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This paper proposes a partial discharge analysis in cylindrical insulators model for finding electrical parameters. There are three types of electric insulator, namely liquid, solid and gas insulator. The capacitance, dielectric loss factor (tandelta) are found by measuring PD pattern of each insulator. The power dielectric loss (Pd) of each electric insulator also calculates by using the result of...
This paper proposes a partial discharge analysis in cylindrical insulators model for finding electrical parameters. There are three types of electric insulator, namely liquid, solid and gas insulator. The capacitance, dielectric loss factor (tandelta) are found by measuring PD Pattern of each insulator. The power dielectric loss (Pd) of each electric insulator also calculates by using the result of...
This paper presents the analysis and the control of shunt-compensator for improving unbalanced voltages of power distribution systems in Thailand. The shunt-compensator is connected to the low voltage level in power distribution system. The analysis detail and the design of shunt-compensator obtain by using the voltage vector control (mathematical model with the stationary reference frame and synchronous...
This paper presents a partial discharge (PD) measurement for cable terminators of XLPE power cable. The power cable of rated voltage 24 kV and a cross sectional area of 240 mm2 was used in the experiment. The partial discharge level and dielectric loss are very important factors to indicate the insulation quality of power cable. Therefore, measurement techniques of partial discharge and dielectric...
This paper presents detailed analysis of load voltage compensation for dynamic voltage restorer (DVR) that used for enhancing power quality. DVR is a custom power device used to correct voltage sag by injecting voltage as well as power into power distribution system. A method of determining the exact amount of voltage injection required to correct a specific voltage reduction with minimum power injection...
Nowadays, a high voltage with high frequency Tesla transformer is used for testing a 115 kV line post insulator. This paper presents the design, and construction of a low-cost high performance Tesla transformer for line post insulator testing. The output of the transformer has a rate of 500 kV. The output wave shape is controlled based on the resonance circuit. The simulation and experimental results...
This paper presents control algorithm for dynamic voltage restorer (DVR) to improve voltage quality problems such as voltage sags/swells in distribution systems. When voltage sags/swells occur, possibly, due to faults and some load switching, DVR has to detect the problem and inject appropriate voltage component as soon as possible. The paper proposes a dynamic control based on feedforward and feedback...
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