Generator Synchronization Using Ignition Timing for Phase Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for synchronizing generators with power supply grids are inefficient, leading to high synchronization times and increased emissions due to unburnt fuel-air mixtures and misfires, which can cause noise pollution and damage.
Innovation Solution
The method involves temporarily adjusting the ignition timing of the internal combustion engine's cylinder units to rapidly change the phase angle difference between the generator and the grid, allowing for quick synchronization without altering the generator's rotary speed, thus minimizing emissions and achieving fast grid connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the generator speed is increased or reduced to match the current frequency and then waited for phase angle alignment, then the generator can be synchronized with the power supply grid, but the synchronization time becomes relatively high
Solution Approach 1:
The patent changes the ignition timing parameter of the internal combustion engine to directly adjust the phase angle of the generator output. By advancing or retarding the ignition timing, the phase angle of the generated voltage changes, enabling rapid synchronization with the power grid without requiring speed adjustments or waiting for natural phase alignment. This transforms the synchronization control from a time-consuming mechanical process to a fast electrical control mechanism.
2Loss of time
If the fuel feed or ignition is deliberately skipped for certain cylinder units to reduce synchronization time, then the synchronization time can be reduced, but high levels of methane emission are emitted to the atmosphere in an unburnt state
Solution Approach 1:
Instead of skipping ignition or fuel feed, the patent adjusts the ignition timing parameter to achieve phase angle control. By modifying when ignition occurs in each cylinder cycle, the phase of the generated voltage is shifted to match the grid frequency and phase requirements. This ensures complete combustion of the fuel-air mixture in all cylinders, eliminating unburnt methane emissions while still achieving rapid synchronization.
3Loss of time
If the fuel feed or ignition is deliberately skipped for certain cylinder units, then the synchronization time can be reduced, but low speed detonation can result in considerable noise pollution and damage
Solution Approach 1:
The patent uses ignition timing adjustment to control phase angle, ensuring that ignition occurs at the optimal point in each cylinder cycle. This prevents skip-fire conditions that cause unburnt mixtures to enter the exhaust system and undergo low-speed detonation. By maintaining proper ignition timing across all cylinders, the method avoids noise pollution and potential engine damage while achieving fast synchronization through electrical phase control rather than mechanical disruption.
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 enables rapid and precise synchronization of generators with the power supply grid, reducing synchronization time and emissions, while ensuring complete combustion of fuel-air mixtures, thereby stabilizing the grid and preventing power fluctuations from alternative energy sources.
Implementation Method 1
an internal combustion engine for driving a generator
Implementation Method 2
creating a generator rotary speed corresponding to a generator frequency generated by the generator
Data Source
AI summary
A method including:mechanically driving a generator with an internal combustion engine, creating a generator rotary speed corresponding to a generator frequency,control of the internal combustion engine such that the generator frequency is in a tolerance range, wherein a grid frequency is within the tolerance range,detecting a phase angle difference between a current and/or a voltage generated by the generator and a grid current and/or a grid voltage,synchronizing the voltage and/or the current with the grid voltage and/or the grid current to reduce as phase angle difference (Δφ), andelectrically connecting the generator to a power supply grid,wherein at least one temporary change in an ignition timing of at least one cylinder unit of the internal combustion engine is performed to reduce the phase angle difference (Δφ).