Auxiliary Energy Unit Grid Separation Strategy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current energy installations, such as wind and tidal power systems, face challenges in efficiently and economically covering their intrinsic energy demands during separation from the electric power grid, especially when energy storage units like batteries can only supply energy for a short period, and fuel-operated emergency power units are complex, inefficient, and costly.
Innovation Solution
The method involves connecting energy installations to an energy storage unit, which can be capacitive or battery-based, and using a charging unit to draw electrical energy from the grid or renewable sources like photovoltaic units or wind energy units, allowing for extended operation during grid separation by switching to generator power once storage is depleted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a battery energy storage unit is used to cover intrinsic energy demand during grid separation, then the energy supply duration is limited to approximately one day, but this short period is not acceptable for maintenance or commissioning works
Solution Approach 1:
The system performs preliminary action by charging the battery energy storage unit during grid-connected operation using excess generated energy. This pre-stored energy enables the auxiliary energy unit to operate independently for extended periods during grid separation, making maintenance and commissioning works feasible without external power supply.
2Duration of action of moving object
If a fuel-operated emergency power unit is used to cover intrinsic energy demand during grid separation, then the energy supply duration can be extended, but the fuel supply must always be ensured which is complex, inefficient and costly
Solution Approach 1:
The system implements self-service by using the energy installation's own generated energy to charge the battery storage unit during normal operation. This self-charging mechanism eliminates the need for external fuel supply infrastructure, reducing complexity, improving efficiency, and lowering costs while maintaining extended operational capability during grid separation.
3Use of energy by moving object
If the auxiliary energy unit draws electrical energy from the electric power grid during normal operation, then the intrinsic energy demand is covered efficiently, but in the event of grid separation the auxiliary energy unit can no longer remove electrical energy from the grid
Solution Approach 1:
The system performs preliminary action by accumulating energy in the battery storage unit during grid-connected operation. This pre-stored energy creates a buffer that enables the auxiliary energy unit to maintain efficient operation during grid separation, bridging the transition until the generator can directly supply power to the auxiliary load.
4Ease of manufacture
If the energy storage unit is formed as a battery, then the electrical energy can be drawn for approximately one day, but this short period of time is not acceptable for maintenance or commissioning purposes
Solution Approach 1:
The system merges two energy sources: the battery energy storage unit and the generator. The battery provides immediate power during grid separation, while the generator gradually takes over as it reaches operational speed. This combination extends the effective energy supply period from one day to potentially unlimited duration, making maintenance and commissioning operations feasible while maintaining battery simplicity.
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 method enables energy installations to cover their intrinsic energy demands efficiently and economically over a longer period without relying on costly fuel supplies, by using stored energy and then generator power during grid disconnection, ensuring continuous operation during maintenance or commissioning.
Implementation Method 1
electrically charging the energy storage unit, formed as a capacitive energy store or as a battery
Implementation Method 2
drawing via the charging unit, electrical energy generated by the generator via the converter unit and/or from a photovoltaic unit
Data Source
AI summary
A method is disclosed for operating an energy installation having a wind turbine or water turbine connected to a generator, a converter unit connected on the generator side to the generator, and an auxiliary energy unit for providing electrical energy to cover an intrinsic energy demand of the energy installation. The converter unit is connected to an electric power grid and feeds electrical energy generated by the generator into the electric power grid via the converter unit. The auxiliary energy unit is connected to the electric power grid for drawing electrical energy. In the event of a separation of the converter unit and of the auxiliary energy unit from the electric power grid, the auxiliary energy unit draws electrical energy from an energy storage unit for an adjustable period of time, and the auxiliary energy unit then draws electrical energy generated by the generator via the converter unit.