基于同步功率控制的模块化多电平变换器的电网支持功能

2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA) Pub Date : 2016-11-01 DOI:10.1109/ICRERA.2016.7884399

Cristian Verdugo, J. I. Candela, P. Rodríguez

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引用次数: 20

摘要

高压直流输电网络是模块化多电平变换器应用最广泛的系统之一。大型互联系统的稳定性改进是必不可少的，这方面的研究主要集中在交流系统中，而在直流网络中还处于发展阶段。本文提出了一种采用模块化多电平变换器(MMC)实现的高压直流输电系统中支持电网抗扰动的控制策略。这项工作背后的主要思想是用一种新的控制策略取代经典的功率控制器，该策略模拟了同步发电机的特性。所提出的控制被称为同步功率控制(SPC)，它能够模拟电网所需的惯性、阻尼和下垂特性。为了验证这一工作，给出了连接弱电网的HVDC-MMC系统的仿真结果。

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Grid support functionalities based on modular multilevel converters with synchronous power control

High voltage direct current (HVDC) transmission networks is one of the most interesting systems for the application of modular multilevel converters. Stability improvement of large interconnected systems is essential which has been largely studied in AC systems but still under development in DC networks. This paper presents a control strategy to provide support to the grid against disturbance in a HVDC system implemented with a modular multilevel converter (MMC). The main idea behind this work is to replace the classical power controller by a new control strategy, which emulates the characteristics of a synchronous generator. The control proposed is known as Synchronous Power Control (SPC) and it is able to emulate inertia, damping and droop characteristics required by the grid. To validate this work, simulation results are presented in a HVDC-MMC system connected to a weak grid.

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2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)

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