GB/Z 20996.1-2007
Performance of high-voltage direct current (HVDC) systems.Part 1:Steady-state conditions (English Version)

Standard No.

GB/Z 20996.1-2007

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

Be replaced 2021-07

Replace By

GB/T 20996.1-2020

Latest

GB/T 20996.1-2020

Scope

This part of GB/Z 20996 provides general guidance on the steady-state performance requirements of HVDC systems. This part involves the steady-state performance of the two-terminal HVDC system using an I2 pulse (pulse) converter (see Figure 1) composed of two three-phase converter bridges, and it does not include the multi-terminal HVDC transmission system. The converter stations at both ends are considered to use thyristor valves as semiconductor converter valves, and have the ability to transmit power in both directions. This section does not consider the use of diode converter valves. 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. Usually, for a specific project of HVDC converter station at both ends, its performance specification should be written as a whole. Parts of the HVDC system may also be specified and procured separately, in which case due consideration must be given to the fit of each part with the performance objectives of the overall HVDC system, and the interface between each part and the system should be clearly defined. The typical parts that are relatively easy to divide and clearly connected to l21 are: a) DC transmission line, grounding pole line and grounding pole; b) telecontrol communication system; c) valve hall, foundation and other civil engineering; d) reactive power compensation equipment , including AC shunt capacitor bank, shunt reactor, synchronous condenser and static var compensator; e) AC filter; f) DC filter; g) auxiliary system; h) AC switchgear; i) DC switchgear; J) DC reactor; k) Converter transformer; 1) Lightning arrester; m) Converter valve and its auxiliary equipment; n) Control and protection system. Note: In fact, it is difficult to separate the last two items.

GB/Z 20996.1-2007 history

• 2020 GB/T 20996.1-2020 Performance of high-voltage direct current (HVDC) systems with line-commutated converters—Part 1: Steady-state conditions
• 2007 GB/Z 20996.1-2007 Performance of high-voltage direct current (HVDC) systems.Part 1:Steady-state conditions

GB/Z 20996.1-2007 Performance of high-voltage direct current (HVDC) systems.Part 1:Steady-state conditions was changed to GB/T 20996.1-2020 Performance of high-voltage direct current (HVDC) systems with line-commutated converters—Part 1: Steady-state conditions.