CAJ | 학술논문

提出了以发电机节点无功变化量和负荷节点电压变化量为指标的电压薄弱节点识别方法，该方法仅需要相邻时刻的无功和电压变化量，因此计算速度很快，适合在线识别。以IEEE9系统为算例，在负荷连续增长和短路情况下分别对系统的薄弱节点进行识别，并与传统的指标进行比较，结果表明，在负荷连续增长的情况下，文中的指标与传统指标均能实时跟踪电压薄弱节点，而在短路后发生振荡的情况下，传统指标很难快速跟踪。
제출료이발전궤절점무공변화량화부하절점전압변화량위지표적전압박약절점식별방법，해방법부수요상린시각적무공화전압변화량，인차계산속도흔쾌，괄합재선식별。이IEEE9계통위산례，재부하련속증장화단로정황하분별대계통적박약절점진행식별，병여전통적지표진행비교，결과표명，재부하련속증장적정황하，문중적지표여전통지표균능실시근종전압박약절점，이재단로후발생진탕적정황하，전통지표흔난쾌속근종。
A method to identify nodes with weak voltage stability, in which the reactive power variation of generator buses and voltage variation of load buses are taken as indices, is proposed. Because in the proposed method only variations of reactive power and voltage of adjacent moments are needed, so its calculation is rapid and it is suitable for online identification of nodes with weak voltage stability. Taking IEEE 9-bus system for example, under the conditions of continue load growth or short-circuit fault the nodes with weak voltage stability in power system are identified respectively, and the obtained results are compared with the results identified by traditional indices. Comparison results show that under continue load growth the real-time tracking of nodes with weak voltage stability can by implemented by both the proposed indices and traditional indices, however under the condition of short-circuit fault-post oscillation it is hard for traditional indices to rapidly trace nodes with weak voltage stability.