Generator Excitation Control Using Adaptive Inter-Terminal Voltage Sensing
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Solution Overview
Problem
Conventional automatic voltage regulators for alternating current generators exacerbate voltage fluctuations due to uneven load distribution and mismatch between output terminals connected to the load and those measured, leading to increased percentage fluctuations in three-phase and single-phase output voltages.
Innovation Solution
A voltage fluctuation suppressing device that includes a processor and memory to detect load currents, identify in-use output terminals, and control excitation based on calculated inter-terminal voltages, allowing for precise regulation of output voltage and minimizing fluctuations by using inter-terminal voltage measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional automatic voltage regulators measure output voltage at fixed terminals, then the voltage control system is simple, but voltage fluctuations increase due to mismatch between measured terminals and loaded terminals
Solution Approach 1:
The patent applies dynamics by making the voltage measurement configuration adaptive rather than fixed. The system dynamically identifies which output terminals are currently connected to loads and adjusts the measurement configuration accordingly. This allows the voltage regulator to always measure at the correct terminals regardless of how the load is connected, resolving the contradiction between measurement simplicity and regulation accuracy.
Solution Approach 2:
The patent implements feedback by detecting the actual connection state of output terminals and using this information to adjust the voltage measurement strategy. The system continuously monitors which terminals are loaded and feeds this information back to the voltage regulation control, ensuring that voltage is always measured at the appropriate terminals to maintain regulation accuracy.
2Reliability
If voltage is controlled based on fixed terminal measurements, then the control system is straightforward, but percentage voltage fluctuations worsen under uneven load distribution
Solution Approach 1:
The system dynamically adapts its measurement and control strategy based on the actual load configuration. By identifying which terminals are currently loaded and adjusting which terminals are used for voltage measurement and control, the system maintains accurate voltage regulation even under uneven load distribution, while keeping the control logic relatively simple through automated terminal identification.
Solution Approach 2:
The voltage regulation system performs self-configuration by automatically detecting which output terminals are connected to loads and adjusting its measurement strategy accordingly. This self-service capability eliminates the need for manual configuration or complex external control, allowing the system to maintain accurate voltage regulation automatically regardless of load distribution.
3Adaptability or versatility
If conventional regulators use fixed measurement points, then device structure is simple, but adaptability to different terminal usage configurations is poor
Solution Approach 1:
The patent makes the voltage measurement system dynamic and adaptive by automatically identifying which output terminals are currently loaded and adjusting the measurement configuration accordingly. This allows the system to adapt to any terminal usage configuration (whether single-phase or three-phase, balanced or unbalanced) without requiring manual reconfiguration or complex hardware changes, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The voltage regulation system is designed to be universal and handle multiple terminal configurations through a single measurement approach. By detecting load currents at all output terminals and automatically identifying which ones are in use, the system can universally apply voltage control regardless of whether the generator is operating in single-phase mode, three-phase mode, or with uneven load distribution, eliminating the need for separate measurement systems for different configurations.
Data Source
AI summary
A voltage fluctuation suppressing device for an alternating current generator provided in the alternating current generator and configured to suppress voltage fluctuation by excitation control based on an output voltage includes a processor, and a memory configured to be able to communicate with the processor. The processor is configured to: detect a load current of each of output terminals; identify in-use output terminals based on the detection of the load current; detect inter-terminal voltages of the output terminals including the identified output terminals; and control excitation by using an output voltage calculated from the detected inter-terminal voltages.