| 引用本文: | 宫 璇,刘涤尘,董 超,廖清芬,王 波,洪 敏.基于能量函数的低频振荡新型预警指标[J].电力自动化设备,2013,33(1): |
| GONG Xuan,LIU Dichen,DONG Chao,LIAO Qingfen,WANG Bo,HONG Min.Early warning indicator of low frequency oscillation based on energy function[J].Electric Power Automation Equipment,2013,33(1): |
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| 摘要: |
| 提出可用于实际分析的断面潮流分析模型，通过选择观测断面，将对全网的分析转化为对每个观测断面的分析，从而实现全网的分散解耦分析。在该模型的基础上，简化了基于惯性中心的传统能量函数，对传统的稳定裕度指标进行改进，提出了稳定裕度增量指标，该指标建立于电力系统联络线观测断面的基础上，计算简单方便，可对多重扰动下的低频振荡进行预警，且能应用于扰动严重性的判断。New England 10机系统和实际系统的仿真算例验证了该方法的有效性。 |
| 关键词: 电力系统 低频振荡 多重扰动 能量函数 预警指标 稳定裕度增量 稳定性 |
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| 基金项目:国家自然科学基金资助项目（51077103）；国家高技术研究发展计划（863计划）（2011AA05A119）；国家电网公司大电网重大专项资助项目（SGCC-MPLG029-2012） |
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| Early warning indicator of low frequency oscillation based on energy function |
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GONG Xuan, LIU Dichen, DONG Chao, LIAO Qingfen, WANG Bo, HONG Min
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School of Electrical Engineering，Wuhan University，Wuhan 430072，China
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| Abstract: |
| The practical analysis model of sectional power flow is proposed to realize the dispersive and decoupling analysis of whole power network. The observation sections of power network are properly selected and the power flow analysis is carried out for each observation section. The traditional energy function based on inertia centre is simplified and the stability margin increment indicator，instead of the traditional stability margin indicator，is proposed which，based on the tie-line observational section of power system，can be easily calculated and used as the seriousness criterion of disturbance and the early warning of low frequency oscillation under multi-disturbance. Its validation is verified by the simulations for New England 10-machine system and actual system. |
| Key words: ：electric power systems low frequency oscillation multi-disturbance energy function early warning indicator stability margin increment stability |
