舟山多端柔性直流工程过电压与绝缘配合  

Overvoltage and Insulation Coordination for Zhoushan Multi-Terminals VSC-HVDC Project

作　　者：余世峰[1] 马为民[1] 聂定珍[1] 李亚男[1] 蒋维勇[1] 

机构地区：[1]国网北京经济技术研究院,北京市100052

出　　处：《电力建设》2014年第3期7-12,共6页Electric Power Construction

基　　金：国家电网公司科技项目(B3441413K005)

摘　　要：舟山多端柔性直流工程过电压与绝缘配合研究为工程实施提供了基础技术支撑。为确定避雷器保护配置方案及设备绝缘水平,开展了成套设计研究,确定了工程的主回路参数及主接线。按照舟山多端柔性直流工程控制策略建立了电磁暂态仿真模型,模型中的换流器子模块电容、联结变压器、桥臂电抗器及直流电抗器电感值、接地方式的选择和电缆参数的选取均对过电压仿真结果有较大影响。在详细开展设备参数研究的基础上,为了选取并用于建模,开展了过电压研究,确定了主要设备的绝缘水平。对于本工程关键设备———直流电缆,提出采用30%的绝缘裕度以确保运行安全,并最终确定其绝缘水平为510 kV。研究结果已应用于舟山多端柔性直流工程,研究手段为其他同类工程提供了参考。： Study on overvoltage and insulation coordination can provide basic technical support for the implementation of Zhoushan multi-terminals VSC-HVDC （voltage sourced converters based high voltage direct current ） project. In order to determine the protection configuration of arrester scheme and the insulation level of equipment, integrated design was carried out and the main circuit parameters of the project were proposed, as well as the main wiring. According to the control strategy of Zhoushan multi-terminals VSC-HVDC project, the electromagnetic transient simulation model was established. The capacitance of sub-module in converters, the type of transformer, the inductance of arm reactors and DC reactors, the grounding modes and the selection of cable paran^ters all influenced simulation results significantly in the model. Based on the detailed research, the equipments＇ parameters were selected and used for the overvoltage simulation, the insulation levels of main equipments were determined as well. As the key equipment in this project, the DC cable＇ s insulation margin was suggested to be 30% in order to ensure the safe operation, and its insulation level was fmally determined to be 510 kV. The research results have been applied in Zhoushan multi-terminals VSC-HVDC project, which can provide references for other similar projects.

关 键 词：多端柔性直流系统 过电压 绝缘配合 主设备参数 

分 类 号：TM721.1[电气工程—电力系统及自动化]