Compact Substation with External Control Panel
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Solution Overview
Problem
In urban contexts, the increasing demand for new electrical transformation substations poses challenges in identifying suitable underground spaces, and accessing existing underground substations for maintenance is hazardous due to confined spaces and requires multiple workers, necessitating a solution that reduces volumetric occupancy and allows for remote operation.
Innovation Solution
A compact electrical transformation substation design featuring a containment box with separate compartments for medium-voltage and low-voltage switchgear, a forced-air cooling system, and an external control panel for remote operation, eliminating the need for internal access and minimizing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional underground substation is built in a masonry technical compartment, then sufficient space is provided for equipment placement and natural cooling, but the volumetric occupancy is large (15-20 m2 plan area) and access requires personnel to enter confined spaces
Solution Approach 1:
The patent replaces the mechanical system of physical access and manual operation with automated remote control systems. The control panel positioned on the external surface allows operators to control switching apparatus and monitor equipment without entering the confined substation space, eliminating the need for mechanical access while maintaining operational capability
Solution Approach 2:
The patent repositions the control interface from inside the substation (requiring vertical descent into confined space) to the external surface (accessible from ground level). This dimensional change allows operators to interact with the system from a safe external position, reducing the volumetric requirements for internal working space while maintaining full operational access
2Ease of operation
If the control panel is positioned inside the substation for direct operation, then operational control is available, but personnel must enter confined underground spaces creating safety risks and requiring multiple workers
Solution Approach 1:
The patent extracts the control panel from the internal confined space and positions it on the external surface of the substation. This separation removes the harmful factor of confined space exposure while maintaining control functionality, allowing single-person operation from a safe external location without requiring personnel to enter the underground compartment
Solution Approach 2:
The control panel acts as an intermediary interface between the operator and the internal equipment. By positioning this intermediary on the external surface, operators can control switching apparatus and monitor systems remotely without direct exposure to confined space hazards, eliminating safety risks while maintaining operational control
3Device complexity
If natural cooling is used for electromagnetic components, then no additional cooling equipment is needed, but sufficient volumetric space is required for air circulation and heat dissipation
Solution Approach 1:
The patent employs forced air circulation (a pneumatic cooling method) through strategically positioned ventilation openings in the containment box walls. This active airflow system provides efficient heat dissipation without requiring large volumetric spaces for natural convection, reducing the cooling volume requirement while maintaining thermal management effectiveness
Solution Approach 2:
The patent changes the cooling parameter from passive natural convection to active forced convection through ventilation openings. This parameter change allows efficient heat dissipation in a compact volume by controlling air flow characteristics, reducing the space requirement for heat dissipation while maintaining effective thermal management with simplified system 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
The solution enables safe and efficient operation of electrical installations with reduced space requirements, allowing for remote control and maintenance without physical entry, enhancing safety and operational flexibility.
Implementation Method 1
a forced-air cooling system
Implementation Method 2
an electrical power transformer configured to convert a medium-voltage power into a low-voltage power
Data Source
AI summary
An electric power transformation substation includes a containment box including first, second and third box compartments. The box compartments define a respective compartment and are arranged adjacent to one another in a longitudinal direction when the substation is in a position of use, the second box compartment being arranged between the first and third box compartment. Medium-voltage switchgear is in the first box compartment. An electrical power transformer in the second box compartment converts a medium-voltage power into low-voltage power. Low-voltage switchgear is in the third box compartment. The containment box includes a box bottom wall which, in the position of use lies on a support surface, a box upper wall, first and second box side walls, and box front and rear walls. The first side wall and the second box side wall laterally delimit the first box compartment and the third box compartment, respectively.