Annual Report 2011-2012

Annual Research Report 2011-2012
Project Title:
Technical advice and installation of partial discharge
measuring Equipment in Neka power plant
Department: Electrical machines
Employer: Neka electrical power Generation Company
Project staff: S. Amini Valashani, R. Sarafraz, S. Gouran, M.Arghavan
Project Summary:
Project manager :A. Farshidnia
Project code: PEMNN02
It is clear that implementation of maintenance systems that are based on monitoring
devices, reduces the costs of maintenance and increase the reliability and system
efficiency. On line monitoring of partial discharge in rotating electric machines is
helpful to diagnosis of insulation without shutting down the systems. Industrial units are
70% depends on the rotating electric machines so this point is so important. Neka power
plant with four 440 MW steam units for each unit is one of the most important and large
power plants in the country. According to passing the 25 years of the operation of this
power plant the necessity of estimating the quality of the insulation of generators and
motors of Neka power plant was inevitable. So by installing the capacitive couplers on
generator on steam unit number one on 1379 and other three generator units and 9
motor devices on 1382 partial discharge monitoring system was installed on power
plant.
By confirmation of these measuring systems this contract was generalized to 28 high
voltage motor devices also 2 generator units. Also continues partial discharge
measuring device was installed on 4 steam generators and their data transferred to the
control rooM.Data analyzing in more than 3 years leads to gathering a good data bank
that this research group could have ability to analyzing the partial discharge data or
recognize the fault operation of insulation of units. By this performance one version of
data bank software in (Net) was prepared in electric machine research group and
delivered to the employer.
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