Generator Control Module Harmonic Correction via Local Feedback
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Solution Overview
Problem
Traditional generator systems are unable to control generator harmonics and can only regulate output voltage at the fundamental frequency, lacking effective methods for voltage regulation and harmonic mitigation at externally connected points of reference.
Innovation Solution
A generator system with a control module that receives local and point of reference feedback to control the inverter, providing protection, voltage regulation, and harmonic correction by converting feedback into RMS values and comparing them to references, and using modules for harmonic removal and voltage drop adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If traditional generator systems regulate output voltage directly at the POR, then voltage regulation is simple, but harmonics cannot be controlled or mitigated
Solution Approach 1:
The patent introduces an intermediary control system between the generator and the POR that processes feedback signals and generates corrected output. The controller acts as a mediator that receives POR feedback, processes it through RMS conversion and harmonic analysis, and generates corrected PWM signals to eliminate harmonics while maintaining voltage regulation.
Solution Approach 2:
The patent implements a feedback mechanism where the controller monitors the output at the POR, converts the feedback to RMS values, compares it with reference values, and adjusts the inverter output accordingly. This closed-loop feedback system enables both voltage regulation and harmonic mitigation by continuously correcting the output based on measured conditions.
2Manufacturing precision
If generator output voltage is regulated only at fundamental frequency, then the system is simple, but voltage drops and harmonics are not corrected
Solution Approach 1:
The controller performs preliminary RMS conversion of the feedback voltage before comparison with reference values. By pre-processing the feedback signal through rectification and RMS calculation, the system prepares the data in advance for accurate comparison and correction, enabling precise voltage regulation at the POR.
Solution Approach 2:
The patent implements dynamic control by continuously adjusting the inverter output based on real-time feedback comparison. The PWM duty cycle is dynamically modified according to the difference between measured RMS voltage and reference RMS voltage, enabling adaptive voltage regulation that responds to changing load conditions and compensates for voltage drops.
3Reliability
If no local feedback is used, then the system is simpler, but protection against overvoltage and overcurrent is limited
Solution Approach 1:
The controller performs preliminary RMS conversion of the feedback voltage before comparison with reference values. By pre-processing the feedback signal through rectification and RMS calculation, the system prepares the data in advance for accurate comparison and correction, enabling precise voltage regulation.
Solution Approach 2:
The patent implements a feedback mechanism where the controller monitors the output at the POR, converts the feedback to RMS values, compares it with reference values, and adjusts the inverter output accordingly. This closed-loop feedback system enables both voltage regulation and harmonic mitigation.
Data Source
AI summary
A generator system can include a generator configured to produce an output of alternating current (AC), a rectifier connected to the generator to rectify the AC into direct current (DC) rectifier output, an inverter connected to the rectifier to receive the DC rectifier output and configured to output three phase AC inverter output, and a plurality of output lines connected to the inverter to receive the three phase AC inverter output. The system can include a control module configured to control the output of the inverter. The control module can be operatively connected to one or more of the output lines via one or more local sense leads to receive a local feedback. The control module can be configured to control the inverter as a function of the local feedback to provide one or more of protection, voltage regulation, or harmonic correction.