• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2018, Vol. 39 ›› Issue (4): 126-.doi: 10.3969/j.issn.1000-7229.2018.04.018

• 储能技术 • 上一篇    

 用于储能变流器的改进型VSG控制方法

 杨波1, 冯鑫振2,王德顺2,余涛3,张宸宇4

 
  

  1.  (1.新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市 100192;2.中国电力科学研究院江苏省储能变流及应用工程技术研究中心,南京市 210003;3.国网常州供电公司,江苏省常州市 213003;4.国网江苏省电力有限公司电力科学研究院,南京市 211103)
     
  • 出版日期:2018-04-01
  • 作者简介:杨波(1977),男,硕士,高级工程师,主要研究方向为储能变流及集成技术、分布式发电与微电网技术、新能源直流输电技术; 冯鑫振(1986),男,硕士,工程师,主要研究方向为分布式发电与微电网、储能变流控制技术方面的研究工作; 王德顺(1982),男,硕士,工程师,主要研究方向为电力储能、电力电子控制技术; 余涛(1974),男,本科,高级工程师,主要研究方向为电力系统运行与控制; 张宸宇(1989),男,博士,工程师,主要研究方向为新能源与微电网、电力电子控制技术。
  • 基金资助:
     基金项目:国网江苏省电力有限公司科技项目“储能提高规模化光伏发电消纳和用户用电质量的关键技术研究”
     

 An Improved VSG Control Method for Energy Storage Converters

 YANG Bo1, FENG Xinzhen2, WANG Deshun2, YU Tao3, ZHANG Chenyu4

 
  

  1.  (1.State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, China Electric Power Research Institute, Beijing 100192, China;2.Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application, China Electric Power Research Institute, Nanjing 210003, China;3.State Grid Changzhou Power Supply Company, Changzhou 213003, Jiangsu Province, China; 4.State Grid Jiangsu Electric Power Co., Ltd.Research Institute, Nanjing 211103, China )
     
  • Online:2018-04-01
  • Supported by:
     

摘要:  摘要:文章提出一种改进型虚拟同步机(virtual synchronous generator,VSG)控制方法应用于交流微网环境下的储能变流器。针对传统VSG存在的有功功率振荡问题,加入虚拟电抗模块,以实际同步机的典型直轴暂态电抗为目标值来调节VSG对外表现电抗,提高系统的阻尼系数,实现有功功率振荡的抑制。针对传统VSG存在的无功功率分配不合理问题,提出采用稳定的交流母线电压作为励磁控制的参考值,给出通过机端电压以及线路参数估算母线电压的方法,并分析选取合适的下垂系数,实现有功和无功功率解耦,且输出无功功率能够按各机容量比精确分配。最后使用MATLAB/Simulink平台进行仿真,将该方法与传统VSG控制进行对比,验证所提控制策略的有效性与优越性。

 

关键词:

Abstract:  ABSTRACT: This paper proposes the control method of improved VSG (virtual synchronous generator) control method applied to energy storage converter in AC microgrid.According to the problem of active power oscillation in traditional VSG, a virtual reactance module is added to adjust VSG external characteristic reactance with the typical direct-axis transient reactance of synchronous machine as the target value.It can improve the virtual damping coefficient of VSG, and realize the reduction of active power oscillation.According to the problem of irrational reactive power distribution in traditional VSG, the stable AC bus voltage is used as the referencial voltage  in excitation control, the method of estimating bus voltage through machine terminal voltage and line parameters is presented.The reasonable droop gain is analyzed and chosen, which realizes the active reactive power decoupling and the  rational share of reactive power.Meanwhile, the output power of reactive power can be accurately distributed according to the capacity ratio of each machine.Finally, the simulation system using the proposed method and traditional VSG control is built with MATLAB/Simulink, the effectiveness and superiority of the proposed scheme is verified.

 

Key words:  KEYWORDS: energy storage converter, VSG control, virtual reactance, bus voltage estimation

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