M. A. Hannan

Modeling and power quality analysis of STATCOM using phasor dynamics

This paper deals with the modeling of synchronous static compensator (STATCOM) of a power system based on dynamic phasor model to investigate the performance of STATCOM for power quality analysis and compared with EMTP like simulation. The dynamic phasor model and EMT model of the STATCOM including the system is implemented in Matlab/Simulink toolbox and PSCAD/EMTDC, respectively. Details dynamic phasor model of STATCOM switching function and its control system has been presented. A credible solution to the power quality problems on the distribution network has been analyzed using dynamic phasor model and EMTP like PSCAD/EMTDC simulation techniques. The simulation results demonstrated that the dynamic phasor model of STATCOM including the system makes an excellent agreement with the detailed time-domain EMT model of PSCAD/EMTDC simulation. It is found that the dynamic behavior of STATCOM phasor model have very good potential application in analyzing power quality issues, faster in speed and higher accuracy as compared with PSCAD/EMTDC simulation.

RFID Communication Using Software Defined Radio Technique

Radio Frequency Identification (RFID) is currently the hottest technology in wireless applications area. Its unique advantages such as data transmission with extreme low power or even without power in tag can be the biggest beneficial for goods management. Software Defined Radio (SDR) is a wireless communications system where all of the signal processing is implemented in software. By simply downloading a new program, a software radio is able to interoperate with different wireless protocols, incorporate new services, and upgrade to new standards. In this paper, we build an RFID application simulation environment over the SDR. We do the source to sink transmission simulation by using Quadrature Amplitude Modulation, Then, we compare the differences of BER versus SNR performances for input and output signals.

Zarządzanie rozproszonymi generatorami w mikrocieci z wykorzystaniem sterowników o logice rozmytej

A power distribution system with distributed generations can operate as a microgrid under specific conditions. A microgrid can be operated under grid-connected and islanded modes seamlessly without disrupting the loads within the microgrid. This study analyzes the intelligent control of a microgrid with a pulse-width modulation-controlled voltage source inverter. Switching patterns are generated through a fuzzy proportional-integral (PI) controller. This study aims to develop a fuzzy-PI controller and compare its performance with that of a PI controller in controlling the voltage and frequency of a microgrid under disturbances in a Matlab/Simulink environment. Results show that the fuzzy-PI controller has higher capability, precision, and robustness than the PI controller in quickly restoring and stabilizing the microgrid. A simulation experiment is also performed to verify the greater validity and effectiveness of the microgrid equipped with the fuzzy-PI controller than with the PI controller. The developed fuzzy-PI controller can reduce the total harmonic distortion by 0.46%. Streszczenie. W artykule analizowano inteligentne sterowanie mikrosieci z wykorzystaniem przekszta tnika sterowanego metod modulacji szeroko ci impulsu. Jako sterownik wykorzystano proporcjonalno ca kuj cy uk ad z logika rozmyt . Zbadano prac uk adu w sieci z zak óceniami. Stwierdzon znacz ce przewagi kontrolera pracuj cego z logika rozmyt w porównaniu do uk adów konwencjonalnvch. Zarz dzanie rozproszonymi generatorami w mikrocieci z wykorzystaniem sterowników o logice rozmytej