混合型海上风电直流换流器的拓扑优化与控制  

Topology Optimization and Control of the Hybrid DC Converter for Offshore Wind Farms

作　　者：方梓熙 蔡旭[1] 史先强 查鲲鹏 曹均正 饶芳权 FANG Zixi;CAI Xu;SHI Xianqiang;ZHA Kunpeng;CAO Junzheng;RAO Fangquan(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education(Shanghai Jiao Tong University).Minhang District,Shanghai 200240,China;China EPRI Science&Technology Co.,Ltd.,Changping District,Beijing 102200,China)

机构地区：[1]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市闵行区200240 [2]中电普瑞电力工程有限公司,北京市昌平区102200

出　　处：《中国电机工程学报》2021年第24期8546-8559,共14页Proceedings of the CSEE

基　　金：国家电网有限公司科技项目(520940200010)。

摘　　要：模块化多电平变换器(modular multilevel converter,MMC)由于其子模块数量多、体积与重量大,用于海上直流输电时建设成本高昂。针对这一问题,该文对辅助换流器与二极管整流器并联混合直流送出的系统进行研究,介绍混合换流器的运行方式,并提出一种新型的辅助换流器拓扑结构,分析运行原理,推导相应的数学模型,基于数学模型给出控制策略与参数设计方法。所提混合换流器相比MMC换流器,能够显著降低海上换流站的建设成本,并提高效率。最后,通过仿真与硬件在环实验验证混合换流器拓扑及其控制的有效性。The construction cost of the modular multilevel converter(MMC) of the offshore dc transmission system is relatively high, due to the large number of the submodules and the large size and weight of MMC. To address this problem,this paper studied the hybrid dc transmission system with auxiliary converter and diode rectifier connected in parallel and introduced the operation principle of the hybrid converter. A novel topology of the auxiliary converter was proposed. The operation principle was analyzed systematically and the mathematical model was given. Based on the mathematical model, the control and parameter design method of the auxiliary converter were also proposed. Comparing with the MMC, the construction cost of the offshore converter station is significantly reduced and the system efficiency is improved.Then the feasibility of the topology and control of the hybrid converter is verified through the simulation and the hardware-in-loop experiment.

关 键 词：柔性直流输电 海上风场 二极管整流器 模块化多电平变换器 混合换流器 

分 类 号：TM46[电气工程—电器]