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

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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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

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