可以计算电力系统概率潮流，利用半不变量和GRAM级数展开法所编制的程序，收敛度很好

可以计算电力系统概率潮流，利用半不变量和GRAM级数展开法所编制的程序，收敛度很好-Power system can calculate the probability of the trend, the use of semi-invariants and GRAM series expansion method developed by the procedure, a good degree of convergence