Dynamic EV Charging Power Control via Meter Feedback
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Solution Overview
Problem
Electric vehicle recharging terminals often trip electrical installations due to exceeding contract power limits, and existing solutions rely on static adjustments that fail to adapt to changing consumer habits or meter communication limitations.
Innovation Solution
An energy control device with an energy measuring module, communication module, and control module that calculates instantaneous power and adjusts the recharging terminal's power dynamically based on contract and actual power usage, using high-frequency queries only when power variations exceed a set threshold, ensuring safe operation without overloading the communication link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the maximum power of the recharging terminal is increased to reduce charging time, then the charging speed improves, but the risk of tripping the electrical installation increases
Solution Approach 1:
The patent implements dynamic power adjustment by continuously monitoring the instantaneous power consumed by the electrical installation and adapting the recharging terminal's power output in real-time. The control unit receives power consumption data from the meter and dynamically modifies the charging power to stay within safe limits while maximizing charging speed when available capacity permits.
Solution Approach 2:
The system establishes a feedback loop where the control unit regularly queries the meter for instantaneous power consumption data and uses this information to adjust the recharging terminal's power output. This closed-loop control ensures that the charging power is continuously optimized based on actual grid conditions and available capacity.
2Power
If the contract power at the meter is increased to allow higher recharging power, then the maximum available power increases, but the cost of electrical energy increases
Solution Approach 1:
The patent changes the operational parameters of the recharging terminal by dynamically adjusting the power output based on real-time monitoring of instantaneous consumption rather than relying on static contract power limits. This allows the system to utilize available capacity up to the contract limit without exceeding it, effectively maximizing power usage within existing contractual constraints.
3Adaptability or versatility
If the recharging terminal queries the meter at high frequency to accurately track available power, then the adaptability to power changes improves, but the communication volume and link capacity requirements increase
Solution Approach 1:
The control unit implements periodic querying of the meter at predetermined time intervals rather than continuous monitoring. This periodic action provides sufficient adaptability to track power consumption changes while significantly reducing the communication volume and data transmission requirements compared to continuous high-frequency monitoring.
4Power
If the recharging time is delayed to late night hours when other apparatuses reduce consumption, then the available power at the meter increases, but the total recharging time increases
Solution Approach 1:
The system dynamically adjusts the recharging terminal's power output throughout the charging process based on real-time monitoring of instantaneous power consumption. This allows charging to proceed at maximum available power during periods when other apparatuses are active, eliminating the need to delay charging until late night hours when consumption patterns are more favorable.
Data Source
AI summary
An electric energy control device includes: a measuring device to measure an electric current; a voltage sensor to measure an electric voltage; and a power calculation unit which receives current information from the current sensor and voltage information from the voltage sensor, and is configured to calculate the electric power consumed at the power output of the electric meter. The device also includes a control member which receives information concerning the electric power consumed from the power calculation unit, calculating the difference between the electric power information item and a preceding value, if an absolute value of the difference being less than the threshold remaining idle and if an absolute value of the difference being greater than the threshold outputting a message containing a power value to a terminal for recharging an electrical storage battery. The recharging terminal being remote from the measuring and control members.