IEEE C37.016-2018/Cor 1-2021

There is a small error in 7.14.1 that was in the final draft sent to IEEE. The three equations for E should be the same as in C37.09-2018. In C37.016-2018 one of the equations is correct, one is wrong, and one is missing. The corrigenda will revise the document to match C37.09-2018. An additional task is to make sure that the references to C37.04, .09, 100.1, and 100.2 are all correct. Since all of these standards were released in the same year, we should be sure the references match.