中国电力 ›› 2014, Vol. 47 ›› Issue (12): 88-94.DOI: 10.11930/j.issn.1004-9649.2014.12.88.6

• 电网 • 上一篇    下一篇

S形下垂控制方法在微电网对等控制中的应用

李军, 杨志超, 陈凡   

  1. 南京工程学院 电力工程学院,江苏 南京 211167
  • 收稿日期:2014-09-29 出版日期:2014-12-18 发布日期:2015-12-08
  • 作者简介:李军(1979—),男,河南南阳人,博士,副教授,从事微电网运行控制及能量管理研究。E-mail: lijun98313@163.com
  • 基金资助:
    江苏省政府留学奖学金项目资助(JS-2012-052); 南京工程学院科研基金项目资助(ZKJ201304); 江苏省属高校自然科学基金项目(14KJD470004)

Application of S-Shaped Droop Control Method in Peer To Peer Control of Microgrids

LI Jun, YANG Zhi-chao, CHEN Fan   

  1. School of Electrical Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
  • Received:2014-09-29 Online:2014-12-18 Published:2015-12-08
  • Supported by:
    The work is supported by Jiangsu Government Scholarship for Overseas Studies(JS-2012-052) , Fund of Nanjing Institute of Technology (ZKJ201304) and Natural Science Foundation of the Higher Education Institutions of Jiangsu Province (14KJD470004)

摘要: 逆变器下垂控制策略的应用对于微电网“即插即用”功能的实现至关重要。针对逆变器传统下垂控制在面对大的负荷增量时存在频率偏差越限问题,结合传统发电机在二次调频操作下频率移动轨迹,设计出新型的S形下垂特性曲线,完成了数学建模,并对S形控制与传统下垂控制的兼容性进行了分析。利用Matlab/Simulink工具进行了仿真,结果表明S形下垂控制能有效缓解下垂控制所固有的频率偏移较大的问题。能够完整保持下垂控制特有的负荷功率自动分配特性,能够较好的与传统下垂控制的逆变器兼容并协调运行。

关键词: S形曲线, 下垂控制, 二次调频, 微电网, 逆变器控制, 同步发电机, 电能质量

Abstract: Application of inverter droop control strategy is vital for micro-grids to maintain the“plug and play” characteristics. While the conventional droop technology in inverters usually results in large frequency deviations in dealing with large incremental load demand, even breaking the upper and lower frequency limits, the ability of automatic share of load demand among sources is attractive. Based on secondary frequency regulation trajectory of synchronous generators, the S-shaped droop characteristic curve is designed and the mathematical model is built. And then the S-shaped control compatibility with conventional droop control is analyzed. With the help of Matlab/Simulink tools, the simulation results demonstrate that the S-shaped droop control can effectively improve the defect of inherent frequency deviation. The inverter controlled by S-shaped droop can operate with the inverter controlled by conventional droop independently with the ability of automatic sharing load demand among sources.

Key words: S-Shaped curve, droop control, secondary frequency regulation, microgrids, inverter control, synchronous generator, power quality

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