Multi-Engine Generator Starting Control Strategy
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Solution Overview
Problem
Existing power systems with multiple generator units face inefficiencies in starting engines due to insufficient compressed air in air start systems and increased wear from electric start systems, with no automatic coordination between the two.
Innovation Solution
A control strategy and system that measures compressed air pressure to automatically switch between air and electric starters, using compressed air to start engines when pressure is sufficient and electric power when it is not, to ensure reliable and efficient engine starting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air start system is used to start the engine, then wear on the electric power source and starter motor is reduced, but the system becomes ineffective when the amount of compressed air is insufficient
Solution Approach 1:
The power module is designed with dual starting capabilities (air start and electric start), allowing it to adapt to different operating conditions. The control module automatically selects the appropriate starting method based on compressed air availability, ensuring the system can start the engine under various circumstances without manual intervention.
Solution Approach 2:
The control module dynamically adjusts the starting method based on real-time compressed air pressure levels. When compressed air pressure is sufficient, the system uses air starting; when pressure is insufficient, it automatically switches to electric starting. This dynamic adaptation ensures reliable engine starting regardless of compressed air availability.
2Reliability
If an electric start system is used to start the engine, then the system is effective regardless of compressed air availability, but wear on the electric power source and starter motor increases
Solution Approach 1:
The control module monitors compressed air pressure levels and automatically selects the appropriate starting method without external intervention. When compressed air is sufficient, the system uses air starting to preserve the electric power source and starter motor. This self-service approach minimizes wear on electric components while ensuring reliable starting.
Solution Approach 2:
The control module changes the operating parameter (starting method) based on compressed air pressure levels. By monitoring pressure as a key parameter, the system switches between air starting and electric starting modes, optimizing component life while maintaining starting reliability.
3Productivity
If a control system automatically coordinates the choice between electric or air start is implemented, then starting efficiency is optimized, but device complexity increases
Solution Approach 1:
The control module continuously monitors compressed air pressure levels and uses this feedback to automatically select the appropriate starting method. This feedback mechanism enables the system to optimize starting efficiency by choosing the most appropriate starting mode based on real-time conditions, without requiring complex manual control systems.
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
The system effectively starts engines by prioritizing air starters to conserve electric power and reduce wear, while ensuring engines can be started even when compressed air is insufficient, thereby optimizing power system operation.
Implementation Method 1
using the compressed air to turn a compressed air-powered starter motor to start the engine
Implementation Method 2
using electric power to turn an electric-powered starter motor to start the engine
Data Source
AI summary
A control system and strategy for starting power systems having a plurality of power modules. For example, a multi-engine generator set switcher locomotive has three power modules each of which have an engine associated therewith. Upon receiving a command from the locomotive indicating to the engine control module to start at least one power module, i.e., engine, the control strategy determines whether to start the engine with an air or electric start. The control strategy starts only a single engine at a time, thereby avoiding overloading the airflow capacity of the compressed air source or the electric power capacity of the electric source. The control strategy also implements a command to start every engine with an air starter, if possible, to preserve the electric starter motor and the electric power capacity of the electric source.