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Short circuit fault current limiter

A technology of fault current limiter and short-circuit fault, which is applied in the direction of circuit devices, emergency protection circuit devices, and protection against overcurrent, which can solve the problems that the current limiting resistor technology is difficult to realize, and is beneficial to heat dissipation design and realization The effect of high voltage current limiting and avoiding the impact of high current

Inactive Publication Date: 2007-01-03
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, as the short-circuit fault capacity of the power grid increases, the current-limiting resistance of the current limiter is technically difficult to realize

Method used

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  • Short circuit fault current limiter
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0025] Such as figure 2 As shown, Embodiment 1 of the present invention is a single-phase short-circuit fault current limiter. Controllable solid-state switch tubes K11, K12, ..., K1n are respectively connected in parallel with current-limiting resistors R11, R12, ..., R1n, and then connected in series with diodes D11, D12, ..., D1m. Controllable solid-state switch tubes K21, K22, ..., K2n are respectively connected in parallel with current-limiting resistors R21, R22, ..., R2n, and then connected in series with diodes D21, D22, ..., D2m, the controllable solid-state switching tubes K31, K32, ..., K3n are respectively The loop connected in parallel with the current limiting resistors R31, R32, ..., R3n, and then connected in series with the diodes D31, D32, ..., D3m, the controllable solid-state switching tubes K41, K42, ..., K4n are respectively co...

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Abstract

A short trouble current limiter in particular relates to transmission and distribution network failure current limiter. It features on available bridge circuit type short trouble current limiter basic, rectifying bridge arm consisting of controllable solid-state switch tube series connected with current limiting resistance shunt circuit and then series connected with diode. The present invention realizes inductor and resistor combined current limiting, not only limiting failure current peak value but also steady state value.

Description

technical field [0001] The invention relates to a short-circuit fault current limiter, in particular to a fault current limiter for transmission and distribution networks. 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 industrial centers continue to increase, which makes the interconnection of power systems , the level of short-circuit current in the power grid at all levels is increasing continuously, and the destructiveness of short-circuit faults to the power system and its connected electrical equipment is also increasing. 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 trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H3/08
Inventor 肖立业张志丰赵彩宏
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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