Multi-Phase Voltage Regulator Tap Control for Phase Balance
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Solution Overview
Problem
Existing multi-phase voltage regulators face challenges in efficiently controlling and balancing voltage levels across multiple phases in a power system, leading to inefficiencies and potential system imbalances.
Innovation Solution
A multi-phase voltage regulator controller system that includes regulator controls for each phase, an electronic processor to determine voltage thresholds, and relay systems to adjust tap changers, ensuring voltage balance by converting power between phases and adjusting tap positions based on average voltage calculations and target bandcenters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage regulators control each phase independently, then voltage regulation capability is improved, but system complexity increases
Solution Approach 1:
The system divides the multi-phase voltage regulation into independent phase control units, where each regulator control (110A-110C) manages a specific phase. This segmentation allows each controller to independently regulate its phase voltage while maintaining overall system coordination through the common processor (330), resolving the contradiction by enabling specialized control without requiring complete system redesign.
Solution Approach 2:
The processor (330) serves multiple functions: it coordinates all phase regulators, monitors system-wide voltage conditions, and implements the voltage bandcenter logic. This multi-functional approach allows a single component to handle complex coordination tasks that would otherwise require separate control systems for each phase, reducing overall system complexity while maintaining independent regulation capability.
2Measurement precision
If the system monitors all phase voltages continuously, then voltage balance accuracy is improved, but energy consumption increases
Solution Approach 1:
The system implements selective monitoring where the processor monitors phase voltages and determines when regulation is needed based on voltage bandcenter calculations. Rather than continuously actuating all regulators, the system performs partial regulation actions only when voltage imbalances exceed thresholds, maintaining measurement precision while reducing energy consumption through conditional operation.
Solution Approach 2:
The system uses feedback from voltage measurements to dynamically adjust regulator operations. The processor continuously monitors phase voltages, compares them against the voltage bandcenter, and triggers regulation actions only when deviations exceed acceptable limits. This feedback mechanism ensures high measurement precision is maintained while energy consumption is optimized by avoiding unnecessary regulation cycles.
3Stability of the object's composition
If tap changers are adjusted frequently to maintain voltage levels, then voltage stability is improved, but mechanical wear increases
Solution Approach 1:
The system calculates a voltage bandcenter that anticipates the optimal target voltage level, allowing regulators to make predetermined adjustments that prevent voltage deviations before they occur. By proactively adjusting tap positions based on predicted voltage trends and bandcenter calculations, the system maintains voltage stability while minimizing the frequency and magnitude of tap changer adjustments, thereby reducing mechanical wear.
Solution Approach 2:
The system dynamically adjusts the voltage bandcenter based on real-time phase voltage conditions, allowing the target voltage level to adapt to changing system states. This dynamic approach enables the regulators to make smoother, more efficient adjustments that maintain voltage stability while reducing abrupt or excessive tap changer movements, thereby extending component lifespan.
Data Source
AI summary
A control system for a multi-phase power system includes a first phase line, a second phase line, and a third phase line. The control system includes a plurality of regulator controls including a first regulator control configured to control a first tap changer associated with the first phase line, a second regulator control configured to control a second tap changer associated with the second phase line, a third regulator control configured to control a third tap changer associated with the third phase line, and an electronic processor coupled to the first regulator control, the second regulator control, and the third regulator control. The electronic processor is configured to regulate the voltage of the multi-phase system using the first, second, and third regulator controls.