Distributed Power Factor Correction for Grid Phase Balancing
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Solution Overview
Problem
The increasing prevalence of localized electrical generation facilities leads to power factor (PF) distortions in the electric power grid, as electronic loads do not behave ideally, causing imbalances and distortions in the relationship between current and voltage, which existing technologies fail to effectively correct.
Innovation Solution
A distributed power management system that includes monitors and controllers communicatively coupled to capture PF data, allowing for synchronized PF correction commands to be sent to local loads and generators to balance the power grid, maintaining or optimizing PF to a value of 1, even in polyphase systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If localized electrical generation facilities are increased to meet distributed power needs, then power supply flexibility and local energy production are improved, but power factor distortions and phase imbalances worsen due to non-ideal electronic loads
Solution Approach 1:
The patent divides the power factor correction function into distributed segments across the grid. Each local generation facility is equipped with its own controller that independently monitors and corrects power factor at its specific location, rather than relying on centralized correction. This segmentation allows each segment to handle its own electronic load distortions locally.
Solution Approach 2:
The system dynamically adjusts the power factor parameter at each distributed generation facility by controlling the phase relationship between current and voltage. Controllers modify operating parameters such as phase angle and current magnitude to maintain optimal power factor despite varying load conditions, transforming the system from static to dynamic parameter control.
2Device complexity
If traditional centralized power factor correction methods are used, then simple control logic is maintained, but they fail to effectively correct PF distortions in distributed grid segments
Solution Approach 1:
The centralized correction approach is segmented into multiple distributed correction units. Each unit operates autonomously within its local grid segment, monitoring and correcting power factor independently. This maintains relative simplicity at each node while collectively solving the distributed correction problem that centralized systems cannot address effectively.
Solution Approach 2:
Each distributed generation facility performs self-correction of its power factor through local controllers that autonomously monitor their own electrical parameters and adjust their operation accordingly. This self-service capability eliminates the need for complex centralized control while improving correction effectiveness at each location.
3Power
If polyphase systems with high load on certain phases are used to meet demand, then power delivery capacity is improved, but phase imbalance and grid stability worsen
Solution Approach 1:
The system dynamically adjusts current magnitude and phase angle parameters for each phase based on real-time load conditions. When one phase experiences high load, the controller modifies the operating parameters of distributed generation facilities connected to that phase to balance the overall phase composition, maintaining stability while accommodating variable power demands.
Solution Approach 2:
Controllers continuously monitor phase current and voltage parameters, using this feedback information to detect imbalances. When phase imbalance is detected, the system automatically adjusts generation output parameters to restore balance, creating a closed-loop control system that maintains phase stability under varying load conditions.
Data Source
AI summary
A power management system includes a plurality of monitors, communicatively coupled together over a communications medium. Each respective monitor of the plurality of monitors is configured to capture power factor (PF) data at a corresponding distribution segment for calculation of a PF correction.