Dynamic Power Factor Correction via Reactive Load Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power delivery systems face inefficiencies due to reactive components in loads causing power factor degradation and harmonic distortion, leading to increased current usage and reduced energy transfer efficiency.
Innovation Solution
A dynamic power factor correction system that measures reactive power and adjusts by coupling corrective reactive loads to the load, while also reducing distortion by comparing electrical signals to a reference and modulating current sourcing/sinking to correct harmonic distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed reactive loads are coupled to the power line to correct power factor, then power factor improvement is achieved, but the system cannot adapt to dynamic load changes requiring continuous manual monitoring and adjustment
Solution Approach 1:
The patent implements dynamic power factor correction by automatically adjusting the reactive load coupling based on real-time power factor measurements. The system transitions from static fixed reactive loads to dynamic adaptive correction, where the corrective reactive load is selectively coupled or decoupled automatically without manual intervention, resolving the contradiction between reliable correction and ease of operation
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring the power factor of the power line and using this information to control the coupling/decoupling of corrective reactive loads. This closed-loop feedback system enables automatic adaptation to changing load conditions, eliminating the need for continuous manual monitoring while maintaining effective power factor correction
2Adaptability or versatility
If multiple fixed reactive loads are selectively coupled to correct dynamic power factor, then power factor adaptability is improved, but system complexity increases requiring monitoring equipment and control mechanisms
Solution Approach 1:
The patent implements a self-service power factor correction system where the corrective reactive loads automatically adjust themselves based on embedded control logic that monitors power factor conditions. The system performs self-diagnosis and self-adjustment without requiring external monitoring equipment or complex control mechanisms, achieving adaptability while minimizing added complexity
Solution Approach 2:
The system merges the monitoring and control functions directly into the power factor correction apparatus itself, combining multiple functions (monitoring, decision-making, and execution) into an integrated unit. This consolidation reduces the need for separate monitoring equipment and simplifies the overall system architecture while maintaining adaptability to dynamic power factor conditions
3Power
If AC-DC converters with large capacitors are used to supply power to devices, then power conversion is achieved, but harmonic distortion is injected into the power network
Solution Approach 1:
The patent applies the principle of converting harm into benefit by using the large capacitors in AC-DC converters not only for their intended power conversion function but also as adjustable reactive loads for power factor correction. The system dynamically adjusts the coupling of these capacitors to provide corrective reactive power, thereby converting the harmful harmonic distortion effect into a beneficial power factor correction mechanism
Solution Approach 2:
The system implements multi-functionality by enabling AC-DC converter capacitors to serve dual purposes: their traditional power conversion function and an additional power factor correction function. By selectively coupling or decoupling these capacitors, the system achieves both power supply and harmonic distortion mitigation, reducing the need for separate correction devices
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Methods and apparatus for power factor correction include selectively coupling bit reactive loads with a load having dynamic reactive properties to dynamically correct a power factor. Methods and apparatus for reducing distortion in a power delivery system include a means for determining distortion in a power line, forming a corrective signal according to the distortion and selectively sinking and sourcing current to the power line according to the corrective signal.