Design and Implementation of Hybrid Controller for Dynamic Power Management in a DC Microgrid

Abstract

Nowadays more and more devices and appliances are operated with electricity, thus the electrical crisis is increasing exponentially day by day. In order to avoid the occurrence of electricity crisis, various power generation resources are used at the utility side to enhance the power generation to meet the consumers' demand for electricity. Hence, a suitable control scheme has to be implemented at the microgrid to reduce the electrical fluctuation, power loss and manage the power quality. The Adaptive Proportional Integral Voltage Controller (APIVC) and hysteresis current controller (HCC) are integrated to enhance the quality of power generated. The electrical fluctuation is reduced by the proposed efficient hybrid parallel source controller model for DC Microgrid. The proposed model exerts decentralized control, which is an advanced droop control where communication is not required. The outer voltage control loop and inner current control loop provide faster control to maintain the grid voltage constant. The grid voltage is set as the reference value and the actual value is sensed to generate error value, which sets the reference value of current. The error signal is processed to provide switching signals for the converters. The performance analysis and simulation results show that the proposed mechanism performed better than the conventional methods such as Hysteresis Band Current Controller (HBCC) with Pulse Width Modulation (PWM) and Proportional Integral Voltage Controller (PIVC) with Hysteresis Current Controller (HCC), in terms of the electrical fluctuation, power loss and manage the power quality in the microgrid.

Design of Pulse Forming Networks Triggered by High-Power Hydrogen Thyratron

“…By means of Series resonance network, the order and parameter in Pulse Forming Network can be determined. But the value of inductance and the other components value in Pulse Forming Network which used hydrogen thyratron designed by Series resonance network are so large that it increases the difficulty of manufacturing and cannot be widely used in engineering practice [1][2][3][4][5]. World field scholars have conducted a lot of research on PFN design, for instance, Harchandani and Gorade [6] studied the PFN of Marx generator with boosting operation; scholar Zhu [7] of Xiꞌan Jiaotong University optimized the design of compact-style PFN; Ma and Li [8] of China Academy of Engineering Physics designed a charging source for PFN formed by cascaded Blumlein pulse; Long and Liu [9] of the National University of Defense Science and Technology of China researched the Marx PFN; Chang [10] of China Academy of Engineering Physics developed a 100 KV low-impedance Blumlein PFN with non-uniformly distributed parameters [11,12].…”