VSC transmission operating under unbalanced AC conditions - analysis and control design
VSC transmission operating under unbalanced AC conditions - analysis and control design
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DOI：
10.1109/tpwrd.2004.835032
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发表时间：
2005-02
影响因子：
4.4
通讯作者：
Lie Xu;B. Andersen;P. Cartwright
中科院分区：
文献类型：
--
作者：
Lie Xu;B. Andersen;P. Cartwright
本文提出了一种新的电压源换流器（VSC）传输系统在不平衡网络条件下运行的分析和控制设计。在正负同步坐标系下对系统进行了分析。所提出的控制策略包括一个主控制器和一个辅助控制器。主控制器在正d-q坐标系下采用解耦控制实现，不涉及正/负序分解。辅助控制器在负序d-q坐标系下实现，采用负序电流交叉耦合控制。使用SIMULINK电力系统模块集的仿真结果表明，所提出的控制策略的300 MW 300 kV直流VSC传输系统在平衡条件和不平衡条件下，可能会造成一个固体单相接地故障的良好性能。
This work presents an analysis and a new control design of a voltage-source converter (VSC) transmission system operating under unbalanced network conditions. The system is analyzed in the positive and negative synchronous reference frames. The proposed control strategy contains a main controller and an auxiliary controller. The main controller is implemented in the positive d-q frame using decoupling control without involving positive/negative-sequence decomposition. The auxiliary controller is implemented in the negative-sequence d-q frame using cross-coupling control of negative-sequence current. Simulation results using the SIMULINK power system blockset show good performance of the proposed control strategy for a 300-MW 300-kV dc VSC transmission system during both balanced conditions and unbalanced conditions as may be caused by a solid single-phase-to-ground fault.