准定量法与精确定量法在暂态稳定分析中的融合

电力系统暂态稳定性的量化方法——扩展等面积准则(EEAC)具有与数值积分法同样的模型适应性与分析精度,已广泛应用于电力系统的在线分析.为了应对系统规模和模型复杂性的增加对计算量的新挑战,引入因果驱动与数据驱动相融合的算例筛选环节.文中提出定性多档分类、准定量分析,以及精确量化算法三者结合的框架,设计了"两层筛选"的多输...

Integration of Quasi-quantitative and Quantitative Methods in Transient Stability Analysis

Extended equal-area criterion(EEAC),a quantitative method of power system transient stability,has the same mode adaptability and analysis accuracy as the step-by-step numerical integration method,and has been widely used in the online analysis of power systems.In order to cope with the new challenges of the increase in system scale and model complexity to the amount of calculation,a case filtering process that combines causal driving and data driving is introduced.A framework is proposed by combining qualitative multiple classification,quasi-quantitative analysis and precise quantitative algorithms,and a“two-layer screening”multi-output classifier is designed.In addition to keep the two time-varying indices in the feature vector of case filtering,a causal index reflecting the variability of the unstable mode has also been added,which improves the quality of the classification result and significantly improves the efficiency and robustness of the case filtering.The overall performance of the case filterer after being integrated into the EEAC engineering software is verified through the simulation test of the 9 provincial power systems in China.