福州地区负荷模型影响福建电网暂态稳定性的机理

综合负荷实质上是由各种用电设备、无功补偿设备等经过变压器、线路等连接而成的复杂网络。为了检验福建电网现有负荷模型的合理性，以福双(福州-双龙)线的稳定极限作为重要衡量指标，对福州地区电网采用不同的网架结构和节点负荷模型下福建电网的暂态稳定水平进行了计算，并对影响负荷特性和电网稳定水平的各因素进行了分析。分析表明，综合负荷中电动机负荷的模型、并联电容补偿以及变压器和线路的阻抗对于负荷的特性有较大的影响，应在负荷模型中得到合理的反映。

Influence of Load Models of Fuzhou Power Network on Transient Stability of Fujian Power Grid

A composite load is essentially a complex network comprising kinds of power devices, var compensation devices and transmission and distribution elements. To investigate the rationality of the load model currently used by Fujian power grid, the stability limits of Fushuang lines are calculated for different network structure and nodal load models of Fuzhou power network as index of Fujian power grid's transient stability level, and factors influencing load characteristics and system stability are analyzed. It is found that model of induction motors, shunt capacitors and impedance of transformers and power lines have important influence on characteristics of composite loads, and should be appropriately represented in load models.