基于相关发电机识别的动态等值法的算例仿真

Simulation Example of Dynamic Equivalence Method Based on Coherent Generators Identification

对具有庞大规模的现代电力系统进行暂态稳定计算时,计算存储量大,计算时间长。因而采用基于相关发电机识别的动态等值法对电力系统进行化简以克服上述问题。该方法利用相关的充要条件对相关发电机进行判定,从而达到简化网络的目的。算例中等值网络的节点数目、支路数目、发电机数目和负荷数目大约只有原始网络的50%,用等值网络进行暂态稳定计算大约可以节省一半的计算时间,且计算结果的精确度完全满足工程的需要。

When making the transient simulation for modern large scale power system, both calculation storage amount and time cost are large. So it is proposed in the paper a dynamic equivalence method based on coherent generators identification for system reducing. The method uses necessary and sufficient condition to identify the coherent generators ,and then simplifies the network. The scale of the equivalent system is of 50 percent of the original one,and the time cost of transient siumlaton for the equivalent system is reduced to almost half while the calculation precision is acceptable.