I have a tab/worksheet with several named ranges

The named ranges are defined in this format:
Insert>Name>Define "plot_time"
=OFFSET('Curve Fitter (TC#116)'!$C$13,0,0,COUNTA('Curve Fitter (TC#116)'!$D:$D)-1)
Then these names are used to plot the data in a Line Chart:
Series1>XValues = ='Curve Fitter (TC#116)'!plot_time
This works fine except I need to copy another version of the entire worksheet. Now the new sheet has a new name of course. So my hard-coded links are broken. I need something like the equivalent VBA ThisWorkbook, which would be dynamically updated to reference ThisSheet containing the current chart.