Predictive Load Signal AVR for Genset Voltage Stability
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Solution Overview
Problem
Generator sets (gensets) face challenges in regulating transient deviations in output voltage due to load changes, leading to inefficient transient performance, particularly in critical applications where voltage stability is paramount.
Innovation Solution
An automatic voltage regulator (AVR) system that utilizes predictive load signals to proactively adjust the excitation current of the alternator before detecting significant voltage deviations, using stored tables of output voltage deviation values and load change values to determine necessary adjustments within a predefined interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automatic voltage regulator waits to detect voltage deviation before adjusting excitation current, then the control system remains simple and responsive, but transient voltage deviations exceed acceptable levels
Solution Approach 1:
The automatic voltage regulator receives and processes predictive load signals before the actual load change occurs. By analyzing the anticipated load change and pre-adjusting the excitation current accordingly, the system proactively compensates for upcoming voltage deviations rather than reacting after detection, thus maintaining voltage stability without excessive transient deviations
Solution Approach 2:
The system uses predictive load signals as feedforward feedback to anticipate load changes. The AVR compares the predictive signal with stored tables of output voltage deviation values and predetermined load change values to determine the appropriate excitation current adjustment, creating a closed-loop predictive control mechanism that improves transient response
2Reliability
If the automatic voltage regulator adjusts excitation current proactively based on predictive load signals, then transient voltage deviations are reduced, but the device complexity increases
Solution Approach 1:
The system stores tables of output voltage deviation values and predetermined load change values in advance. When a predictive load signal is received, the AVR quickly queries these pre-prepared tables to determine the appropriate excitation current adjustment, avoiding complex real-time calculations and keeping the control logic simple while achieving improved transient performance
Solution Approach 2:
The predictive load signal acts as an intermediary that carries information about anticipated load changes from the load to the AVR. This intermediate signal allows the system to prepare for voltage deviations before they occur, enabling proactive control without requiring direct measurement of voltage changes
3Reliability
If the automatic voltage regulator uses predictive load signals to pre-adjust excitation current, then voltage stability is improved, but the loss of time in processing and adjusting increases
Solution Approach 1:
The tables of output voltage deviation values and predetermined load change values are prepared and stored in advance. When a predictive load signal arrives, the AVR performs a simple table lookup and comparison operation rather than complex real-time analysis, significantly reducing the processing time required to determine the excitation current adjustment while maintaining accurate voltage regulation
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 reduces transient voltage deviations by up to 20% of the nominal voltage, enhancing the genset's transient performance and ensuring stable electrical characteristics under variable loads.
Implementation Method 1
The generator can convert the mechanical energy into useable electrical energy at a line voltage and frequency suitable for transmission and utilization
Data Source
AI summary
Systems and methods for regulating transient deviations in an output voltage of a power generator system are provided. An automatic voltage regulator (AVR) may receive a predictive load signal from a load. The predictive load signal may relate to an anticipated change in the load. The predictive load signal can be configured to include information of the anticipated change in the load. The AVR may extract the information of the anticipated change in the load from the predictive load signal, responsive to receiving the predictive load signal. The AVR may analyze the extracted information to determine whether the anticipated change causes a transient deviation above a predetermined level in the output voltage. The AVR may adjust an excitation current of an alternator prior to detecting a difference between a voltage setpoint and the output voltage, responsive to determining that the anticipated change in the load causes the transient deviation.