GB/Z 18039.7-2011Electromagnetic compatibility - Environment - Voltage dips and short interruptions on public electric power supply systems with statistical measurement results (English PDF)
电磁兼容 环境 公用供电系统中的电压暂降、短时中断及其测量统计结果
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2011
Implementation date
December 30, 2011
Scope
GB/Z 18039.7-2011 is the English-translated version of 电磁兼容 环境 公用供电系统中的电压暂降、短时中断及其测量统计结果.
GB/Z 18039.7-2011, identical to IEC/TR 61000-2-8:2002, is an EMC environment guidance document on voltage dips and short interruptions in public electric power supply systems.
It describes these disturbances by their sources, duration, amplitude and causes, with examples of faults in medium-voltage networks, and discusses their effect on specific equipment and the remedies available.
It explains how dips and short interruptions are measured, classified and summarized, and reviews statistical results from UNIPEDE, EPRI surveys and individual countries before comparing them and drawing conclusions and recommendations.
The focus is on phenomena observed on public supply networks and on electronic devices fed from them. It belongs to the GB/Z 18039 series on the electromagnetic environment. It was issued on 30 December 2011.
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Document preview — GB/Z 18039.7-2011
National Standard of the People's Republic of China
- ICS
- 33.100
- Classification
- L 06
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- 1 Scope
- 2 Terms and definitions
- 3 voltage sag and short interruption
- 3.1 source of voltage sags
- 3.2 voltage sag duration
- 3.3 voltage sag amplitude
- 3.4 short interruption
- 3.5 voltage sags and short-term interruption of the reasons
- 3.6 medium voltage grid fault example
- 4 voltage dips and short interruptions
- 4.1 Overview
- 4.2 The impact of some specific equipment
- 5 Remedies
- 5.1 General
- 5.2 Examples of remedial measures
- 6 voltage sag and short interruption measurement
- 6.1 Voltage sag and short-term interruption of the provisions of the measurement
- 6.2 Voltage Sag Measurement
- 6.3 Short-term interruption of the measurement
- 6.4 Classification of measurement results
- 6.5 Summary of Measurement Results
- 7 The resulting measurement
- 7.1 UNIPEDE statistics
- 7.2 EPRI (United States Electric Power Research Institute) survey statistics [9] [10]
- 7.3 Statistics of individual countries
- 8 Results Comparison and General Conclusion
- 8.1 Results Comparison
- 8.2 Conclusions drawn from the statistical results
- 8.3 General conclusions
- 8.4 Recommendation
- References
Foreword
This Guidance Document is one of a series of "Electromagnetic Compatibility Environment" standards that fall into the following sections.
GB /Z 18039.1-2000 Electromagnetic compatibility environment Electromagnetic environment classification (IEC 61000-2-5:1996, IDT)
GB /Z 18039.2-2000 Electromagnetic compatibility environment Industrial equipment low frequency conducted conducted power transmission disturbance assessment (IEC 61000-2-6:1996, IDT)
GB/T 18039.3-2003 Electromagnetic compatibility environment common low voltage power supply system Low frequency conducted disturbances and signal transmission compatible water Flat (IEC 61000-2-2:1990, IDT)
GB/T 18039.4-2003 Electromagnetic compatibility environment Factory compatible levels of low frequency conducted disturbances (IEC 61000-2-4:1994, IDT)
GB/T 18039.5-2003 Electromagnetic compatibility environment Common power supply system Low-frequency conducted disturbances and electromagnetic signal transmission environment (IEC 61000-2-1:1990, IDT)
GB /Z 18039.6-2005 Electromagnetic compatibility Environment Low frequency magnetic fields in various environments (IEC 61000-2-7:1998, IDT) Fruit (IEC 61000-2-8:2002, IDT)
This instructional document has been drafted in accordance with the rules given in GB/T 1.1-2009.
This Guidance Document is equivalent to IEC /T R61000-2-8.2002 "Electromagnetic Compatibility Environment Part 2-8. Public Power Supply System System voltage sags, short-term interruption and measurement of statistical results. "
1 Scope
This guidance document establishes the issue of electromagnetic disturbance of voltage sag and short interruption, relating to the sources, effects and remedies of harassment Application, measurement methods and measurement results (within this range apply). Mainly on the phenomenon observed in the line of public power supply system and right The impact of some electronic devices that receive energy from the system. "Voltage sag" is an alias of voltage sags.
2 Terms and definitions
The following terms and definitions apply to this document.
2.1 Voltage dip; voltage sag
The voltage at a point in the power supply suddenly drops below a specified threshold and then returns to normal after a short period of time.
Note 1. Typical dips and shorts are related to the occurrence and termination of short circuits, or to the rapid current increase on the system and its connected devices.
Note 2. Voltage sag is a two-dimensional electromagnetic disturbance whose level is determined by voltage and time (duration).
2.2 Short interruption
The voltage at all phases of the power supply system drops abruptly below the specified interruption threshold, then goes through a brief interval of recovery To normal.
Note: Typical short interruptions are related to the action of the switching device caused by the occurrence and termination of a short circuit to the system or system connected device.
2.3 Reference voltage (measurement of voltage dips and short interruptions)
(Voltage sag) Reference voltage < Voltage dips referencevoltage \u003cmeasurement ofvoltagedipsandshortinterruptions > The specified voltage reference, voltage sag depth, threshold, and other values are expressed in terms of their per-unit value or percentage of this reference value.
NOTE The rated or nominal voltage of the power supply system is usually selected as the reference voltage.
2.4 Voltage dip start threshold
The voltage root mean square value (rms) of the supply system to define the beginning of a voltage sag.
Note Typically this threshold is used as a typical value between 0.85 and 0.95 times the reference voltage.
2.5 Voltage dip end threshold
Voltage sag end threshold < Voltage sag measurement>.
The voltage root mean square value (rms) of the supply system to define the end of the voltage dips.
Normally, the end threshold is the same as the start threshold or exceeds the reference voltage 0.01 times the start threshold.
2.6 Interruption threshold
Interrupt threshold < voltage dips and short interruptions> interruptionthreshold \u003cmeasurementofvoltagedipsand shortinterruptions > In the power supply system, the provisions of a voltage root mean square value as the voltage sag threshold, for each phase voltage is lower than the value of this case
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.
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Related Standards
GB/Z 18039.6-2005 — Electromagnetic compatibility-environment-low frequency magnetic fields in various environments
GB/Z 18039.5-2003 — Electromagnetic compatibility - Environment - Electromagnetic environment for low-frequency conducted disturbances and signalling in public power supply systems
GB/Z 18039.2-2000 — Electromagneticcompatibility - Environment - Assessment of the emission levels in the power supply of industrial plants as regards low-frequency conducted disturbances
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