IEC TR 62001-1:2016(E), which is a Technical Report, provides guidance on the specifications of AC filters for high-voltage direct current (HVDC) systems with line-commutated converters and filter performance calculation. This document deals with the specification and design evaluation of AC side harmonic performance and AC side filters for HVDC schemes. It is intended to be primarily for the use of the utilities and consultants who are responsible for issuing the specifications for new HVDC projects and evaluating designs proposed by prospective suppliers. The scope of this document covers AC side filtering for the frequency range of interest in terms of harmonic distortion and audible frequency disturbances. It excludes filters designed to be effective in the Power Line Carrier (PLC) and radio interference spectra. The bulk of this document concentrates on the \'conventional\' AC filter technology and line-commutated HVDC converters. The changes entailed by new technologies are also discussed. This first edition of IEC TR 62001-1, together with IEC TR 62001-2, IEC TR 62001-3 and IEC TR 62001-4, cancels and replaces IEC TR 62001 published in 2009. This edition constitutes a technical revision. IEC TR 62001-1 includes the following significant technical changes with respect to IEC TR 62001:
a) Clauses 3 to 5, 7 to 9, 17, 20, Annexes A and C to E have been expanded and supplemented;
b) Annexes C and F on the definition of telephone interference parameters and voltage sourced converters have been added.