GB/T 6115.1-2026Series capacitors for power systems - Part 1: General (English PDF)

Foreword

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

Drafting.

This document is Part 1 of GB/T 6115 "Series Capacitors for Power Systems". GB/T 6115 has already published the following parts.

---Part 1: General Provisions;

---Part 2: Protection devices for series capacitor banks;

---Part 3: Internal Fuse;

---Part 4: Thyristor-controlled series capacitors.

This document supersedes GB/T 6115.1-2008 "Series Capacitors for Power Systems - Part 1: General Rules" and is consistent with GB/T 6115.1-Compared to 2008, aside from structural adjustments and editorial changes, the main technical changes are as follows.

a) Changed "(Capacitor) Ambient Air Temperature", "Capacitor", "Capacitor Cell", "Cooling Air Temperature", and "Fuseless Capacitor Bank".

The terms and definitions of "segment (of a series capacitor)," "sub-segment," and "matching current of a nonlinear resistor" (see 3.1, 3.3, 3.4, 3.7) are as follows.

3.28, 3.32, 3.34 (and 3.1, 3.3, 3.4, 3.7, 3.30, 3.34, 3.36 of the 2008 edition);

b) The terms "insulation level" and "power frequency withstand voltage" have been removed (see 3.14 and 3.20 of the 2008 edition);

c) The normal operating conditions have been changed, with the icing thickness changed to "not exceeding 20mm" and the solar radiation changed to "not exceeding 1100W/m2" (see...).

4.1 (4.1 in the 2008 edition);

d) The non-standard usage conditions have been changed to require earthquake acceleration according to the 'moderate or high earthquake level' specified in IEEE Std 693.

The word "degree" has been changed to "horizontal acceleration greater than 0.2g" to better reflect my country's actual situation (see 4.3, 2008 version 4.3);

e) The acceptance criteria for the thermal stability test have been changed (see 5.9, 2008 version 5.9);

f) The test method for the capacitor unit to withstand three positive impulse voltages in the lightning impulse voltage test between the terminals and the casing has been removed.

(See 5.11 in the 2008 edition);

g) An isolation test for the internal fuse has been added (see 5.2.3);

h) Change "Special Test (Durability Test)" to "Aging Test" (see 5.2.4, 5.2.3 in the 2008 version);

i) The standard insulation level for the system nominal voltage of 1000kV has been increased (see Table 3);

j) The content regarding "creepage distance" has been modified (see 6.2, 2008 version 6.2);

k) The contents of Table 4 have been changed (see Table 4, 2008 version);

l) The contents of Tables 5, 6, and 7 have been changed (see 6.3, 2008 version 6.3);

(m) An altitude correction factor has been added to the external insulation performance of devices installed at altitudes above 1000m (see 10.7.2);

n) The requirement for "long-distance transmission line correction" has been added (see 10.8).

This document is modified to adopt IEC 60143-1:2015 "Series capacitors for power systems - Part 1: General".

Compared with IEC 60143-1:2015, this document has undergone the following structural adjustments.

---The positions of the terms "(capacitor's) internal fuse" and "fuseless capacitor bank" have been adjusted;

---The position of the content related to the labeling method for describing insulation levels has been adjusted.

The technical differences between this document and IEC 60143-1:2015 and the reasons therefor are as follows.

a) The scope has been changed in accordance with the requirements of GB/T 1.1, which describes the main contents specified in this document (see Chapter 1).

b) The terms and definitions of "capacitor", "(capacitor's) internal fuse", and "fuseless capacitor bank" have been changed (see 3.3, 3.11, 3.14).

c) Based on the actual application of series capacitors in my country, the terms "insulation level" and "power frequency withstand voltage" have been deleted.

d) Regarding normative references, this document has made adjustments to reflect technical differences to adapt to my country's technical conditions. The details of these adjustments are as follows.

The changes are primarily reflected in Chapter 2, "Normative References," and are detailed below.

---GB/T 311.1-2012 has replaced IEC 60071-1:2006 (see 6.1.1, 6.1.3.4, and 6.3);

---GB/T 6115.2-2017 has replaced IEC 60143-2:2012 (see 5.13, 7.3, 10.3.2);

---GB/T 18504 has replaced IEC 61049 (see Chapter 1);

---Added normative reference documents GB/T 11024.2, GB/T 26218.1, GB/T 26218.2, and GB/T 26218.3 (see...) 5.2.4, 6.2);

---The normative references IEC 60050 (all parts), IEC 62271-1:2007, and IEEE Std.693.1997 have been removed.

e) Based on my country's actual environmental conditions and power grid situation, the normal operating conditions were modified, and the icing thickness was changed to "not exceeding..." the solar radiation was changed from "20mm" to "not greater than 1100W/m2" (see 4.1) to meet the actual situation in my country.

f) Based on my country's actual environmental conditions and power grid situation, the abnormal use conditions were modified, changing the requirement to "comply with IEEE Std 693".

The phrase "the corresponding seismic acceleration at the level of an earthquake of equal or higher magnitude" should be changed to "horizontal acceleration greater than 0.2g" to better reflect the actual situation in my country.

(See 4.3).

g) Based on the actual situation of my country's capacitor industry, a thyristor-protected series capacitor (K2 type) has been added (see 5.1.3).

h) In accordance with the requirements of GB/T 6115.3, an isolation test for the internal fuse has been added (see 5.2.3).

i) Based on the actual situation of my country's capacitor industry, the capacitance deviation has been modified (see 5.3.2).

j) Based on the actual situation of my country's capacitor industry, the routine test requirements for external fuse losses are removed.

k) Based on the actual situation of my country's capacitor industry, the qualification criteria for thermal stability testing have been changed (see 5.9).

l) Based on the actual situation of my country's capacitor industry, the relevant content regarding classification by voltage level in the standard values has been deleted (see...).

6.1.1).

m) The relevant tables for standard insulation levels have been changed and uniformly changed to Table 3 (see Table 3).

n) The creepage distance requirements have been modified in accordance with the requirements of the GB/T 26218 series of standards to adapt to my country's technical conditions (see 6.2).

o) In accordance with the requirements of the GB/T 26218 series of standards, the contents of the "Specific Creepage Distance" table have been changed (see Table 4).

p) Based on the actual situation of my country's capacitor industry, the contents of air gap distance in Tables 5, 6 and 7 have been changed (see 6.3).

q) Based on the actual situation of my country's capacitor industry, the method of indicating capacitance deviation after the measured capacitance on the nameplate has been changed (see...).

9.1.1).

r) In accordance with the requirements of GB/T 311.1-2012, the method for determining the external insulation performance of devices installed at altitudes above 1000m has been modified.

Adjust the correction factor (see 10.7.2).

The following editorial changes have been made to this document.

---Includes the errata in IEC 60143-1:2015/COR1.2017 and IEC 60143-1:2015/AMD1.2023, covering the relevant...

The blank space on the outer page of the clauses is marked with double vertical lines (||);

---Notes on 3.14 and 3.15 have been deleted;

---The contents of Appendix E have been changed.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Power Capacitors (SAC/TC45).

Introduction

GB/T 6115 "Series Capacitors for Power Systems" is proposed to consist of four parts.

---Part 1: General Principles. The purpose is to establish the general principles and relevant rules that must be followed for series capacitors used in power systems.

---Part 2: Protective Equipment for Series Capacitor Banks. The purpose is to establish the general principles that must be followed when designing protective equipment for series capacitor banks.

Principles and related rules.

---Part 3: Internal Fuses. The purpose is to establish the specific requirements and relevant rules for internal fuses used in series capacitors.

---Part 4: Thyristor-Controlled Series Capacitors. The purpose is to establish the specific requirements for thyristor-controlled series capacitors and...

Relevant rules.

Series capacitors for power systems Part 1: General Provisions

1 Scope

This document specifies the performance, testing, rating, safety requirements, and installation and operation guidelines for series capacitors used in power systems.

This document applies to transmission or distribution lines intended to be connected in series in AC power systems with a frequency of 15Hz~60Hz, forming their components.

Capacitor units and capacitor banks are composed of components.

This document is primarily applicable to power transmission systems.

Series capacitor units and capacitor banks are commonly used for connection to high-voltage power systems. This document applies to the entire voltage range.

This document does not apply to capacitors of the self-healing metallized dielectric type.

The following capacitors are not applicable to this document, even if they are connected in series with a circuit.

---Capacitors for induction heating devices (see GB/T 3984.1);

--- AC motor capacitors and similar applications [see GB/T 3667 (all parts)];

---Power electronic capacitors (see GB/T 17702);

--- Capacitors for tubular fluorescent lamps and other discharge lamp circuits (see GB/T 18489 and GB/T 18504).

Note 2.Additional requirements for capacitors protected by external fuses and requirements for external fuses are given in Appendix A and Appendix C.

Note 3.Requirements for accessories of series capacitor banks (spark gaps, nonlinear resistors, discharge reactors, current-limiting damping reactors, damping resistors, circuit breakers, etc.) See GB/T 6115.2-2017.

Note 4.Information on fuseless capacitor units and capacitor banks can be found in Appendix C.

Other related accessories, such as insulators, switches, transformers, and external fuses, can be found in the relevant standards.

The purpose of this document is.

---Develop uniform requirements for performance, testing, and ratings;

---Establish clear safety rules;

---Provides installation and operation guidelines.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

Note. In the event of any conflict between this document and the following referenced documents, the text of this document shall prevail.

GB/T 311.1-2012 Insulation Coordination - Part 1: Definitions, Principles and Rules (IEC 60071-1:2006, MOD) GB/T 311.2-2013 Insulation Coordination Part 2: Guidelines for Use (IEC 60071-2:1996, MOD) Note. There are no technical differences between the content referenced in GB/T 311.2-2013 and the content referenced in IEC 60071-2:1996.

GB/T 6115.2-2017 Series capacitors for power systems – Part 2: Protective equipment for series capacitor banks (IEC 60143-2) 2012, MOD) GB/T 6115.3-2026 Series capacitors for power systems - Part 3: Internal fuses (IEC 60143-3:2015, MOD) Note. The content referenced in GB/T 6115.3-2026 is not technically different from the content referenced in IEC 60143-3:1998.

GB/T 6115.4-2014 Series capacitors for power systems – Part 4: Thyristor-controlled series capacitors (IEC 60143-4.