Voltage Quality in Electrical Power Systems

✍ Scribed by Professor J. Schlabbach, Dr. D. Blume

• Publisher: The Institution of Engineering and Technology
• Year: 2001
• Tongue: German
• Leaves: 253
• Series: IEE Power & Energy Series, 36
• Edition: 1st
• Category: Library

✦ Synopsis

El libro trata profundamente el tema de las perturbaciones relacionadas con la calidad de tensión, armónicos e interarmónicos, fluctuaciones de tensión entre otros, es libro teórico práctico porque a cada tema en particular existe un ejemplo de aplicación a la vez estándariza cada perturbación analizada. Recomiendo el libro a todos los amantes de la investigación de perturbaciones eléctricas

✦ Table of Contents

Contents......Page 6
Foreword......Page 10
1.1 Electromagnetic compatibility in electrical supply systems......Page 12
1.2 Classification of system perturbations......Page 15
1.3 EU directives, VDE specifications and standards......Page 17
1.4.1 Complex calculations, vectors and phasor diagrams......Page 21
1.4.2 Fourier analysis and synthesis......Page 23
1.4.3 Symmetrical components......Page 28
1.4.4 Power considerations......Page 32
1.4.5 Series and parallel resonant circuits......Page 34
1.5.1 Voltage levels and impedances......Page 38
1.5.2 Features of the voltage in power systems......Page 40
1.5.3 Impedances of equipment......Page 42
1.5.4 Characteristics of typical equipment......Page 47
1.6.1 Graphical determination of symmetrical components......Page 50
1.6.3 Calculation of equipment......Page 52
1.7 References......Page 54
2.1.2 Occurrence due to network equipment......Page 56
2.1.3.1 Basic principles......Page 59
2.1.3.2 Full-wave rectifier with capacitor smoothing......Page 60
2.1.3.3 Three-phase bridge circuit......Page 62
2.1.3.4 Converters......Page 68
2.1.4 Occurrence due to random consumer behaviours......Page 71
2.1.5 Telecontrol signals......Page 73
2.2.1 Characteristics and parameters......Page 75
2.3.1 Calculation of networks and equipment......Page 77
2.3.2 Modelling of equipment......Page 78
2.3.3 Resonances in electrical networks......Page 79
2.4.1 General......Page 83
2.4.2 High-energy equipment......Page 84
2.4.3 Network operation......Page 87
2.4.5 Protection, measuring and automation equipment......Page 88
2.4.6 Loads and consumers......Page 89
2.4.7 Assessment of harmonics......Page 92
2.5.1 General......Page 95
2.5.2 Emitted interference......Page 96
2.5.3 Compatibility levels......Page 98
2.6.1 Harmonic resonance due to reactive power compensation......Page 101
2.6.2 Assessment of a harmonic generator......Page 104
2.6.3 Impedance calculation in a medium voltage network......Page 106
2.6.4 Typical harmonic spectra of low voltage consumers......Page 108
2.7 References......Page 111
3.1 Definitions......Page 114
3.2.1 Voltage fluctuations......Page 115
3.3.1 General......Page 116
3.3.2 Calculation of the voltage drop in general form......Page 117
3.3.3 Ast/Pst calculation......Page 121
3.4.1 Mathematical description of the flicker algorithm......Page 122
3.4.2 The Pst disturbance assessment method......Page 125
3.5 Effects of voltage fluctuations......Page 126
3.6 Standardisation......Page 127
3.7.1 Measurement of flicker in a low voltage system......Page 129
3.7.2 Calculation of an industrial system for resistance heating......Page 130
3.8 References......Page 133
4.2.1 Simplified examination......Page 134
4.2.2 Symmetrical components......Page 135
4.5.1 Measurement of unbalance in an industrial 20 kVsystem......Page 136
4.5.2 Determining the unbalance of an industrial system......Page 137
4.6 Reference......Page 138
5.1 General......Page 140
5.2.2 Basic structure of a digital measuring instrument......Page 141
5.2.3 Transient recorders......Page 143
5.2.4 Harmonics analysers......Page 145
5.2.5 Flicker meter......Page 146
5.3.1 Statistical methods......Page 148
5.3.2 Measuring and evaluation methods......Page 152
5.4.1 Algorithms and evaluation......Page 154
5.4.2 Instrument and isolating transformers, current clamp......Page 155
5.5.2 Medium and high voltage systems......Page 158
5.7 Characteristics of measuring instruments......Page 161
5.8 Performance of measurements......Page 163
5.9 References......Page 164
6.2 Reduction of the emitted interference from consumers......Page 166
6.3.1 Filter circuits......Page 169
6.3.3 Symmetrical connections......Page 174
6.3.4 Active filters......Page 175
6.3.4.1 High-performance batteries......Page 178
6.3.4.2 Superconductive magnetic energy storage......Page 179
6.3.4.3 Gyrating mass flywheel......Page 181
6.4.1 Measures during network planning: system strengthening measures......Page 183
6.4.2 Measures with regard to system operation: short-circuit current limitation......Page 185
6.5 Cost analysis......Page 189
6.6.1 Designing the UPCS......Page 190
6.6.1.1 Design of the UPCS to compensate for harmonics......Page 191
6.6.1.2 Design of the UPCS with regard to voltagesags and flicker......Page 197
6.6.2 Example of network planning, taking account of active system filters......Page 204
6.6.2.1 System connection variants of a large industrial customer......Page 206
6.6.2.2 Optimisation of the location of active filters......Page 214
6.7 References......Page 215
7.1 Survey of voltage quality (harmonics) in medium voltage networks......Page 218
7.2 Connection of harmonics generators, high-load consumers......Page 220
7.3.1 Measurements in a 35 kV ring-cable network......Page 227
7.4.1 Disturbance analysis harmonics in power station service network I......Page 229
7.4.2 Disturbance analysis (voltage increase) in powerstation service network II......Page 232
7.4.3 Network resonance in the low voltage network......Page 235
7.4.4 Reactive power compensation in a 500 V network......Page 238
7.5 References......Page 242
8.1.1 Formula symbols......Page 244
8.1.2 Indices, subscript......Page 246
8.1.3 Indices, superscript......Page 247
Index......Page 250

✦ Subjects

Приборостроение;Силовая электроника;