Dr. Naresh Kumar Challagondla

Dealing with technical issues of Gas-insulated high-voltage switchgear (GIS) and it's components ; Preparation and implementation of Factory acceptance tests (FAT) ; Creating technical documents like work instructions related to GIS production in Berlin.

Topic: Design of test lab to test the polluted insulators under HVDC ; Responsibilities: Measurements of the DC test lab required for the pollution tests ; Describing the test and measuring equipment necessary for the designed lab ; Finding the test procedure according to IEC standards to test the polluted insulators under HVDC ; Explaining the types of pollutants accumulate on the insulators ; Research on the specimens required for the pollution tests.

Study of Siemens high voltage disconnectors and earthing switches ; Describing the resistance values of the current paths of all disconnectors ; Finding the rotating contact angle of all existing Siemens earthing switches.

Design of the insulators in 3D; Electric field simulations using FEM software ANSYS and COMSOL ; Finding the behavior of water drops on the insulator surfaces; Studying the electric field distribution on parallel insulators under DC .

specialization: High Voltage Measuring and Testing Technique ; High Voltage Engineering and Insulation Materials ; Power Electronic Applications in High Voltage Grids and Drive Systems ; Power Automation.