CAJ | 학술논문

虚拟惯量控制方式下，直驱永磁风力发电机组(DDPMSG)能够为电力系统提供较好的频率支撑，但虚拟惯量控制使DDPMSG与系统之间产生了新的耦合关系，给系统的小干扰稳定带来新的影响。建立了包含DDPMSG的风电并网系统状态空间平均模型，并通过线性化得到其小信号模型。基于该小信号模型，利用特征分析法分析了虚拟惯量控制的比例系数和微分系数对风电并网系统的小干扰稳定性的影响，同时对比分析了虚拟惯量控制及最大功率跟踪控制对系统小干扰稳定的影响。结果表明虚拟惯量控制对系统阻尼特性的影响与 DDPMSG 接入系统的位置及容量有关，且主要影响其所接入区域的局部振荡模式和系统的区域振荡模式。
허의관량공제방식하，직구영자풍력발전궤조(DDPMSG)능구위전력계통제공교호적빈솔지탱，단허의관량공제사DDPMSG여계통지간산생료신적우합관계，급계통적소간우은정대래신적영향。건립료포함DDPMSG적풍전병망계통상태공간평균모형，병통과선성화득도기소신호모형。기우해소신호모형，이용특정분석법분석료허의관량공제적비례계수화미분계수대풍전병망계통적소간우은정성적영향，동시대비분석료허의관량공제급최대공솔근종공제대계통소간우은정적영향。결과표명허의관량공제대계통조니특성적영향여 DDPMSG 접입계통적위치급용량유관，차주요영향기소접입구역적국부진탕모식화계통적구역진탕모식。
Wind turbine with direct-drive permanent magnet synchronous generator (DDPMSG) can provide frequency support for power system under the control of virtual inertia, but it creates new coupling relationship between the DDPMSG and the system, which affects the small signal stability of the power system. This paper sets forth a state space averaging model of wind power integrated system containing the DDPMSG by reasonable simplification, and obtains its small signal model through linearization. Based on the small signal model, it analyzes the impact of proportion coefficient and differential coefficient of the virtual inertia control on small signal stability of the wind farm integrated system, and comparatively analyzes the impact of the virtual inertia control and maximum power point tracking control on small signal stability of the power system, by the eigenvalue analysis method. Results show that capacity and location of the wind power, controlled by virtual inertia, make a difference in damping performance of power system, and mainly in the integrated area’s local oscillation mode and inter-area oscillation mode.