Transformer Tap Control for Frequency-Responsive Voltage Regulation
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Solution Overview
Problem
The increasing integration of renewable energy sources in power distribution networks, such as wind and solar generators, creates challenges for traditional voltage regulation methods, leading to unstable frequency and demand management, which can result in inefficient generation and costly network interventions.
Innovation Solution
A system that automatically regulates voltage in response to frequency changes by using sensors to measure system frequency and activate network transformers to adjust voltage, thereby stabilizing frequency and demand without the need for additional generating plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional voltage regulation methods are used in passive networks, then voltage can be maintained constant on transformer output terminals, but frequency becomes unstable when renewable energy sources are integrated
Solution Approach 1:
The patent transitions from static voltage regulation to dynamic frequency-responsive regulation. The system continuously monitors frequency deviations and dynamically adjusts transformer tap positions based on real-time frequency conditions, enabling the network to adapt to varying renewable generation outputs and maintain both voltage quality and frequency stability
Solution Approach 2:
The patent implements a feedback mechanism where frequency measurements are continuously taken and used to control transformer operations. The system measures frequency deviations from nominal values and uses this feedback to automatically adjust transformer taps, creating a closed-loop control system that responds to frequency changes and maintains stability
2Reliability
If additional generating plants are installed to maintain frequency, then frequency stability improves, but network cost increases
Solution Approach 1:
The patent enables the existing network infrastructure to self-regulate frequency through automated transformer control. Instead of requiring additional generating plants, the system uses existing transformers with adjustable taps to respond to frequency deviations, allowing the network to maintain stability using its own assets without external additions
Solution Approach 2:
The patent changes the operational parameters of existing transformers by adjusting tap positions based on frequency conditions. This parameter adjustment allows existing infrastructure to perform frequency regulation functions that would otherwise require additional generating capacity, effectively changing how existing assets are utilized
3Reliability
If transformer tap changing is frequent to respond to frequency changes, then frequency regulation effectiveness improves, but transformer wear increases
Solution Approach 1:
The patent applies partial action by adjusting transformer taps only when frequency deviations exceed predetermined thresholds. Instead of continuously or excessively adjusting taps for minor frequency variations, the system selectively activates tap changing only when necessary to correct significant deviations, thereby maintaining regulation effectiveness while minimizing wear
Solution Approach 2:
The patent incorporates preliminary protective measures by establishing predetermined frequency thresholds that trigger tap adjustments. This preliminary setup prevents excessive or unnecessary tap operations by defining clear boundaries for when action is required, thereby protecting transformers from undue wear while ensuring frequency regulation occurs when needed
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
This system effectively maintains frequency within operational limits, reduces power consumption, and avoids the need for additional power generators by dynamically adjusting voltage based on real-time data analysis.
Implementation Method 1
activate network transformers to adjust voltage
Data Source
AI summary
System for controlling voltage supply to a portion of a distribution grid, the portion of the grid including a substation providing one or more circuit element operable to increase or decrease the voltage supplied to consumers within the portion of the grid. Data set includes a previously measured power consumption associated with previously measured values of at least one property for a portion of the grid. Measurement device measures the at least one property supplied within the portion of the grid. Processing device determines from the previously measured values of the at least one property in the data set an effect of altering the value of the at least one property from a first value to a second value, on the power consumption of those consumers.