CAJ | 학술논문

提出一种仅由角速度来计算功角对故障切除时间灵敏度(sensitivity of power angle to fault clearing time，SPAFCT)的方法。通过对不同详略程度发电机模型的分析，导出SPAFCT与角速度轨迹之间的关系，由此可实现根据轨迹计算SPAFCT。研究表明，SPAFCT与角速度轨迹之间的关系不随模型详略程度(模型阶数)而改变，说明在由角速度轨迹计算 SPAFCT 时不会受到系统模型参数误差的影响。单机系统和10机39节点系统的算例表明，所提方法具有较高的计算精度且计算简便。算例还表明 SPAFCT 中蕴含了丰富的电力系统暂态稳定裕度的信息。
제출일충부유각속도래계산공각대고장절제시간령민도(sensitivity of power angle to fault clearing time，SPAFCT)적방법。통과대불동상략정도발전궤모형적분석，도출SPAFCT여각속도궤적지간적관계，유차가실현근거궤적계산SPAFCT。연구표명，SPAFCT여각속도궤적지간적관계불수모형상략정도(모형계수)이개변，설명재유각속도궤적계산 SPAFCT 시불회수도계통모형삼수오차적영향。단궤계통화10궤39절점계통적산례표명，소제방법구유교고적계산정도차계산간편。산례환표명 SPAFCT 중온함료봉부적전력계통잠태은정유도적신식。
A trajectory sensitivity calculation method of power angle to fault clearing time (SPAFCT) based on rotor speed was proposed. The mathematical relationship between the SPAFCT and the generator rotor speed was constructed by different generator models, and the SPAFCT could be obtained only by the rotor speed. It was indicated in the analysis that the mathematical relationship between the SPAFCT and the rotor speed was invariant with varied generator models. And the accuracy of SPAFCT was independent of models and parameters. Studies on the single-machine and infinite bus system (SMIB) and the New England 10-Generator and 39-Bus system show that the trajectory sensitivity calculation output by the proposed method is accurate, and the proposed method is simple. The case studies also indicate that SPAFCT contains rich information about power system transient stability margin.