Grid Voltage Regulation via Frequency-Driven Tap Changes
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Solution Overview
Problem
The integration of renewable energy sources into power distribution networks has created active networks with bidirectional power flows, challenging traditional voltage regulation methods and leading to inefficiencies and increased costs due to the need for additional generating capacity and frequency stabilization.
Innovation Solution
A system that automatically regulates voltage in response to frequency changes by using sensors to measure system frequency and activate network transformers for load tap changes, thereby stabilizing frequency without the need for additional generating plants, by coordinating voltage changes to manage demand and reduce the need for new infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional voltage regulation methods are used in active networks with bidirectional power flows, then voltage control is achieved, but the system requires additional generating capacity and increases costs
Solution Approach 1:
The system enables self-service by allowing the network to automatically regulate its own voltage through distributed energy resources and demand response mechanisms, eliminating the need for additional centralized generating capacity. The network uses real-time data and automated controls to maintain voltage within acceptable ranges without external intervention or infrastructure expansion.
Solution Approach 2:
The system changes operational parameters by dynamically adjusting voltage setpoints, power factor targets, and control strategies based on real-time network conditions. This allows the existing generating capacity to operate more efficiently across varying load conditions, providing voltage regulation without requiring additional generating resources.
2Power
If additional generating plants are acquired to meet peak demand, then power supply capacity is increased, but infrastructure costs and environmental impact increase
Solution Approach 1:
The system implements dynamic capacity management by enabling flexible, real-time adjustment of power generation and consumption across the network. Distributed energy resources and demand response technologies allow the network to dynamically balance supply and demand, providing peak power capacity on-demand without requiring permanent infrastructure expansion or additional generating plants.
Solution Approach 2:
The system achieves multi-functionality by using existing network infrastructure and distributed resources to simultaneously provide voltage regulation, frequency control, and peak demand management. This universal approach allows the same assets to serve multiple functions, eliminating the need for dedicated additional generating capacity for peak demand periods.
3Stability of the object's composition
If voltage control schemes are implemented to regulate voltages supplied to the network, then voltage stability is improved, but the connection of additional Distributed Generation is constrained
Solution Approach 1:
The system applies segmentation by implementing localized voltage control at multiple distributed points across the network rather than relying on centralized control. This allows different segments of the network to independently manage voltage stability, enabling greater flexibility for Distributed Generation connections in various network locations without compromising overall voltage stability.
Solution Approach 2:
The system uses real-time feedback from distributed sensors and monitoring devices to continuously adjust voltage control strategies. This feedback mechanism allows the network to adapt to changing conditions and accommodate Distributed Generation connections by dynamically adjusting voltage setpoints and control parameters based on actual network measurements and Distributed Generation output.
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 approach effectively maintains frequency within operational limits, reduces the need for additional power generators, and provides environmental benefits by lowering power consumption and deferring the acquisition of new generating resources.
Implementation Method 1
using sensors to measure system frequency
Implementation Method 2
activate network transformers for load tap changes
Data Source
AI summary
System for controlling power consumption on a portion of a distribution grid providing electrical power to a plurality of power-consuming units and including a substation providing one or more transformers operable to increase or decrease the voltage supplied to consumers within the portion of the grid. A data set includes a previously measured power consumption associated with previously measured values of (a) property(ies) being one of voltage, current, frequency or load, or a combination thereof. A measurement device for measuring the property(ies) of the grid. A processing device to determine from the previously measured values of the property(ies) a most likely effect of altering the value(s) of the property(ies) from a first value to a second value. A storage device for storing one or more rules associating a measured condition with a corrective action. The system being operable to determine whether a measurement meets a measured condition of a stored rule.