Power Control System for CPE Reverse Feeding
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Solution Overview
Problem
Reverse power feeding of remote network nodes faces inefficiencies due to limitations in power delivery from customer premises equipment (CPE) devices, leading to potential disconnection of power sources and increased demand on remaining CPE devices, resulting in suboptimal usage of available power and larger energy storage device requirements.
Innovation Solution
A power control system that uses a controller to regulate power flow between CPE devices and an energy storage device based on input parameters such as power drawn, operating power requirements, and available energy, activating charger or discharger converters to manage power distribution and storage efficiently, ensuring power is directed from CPE devices to the energy storage device or vice versa, depending on reference values set to prevent power limit violations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If reverse power feeding is implemented without active power control, then power can be drawn from nearby CPE devices, but power delivery inefficiencies occur and CPE devices may disconnect due to power limits being exceeded
Solution Approach 1:
The power control system continuously monitors the total power drawn from CPE devices and compares it against power delivery limits. When the limit is approached or exceeded, the controller actively adjusts power distribution by directing excess power to the energy storage device or reducing power to individual CPE devices, preventing disconnections and maintaining stable power delivery throughout the system.
Solution Approach 2:
The system proactively manages power distribution by predicting when CPE devices might exceed their power delivery limits. The controller preemptively redirects power to the energy storage device before disconnections occur, cushioning against potential power failures and maintaining system reliability.
2Duration of action of moving object
If larger energy storage devices are used to compensate for insufficient instantaneous power from CPE devices, then prolonged operation can be maintained, but system complexity and cost increase
Solution Approach 1:
The system dynamically adjusts the role of the energy storage device based on real-time power conditions. Rather than requiring a large fixed-capacity storage device, the controller flexibly manages power flow between CPE devices and the energy storage device, allowing the storage device to buffer power deficits temporarily while maintaining prolonged operation with a smaller, more cost-effective unit.
Solution Approach 2:
The controller changes operational parameters by adjusting power distribution ratios between multiple CPE devices and the energy storage device based on their individual power capacities and current demand conditions. This dynamic parameter adjustment optimizes the utilization of available power resources, extending operation duration without requiring oversized energy storage.
3Power
If power is continuously drawn from CPE devices without management, then instantaneous power demand can be met, but suboptimal usage of available power occurs and remaining CPE devices face increased demand
Solution Approach 1:
The controller performs preliminary assessment of each CPE device's power capacity and current status before allocating power demands. By pre-coordinating power distribution and proactively managing the energy storage device charging/discharging cycles, the system ensures optimal utilization of available power from all CPE devices while meeting instantaneous power requirements.
Solution Approach 2:
The energy storage device acts as an intermediary buffer between multiple CPE devices and the power-consuming system. The controller mediates power flow through this intermediary, balancing the load across all CPE devices and preventing any single device from being overloaded, thereby optimizing overall power usage efficiency while maintaining instantaneous power availability.
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
This solution optimizes power usage by efficiently charging and discharging energy storage devices, reducing the size requirements for energy storage and enhancing system robustness against temporary power interrupts, while ensuring safe operation within power delivery conditions.
Implementation Method 1
a charger power converter configured for directing power from the number of CPE devices to the energy storage device
Implementation Method 2
a discharger power converter configured for directing power from the energy storage device to the power consuming system
Data Source
Figure 1~3A
Figure 3B
Figure 3C
AI summary
A power control system for controlling reverse power feeding of a network node from a number of customer premises equipment, CPE, devices being subject to power delivery conditions; wherein the network node comprises a power consuming system and an energy storage device; the system comprising: a charger power converter configured for directing power from the number of CPE devices to the energy storage device; a discharger power converter configured for directing power from the energy storage device to the power consuming system; and a controller configured for: receiving a first input indicating power drawn from the number of CPE devices; receiving a second input indicating operating power for the power consuming system; receiving a third input indicating available energy in the energy storage device; and based on the received first, second and third inputs, controlling at least one of the charger power converter and the discharger power converter.