Krischonme Bhumkittipich

Distributed STATCOM for controlling Output voltage of wind turbine generator

This paper describes analysis and control design of a distribution level static synchronous compensator (DSTATCOM) to control the voltage at the PCC in order to keep the power constant at the load from intermittent wind speeds. For fast response requirement, a feedforward compensation scheme is derived and employed in the paper. Firstly, the mathematical model of the DSTATCOM is derived. Then the compensation principle is described with applying RDFT in order to immune any undesired signals. Accordingly, a hardware prototype is built with a fix-point DSP TMS320F2812-based system. Use of a current-controlled PWM inverter as the power stage of the DSTATCOM generates needed compensation currents for real-time load compensation. Finally, experimental results confirm the performance of the proposed DSTATCOM.

Model and experiment for study and analysis of Photovoltaic lightning effects

This paper will present the proposed model and experiment of effects from lightning impulse on photovoltaic. The study will show results of effect from lightning impulse indirect striking on Photovoltaic. As the increasing of photovoltaic applications worldwide, there are varieties of photovoltaic applications around the world have been installed. From the records and reports of photovoltaic applications, there are many serious cases that photovoltaic applications were damaged by thunder lightning strikes on photovoltaic module or its components. When lightning impulse strikes to the area of PV system, the effects cause a failure of PV system therefore it is really necessary to study this problem in order to find the appropriated method to protect the PV system. The paper proposes a simulation model to study phenomena and characteristic from lightning impulse on PV system by Matlab/Simulink. The PV experimental platform is also constructed for the implementation in the High volt laboratory of Rajamangala University of Technology Thunyaburi (RMUTT). The experimental platform is tested by lightning impulse generated from 100 – 800 kV. The results from the laboratory will be investigated comparing to the simulation results. Moreover the method of protecting PV system from the Lighting Impulse will be introduced

Comparison between mechanical circuit breaker and solid state circuit breaker under abnormal conditions for low voltage systems

This paper presents the comparison between mechanical circuit breaker and solid state circuit breaker under abnormal conditions for low voltage systems. According to the mechanical circuit breaker, the operation was limited on the fault types, detection method and operation error. The solid state circuit breaker is proposed to protect those events using Thyristor as switching device and detection controller in single phase power system. The design shows the operation scheme under 220V, 30A rating by using in low voltage system for supporting the smart home in the future. The simulation result showed that the comparison between mechanical circuit breaker and solid state circuit breaker under abnormal conditions. The paper can verify that this study can be designed the method of novel solid state circuit breaker for future applications.