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Fast Fault Recovery Technique for Monopolar HVDC Systems Based on New Control Strategy

机译：基于新控制策略的单极高压直流输电系统快速故障恢复技术

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摘要

This paper presents a new fast control strategy method for enhancing the fault-ride-through performance of monopolar high voltage direct current systems in case of a DC line fault. The proposed method is solely based on a novel control strategy algorithm, which will be functional after detecting the DC internal faults. The new control method is able to prevent the DC voltage from becoming negative during the force alpha period and is also able to exceed the recovery speed of the system by switching the controlling method from current controller to gamma controller during the recovery process. These two facts are the main ideas behind the new control strategy that will improve the recovery process of the system by a great margin. To evaluate the reliability of the proposed method, the Hydro-Quebec monopolar high voltage direct current test system using MATLAB/SIMULINK environment is used. It will be shown that the proposed method is not only functional for recovering the system in case of any DC fault occurrence but also more economical and well applicable on the existing high voltage direct current networks.
机译：本文提出了一种新的快速控制策略方法，用于在直流线路发生故障的情况下提高单极高压直流系统的故障穿越性能。所提出的方法仅基于一种新颖的控制策略算法，该算法将在检测到直流内部故障后起作用。通过在恢复过程中将控制方法从电流控制器切换到伽马控制器，新的控制方法能够防止在作用力α期间DC电压变为负值，并且还可以超过系统的恢复速度。这两个事实是新控制策略背后的主要思想，它将极大地改善系统的恢复过程。为了评估该方法的可靠性，使用了基于MATLAB / SIMULINK环境的Hydro-Quebec单极高压直流测试系统。可以看出，所提出的方法不仅具有在发生任何直流故障的情况下恢复系统的功能，而且更经济并且可以很好地应用于现有的高压直流网络。

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