海上风电经柔直并网系统故障穿越协调控制策略  

A coordinated control strategy for fault ride-through of offshore wind farm via VSC-HVDC

作　　者：张照辉 谢志远 付慧 徐阳 赵科 郭俊[2] 刘建军 ZHANG Zhaohui;XIE Zhiyuan;FU Hui;XU Yang;ZHAO Ke;GUO Jun;LIU Jianjun(Electric Power Research Institute of State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211103,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,江苏南京211103 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电能新技术》2024年第5期28-37,共10页Advanced Technology of Electrical Engineering and Energy

基　　金：国家电网公司科技项目(J2022012)。

摘　　要：本文分析了分布式直流耗能装置的拓扑结构、参数设计和控制策略,并对其控制策略进行改进,通过对比传统耗能装置、分布式耗能装置和采用改进控制策略的分布式耗能装置三者的响应曲线,表明采用改进控制策略的分布式耗能装置具有耗能曲线平滑、故障穿越(FRT)性能优越的特点。在此基础上,针对传统故障穿越策略存在的直流耗能装置成本较高的问题,基于永磁直驱式风电机组设计降压法,在故障发生时主动降低风电场的输出功率,并结合采用改进控制策略的分布式耗能装置设计FRT协调控制策略,能够显著降低耗能装置容量,在确保系统故障穿越性能的前提下降低系统造价。基于如东海上风电柔性直流输电工程的实际参数,在PSCAD/EMTDC中建立系统模型,对提出的协调控制策略的有效性进行了验证。This paper analyzes the topology,parameter design and control strategy of the distributed DC chopper and improves its control strategy.By comparing the response curves of the traditional DC chopper,the distributed DC chopper and the distributed DC chopper with the improved control strategy,it is shown that the distributed DC chopper with the improved control strategy has a smooth energy consumption curve and better fault ride-through(FRT)performance.On this basis,to address the problem of high cost of DC chopper with traditional FRT strategy,the AC-voltage magnitude reduction method is designed based on the permanent magnet direct-drive wind turbine to actively reduce the output power of the wind farm when a fault occurs,and the FRT coordination control strategy is designed in combination with the distributed DC chopper using the improved control strategy,which can significantly reduce the capacity of DC chopper and the cost of system while ensuring FRT performance of system.Based on the actual parameters of the Rudong offshore wind via VSC-HVDC project,the effectiveness of the proposed coordinated control strategy is verified by establishing the system model in the PSCAD/EMTDC.

关 键 词：海上风电场 柔性直流输电 故障穿越 分布式直流耗能装置 控制方法 降压法 协调控制 

分 类 号：TM743[电气工程—电力系统及自动化]