Priority-Based Charge-Discharge Control for Smart Grid Power Limits
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Solution Overview
Problem
Existing charge-discharge control methods do not effectively utilize a smart grid's charge-discharge schedule to optimize power control in power systems, leading to inefficient charging and discharging processes.
Innovation Solution
A method that acquires differential power information and calculates element differential power based on priority, allowing for controlled charging-discharging aligned with the smart grid's schedule, efficiently managing power reception and distribution among multiple power receiving elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power consumption elements control based on total power consumption limit only, then power distribution is simplified, but charge-discharge efficiency according to smart grid schedule is reduced
Solution Approach 1:
The patent segments the power consumption control into two independent components: (1) total power consumption control based on differential power, and (2) charge-discharge control based on smart grid schedule. Each component operates independently but coordinates through the power consumption element, resolving the contradiction by dividing the control function rather than integrating it into a complex unified system.
Solution Approach 2:
The patent applies preliminary action by having the power consumption element calculate its target power consumption based on the smart grid charge-discharge schedule in advance, before receiving the differential power information. This allows the element to pre-determine its charging/discharging strategy according to peak/off-peak pricing, then adjust only within the remaining power budget, improving efficiency without requiring complex real-time coordination.
2Ease of operation
If power consumption elements use priority-based control without charge-discharge schedule, then individual element needs are met, but overall power system optimization is reduced
Solution Approach 1:
The patent implements feedback by having the power consumption element continuously monitor both the differential power information (indicating remaining power budget) and its own charge-discharge status against the smart grid schedule. This dual feedback mechanism allows the element to adjust its power consumption dynamically, meeting individual needs while minimizing conversion losses through optimized charging/discharging timing.
Solution Approach 2:
The patent changes the control parameter from simple priority-based power allocation to a composite parameter that includes both priority level and smart grid schedule timing. The power consumption element calculates target power consumption by combining these parameters, allowing it to shift charging/discharging operations to off-peak periods when conversion losses are lower, while still respecting individual element priorities.
3Stability of the object's composition
If total power consumption is strictly limited without differential power information, then power distribution is stable, but flexibility in charge-discharge control is reduced
Solution Approach 1:
The patent introduces dynamics by making the power distribution limit adaptive rather than fixed. The differential power information provides a dynamic upper bound that adjusts in real-time based on overall power system conditions. Power consumption elements can flexibly utilize up to this dynamic limit while maintaining stability, as the limit itself is continuously updated to reflect current system capacity and smart grid schedule requirements.
Data Source
AI summary
The power reception control device is configured to: acquire information indicating differential power obtained by subtracting a current value of total transmission power transmitted to an entirety of a load group via a power supply base point, from a maximum value of the total transmission power transmittable to the entirety of the load group via the power supply base point; calculate element differential power of an own power receiving element by multiplying the differential power indicated by the acquired information by a priority of the own power receiving element, the priority indicating a degree to which power reception of the own power receiving element takes priority over power reception of another power receiving element; and control charging-discharging of the own power receiving element based on the element differential power and a charge-discharge schedule of a power system.