Adoption Standard – Active. IEC\/TR 61000-3-7:2008 is adopted by this guide. IEC 61000-3-7:2008 provides guidance on the principles that can be used as the basis for determining the requirements for the connection of fluctuating installations to MV, HV, and EHV power systems (LV installations are covered in other IEC documents). The primary objective of this guide is to provide guidance to system operators or owners on engineering practices that will facilitate adequate service quality for all connected customers. This guide provides a methodology to allocate the capacity of the system to absorb voltage fluctuations (i.e., flicker). However, it does not address how to mitigate voltage fluctuations, nor does it address how to increase the capacity of the system to absorb such disturbances. Since the procedures outlined in this guide are necessarily based on certain simplifying assumptions, the approach will not always provide an optimum solution. The recommended approach should be used with flexibility and engineering judgment, when applying the given assessment procedures in full or in part.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | IEEE Std 1453.1-2012 Front Cover <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | Title page <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Notice to users Laws and regulations Copyrights Updating of IEEE documents Errata Patents <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Important notice Important Notice <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Participants Participants <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | IEEE Introduction IEEE Introduction <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | IEC\/TR 61000-3-7 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | ACKNOWLEDGMENT <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 4 Basic EMC concepts related to voltage fluctuations <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 4.1 Compatibility levels 4.2 Planning levels Tables Table 1 \u2013 Compatibility levels for flicker in low voltage systems reproduced from IEC 61000-2-2 <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 2 \u2013 Indicative values of planning levels for flicker in MV, HV and EHV power systems <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 4.3 Illustration of EMC concepts <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 4.4 Emission levels Figures Figure 1 \u2013 Illustration of basic voltage quality concepts with time\/ location statistics covering the whole system Figure 2 \u2013 Illustration of basic voltage quality concepts with time statistics relevant to one site within the whole system <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5 General principles 5.1 Stage 1: simplified evaluation of disturbance emission 5.2 Stage 2: emission limits relative to actual system characteristics <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.3 Stage 3: acceptance of higher emission levels on a conditional basis 5.4 Responsibilities 6 General guidelines for the assessment of emission levels 6.1 Point of evaluation <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 6.2 Definition of flicker emission level 6.3 Assessment of flicker emission levels <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 6.4 Declared system short circuit power or impedance 6.5 General guidelines for assessing the declared system impedance 7 General summation law <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 8 Emission limits for fluctuating installations connected to MV systems 8.1 Stage 1: simplified evaluation of disturbance emission Table 3 \u2013 Stage 1 limits for the relative changes in power as a function of the number of changes per minute <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 8.2 Stage 2: emission limits relative to actual system characteristics Figure 3 \u2013 Example of a system for sharing global contributions at MV <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 8.3 Stage 3: acceptance of higher emission levels on a conditional basis Table 4 \u2013 Minimum emission limits at MV <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 8.4 Summary diagram of the evaluation procedure <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure 4 \u2013 Diagram of evaluation procedure <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 9 Emission limits for fluctuating installations connected to HV or EHV systems 9.1 Stage 1: simplified evaluation of disturbance emission 9.2 Stage 2: emission limits relative to actual system characteristics Figure 5 \u2013 Determination of St for a simple HV or EHV system <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure 6 \u2013 Determination of St for a meshed HV or EHV system <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 9.3 Stage 3: acceptance of higher emission levels on a conditional basis Table 5 \u2013 Minimum emission limits at HV-EHV <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 10 Rapid voltage changes 10.1 General considerations Figure 7 \u2013 Equivalent circuit and vector diagram for simple assessments Figure 8 \u2013 Example rapid voltage change associated with motor starting <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 10.2 Compatibility level 10.3 Planning levels Figure 9 \u2013 Example rapid voltage change associated with capacitor switching <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 10.4 Emission limits 10.5 Assessment procedure for evaluation against planning levels & emission limits Table 6 \u2013 Indicative planning levels for rapid voltage changes as a function of the number of such changes in a given period <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Annex A (informative) Pst = 1 curves and numerical data for 230 V and 120 V applications Figure A.1 \u2013 Pst = 1 curve for regular rectangular voltage changes [13] Table A.1 \u2013 Input relative voltage fluctuation (V\/V for Pst=1,0 at output [13] <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex B (informative) Guidelines on the assessment of flicker transfer coefficient Table B.1 \u2013 Example of flicker transfer coefficients <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Annex C (informative) Example of reallocation of global contributions and planning levels considering transfer coefficients <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Annex D (informative) The use of the severity indicators Ast and Alt to simplify calculations Table D.1 \u2013 Compatibility levels for Ast and Alt in LV and MV power systems Table D.2 \u2013 Indicative values of planning levels for Ast and Alt in MV, HV and EHV power systems <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Annex E (informative) Pre-connection and post-connection assessment of emission for Pst <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Figure E.1 \u2013 Shape factor curve for pulse and ramp changes <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Figure E.2 \u2013 Shape factor curves for double-step and double-ramp changes Figure E.3 \u2013 Shape factor curves for sinusoidal and triangular changes <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Figure E.4 \u2013 Shape factor curves for aperiodic changes <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Figure E.5 \u2013 Accounting for network loading <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Figure E.6 \u2013 System for flicker emission assessment <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Figure E.7 \u2013 Assessment of emission level using current measurements <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Annex F (informative) Addition of Pst from different busbars Figure F.1 \u2013 Example of two loads fed from different busbars <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Annex G (informative) Examples of case studies Figure G.1 \u2013 Example of effect from a rolling mill <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | Figure G.2 \u2013 Example of effect of multiple spot welder load <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | Table G.1 \u2013 Flicker measurements for example G.3, flicker effects, normal operation <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | Figure G.3 \u2013 Example profile of winder reactive power levels <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Figure G.4 \u2013 Normal system configuration <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | Figure G.5 \u2013 Busbars coupled <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Figure G.6 \u2013 “n-1” system configuration <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | Figure G.7 \u2013 Operation without SVC <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | Annex H (informative) List of symbols and subscripts <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" IEEE Guide–Adoption of IEC\/TR 61000-3-7:2008, Electromagnetic compatibility (EMC)–Limits–Assessment of emission limits for the connection of fluctuating installations to MV, HV and EHV power systems<\/b><\/p>\n |