be continuously reduced to suppress the inter-area low frequency oscillation. Secondly, on the basis of describing a conventional PSS additional damping control of DFIG wind farm, by judging the oscillation stage of the transient energy with the active power variation signal of transmission lines, an additional damping strategy with fuzzy control was proposed. Finally, to compare the three different control straties of fuzzy additional control, traditional PSS control and without any damping controller, the two-area four-machine IEEE power system integrated with a DFIG wind farm is taken as example, and the system dynamic performances were simulated under the operational conditions of 3-phase short-circuit of transmission lines and the small disturbance of active power on the traditional synchronous generator. The simulation results verify the effectiveness of the proposed fuzzy additional damping control strategies on the active/reactive power loop. Furthermore, besides the damping ability of the inter-area low frequency oscillation, the results also show that as with the reactive power loop with fuzzy additional damping control, it can also reduce the shaft torsional torque oscillation of the wind turbine drive train.