Centralized control of parallel connected power conditioning system in electric vehicle charge–discharge and storage integration station

Abstract

This study presents a centralized control scheme that coordinates parallel operations of power conditioning system (PCS) for the grid interactions of electric vehicles (EVs) in EV charge-discharge and storage integration station. Key issues for the control and operation of PCS under various operation modes are discussed, including vehicle to grid (V2G) mode, stand-alone mode and seamless transfer mode. The intelligent multi-mode charge-discharge method is utilized for the V2G mode, and the parallel control method based on communication network is adopted for the standalone mode. In addition, a novel seamless transfer strategy is proposed, which is able to implement PCS transition between V2G mode and stand-alone mode. The detailed process of the seamless transfer between the two modes is illustrated. Experimental results are presented to show the performance and feasibility of this strategy.

WITHDRAWN: Control Algorithm Validation Using PLC based Hardware Test-Bench for Stable Microgrid Automation

“…The PLC can be identified as a programming-based robust, reliable, flexible, and quick-quality decision-making controller adapted for automatic operations in various engineering fields [15]. In the literature, multiple applications of PLCs have been reported [16][17][18][19][20][21][22][23][24]. Some of the critical pieces of literature have been discussed in the following part of this section.…”

“…Likewise, the advanced application of PLC been presented in [17], employing the laboratory emulator to test the frequency-based logic for the stable operation of the rural micro-hydroelectric system. Considering the low-cost development of laboratory-based three-phase MG with PLC, [18] demonstrates a DC drive control for balanced line voltages and stable operation. The control has been carried out based on the programming logic and signals.…”

Challenges and opportunities of FACTS devices interacting with electric vehicles in distribution networks: A technological review

“…The purpose of this work effort is to create a statistical framework that can estimate the usage of electric vehicle chargers in any town, especially in San Diego [17]. This paper provides a centralized control approach for grid interconnections of EVs in EV charge-discharge and storing integrate terminals that manage concurrent functions of a power conditioning system (PCS) [18]. While incorporating local wind and PV power outputs, the goal of this research is to propose a regulated EV recharging approach to MAX the grid's peak-valley disparity [19].…”

Electric Vehicle-to-Grid (V2G) Technologies: Impact on the Power Grid and Battery

“…In a centralized control strategy, an aggregator operator (AO) takes the central charge of acquiring data from the connected EVs across the network and dispatches the required control signals to manage bi-directional power flow between UG and EV. The AO schedules each connected EV according to the load demand and generation and optimizes the energy loading/unloading respective to the vehicles' battery capacity and charging/discharging routine [132]. The AO acts as the central controller and is responsible for planning, setting, and tuning the electricity prices in V2G via an intelligent metering infrastructure at the charging infrastructure.…”

“…Power transfer between EV and UG could be operated in three basic modes: V2G mode requiring intelligent multi-mode control; stand-alone mode requiring parallel control mode, and seamless transfer between the stand-alone and V2G mode requiring voltage-current double-loop control [132]. Figure 20 demonstrates the control management techniques with flexible services and value streams to initiate a smooth integration of the EV battery with the power grid for successful V2G integration.…”