Alliant Energy is the parent company of two public utility companies--Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL)--and of Alliant Energy Resources, Inc. (AER), the parent company of Alliant Energy's non-regulated operations. (PRNewsFoto/ALLIANT ENERGY CORPORATION)CEDAR RAPIDS, Iowa, April 17, 2018 /PRNewswire/ — Alliant Energy’s Iowa energy company received approval to increase its wind expansion program from the Iowa Utilities Board. By 2020, the company now plans to add 1,000 megawatts of new wind energy in Iowa – enough clean energy to power…