Download PDF Short circuit Currents Power and Energy Series 51 by J. Schlabbach

Sinopsis

Short-circuit currents are the dominating parameters for the design of equipment and installations, for the operation of power systems and for the analysis of outages and faults. Besides the knowledge about design of equipment in power systems, in auxiliary installations and about system operation constraints, the calculation of short-circuit currents is a central task for power system engineers. The book describes the individual equipment in power systems with respect of the parameters needed for short-circuit current calculation as well as methods for analysing the different types of short-circuits in power systems using the system of symmetrical components. Besides detailed explanation of the calculation methods for short-circuit currents and their thermal and electromagnetic effects on equipment and installations, short-time interference problems and measures for the limitation of short-circuit currents are explained. Detailed calculation procedures for the parameters and typical data of equipment are given in a separate chapter for easy reference. All aspects of the book are explained with examples based on engineering studies carried out by the author.

Content

1. Introduction
2. Theoretical background
3. Calculation of impedance of electrical equipment
4. Calculation of short-circuit current in a.c. three-phase HV-systems
5. Influence of neutral earthing on single-phase short-circuit currents
6. Calculation of short-circuit currents in low-voltage systems
7. Double earth-fault and short-circuit currents through earth
8. Factors for the calculation of short-circuit currents
9. Calculation of short-circuit currents in d.c. auxiliary installations
10. Effects of short-circuit currents
11. Limitation of short-circuit currents
12. Special problems related to short-circuit currents
13. Data of equipment

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