You might get better help if you told us what you were trying to do rather than just giving us some code to ponder on.
One reason for this is that PowerShell and Perl may interpret your given regular expression differently. In Perl, your regular expression has 24 capture groups. Is this really what you want?
Another reason is that there might be a better Perl implementation than just translating PowerScript. For example, if all you are trying to do with your input is to split it into columns and you are sure that none of the columns will be empty,
my @array = split qr/\s+/, $line;
is cleaner and more understandable than a 260-character (more or less) regular expression.