文章摘要
带频率-电压死区的VSC-HVDC系统一次调频控制策略
Primary Frequency Modulation Control Strategy for VSC-HVDC System with Frequency-Voltage Dead Zone
投稿时间:2019-03-04  修订日期:2019-06-22
DOI:
中文关键词: 风电机群  VSC-HVDC  一次调频  频率-电压死区
英文关键词: wind turbines  VSC-HVDC  Primary frequency modulation  frequency-voltage dead-zone
基金项目:
作者单位E-mail
徐晓颖 河海大学 18252039352@163.com 
吴继平 南瑞集团公司国网电力科学研究院  
滕贤亮 南瑞集团公司国网电力科学研究院  
陈谦 河海大学  
喻洁 东南大学  
丁恰 南瑞集团公司国网电力科学研究院  
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中文摘要:
      为使含新能源接入的柔性直流(VSC-HVDC)互联系统中的新能源端整体参与交流电网的频率调整,本文提出一种带频率-电压死区的换流站端有功控制策略。该控制策略利用频率-电压死区限值,通过VSC-HVDC输出功率的实时控制,在系统侧交流电网发生频率变化时,风机转子的动能储备短时内增加或减少有功输出,使风机转速下降或增高,通过增加/减少风机转子中的动能储备,来缓解交流系统端的不平衡有功功率,通过VSC-HVDC互联系统作出频率响应参与调频。最后利用PSCAD/EMTDC对该控制策略进行仿真验证,结果表明所提策略提高了含新能源接入的两端VSC-HVDC互联系统的频率稳定性。
英文摘要:
      In order to make the new energy terminal of voltage source converter based high voltage direct current (VSC-HVDC) interconnected system with new energy access participate in the frequency adjustment of AC network as a whole, an active power control strategy for the converter station terminal with frequency-voltage dead zone is proposed. This strategy using frequency-voltage dead-zone limit and real-time control of the output power of VSC-HVDC.When the frequency of AC network changes on the system side, the kinetic energy reserve of the wind rotor increases or decreases the active output in a short time,so that the speed of the wind Turbine decreases or increases. By increasing/reducing the kinetic energy reserve in the rotor of the wind motor, the unbalanced active power at the AC system terminal can be alleviated, through the VSC-HVDC interconnected system to make frequency response to participate in frequency modulation.Finally, simulations with PSCAD/EMTDC verify that the proposed control strategy is able to enhance the frequency stability of the vsc-hvdc interconnection system with new energy access.
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