Yes, OCPP 2.0.1 supports real-time power throttling for individual chargers during peak grid demand without interrupting active sessions. This is achieved through the SetChargingProfile and ChangeAvailability messages, which allow dynamic adjustment of charging power while maintaining session continuity and ISO 15118 Plug & Charge compliance.
How It Works in Practice
OCPP 2.0.1 enables operators to define charging profiles that adapt to grid conditions in real time. When a utility or grid operator signals a need to reduce load, the system can lower the maximum power level for specific chargers. This throttling occurs at the charging station level, using the SetChargingProfile message to update charging parameters without stopping ongoing sessions.
The protocol supports both absolute and relative power limits. For example, a charger can be instructed to reduce its power to 50% of its maximum capacity while a session is active. This ensures that the charging process continues, but with adjusted power levels to meet grid demand.
Importantly, the system maintains session integrity by not sending a StopTransaction message. Instead, it modifies the charging profile, which allows the vehicle to continue charging with the new parameters. This is particularly useful in fleet or commercial settings where uninterrupted charging is critical.
What This Means for Charge Point Operators
For Charge Point Operators (CPOs), OCPP 2.0.1’s real-time throttling capability provides a powerful tool for grid support and demand response programs. It allows them to participate in programs like Time-of-Use (ToU) pricing or peak shaving without sacrificing customer experience.
Operators can also use this feature to comply with local regulations or utility agreements that require dynamic load management. For instance, during high-demand periods, a CPO might receive a signal to reduce charging power across their network, and OCPP 2.0.1 ensures this is done seamlessly.
This functionality also supports integration with smart energy management systems. By combining OCPP 2.0.1 with local energy storage or renewable energy sources, operators can optimize charging schedules to align with clean energy availability, further enhancing sustainability and cost efficiency.
Related Reading
For more on related topics, see: OCPP 2.0.1 Dynamic Power Adjustment During Session.
Further reading: EV Charging Energy Management | OCPP Smart Charging CMS | Tecell India
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