A wide-area damping controller (WADC) is effective in damping inter-area low-frequency oscillation (LFO). if the time delay in a wide-area control loop can be properly handled. In order to simplify the WADC design and enlarge the delay adaptation range. the classic power system stabilizer (PSS) is adopted. https://chefesquipmenters.shop/product-category/measuring-spoon-sets/