GB/T 20840.103-2020 English PDFUS$1449.00 · In stock
Delivery: <= 9 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20840.103-2020: Instrument transformers - Part 103: The use of instrument transformers for power quality measurement Status: Valid
Basic dataStandard ID: GB/T 20840.103-2020 (GB/T20840.103-2020)Description (Translated English): Instrument transformers - Part 103: The use of instrument transformers for power quality measurement Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Classification of International Standard: 29.180 Word Count Estimation: 78,762 Date of Issue: 2020-03-31 Date of Implementation: 2020-10-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20840.103-2020: Instrument transformers - Part 103: The use of instrument transformers for power quality measurement---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. Instrument transformers--Part 103.The use of instrument transformers for power quality measurement ICS 29.180 K41 National Standards of People's Republic of China Transformers. Part 103.Transformers in power quality Application in measurement (IEC TR61869-103..2012, Instrumenttransformers-Theuseofinstrument 2020-03-31 release 2020-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee ContentsForeword Ⅴ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Essential Question 5 5 Power quality parameters according to GB/T 17626.30-2012 5 6 Influence of transformer on power quality measurement 12 7 Power Quality Test 53 Appendix A (informative appendix) The structural changes of this part compared with IEC TR61869-103..2012 59 Appendix B (informative appendix) The technical differences and causes of this part and IEC TR61869-103..2012 61 Appendix C (informative appendix) Transformers and power quality measurement --- outstanding questions 63 Appendix D (Informative Appendix) Transformer Class 66 References 69 Figure 1 Measuring chain 6 Figure 2 The effect of transformers on the overall measurement uncertainty 6 Figure 3 Example of voltage fluctuations causing flicker 8 Figure 4 The modulation process of the IEC scintillator 8 Figure 5 Example of voltage sag and swell 9 Figure 6 Example of voltage interruption 10 Figure 7 Example of voltage imbalance 10 Figure 8 Example of voltage harmonics 11 Figure 9 Voltage transformer technology frequency applicable range 13 Figure 10 Current transformer technology frequency applicable range 13 Fig. 11 Example of equivalent circuit of electromagnetic voltage/current transformer 14 Figure 12 Sectional view of a cast electromagnetic voltage transformer with a voltage range of 1kV (inclusive) to 52kV (inclusive) Figure 13 Independent high-voltage voltage transformer structure diagram 17 Figure 14 Typical electromagnetic voltage transformer 420kV frequency response example 17 Figure 15 Example of the first resonance frequency point 18 Figure 16 Cross-sectional view of current transformer 20 Figure 17 Example of 400V frequency response of low voltage current transformer 20 Figure 18 Example of 10kV frequency response of microcrystalline alloy core coil current transformer 21 Fig. 19 Example of frequency response of low-voltage 10P5 current transformer 21 Figure 20 Example of results obtained by 245kV current transformer 23 Figure 21 Example of results obtained by 245kV current transformer. detail picture 23 Fig. 22 Example of frequency response of 110kV Permalloy core current transformer 24 Figure 23 Cross-sectional view of capacitive voltage transformer 25 Figure 24 Equivalent circuit diagram of capacitive voltage transformer operating at power frequency 25 Figure 25 Simplified Thevenin equivalent circuit of a capacitive voltage transformer without compensation reactor operating at line frequency 26 Figure 26 Simplified Thevenin equivalent circuit of the capacitive voltage transformer operating at power frequency 26 Figure 27 Complete Thevenin equivalent circuit of a capacitive voltage transformer operating at line frequency 27 Figure 28 Schematic diagram of measurement using a capacitive voltage transformer with harmonic measurement terminals 29 Figure 29 Comparison of different measurement examples with and without harmonic measurement end 29 Figure 30 The basic design of bulk crystal to produce Pockels effect 32 Figure 31 Different methods of applying voltage to the crystal 33 Figure 32 Different voltage division methods applied to the crystal 33 Figure 33 Basic design scheme of Pockels sensor 34 Figure 34 Pockels sensing unit 34 for engineering applications Figure 35 Example of calculation result of frequency response of optical voltage transformer 35 Figure 36 Sectional and schematic diagrams of the resistor divider 36 Figure 37 Amplitude-frequency characteristic curve of MV resistor divider 37 Figure 38 Phase frequency characteristic curve of medium voltage resistor divider 37 Figure 39 Schematic of Capacitive Voltage Divider 38 Figure 40 Equivalent circuit of RC divider 40 Figure 41 Equivalent circuit of the resistance-capacitance voltage divider in equilibrium state 41 Figure 42 An example of the frequency response of a RC divider 41 Figure 43 Example of amplitude-frequency characteristics of resistance-capacitance voltage divider when the voltage is 145kV and the cable length is 150m 42 Figure 44 Measuring principle of optical current transformer 43 Figure 45 Measuring principle of optical current transformer 43 Figure 46 Example of calculation result of frequency response of optical current transformer 44 Figure 47 LPCT typical frequency response measurement example 45 Figure 48 Roche coil equivalent circuit 46 Figure 49 Schematic diagram and physical picture of Roche coil current transformer 48 Figure 50 Electrical scheme for shunt current measurement 49 Figure 51 Shunt DC application 49 Figure 52 Compensating shunt equivalent circuit 49 Figure 53 The theoretical bandwidth of the 5kA/150mV shunt 50 Figure 54 Hall Effect Sensor 51 Figure 55 Hall Effect Sensor 52 Figure 56 Hall Effect Sensor 52 Figure 57 Test circuit for voltage transformer frequency response 54 Figure 58 Test circuit for voltage transformer frequency response 55 Figure 59 Test circuit for frequency response of current transformer 55 Figure 60 Test circuit for the frequency response of the current transformer 56 Figure 61 Digital output electronic current transformer test device 57 Figure 62 Test device for analog output of electronic current transformer 58 Figure C.1 Example of "unrealistic descent" 65 Table 1 Power quality disturbance in GB/T 17626.30-2012 and its measurement interval 7 Table 2 Influence of transformer parameters on power quality measurement 12 Table 3 The main components of the electromagnetic voltage transformer with a voltage range of 1kV (inclusive) ~ 52kV (inclusive) 15 Table 4 The influence of electromagnetic voltage transformers with a voltage range of 1kV (inclusive) to 52kV (inclusive) on the measurement of power quality parameters 16 Table 5 Measurement of power quality parameters of electromagnetic voltage transformers with a voltage range of 52kV (excluding) to 1100kV (inclusive) Influence 18 Table 6 The main components of the electromagnetic current transformer with a voltage range of 1kV (inclusive) ~ 52kV (inclusive) 19 Table 7 The influence of electromagnetic current transformers with a voltage range of 1 kV (inclusive) to 52 kV (inclusive) on the measurement of power quality parameters 21 Table 8 The main components of the electromagnetic current transformer with a voltage range of 52kV (excluding) to 1100kV (inclusive) 22 Table 9 Measurement of power quality parameters of electromagnetic current transformers with a voltage range of 52kV (excluding) to 1100kV (inclusive) Impact 24 Table 10 Influence of capacitive voltage transformer on power quality parameter measurement 28 Table 11 Influence of capacitive voltage transformer with harmonic measurement terminal on power quality parameter measurement 30 Table 12 Accuracy level of power measurement 30 Table 13 Accuracy level of power quality measurement 31 Table 14 Influence of optical voltage transformer on power quality parameter measurement 35 Table 15 Influence of medium voltage resistance voltage divider on power quality parameter measurement 38 Table 16 Influence of capacitive voltage divider on power quality parameter measurement 39 Table 17 Influence of resistance-capacitance voltage divider on power quality parameter measurement 42 Table 18 Influence of optical current transformer on power quality parameter measurement 44 Table 19 Main components of low power current transformer 45 Table 20 Influence of low-power current transformers on power quality parameter measurement 46 Table 21 Main components of Roche sensors 48 Table 22 Influence of Rogowski coil current transformer on power quality parameter measurement 48 Table 23 Influence of shunt on power quality parameter measurement 50 Table 24 The effect of Hall effect sensors on the measurement of power quality parameters 53 Table 25 Requirements for power quality parameters on voltage and current transformers 53 Table 26 Test current and voltage of common accuracy level 56 Table 27 Test current and voltage for special accuracy level 56 Table A.1 Comparison between this part and IEC TR61869-103..2012 chapter number 59 Table A.2 Comparison between this part and IEC TR61869-103..2012 drawings, table numbers 60 Table B.1 The technical differences between this part and IEC TR61869-103..2012 and their causes 61 Table D.1 Examples of recommended main requirements for accuracy testing Table 66ForewordGB/T 20840 "Transformer" is divided into the following parts. --- Part 1.General technical requirements; --- Part 2.Supplementary technical requirements for current transformers; --- Part 3.Supplementary technical requirements for electromagnetic voltage transformers; --- Part 4.Supplementary technical requirements for combined transformers; --- Part 5.Supplementary technical requirements for capacitive voltage transformers; --- Part 6.Supplementary general technical requirements for low power transformers; --- Part 7.Electronic Voltage Transformer; --- Part 8.Electronic Current Transformer; --- Part 9.Digital Interface of Transformer; --- Part 102.Ferromagnetic resonance in substations with electromagnetic voltage transformers; --- Part 103.Application of transformers in power quality measurement. This part is Part 103 of GB/T 20840. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part uses the redrafting method to modify the use of IEC TR61869-103..2012 "Transformer Transformer in Power Quality Measurement application". This part is structurally adjusted compared to IEC TR61869-103..2012.Appendix A lists this part and IEC TR61869- A comparative list of chapters, articles, figures, and table numbers in 103..2012. There are technical differences between this part and IEC TR61869-103..2012, and the terms involved in these differences have been adopted on the outside pages The vertical single line (|) in the marginal position is marked. Appendix B gives a list of corresponding technical differences and their causes. This section also made the following editorial changes. --- Modified the standard name; --- Chapter 1 adds notes on the high voltage, medium voltage and low voltage voltage ranges; --- 5.2 replaced "IEC /TC38" with "Transformer Professional"; --- D.1 Note content has been adjusted according to the actual situation in my country; --- D.2 changed "10/12cycles" to "10 cycles"; --- Add IEC 60050-311..2001 and IEC 60050-604.1987 in the reference; --- The formulas of the full text are numbered uniformly. This part is proposed by China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC222). This section was drafted by. State Grid Shaanxi Electric Power Research Institute, Shenyang Transformer Research Institute Co., Ltd., Yunnan Power Network Co., Ltd. Electric Power Research Institute, China Electric Power Research Institute Co., Ltd., Dalian First Transformer Co., Ltd., Dalian North Transformer Group Co., Ltd., Jiangsu Kexing Electric Co., Ltd., Zhejiang Skyline Transformer Co., Ltd., Jiangsu Jingjiang Transformer Co., Ltd. have Limited company, Chongqing Shancheng Electric Appliance Factory Co., Ltd., State Grid Jilin Electric Power Co., Ltd. Electric Power Research Institute, State Grid Jiangxi Electric Power Co., Ltd. Division Electric Power Research Institute, State Grid Shanghai Electric Power Company Electric Power Research Institute. The main drafters of this section. Deng Jun, Chen Yixiu, Zhang Xianzhong, Li Yunge, Zhang Xiaoqing, Liu Hongwen, Tong Yue, Sha Yuzhou, Zhao Guoqing, Yang Xiaoxi, Huang Hua, Yang Feng, Tang Fuxin, Xiong Jiangyong, Xu Wen, Li Taochang, Wang Jiyuan, Cai Qiang, Zhao Shixiang, Yan Nianping, Chen Wenzhong. Transformers. Part 103.Transformers in power quality Application in measurement1 ScopeThis part of GB/T 20840 gives the definition and description of power quality parameters, the effect of transformers on power quality measurement and power Quality testing guidance. This section applies to electromagnetic and electronic transformers working in power frequency AC power (power supply) systems, which have analog or digital Power output, power supply gas measuring instrument, used for power quality parameter measurement and result evaluation. This section is intended to provide guidance for the measurement of power quality parameters using high-voltage transformers. The power quality parameters in this part include grid frequency, power supply voltage and current amplitude, flicker, power supply voltage sag and swell, voltage interruption, Transient voltage, unbalanced supply voltage, voltage current harmonics and interharmonics, signal voltage (superimposed) on the supply voltage and fast voltage Variety. Note. The voltage ranges of the low-voltage, medium-voltage and high-voltage electromagnetic transformers mentioned in this section are. the low-voltage is less than 1kV AC voltage level The voltage is 1kV and above, 52kV and below AC voltage level, and the high voltage is above 52kV AC voltage level.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB/T 6592-2010 Electrical and electronic measuring equipment performance representation (IEC 60359..2001, IDT) GB/T 17626.7-2017 Electromagnetic compatibility test and measurement technology Power system and connected equipment harmonic and inter-harmonic measurement and Guidelines for measuring instruments (IEC 61000-4-7..2009, IDT) GB/T 17626.15-2011 Electromagnetic compatibility test and measurement technology scintillator function and design specifications (IEC 61000-4- 15..2003, IDT) GB/T 17626.30-2012 Electromagnetic compatibility test and measurement technology power quality measurement method (IEC 61000-4-30..2008, IDT) GB/T 18039.3-2017 Compatible water for low-frequency conducted disturbance and signal transmission of public low-voltage power supply system in electromagnetic compatibility environment Ping (IEC 61000-2-2..2002, IDT) GB /Z 18039.5-2003 Electromagnetic compatibility environment Electromagnetic environment of low-frequency conduction disturbance and signal transmission of public power supply system (IEC 61000-2-1..1990, IDT) GB/T 18216.12-2010 AC 1000V and DC 1500V and below low-voltage power distribution system electrical safety protection measures Test, measurement or monitoring equipment. Part 12.Performance measurement and monitoring device (PMD) (IEC 61557-12..2007, IDT) GB/T 20840.8-2007 Transformers Part 8.Electronic current transformers (IEC 60044-8..2002, MOD) EN50160..2007 Voltage characteristics of public distribution system power supply (Voltagecharacteristicsofelectricitysuppliedby publicdistributionnetworks)3 Terms and definitionsThe following terms and definitions apply to this document. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20840.103-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 20840.103-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 6 ~ 9 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 20840.103-2020_English with my colleagues?Answer: Yes. 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