Pilot drill with coupon retainer and hot tapping machine using the same that positively retains a coupon cut out by a hole saw. The mcVAG has improved performance characteristics, which include desirable handling characteristics such as ease of suturing, kink resistance and the ability to serve as a cannulation route soon after the implant procedure. A plurality of elongate elements are contained in the elongate member, the elongate elements comprising at least one electrical conductor and at least one element of a non-conductive material arranged adjacent the at least one electrical conductor to form at least one non-conductive region associated with the elongate member. Simulations results from several practical large-scale power systems embedded with multiple Convertible Static Compensators demonstrate the effectiveness of the proposed models.