Application of gate‐controlled series capacitor to mitigate subsynchronous resonance in a thermal generation plant connected to a series‐compensated transmission network,International Transactions on Electrical Energy Systems

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Application of gate‐controlled series capacitor to mitigate subsynchronous resonance in a thermal generation plant connected to a series‐compensated transmission network
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2020-10-13 , DOI: 10.1002/2050-7038.12673
Ali Akbar Emarloo ₁ , Mahmudreza Changizian ₁ , Abbas Shoulaie ₁

Affiliation

This paper demonstrates the functionality and control of the gate‐controlled series capacitor (GCSC), a new FACTS device composing a pair of antiparallel GTOs in parallel with a fixed capacitor, to mitigate subsynchronous resonance (SSR) in a thermal generation plant connected to a series compensated transmission line. Firstly, by the use of both small‐signal stability analysis and time‐domain simulation, it is revealed that the studied system compensated by the series fixed capacitor is potentially unstable due to the first torsional mode. Then, in order to take benefits of series compensation without the risk of SSR, the fixed capacitor is replaced by GCSC. The capability and effectiveness of the GCSC to damp SSR are validated using modal analysis and time‐domain simulation. Furthermore, GCSC is used in conjunction with a fixed series capacitor to minimize the overall cost of compensation. For this purpose, unlike previous studies, a linear controller is used to stabilize the system. In this study, the IEEE First Benchmark Model is considered as a case study, and MATLAB/Simulink is used as a tool for modeling and design of the control system. Also, time‐domain simulations are done using PSCAD/EMTDC.

中文翻译：

在连接到串联补偿传输网络的热电厂中，应用门控串联电容器来减轻次同步谐振

本文演示了栅极控制串联电容器（GCSC）的功能和控制，这是一种新型FACTS装置，由一对反并联GTO与固定电容器并联构成，以减轻与发电厂连接的热电厂的次同步谐振（SSR）。串联补偿传输线。首先，通过同时使用小信号稳定性分析和时域仿真，发现由串联固定电容器补偿的所研究系统由于第一扭转模式而可能不稳定。然后，为了在没有SSR风险的情况下利用串联补偿的优势，将固定电容器替换为GCSC。使用模态分析和时域仿真验证了GCSC阻尼SSR的能力和有效性。此外，GCSC与固定串联电容器配合使用，以最大程度地降低总补偿成本。为此，与以前的研究不同，使用线性控制器来稳定系统。在本研究中，以IEEE First Benchmark模型为案例研究，并使用MATLAB / Simulink作为控制系统建模和设计的工具。另外，时域仿真是使用PSCAD / EMTDC完成的。

更新日期：2020-12-07

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