基于二极管整流单元的海上风电柔性低频送出系统黑启动策略  

Black Start Strategy of Diode Rectifier Unit Based Flexible Low-frequency Transmission System for Offshore Wind Power

作　　者：黄莹[1] 黄小威 肖晃庆 刘涛 HUANG Ying;HUANG Xiaowei;XIAO Huangqing;LIU Tao(Department of Electric Engineering,Zhejiang University,Hangzhou 310027,China;School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,China;State Key Laboratory of HVDC,Electric Power Research In-stitute of China Southern Power Grid Company Limited,Guangzhou 510663,China)

机构地区：[1]浙江大学电气工程学院,杭州310027 [2]华南理工大学电力学院,广州510641 [3]直流输电技术全国重点实验室(中国南方电网科学研究院有限责任公司),广州510663

出　　处：《高电压技术》2025年第1期346-355,I0039,共11页High Voltage Engineering

基　　金：广州市科技计划项目(202201010694);中央高校基本科研业务费专项资金(2022ZYGXZR050)。

摘　　要：在基于二极管整流单元(diode rectifier unit,DRU)的海上风电柔性低频送出系统中,DRU无法向海上风电场传输有功功率,需要额外的黑启动电源为风电机组提供启动所需的初始能量。为此,提出了一种采用辅助换流器作为黑启动电源的海上风电柔性低频送出系统黑启动策略。首先,介绍了基于DRU的海上风电柔性低频送出系统的拓扑结构与风电机组稳态时的构网型控制策略。然后,基于上述控制策略设计了辅助换流器与风电机组的黑启动策略。在此基础上,分析了辅助换流器容量的选择方法。最后,在时域仿真软件PSCAD/EMTDC上搭建了相应的仿真模型,对系统的黑启动过程进行仿真,仿真中海上风电场所有电气量均能平稳达到正常运行前的状态。仿真结果表明,所提黑启动策略可以实现基于DRU的海上风电柔性低频送出系统的平滑启动。In a DRU(diode rectifier unit)-based flexible low-frequency AC transmission system of offshore wind power,DRU cannot transmit active power to the offshore wind farm,and the system requires an additional black start power source to provide initial start-up energy for wind turbines.For this reason,a black start strategy using auxiliary converter as black start power source for the above system is proposed.Firstly,the topology structure of DRU-based flexible low-frequency AC transmission system and the grid forming control strategy adopted by wind turbines are introduced.Then,based on the above control strategy,the black start strategy of auxiliary converter and wind turbines are designed.On the basis of the above strategies,the selection method for auxiliary converter capacity is analyzed.Finally,a corre-sponding simulation model is built on the PSCAD/EMTDC software to simulate the black start process of the system,and all electrical quantities can smoothly reach the normal operation state.The simulation results show that the black start strategy proposed in this paper can realize the smooth start of the DRU-based flexible low-frequency AC transmission system of offshore wind power.

关 键 词：海上风电 低频交流输电 二极管整流单元 辅助换流器 构网型风电机组 黑启动 

分 类 号：TM614[电气工程—电力系统及自动化]