Wind Turbine Power Routing With Direct Battery Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind power generation systems face instability due to natural fluctuations, leading to excessive energy loss and inefficiency in energy conversion processes, particularly with the use of AC-DC power electronic converters, which generate harmonics and complicate the system structure.
Innovation Solution
A wind power generation apparatus that includes a wind turbine, generator, and an electric power storage unit with a magnetic circuit and annular batteries, where the system adjusts power generation and storage based on wind power thresholds, directly converting mechanical energy into electrolytic energy without DC power supplies, using a rotatable magnetic circuit to induce current in batteries for charging and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If AC-DC power electronic converters are used to convert wind power to DC power for storage, then the power conversion function is achieved, but energy loss increases and harmonics are generated
Solution Approach 1:
The patent extracts and removes the AC-DC power electronic converter from the system. Instead of using conventional rectifiers to convert AC power to DC power for battery charging, the invention directly uses the AC output from the generator to charge the batteries through AC-compatible charging circuits, eliminating the source of harmonics and reducing energy loss associated with multiple conversion stages.
Solution Approach 2:
The patent replaces the mechanical/electronic conversion system (AC-DC converters) with a direct AC charging system. The generator's AC output is directly utilized to charge batteries through AC charging circuits, bypassing the need for rectification and conversion, thereby substituting a complex electronic conversion mechanism with a simpler direct charging approach.
2Reliability
If centralized energy storage devices are provided on the substation side, then grid stability is improved, but the system complexity and cost increase
Solution Approach 1:
The patent segments the energy storage function from the centralized substation level and distributes it to individual wind power units. Each wind turbine is equipped with its own battery storage system, allowing independent operation and control. This segmentation enables each unit to manage its own power fluctuations and provide stability independently, reducing the need for complex centralized control systems.
Solution Approach 2:
The patent implements self-service by enabling each wind power unit to independently manage its own energy storage and power output. The batteries at each unit can autonomously charge during high wind conditions and discharge during low wind conditions, allowing the system to self-regulate without requiring complex centralized control or grid intervention, thereby simplifying the overall system architecture.
3Power
If multiple conversion stages are used from mechanical energy to electrical energy, then power conversion is achieved, but energy loss increases
Solution Approach 1:
The patent ensures continuity of useful action by maintaining a direct, uninterrupted energy conversion path from the generator's mechanical output to electrical energy storage. The AC power from the generator continuously charges the batteries without interruption from intermediate conversion stages, ensuring that energy flows continuously through the system with minimal loss, maximizing the utilization of wind energy throughout varying wind conditions.
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 simplifies the energy conversion process, reduces energy loss, and stabilizes power output by directly converting wind energy into electrical energy, effectively balancing power supply during peak and valley periods.
Implementation Method 1
a wind turbine, a generator, and an electric power storage unit with a magnetic circuit and annular batteries
Implementation Method 2
the wind turbine only drives the generator to generate power
Implementation Method 3
driving relative rotation between the magnetic circuit and the battery by the wind turbine to form a rotating magnetic field applied to the battery, and generating an induced current under the rotating magnetic field by the battery for charging the electric power storage unit
Data Source
AI summary
The wind power generation apparatus has an acquisition unit, a wind turbine, a generator, an electric power storage unit and a controller. The acquisition unit acquires a wind power value. The controller selects, according to the wind power value, the wind turbine to perform the following tasks: when the wind power value is between a first threshold value and a second threshold value, the wind turbine only drives the generator to generate power; when the wind power value is greater than the second threshold value, the wind turbine simultaneously drives the generator and the electric power storage unit to charge; when the wind power value is less than the first threshold value, the wind turbine only drives the electric power storage unit to charge or drives the electric power storage unit to output induced electric energy to the outside.