Siemens SINAMICS S120 System Manual page 8

Table of contents
5.3.5 Additional closed-loop controls function module .................................................................... 47
5.3.5.1 Reactive current/apparent current limits ................................................................................ 47
6 Detailed descriptions of the function modules ........................................................................................ 49
6.1 Additional closed-loop controls for current-controlled operation ............................................ 49
6.1.1 Background information ......................................................................................................... 49
6.1.2 Dynamic grid support ............................................................................................................. 50
6.1.3 DC component controller ....................................................................................................... 52
6.1.4 Negative sequence system current controller ........................................................................ 53
6.1.5 Grid-friendly transformer magnetization ................................................................................ 54
6.2 Controls for grid droop operation ........................................................................................... 55
6.2.1 Background information ......................................................................................................... 55
6.2.2 U-f droop control .................................................................................................................... 59
6.2.3 Damping power oscillations ................................................................................................... 62
6.2.4 DC component controller ....................................................................................................... 63
6.3 Supplementary functions ....................................................................................................... 63
6.3.1 Grid voltage sensing using an additional VSM10 .................................................................. 63
6.3.2 Transformer model and identification .................................................................................... 64
6.4 Back-to-back operation of Active Line Modules ..................................................................... 65
7 Commissioning ..................................................................................................................................... 67
7.1 Safety notices ......................................................................................................................... 67
7.2 Preconditions ......................................................................................................................... 68
7.3 Basic commissioning ............................................................................................................. 69
7.3.1 Infeed units in the chassis format .......................................................................................... 69
7.3.2 Infeed units in the booksize format ........................................................................................ 69
7.4 Commissioning example for an infeed with voltage and frequency control for an island
grid. ........................................................................................................................................ 70
7.4.1 Design .................................................................................................................................... 70
7.4.2 General information ............................................................................................................... 71
7.4.3 Function modules for creating a line infeed in an island grid ................................................. 72
7.4.4 Creating an additional VSM10 ............................................................................................... 72
7.4.5 Adapting the topology and the VSM10 assignments ............................................................. 73
7.4.6 Performing additional parameter settings in the expert list .................................................... 74
7.4.7 Signal interfaces..................................................................................................................... 83
7.5 Commissioning example of an infeed with dynamic grid support for a power grid ................ 86
7.5.1 Design .................................................................................................................................... 86
7.5.2 General information ............................................................................................................... 88
7.5.3 Function modules for creating a line infeed in a power grid .................................................. 89
7.5.4 Creating an additional VSM10 ............................................................................................... 89
7.5.5 Adapting the topology and the VSM10 assignments ............................................................. 90
7.5.6 Performing additional parameter settings in the expert list .................................................... 90
7.5.7 Additional parameter settings for grid monitoring .................................................................. 96
7.5.8 Signal interfaces................................................................................................................... 100
7.6 Commissioning the grid transformer .................................................................................... 102
7.6.1 Commissioning grid-friendly transformer magnetization ..................................................... 102
7.6.2 Overview of important parameters ....................................................................................... 108
7.6.3 Function block diagrams ...................................................................................................... 110
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System Manual, 04/2015, A5E03347436A
Grid infeed