Series-Connected Wind Power Converter Layout for Shorter DC Bus Runs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The inefficiency of wind power converter systems due to long-distance direct current (DC) bus transmission, which increases energy transmission costs and reduces overall converter efficiency, especially when the distance between the motor and generator is significant.
Innovation Solution
A wind power converter device design that includes grid side converters and generator side converters connected in series, with a DC bus module coupling them, allowing for flexible voltage adjustment and reducing the number of DC buses, thereby lowering transmission costs and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple converters are used to increase system capacity, then the converter system can handle larger power loads, but the number of DC buses increases and transmission distance extends, leading to higher energy transmission costs and reduced efficiency
Solution Approach 1:
The patent combines multiple converter systems into a single integrated converter station, allowing multiple converters to share common DC buses and control systems. This merging approach enables the system to handle large power loads while avoiding the need for separate DC transmission paths for each converter, thereby reducing total transmission distance and energy losses.
Solution Approach 2:
The patent designs a universal converter station structure where a single DC bus system serves multiple converters simultaneously. The DC buses are configured to accommodate various converter modules, enabling the same transmission infrastructure to support different power capacities and configurations without requiring dedicated transmission paths for each converter.
2Power
If multiple converters are used to increase system capacity, then the converter system can handle larger power loads, but the distance between converters increases, requiring longer DC buses and reducing overall converter efficiency
Solution Approach 1:
By merging multiple converters into a single station with shared DC buses, the patent reduces the effective transmission distance between power conversion points. The compact integrated design allows converters to be closely positioned around common DC busbars, minimizing the length of transmission paths and reducing resistive losses that would otherwise accumulate over longer distances.
Solution Approach 2:
The patent transitions from a linear arrangement of separate converter stations to a multi-dimensional integrated station layout. Instead of extending DC buses over long linear distances between distant converters, the design uses a compact three-dimensional configuration where multiple converters connect to shared DC buses within a confined space, effectively reducing transmission distance through spatial optimization.
3Length of stationary object
If multiple DC buses are used to connect converters, then the system can transmit voltage over long distances, but the complexity of the transmission system increases and transmission costs rise
Solution Approach 1:
The patent merges multiple DC bus systems into a single integrated DC bus structure that serves all converters within the station. Instead of maintaining separate DC buses for each converter that would extend over long distances, the design consolidates these into shared busbars that locally connect to multiple converters, thereby reducing both the number of transmission paths and the overall system complexity.
Data Source
AI summary
A wind power converter device is provided. The wind power converter device includes grid side converters, generator side converters and a DC bus module. Each of the grid side converters includes grid side outputs electrically coupled to a grid and a first and a second DC inputs. Each two of the neighboring grid side converters are connected in series at the second and the first DC inputs. Each of the generator side converters includes generator side inputs electrically coupled to a generator device and a first and a second DC outputs. Each two of the neighboring generator side converters are coupled in series at the second and the first DC outputs. The DC bus module is electrically coupled between the grid side converters and the generator side converters.