Overload Transformer Load Park Power Management
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Solution Overview
Problem
The high operating costs associated with providing a charging infrastructure for electric vehicles, particularly due to the need for a medium-voltage grid connection and the restrictive availability of services in medium-voltage grids, result in excessive network connection fees for High Power Charging (HPC) parks.
Innovation Solution
A method and system utilizing an overload-capable transformer to connect multiple charging points to a medium-voltage grid, with centralized monitoring and power management to adjust the average power drawn from the grid over a specified time interval, allowing for temporary peaks in power usage without exceeding the maximum agreed-upon power, thus optimizing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a medium-voltage grid connection is provided for high power charging points, then charging speed is improved, but network connection fees increase
Solution Approach 1:
The patent applies dynamics by implementing dynamic load management that adjusts power distribution in real-time based on actual charging needs. The system monitors the charging status of all vehicles and dynamically allocates power from the medium-voltage grid only when necessary, rather than maintaining a static high-power connection. This allows the charging park to utilize fast charging capabilities selectively, reducing network connection fees while maintaining charging speed when needed.
Solution Approach 2:
The system changes the parameter of power consumption by dynamically adjusting the power draw from the medium-voltage grid based on actual charging requirements. By monitoring charging currents and voltages in real-time, the system optimizes the power parameters to minimize fees while ensuring that vehicles receive adequate charging power when required.
2Productivity
If full power is provided at all charging points simultaneously, then charging efficiency is improved, but transformer overload occurs
Solution Approach 1:
The patent applies partial action by providing full power to only those charging points that currently have vehicles requiring charging, rather than maintaining full power capacity at all points continuously. The system monitors the charging status and activates power delivery selectively, allowing the transformer to operate within safe limits while still achieving high charging efficiency when vehicles are present.
Solution Approach 2:
The system implements feedback by continuously monitoring the charging status, power consumption, and transformer load conditions. Based on this real-time feedback, the control system dynamically adjusts power distribution to prevent transformer overload while maximizing charging efficiency. The feedback loop ensures that power is allocated optimally based on actual needs.
3Use of energy by stationary object
If a simultaneity factor is applied to reduce network connection costs, then operating costs are reduced, but charging time extends when full power is required
Solution Approach 1:
The patent replaces the static simultaneity factor approach with dynamic load management that responds to real-time charging conditions. When multiple vehicles are charging simultaneously, the system monitors their individual needs and dynamically allocates power to meet the aggregate demand without unnecessarily extending charging times. This dynamic approach reduces operating costs more effectively than fixed simultaneity factors while preventing charging time extensions.
Solution Approach 2:
The system enables self-service by allowing the charging infrastructure to automatically monitor and adjust its own power consumption based on actual charging needs. The intelligent control system manages power distribution autonomously, optimizing the balance between operating costs and charging time without requiring manual intervention or rigid simultaneity factors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables full power charging at all points simultaneously without extending charging times or incurring additional fees, by dynamically managing power distribution within the specified billing interval, thereby reducing operational costs and enhancing charging efficiency.
Implementation Method 1
a so-called overload-capable transformer via which a plurality of charging points 10_1, . . . 10_n can be connected to a medium-voltage network 20
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a method for providing a charging park with a plurality of charging points (10_1, ..., 10_n), in which all charging points (10_1, ..., 10_n) are connected to a medium-voltage network (20) via a common overload-capable transformer (14), power electronics (12_1, ..., 12_n) are provided at each charging point (10_1, ..., 10_n) which are designed to carry out a fast-charging process of a connected and to-be-charged electrically powered vehicle, and at a network connection point (15) connected upstream of the transformer (14) towards the medium-voltage network (20), the power drawn jointly from the medium-voltage network (20) by the charging points (10_1, ..., 10_n) at any given time is monitored centrally and/or decentrally and continuously, wherein an average of the charging points (10_1, ...The power drawn jointly from the medium-voltage network (20) by 10_n is regulated over a predetermined time interval (16_4). Furthermore, the present invention relates to a corresponding system.