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Integrated fast switching current limiter and method for cooperating with circuit breaker

A fast switch and current limiter technology, which is applied to high-voltage air circuit breakers, electric switches, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as too long connecting busbars and increased failure probability, Achieve the effect of reducing volume cost and improving transient stability

Active Publication Date: 2021-08-10
西安合容开关有限公司
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Problems solved by technology

[0005] In order to solve the problems of the fast switch and current-limiting reactor separated electrical parallel connection, the connecting busbar is too long and the probability of failure is increased, and to accelerate the popularization and application of fast-switching current limiter products, the present invention proposes an integrated fast-switching limiter Circuit breaker and method for cooperating with line circuit breaker

Method used

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  • Integrated fast switching current limiter and method for cooperating with circuit breaker
  • Integrated fast switching current limiter and method for cooperating with circuit breaker
  • Integrated fast switching current limiter and method for cooperating with circuit breaker

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Embodiment Construction

[0028] In the following, combined with the accompanying drawings and specific implementation methods, taking the fast switching current limiter used in the 10kV distribution network system as an example, the integrated fast switching current limiter and its cooperation method with the circuit breaker reclosing will be further detailed illustrate.

[0029] Such as figure 1 Shown is the structure diagram of an integrated fast switching current limiter for a 10kV distribution network system, including a current limiting reactor and a fast vacuum switch integrated inside the current limiting reactor and electrically connected in parallel with it. Among them, the current-limiting reactor includes an incoming line flange 101, an upper conductive seat 102, a reactor wire package 103, a lower conductive seat 104, and an outgoing line flange 105; one end of the incoming line flange 101 is directly connected to the line, and the other end is connected to the upper conductive line. The ...

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Abstract

The invention discloses an integrated integrated fast switch type current limiter and a method for cooperating with a circuit breaker. The current limiter integrates a fast vacuum switch inside a current limiting reactor and electrically connects it in parallel. The cooperation method is: the current limiter control system monitors the short-circuit current of the system, and controls the fast vacuum switch to open, so as to realize the rapid limitation of the short-circuit current within 20ms. The short-circuit current is limited, and the fast vacuum switch closes after the circuit breaker completes the first opening. If the circuit breaker coincides with a temporary fault, the current limiter is in a micro-loss operation state; if the circuit breaker coincides with a permanent fault, the current limiter operates again, and the circuit breaker breaks the limited short-circuit current again. The invention realizes the integrated integration of the fast-switching current limiter, can greatly reduce its volume cost, and can effectively reduce the dynamic and thermal stability technical index of the current-limiting reactor at the same time.

Description

technical field [0001] The invention relates to the technical field of fast switching current limiters, in particular to an integrated fast switching current limiter and a method for cooperating with a circuit breaker. Background technique [0002] With the rapid development of my country's economy and the continuous expansion of the scale of the power grid, the short-circuit current of power grids at all levels continues to rise, especially in large energy bases and load-intensive areas. Safe and stable operation of equipment. In order to improve the reliability of the power supply of the power system, the current grid is forced to limit the short-circuit current by means of busbar segmentation, splitting of the ring network, and extension of the transmission line, which not only significantly increases the equipment investment, but also reduces the stability of the system operation . [0003] The fault current limiter (referred to as the current limiter) is the key equipm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02H02H7/26H02H3/02H02H3/06H02H3/08H01H33/66H01H33/59
CPCH01H33/59H01H33/66H02H3/025H02H3/066H02H3/08H02H7/26H02H9/02H02H9/021
Inventor 姚晓飞郝治国
Owner 西安合容开关有限公司
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