| 电力系统一次调频过程的超低频振荡分析 |
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| 引用本文： | 路晓敏,陈磊,陈亦平,闵勇,侯君,刘映尚.电力系统一次调频过程的超低频振荡分析[J].电力系统自动化,2017,41(16):64-70. |
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| 作者姓名： | 路晓敏 陈磊 陈亦平 闵勇 侯君 刘映尚 |
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| 作者单位： | 清华大学电机工程与应用电子技术系, 北京市 100084; 电力系统及发电设备控制和仿真国家重点实验室, 清华大学, 北京市 100084,清华大学电机工程与应用电子技术系, 北京市 100084; 电力系统及发电设备控制和仿真国家重点实验室, 清华大学, 北京市 100084,中国南方电网电力调度控制中心, 广东省广州市 510623,清华大学电机工程与应用电子技术系, 北京市 100084; 电力系统及发电设备控制和仿真国家重点实验室, 清华大学, 北京市 100084,中国南方电网电力调度控制中心, 广东省广州市 510623,中国南方电网电力调度控制中心, 广东省广州市 510623 |
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| 基金项目： | 国家自然科学基金资助项目(51377002);中国南方电网有限责任公司科技项目 |
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| 摘 要： | 实际系统中多次发生一次调频过程不稳定导致的超低频频率振荡事件,在机理和表现上与传统的低频振荡存在显著区别。超低频频率振荡属于频率稳定的范畴,单机单负荷系统是研究该问题的最简系统。基于单机单负荷系统研究了超低频频率振荡的振荡频率、阻尼、振荡表现等关键特征。解析推导了简化模型下的振荡频率和阻尼并分析其影响因素。引入伯德图方法分析详细模型下的振荡频率和阻尼,幅值交接频率、相角裕度分别与振荡频率、阻尼比对应。证明了阻尼转矩法在分析原动系统阻尼特性时的适用性。采用相量图方法说明超低频频率振荡中机械功率的振荡幅度大于电磁功率。
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| 关 键 词： | 超低频频率振荡 有功频率控制 一次调频 小扰动稳定 振荡频率和阻尼 阻尼转矩 |
| 收稿时间： | 2016/12/8 0:00:00 |
| 修稿时间： | 2017/6/24 0:00:00 |
Ultra-low-frequency Oscillation of Power System Primary Frequency Regulation |
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| LU Xiaomin,CHEN Lei,CHEN Yiping,MIN Yong,HOU Jun and LIU Yingshang.Ultra-low-frequency Oscillation of Power System Primary Frequency Regulation[J].Automation of Electric Power Systems,2017,41(16):64-70. |
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| Authors: | LU Xiaomin CHEN Lei CHEN Yiping MIN Yong HOU Jun and LIU Yingshang |
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| Affiliation: | Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China,Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China,China Southern Grid Power Dispatching and Control Center, Guangzhou 510623, China,Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China,China Southern Grid Power Dispatching and Control Center, Guangzhou 510623, China and China Southern Grid Power Dispatching and Control Center, Guangzhou 510623, China |
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| Abstract: | In the actual system, the ultra-low-frequency frequency oscillation(ULFFO)event caused by instability of the primary frequency regulation process is different from the traditional low-frequency oscillation in both mechanism and performance. ULFFO belongs in the category of frequency stability. The single-machine single-load system is the simplest system to study this problem. Such key characteristics of ULFFO as oscillation frequency, damping and oscillation performance are tackled based on the single-machine single-load system. The oscillation frequency and damping as well as their influencing factors are derived and analyzed in the simplified model. The Bode plot method, whose crossover frequency and phase margin corresponds to the oscillation frequency and damping ratio respectively, is used to investigate the oscillation frequency and damping in the detailed model. The applicability of the damping torque method in treating the damping of the prime mover system is confirmed. The amplitude of mechanical power is larger than that of electromagnetic power in ULFFO. This work is supported by National Natural Science Foundation of China(No. 51377002)and China Southern Power Grid Company Limited. |
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| Keywords: | ultra-low-frequency frequency oscillation active power and frequency control primary frequency regulation small disturbance stability oscillation frequency and damping damping torque |
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