HVDC Transformer and Bushing Layout for Smaller Converter Buildings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing HVDC power transmission systems face challenges in optimizing the electrical connections and physical arrangements of transformers and bushings, leading to increased cost, size, and maintenance complexity due to the need for converters at each AC-DC interface.
Innovation Solution
An assembly comprising a building for housing electrical components, a charging circuit, and a grounding circuit, with transformers and bushings positioned outside the building, allowing for optimized electrical connections and reduced footprint, and incorporating a charging circuit with bypass switching elements to manage inrush currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transformers and bushings are positioned inside the building, then electrical connections are simplified, but the building size, cost, and HVAC losses increase
Solution Approach 1:
The patent extracts the transformers and bushings from the building interior and positions them outside. This separation reduces the building footprint and associated costs while maintaining all necessary electrical connection functions through optimized external positioning and connection arrangements.
2Area of stationary object
If transformers and bushings are positioned outside the building, then building size and cost are reduced, but electrical connection complexity increases
Solution Approach 1:
The patent resolves the connection complexity by transitioning from a three-dimensional interior arrangement to a two-dimensional external arrangement on the building facade. The bushings extend through the building wall, creating an optimized external connection interface that simplifies the overall electrical architecture while reducing building footprint.
3Device complexity
If neutral bushings extend into the building, then electrical connections are simplified, but maintenance complexity and electrical noise increase
Solution Approach 1:
The patent extracts the neutral bushings from the building interior and positions them outside, similar to the transformers. This separation improves maintenance accessibility and reduces electrical noise within the building while maintaining simplified electrical connections through the extended bushing configuration.
4Device complexity
If charging circuit and grounding circuit are positioned inside the building, then electrical connections are simplified, but building cost and electrical noise increase
Solution Approach 1:
The patent extracts the charging circuit and grounding circuit from the building interior and positions them outside. This separation reduces electrical noise within the building environment while maintaining simplified electrical connections through optimized external circuit arrangements.
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
This configuration reduces the overall cost, size, and maintenance requirements while minimizing HVAC losses and electrical noise, enabling simpler maintenance and design flexibility, and reducing the need for additional space and materials.
Implementation Method 1
The charging circuit may include a bypass switching element and a resistive element, the bypass switching element switchable to selectively permit electrical bypass of the corresponding resistive element.
Implementation Method 2
the or each transformer including mutually coupled first and second transformer windings, the or each first transformer winding for electrical connection to an AC network, the or each second transformer winding for electrical connection to the electrical power transmission component
Implementation Method 3
a grounding circuit for electrical connection to ground
Data Source
AI summary
There is provided an assembly for use in electrical power transmission. The assembly includes a building for housing an electrical power transmission component, a charging circuit, a grounding circuit for electrical connection to ground, and at least one transformer located outside the building. The or each transformer including mutually coupled first and second transformer windings, the or each first transformer winding for electrical connection to an AC network, the or each second transformer winding for electrical connection to the electrical power transmission component, the or each transformer further including phase and neutral bushings electrically connected to respective terminals of the corresponding second transformer winding, the or each phase bushing extending into the building for electrical connection to the electrical power transmission component, the charging circuit electrically interconnecting the or each neutral bushing and the grounding circuit.