Hybrid DC Power System for Pulse Load Application: Design, Modeling and Operation

Abstract

In this work, the design of a hybrid DC power system for pulse load applications is considered. In microgrid power systems, pulse loads are particularly problematic since the load short-time power demands are very high and the total system inertia is finite. The requirements of the system in terms of power and energy were described. Also, the design aspects of the two commonly used configurations of the hybrid energy storage system, passive hybrid and active hybrid, are explained in detail. A 320-V laboratory scale hybrid DC microgrid incorporating different types of loads is developed for this study. This microgrid is controlled through a three level control and energy management system. A detailed model of the hybrid dc microgrid including different energy storage systems for transient and dynamic study is presented. The microgrid is experimentally tested and its performances are compared with the simulation model under normal and transient fault conditions. The results successfully validate both the experimental design of the system and the accuracy of the grid simulation model. Keywords-hybrid DC microgrid; energy storage; power system modeling; supercapacitor I.978-1-4799-8884-6/15 $31.00

Review of Active and Reactive Power Sharing Strategies in Hierarchical Controlled Microgrids

“…The methods for active and reactive power sharing in microgrids with linear load are well developed, but it is still difficult to ensure the reactive power sharing when microgrids supply complex loads such as dynamic loads, induction motor, the pulsed loads and the electric vehicles, etc. The realization of the reactive power sharing in such variable loads is one of the important directions in the future research [157][158][159][160].…”

“…The microgrid with sensitive loads discussed in [158], and a new method to supply energy for the loads by using the fuel cell as energy storage equipment is proposed. A hybrid DC power system is designed in order to supply a pulsed load [159]. Moreover, a plug and play method is presented in [160] when the microgrid supplies the sensitive and unbalanced loads, which enhances the power quality.…”

“…Microgrids can be better utilized when the problems of load active and reactive power sharing are effectively solved. The future trends on MG research and application can be summarized as follows [155][156][157][158][159][160][161][162][163][164][165][166][167][168][169].…”

Comparative Analysis of a DC-microgrid Incorporating Hybrid Battery/Supercapacitor Storage System Addressing Pulse Load

“…The most common type of discontinuous load is pulse power load (PPL), which is defined as a high-power load (from kW to MW) integrated into the power system quickly (a couple of seconds) with repeated pulses [2], [3]. The PPL is used in many applications, such as medical applications, military applications like electromagnetic guns, laser beam weapons, shipboard loads, electromagnetic launch systems, high electric pulse for food production, radar applications, particle accelerators, and a collection of electric vehicles during their charging time through a very short time [4,5]; however, it has various and more complex effects on the power systems compared to the traditional disturbance load. As a result of using PPL, a lot of challenges and issues can face the modern electrical power system, such as dynamic overvoltage, voltage sag, the cut-off among the generation and load, frequency fluctuation in the joint power system, high reactive power flow, interruption of other devices, and failure of the control system [6], [7].…”

Research on low input current ripple two‐stage converter for low frequency pulsed‐power applications

“…With the development of modern industry, the applications of pulsed power loads such as the electric propulsion systems and the synthetic aperture radar systems are growing rapidly. Meanwhile, the development of pulsed power load presents more diversified [1–3].…”