Optimization Strategy of Hydrogovernors for Eliminating Ultralow-Frequency Oscillations in Hydrodominant Power Systems

被引：50

作者：

Chen, Gang ^{[1
]}

Tang, Fan ^{[2
]}

Shi, Huabo ^{[1
]}

Yu, Rui ^{[2
]}

Wang, Guanhong ^{[3
]}

Ding, Lijie ^{[1
]}

Liu, Baisi ^{[2
]}

Lu, Xiaonan ^{[4
]}

机构：

[1] State Grid Sichuan Elect Power Res Inst, Dept Power Syst Technol, Chengdu 610072, Sichuan, Peoples R China

[2] State Grid Corp China, Southwest Branch, Chengdu 610041, Sichuan, Peoples R China

[3] China Elect Power Res Inst, Dept Power Syst, Beijing 100096, Peoples R China

[4] Argonne Natl Lab, Energy Syst Div, Lemont, IL 60439 USA

来源：

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2018年 / 6卷 / 03期

关键词：

Correlation coefficient index; damping characteristic; governor; PID parameter optimization; ultralow-frequency oscillation (ULFO); DESIGN; PERFORMANCE; CONTROLLER;

D O I：

10.1109/JESTPE.2017.2788004

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Southwest China power grid (SCPG) and central China power grid are planned to be unsynchronized by using back-to-back voltage source converter based high voltage direct current transmission between Chongqing and Hubei power grids. After asynchronous interconnection, the proportion of hydro in installed capacity is about 70%. In other words, the SCPG is a typical hydrodominant power system. Due to the negative damping effect of governors of hydrogenerators, there is a serious risk of ultralow-frequency oscillation (ULFO) in the range of 0.05 Hz. In this paper, optimization strategies of governor for hydropower unit are presented to eliminate ULFOs. First, the control mode is selected based on comparing damping characteristic of different control modes of governor. Then, a relevant coefficient index is proposed to select sensitive generators of ULFO. Afterward, PID parameters of governor are optimized based on a new performance criteria considering the damping characteristic of governor. Finally, optimization strategies are presented and applied to SCPG. Simulation results show effectiveness and practicability of the proposed measures, which have been adopted and will be implemented before the asynchronous interconnection.

引用

页码：1086 / 1094

页数：9

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