Development of a wavelet-based algorithm to detect and determine ...

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4.3. FILES FOR DATA EXCHANGE 25 ft where: ft= ASCII Example configuration file The following example shows a configuration file from a digital protection device. The first line contains the station name (UAB_110kV_PN 7S513_1294). The second line contains the number of channels, in this example there are 8 analog channels and 1 digital channel. The next few lines are explaining each analog and the digital channel (see former section for detailed information) The last lines contain information about the power frequency (50 Hz), number of sampling frequencies (1), sample rate (999,000999), number of samples (240), time and type of data file (BINARY). UAB_110kV_PN 7SA513_1294„1997 9,8A,1D 1,IL1„1,I/In,4.3234,-4.3859,0,-32767,32767,1,1,S 2,IL2„2,I/In,4.3636,8.7719,0,-32767,32767,1,1,S 3,IL3„3,I/In,4.3368,-8.7719,0,-32767,32767,1,1,S 4,IE„4,I/In,1.3385,-4.3859,0,-32767,32767,1,1,S 5,UL1„5,U/Un,2.5189,-1.0152,0,-32767,32767,1,1,S 6,UL2„6,U/Un,2.5235,-1.5228,0,-32767,32767,1,1,S 7,UL3„7,U/Un,2.5018,-1.5228,0,-32767,32767,1,1,S 8,Uen„8,U/Un,2.6335,-3.5532,0,-32767,32767,1,1,S 1,Bin 1„,0 50.0 1 999.000999,240 27/11/2001,14:44:00.006000 27/11/2001,14:44:00.006000 BINARY 1.0
4.4. DIFFERENCES BETWEEN THE 1991’S AND THE 1999’S STANDARD 26 4.3.3 Data file (xxx...xxx.DAT) The data file contains the value of each sample of each input channel. The number stored for a sample is usually the number produced by the device that samples the input waveform. The stored data may be either zero based, or it may have a zero offset. Zero-based data goes from a negative number to a positive number, e.g., -2000 to +2000. Zero-offset numbers are all positive with a positive number chosen to represent zero, e.g., 0 to 4000 with 2000 representing zero. Conversion factors specified in the configuration file define how to convert the data values to engineering units. In addition to data representing analog inputs, inputs that represent on/off signals are also frequently recorded. These are often referred to as digital inputs, digital channels, digital subchannels, event inputs, logic inputs, binary inputs, contact inputs or status inputs. In this standard, this type of input is referred to as a status input. The state of a status input is represented by a number "1" or "0" in the data file. 4.4 Differences between the 1991’s and the 1999’s standard In 1999 was a revision of this COMTRADE Standard. Their are a few differences between the 1991’s and the 1999’s standard, which are listed below. 1. The Header (.HDR) file is explicitly defined as optional. 2. The Configuration (.CFG) file has been modified. A field containing the COM- TRADE standard revision year has been added to distinguish files made under this or future revisions of the standard. If this field is not present, the data is assumed to comply with the COMTRADE standard C37.111-1991 [3]. A field for a Time Stamp Multiplication Factor has been added to meet the need for long duration files. To assist in conversion of the data, three new scaling fields (primary, secondary, and primary-secondary) are added, defining the instrument
Page 1 and 2: Development of a wavelet-based algo
Page 3 and 4: Eidesstattliche Versicherung Ich ve
Page 5 and 6: 2.5.2 Software modules . . . . . .
Page 8 and 9: Chapter 1 Introduction Electrical p
Page 10 and 11: Chapter 2 Power Quality Recorder Si
Page 12 and 13: 2.2. FUNCTIONS 5 2.2.2 Power data r
Page 14 and 15: 2.3. INTERFACES 7 The binary inputs
Page 16 and 17: 2.4. OPERATION MODES 9 cessed. Figu
Page 18 and 19: 2.5. SOFTWARE (OSCOP P) 11 2.5.2 So
Page 20 and 21: 2.5. SOFTWARE (OSCOP P) 13 Figure 2
Page 22 and 23: 3.1. SIMEAS R CONFIGURATION 15 •
Page 24 and 25: 3.2. LABORATORY USE 17 Then the SIM
Page 26 and 27: 4.2. SOURCES OF TRANSIENT DATA 19 c
Page 28 and 29: 4.3. FILES FOR DATA EXCHANGE 21 4.3
Page 30 and 31: 4.3. FILES FOR DATA EXCHANGE 23 p=
Page 34 and 35: 4.4. DIFFERENCES BETWEEN THE 1991
Page 36 and 37: Figure 5.1: Structure chart of the
Page 38 and 39: 5.1. DATA STRUCTURE OF DATA STORAGE
Page 40 and 41: Chapter 6 Wavelets 6.1 Introduction
Page 42 and 43: 6.2. BASIC IDEAS OF THE WAVELET TRA
Page 60 and 61: Chapter 7 Algorithm to determine ce
Page 62 and 63: 7.2. ANALYZATION OF THE DISTURBANCE
Page 68 and 69: 7.3. MATLAB IMPLEMENTATION 61 7.3.2
Page 70 and 71: Chapter 8 Conclusion and Look-Out T
Page 72 and 73: LIST OF FIGURES 65 6.8 Scale level
Page 74 and 75: Bibliography [1] Ronald W. Schafer

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