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中文摘要：
由于不可能在系统所有节点都安装相量测量单元（PMU）,因此如何以较少的关键量测信息分析系统稳定性就成为迫切需要解决的问题。提出一种直接将等面积准则（EAC）应用于多机系统稳定评估的方法：捕捉故障后最超前和最滞后的相对摇摆最厉害的机组对,通过拟合其相对功角特性曲线并应用EAC进行暂态稳定类型的快速判别和稳定性指标的快速计算。该方法无需对多机电力系统进行机群划分、机群凝聚等值,对实际系统信息需求量少,计算时间短,且可取得与时域仿真方法等同的分析精度。算例结果验证了该方法的正确性。
英文摘要：
For phasor measurement unit （PMU） can＇t be installed in all buses of a power system,how to analyze power system transient stability with little measurements is an urgent problem to be solved. This paper proposes a method of applying the equal area criterion （EAC） to multi-machine system transient stability assessment directly：the machines with the most leading angle and the most lagging angle are selected,and by fitting their relative power angle curve,EAC is used to identify the transient stability type and to fast calculate the stability index. The advantages of this method is that it avoids machine group division,equivalence,and needs less information and little computation cost. Moreover,it can obtain the same accuracy as time domain simulation method. The validity of the proposed method is proven by an example system.
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