Improving nuclear generating station response for electrical grid islanding

A description of problems associated with the performance characteristics of nuclear generating stations which do not have their overall plant control design functions coordinated with the other grid controls is presented. Also presented are some design changes to typical nuclear plant controls which result in a significant improvement in both the performance of the grid island and the chances of the nuclear units staying online following a disturbance. Four areas of the overall unit controls and turbine governor controls which could be modified to better coordinate the control functions of the nuclear units with the electrical grid are emphasized. Some simulation results are presented to show the performance of a typical electrical grid island containing a nuclear unit with and without the changes