scope:

This document provides general guidance on the control and protection tests of hybrid multi-terminal high-voltage direct current (HVDC) systems, which consist of line-commutated converter (LCC) at the sending end and voltage source converter (VSC) at the receiving end. It mainly includes preconditions, composition of the test system, test contents and boundaries, test items and design principles, and organization and quality control requirements. The tests involved include factory test, acceptance test, site commissioning test, and trial operation.