GB/T 15544.5-2017 English PDF

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GB/T 15544.5-2017: Short-circuit current calculation in three-phase a.c. systems -- Part 5: Examples
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GB/T 15544.5-2017	874	Add to Cart	4 days	Short-circuit current calculation in three-phase a.c. systems -- Part 5: Examples	Valid

Similar standards

GB/T 33592   GB/T 31960.1   GB/T 12326   GB/T 15544.1   GB/T 15544.3   GB/T 15544.4   

Basic data

Standard ID: GB/T 15544.5-2017 (GB/T15544.5-2017)
Description (Translated English): Short-circuit current calculation in three-phase a.c. systems -- Part 5: Examples
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F20
Classification of International Standard: 29.240.20
Word Count Estimation: 46,464
Date of Issue: 2017-12-29
Date of Implementation: 2018-07-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 15544.5-2017: Short-circuit current calculation in three-phase a.c. systems -- Part 5: Examples

---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.
Short-circuit current calculation in three-phase acsystems - Part 5. Examples ICS 29.240.20 F20 National Standards of People's Republic of China Calculation of Short Circuit Current in Three - phase AC System Part 5. Examples (IEC /T R60909-4..2000, Short-circuit currentinthree-phasea.c.systems- Part 4. Examplesforthecalculationofshort-circuitcurrents, IDT) 2017-12-29 Posted 2018-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ 1 Overview 1 1.1 Scope and purpose 1.2 Normative references 1 1.3 definitions, symbols, coefficients and formulas 1 2 positive sequence of electrical equipment, negative sequence and zero sequence impedance 1 2.1 overhead lines, cables and short-circuit limit reactor 2 2.2 Transformer 2 2.3 Generator and Generator Set 7 3 Un = 400V low voltage system in the short circuit current calculation 10 3.1 Question 10 3.2 Determination of positive sequence impedance 11 3.2.1 Network Feeder 11 3.2.2 Transformer 12 3.2.3 lines (cables and overhead lines) 12 3.3 Zero-sequence impedance determination 13 3.3.1 Transformer 3.3.2 Lines (cables and overhead lines) 13 3.4 Three-phase short-circuit current I "k and ip calculation 13 3.4.1 Short circuit position F1 13 3.4.2 Short-circuit position F2 14 3.4.3 short circuit position F3 15 3.5 single-phase short-circuit point flow I "k1 and ip1 calculated 15 3.5.1 Short circuit position F1 15 3.5.2 Short-circuit position F2 16 3.5.3 Short-circuit position F3 16 3.6 Summary of Results 16 4 medium voltage system in the calculation of three-phase short-circuit current - the impact of the motor 17 4.1 Question 17 4.2 Complex calculation with absolute value 17 4.3 Calculation of short-circuit reactance of electrical equipment 20 4.4 Calculation based on per unit value 21 4.5 using the superposition method of calculation 23 5 generator transformer and auxiliary network three-phase short-circuit current calculation 25 5.1 Question 25 5.2 Electrical equipment short-circuit impedance 27 5.2.1 Network Feeder 27 5.2.2 hair change group 27 5.2.3 Auxiliary Transformer 28 5.2.4 2.5MVA and 1.6MVA low voltage transformer 28 5.2.5 Induction motor 30 5.3 Calculation of short circuit current 31 5.3.1 Short circuit position F1 31 5.3.2 Short-circuit position F2 32 5.3.3 short circuit position F3 33 5.3.4 Short-circuit position F4 35 5.3.5 Short-circuit position F5 37 6 Refer to GB/T 15544.1 Test Network for Short Circuit Current Calculation Using Digital Program 38 6.1 Overview 38 6.2 380kV/110kV/30kV/10kV high voltage test network 39 6.2.1 Network Topology and Data 39 6.2.2 Electrical equipment short-circuit impedance 40 6.3 Results 41 6.3.1 Three-phase short circuit current 41 6.3.2 Line to ground short circuit current 42

Foreword

GB/T 15544 "three-phase AC system short-circuit current calculation" is divided into five parts. --- Part 1. Current calculation; --- Part 2. Short-circuit current calculation of the application of the coefficient; --- Part 3. Electrical equipment data; --- Part 4. Simultaneous two separate single-phase ground fault current and the current flow through the earth; --- Part 5. Example. This section GB/T 15544 Part 5. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method is equivalent to using IEC /T R60909-4..2000 "Three-phase AC system short-circuit current Part 4. Short-circuit current Calculation case ". This section made the following editorial changes. --- In line with the existing standard series, the name of this section read "three-phase AC system short-circuit current calculation Part 5. Example." Our national document, which has a consistent correspondence with the normative references in this section, is as follows. --- GB/T 156-2007 standard voltage (IEC 60038..2002, MOD) --- GB/T 15544.2-2017 Three-phase AC system short-circuit current calculation Part 2. Short-circuit current calculation and application of the coefficient (IEC TR60909-1..2002, IDT) --- GB/T 15544.3-2017 Three-phase AC system short-circuit current calculation Part 3. Electrical Equipment Data (IEC TR60909-2..2008, IDT) --- GB/T 15544.4-2017 three-phase AC system short-circuit current calculation - Part 4. Simultaneous two independent single-phase ground Short-circuit current at short circuit fault and current through the earth (IEC 60909-3..2009, IDT) --- GB/T 35698.1-2017 short-circuit current effects calculation - Part 1. Definition and calculation method (IEC 60865-1..2011, IDT) This part is proposed by China Electricity Council. This part of the national standardization of short-circuit current calculation Technical Committee (SAC/TC424) centralized. This section drafted by. China Electric Power Research Institute, State Grid Corporation of China State Power Dispatching Control Center, Xi'an Jiaotong University. The main drafters of this section. Tang Chung, Li Ming Festival, Bu Guang Quan, Zhang Yan Tao, Zhou Ji, Guo Qiang, Yin Yonghua, Xiao Ti, Jiang Shude, Shen Xuhui, Shi Haobo, Duan Xiangying, Zhang Yuhong, Han Jiahui, Zhao Qiang, Li Jing. Calculation of Short Circuit Current in Three - phase AC System Part 5. Examples

1 Overview

1.1 Scope and purpose This section GB/T 15544 is given in accordance with GB/T 15544.1 50Hz or 60Hz three-phase AC system short-circuit current meter Counting examples. This part includes the modeling of electrical equipment in positive sequence, negative sequence and zero sequence systems (Chapter 2), and low voltage systems (Chapter 3) with Induction motor medium voltage systems (Chapter 4) and power plant systems (auxiliary systems connected to a large number of MV and LV induction motors) (Chapter 5) Examples. The three examples given in Chapter 3, Chapter 4 and Chapter 5 are similar to the ones given in IEC 60909 (1988), but according to GB/T 15544.1-2013 was modified. The third chapter added 3.6, the equivalent voltage source method and the superposition of the calculation results Compared. Chapter 6 provides the wiring diagram and calculation of the test system, as well as short-circuit current calculations based on GB/T 15544.1. The example includes four different voltage levels of 380kV, 110kV, 30kV and 10kV, including power plant equipment, generator, asynchronous motor The calculation results include I "k, ip, Ib, Ik, I" k1 and ip1. This example can be used to test short circuit current computer programs. 1.2 Normative references The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 15544.1-2013 Three-phase AC system short-circuit current calculation - Part 1. Current calculation (IEC 60909-0..2001, IDT) IEC 60038. 1983 IEC standard voltage (IEC Standardvoltages) IEC 60909-1..1991 Short-circuit currents in three-phase AC systems - Part 1. Calculation of three-phase AC systems according to IEC 60909 Short-circuit current calculusinthree-phasea.c.systems-Part 1. Factorsfor thecalculationofshort-circuitcurrentsinthree-phasea.c.systemsaccordingtoIEC 60909) IEC 60909-2..1992 Electric equipment required to perform short-circuit current calculations in accordance with IEC 60909 (Electricalequip- ment-Dataforshort-circuitcurrentcalculationsinaccordancewithIEC 60909) IEC 60909-3..1995 Three-phase AC system short-circuit current calculation - Part 3. Simultaneous two independent single-phase ground fault Of the current and the current through the earth (Short-circuitcurrentscalculationinthree-phasea.c.system-Part 3. Currentsduringtwoseparatesimultaneoussinglephaseline-to-earthshortcircuitsandpartialshort- circuitcurrentsflowingthroughearth) IEC 60865-1..1993 Short-circuit current effects calculation - Part 1. Definition and calculation method (Short-circuitcurrents- Calculation of effects - Part 1. Definitions andcalculation methods) 1.3 Definitions, symbols, coefficients and formulas Definitions, symbols, coefficients and formulas are the same as in GB/T 15544.1. 2 positive sequence of electrical equipment, negative sequence and zero sequence impedance This chapter in Chapter 3 of GB/T 15544.1-2013 gives the electrical equipment of positive sequence, negative sequence and zero sequence impedance modeling and ......

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