PV-battery Hybrid System Research Articles

A comprehensive techno-economic and power quality analysis of a remote PV-diesel system in Australia

Presently, the world is considering the integration of small, medium and large-scale PV systems into both urban and remote rural electricity networks. This sees a transition towards a 100% renewable energy based electricity supply from the current conventional fossil fuel based electricity supply. Australia has a significant electricity generation potential from solar PV resources which also encourages the uptake of PV-battery hybrid systems. Australian utilities operating in the isolated and remote areas are now seriously considering the integration of solar PV systems as a long-term solution to reduce costs and facilitate sustainable electricity generation. This would also defer expensive grid extension to supply electricity to these dispersed remote communities. This study aims to model and optimise a remote Australian PV-diesel system incorporated with high levels of PV penetration and battery storage and investigate the system power quality issues. The study includes system component optimisation and techno-economic analysis which considers the outcomes regarding the cost of energy (AUD$/kWh), fuel savings potential and environmental impacts. Power quality issues have been explored by analysing the response of fast frequency-responsive (FFR) battery storage. The overall study has found that higher levels of PV penetration integrated with the current diesel operated system provides a comprehensive and efficient electricity supply and FFR Li-ion batteries can mitigate transient power quality issues and maintain system frequency within acceptable limits.

태양광-배터리 하이브리드 전원시스템의 에너지 효율개선을 위한 규칙기반 협조제어 원리

This paper presents effective design schemes for a photovoltaic (PV) and battery hybrid system that includes state-of-the-art technologies such as maximum power point tracking scheme for PV arrays, an effective charging/discharging circuit for batteries, and grid-interfacing power inverters. Compared to commonly-used PV systems, the proposed configuration has more flexibility and autonomy in controlling individual components of the PV-battery hybrid system. This paper also proposes an intelligent coordination scheme for the components of the PV-battery hybrid system to improve the efficiency of renewable energy resources and peak-load management. The proposed algorithm is based on a rule-based expert system that has excellent capability to optimize multi-objective functions. The proposed configuration and algorithms are investigated via switching-level simulation studies of the PV-battery hybrid system.

Design and Analysis of a CHB Converter Based PV-Battery Hybrid System for Better Electromagnetic Compatibility

This paper proposes a photovoltaic (PV)-battery hybrid system based on the cascaded H-bridge (CHB) inverter, which not only makes the irregular PV power smoother but also limits the grid current under grid voltage dips. Different from the conventional configuration where the PV and the battery inverters are paralleled on the grid side, the proposed CHB based hybrid system connects the AC sides of the PV inverter and the battery inverter in cascade. Thus, the multilevel inverter output voltage is available. Compared to the conventional configuration, the proposed system offers the improved electromagnetic compatibility (EMC) and better harmonic performance. The computer simulation has been given to verify the validity of the proposed system and control strategy.