The Influence of Additional Virtual Synchronous Generator Technology in VSC-MTDC Systems with Wind Power on System Frequency

Q3 Engineering

Recent Patents on Engineering Pub Date : 2024-02-26 DOI:10.2174/0118722121294488240223075517

Congshan Li, Kefeng Zhao, Ping He, Zikai Zhen

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引用次数: 0

Abstract

A frequency control strategy is proposed based on additional virtual synchronous generator technology for voltage source converter-based multi-terminal high voltage direct current systems with wind power. This strategy addresses the system's inertia reduction and frequency stability issues caused by integrating large amounts of wind power through multi-terminal DC transmission. Firstly, the virtual synchronous generator mathematical model is constructed based on the system structure. Secondly, for the problem of zero rotational inertia of voltage source converter in a flexible DC transmission system, based on the P-U droop control method of the converter station, additional virtual synchronous control generation technology is applied to simulate the P-f droop characteristics of the synchronous generator by adding virtual rotational inertia, so that the converter has the inertial response of synchronous generator to realize primary frequency regulation. Finally, the simulation is verified on the PSCAD/ EMTDC platform with an example of a three-terminal parallel MTDC transmission system. the analyzed results demonstrate that the virtual synchronous generator control strategy is very valuable and useful for improving the frequency performance of the system.

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带风电的 VSC-MTDC 系统中附加虚拟同步发电机技术对系统频率的影响

针对基于电压源换流器的多端高压直流风力发电系统，提出了一种基于附加虚拟同步发电机技术的频率控制策略，以解决通过多端直流输电集成大量风力发电所带来的系统惯性减小和频率稳定问题。首先，根据系统结构构建虚拟同步发电机数学模型。其次，针对柔性直流输电系统中电压源换流器零转动惯量的问题，在换流站 P-U 下垂控制方法的基础上，采用附加虚拟同步控制生成技术，通过增加虚拟转动惯量来模拟同步发电机的 P-f 下垂特性，使换流器具有同步发电机的惯性响应，从而实现一次调频。最后，以三端并联 MTDC 输电系统为例，在 PSCAD/ EMTDC 平台上验证了仿真结果。

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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来源期刊

Recent Patents on Engineering Engineering-Engineering (all)

CiteScore

1.40

自引率

0.00%

发文量

100

期刊介绍： Recent Patents on Engineering publishes review articles by experts on recent patents in the major fields of engineering. A selection of important and recent patents on engineering is also included in the journal. The journal is essential reading for all researchers involved in engineering sciences.