EV Charging Port Curtailment for Facility Demand Control
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Solution Overview
Problem
Facilities with electric vehicle charging stations face increased energy demands that can lead to higher utility tariffs and costs, necessitating effective load management strategies to optimize energy consumption and reduce these charges.
Innovation Solution
Implementing a facility load management system that monitors and adjusts energy consumption of EV charging stations based on State of Charge (SOC) and load distribution strategies, using dynamic and static load management techniques to maintain energy delivery within circuit breaker limits and avoid utility tariffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If EV charging stations operate at full power to meet charging demand, then charging service quality is improved, but energy consumption increases triggering utility tariffs
Solution Approach 1:
The system dynamically adjusts the power delivery of EV charging ports based on real-time facility energy consumption levels and circuit breaker capacity. When energy consumption approaches tariff-triggering thresholds, the system automatically reduces charging power delivery, creating a dynamic balance between service availability and energy consumption management
Solution Approach 2:
The system changes operational parameters of EV charging ports by adjusting power delivery levels based on facility energy consumption status. This includes modifying charging rates and power allocation to maintain service functionality while preventing energy consumption from triggering utility tariffs
2Loss of energy
If energy consumption is curtailed to avoid utility tariffs, then energy costs are reduced, but charging service quality deteriorates
Solution Approach 1:
The system applies differentiated curtailment strategies to different EV charging ports based on their individual charging states, vehicle battery levels, and priority classifications. This ensures that curtailment actions are localized and targeted rather than blanket reductions, preserving charging service quality for high-priority ports while managing overall energy consumption
Solution Approach 2:
The system enables EV charging ports to self-regulate their power delivery based on received control signals, automatically adjusting their operation to meet energy consumption targets while maintaining acceptable service levels. The ports independently implement curtailment actions based on their current charging state and system directives
3Use of energy by moving object
If dynamic load management is applied to adjust charging power, then energy consumption is optimized, but system complexity increases
Solution Approach 1:
The system implements feedback loops that continuously monitor facility energy consumption, EV charging port status, and circuit breaker capacity. This real-time feedback enables automated adjustments to charging power delivery, optimizing energy consumption while maintaining service quality without requiring complex manual intervention systems
Data Source
AI summary
Methods and systems for curtailing an electrical load presented by an EV charging station having one or more EV charging ports. The methods and systems may include receiving a curtailment instruction and curtailing energy consumption of an EV charging station by curtailing each of one or more of the EV charging ports of the EV charging station by a corresponding EV charging port curtailment amount. The EV charging port curtailment amount for each of one or more selected EV charging ports may be dependent on a state of charge of the EV that is receiving energy from the corresponding EV charging port. The curtailing of power and/or energy output at an EV charging station may reduce utility tariffs applied by a utility to the facility.