Identification and Small-Signal Analysis of Interaction Modes in VSC MTDC Systems
Identification and Small-Signal Analysis of Interaction Modes in VSC MTDC Systems
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DOI：
10.1109/pesgm.2016.7741342
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发表时间：
2016-07
影响因子：
4.4
通讯作者：
J. Beerten;S. D'arco;J. Suul
中科院分区：
文献类型：
--
作者：
J. Beerten;S. D'arco;J. Suul
本文提出了一种识别和分析电压源换流器多端高压直流（VSC MTDC）系统中换流器之间相互作用模式的方法。这种基于电力电子的系统中缺乏大量能量存储，导致系统动态快速，受电磁现象控制。此外，转换器之间的相互作用在很大程度上受到控制参数的影响，并且一般来说，基于相关时间常数的相互作用模式的先验识别不像交流系统那样简单。此外，变流器相互作用的程度不仅取决于控制器参数，还受到高压直流系统物理特性的影响。本文介绍的方法基于聚合的参与因素来区分主要与一个终端相关的本地模式和涉及多个终端的交互模式。为了说明所提出的方法，我们针对三端子 MTDC 系统研究了下垂控制参数以及直流断路器电感对系统动态以及端子参与系统交互的影响。
In this paper, a methodology is presented to identify and analyze interaction modes between converters in voltage-source converter multiterminal high-voltage direct current (VSC MTDC) systems. The absence of a substantial level of energy stored in such power-electronics-based systems results in fast system dynamics, governed by electromagnetic phenomena. Moreover, interactions between converters are largely influenced by the control parameters and, in general, an a priori identification of interaction modes based on associated time constants is less straightforward than in ac systems. Furthermore, the extent to which converters interact not only depends on the controller parameters, but is also influenced by the physical characteristics of the HVDC system. The methodology introduced in this paper is based on aggregated participation factors to distinguish between local modes, primarily associated with one terminal, and interaction modes involving multiple terminals. To illustrate the proposed methodology, the influence of droop control parameters, as well as dc breaker inductors, on the system dynamics and the participation of the terminals in system interactions are investigated for a three-terminal MTDC system.