文章研究提出了一种光伏全直流汇集与送出系统高压直流侧故障穿越策略，可在故障态无需即时通信实现光伏发电功率和高压直流变压器传输功率的平衡。

图1 光伏全直流汇集与送出系统架构

当高压直流侧发生故障后，因输入输出功率不平衡，高压直流变压器高压侧子模块的电压升高，所提策略主动增加中压侧投入的子模块总数以提升中压直流电压，配合具有故障态P-V下垂特性的MPPT装置，实现子模块未过压情况下MPPT进入限功率模式，高压直流变压器端口功率平衡，可降低子模块过压、完成故障穿越。

            

（a）MPPT装置P-V下垂策略                 （b）高压DCT主动电压抬升策略

本文研究分为三部分。首先，简要回顾了光伏全直流汇集与送出系统架构以及高压直流变压器拓扑方案；然后，分析了全直流汇集与送出系统故障穿越中存在的问题，进而研究提出了结合光伏P-V下垂和高压直流变压器主动电压抬升的故穿越策略；最后，搭建了±200kV/±20kV/1.5kV的光伏全直流汇集与送出系统模型进行了仿真验证。

支持基金：

国网浙江省电力有限公司项目(5211DS230005)

论文链接：

http://www.motor-abc.cn/djykzyy/article/abstract/20240403

推荐引用格式：

SHI Xinghua, ZHANG Xueyin, GAN Chun, MA Yiqing, WEN Xudong, DUAN Jinpei, ZHAO Biao. Fault Ride-Through Strategy for PV Full DC Collection and Transmission System Based on Active Voltage Rising Method[J].  Electric Machines & Control Application, 2024, 51(4): 20-28.

Shi Xinghua, senior engineer, graduated from Shanghai Jiao Tong University with master degree in Power System and Automation. He is currently the Vice General Manager and Party Committee Member of State Grid Zhejiang Electric Power Co., Ltd. He serves as the Chairman of Zhejiang Electric Power Society and the Vice President of State Grid Zhejiang University Smart Power Energy Research Institute. He has long been engaged in power grid planning, construction, operation, and scientific research management, and has made multiple original contributions in theoretical research, equipment development, engineering applications, and has won multiple provincial and ministerial level scientific and technological awards. He has extensive experience in managing overseas power grid companies and has served as a senior executive and executive director of power grid companies in Australia and Greece.

Since joining the work in 1990, he has actively served the development planning and scientific and technological innovation work in the field of electrical engineering, led and promoted the planning of key projects such as Gansu-Zhejiang ± 800kV HVDC, organized and implemented a number of national key research and development projects, organized and promoted the construction of science and technology demonstration projects such as low-frequency transmission, hydrogen electricity coupling, prefecture level and city level global zero carbon energy Internet, coordinated and hosted academic activities such as the 2020 World Summit of Young Scientists Future Energy Forum, the 2020 Forum on the Construction of Multi integrated High elastic Power Grid, and the 2022 China Green Low Carbon Innovation Conference.