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Darbe apžvelgti elektros įrenginių gedimų įvertinimui taikomi ištirpusių dujų analizės (IDA) metodai bei papildomi rodikliai, nusakantys elektros įrenginių būklę. Remiantis tradiciniais IDA metodais įvertintos galios transformatorių galimo gedimo prognozavimo galimybės, IDA metodų efektyvumas. Nustatyta, jog elektros įrenginių gedimų analizė yra efektyvesnė ir tikslesnė naudojant keletą IDA metodų kompleksiškai arba intelektinius metodus., In the present study, dissolved gas analysis (DGA) methods used to evaluate faults in electrical equipment, and additional factors that characterize the condition of electrical equipment have been reviewed. Using the traditional DGA methods, possibilities for the prognosis of possible faults in a power transformer and the effectiveness of DGA methods have been evaluated. Electrical equipment fault analysis appeared to be more effective and more precise when applying several DGA methods in complex or using intellectual methods.

Aim of the work 1. To analyze the methods used for the quality and resource assessment of complex insulation; 2. To develop the models for the assessment and analysis of polarization features, dielectric parameters and moisture content in oil- paper insulation; 3. To develop the method for the assessment of moisture quantity by measuring the polarization characteristics; 4. To analyze the impact of water quantity on dielectric parameters of transformer insulation; 5. To classify the quality criteria of oil-paper insulation; 6. To identify the tendencies in variation of insulation’s dielectric parameters and moisture quantity; 7. To implement the developed models and methods in the electricity industry of Lithuania for the assessment of the transformers’ insulation quality and resource.

Purpose of this work is to propose and study new ways of automatic generation control (AGC) and ways for accounting of this service; formulate key methodology principles of payment for system services; estimate costs of automatic generation control.