| 引用本文: | 桑建斌,包明磊,李玉平,万洛飞,李明,朱宇聪.300 Mvar调相机继电保护的分析与改进[J].电力自动化设备,2019,39(6): |
| SANG Jianbin,BAO Minglei,LI Yuping,WAN Luofei,LI Ming,ZHU Yucong.Analysis and improvement of relay protection of 300 Mvar synchronous condenser[J].Electric Power Automation Equipment,2019,39(6): |
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| 摘要: |
| 介绍了已投运300 Mvar调相机的启动特点、运行特点以及继电保护配置方案。分析了调相机启机时的谐波特性对调相机保护的影响，在此基础上对调相机保护在启机及并网运行过程中的状态闭锁逻辑进行了讨论，给出了调相机保护的状态闭锁配置。鉴于频率跟踪在调相机保护中的重要性，根据启机过程中的谐波特性、变频特性，在过零点测频算法中增加了低通滤波、过零点抖动甄别，并进行了仿真和实验验证，结果表明防干扰处理后的过零点测频在保证精度与响应速度的同时，抗干扰性能良好。 |
| 关键词: 调相机 继电保护 保护配置 状态闭锁 频率跟踪 过零点测频 仿真 |
| DOI：10.16081/j.issn.1006-6047.2019.06.031 |
| 分类号:TM77 |
| 基金项目: |
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| Analysis and improvement of relay protection of 300 Mvar synchronous condenser |
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SANG Jianbin1, BAO Minglei1, LI Yuping1, WAN Luofei2, LI Ming1, ZHU Yucong1
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1.Nanjing SAC Power Grid Automation Co.,Ltd.,Nanjing 211100, China;2.NARI Group Corporation, Nanjing 210006, China
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| Abstract: |
| The start-up characteristics, operating characteristics and relay protection configuration scheme of 300 Mvar synchronous condenser that has been put into operation are introduced. The influence of the harmonic characteristics during the start-up process on the synchronous condenser protection is analyzed, based on which, the blocking logic of the synchronous condenser protection during the process of start-up and grid-connection operation is discussed, and the state blocking configuration of the synchronous condenser protection is proposed. In view of the importance of frequency tracking in the synchronous condenser protection, according to the harmonic characteristics and frequency conversion characteristics in the start-up process, the low-pass filtering and zero-crossing jitter discrimination are added in the frequency measurement methods. The simulation and experimental verification show that the zero-crossing frequency measurement after anti-interference processing can not only guarantee the accuracy and response speed, but also have good anti-interference performance. |
| Key words: synchronous condenser relay protection protection configuration state blocking configuration frequency tracking zero-crossing frequency measurement simulation |
