CAJ | 학술논문

电力系统遭受故障导致发电机组失去同步后,必须及时地解列控制平息振荡,防止系统崩溃。如何快速寻找系统的失步模式是解列控制的关键步骤之一。本文提出了基于支路暂态势能函数的失步模式实时判别方法。该方法首先通过量测各支路的两端电压相角差和流过支路的有功功率,然后将这些量测数据进行综合分析得到发电机组是否失步以及判断失步模式。基于得到的失步模式和快速的解列面搜索方法确定系统合适的解列断面。本文所提方法具有可操作性、实时性强的特点。对IEEE118节点系统进行了失步模式仿真搜索,仿真算例验证了方法的有效性。
전력계통조수고장도치발전궤조실거동보후,필수급시지해렬공제평식진탕,방지계통붕궤。여하쾌속심조계통적실보모식시해렬공제적관건보취지일。본문제출료기우지로잠태세능함수적실보모식실시판별방법。해방법수선통과량측각지로적량단전압상각차화류과지로적유공공솔,연후장저사량측수거진행종합분석득도발전궤조시부실보이급판단실보모식。기우득도적실보모식화쾌속적해렬면수색방법학정계통합괄적해렬단면。본문소제방법구유가조작성、실시성강적특점。대IEEE118절점계통진행료실보모식방진수색,방진산례험증료방법적유효성。
It is possible to prevent collapse of whole post-fault power system,which is in unstable condition,by islanding control method to calm down system oscillation.Finding the out-of-step modes is the key step of islanding control.A real-time out-of-step detection method is presented in this paper.In this method,the voltage phase angle of each branch and the active power through each branch is measured.Then,the out-of-step mode is determined when the out-of-step branch formed a cut-set.Finally,the islanding boundary is found based on the out-of-step mode and proper islanding boundary searching method.This method is easily carried out and the result is found in real-time.Simulation on a practical IEEE118 bus power system shows that proposed method is effective.