IEEE 2771-2021 pdf download

IEEE 2771-2021 pdf download.IEEE Guide for Parameter Confguraton of Arcing Horns of DC Earth Electrode Lines
1.1 Scope
This guide indicates the configuration parameters for arcing horns of direct current (dc) earth electrode lines, including sustained dc arc current, composition, installation, and gap distance of arcing horns. This guide applies to the configuration of arcing horns of dc earth electrode lines (hereafter referred to as arcing horns) for new or reconstructed dc transmission projects.
1.2 Purpose T
his guide indicates the dimension, installed position, and gap distance of arcing horns of earth electrode lines, and provides a criterion for the configuration of arcing horns of dc earth electrode lines, which increases the safety and stability of dc transmission systems.
1.3 Word usage
The word shall indicates mandatory requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted (shall equals is required to). 1,2
The word should indicates that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required (should equals is recommended that).
The word may is used to indicate a course of action permissible within the limits of the standard (may equals is permitted to). The word can is used for statements of possibility and capability, whether material, physical, or causal (can equals is able to).
2. Normative references The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained).
For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. IEEE Std 1899™-2017, IEEE Guide for Establishing Basic Requirements for High-Voltage Direct-Current Transmission Protection and Control Equipment. 3,4
IEC 60060-1:2010, High-Voltage Test Techniques—Part 1: General Defnitions and Test Requirements.5
IEC 60071-2:2018, Insulation Co-ordination—Part 2: Application Guidelines.
IEC 60633:2019, Terminology for High-Voltage Direct Current (HVDC) Transmission.
IEC 61325:1995, Insulators for Overhead Lines with a Nominal Voltage above 1000 V—Ceramic or Glass Insulator Units for d.c. Systems—Defnitions, Test methods and Acceptance Criteria.
3. Defnitions, acronyms, and abbreviations
3.1 Defnitions For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
6 arcing horn: A lightning protection device connected in parallel with the insulators and generally composed of a high voltage side electrode, a grounding side electrode, and connection fttings. The gap distance of the arcing horn is less than the length of insulators, which can provide fashover path as well as transfer and guide the arc. earth electrode: Conducting elements placed in the earth or the sea, which provide a low resistance path between a point in the dc circuit and the earth, and are capable of carrying continuous current for some extended period. (IEEE Std 1899™-2017).
7 earth return: Operation mode in which the return current path between neutrals of the HVDC substations is through the earth. (IEC 60633:2019). electrode line: Insulated line between the HVDC substation dc neutral bus and the earth electrode. (IEEE Std 1899-2017). Syn: earth electrode line.
HVDC transmission system: An HVDC system that transfers energy between two or more geographic locations. (IEEE Std 1899-2017). pole (current) balancing: Control action to balance the currents in the two poles of a bipole system, in order to limit the differential current that fows between the neutrals of the high-voltage direct-current system. (IEEE Std 1899-2017).
sustained dc arc current: Sustained dc current fowing into the ground through the arcing horn in the form of arc when arcing horn breaks down.IEEE 2771 pdf download.IEEE 2771-2021 pdf download