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Inter-wire superconducting current-limiting tank circuits

A technology of superconducting current limiting and energy storage circuits, which is applied in the direction of emergency protection circuit devices, circuit devices, and systems for storing electric energy used to limit overcurrent/overvoltage, and can solve the problems of inability to stably control transformer voltage, difficulty, low reliability issues

Inactive Publication Date: 2010-05-12
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN100527559C "A line-to-line voltage compensation type current-limiting energy storage circuit" proposes a circuit that can realize fault current limiting and load terminal voltage protection at the same time. The power grid is connected in series. Due to the existence of the current-limiting inductance, the voltage at both ends of the transformer cannot be stably controlled. Therefore, it is difficult to realize the voltage protection at the load end and the reliability is low.

Method used

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  • Inter-wire superconducting current-limiting tank circuits
  • Inter-wire superconducting current-limiting tank circuits
  • Inter-wire superconducting current-limiting tank circuits

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Embodiment Construction

[0017] Figure 5 It is the topological structure of embodiment 1 of the present invention. Such as Figure 5As shown, its structure is as follows: the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5 and the sixth switch S6 form the first current source converter CSC1; the sixth switch S6 The anode of the fifth switch S3 is connected to the cathode of the third switch S3 to form the first AC connection point PA1; the anode of the fifth switch S5 is connected to the cathode of the second switch S2 to form the second AC connection point PA2; the anode of the fourth switch S4 is connected to the first AC connection point PA2. The cathodes of a switch S1 are connected to form the third AC connection point PA3; the anodes of the first switch S1, the second switch S2 and the third switch S3 are connected together to form the first DC connection point PD1; the fourth switch S4, the third switch S3 The cathodes of the fifth switch ...

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Abstract

The invention relates to an inter-wire superconducting current-limiting tank circuit, which adopts a structure in which a plurality of load feed lines share one superconducting magnet, wherein the superconducting magnet simultaneously has the functions of energy storage and current limitation, and the charging power of part of the circuit to the superconducting magnet during short circuit current limitation can be used by other circuits to perform compensation on voltage dip, so the capacity of the superconducting magnet can be greatly reduced. The circuit has the advantages of simple structure, high utilization ratio and low cost.

Description

technical field [0001] The invention relates to an inter-line superconducting current-limiting energy storage circuit. Background technique [0002] With the rapid development of the national economy, the society's demand for electricity continues to increase, which drives the continuous development of the power system. The capacity of single machines and power plants, the capacity of substations, and the load of cities and centers continue to increase, which makes the power systems interconnected. As the level of short-circuit current in the power grid continues to increase, short-circuit faults are becoming more and more destructive to the power system and its connected electrical equipment. Moreover, while the demand for electric energy is increasing day by day, people also put forward higher requirements for power quality, power supply reliability and security. However, the transient stability of large power grids is more prominent, and one of the most important reasons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02J15/00H02J3/01H02J3/18
CPCY02E40/69Y02E40/67Y02E40/30Y02E40/40Y02E40/60
Inventor 郭文勇肖立业戴少涛张志丰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI