CAJ | 학술논문

暂态功角失稳和暂态电压失稳是故障后系统失稳的两种表现形式，暂态功角失稳和暂态电压失稳现象有可能同时发生，正确区分这2种失稳模式是进行紧急控制的前提。分析大规模复杂电力系统输电断面的有功功率特性，基于功率全微分方程，提取了能反映系统失稳模式的主导系统变量。在此基础上，研究不同失稳模式与主导系统变量之间的关系，进而提出一种主导失稳模式识别方法。该方法能充分考虑系统的动态特性，仅利用实测数据进行计算。该方法物理意义明确，使用简单，计算速度快。仿真结果表明，运用此方法可有效识别系统的主导失稳模式。
잠태공각실은화잠태전압실은시고장후계통실은적량충표현형식，잠태공각실은화잠태전압실은현상유가능동시발생，정학구분저2충실은모식시진행긴급공제적전제。분석대규모복잡전력계통수전단면적유공공솔특성，기우공솔전미분방정，제취료능반영계통실은모식적주도계통변량。재차기출상，연구불동실은모식여주도계통변량지간적관계，진이제출일충주도실은모식식별방법。해방법능충분고필계통적동태특성，부이용실측수거진행계산。해방법물리의의명학，사용간단，계산속도쾌。방진결과표명，운용차방법가유효식별계통적주도실은모식。
Rotor angle instability and transient voltage instability are two forms of system instability during the post disturbance and may occur at the same time. Recognition between them is the pre-preparation for power system emergency control. This paper analyzed the characteristics of the active power on tie lines in large scale connected power systems and extracted the principal system variables reflecting the system unstable modes based on total differential equation of active power. Then the relationship between different unstable modes and principal system variables was shown and a method for recognizing principal modes was presented. This method can take full consideration of the system dynamic characteristic, and only needs real time measurements to calculate. Moreover, the method has clear physical meaning, is simple to use and has fast calculation speed. Simulation results show that the method is effective.