Comprehensive power management scheme for the intelligent operation of photovoltaic‐battery based hybrid microgrid system

Abstract

This study proposes a comprehensive power management scheme (CPMS) for the economical and smart operation of a photovoltaic (PV) battery based Hybrid Microgrid (HMG) system. The solar-PV, DC-loads and battery storage are interfaced to DC-bus of the HMG. The battery is integrated into the DC-bus using a bidirectional energy storage converter (BESC). The voltage and frequency of AC-bus are regulated by utility grid and bidirectional interlinking converter (BIC) during grid-connected and islanded modes of operation, respectively. The proposed CPMS obviates high-speed communication link between converters for maintaining the system stability during power disturbances. Therefore, the vulnerability to collapse due to communication link failure is eliminated, thereby enhancing system reliability. The operational performance of HMG is improved with the proposed CPMS by providing additional features (minimisation of operating cost of the HMG, enhancement in voltage regulation of the DC-bus etc.) using low-speed communication network. The proposed CPMS can also be extended to a larger HMG system by utilising the full bandwidth of the communication network. Further, the proposed CPMS enables HMG to seamlessly switch from grid-connected to islanded mode and vice-versa. Experimental results validating the efficacy of the proposed CPMS are presented.

On the modelling, analysis, and design of a suboptimal controller for a class of wind/PV/battery based DC microgrid

“…Therefore, the battery is responsible for power balancing among the DGs and loads. A DC/DC converter with bidirectional power flow capability is essential to allow power-sharing between the battery and the other DGs [5]. From the load point of view, a load with DC/DC converters, when tightly regulated can be viewed as a CPL.…”

“…Recently, the microgrids (MGs) concept has emerged due to the need for an electric power supply in remote and rural areas, data centres, and electric vehicles (EVs) [3]. MGs are small grids that generally incorporate several distributed generators (DGs) such as photovoltaic (PV) arrays and batteries, loads, and energy storage systems [4, 5]. MGs can operate in parallel with the main grid, and the loads are often fed through the local sources or the main grid [6].…”

Application of Solar Energy Technology in Green Healthcare Camps for Fighting COVID-19 Outbreak in Saudi Arabia

“…The supervisory and control system can utilize energy management software for optimal energy management operation, in which the supervisory system can communicate with the controllers of the distributed DC/DC converters, DC/AC inverters, remote switches, and accessible loads. Accordingly, it provides the optimal operation for the system devices [28]. Furthermore, this supervisory system successfully operates either on-grid or off-grid PV mode services.…”

Forecast-Based Energy Management for Domestic PV-Battery Systems: A U.K. Case Study

“…Likewise, a real-time PSO-based EMS of a stand-alone hybrid wind and micro-turbine energy system was presented in [10]. In [11], an EMS algorithm was proposed to control the power exchange by solving the economic dispatch problem using PSO for various scenarios to ensure safety of operation. Similarly, in [12], a mathematical energy cost formula was developed and optimized using PSO algorithm.…”