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GB/T 39270-2020 English PDF

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US$339.00 · In stock
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GB/T 39270-2020: Voltage dip indices and severity assessment method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39270-2020	339	Add to Cart	4 days	Voltage dip indices and severity assessment method	Valid

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Basic data

Standard ID: GB/T 39270-2020 (GB/T39270-2020)
Description (Translated English): Voltage dip indices and severity assessment method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K04
Classification of International Standard: 29.020
Word Count Estimation: 18,119
Date of Issue: 2020-11-19
Date of Implementation: 2021-06-01
Quoted Standard: GB/T 30137-2013; GB/T 32507-2016
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the connotation, calculation method and severity evaluation method of voltage sag indicators (including single event indicators, node indicators, and system indicators). This standard applies to AC 50 Hz power systems. The index calculation and severity evaluation methods in this standard are also applicable to short-term interruptions.

GB/T 39270-2020: Voltage dip indices and severity assessment method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Voltage dip indices and severity assessment method ICS 29.020 K04 National Standards of People's Republic of China Voltage sag index and severity evaluation method 2020-11-19 released 2021-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Single event indicator of voltage sag 2 4.1 Overview 2 4.2 Energy Index 2 4.3 Sag severity index 3 5 Voltage sag node index 3 5.1 Overview 3 5.2 Node sag frequency 3 5.3 Node SARFI indicator 3 5.4 Node Energy Index 3 5.5 Node sag severity index 4 6 Voltage sag system indicators 4 6.1 Overview 4 6.2 System sag frequency 5 6.3 System SARFI Index 5 6.4 System Energy Index 5 6.5 System sag severity index 5 7 Evaluation method of voltage sag severity 5 7.1 Evaluation Step 5 of the Severity of Voltage Sag 7.2 Evaluation method for the severity of a single event sag 5 7.3 Evaluation method of node sag severity 6 7.4 Evaluation method of system sag severity 6 Appendix A (Normative Appendix) The calculation and severity of the voltage sag index considering the uncertainty of the tolerance curve of sensitive equipment Evaluation method 8 Appendix B (informative appendix) Calculation method and example of reference value of voltage sag severity classification based on energy index 10 Appendix C (informative appendix) Calculation example of voltage sag severity index 14 Reference 15

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This standard was proposed and managed by the National Standardization Technical Committee for Voltage, Current Rating and Frequency (SAC/TC1). Drafting organizations of this standard. Guangdong Power Grid Co., Ltd. Guangzhou Power Supply Bureau Electric Power Test Research Institute, North China Electric Power University, China Machinery Productivity Promotion Center, South China University of Technology, Sichuan University, State Grid Fujian Electric Power Research Institute, North China Electric Power Research Institute have Limited Liability Company, Guangdong Power Grid Co., Ltd. Electric Power Research Institute, Guangxi Power Grid Co., Ltd. Electric Power Research Institute, State Grid River Electric Power Research Institute of Southern Electric Power Company, Electric Power Research Institute of State Grid Shanxi Electric Power Company, Electric Power Section of State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Global Energy Internet Research Institute Co., Ltd., Nanjing Canneng Electric Power Automation Co., Ltd., MCC Jingcheng Engineering Technology Co., Ltd. Co., Ltd., Xi’an Boyu Electric Co., Ltd., Shenzhen China Power Technology Co., Ltd., Wuhan University, China Southern Power Grid Research Institute have Limited Liability Company, State Grid Shanghai Electric Power Research Institute, Yunnan Power Grid Co., Ltd. Electric Power Research Institute, State Grid Beijing Municipal Electric Power Company Electric Power Research Institute, Anhui Nanrui Jiyuan Power Grid Technology Co., Ltd., State Grid Heilongjiang Electric Power Co., Ltd. Electric Power Research Institute Research Institute. The main drafters of this standard. Mo Wenxiong, Xu Yonghai, Ma Zhiyuan, Xu Zhong, Zhang Ping, Xiao Xianyong, Zhong Qing, Luan Le, Wu Danyue, Cai Wei, Ma Ming, Chen Weidong, Li Qionglin, Wang Jinhao, Yuan Xiaodong, Liu Yingying, Yao Dongfang, Liu Guangwen, Liu Juncheng, Wang Xin, Sun Jianjun, Ding Zejun, Pan Ling, Guo Cheng, Jia Dongqiang, Wang Hao, He Yu. Voltage sag index and severity evaluation method

1 Scope

This standard specifies the connotation, calculation method and severity process of voltage sag indicators (including single event indicators, node indicators, and system indicators). Degree evaluation method. This standard applies to AC 50Hz power systems. The index calculation and severity evaluation methods in this standard are also applicable to short-term interruptions.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 30137-2013 Power quality voltage sag and short-term interruption GB/T 32507-2016 Power quality terminology

3 Terms and definitions

The following terms and definitions defined in GB/T 30137-2013 and GB/T 32507-2016 apply to this document. For convenience Used, the following repeatedly lists some terms and definitions of GB/T 30137-2013 and GB/T 32507-2016. 3.1 Voltage dip (sag) The root mean square value of the power frequency voltage at a certain point in the power system suddenly decreases to 0.1pu~0.9pu, and after a short duration of 10ms~1min Return to normal. [GB/T 30137-2013, definition 3.1] 3.2 Short interruption The root-mean-square value of the power frequency voltage at a certain point in the power system suddenly drops below 0.1pu, and resumes after a short duration of 10ms~1min normal phenomenon. [GB/T 30137-2013, definition 3.2] 3.3 Voltage dip (short interruption) threshold Used to judge the voltage sag (short-term interrupt) start and end and set the voltage threshold. [GB/T 30137-2013, definition 3.3] 3.4 Voltage dip (short interruption) duration The duration of the voltage sag (short-term interrupt) event that reaches the voltage sag (short-term interrupt) threshold. [GB/T 30137-2013, definition 3.4] 3.5 Suspended (short interruption) frequency The number of voltage sags (short-term interruptions) in a certain period of time. [GB/T 30137-2013, definition 3.6] ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39270-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39270-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 39270-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39270-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.