文章摘要
王庆,卢宇,胡兆庆,等.柔性直流输电系统孤岛运行方式下故障电流抑制方法[J].电力系统自动化. DOI: 10.7500/AEPS20170617002.
wangqing,,HU Zhaoqing, et al.The fault current limit control strategy for VSC-HVDC system connected to passive networks[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20170617002.
柔性直流输电系统孤岛运行方式下故障电流抑制方法
The fault current limit control strategy for VSC-HVDC system connected to passive networks
DOI:10.7500/AEPS20170617002
关键词: 柔性直流输电  孤岛  故障穿越  控制
KeyWords: VSC HVDC  Island  fault ride-through  control
上网日期:2018-02-06
基金项目:国家重点研发计划项目(2016YFB0900602)
作者单位E-mail
王庆 武汉大学电气工程学院 huzq@nrec.com 
卢宇 南京南瑞继保电气有限公司 luy@nrec.com 
胡兆庆 南京南瑞继保电气有限公司 huzq@nrec.com 
王柯 南京南瑞继保电气有限公司 wangke@nrec.com 
随顺科 南京南瑞继保电气有限公司 suisk@nrec.com 
刘海彬 南京南瑞集团公司 liuhb@nrec.com 
摘要:
      本文结合实际工程需要,针对柔直系统运行在孤岛状态下发生交流侧故障后容易引起过流跳闸问题,提出一种柔直系统在孤岛运行方式下故障电流抑制和启动控制方法,该方法满足柔直孤岛运行下各类故障下电流抑制要求,并且可以做到在柔直设备自身能力范围内,向交流系统提供预先设定的故障电流,同时可以实现正常升压启动,结合基于控制保护样机和RTLAB构成的闭环实时仿真系统,对提出的方案进行验证,结果表明和常规的幅频开环孤岛控制以及电流环控制策略相比,提高了故障穿越能力,启动策略实现了孤岛运行模式下无冲击顺利启动。
Abstract:
      Abstract: According to the necessity of engineering and solving the problem of over current tripping under server AC fault, a kind of improved fault current limit and start control strategy for passive VSC-HVDC system is proposed, satisfying the requirement of limiting fault current under AC fault in island state, as well as islanding starting requirements. Furthermore, it can provide the fault current preset to AC system within the capacity of VSC valve devices itself, and realize the normal startup procedure in islanding operation state. With real-time closed-loop simulation system RTLAB and real control and protection devices, the proposed control strategy is verified. The results manifest that the proposed control strategy improve the fault ride through capability in contrast to the conventional control strategy, such as amplitude frequency or the normal closed-loop current control strategy, at the same time it realizes the startup without impact in island state.
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