CAJ | 학술논문

南方电网区域间弱阻尼振荡已得到有效控制，但局部的以及机组原因引发的低频振荡问题仍然突出。探讨了调度运行中应对低频振荡的策略，从振荡前的预警预防和振荡发生后的紧急控制两个方面提出针对性应对措施。采用基于类噪声信号的模态参数辨识方法进行振荡前的预警预防，可摆脱对模型和参数的依赖，利用大量冗余数据提高结果可信度以及在线监视区间模式和局部模式的阻尼比，实现对危险模式的预警预防。采用基于振荡能量的振荡源定位方法进行振荡事故紧急处置，可以在振荡发生后快速准确的找到振荡的起因，定位振荡源，指导调度员采取针对性的措施快速平息振荡。利用实际振荡事故说明了所提调度应对策略的流程，并验证了所提方法的有效性。
남방전망구역간약조니진탕이득도유효공제，단국부적이급궤조원인인발적저빈진탕문제잉연돌출。탐토료조도운행중응대저빈진탕적책략，종진탕전적예경예방화진탕발생후적긴급공제량개방면제출침대성응대조시。채용기우류조성신호적모태삼수변식방법진행진탕전적예경예방，가파탈대모형화삼수적의뢰，이용대량용여수거제고결과가신도이급재선감시구간모식화국부모식적조니비，실현대위험모식적예경예방。채용기우진탕능량적진탕원정위방법진행진탕사고긴급처치，가이재진탕발생후쾌속준학적조도진탕적기인，정위진탕원，지도조도원채취침대성적조시쾌속평식진탕。이용실제진탕사고설명료소제조도응대책략적류정，병험증료소제방법적유효성。
In China Southern Power Grid, the inter-area low damping oscillations have been eliminated effectively so far, but there are local and generator-induced low frequency oscillations yet. The dispatcher strategy for low frequency oscillations is discussed in this paper, including the early warning and prevention before oscillations and the emergency control of oscillations. The modal parameter identification method using ambient data is used for early warning and prevention of oscillations. The method avoids the dependence on the models and parameters, and with redundant data it can improve the credibility of the results and the damping ratios of both inter-area modes and local modes so to realize the early warning and prevention of critical modes. The oscillation source location method based on oscillation energy is adopted to find the cause of the oscillation, and to locate the oscillation source quickly and reliably, and to give dispatchers the instructions to damp the oscillation. The proposed dispatcher strategy is demonstrated in a real oscillation incident and its validity is verified.