Protection Techniques in Electrical Energy Systems

Helmut Ungrad (Author) , Willibald Winkler (Author) , Andrzej Wiszniewski (Author)

Fundementals of protection engineering: the principal faults on electrical power systems and system components; the main criteria for detecting faults; instrument transformers for protection purposes. Analogue protection: solid state protection relays and systems; application of analogue protection devices; analogue protection for power systems; analogue protection for machines. Digital protection: computer-based protection and control; A/D conversion of input variables; digital signal conditioning; algorithms for digital protection; logical structures for digital protection. Appendices: symbols; characteristics of standard low-pass filters.