| 引用本文: | 孔祥敏,刘丽花,张亮红,等.基于暂态高频能量的直驱风场汇集线路保护[J].电力系统保护与控制,2023,51(4):93-103.[点击复制] |
| KONG Xiangmin,LIU Lihua,ZHANG Lianghong,et al.Protection of a direct-driven wind farm collection line based on transient high-frequency energy[J].Power System Protection and Control,2023,51(4):93-103[点击复制] |
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| 摘要: |
| 针对直驱风场汇集线路故障难以识别的问题，提出了一种基于暂态高频能量的直驱风场汇集线路保护方法。首先，基于风机变流器控制系统与电气参数影响，结合元件在高频区段的暂态特性，建立由感性阻抗构成的风场汇集线路暂态高频模型。在此基础上，建立区内外故障下的暂态高频网络，根据不同故障场景与保护安装处暂态高频能量的匹配特性，构建基于暂态高频能量方向差异的保护判据。最后，在RT-LAB仿真平台验证了所提方法在各种故障情况下，均能正确识别区内外故障，故障识别不受同步误差影响，耐过渡电阻能力强。 |
| 关键词: 直驱风场 控制策略 汇集线路 暂态能量 方向保护 |
| DOI：10.19783/j.cnki.pspc.221033 |
| 投稿时间：2022-07-04修订日期：2022-11-08 |
| 基金项目:国家自然科学基金项目资助(51822703) |
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| Protection of a direct-driven wind farm collection line based on transient high-frequency energy |
| KONG Xiangmin1,LIU Lihua1,ZHANG Lianghong1,ZHAO Wenyue2,MA Jing2 |
| (1. Economic and Electrical Research Institute of Shanxi Electrical Power Company of SGCC, Taiyuan 030024, China;
2. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China) |
| Abstract: |
| It is difficult to identify a fault on a direct-driven wind farm collection line. Thus a protection of the line based on transient high-frequency energy is proposed. First, considering the converter control strategy, the electrical parameters and component transient characteristics in the high-frequency section, a wind farm collection line transient high-frequency model composed of inductive impedance is established. Then a transient high-frequency network of internal or external faults is established. According to the matching degree of different fault cases and transient high frequency energy at the protection installation site, a protection criterion is constructed using the difference of transient high-frequency energy direction. Finally, an RT-LAB simulation platform verifies that this method can correctly identify the internal or external faults under various fault conditions. The fault identification is not affected by synchronization error, and has strong resistance to transition resistance.
This work is supported by the National Natural Science Foundation of China (No. 51822703). |
| Key words: direct-driven wind farm control strategy collection line transient energy directional protection |
