文章摘要
大规模新能源经张北柔直孤岛送出的虚拟频率研究
Research of Virtual Frequency Control of Islanded Large-Scale Renewable Energy Power System Delivered by Zhangbei VSC-HVDC
投稿时间:2019-06-05  修订日期:2019-08-09
DOI:
中文关键词: 孤岛送出系统  虚拟频率  新能源一次调频  功率波动自主抑制
英文关键词: islanded renewable power system  virtual frequency  PFR of renewable power station  active regulation of power fluctuation
基金项目:国家电网公司科技项目(XTB17201600139)
作者单位E-mail
郭贤珊 国家电网有限公司 xianshan-guo@sgcc.com.cn 
王晖 中国电力科学研究院有限公司  
卜广全 中国电力科学研究院有限公司  
李文锋 中国电力科学研究院有限公司  
赵兵 中国电力科学研究院有限公司  
张健 中国电力科学研究院有限公司  
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中文摘要:
      大规模新能源经柔性直流送出为解决新能源并网消纳提供了一种新的思路,但是在不加任何附加控制的情况下,新能源的有功波动会经过柔直全部传递到受端电网。为了解决新能源经柔直并网的有功波动问题,本文针对张家口地区的大规模新能源发电经张北柔直换流站孤岛送出系统,对该区域的风电运行数据进行分析,得出该地的风电短时波动特性。同时在孤岛换流站的VF控制基础上,设计了换流站虚拟频率控制策略,与新能源发电的一次调频控制一起实现孤岛换流站的功率波动自主抑制功能。最后搭建了大规模风电经单端VSC-HVDC孤岛送出系统仿真平台,仿真结果验证了设计的虚拟频率+一次调频控制的方案可以在风机运行状态正常的前提下,较好地实现对孤岛换流站的功率波动进行抑制。
英文摘要:
      VSC-HVDC (voltage sourced converter based high voltage direct current) provides a new way to solve the grid-connected accommodation problem of renewable energy. However, the active power fluctuation of renewable energy will be transmitted to the receiving-end power grid through VSC-HVDC without any additional control. In order to solve the active power fluctuation problem of renewable energy grid-connected through VSC-HVDC, this paper focused on an islanded large-scale renewable energy power system in Zhangjiakou area which delivered by VSC-HVDC. The short-time power fluctuation characteristic of wind farms in this area was obtained by the analysis of the actual operation data. A virtual frequency control strategy was designed on the basis of VF control in a islanded VSC station. Thus,the active regulation of power fluctuation function would be realized by the proposed virtual frequency control in VSC station and PFR in renewable power generation. Finally, a simulation platform of large-scale wind power delivered by single terminal VSC-HVDC was built. The simulation result testified that the power fluctuation was well regulated by the proposed the virtual frequency control cooperated with the PFR control in terms of the wind power generation operated normally.
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