基于参考机的单机等面积暂态稳定分析

提出了相对参考机的单机稳定裕度评估方法.研究了单一机组功角曲线的表达方式，将多机系统中单机功角曲线表达为本机相对参考机转子角度的函数，提出了基于泰勒级数的功角曲线预测拟合方法.提出了稳定裕度的预测评估方法与事后评估方法，比较了事后评估与预测评估所得稳定裕度的差异.SGEAC方法在判别系统是否稳定时没有任何假设，不需要进行动态二群的识别.实例验证了所提方法的有效性.

A Fast Quantitative Transient Stability Margin Determination Method Based on SGEAC

Based on single machine equal area criterion, the stability margin based on single study generator and reference generator was defined.The power angle curve expression for single study machine was analyzed.Based on the Taylor series, the power angle curve of single study generator can be expressed as the function of the rotor angle of the study generator with respect to the reference machine angle, which is fitted by using polynomial function.The stability margins obtained by both prediction method and post event method were compared.Single Generator Equal Area Criterion(SGEAC) based stability margin is the real evaluation of the global stability margin, and it does not need the identification of the two group mode.Lots of example analysis verified the proposed method.