Energy Routing Control Strategy for Integrated Microgrids Including Photovoltaic, Battery-Energy Storage and Electric Vehicles

Abstract

The Energy Internet is an inevitable trend of the development of electric power system in the future. With the development of microgrids and distributed generation (DG), the structure and operation mode of power systems are gradually changing. Energy routers are considered as key technology equipment for the development of the Energy Internet. This paper mainly studies the control of the LAN-level energy router, and discusses the structure and components of the energy router. For better control of the power transmission of an energy router, the energy routing control strategy for an integrated microgrid, including photovoltaic (PV) energy, battery-energy storage and electric vehicles (EVs) is studied. The front stage DC/DC converter of the PV system uses maximum power point tracking (MPPT) control. The constant current control is used by the bidirectional DC/DC converter of the battery-energy storage system and the EV system when they discharge. The DC/AC inverters adopt constant reactive power and constant DC voltage control. Constant current constant voltage control is adopted when an EV is charged. The control strategy model is simulated by Simulink, and the simulation results verify the feasibility and effectiveness of the proposed control strategy. The DG could generate reactive power according to the system instructions and ensure the stable output of the DC voltage of the energy router.

Power Electronics in Renewable Energy Systems

“…Rizqiawan et al [8] introduce the development of grid-connected inverter modules intended for teaching microgrid issues to electrical engineering students. Liu et al [9] introduce issues related to the concept known as Energy Internet, where microgrid control is implemented based on the internet by utilizing the concept of an energy router. In this study, the primary energy sources are considered to be a photovoltaic array, an energy storage battery, and the battery of an electric vehicle.…”

Off-Grid System Configurations for Coordinated Control of Renewable Energy Sources

“…The same technique is utilized for DGs to synchronize with the PCC and to achieve the desired performance. In the SPVA system, single and two-stage converter-based configurations are used to connect the SPVA to the PCC and to achieve maximum power point tracking (MPPT) [33,34]. A comparative study on existing MPPT methods is detailed in [35,36].…”

Constant Frequency Control Strategy of Microgrids by Coordinating Energy Router and Energy Storage System

“…e microgrid has become one of the effective ways to dissipate distributed energy sources (DER) [1,2]. Among them, microgrids with ER as the core have been proposed successively [3][4][5].…”