Offshore Switchgear Pressure Relief via Discharge Chamber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium-voltage switchgear in offshore wind turbines faces challenges in pressure relief, as accidental arcs generate toxic gases that can harm personnel and damage the structure, with current solutions either risking internal contamination or weakening the outer shell through pressure relief ducts.
Innovation Solution
A wind turbine design with a separate discharge chamber and pressure relief device located in the foundation, diverting excess pressure and gases away from the tower interior, eliminating the need for external pressure relief ducts and preventing structural weakening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure relief is performed through the tower interior, then excess pressure can be relieved, but toxic gases and decomposition products contaminate the tower interior and endanger personnel
Solution Approach 1:
The patent divides the tower interior into two separate spaces: a switchgear room containing the medium-voltage switchgear and a discharge chamber accessible only through an outer wall opening. The partition wall with sealed opening prevents toxic gases from contaminating the switchgear room while allowing pressure relief to occur in the discharge chamber, thus resolving the contradiction between pressure relief capability and toxic gas contamination protection
Solution Approach 2:
The patent introduces a partition wall with a sealed opening as an intermediary barrier between the switchgear room and the discharge chamber. This partition wall allows pressure equalization while preventing the passage of toxic gases, thereby enabling pressure relief without contaminating the personnel workspace
2Reliability
If pressure relief ducts are installed through the outer wall, then pressure can be relieved externally, but the structural strength of the tower is weakened
Solution Approach 1:
The patent merges the pressure relief function with the existing outer wall structure by creating a controlled opening directly in the outer wall that leads into the discharge chamber. This eliminates the need for separate pressure relief ducts penetrating through the tower structure, thereby maintaining outer wall structural strength while achieving effective pressure relief through the integrated discharge chamber design
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
Effectively manages pressure relief by containing toxic gases outside the tower, ensuring safety and structural integrity, reducing the need for protective measures and maintenance efforts while preventing corrosion from aggressive sea climates.
Implementation Method 1
a pressure relief device which is connected between the interior of the housing and the discharge chamber in order to withstand a pressure difference between the interior of the housing of the switchgear and the discharge chamber
Implementation Method 2
the switchgear is provided with a device to extinguish an arc caused by switching the electric current
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a wind turbine (1) for providing electrical energy, comprising: a tower (3) having a turret (17); switchgear (7), in particular medium-voltage switchgear, for switching an electric current, wherein the switchgear (7) is arranged in a housing in the turret (17); a discharge chamber (16) separate from the turret (17); and a pressure-relief device (9), which is connected between the interior of the housing and the discharge chamber (16), in order to relieve pressure when there is a pressure difference between the interior of the housing of the switchgear (7) and the discharge chamber (16), so that an overpressure in the discharge chamber (16) can be dissipated.