Multi-Site EV Charging Plans Under Power Capacity Limits
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Solution Overview
Problem
The challenge of balancing stable operation of power systems with efficient charging of electric vehicles is difficult due to the potential overload of system facilities, which can lead to power supply interruptions and inefficient use of power resources.
Innovation Solution
A charging planning method that allocates power to multiple charging sites within a power system, ensuring the total power received does not exceed the system's capacity, with adjustable upper limits and consideration of time slots and power sources to optimize charging efficiency and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If charging is not restricted, then charging efficiency is improved, but power system stability deteriorates due to exceeding power capacity of system facilities
Solution Approach 1:
The charging planning device creates a charging plan in advance that predicts and allocates power consumption across multiple charging sites, ensuring the total power does not exceed system facility capacity. This preliminary planning prevents power overload before it occurs, maintaining system stability while enabling efficient charging.
Solution Approach 2:
The system dynamically adjusts power allocation based on predicted power consumption at each charging site. The charging plan is created to reflect real-time or near-real-time conditions, allowing the system to optimize charging efficiency while adapting to changing power system conditions and capacity constraints.
2Reliability
If charging is restricted to maintain power system stability, then power system stability is improved, but charging efficiency deteriorates
Solution Approach 1:
The system divides the power system into multiple charging sites, each with its own predicted power consumption profile. By segmenting the overall charging load across multiple sites and time periods, the system can allocate power efficiently to each site while ensuring the aggregate power consumption remains within system facility capacity, thus maintaining stability without sacrificing overall charging efficiency.
3Productivity
If power is allocated without considering system facility capacity, then charging demand is met, but harmful effects occur due to power supply stoppage
Solution Approach 1:
The charging planning device performs preliminary action by creating a charging plan that anticipates and prevents power overload conditions. By predicting power consumption and allocating power in advance to stay within system facility capacity, the system prevents the harmful effect of power supply stoppage before it can occur, ensuring both charging demand fulfillment and system stability.
Data Source
AI summary
A charging planning method is performed by a charging planning device, and includes carrying out a first charging plan for a predetermined period for each of a plurality of charging sites that are connected to a power system and that charge electric vehicles. first charging plan is carried out such that a total of power to be received from the power system at the plurality of charging sites is less than or equal to an upper limit that is less than or equal to a power capacity of system facilities.