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

Author:

Xing Chao1,Liu Mingqun1,Peng Junzhen1,Wang Yuhong2ORCID,Shang Chengbo2,Zheng Zongsheng2,Liao Jianquan2,Gao Shilin2

Affiliation:

1. Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650217, China

2. College of Electrical Engineering, Sichuan University, Chengdu 610065, China

Abstract

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.

Funder

National Natural Science Foundation of China

Project of State Key Laboratory of Power System Operation and Control

Fundamental Research Funds for the Central Universities

Publisher

MDPI AG

Reference18 articles.

1. Input-output linearization and robust sliding-mode controller for the VSC-HVDC transmission link;Akshaya;IEEE Trans. Power Deliv.,2010

2. Unbalanced power optimal distribution control strategy for multi-terminal flexible straight network suitable for offshore wind power access;Deng;Proc. CSEE,2020

3. Multi-objective bi-level optimization design method of DC frequency limiting controller parameters;Wang;Electr. Power Autom. Equip.,2022

4. A comprehensive power flow approach for multi-terminal VSC-HVDC system considering cross-regional primary frequency responses;Ye;J. Mod. Power Syst. Clean Energy,2020

5. Adaptive frequency modulation control strategy for asynchronous connected HVDC transmission system adapted to wind power access;Wang;Electr. Power Autom. Equip.,2023

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