| 引用本文: | 徐业荣,包明磊,李玉平,等.大型汽轮发电机失磁保护定值整定探讨[J].电力系统保护与控制,2016,44(20):154-159. |
| XU Yerong,BAO Minglei,LI Yuping,et al.Discussion on setting calculation of large steam turbine generator loss-of-excitation protection[J].Power System Protection and Control,2016,44(20):154-159 |
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| 大型汽轮发电机失磁保护定值整定探讨 |
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徐业荣1,2,包明磊1,2,李玉平1,2,桑建斌1,2,李 明1,2
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(1.南京国电南自电网自动化有限公司，江苏 南京 211100;2.国电南京自动化股份有限公司，江苏 南京 211100)
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| 摘要: |
| 通过分析大型汽轮发电机失磁故障时机端阻抗变化与功率输出变化，比较两种失磁保护方案:阻抗原理和逆无功原理失磁保护。经过比较发现两种保护原理主判据实质上相同，信号出口方式相同。针对逆无功原理失磁保护定值整定没有导则问题，提出阻抗动作边界映射至P-Q平面方法，确定发电机失磁故障时功率动作边界。克服逆无功原理失磁保护逆无功定值依靠工程经验整定困难，进一步提高保护定值整定可靠性。以一台1 000 MW汽轮发电机参数作为计算实例，计算两种保护原理的保护定值，为双重化双原理失磁保护配置提供具体参考。 |
| 关键词: 汽轮发电机 失磁保护 阻抗原理 逆无功原理 定值整定 |
| DOI：10.7667/PSPC201626 |
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| Discussion on setting calculation of large steam turbine generator loss-of-excitation protection |
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XU Yerong1,2,BAO Minglei1,2,LI Yuping1,2,SANG Jianbin1,2,LI Ming1,2
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(1. Nanjing SAC Power Grid Automation Co., Ltd., Nanjing 211100, China;
;2. Guodian Nanjing Automation Co., Ltd., Nanjing 211100, China)
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| Abstract: |
| This paper compares the two criterions of generator loss-of-excitation protection based on impedance principle and inverse reactive power principle, by analyzing the variation of the steam turbine generator’s power output and generator-end impedance. The main criterions of the two protection principles are demonstrated the same principle and trip mode. The main action area of loss-of-excitation protection based on impedance principle is mapped from impedance plane to P-Q plane, in order to get the power action area. The function can save the setting calculation of the latter one from engineering experience. Finally, taking a 1 000 MW steam turbine generator as an example, the setting calculation of the two kinds of protection principles are calculated, which provides a specific reference for the dual principle loss-of-excitation protection configuration. |
| Key words: steam turbine generator loss-of-excitation protection impedance principle inverse reactive power principle setting calculation |
