testpscad用以通过matlab来调用PSCAD程序，并执行PSCAD的模型，结束后关闭程序； testwrite是对PSCAD的模型进行修改的一个例子-testpscad matlab to call for the adoption of PSCAD program, and execute PSCAD model, after the close of the program testwrite PSCAD model is an example of modification