GB/Z 20996.3-2007 Replaced National standards

GB/Z 20996.3-2007 Performance of high-voltage direct current (HVDC)systems—Part 3:Dynamic conditions

Publish Date: 2007-06-21 Implement Date: 2024-08-16 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/Z 20996.3-2007

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Power semiconductor devices and components

ICS Name: Rectifiers, converters, and regulated power supplies

Publish Date: 2007-06-21

Implement Date: 2024-08-16

Pages: 27 pages

Scope

This part of GB/Z 20996 provides comprehensive guidelines for the dynamic performance of high-voltage direct current (HVDC) systems. In this part, dynamic performance refers to events and phenomena covering the range from transient conditions to steady-state conditions in the characteristic frequency or time domain. The dynamic performance involved should pertain to the mutual influence between the HVDC transmission system at both ends and the connected AC system or its components, such as power plants, AC lines, buses, reactive power sources, etc., under steady-state or transient conditions. The HVDC transmission system at both ends consists of a 12-pulse (wave) converter unit composed of a three-phase bridge circuit (two-line), which has bidirectional power transmission capability. The converter uses thyristor valves insulated with gapless metal oxide surge arresters in the bridge arms. This part does not consider diode converter valves. Although multi-terminal HVDC transmission systems are not specifically mentioned, many of the contents in this part are also applicable to multi-terminal systems. GB/Z 20996 consists of three parts: Part 1 - Steady-State, Part 2 - Faults and Operations, and Part 3 - Dynamic. During the development and compilation process, efforts have been made to avoid duplication of content among the three parts. Therefore, when users prepare specifications for HVDC transmission systems at both ends, they should refer to all three parts. For various components of the system, attention should be paid to the differences between system performance specifications and equipment design specifications. This part does not stipulate equipment technical conditions and test requirements, but focuses on those technical requirements that affect system performance. This part also does not include detailed earthquake performance requirements. In addition, there may be many differences among different HVDC systems, and this part does not discuss these in detail