Magnetically Controllable Shunt Reactor With Capacitive Auxiliary Windings
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Solution Overview
Problem
Existing reactive power compensation devices in high-voltage networks are limited to providing inductive reactive power and cannot supply capacitive reactive power when needed.
Innovation Solution
The integration of additional windings inductively coupled to high-voltage windings, connected to capacitive components such as capacitors or FACTS devices, allowing for capacitive reactive power compensation through a control unit that manages power semiconductor switches to adjust the reactive power compensation effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional windings connected to capacitive components are integrated into the device, then the ability to provide capacitive reactive power compensation is improved, but the device complexity increases
Solution Approach 1:
The patent combines inductive high-voltage windings and capacitive auxiliary windings into a single integrated device structure. Both winding types share common magnetic core sections and are connected to the same high-voltage network, merging two separate reactive power compensation technologies (inductive reactors and capacitive compensators) into one unified system that can provide both inductive and capacitive reactive power compensation simultaneously
Solution Approach 2:
The integrated device serves multiple functions: it can provide inductive reactive power compensation through the high-voltage windings, capacitive reactive power compensation through the auxiliary windings connected to capacitive components, and can operate in different modes (inductive mode, capacitive mode, or hybrid mode) depending on the switching configuration and operating conditions, making it a universal reactive power compensation solution
2Adaptability or versatility
If the device structure is expanded to include both inductive and capacitive components, then the versatility of reactive power compensation is improved, but the volume of the device increases
Solution Approach 1:
The auxiliary windings are wound around the same core sections as the high-voltage windings, with the auxiliary windings being nested within or adjacent to the high-voltage winding structure. This nested arrangement allows both inductive and capacitive components to share the same magnetic core space, significantly reducing the overall device volume compared to separate inductive and capacitive compensators
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 the provision of both capacitive and inductive reactive power compensation, enhancing the flexibility and effectiveness of reactive power management in high-voltage networks.
Implementation Method 1
additional windings that are inductively coupled to the high-voltage windings
Implementation Method 2
at least one saturation switching branch which is configured for saturating the core sections and has controllable power semiconductor switches
Data Source
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AI summary
In order to create a full variable shunt reactor (FVSR) having two magnetically controllable high-voltage throttles (5, 6) which is compact and at the same time can also provide capacitive reactive power, it is proposed that auxiliary windings (36) are used which are inductively coupled to the high-voltage throttles (5, 6), the auxiliary windings (36) being connected to at least one capacitively acting component (35, 45).