| 引用本文: | 侯俊杰,宋国兵,常 鹏,等.计及对端系统参数和送出线路分布参数影响的
风电系统时域距离保护[J].电力系统保护与控制,2022,50(5):106-116.[点击复制] |
| HOU Junjie,SONG Guobing,CHANG Peng,et al.Time-domain distance protection for a wind power system considering parameters of the remote end system and influence of outgoing line distribution parameters[J].Power System Protection and Control,2022,50(5):106-116[点击复制] |
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| 摘要: |
| 为解决现有时域距离保护在风电并网系统长线距离I段末端发生高阻接地故障时存在的局限性，在分布参数模型的基础上计及对端系统参数，提出了一种适用于风电系统长线的时域距离保护新原理。讨论了现有时域距离保护在长线影响和对端系统影响下的保护性能。在计及长线的分布参数效应的基础上，将近端电气量归算至长线距离I末端补偿点。在补偿点与故障支路之间构建计及对端系统参数的时域故障回路方程，联立方程获得故障发生位置。结合保护整定值，实现距离保护判据。仿真结果表明，提出的保护原理考虑了长线分布参数影响适应于较长的送出线路。另外，考虑了对端系统影响，当长线距离I段末端发生300 Ω过渡电阻接地故障时，保护仍能正确动作，受采样率等干扰因素影响较小。 |
| 关键词: 风电系统 时域 距离保护 对端系统 分布参数模型 |
| DOI：DOI: 10.19783/j.cnki.pspc.210701 |
| 投稿时间：2021-06-14修订日期：2021-10-12 |
| 基金项目:国家电网有限公司科技项目资助(5100- 202040327A-0-0-00) |
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| Time-domain distance protection for a wind power system considering parameters of the remote end system and influence of outgoing line distribution parameters |
| HOU Junjie,SONG Guobing,CHANG Peng,CHANG Nana,LI Xindong,WU Dan |
| (1. School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2. NARI Group Corporation
(State Grid Electric Power Research Institute Co., Ltd.), Nanjing 211106, China) |
| Abstract: |
| There is a problem of the limits of existing time-domain distance protection when it comes to a grounding fault with high fault resistance occurring at the end of distance section I in a wind power system long transmission line. This paper presents a time-domain distance protection algorithm for a wind power system long line based on the distributed parameter model and the remote end system parameters. The performance of existing time-domain distance protection under the influences of a long line and remote-end system are discussed. Taking into account the distributed parameter effect of the long line, the near-end electrical quantity is calculated to the compensation point at the end of section I on the long line. The time-domain fault loop equation considering the parameters of the remote end system is constructed between the compensation point and the fault branch, and the fault location is obtained by calculating equations. Combined with the protection setting value, the distance protection criterion is realized. Simulation results show that the proposed protection principle considers the influence of a long line distribution parameters and is suitable for long transmission lines. In addition, when a grounding fault with 300 Ω fault impedance occurs at the end of section I for a long line, the protection can still operate correctly by considering the impact on the end system and is less affected by interference factors such as sampling rate.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. 5100-202040327A-0-0-00). |
| Key words: wind power system time-domain distance protection system from remote end distributed parameter model |
