Stability improvement of simultaneous AC-DC power transmission system

2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE) Pub Date : 2016-12-01 DOI:10.1109/ICECTE.2016.7879613

M. Rahman, M. Sheikh, Md. Alimul Islam Salim

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引用次数: 2

Abstract

This paper presents the concept of simultaneous ac-dc power transmission system with newly designed self adaptive Voltage Dependent control (VDCOL) procedure. Long ac transmission lines cannot be loaded to their thermal limits due to instability occurs in the power system. It is difficult to load long ac lines to their thermal limits as a sufficient margin is kept against transient instability. With the model proposed in this thesis, it will be possible to load these lines close to their thermal limits. The transmission lines and the conductors are allowed to carry usual ac along with dc superimposed on it. This thesis with newly designed controller gives us the feasibility of composite ac-dc power transmission line to get the advantages of parallel ac-dc transmission in order to transient stability and dynamic stability and dampen out oscillations. Simulation has been carried out during 1-phase and 3-phase fault in MATLAB software package (Simulink) to prove system stability enhancement.

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交直流同步输电系统的稳定性改进

本文采用新设计的自适应电压相关控制(VDCOL)程序，提出了交直流同步输电系统的概念。由于电力系统不稳定，长交流输电线路不能负荷到其热极限。将长交流线路加载到其热极限是困难的，因为要保持足够的余量以防止瞬态不稳定。利用本文提出的模型，将有可能将这些线路加载到接近其热极限的地方。传输线和导体允许携带普通的交流电和叠加在上面的直流电。本文结合新设计的控制器，给出了复合交直流输电线路的可行性，以获得并联交直流输电的暂态稳定性、动态稳定性和抑制振荡的优势。在MATLAB软件包(Simulink)中对单相和三相故障进行了仿真，验证了系统稳定性的增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE)

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