文章摘要
李岩,龚雁峰.多端直流电网限流电抗器的优化设计方案[J].电力系统自动化. DOI: 10.7500/AEPS20180308009.
LI Yan,GONG Yanfeng.Optimal Design of Current Limiting Reactor for Multi-Terminal DC Grid[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180308009.
多端直流电网限流电抗器的优化设计方案
Optimal Design of Current Limiting Reactor for Multi-Terminal DC Grid
DOI:10.7500/AEPS20180308009
关键词: 多端直流电网  限流电抗器  故障电流  直流断路器  换流站闭锁  优化算法  
KeyWords: multi-terminal grid  current limiting reactor  fault currents  DC circuit breaker  converter blocking  optimization algorithm
上网日期:2018-09-11
基金项目:中央高校基本科研业务费专项资助
作者单位E-mail
李岩 华北电力大学 whu_liyan1990@163.com 
龚雁峰 华北电力大学 yanfeng.gong@ncepu.edu.cn 
摘要:
      针对多端直流(Multi-terminal DC, MTDC)电网中限流电抗器的配置问题,提出了一种通用的优化设计新方案。该方案以系统配置的限流电感总和最小作为优化目标,综合考虑了直流断路器、换流站闭锁和保护需求的约束条件,采用优化算法确定了限流电抗器的全局最优配置。该设计方案减小了限流电感给系统带来的不利影响,并能够保证系统在故障穿越期间连续、可靠地运行。由于在优化过程中采用了短路电流近似计算模型,从而大大提高了优化效率。最后,基于PSCAD/EMTDC仿真平台搭建三端模块化多电平换流器(Modular Multi-level Converter, MMC)型直流电网,仿真结果证明了本文提出方法的有效性。
Abstract:
      Abstract: This paper propose a general design method for the optimization of current limiting reactor design in multi-terminal DC (MTDC) grid. In order to reduce adverse impacts of large reactors, The minimization of the total current limiting reactors installed in the system is determined as the design objectives, and the constraints of DC circuit breaker, converter blocking and protection requirements are considered during the design. The optimization algorithm is used to determine the optimal allocation of current limiting reactors. The proposed design method reduce the adverse impacts of large reactors, and enable the continuous and reliable operation during fault ride-through. Furthermore, since the approximate model of fault currents calculation for MTDC is used, the calculation efficiency is improved greatly. At last, a three-terminal modular multi-level converter (MMC) based DC grid is modeled in PSCAD software, and the simulation results verify the effectiveness of the proposed method.
查看全文   查看/发表评论  下载PDF阅读器