This part of GB/Z 20996 provides comprehensive guidelines for the dynamic performance of high voltage DC systems. Dynamic performance in this section refers to events and phenomena whose characteristic frequency or time region covers the range between transient conditions and steady-state conditions. The dynamic performance it involves should belong to the interaction between the high-voltage DC transmission system at both ends and the connected AC system or its components, such as power plants, AC lines and busbars, reactive power sources, etc., under steady-state or transient conditions. The high-voltage DC transmission system at both ends is composed of a 12-pulse (wave) converter unit composed of three-phase bridge wiring (dual circuit), with bidirectional power transmission capability. The converter uses thyristor valves insulated by gapless metal oxide arresters as bridge arms. Diode commutator valves are not considered in this section. Although multi-terminal HVDC transmission systems are not specifically mentioned, many contents in this section also apply to multi-terminal systems. GB/Z 20996 consists of three parts. Part 1 Steady State, Part 2 Failures and Operation, Part 3 Dynamics. During the formulation and writing process, duplication of content in the three parts has been avoided as much as possible. Therefore, when users prepare specifications for high-voltage DC systems at both ends, they should refer to all three parts. For each component in the system, attention should be paid to the difference between system performance specifications and equipment design specifications. This section does not specify equipment technical conditions and test requirements, but focuses on those technical requirements that affect system performance. This section also does not include detailed seismic performance requirements. In addition, there may be many differences between different high-voltage DC systems, which are not discussed in detail in this section. Therefore, this section should not be directly used as a technical specification for a specific engineering project. However, it can be used as a basis to prepare technical specifications for specific transmission systems that meet the actual system requirements. The content covered in this section does not differentiate between the responsibilities of the user and the manufacturer.
IEC TR 60919-3:1999 Referenced Document
GB/Z 20996.1-2007 Performance of high-voltage direct current (HVDC) systems.Part 1:Steady-state conditions*， 2007-06-21 Update
GB/Z 20996.2-2007 Performance of high-voltage direct current (HVDC) systems.Part 2:Faults and switching*， 2007-06-21 Update
IEC TR 60919-3:1999 history
2021IEC TR 60919-3:2009/AMD2:2021 Amendment 2 - Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 3: Dynamic conditions
2016IEC TR 60919-3:2009/AMD1:2016 Amendment 1 - Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 3: Dynamic conditions
2016IEC TR 60919-3:2016 AMENDMENT 1 Performance of high-voltage direct current (HVDC) systems with line-commutated converters – Part 3: Dynamic conditions (Edition 2.0)
2009IEC TR 60919-3:2009 Performance of high-voltage direct current (HVDC) systems with line-commutated converters - Part 3: Dynamic conditions
1999IEC TR 60919-3:1999 Preformance of high-voltage direct current(HVDC)systems--Part3:Dynamic conditions