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The performance of magnetic field-induced dielectric barrier discharge (DBD) as an ozone generator has been investigated. The effects of permanent magnet induced DBD position has also been varied using three approach models. Model 1 was by placing the ring permanent magnet under the ground electrode tied with Teflon, model 2 was by placing 2 (two) permanent magnet rings above the high voltage electrode and below the ground electrode, respectively which was limited by a Teflon solid material and the magnetic conditions were repelling each other, model 3 was by using 2 (two) pieces of ring permanent magnet placed above the high voltage electrode and below the ground electrode which was bounded by Teflon materials and these magnetic conditions were attracting each other. When the fly-back transformer terminal was connected to the high voltage and ground electrodes for model 1, the maximum measured voltages and discharge currents for model 1,2, and 3 were 13.8 kV and 690 mA, 12.5 kV and 973 mA, 11 kV and 800 mA, respectively. The ozone generator produced ozone gas at 110 ppm, 162 ppm, 207 ppm for model 1,2, and 3, respectively. Furthermore, the addition of permanent magnet beans as electrodes increased energy to produce plasma in the gap between the high voltage electrode and dielectric ceramic. It was shown that the permanent magnet beans enhanced the development of plasma in the gap. The effect of induction of ring permanent magnet with attractive conditions is new thing to improve the performance of ozone generators. [ABSTRACT FROM AUTHOR]

The article focuses on the issues of Load Frequency Control (LFC) under non-linear strategies in multi source multi area hydro thermal system. On practical perspective dead band, boiler dynamics, reheat steam turbine along with hydro turbine operating under two different area capacities are considered in the system. When subjected to random load variations in both the areas, the system exhibits higher oscillations. The speed governor matches the generation with the demand. The offset in the area frequencies and tie-line power is removed by using secondary Proportional Integral (PI) controller. The PI controller is tuned using Ziegler Nichols' (ZN) and Fuzzy Gain Scheduling (FGS) method. The influence of high Proportional (P) controller gain during steady state and high Integral (I) controller gain during transient affects the system performance. Variable Structure System (VSS) helps to switch from P to PI controller during transient to steady state based on control error. The concept of VSS is applied to Fuzzy Gain Scheduling (FGS) PI controller. The performance of the optimal Variable Structure Fuzzy Gain Scheduled (VSFGS) controller under non-linear environment is judged and validated using performance indices. [ABSTRACT FROM AUTHOR]

The objective of optimal feeder reconfiguration of radial distribution system problem is to obtain the best set of branches to be opened, one each from each loop, such that the resulting radial distribution system has the desired performance. This paper presents a feeder reconfiguration problem in the presence of distributed generators to minimize the system power loss while satisfying operating constraints using Hyper Cube-Ant Colony Optimization (HC-ACO) algorithm. Loss Sensitivity analysis is used to identify optimal location for installation of DG units. Simulations are conducted on 33 - bus radial distribution system at four different cases to verify the efficacy of the proposed method with other recent published approaches reported in the literature. The result shows that the method proposed is fast and effective. [ABSTRACT FROM AUTHOR]