GB/T 41135.2-2021 English PDFUS$879.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 41135.2-2021: Current and voltage sensors or detectors, to be used for fault passage indication purposes - Part 2: System aspects Status: Valid
Basic dataStandard ID: GB/T 41135.2-2021 (GB/T41135.2-2021)Description (Translated English): Current and voltage sensors or detectors, to be used for fault passage indication purposes - Part 2: System aspects Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Word Count Estimation: 46,460 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 41135.2-2021: Current and voltage sensors or detectors, to be used for fault passage indication purposes - Part 2: System aspects---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. Current and voltage sensors or detectors, to be used for fault passage indication purposes -- Part 2: System aspects ICS 29:180 CCSK41 National Standards of People's Republic of China Fault path indication with current and voltage sensors or Detectors Part 2: System Applications (IEC 62689-2:2016, MOD) Published on 2021-12-31 2022-07-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 FPI/DSU selection requirements for fault detection based on grid operation mode and fault type 2 5 Principles of fault detection based on grid and fault type 6 Appendix A (Informative) Example of Fault Detection for FPI or DSU in Ring Network 30 Appendix B (informative) Examples of fault detection coordination techniques between FPI/DSU and medium voltage feeder relay protection 35 Reference 39 Figure 1 General structure of FPI V Fig: 2 Three-phase diagram of ground fault in unearthed neutral system Fig: 6 Figure 3 Three-phase figure for ground fault in a directly grounded system Figure 7 Figure 4 Ungrounded neutral system --- FPI/DSU ground fault current direction upstream of fault (fault is located downstream of FPI/DSU) Probe 9 Figure 5 Ungrounded neutral system --- FPI/DSU ground fault current direction downstream of fault (fault is located upstream of FPI/DSU) Probe 9 Figure 6 Vector diagram 10 for the ungrounded neutral system of Figures 4 and 5 Fig:7 Relationship between FPI/DSU current setting and ground fault current in non-directional fault detection (fault is located in FPI/DSU A4-2 downstream) 11 Fig:8 Relationship between FPI/DSU current setting and ground fault current in non-directional fault detection (fault is located in FPI/DSU A4-1 downstream and upstream of FPI/DSU A4-2) 12 Fig: 9 Relationship between FPI/DSU current setting and ground fault current in non-directional fault detection (fault on MV bus and at upstream of any FPI/DSU) 13 Figure 10 Pure resonant grounding system --- The direction of the ground fault current is detected by the FPI/DSU upstream of the fault point (the fault is located at downstream of FPI/DSU) 15 Figure 11 Pure resonant grounding system - the direction of the ground fault current is detected by the FPI/DSU downstream of the fault point (the fault is located at upstream of FPI/DSU) 15 Figure 12 Vector diagram 16 for the purely resonant grounded system of Figures 10 and 11 Fig: 13 Resonant grounding of the permanent shunt resistance of the inductor - detection of the direction of the fault current relative to ground by the FPI/DSU upstream of the fault (Fault is downstream of FPI/DSU) 18 Fig: 14 Resonant grounding system with short-term parallel resistance of inductance --- FPI/DSU downstream of the fault conducts phase-to-ground fault current direction Probe (fault is upstream of FPI/DSU) 18 Figure 15 Vector diagram of the resonant grounding system with respect to the conductance parallel resistance of Figures 13 and 14 19 Figure 16 Resistive grounding system - detection of the direction of the phase-to-ground fault current by the FPI/DSU upstream of the fault (the fault is located at Downstream of FPI/DSU) 22 Figure 17 Resistance grounding system - detection of the direction of the phase-to-ground fault current by the FPI/DSU downstream of the fault (the fault is located at upstream of FPI/DSU) 23 Figure 18 Vector diagram 23 for the resistive grounding system of Figures 16 and 17 Figure 19 Overcurrent in radial grid without DG presence - correct current using non-directional FPI/DSU Detection (very good sensitivity relative to overcurrent detection) 26 Figure 20 Negligible radial grid overcurrent for distributed power generation - correct fault detection with non-directional FPI/DSU (very good sensitivity relative to overcurrent detection) 27 Figure 21 Overcurrent in radial grid with a large number of distributed power sources—unreliable fault detection using non-directional FPI/DSU (incorrect detection results or extremely low sensitivity) 28 Figure A:1 Two-port 30 Figure A:2 Two-port cascade 31 Figure A:3 Closed-loop two-port 33 Figure A:4 Equivalent model in case of failure33 Figure B:1 Correct coordination between FPI/DSU and relay protection fault selection 36 Figure B:2 Fault selection of incorrect cooperation between FPI/DSU and relay protection (case 1) 37 Figure B:3 Fault selection of incorrect cooperation between FPI/DSU and relay protection (case 2) 38 Table 1 Summary of requirements for fault detection FPI/DSU according to grid operation mode and fault type4 forewordThis document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted: This document is Part 2 of GB/T 41135 "Current and Voltage Sensors or Detectors for Fault Path Indication": GB/T 41135 The following sections have been published: --- Part 1: General principles and requirements; --- Part 2: System applications: This document uses the redrafted method to modify the use of IEC 62689-2:2016 "Current and voltage sensors or detectors for fault path indication Part 2: System Applications": The technical differences between this document and IEC 62689-2:2016 and their reasons are as follows: --- In order to adapt to my country's national conditions, the normative references in Chapter 2 are replaced by GB/T 41135:1, which has been modified and adopted international standards: IEC 62689-1: The following editorial changes have also been made to this document: --- The scope has been rewritten; --- In order to adapt to my country's national conditions, the content of Note 2 in 3:1:1 has been deleted; --- Correct the error in the IEC standard, in paragraph 1 of 5:2:3:4 (5:2:5 in this document), change "see 5:2:4" to "see 5:2:4" Figure 3"; in paragraph 1 of 5:2:4:2 (5:2:6:2 in this document), delete "Figure 21"; in Figure A:4 and formula (A:13), use "I 2,rsd" replaces "I" in the IEC standard 2,0"; in paragraph 9 of B:1, use "A2(FPI/DSU 2)" and "A3(FPI/ DSU 3)" replaces "A3 (FPI/DSU 3)" and "A4 (FPI/DSU 4)" in the IEC standard, respectively: In the latter paragraph, replace "FPI/DSU (A1 or A2)" in the IEC standard with "FPI/DSU (A2 or A3)"; --- Adjust 5:2:3:3 and 5:2:3:4 of the IEC standard to 5:2:4 and 5:2:5 respectively, and the numbers of other clauses shall be extended in turn; ---Improved the symbols and descriptions of some electrical graphics; --- The formulas in Appendix A are numbered uniformly; --- References have been adjusted: Please note that some content of this document may be patented: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Electrical Equipment Industry Association: This document is under the jurisdiction of the National Standardization Technical Committee of Transformers (SAC/TC222): This document is drafted by: Electric Power Research Institute of State Grid Sichuan Electric Power Company, Shenyang Transformer Research Institute Co:, Ltd:, Sichuan Giant Tang Technology Co:, Ltd:, Harbin Institute of Technology, Electric Power Research Institute of Yunnan Power Grid Co:, Ltd:, Dalian First Transformer Co:, Ltd: Company, Yunnan Electric Power Research Institute (Group) Co:, Ltd:, Jiangsu Jingjiang Transformer Co:, Ltd:, Zhejiang Tianji Transformer Co:, Ltd:, Dalian North Transformer Group Co:, Ltd:, Chongqing Shancheng Electric Appliance Factory Co:, Ltd:, State Grid Shaanxi Electric Power Company Electric Power Research Institute, State Grid Jilin Electric Power Co:, Ltd: Electric Power Research Institute: The main drafters of this document: Li Fuchao, Yan Ping, Zhang Zhongguo, Zhang Xianzhong, Tang Yong, Li Jinsong, Ai Bing, He Dake, Yu Wenbin, Liu Hongwen, Sha Yuzhou, Tian Qingsheng, Xiong Jiangyong, Tang Fuxin, Zhao Ridong, Xu Wen, Chen Yiqi, Zhang Zhihua, Zhao Shixiang:Introduction0:1 Overview GB/T 41135 is a series of standards for current and voltage sensors or detectors for fault path indication: Fault Path Indication It can be achieved by appropriate equipment or functions, and can be divided into two categories according to their performance: one is the fault path indicator (FPI), and the other is the fault path indicator (FPI): The class is the power distribution unit (DSU): Different regions of the world have different names for fault path indicators, which also depend on their ability to detect different types of faults: E:g: --- Fault detector; ---Intelligent sensor; --- Fault circuit indicator (FCI); --- Short circuit indicator (SCI); --- Earth Fault Indicator (EFI); --- Test point fault circuit indicator; ---Comprehensive fault indicator: A simpler version that uses only local information/signaling and/or local communication for fault path indication is called FPI, a more advanced version Known as DSU: The latter is based on IEC 60870-5 and IEC 61850 communication protocols and is designed for smart grids: compared to transformers In other words, digital communication technology will continue to change with future development needs: Since such devices are not yet widely used in the industry, in-depth experience on the deep integration of electronic equipment and transformers needs to be further developed: Accumulate on a broad basis: In addition to the basic functions of FPI, DSU can optionally integrate other auxiliary functions, such as: --- Voltage with/without detection function for medium voltage network automation, regardless of the presence of distributed energy sources [not used for fault confirmation (according to the fault detection method used, fault acknowledgment can be used as a basic FPI function), nor is it used for safety protection covered by IEC 61243-5: All relevant aspects]; ---In various practical applications (such as: medium voltage grid automation, monitoring power flow, etc:), measuring voltage, current, active power, reactive power power, etc:; --- Manage the smart grid with suitable interfaces (e:g: voltage control and undesired island operation); --- Output the collected information in situ through a suitable interface; --- Remote transmission of collected information; ---other: A general FPI schematic is shown in Figure 1: DSUs usually have a more complex structure: Index number description: A---current sensor (there is also a voltage sensor if necessary), monitoring single-phase or three-phase; B---Signal transmission between sensor and electronic unit; C---In-place indicators (indicators, LEDs, markers, etc:); D---Analog, digital and/or communication input/output for remote signaling/remote control (hard wired and/or wireless); E---Connect with the field device; F---Signal conditioning and indicating unit; G---Power supply: Current sensors can detect fault current paths without any circuit connection to each phase (eg: feed-through current sensors, magnetic field sensors): FPI does not have to have all of the above functions, it depends on its own complexity and technology: But at least one of the functions in C or D: Figure 1 General structure of FPI 0:2 Relationship of this document to the IEC 61850 series IEC 61850 is a set of international standards for communications and systems supporting power automation: The GB/T 41135 series of standards also introduces a set of special namespaces to support the integration of FPI/DSU and power automation: In addition, this series of standards also defines appropriate data models and different communication interface profiles to support different applications of FPI/DSU Scenes: For the most complex versions of FPIs (eg: DSUs commonly used in smart grids), some application scenarios rely on extended substation's concept, this extended substation concept is used to realize intelligent electronic devices (IEDs) distributed on medium voltage feeders and located in the main substation: Between intelligent electronic devices (IEDs), IEC 61850 is used for communication: This configuration mode will not be restricted to FPI/DSU devices, but will Contains the characteristics required for the sub-substations where the main substation extends to the outgoing lines: Fault path indication with current and voltage sensors or Detectors Part 2: System Applications1 ScopeThis document describes electrical phenomena and power system responses during faults according to the most widely used distribution system architectures and fault topologies, This defines the functionality of the Fault Path Indicator (FPI) and the Power Distribution Unit (DSU) (including current and/or voltage sensors for the FPI, DSU) sexual requirements: FPI and DSU are a single device or a combination of multiple devices/functions that can be used to detect faults and indicate the location of the fault: This document is intended to guide the user according to the adopted scheme and operating rules (which are customary, and/or depend on national statutes to provide Constraints on electrical continuity and power quality), selecting the appropriate FPI/DSU and proper operating scheme: Note 1: Fault location refers to the location relative to the FPI/DSU installation point in the grid (upstream or downstream of the FPI/DSU location) or the fault current through the FPI/DSU Orientation of DSU: Considering the characteristics and operating conditions of the power system with the FPI/DSU installed, the fault location can be: --- Derived directly from the FPI/DSU, or; ---From a centralized system that uses more FPI or DSU information: Note 2: This document mainly focuses on the system response during the fault, which is classified by the FPI/DSU fault detection capability level described in GB/T 41135:1 "Core basis", all the requirements in GB/T 41135:1 are specified in detail:2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document: GB/T 41135:1 Current and voltage sensors or detectors for fault path indication - Part 1: General principles and requirements (GB/T 41135:1-2021,IEC 62689-1:2016,MOD)3 Terms and DefinitionsThe terms and definitions defined in GB/T 41135:1 and the following apply to this document: 3:1 Terms and Definitions Related to Neutral Grounding 3:1:1 arc-suppression coil It is connected between the neutral point and the ground of the power system to compensate for the phase-to-ground capacitive current in the case of a single-phase ground fault (resonance-ground system): Reactor: NOTE: In order to make ground fault detection and/or fault removal easier, a pure reactor with a high quality factor Q is usually used instead of a resistive-reactive impedance: [Source: GB/T 2900:95-2015, 3:4:10] 3:2 Abbreviations and symbols Abbreviations and symbols defined in GB/T 41135:1 apply to this document: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 41135.2-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 41135.2-2021_English as soon as possible, and keep you informed of the progress. 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