Converter station comprising RL-type superconducting current limiter and direct-current circuit breaker and direct-current fault processing strategy of converter station

A technology of DC circuit breaker and superconducting current limiter, applied in the field of converter station and its DC fault treatment strategy, can solve problems such as excessive stability of smoothing reactor, improve safe and stable operation ability, and solve adverse effects , the effect of low impedance characteristics

Active Publication Date: 2020-04-07
STATE GRID JIANGSU ECONOMIC RES INST +3
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Problems solved by technology

[0007] In view of the above, the present invention provides a converter station containing an RL type superconducting current limiter and a DC circuit breaker and its DC fault handling strategy. On the one hand, the technical solution utilizes the High-impedance characteristics, on the other hand, it uti

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  • Converter station comprising RL-type superconducting current limiter and direct-current circuit breaker and direct-current fault processing strategy of converter station
  • Converter station comprising RL-type superconducting current limiter and direct-current circuit breaker and direct-current fault processing strategy of converter station
  • Converter station comprising RL-type superconducting current limiter and direct-current circuit breaker and direct-current fault processing strategy of converter station

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[0030] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] In the converter station containing the RL type superconducting current limiter and the DC circuit breaker of the present invention, the positive DC outgoing line and the negative DC outgoing line of the converter station first need to be connected to the positive DC bus and the negative DC bus respectively through mechanical switches; the positive DC bus and the The negative DC busbar needs to go through a smoothing reactor, a DC circuit breaker, a resistive superconducting current limiting device, and then be connected to the positive and negative DC lines respectively.

[0032] Such as figure 1 As shown, when the converter station adopts a true bipolar structure, both positive and negative poles have independent converters, and the converters us...

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Abstract

The invention discloses a converter station comprising an RL type superconducting current limiter and a direct-current circuit breaker and a direct-current fault processing strategy of the converter station. According to the technical scheme, on one hand, the high-resistance characteristic of the resistance-type superconducting current limiter after a fault occurs is utilized, and on the other hand, the suppression effect of the reactor on the fault current is utilized, so that the on-off capability of the direct-current circuit breaker under the existing technical conditions can be fully exerted; meanwhile, the stability problem possibly caused by the fact that the smoothing reactor is too large in a normal operation state can be solved. In addition, the invention provides a set of complete direct current fault processing strategy for the converter station comprising the RL type superconducting current limiter and the direct current circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission and distribution, and in particular relates to a converter station including an RL-type superconducting current limiter and a DC circuit breaker and a DC fault processing strategy thereof. Background technique [0002] With the continuous deepening of a new round of energy revolution and the increasing environmental problems, the strategic adjustment of my country's energy structure is imminent. The fundamental way to further promote energy transformation and realize green and low-carbon development is to accelerate clean development, implement "two substitutions", and strive to get rid of excessive dependence on fossil energy by building an energy network centered on electricity. Among them, in order to break through the bottleneck of clean energy development and realize large-scale development, large-scale allocation and high-efficiency utilization of clean energy, the key ro...

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Application Information

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IPC IPC(8): H02H9/02H02H7/26
CPCH02H7/262H02H7/263H02H7/268H02H9/021H02H9/023Y02E40/60
Inventor 韩笑李妍王琼田方媛诸晓骏曹程杰戚文徐政张哲任徐雨哲
Owner STATE GRID JIANGSU ECONOMIC RES INST
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