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A MULTI-SIGNAL PROC SYS FOR HIGH-SPEED MONITORING-FACTS EQUIP-ELEC POWER SYS-C50 Disclaimer: This document was part of the DSP
Solution Challenge 1995 European Team Papers. It
may have been written by someone whose native
language is not English. TI assumes no liability for the
quality of writing and/or the accuracy of the
information contained herein.

Implementing a Multi Signal Processing
System for High Speed Monitoring of
FACTS-Equipment in Electrical Power
Systems Using the TMS320C50 DSP
Authors: G. Herold, J. Ph. Jager, C.A. Weindl, A.v.
Grafenstein, G. Schmid, C.K. Wehrfritz
EFRIE, France
December 1995
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dsph@ti.com Contents
Abstract ........................................................................................................................... 7
Product Support on the World Wide Web .................................................................... 8
Introduction..................................................................................................................... 9
Description of the Network Online Monitoring System............................................. 11
Peripheral Components and Interfaces .................................................................... 11
Structural Overview .......................................................................................... 11
A/D Converter Systems .................................................................................... 12
D/A Converter Systems .................................................................................... 13
Keyboard/Display Interface............................................................................... 14
Multi-Signal Processing Architecture ........................................................................ 16
Scalable Software Architecture................................................................................. 21
Test Environment and Results .................................................................................... 24
Transient Network Analyzer Test Installation............................................................ 24
Test Results.............................................................................................................. 24
Summary ....................................................................................................................... 28 Figures
Figure 1.
Examples of FACTS Devices ............................................................................. 9
Figure 2.
Schematic Diagram of the Peripheral Components of the NOMS.................... 11
Figure 3.
Schematic Diagram of the A/D Converter Systems.......................................... 12
Figure 4.
Schematic Diagram of the D/A Converter System............................................ 14
Figure 5.
Schematic Diagram of the Keyboard/Display Interface .................................... 16
Figure 6.
Overview of the Central Processing Components ............................................ 17
Figure 7.
Architecture of the DSP Unit............................................................................. 18
Figure 8.
Independent Request Bus Arbitration Method.................................................. 19
Figure 9.
Schematic Overview of the Multiprocessor Interface MPI ................................ 20
Figure 10. Software Architecture of the NOMS (2 of 4 Nodes).......................................... 22
Figure 11. TNS Test Installation ........................................................................................ 24
Figure 12. Schematic Diagram of TNA Test Installation .................................................... 25
Figure 13. Test Results of a 3-Phase Short Circuit (100 ms) ............................................ 26
Figure 14. Test Results of a 3-Phase Short Circuit (1 s) ................................................... 27
Implementing a Multi Signal Processing System for High Speed Monitoring of
7
FACTS-Equipment in Electrical Power Systems Using the TMS320C50 DSP
Implementing a Multi Signal Processing
System for High Speed Monitoring of FACTS-
Equipment in Electrical Power Systems
Using the TMS320C50 DSP
Abstract
Flexible AC Transmission Systems (FACTS) are thyristor based
means for highly dynamic load flow control in electrical power
supply and distribution. These new appliances have an impact on
network parameters like transmission angle, node voltage, line
current and harmonics. Thus the control of FACTS equipment
provides a highly dynamic view of these parameters. For this
purpose we developed the digital prototype of a Network Online
Monitoring System (NOMS) which is based on a multi-signal
processing architecture to monitor the influence of FACTS-
equipment on the power system. It includes the recording and
analogouse processing of test input signals, A/D and D/A
conversion and various methods of digital signal processing such
as complex digital filtering, space phasor blocking and discrete
Fourier transformation. Real-time signal processing requires high
calculation power that is provided by the parallel processing
architecture of TMS320C50 with a flexible global and local
memory management, high-speed bus arbitration and a smart
PC/AT-interface for long-term investigations and controls. The
software algorithms are specified, for power systems and
comprise several levels of processing priorities optimizing the
available calculating time. A prototype of a NOMS has been
successfully tested in a Transient Network Analyzer (TNA) of
power supply and distribution systems at our University.
This document was an entry in the 1995 DSP Solutions
Challenge, an annual contest organized by TI to encourage
students from around the world to find innovative ways to use
DSPs. For more information on the TI DSP Solutions Challenge,
see TIs World Wide Web site at www.ti.com. SPRA313
8
Implementing a Multi Signal Processing System for High Speed Monitoring of
FACTS-Equipment in Electrical Power Systems Using the TMS320C50 DSP
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