A Saturated Bridge Short Circuit Fault Current Limiter

A short-circuit fault and current limiter technology, which is applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problems of high technical difficulty and high cost of bias power supply, and achieve Fast fault response, good current limiting effect, and improved current limiting ability

Active Publication Date: 2016-10-19
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Description
  • Claims
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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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  • A Saturated Bridge Short Circuit Fault Current Limiter
  • A Saturated Bridge Short Circuit Fault Current Limiter
  • A Saturated Bridge Short Circuit Fault Current Limiter

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like figure 2 As shown, the specific embodiment 1 of the present invention is a single-phase saturated bridge short-circuit fault current limiter. The single-phase saturated bridge short-circuit fault current limiter includes a rectifier bridge Br and a saturated reactor L. Wherein, the rectifier bridge Br is composed of a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. The connection point of the first diode D1 and the second diode D2 is the first AC terminal A, the connection point of the third diode D3 and the fourth diode D4 is the second AC terminal B, and the first diode The connection point of the tube D1 and the third diode D3 is the first DC terminal M, and the connection point of the second diode D2 and the fourth diode D4 is the second DC terminal N. The saturable reactor L is connected between t...

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Abstract

A saturated bridge short-circuit fault current limiter is composed of a saturated reactor and a rectifier bridge. The connection points of the first diode (D1) and the second diode (D2) of the rectifier bridge (Br) are the first AC terminal (A), the third diode (D3) and the fourth diode ( The connection point of D4) is the second AC terminal (B), the connection point of the first diode (D1) and the third diode (D3) is the first DC terminal (M), and the second diode ( The connection point of D2) and the fourth diode (D4) is the second DC terminal (N); the saturable reactor (L) is connected between the first DC terminal (M) and the second DC terminal (N); One end of the AC power supply (Uac) is connected to the first AC terminal (A), and the other end of the AC power supply (Uac) is grounded; one end of the circuit breaker (SW) is connected to the second AC terminal B, and the other end of the circuit breaker (SW) with load (R L ) in series and grounded. Saturable reactors are realized by permanent magnets and DC coils.

Description

technical field [0001] The invention relates to a saturated bridge type short-circuit fault current limiter, in particular to a short-circuit 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 reliabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02
Inventor 张志丰孙强刘大千邱清泉肖立业张国民戴少涛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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