文章摘要
周京华,张荣,陈亚爱,等.张北数据港柔性变电站DC/AC变流器关键控制策略[J].电力系统自动化,2019,43(11):128-134. DOI: 10.7500/AEPS20180625007.
ZHOU Jinghua,ZHANG Rong,CHEN Yaai, et al.Key Control Strategy for DC/AC Converter in Flexible Substation in Zhangbei Data Center[J].Automation of Electric Power Systems,2019,43(11):128-134. DOI: 10.7500/AEPS20180625007.
张北数据港柔性变电站DC/AC变流器关键控制策略
Key Control Strategy for DC/AC Converter in Flexible Substation in Zhangbei Data Center
DOI:10.7500/AEPS20180625007
关键词: 不平衡电压控制  谐波电压抑制  模糊控制  主动限流控制
KeyWords: unbalanced voltage control  harmonic voltage suppression  fuzzy control  active current-limiting control
上网日期:2019-04-12
基金项目:国家自然科学基金面上项目(51777002);北京市高水平创新团队建设计划资助项目(IDHT20180502)
作者单位E-mail
周京华 北京市变频技术工程技术研究中心(北方工业大学), 北京市 100144 zjh@ncut.edu.cn 
张荣 北京市变频技术工程技术研究中心(北方工业大学), 北京市 100144  
陈亚爱 北京市变频技术工程技术研究中心(北方工业大学), 北京市 100144  
张新雷 北京市变频技术工程技术研究中心(北方工业大学), 北京市 100144  
宇文博 华夏天信(北京)智能低碳技术研究院有限公司, 北京市 100102  
吴杰伟 北京市变频技术工程技术研究中心(北方工业大学), 北京市 100144  
摘要:
      柔性直流输电是实现新能源并网和直流电网的极具潜力的输电方式。文中在张北数据港设计构造了一台柔性直流输电系统用DC/AC变流器。所设计的变流器采用多变流器并联+z型接地变压器结构。为抑制离网下由于负荷特性而造成的输出电压不平衡与输出电压畸变问题,分别提出了变流器输出电压不平衡控制策略与输出电压谐波抑制策略,以保证设备的供电质量。为保证设备的不间断供电并提高设备的供电可靠性,提出一种主动限流控制策略,在设备离网供电模式下电力系统发生短路故障时进行主动限流。最后,搭建了2.5 MW DC/AC变流器进行实验研究。实验结果验证了所提控制策略的有效性。目前,该装置已应用于张北数据港柔性变电站。
Abstract:
      The voltage source converter based high voltage direct current(VSC-HVDC)technology is a potential transmission method for new energy grid-connection and DC grids. A DC/AC converter for VSC-HVDC transmission system is designed and constructed in Zhangbei data center. The designed DC/AC converters adopts the structure of paralleled multi-converter+z-type grounding transformer. In order to suppress the output voltage unbalance and output voltage distortion caused by load characteristics in the off-grid mode, an unbalance control strategy and a harmonic suppression strategy of converter output voltage are proposed to ensure the quality of power supply. In order to ensure the uninterrupted power supply and improve the power supply reliability of the equipment, an active current-limiting control strategy is proposed to limit the current actively when the power system has a short-circuit fault in the off-grid power supply mode. Finally, a 2. 5 MW DC/AC converter is built for experimental research. The experimental results verify the effectiveness of the proposed control strategy. The designed converter has been applied to the flexible substation in Zhangbei data center.
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