Load Voltage Prediction for Accurate Branch Power Control
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Solution Overview
Problem
Conventional voltage control devices rely on bus line measurements, leading to errors in voltage control due to simplification of complex power systems, especially when dealing with branched equipment loads, and fail to accurately predict optimal operating voltages.
Innovation Solution
A voltage control device that collects real-time data from equipment loads, processes it statistically, predicts future voltage distribution, calculates optimal control voltages, and generates control instructions to minimize errors by directly analyzing voltage data from loads rather than relying on bus line references.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If voltage control is performed using flow calculation based on bus line measurements, then the control process is simplified, but measurement precision and voltage control accuracy deteriorate due to errors in voltage drop calculation from bus line to equipment loads
Solution Approach 1:
The patent extracts the voltage measurement function from the bus line reference point and relocates it directly to the equipment load terminals. By deploying voltage detectors at the load side, the system obtains accurate voltage data at the actual consumption point, eliminating the need for complex flow calculations and voltage drop compensations based on bus line measurements.
Solution Approach 2:
The patent introduces a voltage detector as an intermediary device positioned between the power supply system and the equipment load. This intermediary directly measures the voltage at the load terminals and provides accurate data to the controller, serving as a bridge that eliminates the information gap caused by relying on bus line measurements.
2Ease of manufacture
If conventional flow calculation methods are used with bus line as reference, then modeling is simplified, but manufacturing precision of voltage control deteriorates due to increased error in complex branched load systems
Solution Approach 1:
The system enables self-service voltage measurement at the equipment load level. Each voltage detector autonomously measures the local voltage conditions at its connected load terminals without requiring external calculation or reference to bus line parameters. This self-measurement approach provides accurate, location-specific voltage data that directly reflects actual load conditions.
3Ease of operation
If voltage drop calculation from bus line to load center is used, then voltage control can be performed, but reliability deteriorates when multiple distributed loads are connected due to increased error
Solution Approach 1:
The patent segments the voltage measurement function by deploying separate voltage detectors at different equipment load locations rather than using a single bus line measurement for all loads. This segmentation allows each load to have its own accurate voltage measurement, eliminating the cumulative errors that occur when multiple distributed loads are served by a single reference point.
Data Source
AI summary
A voltage control device includes a data collector, a statistics processor, a voltage predictor, a voltage calculator, and a controller. The data collector collects voltage data from a plurality of equipment loads. The statistics processor statistically processes the voltage data collected by the data collector according to a prediction period. The voltage predictor predicts a future voltage distribution using statistical values from the statistics processor. The voltage calculator calculates a voltage to be controlled using the future voltage distribution predicted by the voltage predictor. The controller generates an instruction to perform control at the voltage calculated by the voltage calculator.