LITTLE ROCK, Arkansas, March 7 -- Southwest Power Pool, a corporation mandated by the Federal Energy Regulatory Commission to ensure supplies of power, transmission infrastructure and wholesale electricity prices, issued the following news release: * * * SPP names Carrie Simpson new Vice President of Markets LITTLE ROCK, ARK. - Southwest Power Pool (SPP) has chosen Carrie Simpson to serve as Vice President of Markets, effective April 1. Simpson currently serves as SPP's Senior Director of Sea  more