DIAGNOSTICS OF INSULATING SYSTEM OF ELECTRICAL MACHINES
Main researcher
: FIRINGER, VLADIMIR (12014) Assistants
ČABRAJAC, SONJA (7516)
MILETIĆ, BORIS (31370)
POLAK, JOSIP (68325)
Type of research: applied Duration from: 01/01/91. to 12/31/94. Papers on project (total): 23
Papers on project quoted in Current Contents: 1
Institution name: Končar, Institut za elektrotehniku, Zagreb (8) Department/Institute: Department for insulation, technology and measurements Address: 41000 Zagreb, Baštijanova b.b. City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1/336666
Summary: In the eighties much attention has been paid to monitoring
and diagnostics of electrical machines. Standard methods used so far have
been expanded with up-to-date, comprehensive and efficient ones in order to
increase the reliability and efficiently of the machine, reduce the
influence of human factor in large and complex power systems, and extend
the machine life. The importance of insulating system, its complexity and
interaction with other machine parts have conditioned the development of a
special branch of diagnostics based on the state of insulating system and
its components. Through synthesis of our own and foreign finding we have
performed theoretical and experimental investigations in order to find the
diagnostic methods based on tests of insulating systems of electrical
machines and transformers. The investigations comprise factors that
influence the diagnostics of insulating systems of electrical machines such
as insulating system materials, construction and technology, the stress of
the system as regards the operating and environmental conditions, state and
degraration with aging and stress, diagnostic tests and classification of
test results and making the diagnoses by type of duty and machine. On this
basis, the goals were set: to enable monitoring and detection of the state
of insulating system using diagnostic methods, to determine the mechanisms
and level of degradation, to determine the possible, spent, and remaining
life, to detect preventively weak spots and damages before occurrence of
failure, to determine the type, level and location of failure and to
prevent it and repair.
Research goals: The results of investigations enable saving and more
reliable operation of power equipment through application of diagnostics.
Through preventive diagnostics, that enables timely diagnosis of the state
of the insulating system or the machine, it is possible to correct the
operating conditions, and thus to avoid failures. Prognostics by means of
determination of the remaining or spent life enables timely replacement,
revitalisation or overhaul of the machine, with the possibility of choosing
the most favourable time, place and scope of works after preparation have
been done. The diagnostics of weak spots and failures shows the level, kind
and location of damage or failure, and often their causes as well if
statistic method are used. The results of diagnostic investigations improve
the quality and reliability of machines and sometimes of the entire power
system, and provide considerable material and time savings because they
prevent unexpected drop-outs of power sources and damages to machines.
COOPERATION - INSTITUTIONS
Name of institution
: Elektrotehnički fakultet Type of institution: University/Faculty Type of cooperation: Joint project City: 10000 - Zagreb, Croatia Other information about the project.