引用本文: | 李啸骢,陈葆超,徐俊华,王占颖.加速功率型电力系统稳定器整定方法研究[J].电力系统保护与控制,2015,43(17):63-68.[点击复制] |
LI Xiaocong,CHEN Baochao,XU Junhua,WANG Zhanying.Research on parameter setting method for improved rotational speed power system stabilizer[J].Power System Protection and Control,2015,43(17):63-68[点击复制] |
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摘要: |
为了给加速功率型电力系统稳定器(PSS2A)现场试验提供参考整定值,减少反复试验对发电机及电力系统的影响,使励磁控制器在低频振荡下具有较好的鲁棒性,提出一种基于加速功率信号拟合的在线整定的方法。运用TLS-ESPRIT算法对PSS2A加速功率信号进行拟合得到系统的相频特性,根据留数法算出PSS2A超前环节需要补偿角度的整定参数。利用该方法对南方电网某水电厂机组实测数据进行建模仿真,与现场采用频谱仪测量计算得到的整定值进行仿真比较分析。数值仿真及实例分析表明该方法得到的整定参数具有较好的参考价值,可给现场调试带来方便。 |
关键词: 电力系统稳定器 在线整定 TLS-ESPRIT算法 留数法 相频特性 |
DOI:10.7667/j.issn.1674-3415.2015.17.010 |
投稿时间:2014-11-11修订日期:2015-03-14 |
基金项目:国家自然科学基金资助项目(51267001);广西科学研究与技术开发计划项目(14122006-29);广西自然科学基金资助项目(2014GXNSFAA118338) |
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Research on parameter setting method for improved rotational speed power system stabilizer |
LI Xiaocong,CHEN Baochao,XU Junhua,WANG Zhanying |
(College of Electrical Engineering, Guangxi University, Nanning 530004, China) |
Abstract: |
An online setting method based on fitting with rotational power signal is proposed to provide a reference setting value of improved rotational speed power system stabilizer (PSS2A) in field tests, which reduces the repeated tests’ impact on the generator and the power system, enables the excitation controller has robustness in the situation of low-frequency oscillation. The TLS-ESPRIT algorithm is used in the method to fit the accelerating power signal of PSS2A and get the phase frequency characteristics of the system. The residue method is required to calculate the angle to be compensated of lead link in PSS2A. The measured data of a hydropower plant in CSG is simulated by using this method, and the simulation result is compared with the setting value calculated by spectrum analyzer in the field. Numerical simulation and test analysis prove that the setting value obtained by this method has a better reference value, which brings a convenience to the field debugging. |
Key words: PSS online setting TLS-ESPRIT algorithm residue method phase-frequency characteristics |