Using Virtual Synchronous Generator Control Based Energy Storage to Enhance the Stability of Sending Terminal in LCC-HVDC System

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI:10.1109/HVDC50696.2020.9292899

Baomin Fang, Y. Jiao, Ling Dong, W. Zhou, H. Nian

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引用次数: 6

Abstract

This paper uses the virtual synchronous generator (VSG) control based energy storage to enhance the stability of sending terminal in line line-commutated converter (LLC) based high voltage direct current (HVDC) transmission systems. LCC-HVDC are widely utilized in China to transmit renewable power generation from western area to the east in thousands kilometers distance. However, the reports of stability about HVDC and renewable power generation occur in recent decades. Based on the impedance theory, this paper analyzes the small signal stability of HVDC sending terminal. Recently, because of flexibility and functionality of supporting grid, power electronics based energy storage is attracting a wide-spread attention. The impedance model of virtual synchronous generator control (VSG) based energy storage is introduced in this manuscript. The impedance analysis indicates that the VSG based energy storage can improve the stability of HVDC sending terminal. Based on the impedance model, the capacity of energy storage is also analyzed. To illustrate the correctness and effectiveness of impedance analysis, the simulation results are given in the manuscript.

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采用基于虚拟同步发电机控制的储能技术提高LCC-HVDC系统发送端稳定性

本文采用基于虚拟同步发电机(VSG)控制的储能技术来提高基于线路换向变换器(LLC)的高压直流输电系统的发送端稳定性。LCC-HVDC在中国广泛应用，将可再生能源发电从西部地区输送到东部数千公里的距离。然而，关于高压直流和可再生能源发电稳定性的报道是近几十年来才出现的。基于阻抗理论，分析了高压直流输电终端的小信号稳定性。近年来，基于电力电子技术的储能由于其支撑电网的灵活性和功能性而受到广泛关注。本文介绍了基于储能的虚拟同步发电机控制系统的阻抗模型。阻抗分析表明，基于VSG的储能可以提高直流输电终端的稳定性。在阻抗模型的基础上，分析了储能容量。为了说明阻抗分析的正确性和有效性，文中给出了仿真结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 4th International Conference on HVDC (HVDC)

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