Generator Set Harmonic Synchronization for Weak Network Stability
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Solution Overview
Problem
In weak power distribution networks, such as those on ships or in industrial plants, the malfunction of a single generator set significantly affects the entire network due to power fluctuations, leading to decreased efficiency and unnecessary reactions.
Innovation Solution
The method involves synchronizing the lowest harmonic waves of rotational features of generator sets by measuring and adjusting their crank angle phases to a global reference, using generator-specific control units to calculate and align phase differences, and adjusting actuators to maintain stable power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If generator sets are connected to a weak power distribution network, then the network can operate with limited infrastructure, but power fluctuations occur and decrease system efficiency
Solution Approach 1:
The control system continuously monitors the rotational feature of each engine and uses feedback control to adjust actuator means, maintaining synchronized harmonic waves and stabilizing total power output despite network weaknesses
Solution Approach 2:
The system adjusts operational parameters of generator sets, specifically synchronizing crank angle phases and harmonic wave frequencies, to optimize power distribution stability in weak networks
2Productivity
If total power of generator sets is controlled to match power consumption, then power production efficiency is improved, but power fluctuations still occur in weak networks
Solution Approach 1:
The system uses vibration analysis by measuring rotational features and analyzing harmonic waves to detect and correct phase misalignments, thereby stabilizing total power output
Solution Approach 2:
The control system proactively adjusts crank angle phases and harmonic wave synchronization before significant power fluctuations occur, preventing instability rather than merely reacting to it
3Stability of the object's composition
If crank angle phases are synchronized to reduce power fluctuations, then power distribution stability is improved, but control system complexity increases
Solution Approach 1:
The control system introduces a global phase coordinate system as an intermediary reference frame to simplify the synchronization of multiple engines, making the control process more manageable despite increased overall system complexity
Data Source
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AI summary
The goal of the invention is to transform the fluctuation of the total power o the generator sets. In the invention the lowest harmonic waves of rotational feature of the engines of the generator sets are adjusted to be in the same phase. The adjustment of the lowest harmonic wave is an adequate action in mos cases, but the next lowest harmonic wave may also be adjusted in addition if needed. The upper harmonic waves can also be adjusted, but it increases the complexity of the adjustment system and has no significant effect in most cases.