Siemens and Duke Energy showcase their new cloud-based EV charging system
Siemens and Duke Energy have been working on an electric vehicle charging system at a lower cost while assuring grid reliability.
The 18-month job results were shown at Duke Energy Envision Center in Erlanger, Ky. The companies used a Ford Fusion Energi Plug-In Hybrid to present the first Underwriters Laboratories (UL) approved residential electric vehicle supply equipment (EVSE) able to monitor status, report energy use, and be controlled locally from the local area network and from the cloud.
The EVSE is accessible from remote web-connected computers, smartphones or tablets in order to provide the owner with a better way to monitor the status of the EV charging, schedule future charge events, and control the total kWh consumed and the cost of charging.
The companies claim an EV owner can better understand what they are spending to charge the car as well as schedule charging process to be activated when rates are lowest. Furthermore, the system also allows utilities to offer programs that help manage the time and level of EV charging across the grid to increase grid reliability and efficiency while minimizing peak demand.
“This demonstration marks a turning point for the EV industry and proves the tangible benefits of bringing advanced EVSE technologies into the home and the power marketplace,” said Barry Powell, head of Siemens Low Voltage & Products. “Intelligence in EV charging stations means homeowners can reduce the cost of charging up to 60 percent by automatically charging during low energy rate periods, where such programs are available. Utilities can shift loads off critical peak periods to avoid the need for new generation sources.”
“As EVs gain in popularity, it will be important for both drivers and utilities to have improved information -- making charging more available and cheaper," said Mike Rowand, director, Technology Development at Duke Energy.
The system can also be monitored and controlled from an OpenADR, an open standard for Automated Demand Response, allowing utilities to manage grid load resources remotely and automatically.
By using OpenADR or by directly accessing the Siemens Cloud, utilities can offer rate programs to EV owners to allow the consumer to charge at highly attractive rates while simultaneously allowing the utility to manage the loads on the grid. By shifting each EV charging event slightly in time, utilities can potentially reduce the peak demand on the grid, which in turn helps to reduce the total amount of generation needed.
The demonstration was funded as part of a grant received from the U.S. Department of Energy’s (DOE) Office of Electricity Delivery and Energy Reliability (OE), which supports the development of EVSE’s that are capable of implementing smart charging of EVs, referred to as smart grid-capable EVSE. A goal of the OE Smart Grid Research and Development (R&D) Program is to develop and implement smart grid technologies to support transportation electrification.