Series Inductor Coil Layout for High-Voltage Load Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-voltage network reactive power compensation apparatuses can only be connected in parallel to phase conductors, limiting their configuration and increasing costs due to high-voltage insulation requirements.
Innovation Solution
A second high-voltage connection is provided for serial connection to the phase conductor, with saturation switching branches mounted outside the tank and insulated from ground potential, allowing for more cost-effective medium-voltage component usage and a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the apparatus is connected in parallel to the phase conductor, then the high-voltage insulation is simplified, but the configuration flexibility is limited and costs increase
Solution Approach 1:
The apparatus is divided into two separate high-voltage connections (first and second high-voltage connections), each capable of independent connection to phase conductors. This segmentation enables the apparatus to be configured in series or parallel depending on the connection arrangement, providing configuration flexibility while distributing the insulation requirements across separate connection points.
Solution Approach 2:
The apparatus is designed with universal connection capability through providing both first and second high-voltage connections that can be configured in different connection topologies (series or parallel). The same apparatus structure serves multiple connection purposes, eliminating the need for different designs for series versus parallel applications.
2Ease of manufacture
If saturation switching branches are mounted inside the tank, then the structure is compact, but the insulation complexity and cost increase due to high-voltage requirements
Solution Approach 1:
The saturation switching branches are extracted from the tank interior and mounted outside the tank on support structures. This extraction removes the high-voltage insulation requirement from the tank environment, allowing the use of medium-voltage rated components for the switching branches while maintaining the tank's simple insulation design. The switching branches operate at elevated potential but are physically separated from the grounded tank.
Solution Approach 2:
The saturation switching branches are positioned in a different spatial dimension (outside the tank) rather than inside it. This dimensional relocation allows the switching branches to be insulated from ground potential through their mounting structure rather than requiring the tank to provide high-voltage insulation, thereby reducing overall insulation complexity and cost.
3Ease of manufacture
If medium-voltage components are used for saturation switching branches, then costs are reduced, but the insulation arrangement becomes more complex
Solution Approach 1:
Support structures serve as intermediary elements between the grounded tank and the elevated-potential saturation switching branches. These support structures provide the necessary insulation, allowing medium-voltage components to be used for the switching branches while maintaining electrical isolation from ground potential. The intermediary support structures simplify the overall insulation arrangement compared to requiring high-voltage insulation throughout the entire apparatus.
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
Enables serial connection of the apparatus in high-voltage networks, reducing costs and complexity by using medium-voltage components and insulating fluids for both insulation and cooling, resulting in a more compact and efficient reactive power compensation system.
Implementation Method 1
The previously known apparatus has two high-voltage windings for each phase which are connected in parallel with one another and each surround a core limb of a closed iron core... The converter is configured to generate a direct current in the high-voltage winding connected to it. In this case, the direct current is set in such a manner that the core limb surrounded by the winding is driven into a desired saturation state. In this saturation state, the core material has a very low magnetic permeability, for example, as a result of which the magnetic resistance of the winding is increased and its inductance is reduced.
Implementation Method 2
a first tank which is filled with an insulating fluid... each saturation switching branch is arranged outside the tank and is mounted such that it is electrically insulated from ground potential
Implementation Method 3
a first tank which is filled with an insulating fluid... The liquid or gaseous insulating fluid is used for insulation and cooling
Implementation Method 4
a first high-voltage winding which surrounds the first core section and a second high-voltage winding which surrounds the second core section... an alternating current flowing via the windings
Data Source
AI summary
An apparatus for dynamic load flow control in high-voltage networks has at least one phase conductor and first high-voltage connection for connection to each phase conductor. Each first high-voltage connection has first and second core sections of a closed magnetic circuit and first and second high-voltage windings surrounding respective core portions and connected in parallel. The core portions and windings are in a tank filled with ester fluids. At least one saturation switching branch outside the tank saturates the core sections and has controllable power semiconductor switches. A control unit controls the power semiconductor switches. The first and second high-voltage windings are connected at high-voltage ends to associated first high-voltage connections and at low-voltage ends to respective saturation switching branches. The device is connectable in series into the high-voltage network, with the saturation switching branches electrically insulated from ground potential.