Abstract
This paper gives a description of the control and measurement system inside the Low Voltage Marine Substation at the Lysekil Research site located close to Lysekil on the Swedish west coast. The Lysekil project is run by the Swedish Centre for Renewable Electric Energy Conversion at Uppsala University.
The control and measurement system consists of three PACs, Programmable Automation Controllers, inside the Marine Substation. Each PAC is dedicated to one of the tasks safety and relay-control, DC to AC inversion and data-acquisition. One PAC controls the land based measuring-station. The system has been tested with the control algorithm constant modulation index. The control algorithms constant DC level and constant AC level has been discussed, especial the different behaviour of the algorithms when connected to the grid compared to connected to resistive loads.