CAJ | 학술논문

电网故障情况下,光伏并网逆变器的控制器指令将发生突变,可能导致控制器进入非线性工作区域,从而使得光伏电源的故障电流暂态特征极为复杂.分别对控制器工作在线性区域和非线性区域 2 种情况下光伏电源的故障电流暂态特征及其影响因素进行了研究.在此基础上,指出了用稳态故障电流模型等效替代光伏电源以进行故障分析的处理方法的适用性.
전망고장정황하,광복병망역변기적공제기지령장발생돌변,가능도치공제기진입비선성공작구역,종이사득광복전원적고장전류잠태특정겁위복잡.분별대공제기공작재선성구역화비선성구역 2 충정황하광복전원적고장전류잠태특정급기영향인소진행료연구.재차기출상,지출료용은태고장전류모형등효체대광복전원이진행고장분석적처리방법적괄용성.
Upon grid fault, controller's reference signals of photovoltaic (PV) grid-connected inverter change abruptly, causing controller to operate in non-linear area. Consequently, the fault current transient features of PV power generator are very complicated. On condition that controller operates in both linear or non-linear areas, fault current transient features of PV power generator and their impact factors are studied in this paper. Based on it, applicability of treatment approach of equivalently replacing PV power generator with its steady-state fault current model for fault analysis is pointed out.