文章摘要
基于PSCAD的特高压直流输电系统建模与仿真分析
Modeling and Simulation Analysis of UHVDC Transmission System Based on PSCAD
投稿时间:2020-04-01  修订日期:2020-04-29
DOI:
中文关键词: 换相失败  特高压直流输电系统模型  戴维南等值  PSCAD\EMTDC仿真平台#$NL中图分类号:TM721.1
英文关键词: Commutation failure  UHVDC transmission system model  Thevenin equivalent  PSCAD \ EMTDC
基金项目:国网浙江省电力有限公司科技项目;江苏省特聘教授项目
作者单位E-mail
许多 河海大学 1583288042@qq.com 
吴峰 河海大学  
史林军 河海大学  
彭琰 国网浙江省电力科学研究院  
黄弘扬 国网浙江省电力科学研究院  
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中文摘要:
      为了对特高压直流输电系统中的故障变化特性进行准确的仿真与分析,在PSCAD\EMTDC仿真平台上,以宾金直流为例,搭建 800kV,8000MW的特高压双极直流输电系统模型,该模型将主要对直流输电系统中的无功补偿设备、滤波装置、直流线路、直流控制系统进行详细建模。对于送、受端交流系统,在换流母线处对两侧实际交流系统进行戴维南等值,搭建了以直流系统为主、交流系统简化的实际系统输电模型。并对直流系统的典型故障换相失败进行仿真分析。分析了换相失败故障发生前后,特高压直流系统中主要电气量的变化。通过与实际故障录波的波形对比,验证了模型的可行性。着重分析了逆变侧换流母线上流入受端交流系统有功功率、无功功率的变化。研究结论为分析特高压直流换相失败故障对于实际交流系统的影响提供了技术支持。
英文摘要:
      In order to accurately simulate and analyze the characteristics of fault changes in UHVDC transmission systems, on the PSCAD\EMTDC simulation platform, taking Binkin DC transmission system as an example, a 800kV, 8000MW bipolar UHVDC transmission system model was built It will mainly model the reactive power compensa-tion equipment, filtering device, DC line and DC control system in the DC transmission system. For the transmission and reception AC systems, the Thevenin equivalents of the actual AC systems on both sides are made at the con-verter bus, and a practical system transmission model with a DC system as the main and a simplified AC system is built. Simulate and analyze the commutation failure of typical faults in the DC system. The main electrical changes in UHVDC system before and after the failure of commutation failure are analyzed. The feasibility of the model is verified by comparing with the waveform of the actual fault recorder. The changes of active power and reactive power flowing into the receiving AC system on the inverter-side converter bus are emphasized. The research con-clusion provides technical support for analyzing the impact of UHV DC commutation failure faults on the actual AC system.
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