Offshore Wind Compressed Air Storage Layout for Lower Transmission Cost
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Solution Overview
Problem
Offshore wind turbines with compressed air energy storage systems have high construction costs and low energy capacity due to dispersed arrangements and reliance on onshore land, leading to increased power transmission and distribution costs.
Innovation Solution
An offshore wind turbine generator set with integrated air compressor and expander sets, a three-in-one motor, and combined air storage devices, where the air compressor and expander are coaxially connected, and air storage devices are integrated within and outside the wind turbine compartment, allowing direct coupling and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wind turbine generator set is indirectly coupled to a compressed air energy storage system with dispersed arrangement, then the system can store and release energy to adjust peak and valley load, but the construction costs increase and the arrangement occupies large space
Solution Approach 1:
The patent merges the compressed air energy storage system with the wind turbine generator set by integrating the air compressor and air expander directly into the generator compartment. This consolidation eliminates the need for dispersed arrangement and long power transmission lines, reducing both construction costs and spatial occupation while maintaining energy storage functionality
Solution Approach 2:
The wind turbine generator compartment serves multiple functions: it houses the wind turbine generator set, the air compressor for energy storage, and the air expander for energy release. This multi-functional design eliminates the need for separate dedicated spaces for each component, thereby reducing overall system complexity and construction costs
2Quantity of substance
If air storage devices are arranged on onshore land, then the energy storage capacity can be achieved, but the land occupation cost increases and power transmission distances increase
Solution Approach 1:
The patent transitions from onshore land-based air storage to offshore water-based air storage. The air storage device is positioned in the sea, utilizing the three-dimensional space underwater, which eliminates the need for expensive onshore land and significantly reduces power transmission distances to coastal load centers
3Adaptability or versatility
If the air compressor set and air expander set are separately arranged, then the system can perform compression and expansion functions, but the space occupation increases and construction costs increase
Solution Approach 1:
The patent nests the air compressor and air expander within the same wind turbine generator compartment, with the air compressor positioned in the upper part and the air expander in the lower part of the compartment. This nested arrangement allows both compression and expansion functions to coexist in a compact space, eliminating the need for separate dedicated spaces and reducing overall construction costs
Data Source
AI summary
Provided is an offshore wind turbine generator set having a compressed energy storage system. The set includes, a wind turbine generator set, an air compressor set, an air expander set, a first motor generator, a three-in-one motor, and a combined air storage device, in which the first motor generator is alternatively connected to the wind turbine generator set or the air compressor set, the air compressor set is coaxially connected to the air expander set by means of a three-in-one motor, the combined air storage device includes a first air storage device provided in a tower barrel and a second air storage device provided on the sea, an input end of the combined air storage device is connected to the air compressor set, and an output end of the combined air storage device is connected to the air expander set.