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BSI PD IEC/TR 61000-3-15:2011

BSI PD IEC/TR 61000-3-15:2011

$198.66

Electromagnetic compatibility (EMC) – Limits. Assessment of low frequency electromagnetic immunity and emission requirements for dispersed generation systems in LV network

Published By Publication Date Number of Pages
BSI 2011 54
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This part of IEC 61000 is concerned with the critical assessment of existing and emerging national and international standards for single and multi-phase dispersed generation systems up to 75 A per phase, particularly converters connected to the public supply low voltage network, to serve as a starting point and to ultimately pave the way for the definition of appropriate EMC requirements and test conditions. This Technical Report is limited to EMC issues (immunity and emission) up to 9 kHz and does not include other aspects of connection of generators to the grid.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Terms and definitions
12 3 General
13 4 Classification of DG generators
4.1 General
4.2 Induction (asynchronous) generators
14 4.3 Synchronous generators
4.4 Static power converters
5 Survey of EMC requirements for DG
15 Tables

Table 1 – DG specifications and emission requirements applied in different countries
17 6 Proposed EMC requirements and tests
6.1 General test requirements
18 Figures

Figure 1 – General test setup for combined emission/immunity tests
19 6.2 Proposed tests
Table 2 – Proposed EMC requirements and tests for DG equipment
20 7 Emission
7.1 General
7.2 Harmonics
23 Table 3 – Different suggested product and system tests for harmonic emissions
24 Table 4 – Voltage distortion of simulated public supply (IEC 61000-3-2)
Table 5 – Voltage distortion of simulated public supply (IEC 61000-3-12)
25 7.3 Unbalance
Table 6 – Limits for DG up to 75 A/phase (in percent of Irms)
Table 7 – Distortion values for a flat top and peaky voltage distortion V-THD of 4,0 %
26 7.4 Voltage fluctuation and flicker
28 7.5 DC injection
7.6 Short duration over voltages
29 Figure 2 – Over voltages produced during DG quick disconnection
Figure 3 – Over voltages produced during DG slow disconnection (greater than 10 ms)
30 Figure 4 – CBEMA curve (IEC 61000-2-14)
31 7.7 Switching frequencies
32 8 Immunity

8.1 General
33 8.2 Voltage dips and short interruptions
34 Figure 6 – Voltage dips and short interruption test levels from different standards
35 Figure 7 – Voltage tolerance curves for DG immunity requirements
36 Table 8 – Protection requirements for PV inverters under voltage disturbances
38 Figure 8 – DG immunity test for short dips/interruptions: an example
Figure 9 – Test pattern for a DG voltage dip tolerance curve
39 8.3 Frequency variations
40 Table 9 – Protection requirements for PV inverters under frequency disturbances
41 8.4 Harmonics and interharmonics
Figure 10 – DG frequency variation (increment) immunity test: an example
42 Table 10 – Harmonic voltage disturbance levels for odd harmonics (IEC 61000-4-13)
43 Annex A (informative)
Examples of harmonic measurements and analysis on DG equipment connected to low voltage networks
Figure A.1 – Total current distortion due the network and the connected inverter
44 Figure A.2 – Harmonic distortions at different input power of a 5 kW inverter
Figure A.3 – DG equipment with LCL filter
45 Figure A.4 – Impedance model for DG equipment with LCL filter
Table A.1 – THD of increasing numbers of AICs with LCL filters connected to the network
46 Figure A.5 – Voltage spectrum: four AICs connected
Figure A.6 – Current harmonics: four AICs at 10 A r.m.s. (0,11 IN)
48 Bibliography

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