GB/T 36271.2-2021Power installations exceeding 1 kV a. c. and 1.5 kV d. c. - Part 2: D. c. (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"

Drafting.

This document is the second part of GB/T 36271 "AC 1kV and DC 1.5kV and above power facilities". GB/T 36271 has been issued

The following parts are distributed.

---Part 1.General Rules of Communication;

---Part 2.DC.

This document uses the redrafting method to modify and adopt IEC TS61936-2.2015 "AC 1kV and DC 1.5kV and above power equipment

Implementation Part 2.Direct Current.

Compared with IEC TS61936-2.2015, the structure of this document has changed. Since the suspension section of 5.2 is increased to 5.2.1, the 7.1

The suspension segment was increased to 7.1.1, which led to the extension of the number of subsequent bars. Deleted the 8.2 suspension section. Deleted 6.2.12, 7.5.7, 8.2.1, 10.6

The one-level article is simplified to refer to relevant standards.

The technical differences between this document and IEC TS61936-2.2015 and the reasons are as follows.

---Regarding normative reference documents, this document has made adjustments with technical differences to adapt to my country's technical conditions and adjustments.

The situation is collectively reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows.

* Replace IEC 60071-1 (see 5.1 and 5.3.2) with GB/T 311.1 modified to adopt international standards;

* Replace IEC 60071-2.1996 (see 5.3.4) with GB/T 311.2-2013 which is modified to adopt international standards;

* Replace IEC 60071-5 (see 5.1) with GB/T 311.3 modified to adopt international standards;

* Replace IEC 60529 (see 7.2.2 and 7.2.4) with GB/T 4208 which is equivalent to adopting international standards;

* Replace IEC 62271-1 (see 4.2.5 and 6.2.7) with GB/T 11022 modified to adopt international standards;

* Replace IEC 60079-10-2 (see 4.4.1) with GB/T 12476.3 which is modified to adopt international standards;

* Replace IEC /T S60479-1.2005 with GB/T 13870.1-2008 equivalent to adopting international standards (see 10.2.1 and

Appendix B);

* Replace IEC 60060-1 (see 5.3.2) with GB/T 16927.1 modified to adopt international standards;

* Replace IEC /T R61000-5-2 (see 10.2.2) with GB /Z 30556.2 which is equivalent to adopting international standards;

* Replace IEC 61936-1.2010/AMD1.2014 (see

Chapter 4, Chapter 6, Chapter 7, Chapter 8, Chapter 9, Chapter 10, Chapter 11, and Chapter 12);

---Modified the source reference standard for the definition of valve terms (see 3.1);

---Modified the terminology of system nominal voltage (see 3.3);

---Modified the DC high [electric] voltage term (see 3.7);

---Modified the DC low [electric] voltage term (see 3.8);

---Revised the source reference standard for the definition of converter station terms (see 3.9);

---Deleted the term lightning impact protection level (protection device) and the term operation impact protection level (protection device);

--- Deleted "local regulations (if any)" (see 4.2.1);

---Modified the content to directly quote GB/T 36271.1-2018 (see 4.2.3);

---Deleted the rated frequency content;

---Modified the sequence of the calculation formula to "1.1xUdm/2" (see 4.2.5);

--- Deleted "dust continuously accumulates on insulators and conductive surfaces in the DC electric field" (see 4.4.1);

---The calculation formula for the minimum electrical clearance of the live part has been deleted (see 5.4.1);

--- Deleted "Rotational force exceeding 6mT may be obvious, causing difficulties at around 60mT. Translational force exceeding 10-4T2/m

It may be obvious, equal to the gravity above 10-3T2/m" (see 6.2.2);

--- Modify the height "2250mm" to "2500mm" (see 7.2.4);

---Revised the appendix title (see Appendix B);

---Modified the left symbol of formula B.1 and formula B.2 to UTp (see Appendix B).

This document has made the following editorial changes.

---In accordance with the requirements of GB/T 1.1-2020, the compilation of the "Scope" chapter was standardized;

---Adjusted references.

Introduction

GB/T 36271 "AC 1kV and DC 1.5kV and above Power Facilities" aims to ensure the safe and reliable operation of high-voltage power facilities

The minimum requirements and some additional information are proposed to be composed of three parts.

---Part 1.Communication. The purpose is to establish general requirements for the design and installation of power facilities above 1kV AC.

---Part 2.DC. The purpose is to establish general requirements for the design and installation of power facilities above DC 1.5kV.

---Part 3.Requirements for the preparation of safety publications. The purpose is to establish the safety of power facilities above AC 1kV and DC 1.5kV.

Principles and requirements for the compilation of full publications.

This document puts forward technical requirements and recommendations for the design and installation of power facilities above 1.5kV DC to ensure the safety and

normal operation.

1kV AC and 1.5kV DC power facilities

Part 2.DC

1 Scope

This document specifies the design and installation requirements of power facilities in DC systems with a nominal voltage above 1.5kV.

This document applies to the following facilities.

a) Converter station or DC switch station;

b) One or more DC power generation or storage units such as solar power farms or battery storage units on a plant site. including DC equipment

Equipment and cables and all related power electronic equipment, control equipment, switchgear and electrical auxiliary systems. Excluding different plants

Connection between site DC power generation or storage units;

c) DC facilities installed on offshore facilities for power generation, transmission, distribution and storage of electricity;

d) DC terminal stations between underground cables and overhead lines or between underground cables in different sections.

This document does not apply to the design and installation of the following facilities.

---Overhead lines and underground cables between independent facilities;

---Electrified railway;

---Mining equipment and facilities;

---Ship facilities and offshore facilities for oil extraction;

---Electrostatic equipment such as electrostatic precipitator and spraying device;

---Test site;

---Medical X-ray equipment and other medical equipment;

---Valve Hall.

This document does not apply to live work.

This document does not apply to the design of pre-installed thyristor valves, voltage source converter (VSC) valves and switchgear.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

GB/T 311.1 Insulation coordination Part 1.Definitions, principles and rules (GB/T 311.1-2012, IEC 60071-1.2006,

MOD)

GB/T 311.2-2013 Insulation coordination Part 2.Guidelines for use (IEC 60071-2.1996, MOD)

GB/T 311.3 Insulation coordination Part 3.Insulation coordination procedures for HVDC converter stations (GB/T 311.3-2017,

IEC 60071-5.2014, MOD)

GB/T 4208 enclosure protection class (IP code) (GB/T 4208-2017, IEC 60529.2013, IDT)

GB/T 11022-2020 Common technical requirements for high-voltage AC switchgear and control equipment standards (GB/T 11022-2020,

IEC 62271-1.2017, MOD)

GB/T 12476.3 Electrical equipment for combustible dust environment Part 3.Classification of places where combustible dust is or may be present

(GB/T 12476.3-2017,IEC 60079-10-2.2009,MOD)