Wind Turbine Parallel Power Transmission for Fault Isolation
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Solution Overview
Problem
In current wind turbine systems, a failure of a functional unit due to integral series connection and single main line control affects the entire power transmission system, reducing energy production.
Innovation Solution
Implementing at least two power transmission systems connected in parallel with independent functional units, each equipped with a control system that includes an upper controller and bottom controllers to monitor and control operational states, allowing independent operation of non-faulty systems when a failure occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single main line control system is used to control all functional units, then the control structure is simple and easy to implement, but when a functional unit fails, the entire power generation circuit is affected and cannot operate independently
Solution Approach 1:
The patent divides the single main line control system into multiple independent control subsystems, each responsible for controlling a specific power transmission system. This segmentation allows each control subsystem to operate independently, so that when one functional unit fails, only the corresponding control subsystem is affected while other control subsystems continue to function normally, thus improving system reliability without significantly increasing control structure complexity
2Ease of manufacture
If functional units are connected in integral series, then the power transmission path is straightforward, but a failure in one unit affects the entire power generation circuit
Solution Approach 1:
The patent segments the integral series connection into multiple parallel power transmission systems, where each system contains its own complete set of functional units. This allows the power transmission structure to maintain simplicity within each segment while enabling independent operation of each parallel system, so that when one system fails, other systems can continue to generate energy, thereby improving overall energy production
Solution Approach 2:
The patent changes the topological parameter of the power transmission structure from series connection to parallel connection. This parameter change transforms the system from a single-point-failure mode to a redundant operation mode, where the failure of one functional unit does not propagate to the entire circuit, thus maintaining energy production capability
3Ease of operation
If the entire power generation circuit is controlled as one unit, then the control logic is simple, but the system cannot make full use of the wind turbine generator when a failure occurs
Solution Approach 1:
The patent segments the unified control logic into multiple independent control subsystems, each with its own control logic for a specific power transmission system. This segmentation enables the control system to independently manage each power transmission system, so that when one system fails, the control logic can redirect power flow through other healthy systems, preventing energy loss and maximizing energy production
Data Source
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AI summary
A wind turbine, comprising: at least two sets of power transmission systems, the power transmission systems being connected in parallel to each other; and a control system (2) comprising an upper-level controller (22) and control subsystems provided corresponding to each set of power transmission systems. Each set of control subsystems comprises a bottom-level controller (21). The bottom-level controller (21) is used for monitoring operating state parameters of functional units in corresponding power transmission systems, and sending the operating state parameters of the corresponding functional units to the upper-level controller (22) if it is determined that the corresponding functional units meet abnormal conditions according to the operating state parameters. The upper-level controller (22) is used for generating an operating instruction if it is determined that failures occur in the corresponding functional units according to the operating state parameters of the corresponding functional units, and controlling the power transmission systems to operate according to the operating instruction. The wind turbine is fully utilized, and the generating capacity of the wind turbine is thus improved. Also disclosed is a control method for a wind turbine.