Cooperative Control of FFM-CSC Using Positive and Negative Trigger Angle for Offshore Wind Power Transmission

IF 3.8 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Delivery Pub Date : 2025-03-27 DOI:10.1109/TPWRD.2025.3555254

Dingteng Feng;Xiaoling Xiong;Chenhao Yao;Zihan Zhou;Chengyong Zhao

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Abstract

The current source converter (CSC) is a competitive solution for offshore wind grid integration. The fundamental frequency modulation-based current source converter (FFM-CSC) effectively solves the shortcomings of pulse width modulation CSC (PWM-CSC), in which DC voltage ripple is drastic and electrical stresses are high. The independent control of offshore AC voltage and frequency requires two degrees of control freedom for the converter. Nevertheless, this is not possible for the FFM-CSC since it has single control degree of freedom. To solve this problem, a positive and negative trigger angle cooperative control method is developed for CSC-HVDC connected offshore wind farms. The positive and negative trigger angles of the high and low valves are adopted to stabilize the offshore AC grid and achieve independent control of voltage amplitude and frequency. Next, by exploring the monotonicity of the offshore voltage amplitude and frequency, the laws affecting the control objectives were analyzed. Then, the AC fault characteristics are analyzed, whilst the ride-through methods are investigated accordingly. Finally, experimental prototypes and simulation models are built to confirm the designed control strategy and fault ride-through mechanism.

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基于正负触发角的FFM-CSC海上风电传输协同控制

电流源变流器（CSC）是海上风电并网的一种有竞争力的解决方案。基于基频调制的电流源变换器（FFM-CSC）有效地解决了脉宽调制型电流源变换器（PWM-CSC）直流电压纹波大、电应力大的缺点。海上交流电压和频率的独立控制要求变流器有两个控制自由度。然而，这对于FFM-CSC来说是不可能的，因为它具有单一的控制自由度。针对这一问题，提出了一种CSC-HVDC并网海上风电场的正、负触发角协同控制方法。采用高低阀的正负触发角稳定海上交流电网，实现电压幅值和频率的独立控制。其次，通过考察近海电压幅值和频率的单调性，分析了影响控制目标的规律；然后，分析了交流故障的特点，并研究了相应的穿越方法。最后，建立了实验样机和仿真模型，验证了所设计的控制策略和故障穿越机制。

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

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.