大区互联系统稳定计算中负荷模型研究

针对我国大区电网互联后稳定计算中出现的新情况，通过采用不同负荷模型对我国3个大区互联系统重要输电断面稳定极限的计算比较，详细分析稳定计算中马达挂在不同电压等级、配电网不同模拟方法对马达特性及稳定计算结果的影响，指出我国有些网调长期采用的马达模型存在定子漏抗过大的问题，建议现阶段采用IEEE-6马达模型，或者采用国内提出并计算出的稳定特性和稳定水平与之比较接近的研究马达模型或综稳Ⅲ型马达模型。

Dynamic load modeling for transient stability study of regional interconnected power system

Load is one of the important components in power systems and load modeling has great effect on the simulation accuracy and the decision-making in power system planning and operation. The paper was focused on resolving load modeling problems in regional interconnected power system calculations. Firstly, transmission capacities of some important transmission sections based on transient stability calculations using different load models were compared. Secondly, the influence of different ways in which induction motors were connected in power system was studied. Specifically, what voltage level the motor is connected and how to simulate the distribution system were analyzed. Thirdly, it was pointed out that the motor model has too large stator leakage reactance that was used in some dispatching institutions. Finally, it is suggested that at present IEEE-6 type induction motor model or similar motor models developed through comparisons and studies should be used.