| 次同步振荡中暂态能量流与电功率和阻尼转矩的关系 |
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| 引用本文： | 任怡娜,陈磊,闵勇,李莹,李文锋.次同步振荡中暂态能量流与电功率和阻尼转矩的关系[J].电力系统自动化,2018,42(22):52-58. |
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| 作者姓名： | 任怡娜 陈磊 闵勇 李莹 李文锋 |
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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,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,中国电力科学研究院有限公司, 北京市 100192,中国电力科学研究院有限公司, 北京市 100192 |
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| 基金项目： | 国家重点研发计划资助项目(2017YFB0902000)；国家自然科学基金资助项目(51377002)；国家电网公司科技项目“‘风火打捆’送出系统高频功率振荡扰动源定位及控制技术研究与应用” |
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| 摘 要： | 暂态能量流法是一种新的振荡分析方法，可用于多种振荡的扰动源定位和阻尼评估。文中进一步研究了其在次同步振荡中的物理意义。推导了暂态能量流与次同步功率、超同步功率之间的关系，暂态能量流的能流功率正比于超同步功率和次同步功率之差。在含串补的次同步谐振系统中，电阻可能消耗或产生暂态能量，产生暂态能量时即为负阻尼，电感和电容表现为零阻尼，但会通过改变线路电流而极大地影响电阻的阻尼特性。通过比较暂态能量流与电气子系统阻尼转矩系数，验证了上述推导的合理性。最后，在不同算例中的仿真结果验证了结论的有效性。
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| 关 键 词： | 暂态能量流 次同步振荡 超同步功率 次同步功率 阻尼转矩 |
| 收稿时间： | 2017/10/26 0:00:00 |
| 修稿时间： | 2018/5/16 0:00:00 |
Relationship Between Transient Energy Flow, Electric Power and Damping Torque in Subsynchronous Oscillation |
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| REN Yin,CHEN Lei,MIN Yong,LI Ying and LI Wenfeng.Relationship Between Transient Energy Flow, Electric Power and Damping Torque in Subsynchronous Oscillation[J].Automation of Electric Power Systems,2018,42(22):52-58. |
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| Authors: | REN Yin CHEN Lei MIN Yong LI Ying and LI Wenfeng |
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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,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 Electric Power Research Institute, Beijing 100192, China and China Electric Power Research Institute, Beijing 100192, China |
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| Abstract: | The transient energy flow method is a new method of oscillation analysis, which can be applied to the oscillation source location and damping assessment. This paper further studies its physical significance in subsynchronous oscillation. The relationship between transient energy flow, subsynchronous power and supersynchronous power is deduced. The power of energy flow is proportional to the difference between supersynchronous power and subsynchronous power. In a subsynchronous resonant system with series compensation equipment, the resistance may consume or generate transient energy, which is negative damping when the transient energy is generated. The inductance and capacitance are zero damping, but can greatly affect the damping characteristics of resistance by changing the line current. By comparing transient energy flow with the damping torque coefficient of the electrical subsystem, the rationality of above derivation is verified. Finally, the simulation results in different examples verify the validity of the conclusions. |
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| Keywords: | transient energy flow subsynchronous oscillation supersynchronous power subsynchronous power damping torque |
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