NB/T 41010-2018Power supply technical guidelines for AC electric arc furnace - Power quality control (English PDF)
交流电弧炉供电技术导则 电能质量控制
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
April 3, 2018
Implementation date
July 1, 2018
Scope
NB/T 41010-2018 is the English-translated version of 交流电弧炉供电技术导则 电能质量控制.
NB/T 41010-2018 completes the Chinese energy industry guidelines on AC electric arc furnace power supply with the part on power quality control. It sets the general requirements, the control schemes, the design and parameter check of power quality control devices, and their operation control.
Informative appendices describe typical domestic control installations for arc furnaces, how a thyristor controlled reactor generates harmonic currents, a check of secondary filter branch parameters that takes interharmonics into account, and a simulation case for checking passive filter parameters.
It applies to primary refining AC arc furnaces of 70 t to 250 t and ladle refining furnaces of 70 t to 300 t fed by dedicated lines at 110 kV to 330 kV, and other arc furnace supply systems may use it by reference. Issued on 3 April 2018, it has applied since 1 July 2018.
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Document preview — NB/T 41010-2018
National Standard of the People's Republic of China
- Classification
- K 04
Issued by: National Energy Administration of the People's Republic of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 General requirements
- 5 Power quality control scheme
- 6 Design and parameter check of power quality control device
- 7 Operation control
- Appendix A (informative) Typical domestic high quality electric arc furnace power quality control device
- Appendix B (informative) TCR harmonic current generation
- Appendix C (informative) Check method for secondary filter branch parameters considering interharmonics
- Appendix D (informative) Passive filter parameter check simulation case
- References
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the general requirements for power quality control of AC electric arc furnaces, control schemes, device design and parameter check, and operation. control.
This standard applies to 70t ~ 250t primary refining AC electric arc furnace and 70t ~ 300t ladle refining furnace powered by 110kV ~ 330kV dedicated line.
System, other types of AC electric arc furnace power supply system can refer to this standard.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 14549-1993 power quality public grid harmonics
GB/T 20298 Static reactive power compensation device (SVC) functional characteristics
GB/T 26868-2011 Guidelines for the Design and Application of High Voltage Filtering Devices
DL/T 1216 Technical specifications of static synchronous compensation device for distribution network
DL/T 1217 Magnetically Controllable Shunt Reactor Technical Specifications
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 AC electric arc furnace
Furnace with AC arc as main heat source. AC electric arc furnace is the general name of primary electric arc furnace (EAF) and ladle refining furnace (LF).
3.2 Power quality
Power quality;
The electrical characteristics at the specified point of the power system are related to the voltage and current of the power supply and power equipment. Degree of quasi-technical parameters.
Note: The benchmark technical parameters generally refer to the index values under ideal power supply conditions. These parameters may involve compatibility between power supply and load. [GB/T 32507-2016, definition 2.1.1]
3.3 Point of common coupling
A connection for more than one user in a power system. [GB/T 32507-2016, definition 2.1.19]
3.4 Fundamental (component)
The sine wave component corresponding to the power frequency after the period is expanded by the Fourier series. [GB/T 32507-2016, definition 2.6.4]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 27 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 14549-1993Quality of electric energy supply--Harmonics inpublic supply network
- GB/T 20298The functional specification of Static Var Compensater
- GB/T 26868-2011The guide for design and application of high-voltage power filters
- DL/T 1216Technical specification for low-voltage static var generator (SVG)
- DL/T 1217Technical specification for magnetically controlled shunt reactor
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Related Standards
DL/T 1216-2019 — Technical specification for low-voltage static var generator (SVG)
DL/T 1217-2013 — Technical specification for magnetically controlled shunt reactor
GB/T 14549-1993 — Quality of electric energy supply--Harmonics inpublic supply network
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