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首页> 外文会议>2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies >Influence on transmission line relay protection under DFIG-based wind farm intergration
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Influence on transmission line relay protection under DFIG-based wind farm intergration

机译：基于DFIG的风电场整合对输电线路继电保护的影响

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摘要

In conventional wind farm outgoing line protections, the fault characteristics of wind farms have been rarely considered and thus the protections may mal-operate or refusal-operation due to the integration of large-scale wind power. This paper analyzes fault characteristics of the outgoing transmission line from a DFIG-based wind farm with LVRT capability and indicates that the main frequency component of the wind farm side short-circuit current varies with the speed of wind turbine generators, while the main frequency component of the wind farm side bus voltage still maintains the power frequency during a non-bolted-three-phase fault in the outgoing transmission line. Performances of directional protection based on the positive sequence voltage and current power frequency, the distance element using the power frequency voltage current ratio to measure fault distance, and the fault-type element which uses the sequence current or phase current differential mutation quantity are affected severely, while zero sequence current protection is affected to some degrees. Performances of those two algorithms are analyzed and compared on the PSCAD/EMTDC platform.
机译：在常规的风电场出线保护中，很少考虑风电场的故障特性，因此，由于大规模风电的集成，该保护可能会误操作或拒绝操作。本文分析了具有LVRT功能的基于DFIG的风电场出线传输线路的故障特征，并指出风电场侧短路电流的主频率分量随风力发电机的速度而变化，而主频率分量风电场侧母线电压的最大值在传出输电线路的非螺栓三相故障期间仍保持电源频率。严重影响基于正序电压和当前工频的方向保护，使用工频电压电流比测量故障距离的距离元件以及使用序电流或相电流差分突变量的故障型元件的性能，而零序电流保护在某种程度上会受到影响。在PSCAD / EMTDC平台上分析并比较了这两种算法的性能。

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