电力系统小干扰稳定实时风险评估方法

doi:10.11930/j.issn.1004-9649.2014.5.39.4

中国电力 ›› 2014, Vol. 47 ›› Issue (5): 39-43.DOI: 10.11930/j.issn.1004-9649.2014.5.39.4

电力系统小干扰稳定实时风险评估方法

施琳¹，罗毅¹，朱益华¹，段涛¹，李晓露²，熊卫斌³，李矛³

1. 华中科技大学电气与电子工程学院，湖北武汉 430074;
2. 阿尔斯通电网企业管理（上海）有限公司，上海 201114;
3. 南方电网公司，广东广州 510623

收稿日期:2014-02-12 出版日期:2014-05-31 发布日期:2015-12-21
作者简介:施琳（1988-），男，安徽池州人，博士研究生，从事电力系统风险评估、新能源接入技术的研究。E-mail: shilinchina@126.com
基金资助:
南方电网公司重点科技资助项目（K-ZB2011-012）

Real-Time Risk Assessment Method of Small Signal Stability of Power Systems

SHI Lin¹, LUO Yi¹, ZHU Yi-hua¹, DUAN Tao¹, LI Xiao-lu², XIONG Wei-bin³, LI Mao³

1. School of Electrical & Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. Alstom Grid Enterprise Management (Shanghai) Co., Ltd., Shanghai 201114, China;
3. China Southern Power Grid Co., Guangzhou 510623, China

Received:2014-02-12 Online:2014-05-31 Published:2015-12-21
Supported by:
This work is supported by Science and Technology Key Project of China Southern Power Grid (K-ZB2011-012)

摘要/Abstract

摘要： 为实时反映当前电力系统小干扰稳定性状况，建立了小干扰稳定性实时风险评估指标，提出了电力系统小干扰稳定实时风险评估方法。评估模型中，在当前运行状态或者关键线路N-1状态下，利用特征值分析方法，以阻尼比0.05作为阈值判断小干扰稳定性;计及输电线路实时故障率计算关键线路N-1状态下小干扰失稳概率。在小干扰失稳后果评估中，利用参与因子筛选调整节点，以控制代价最小化为目标，依据阻尼比灵敏度，迭代计算调整节点控制量，最终协调所有弱阻尼振荡模式控制量，生成综合优化控制方案，计算控制代价作为后果指标;以华中电网某一时间断面的数据为例，验证了该风险评估方法的有效性。

关键词: 电力系统, 实时风险评估, 小干扰稳定, 阻尼比, 优化控制方法

Abstract: In order to get a real-time reflecting of small signal stability of power systems, a set of indices of real-time risk assessment is given, and a real-time risk assessment method of small signal stability of power system is proposed, in which the damping ratio of 0.05 is chosen as the threshold value to judge small signal stability in a modal analysis under current or N-1 status. In addition, the model for real-time failure rates of power transmission lines is used to calculate small signal instability probability under N-1 status. According to the sensitivity analysis of damping ratios, the controlled quantities of the nodes selected by participation factors, are iteratively calculated with the objective of minimizing control cost. The comprehensive and optimized control scheme is generated by coordinating the controlled quantities of all poorly-damped oscillatory modes and the scheme’s cost is taken as the index to evaluate the consequence. Finally, an example based on the data about Central China Power Grid operation and the local weather in a certain time section was taken to prove the effectiveness of the method mentioned above.

Key words: power system, real-time risk assessment, small signal stability, damping ratio, optimized control method

中图分类号:

TM712

施琳，罗毅，朱益华，段涛，李晓露，熊卫斌，李矛. 电力系统小干扰稳定实时风险评估方法[J]. 中国电力, 2014, 47(5): 39-43.

SHI Lin, LUO Yi, ZHU Yi-hua, DUAN Tao, LI Xiao-lu, XIONG Wei-bin, LI Mao. Real-Time Risk Assessment Method of Small Signal Stability of Power Systems[J]. Electric Power, 2014, 47(5): 39-43.

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https://www.electricpower.com.cn/CN/Y2014/V47/I5/39

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电力系统小干扰稳定实时风险评估方法

Real-Time Risk Assessment Method of Small Signal Stability of Power Systems

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电力系统小干扰稳定实时风险评估方法

Real-Time Risk Assessment Method of Small Signal Stability of Power Systems

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