CAJ | 학술논문

随着区域电网互联、电网规模不断扩大和快速励磁系统的大量应用，电力系统动态稳定性问题也越来越突出，逐渐成为影响电网安全和限制输电功率极限的主要因素。由于动态元件的大量投入，改变了系统动态调节性能，若动态稳定性差将容易引发系统低频振荡。系统低频振荡会导致系统出现频率、电压、功率等电气量不同程度振荡的现象，持续恶化的互相作用最终将导致系统失稳、解列，形成大规模的停电事故。因此电力系统低频振荡问题越来越受到人们的关注，而如何正确、快速判别振荡性质成为难于解决的问题。对负阻尼振荡和强迫振荡的特性进行研究，提出了基于起振阶段暂态响应包络线形状的振荡类型判别判据，以某电网低频振荡为实例加以验证，表明所提出的研究方法能有效判断低频振荡类型。对分析实际运行中低频振荡现象以及有效抑制系统低频振荡具有重要的指导意义。
수착구역전망호련、전망규모불단확대화쾌속려자계통적대량응용，전력계통동태은정성문제야월래월돌출，축점성위영향전망안전화한제수전공솔겁한적주요인소。유우동태원건적대량투입，개변료계통동태조절성능，약동태은정성차장용역인발계통저빈진탕。계통저빈진탕회도치계통출현빈솔、전압、공솔등전기량불동정도진탕적현상，지속악화적호상작용최종장도치계통실은、해렬，형성대규모적정전사고。인차전력계통저빈진탕문제월래월수도인문적관주，이여하정학、쾌속판별진탕성질성위난우해결적문제。대부조니진탕화강박진탕적특성진행연구，제출료기우기진계단잠태향응포락선형상적진탕류형판별판거，이모전망저빈진탕위실례가이험증，표명소제출적연구방법능유효판단저빈진탕류형。대분석실제운행중저빈진탕현상이급유효억제계통저빈진탕구유중요적지도의의。
With the large applications of the regional power grid interconnection , grid expanding and fast excitation systems , the dynamic stability problems of power system are more prominent , and gradually become the main factor influencing the grid security and power limit .Since a large number of dynamic elements being put into operation , the dynamic regulation perform-ance is changed , and the poor dynamic stability will likely lead to low -frequency oscillation .Low-frequency oscillation can cause the system to have the oscillations of frequency , voltage, power and other electrical quantities in different degrees , the deteriorating interaction will eventually lead to system instability and splitting which will form large -scale blackouts .There-fore, low-frequency oscillation problem is getting more and more attention , and how to determine the oscillation properties correctly and quickly becomes a difficult problem .Therefore, the characteristics of negative damping oscillation and forced os-cillation are studied , the oscillation distinguishing criterion for envelope shape based on transient response in start -up phase are proposed .It is verified by taking the low -frequency oscillation of one grid as example , and it shows that the proposed method can effectively determine the type of low -frequency oscillations , which has an important guiding significance for ana-lyzing low-frequency oscillation and suppressing low -frequency oscillation in actual operation .