Fault early-warning system and method for electric power circuit of wind power field
A power line and fault early warning technology, which is applied in the field of wind farm power line fault early warning and wind farm power line fault early warning system, can solve problems such as hidden dangers of stable and safe operation of the power system, improve the reliability of power supply, and ensure safe operation. , the effect of reducing failures
Active Publication Date: 2014-03-19
TSINGHUA UNIV +2
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Problems solved by technology
The recent large-scale wind farm failures caused off-grid accidents have brought great hidden dangers to the stable and safe operation of the power system
[0003] However, the fault handling of the current power system focuses on quickly and selectively isolating the faulty equipment after the fault occurs, which is a post-processing strategy.
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[0028] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0030] figure 1 A block diagram of a fault early warning system for a power line of a wind farm according to an embodiment of the present invention is shown.
[0031] Such as figure 1 As shown, th...
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The invention provides a fault early-warning system and method for an electric power circuit of a wind power field. The method comprises the following steps that: a travelling wave electrical quantity of the electric power circuit of the wind power field is collected in real time; whether disturbance occurs is determined according to the travelling wave electrical quantity and the disturbance generation time is recorded; whether the disturbance occurs at the monitored electric power circuit is determined; if so, a disturbance distance is calculated; comparison between the disturbance distance and the last disturbance distance is carried out and whether the two disturbance distances are consistent with each other is determined; if the two disturbance distances are consistent, a time interval of the last two disturbance at the monitored electric power circuit is calculated; the time interval is compared with a preset time interval; and when the time interval is less than the preset time interval, that a fault is going to occur at the monitored electric power circuit is determined and a fault early-warning result is outputted. According to the invention, the running situation of the electric power circuit of the wind power field can be monitored in real time and the fault early-warning information can be provided for the wind power field timely, so that the wind power field fault is reduced; and power supply reliability of the wind power field is improved and the secure running of the wind power field is ensured.
Description
technical field [0001] The invention relates to the technical field of electric power system relay protection, in particular to a fault early warning system for a wind farm power line and a fault early warning method for a wind farm power line. Background technique [0002] Wind farms are an important part of the new generation grid. The recent large-scale wind farm failures caused off-grid accidents have brought great hidden dangers to the stable and safe operation of the power system. [0003] However, the fault handling of the current power system focuses on quickly and selectively isolating the faulty equipment after the fault occurs, which is a post-processing strategy. [0004] Therefore, a new technical solution is needed, which can accurately identify the fault development process of distribution lines and realize early warning of wind farm faults, so as to improve the reliability of power supply of wind farms and reduce the fault loss of wind farms. Contents of t...
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IPC IPC(8): G01R31/08
Inventor 施慎行董新洲梅春晓臧今为沙济通程亚平张志刚姜巍齐天来
Owner TSINGHUA UNIV