Under-frequency load shedding scheme based on estimated inertia

被引：0
|
作者：
Wang H. [1 ]
He P. [1 ]
Jiang Y. [1 ]
Wen B. [1 ]
机构：
[1] College of Electrical Engineering and Automation, Fuzhou University, Fuzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Frequency stability; Inertia calculation; Power shor-tage; Real-time calculation; Under-frequency load shedding;
D O I：
10.16081/j.issn.1006-6047.2019.07.008
中图分类号：
学科分类号：
摘要：
Different control methods for new energy power generation access to systems will bring different influences to the inertia of system. The real-time calculation method to calculate power shortage based on estimated inertia is proposed. Firstly, the shortcomings of the existing under-frequency load shedding equipment for calculating power shortage are analyzed. In view of these shortcomings, the influence of voltage deviation on active power balance is studied, and the quantization algorithm is proposed. According to the response information of load after disturbance, a real-time method to recognize system inertia is proposed. Then, the real-time calculation method to calculate power shortage based on estimated inertia is proposed. The simulative results of islanding system in IEEE 39-bus system verify the influence of the voltage offset on the calculation of power shortage, and the veracity and validity of recognizing system inertia and calculating power shortage in real-time. Compared with the traditional round-by-round load shedding schemes, the proposed scheme has relatively small amount of load shedding and dynamic frequency offset and stronger ability of frequency recovery. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：51 / 56and63
页数：5612
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