Etap.PowerStation.v16.1 ETAP 16.1 Release is Now Available! ETAP® announces the latest version of its power system analysis software, ETAP 16.1. This point release augments the many enhancements and features of ETAP 16 multi-language release with focus on expansion of User-Definable Dynamic Model (UDM) libraries. ETAP 16.1 CDIRVINE, Calif. – March 23, 2017 - ETAP® announces the latest version of its power system analysis software, ETAP 16.1. This point release augments the many enhancements and features of ETAP 16 multi-language release with focus on expansion of User-Definable Dynamic Model (UDM) libraries: Over 50 New UDM Models: IEEE 421.5 Exciters IEEE 421.5 PSS, UEL and OEL WECC Approved Exciters and Governors Energy Storage Models Math functions with Multiple Inputs Go-To blocks for Internal / External Connections C# Scripting using MIMO Function Blocks Blazing performance up to 50 times faster