IEC 62751-1:2014/AMD1:2018

IEC 62751-1:2014/AMD1:2018 is a supporting amendment to the original guidance for power losses in voltage sourced converter (VSC) valves used in high-voltage direct current (HVDC) systems. It is relevant where engineering teams need a reliable technical reference for evaluating loss-related requirements, reviewing design assumptions, or maintaining consistency in specification and compliance workflows. As an amendment to IEC 62751-1:2014, it should be used alongside the parent document when technical validation, procurement review, or conformity assessment depends on current requirements.

Purpose of IEC 62751-1:2014/AMD1:2018

The purpose of IEC 62751-1:2014/AMD1:2018 is to modify or clarify the general requirements associated with power loss considerations for VSC valves in HVDC applications. In practice, it supports technical review of how valve losses are addressed in engineering documentation, testing workflows, and performance evaluation. Organizations working on HVDC equipment may use it to align internal specifications, verify assumptions during design review, and keep compliance references consistent with the parent document, IEC 62751-1:2014.

Compliance applications of IEC 62751-1:2014/AMD1:2018

This amendment is typically relevant in HVDC project workflows where valve performance, loss calculations, and documented evaluation are part of procurement or acceptance planning. It may be consulted by manufacturers, utilities, EPC teams, test laboratories, and conformity assessment staff when reviewing technical files or preparing verification activities for VSC valve systems. IEC 62751-1:2014/AMD1:2018 can also support regulatory preparation and quality workflows where consistency between specification, testing, and supplier documentation is important.

Benefits of IEC 62751-1:2014/AMD1:2018

Using IEC 62751-1:2014/AMD1:2018 alongside the parent reference can improve technical consistency across engineering, testing, and procurement processes. It helps reduce risk in design validation by keeping loss-related requirements aligned with the intended HVDC valve framework. For organizations preparing conformity assessment evidence, the amendment supports clearer technical documentation, more stable review criteria, and better traceability during product evaluation. This can strengthen quality assurance and reduce uncertainty when comparing offers, reviewing test results, or confirming compliance status.

• Supporting amendment linked to IEC 62751-1:2014 for HVDC VSC valve loss requirements
• Useful for engineering documentation, technical review, and design verification activities
• Relevant to procurement, supplier assessment, and conformity assessment preparation
• Helps maintain consistency in testing workflows and documented evaluation