Voltage Regulation Control for CVR and Line Loss Balance
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Solution Overview
Problem
Existing power systems face challenges in optimally controlling load voltages due to increased line losses and voltage drops from Conservation Voltage Reduction (CVR), which diminish the power reduction effect.
Innovation Solution
A voltage control device and method that sets a loss function to calculate a target voltage, considering both power reduction due to CVR and line resistance, using a voltage control module, power loss predictor, and cooperative controller to regulate voltages within an allowable power range, optimizing power supply to loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If voltage is reduced to achieve power reduction through CVR, then power consumption is reduced, but power loss due to line resistance increases
Solution Approach 1:
The patent changes the control parameter from simple voltage reduction to optimized voltage setting that considers both CVR power reduction and line loss. The cooperative controller adjusts voltage levels dynamically by calculating target voltages that balance these two opposing effects, thereby resolving the contradiction between reducing power consumption and minimizing power loss.
Solution Approach 2:
The patent implements a feedback mechanism where the cooperative controller continuously monitors voltage, power consumption, and line loss data, then adjusts the target voltage accordingly. This closed-loop control ensures that voltage settings optimize the balance between CVR benefits and line loss penalties in real-time.
2Loss of energy
If voltage is reduced excessively to maximize power reduction, then energy savings increase, but voltage stability deteriorates
Solution Approach 1:
The patent optimizes voltage control parameters by setting target voltages within specific ranges that prevent excessive reduction. The cooperative controller calculates target voltages that achieve energy savings while maintaining voltage stability through constrained optimization rather than unrestricted voltage reduction.
Solution Approach 2:
The patent prepares compensatory measures in advance by setting minimum voltage thresholds and using the cooperative controller to predict and prevent voltage instability before it occurs. The system cushions against excessive voltage reduction by pre-establishing safe operating boundaries.
3Ease of operation
If traditional one-sided CVR control is applied, then implementation simplicity is maintained, but optimization accuracy decreases
Solution Approach 1:
The patent merges the CVR control function with line loss compensation function into a single cooperative controller. This integration allows the system to simultaneously consider both power reduction and line loss minimization, achieving higher optimization accuracy while maintaining relatively simple implementation through unified control logic.
Solution Approach 2:
The cooperative controller performs multiple functions: it manages CVR power reduction, compensates for line losses, calculates target voltages, and maintains voltage stability. This multi-functional approach enhances optimization accuracy without requiring separate specialized controllers for each function.
Data Source
AI summary
A voltage control device includes a voltage control module being able to regulate a voltage that is supplied to a load or is transmitted backward from a load, a power loss predictor predicting or calculating a power loss amount due to a line of a power system, and a cooperative controller giving the target voltage to the voltage regulation module. A voltage control method includes a data collection step in which power data of a voltage regulation module, which is configured to regulate a voltage that is supplied to a load or is transmitted backward from a load, are transmitted to a data collector, a target voltage calculation step of calculating a target voltage to be regulated of the voltage regulation module, and a voltage control step of controlling the voltage regulation module at a target voltage or giving the target voltage to the voltage regulation module.