Frequency Stability Control Strategy for Voltage Source Converter-Based Multi-Terminal DC Transmission System

被引：2

作者：

Xing, Chao ^{[1
]}

Liu, Mingqun ^{[1
]}

Peng, Junzhen ^{[1
]}

Wang, Yuhong ^{[2
]}

Shang, Chengbo ^{[2
]}

Zheng, Zongsheng ^{[2
]}

Liao, Jianquan ^{[2
]}

Gao, Shilin ^{[2
]}

机构：

[1] Elect Power Res Inst Yunnan Power Grid Co Ltd, Kunming 650217, Peoples R China

[2] Sichuan Univ, Coll Elect Engn, Chengdu 610065, Peoples R China

来源：

ENERGIES | 2024年 / 17卷 / 05期

基金：

中国国家自然科学基金;

关键词：

frequency stability; VSC-MTDC; additional frequency control; fuzzy logic control; adaptive modulation;

D O I：

10.3390/en17051195

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The voltage source converter-based multi-terminal DC transmission (VSC-MTDC) system can use additional frequency control to respond to the frequency change of faulty AC system. However, the control coefficient of traditional additional frequency control is mostly fixed, and the control flexibility is insufficient, so it cannot be adjusted adaptively according to the frequency change of the system. Therefore, a frequency control strategy of the VSC-MTDC system based on fuzzy logic control is proposed. Based on the DC voltage slope controller, this strategy introduces an additional frequency controller based on fuzzy logic control, takes the frequency deviation and frequency change rate as the additional controller input, and dynamically adjusts the control quantity through the fuzzy logic control link to realize the adaptive adjustment of the VSC-MTDC system to the AC system's frequency. Finally, a three-terminal flexible HVDC system is built on the PSCAD/EMTDC simulation platform for simulation verification. The results show that the proposed control strategy can effectively use the flexible DC system to support the frequency of the AC system and significantly improve the frequency stability of the faulty AC system.

引用

页数：15