Voltage Dip Compensator Tap Control
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Solution Overview
Problem
Current voltage dip compensators are ineffective for long-duration voltage drops due to their limited size, failing to maintain a stable load voltage beyond their short compensation duration.
Innovation Solution
A system incorporating a detector and switch selector that continually adjusts to maintain load voltage within ±1 to 5% of the nominal value by activating appropriate taps on a secondary transformer side, using a voltage dip/swell detector with a comparator and level detection/switch selection device to manage voltage dips and undervoltages lasting from seconds to 48 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If storage elements (capacitors or flywheels) are used for voltage dip compensation, then response time is quick, but compensation duration is very short and limited by physical size
Solution Approach 1:
The patent replaces mechanical storage elements (capacitors, flywheels) with an electronic control system comprising a detector, comparator, and switch selector that controls transformer taps. This substitution eliminates the physical size limitation of storage elements while maintaining quick response through electronic detection and control, enabling long-duration compensation without the trade-off between response time and duration that plagues storage-based systems.
2Duration of action of moving object
If storage element size is increased to extend compensation duration, then compensation duration is extended, but physical size and cost increase
Solution Approach 1:
The patent eliminates the need for large physical storage elements by substituting them with an electronic control system. The detector continuously monitors supply voltage, and when undervoltage is detected, the comparator triggers the switch selector to activate appropriate transformer taps, providing extended compensation duration without increasing physical size or cost.
Solution Approach 2:
The transformer with multiple taps serves multiple functions: it provides both normal voltage transformation and undervoltage compensation by selecting different taps based on detector signals. This multi-functionality eliminates the need for separate storage elements, achieving extended compensation duration without additional physical volume.
3Speed
If storage elements are used for voltage compensation, then quick response is achieved, but effectiveness lasts only for short duration dependent on storage element size
Solution Approach 1:
The patent replaces storage elements with an electronic control system that provides both quick response and sustained reliability. The detector immediately detects voltage dips, the comparator quickly processes the signal, and the switch selector rapidly activates appropriate transformer taps. This electronic system maintains compensation effectiveness indefinitely as long as the undervoltage condition persists, unlike storage elements that deplete their energy reserves.
Solution Approach 2:
The detector continuously monitors the supply voltage and provides feedback to the comparator and switch selector. This closed-loop feedback ensures that compensation is maintained as long as undervoltage conditions exist, providing sustained reliability without the time-limited effectiveness of storage-based systems.
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
The system effectively maintains load voltage stability within ±1 to 5% of the nominal value even during 60% supply voltage dips, ensuring continuous compensation for extended periods.
Implementation Method 1
By passing the supply voltage through an appropriate transformer winding, a load voltage can be maintained to its nominal value.
Data Source
AI summary
The present invention relates a system for compensating for a voltage dip and undervoltage containing a primary side and secondary side transformer, a voltage dip/swell detector, and a level detector/switch selector device, wherein the secondary side of the transformer possesses a minimally sufficient number of taps to allow the system to be modified to meet supply voltage dips. The system, in particular, allows for long term compensation of voltage dips and quick adjustment of load voltage, usually within one cycle. Methods of using the present invention are also presented.