Converter station with rl-type superconducting current limiter and DC circuit breaker and its DC fault handling strategy

A technology of DC circuit breaker and superconducting current limiter, which is applied in the field of converter station and its DC fault handling strategy, can solve problems such as excessive stability of smoothing reactors, improve safe and stable operation capability, and reduce breakage Current requirements, the effect of solving adverse effects

Active Publication Date: 2021-11-30
STATE GRID JIANGSU ECONOMIC RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 utilizes the suppressing effect of the reactor on the fault current, which can give full play to the breaking capacity of the DC circuit breaker under the existing technical conditions; at the same time, the present invention can solve the possibility that the smoothing reactor is too large stability issues

Method used

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  • Converter station with rl-type superconducting current limiter and DC circuit breaker and its DC fault handling strategy
  • Converter station with rl-type superconducting current limiter and DC circuit breaker and its DC fault handling strategy
  • Converter station with rl-type superconducting current limiter and DC circuit breaker and its DC fault handling strategy

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Embodiment Construction

[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 with RL type superconducting current limiter and DC circuit breaker and its DC fault handling strategy. On the one hand, the technical solution utilizes the high resistance characteristic of the resistive superconducting current limiter after a fault , on the other hand, the restraining effect of the reactor on the fault current can be used to give full play to the breaking capacity of the DC circuit breaker under the existing technical conditions; Stability issues. In addition, the present invention proposes a complete DC fault handling strategy for the provided converter station containing the RL-type superconducting current limiter and the DC 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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Patent Type & Authority Patents(China)
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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