An approach for micro grid management with hybrid energy storage system using batteries and ultra capacitors

Abstract

This paper present a new architecture for a micro grid management system with batteries and ultra-capacitors (UC). The proposed architecture uses DC side cascaded PI for controlling individual hybrid energy storage system (HESS) components such as battery and UC for maintaining power balance and managing PV intermittency. The inverter control is independent of the DC side PI configuration and thus can provide easy integration to any vender specific inverters. The main advantage of the proposed architecture is that it provides independent controllability and decouples the AC side inverter thus improving flexibility. The proposed architecture is tested on a dynamic simulation platform which shows that the method can mitigate 90% of PV intermittencies.

A Review on the Selected Applications of Battery-Supercapacitor Hybrid Energy Storage Systems for Microgrids

“…Therefore, this configuration provides flexible controllability of both BESS and SCSS. In [38], a new architecture using DC side cascaded PI controllers for individual HESS is proposed. This architecture decouples the controllability of the DC and AC components, maintaining load-generation intermittency and further providing the flexibility of integration to any vendor-specific inverter integration.…”

Review of residential PV-storage architectures

“…1) according to the ability to deliver power, time response or energy capacity. Based on that, supercapacitors can provide high response times (seconds) with high power output, but they have a low energy density [20]. Hydrogen storage systems are generally composed by an electrolyzer, tanks and a fuel cell; being able to store considerable amount of energy with low power ratings.…”

“…The equivalent circuit of integration of PV module battery and the supercapacitor is reported in [20]. The battery and supercapacitor fulfil the task to keep the dc bus (dc coupled) output voltage fixed and to perform real time load following, the extra power available on the dc bus is stored in the supercapacitor, and released when the power from the sources is reduced [27].…”

“…In [57] the main goal was to keep a constant power output to improve the quality of energy output. Control strategies for fuel cells were shown in [58], also control strategies for set-ups that include a supercapacitor and a battery [20]. In [59], the operation and control methods are reported for a flywheel architecture.…”

Design and Performance Analysis of Hybrid Battery and Ultracapacitor Energy Storage System for Electrical Vehicle Active Power Management

“…Charging, discharging, voltage level, and other basic features of the hybrid source (ultracapacitor and battery) are not equal, and a suitable interface is necessary. Because a bidirectional DC-DC converter can meet the requirements for high utilization efficiencies, a real-time EV energy storage management strategy (known as HESS) is required for a better and more effective allocation of power demand for the vehicular system between energy storage devices [1,6]. Active power management always uses a single control variable and a single control state (source state-of-charge, source power level).…”