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BSI DD IEC/TS 61800-8:2010

BSI DD IEC/TS 61800-8:2010

$198.66

Adjustable speed electrical power drive systems – Specification of voltage on the power interface

Published By Publication Date Number of Pages
BSI 2010 68
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This part of IEC 61800 gives the guidelines for the determination of voltage on the power interface of power drive systems (PDS’s).

NOTE The power interface, as defined in the IEC 61800 series, is the electrical connection used for the transmission of the electrical power between the converter and the motor(s) of the PDS.

The guidelines are established for the determination of the phase to phase voltages and the phase to ground voltages at the converter and at the motor terminals.

These guidelines are limited in the first issue of this document to the following topologies with three phase output

  • indirect converter of the voltage source type, with single phase diode rectifier as line side converter;

  • indirect converter of the voltage source type, with three phase diode rectifier as line side converter;

  • indirect converter of the voltage source type, with three phase active line side converter.

All specified inverters in this issue are of the pulse width modulation type, where the individual output voltage pulses are varied according to the actual demand of voltage versus time integral.

Other topologies are excluded of the scope of this International Specification.

Safety aspects are excluded from this Specification and are stated in IEC 61800-5 series. EMC aspects are excluded from this Specification and are stated in IEC 61800-3.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Overview and terms and definitions
3.1 Overview of the system
12 3.2 Terms and definitions
Figures
Figure 1 – Definition of the installation and its content
15 Figure 2 – Voltage impulse wave shape parameters in case of the two level inverter where rise time tri = t90 – t10
Figure 3 – Example of typical voltage curves and parameters of a two level inverter versus time at the motor terminals (phase to phase voltage)
16 Figure 4 – Example of typical voltage curves and parameters of a three level inverter versus time at the motor terminals (phase to phase voltage)
17 4 System approach
4.1 General
4.2 High frequency grounding performance and topology
4.3 Two-port approach
Figure 5 – Voltage source inverter (VSI) drive system with motor
18 4.4 Differential mode and common mode systems
Figure 6 – Amplifying two-port element
Figure 7 – Adding two-port element
19 Figure 8 – Differential mode and common mode voltage system
Figure 9 – Voltages in the differential mode system
20 Figure 10 – Block diagram of two-port elements to achieve the motor terminal voltage in the differential mode model
Figure 11 – Equivalent circuit diagram for calculation of the differential mode voltage
21 Figure 12 – Block diagram of two-port elements to achieve the motor terminal voltage in the common mode model
22 Figure 13 – Equivalent circuit diagram for calculation of the common mode voltage
23 5 Line section
5.1 General
5.2 TN-Type of power supply system
24 5.3 IT-Type of power supply system
5.4 Resulting amplification factors in the differential mode model of the line section
5.5 Resulting contribution of the line section in the common mode model
Figure 14 – TN-S power supply system left: kC0 = 0, right: kC0 = 1/ SQR 3
Tables
Table 1 – Amplification factors in the differential mode model of the line section
Table 2 – Factors in the common mode model of the line section
25 6 Input converter section
6.1 Analysis of voltages origins
6.2 Indirect converter of the voltage source type, with single phase diode rectifier as line side converter
26 Figure 15 – Typical configuration of a voltage source inverter with single phase diode rectifier supplied by L and N from a TN or TT supply system
Figure 16 – Typical configuration of a voltage source inverter with single phase diode rectifier supplied by L1 and L2 from an IT supply system
27 Figure 17 – Typical configuration of a voltage source inverter with single phase diode rectifier supplied by L1 and L2 from a TN or TT supply system
28 6.3 Indirect converter of the voltage source type, with three phase diode rectifier as line side converter
Figure 18 – Typical DC voltage Vd of single phase diode rectifier without breaking mode. BR is the bleeder resistor to discharge the capacitor
Table 3 – Maximum values for the potentials of single phase supplied converters at no load conditions (without DC braking mode)
29 Figure 19 – Typical configuration of a voltage source inverter with three phase diode rectifier
Figure 20 – Voltage source with three phase diode rectifier supplied by a TN or TT supply system
30 Figure 21 – Voltage source with three phase diode rectifier supplied by an IT supply system
Figure 22 – Voltage source with three phase diode rectifier supplied from a delta grounded supply system
31 Figure 23 – Typical relation of the DC link voltage versus load of the three phase diode rectifier without braking mode
Table 4 – Maximum values for the potentials of three phase supplied converters at no load conditions (without DC braking mode)
32 6.4 Indirect converter of the voltage source type, with three phase active line side converter
Figure 24 – Typical configuration of a VSI with three phase active infeed converter
Figure 25 – Voltage source with three phase active infeed supplied by a TN or TT supply system
33 6.5 Resulting input converter section voltage reference potential
Figure 26 – Voltage source with three phase active infeed supplied by a IT supply system
34 6.6 Grounding
6.7 Multipulse application
6.8 Resulting amplification factors in the differential mode model of the rectifier section
Table 5 – Typical range of values for the reference potentials of the DC link voltage, the DC-link voltages themselves and the grounding potentials in relation to supply voltage as “per unit value” for different kinds of input converters sections
35 6.9 Resulting amplification factors in the common mode model of the rectifier section
7 Output converter section (inverter section)
7.1 General
7.2 Input value for the inverter section
7.3 Description of different inverter topologies
Table 6 – Amplification factors in the differential mode model of the rectifier section
Table 7 – Amplification factors in the common mode model of the rectifier section
36 Figure 27 – Topology of a N = 2 level voltage source inverter
Figure 28 – Topology of a N=3 level voltage source inverter (neutral point clamped)
37 Figure 29 – Topology of a N = 3 level voltage source inverter (floating symmetrical capacitor)
Table 8 – Number of levels in case of floating symmetrical capacitor multi level
38 Figure 30 – Topology of a three level voltage source inverter (multi DC link), ndcmult = 1. The voltages Vdx are of the same value
39 7.4 Output voltage waveform depending on the topology
Figure 31 – Topology of an N-level voltage source inverter (multi DC link), ndcmult = 2
Table 9 – Number of levels in case of multi DC link inverter
40 7.5 Rise time of the output voltages
Table 10 – Peak values of the output voltage waveform
41 7.6 Compatibility values for the dv/dt
Table 11 – Typical ranges of expected dv/dt at the semiconductor terminals
Table 12 – Example for a single voltage step in a three level topology
42 Table 13 – Expected voltage step heights for single switching steps of an n level inverter
Table 14 – Example for multi steps in a three level topology
Table 15 – Biggest possible voltage step size for multi steps
43 7.7 Repetition rate
7.8 Grounding
Table 16 – Repetition rate of the different voltages depending on the pulse frequency
Table 17 – Relation between fP and fSW
44 7.9 Resulting amplification effect in the differential mode model of the inverter section
7.10 Resulting additive effect in the common mode model of the inverter section
7.11 Resulting relevant dynamic parameters of pulsed common mode and differential mode voltages
8 Filter section
8.1 General purpose of filtering
Table 18 – Resulting amplification factors in the differential mode model
Table 19 – Resulting additive effect (amplification factors) in the common mode model
Table 20 – Resulting dynamic parameters of pulsed common mode and differential mode voltages
45 8.2 Differential mode and common mode voltage system
8.3 Filter topologies
46 Figure 32 – Basic filter topology
47 Figure 33 – Topology of a differential mode sine wave filter
Figure 34 – Topology of a common mode sine wave filter
48 Figure 35 – EMI filter topology
49 8.4 Resulting amplification effect in the differential mode model after the filter section
8.5 Resulting additive effect in the common mode model after the filter section
Figure 36 – Topology of the output choke
Table 21 – Typical resulting differential mode filter section parameters for different kinds of differential mode filter topologies
Table 22 – Typical resulting common mode filter section parameters for different kinds of common mode filter topologies
50 9 Cabling section between converter output terminals and motor terminals
9.1 General
Figure 37 – Example of converter output voltage and motor terminal voltage with 200 m motor cable
51 9.2 Cabling
9.3 Resulting parameters after cabling section
Table 23 – Resulting reflection coefficients for different motor frame sizes
52 10 Calculation guidelines for the voltages on the power interface according to the section models
Table 24 – Typical resulting cabling section parameters for different kinds of cabling topologies
53 Figure 38 – Differential mode equivalent circuit
54 11 Installation and example
11.1 General
11.2 Example
Figure 39 – Common Mode Equivalent Circuit
55 Table 25 – Result of amplification factors and additive effects according to the example configuration and using the models of chapters 5 to 9
56 Figure 40 – Resulting phase to ground voltage at the motor terminals for the calculated example under worst case conditions
Figure 41 – Resulting phase to phase voltage at the motor terminals for the calculated example under worst case conditions
57 Figure 42 – Example of a simulated phase to ground and phase to phase voltages at the motor terminals (same topology as calculated example, TN- supply system, 50 Hz output frequency, no filters, 150 m of cabling distance, type NYCWY, grounding impedance about 1 mΩ)
58 Annex A (informative) Different types of power supply systems
Figure A.1 – TN-S system
59 Figure A.2 – TN-C-S power supply system – Neutral and protective functions combined in a single conductor as part of the system TN-C power supply system – Neutral and protective functions combined in a single conductor throughout the system
Figure A.3 – TT power supply system
60 Figure A.4 – IT power supply system
Figure A.5 – Example of stray capacitors to ground potential in an installation
61 Figure A.6 – Example of a parasitic circuit in a TN type of system earthing
62 Figure A.7 – Example of a parasitic current flow in an IT type of system earthing
63 Annex B (informative) Inverter voltages
Table B.1 – Typical harmonic content of the inverter voltage waveform (Total distortion ratio – see IEC 61800-3 for definition)
64 Annex C (informative) Output filter performance
Table C.1 – Comparison of the performance of differential mode filters
Table C.2 – Comparison of the performance of common mode filters
65 Bibliography

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BSI DD IEC/TS 61800-8:2010
$198.66