IEC EN 60919-3 Performance of High-Voltage Direct Current (HVDC) Systems with Line-Changing Converters - Part 3: Dynamic Conditions

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of IEC EN 60919-3 testing. This White Paper provides general guidance on the dynamic performance of high voltage direct current (HVDC) systems. Dynamic performance, as used in this specification, includes events and phenomena that span characteristic frequencies or the interval between time domain transient conditions and steady state.

It is concerned with dynamic performance resulting from interactions between two-terminal HVDC systems and the respective ac. switchboards, ac lines and busbars, reactive power supplies, etc. Two-terminal HVDC systems are assumed to use 12-pulse converter units with three-phase bridge (bidirectional) connections. It is assumed that the converters use gapless metal oxide holders for isolation coordination and thyristor valves as bridge arms and are capable of power flow in both directions. Diode valves are not considered in this specification. While multi-terminal HVDC transmission systems are not explicitly considered, much of the information in this specification applies equally to such systems.

In this report, which includes capacitor-swapping converter circuit configurations, only line-changing converters are discussed. General requirements for semiconductor line-changing converters are given in IEC EN 60146-1-1, IEC EN 60146-1-2 and IEC EN 60146-1-3. Voltage source converters are not considered.

There is a difference between system performance specifications and equipment design specifications for individual components of a system. While equipment specifications and test requirements are not defined here, attention is drawn to those that will affect a system's performance specifications.

There are many possible variations between different HVDC systems, so these are not covered in detail. This report should not be used directly as a specification for a particular project, but rather should provide the basis for an appropriate specification for a particular electrical power transmission scheme, tailored to fit the actual system requirements. It is not the purpose of this report to distinguish between the responsibilities of users and manufacturers for the specified work.

EUROLAB assists manufacturers with IEC EN 60919-3 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.