关于小器件的应用，怎么实现跟随时间变化等等，有帮助，希望能对初学者有帮助，此外还有信号的触发和接受，pscad-On the application of small devices, how to follow the change of time and so on, help, I hope to be helpful for beginners, in addition to the signal trigger and accept, PSCAD