Fortron block that is available for washout filter like the one available for leadlag block in psse 30 version

asked Mar 4 '5

Nasika
1 ●3 ●3 ●3

Hi Everyone,

I am writing a user defined model for excitation system. I that I require one washout filter block to be included in one of the control loops. I have found the blocks for low pass filter and lead-lag compensation blocks but i am unable to find the block that can be used for washout filter. i have tried to construct the block using lead-lag block ( I need (STa/(1+sTb)) so i did like this ((1+sTa)/(1+sTb))-(1/(1+sTb)) using lead-lag block). but it is giving problems during initialization it self so can anyone please help how to use washout filter block correctly