A method for remote control of EV charging by modifying IEC61851 compliant EVSE based PWM signal

The Electric Vehicle (EV) has properties that can not only load but can elevate its value as a resource to the power system. An EV represents a high-power, fast-responding flexible demand unit, with an attached energy storage (battery) and the potential for bi-directional capabilities (V2G). These properties can be used in a number of power and energy services, which can support power system operation while lowering the cost of EV ownership. Such services depend on the support from the communications technologies and standards that connect controllers and logic in the EVs with those in the charging infrastructure- and back-end systems. To date, there is still no widely adopted standard that supports EV grid services, such as smart charging. This work proposes a solution that would allow any combination of charging spot and EV — individually lacking the logic, communication and controllability required for smart charging — to gain this ability by simply adhering to the widely supported IEC61851 standard. This paper describes the solution, demonstrates the implementation and discusses the potential it has for unlocking EV power- and energy services.