Mixed-type high-temperature superconducting short trouble current limiter

A short-circuit fault and high-temperature superconducting technology, which is applied in the usage of superconductor elements, circuit devices, emergency protection circuit devices, etc., can solve the problems of high technical difficulty and high cost of bias power supply, and achieve market competitiveness and small steady-state impact , Adaptable effect

Inactive Publication Date: 2014-07-30
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

At the same time, the current flowing through the bias power supply is often 2 to 3 times the grid current, and must meet the requirements of the current change in the non-fault state and the fault state. Therefore, the realization of the bias power supply has certain technical difficulties and high requirements. cost

Method used

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  • Mixed-type high-temperature superconducting short trouble current limiter
  • Mixed-type high-temperature superconducting short trouble current limiter
  • Mixed-type high-temperature superconducting short trouble current limiter

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0025] Such as figure 2 As shown, the specific embodiment 1 of the present invention is a single-phase short-circuit fault current limiter. The short-circuit fault current limiter consists of the first diode D 1 , The second diode D 2 , The third diode D 3 And the fourth diode D 4 It is composed of a rectifier bridge, a first protection resistor Rv, a high temperature superconducting coil SL, a switch tube K, a DC reactor Lb, a second protection resistor Ra and a protection diode Da. Among them, the first diode D 1 And the second diode D 2 The connection point is the first AC terminal A, the third diode D 3 And the fourth diode D 4 The connection point is the second AC terminal B, the first diode D 1 And the third diode D 3 The connection point is the first DC terminal M, the second diode D 2 And the fourth diode D 4 The connection point is the second DC termi...

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Abstract

The invention discloses a short trouble current limiter which is composed of a rectifier bridge, a first protective resistor (Rv), a high-temperature superconducting coil (SL), a switching tube (K), a direct current reactor (Lb), a second protective resistor (Ra) and a protected diode (Da), wherein the rectifier bridge is composed of a first diode (D1), a second diode (D2), a third diode (D3) and a fourth diode (D4); a protective resistor (Rs), the switching tube (K) and the high-temperature superconducting coil (SL) are connected in parallel, and the parallel branch is connected between the first direct current end M and the third direct current end P of the rectifier bridge; the second protective resistor (Ra) and the serial branch of the protected diode (Da) are connected with the direct current reactor (Lb) in parallel, and the parallel branch is connected between the second direct current end N and the third direct current end P of the rectifier bridge. The current limiter is connected with the direct current reactor and the high-temperature superconducting coil on the direct current end of the diode rectifier bridge to realize mutual current limiting.

Description

Technical field [0001] The invention relates to a fault current limiter for a transmission and distribution network, in particular to a short-circuit fault current limiter based on YBCO high temperature superconducting tape. Background technique: [0002] With the rapid development of the national economy, the society’s demand for electricity continues to increase, which has led to the continuous development of the power system. The capacity of single machines and power plants, the capacity of substations, and urban and industrial center loads continue to increase, which makes the power systems interconnected. , The level of short-circuit current in the power grids at all levels continues to increase, and 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, people have also put forward higher requirements for power quality, power supply reliability and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
CPCY02E40/69Y02E40/60
Inventor 张志丰张京业戴少涛肖立业周义刚武鑫
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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