CAJ | 학술논문

双馈型风力发电机(doubly fed induction generator， DFIG)在新并网风电机组中占较大比例，由于具有不同于同步机组的运行特性，双馈风电机的接入给电力系统的动态行为带来一定影响。随着风电装机容量的不断增大，电力系统的稳定性将会发生改变。定义了双馈风电机组的功角特性，推导了双馈机组的等效外特性，在此基础上研究了双馈风电机组接入后单端系统的功率特性，并理论分析了双馈机组接入后单端系统的功角稳定性。研究结果表明双馈风电机组接入后单端送电系统功角的第一摆角度减小，阻尼比降低。仿真结果验证了所提理论分析的正确性。
쌍궤형풍력발전궤(doubly fed induction generator， DFIG)재신병망풍전궤조중점교대비례，유우구유불동우동보궤조적운행특성，쌍궤풍전궤적접입급전력계통적동태행위대래일정영향。수착풍전장궤용량적불단증대，전력계통적은정성장회발생개변。정의료쌍궤풍전궤조적공각특성，추도료쌍궤궤조적등효외특성，재차기출상연구료쌍궤풍전궤조접입후단단계통적공솔특성，병이론분석료쌍궤궤조접입후단단계통적공각은정성。연구결과표명쌍궤풍전궤조접입후단단송전계통공각적제일파각도감소，조니비강저。방진결과험증료소제이론분석적정학성。
Doubly fed induction generator (DFIG) has occupied a large percent of the wind generators integrated in the system. Because of the different operating characteristics from synchronous generator, the integration of DFIG has an effect on the dynamic behaviors of power system. With the penetration level of the DFIG-based wind generation increased, the power system stability will change gradually. The paper defined the DFIG power angle characteristic and derived the DFIG equivalent external characteristics. On this basis, the power characteristics of single side power system with DFIG connected is investigated and then a theoretical analysis of the system transient angle stability is demonstrated. The study suggests that the first swing angle and the damping ratio are both reduced after the DFIG integrated into the system. Lastly, the simulation results verify the correctness of the study in this paper.