LCC-VSC型混合直流输电系统及其控制策略  

LCC-VSC Hybrid DC Power Transmission System and Its Control Strategy

作　　者：王振[1,2] 肖凯 谢文杰 郭研研 WANG Zhen;XIAO Kai;XIE Wen-jie;GUO Yan-yan(Maintenance&Test Center of CSG EHV Power Transmission Company,Guangzhou 510620,China)

机构地区：[1]中国南方电网超高压输电公司检修试验中心,广东广州510620 [2]直流输电装备与海底电缆安全运行联合实验室,广东广州510620 [3]特变电工西安柔性输配电有限公司,陕西西西安710000

出　　处：《电力电子技术》2023年第10期97-100,共4页Power Electronics

基　　金：中国南方电网有限责任公司重点科技项目(CGYKJXM20200332)。

摘　　要：基于相控变流器的高压直流(LCC-HVDC)和电压源变流器的高压直流(VSC-HVDC)共同组建由电压源变流器(VSC)和相控变流器(LCC)组成的混合HVDC输电系统,可有效实现对两种HVDC输电技术的优势互补。此处设计了由VSC整流器和LCC逆变器组成的双端混合HVDC输电系统拓扑结构,分别给出了VSC整流器和LCC逆变器系统模型及详细控制策略,建立了基于RTDS硬件在环的混合HVDC输电系统实验平台。实验结果表明:在所设计的混合HVDC输电系统中,两端变流器可以独立调节直流系统的传输功率;当发生直流侧短路故障时,该系统能够及时响应,并在故障清除后快速恢复正常运行。证明了所设计的混合HVDC输电系统及其控制策略是可行的、可靠的。A hybrid HVDC power transmission system composed of voltage source converters(VSC)and phase controlled converters(LCC)based on phase controlled converters-HVDC(LCC-HVDC)and voltage source converters-HVDC(VSC-HVDC)can effectively realize the complementary advantages of the two HVDC power transmission technologies.The topological structure of two-terminal hybrid HVDC power transmission system composed of VSC rectifier and LCC inverter is designed,and the system model and detailed control strategy of VSC rectifier and LCC inverter are respectively given,and the experimental plaform of hybrid HVDC power transmission system based on RTDS hardware in the loop is established.The experimental results show that in the designed hybrid HVDC power transmission system,the converters at both ends can independently adjust the transmission power of the DC system,when a DC short-circuit fault occurs,the system can respond in time and recover quickly after the fault is rectified.It is proved that the designed hybrid HVDC power transmission system and its control strategy are feasible and reliable.

关 键 词：电压源变流器 相控变流器 输电系统 

分 类 号：TM46[电气工程—电器]