GB/Z 20996.3-2007
Performance of high-voltage direct current (HVDC) systems Part 3: Dynamic conditions (English Version)
- Standard No.
- GB/Z 20996.3-2007
- Language
- Chinese, Available in English version
- Release Date
- 2007
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2021-07
- Replace By
- GB/T 20996.3-2020
- Latest
- GB/T 20996.3-2020
- Scope
- This part of GB/Z 20996 provides comprehensive guidelines for the dynamic performance of HVDC systems. Dynamic performance in this standard refers to events and phenomena whose characteristic frequencies or time regions cover 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, and reactive power sources, under steady-state or transient conditions. The HVDC transmission system at both ends is composed of a 12-pulse (wave) converter unit composed of three-phase bridge connections (two-way), with bidirectional power transmission capability. The converter uses a thyristor valve as a bridge arm, which is insulated and coordinated by a gapless metal oxide arrester. Diode converter valves are not considered in this section. Although not specifically mentioned for multi-terminal HVDC transmission systems, many of the contents in this section are also applicable to multi-terminal systems. GB/Z 20996 consists of three parts. Part 1 Steady State, Part 2 Faults and Operation, Part 3 Dynamics. In the process of formulating and writing, the repetition of the three parts has been avoided as far as possible. Therefore, when the user prepares to compile the specifications of the two-terminal HVDC system, he should refer to all the contents of the three parts. For each component in the system, attention should be paid to the difference between the system performance specification and the equipment design specification. 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, different HVDC systems may have many differences, 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 compile technical specifications that meet the actual system requirements for a specific power transmission system. The content involved in this section does not distinguish the responsibilities of users and manufacturers.
GB/Z 20996.3-2007 Referenced Document
- GB/Z 20996.1-2007 Performance of high-voltage direct current (HVDC) systems.Part 1:Steady-state conditions
- GB/Z 20996.2-2007 Performance of high-voltage direct current (HVDC) systems.Part 2:Faults and switching
GB/Z 20996.3-2007 history
- 2020 GB/T 20996.3-2020 Performance of high-voltage direct current (HVDC) systems with line-commutated converters—Part 3: Dynamic conditions
- 2007 GB/Z 20996.3-2007 Performance of high-voltage direct current (HVDC) systems Part 3: Dynamic conditions
GB/Z 20996.3-2007 Performance of high-voltage direct current (HVDC) systems Part 3: Dynamic conditions was changed to GB/T 20996.3-2020 Performance of high-voltage direct current (HVDC) systems with line-commutated converters—Part 3: Dynamic conditions.