基于随机子空间方法的电力系统稳定器阻尼判断

朱建华, 李振清, 许立长, 厉志波, 马建胜, 侯惠昭

1．润电能源科学技术有限公司电气技术中心，河南省郑州市 450000；2．华电电力科学研究院有限公司，浙江省杭州市 310030

Damping Judgment of Power System Stabilizer Based on Stochastic Subspace Method

ZHU Jianhua, Li Zhenqing, XU Lichang, LI Zhibo, MA Jiansheng, HOU Huizhao

1. Electrical Technology Center, Rundian Energy Science and Technology Co., Ltd., Zhengzhou 450000, Henan Province, China; 2. Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, Zhejiang Province, China

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摘要: 针对目前电力系统稳定器(power system stabilizer，PSS)接入电厂后的阻尼判断问题，采用Heffron-Phillips模型进行分析，利用随机子空间方法计算阻尼转矩和功角在主要模态下的相位关系，以此来判断PSS的阻尼效果。以某1 000 MW机组为例，分别采用单机系统模拟和实测数据进行验证，结果表明：随机子空间方法可以准确估计出噪声背景下电磁转矩和功角之间相位的超前或滞后关系，进而判断出PSS接入电厂后的阻尼效果，且该方法具有较强的抗噪性。

关键词 ：电力系统稳定器, 阻尼判断, 随机子空间, 相位关系

Abstract：Aiming at the current damping judgment problem after power system stabilizer (PSS) was connected into power plant, the Heffron-Phillips model was used for analysis, and the phase relationship between the damping torque and the power angle in the main mode was calculated by using the stochastic subspace method, to judge the damping effect of PSS. Taking a 1 000 MW unit as an example, the single-unit system simulation and actual data were used for verification. The results show that the stochastic subspace method can accurately estimate the phase lead or lag relationship between the electromagnetic torque and the power angle under a noise background, and then judge the damping effect of PSS after it is connected into the power plant. Moreover, the method has strong noise resistance.

Key words： power system stabilizer (PSS) damping judgment stochastic subspace phase relationship

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	朱建华
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引用本文:

朱建华, 李振清, 许立长, 厉志波, 马建胜, 侯惠昭. 基于随机子空间方法的电力系统稳定器阻尼判断[J]. 发电技术, .
ZHU Jianhua, Li Zhenqing, XU Lichang, LI Zhibo, MA Jiansheng, HOU Huizhao. Damping Judgment of Power System Stabilizer Based on Stochastic Subspace Method. Power Generation Technology, 0, (): 1-.

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