Magnetically Controllable Inductor Coil for Series High-Voltage Networks
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Solution Overview
Problem
Existing high-voltage network devices can only be connected in parallel, limiting their application to series connections, and lack effective means for compensating blind power in high-voltage networks.
Innovation Solution
A device with a second high-voltage connection to a phase conductor, featuring a saturation switch branch bridged by a capacitive unit and non-linear resistance, allowing series connection and enhanced regulation capabilities through capacitive and inductive effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a device is connected in parallel to the high-voltage network, then the device can be easily connected with one side to phase conductor and the other side to earth, but the device cannot be connected in series with the phase conductor
Solution Approach 1:
The device is segmented into two separate high-voltage connections: a first high-voltage connection for parallel connection capability and a second high-voltage connection for series connection capability. This segmentation allows the device to be connected in series with the phase conductor through the second connection while maintaining the parallel connection option through the first connection, thus resolving the contradiction between connection ease and connection configuration versatility.
2Adaptability or versatility
If a saturation switch branch is added to enable series connection, then the device can be connected in series with the phase conductor, but the device complexity increases
Solution Approach 1:
The saturation switch branch is merged with the existing high-voltage windings and core structure. The saturation switch branch includes power semiconductor switches that are integrated with the magnetic circuit, allowing the series connection capability to be added without creating a completely separate complex subsystem. This merging approach enables series connection while minimizing the increase in overall device complexity.
3Reliability
If a bridging branch with capacitive unit is added to bridge the high-voltage windings and saturation switch branch, then the device can regulate blind power effectively, but the device complexity increases
Solution Approach 1:
The bridging branch with the capacitive unit is designed to serve multiple functions: it bridges the high-voltage windings and saturation switch branch, enables blind power regulation through capacitive and inductive effects, and provides overvoltage protection. By making this branch multi-functional, the patent reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while achieving reliable blind power compensation.
4Reliability
If the device is connected in series with the phase conductor, then the device can compensate for blind power in the high-voltage network, but the device must handle high-voltage potential on both sides
Solution Approach 1:
The bridging branch with the capacitive unit acts as an intermediary between the high-voltage windings and the saturation switch branch. This intermediary structure helps to distribute and manage the high-voltage stress across multiple components rather than concentrating it in a single point, thereby enabling blind power compensation while mitigating the harmful effects of high-voltage stress on the device.
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 series connection in high-voltage networks and effectively compensates for blind power by regulating inductive effects, protecting against overvoltages and enhancing power management.
Implementation Method 1
The converter is set up in the high -voltage winding associated with it to create a direct current. The direct current is set in such a way that the nucleus enclosed by the winding is driven into a desired state of saturation. In this saturation state, for example, the core material has a very small magnetic permeability, which increases the magnetic resistance of the winding and its inductance is lowered.
Implementation Method 2
the high -voltage windings and the saturation switch branch can be bridged by a bridging branch, whereby a capacitive unit is arranged in the bridging branch
Implementation Method 3
In this saturation state, for example, the core material has a very small magnetic permeability, which increases the magnetic resistance of the winding and its inductance is lowered. With the help of the saturation switch branch, it is possible to saturate the core of the high -voltage windings, so that due to the inductive effect of the high -voltage windings
Implementation Method 4
the bridging branch is connected in parallel in which a non -linear resistance is arranged. The non -linear resistance has a low conductivity and thus high resistance in the normal voltage range, i.e. in the area of the operating voltage. In the case of overvoltages, however, the resistance is reduced, so that the high voltages are broken down by the resistance.
Data Source
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AI summary
The invention relates to a device (1) for reactive power compensation in a high-voltage network (17) having at least one phase conductor (16), comprising at least one first high-voltage terminal (42), which is configured to be connected to a respective phase conductor (16). For each first high-voltage terminal (42), a first and a second core section (3, 6), which are part of a magnetic circuit, a first high-voltage winding (5), which encloses the first core section (3), and a second high-voltage winding (6) are provided. Moreover, the device according to the invention has at least one saturation switching branch (10, 11), which is configured to saturate the core sections (3, 4) and has controllable power semiconductor switches (20, 21, 22, 23). A control unit is used to control the power semiconductor switches, wherein the first and the second high-voltage winding are connected by the high-voltage end (7) thereof to the associated first high-voltage terminal (42) and on the low-voltage side (9) can be connected to one or the saturation switching branch (10, 11). To be able to be connected in series into the high-voltage network, according to the invention, a second high-voltage terminal (44) is provided, which is likewise provided to be connected to a respective phase conductor (16), wherein the saturation switching branch (10, 11) is connected on the side of the saturation switching branch facing away from the high-voltage winding (5, 6) to the second high-voltage terminal (44), such that the device (1) can be connected into the respective phase conductor (16) in series.