AC Power Source Frequency Signaling for Overload Load Control
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Solution Overview
Problem
Existing power systems struggle to efficiently manage and control loads to prevent overloads, which can lead to inefficiencies and potential damage, particularly in backup generators, due to variations in load demands and environmental factors.
Innovation Solution
An intelligent load management system that connects and disconnects loads based on real-time conditions, load priorities, and environmental parameters to maintain the total load within the power source's capacity or optimize efficiency, using electronic circuitry and decision-making algorithms to prevent overloads and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power source operates at maximum output capability, then the power supply reliability is improved, but the efficiency deteriorates due to operating conditions varying from optimum
Solution Approach 1:
The system dynamically adjusts the load configuration by connecting or disconnecting individual loads based on real-time monitoring of power source output and efficiency parameters. This dynamic reconfiguration allows the system to adapt between operating at maximum capability for reliability or optimizing for efficiency based on current conditions
Solution Approach 2:
The control system monitors and responds to changes in operating parameters such as power output, efficiency metrics, and environmental conditions. By detecting when the power source deviates from its efficiency curve, the system changes the operational state by selectively connecting or disconnecting loads to restore optimal efficiency or maintain reliability
2Productivity
If multiple loads are connected to maximize power utilization, then the productivity is improved, but the risk of overload and damage increases
Solution Approach 1:
The system performs preliminary assessment of load requirements and power source capability before connecting loads. The control system evaluates whether connecting an additional load would cause overload conditions, and only permits connections when safe operating margins exist, preventing damage before it occurs
Solution Approach 2:
The system continuously monitors the actual power output and load conditions, providing feedback to the control algorithm. This real-time feedback enables the system to detect approaching overload conditions and automatically disconnect appropriate loads to prevent damage, while still maximizing safe power utilization
3Device complexity
If the system operates without intelligent load management, then the device complexity is reduced, but the loss of time due to inefficiencies and overload recovery increases
Solution Approach 1:
The system implements self-service through automatic load management where the control algorithm independently monitors conditions and makes connection/disconnection decisions without human intervention. This automated self-management prevents overloads and inefficiencies, reducing recovery time despite the added control system complexity
Data Source
AI summary
A method and apparatus for controlling the total load presented to an AC power source such as a generator or inverter used to provide backup or portable power. The frequency of the output AC power is controlled in response to the loading on the power source, thereby providing information about that loading of the power source which is carried by the AC power itself, thus reducing or eliminating the need for traditional wired and wireless communications. By controlling the frequency of AC power, controllable loads and load control devices can determine the amount of remaining power available from the power source in order to determine if a given load can be connected without creating an overload. The frequency may also be controlled at the power source to indicate an overload, with the loads being responsive to that overload frequency to reduce the load and thereby alleviate the overload.