Wind Power Inverter Voltage Control via Armature Short-Circuiting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of wind power generation systems with commercial power sources is hindered by the need for dedicated inverters, which causes delays and reduces compatibility with solar power generators due to differing rated voltages.
Innovation Solution
A wind power generation apparatus that includes a generator with a magnet and armature winding, switch means for controlling rotational speed, shunt means for regulating output voltage, and control means to maintain constant voltage for general-purpose inverters, allowing intersystem connection with commercial power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated inverters are used for wind power generation, then the system can operate reliably, but compatibility with solar power generators is reduced and market release is delayed
Solution Approach 1:
The patent applies universality by designing a dedicated inverter that can handle multiple power generation types (wind and solar) through a unified control system. The inverter is equipped with a control unit that can detect the type of power generator connected and automatically adjust its operation mode, allowing the same inverter hardware to serve both wind power generators with different rated voltages and solar power generators, thereby improving compatibility while maintaining reliable operation
2Reliability
If dedicated inverters are developed for each power generation method, then system performance is optimized, but time to market is increased
Solution Approach 1:
The patent resolves the time-to-market issue by creating a universal inverter platform that can be deployed for both wind and solar power generation applications. This eliminates the need to develop and certify separate inverter models for each power generation type, allowing faster market release while maintaining optimized performance through software-based control adaptation
3Adaptability or versatility
If wind power generators with different rated voltages are connected to the same inverter, then compatibility is improved, but voltage control complexity increases
Solution Approach 1:
The patent manages voltage control complexity by implementing a control unit that dynamically adjusts operating parameters based on the detected generator type and rated voltage. The control system modifies voltage regulation settings, switching patterns, and protection thresholds according to the specific generator configuration, allowing the same inverter hardware to accommodate different voltages without requiring complex hardware modifications for each voltage level
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
Enables the use of general-purpose inverters in wind power generation systems, maintaining constant voltage and rotational speed, thereby facilitating intersystem connection and improving compatibility with commercial power sources.
Implementation Method 1
a generator (2) composed of a magnet (21) and an armature winding (22) and having a windmill rotating blade (20)
Implementation Method 2
switch means for controlling the rotational speed of the windmill rotating blade by short-circuiting the armature winding at a controlled duty cycles
Data Source
AI summary
Provided is a wind power generation apparatus to which general purpose inverters are applicable. An inverter in a constant-voltage mode is used. While a wind power generator is generating electricity, switching circuits are turned on and off at a controlled duty cycles to intermittently short-circuit an armature winding, boosting the voltage and controlling the rotational speed of a windmill rotating blade, with the result that the voltage applied to the inverter is made constant. At the activation, in order to prevent an excessive voltage from being generated while an inverter is changing from the stand-by state to the activated state, ON/OFF control of a switching circuit is performed to switch between the output voltage of a rectifier and the voltage generated at a resistor, with the result that the voltage is controlled and maintained at an appropriate value.