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虚拟直流电机的参数自适应控制策略
作者:
作者单位:

1.北京交通大学国家能源主动配电网技术研发中心,北京市 100044;2.北京电动车辆协同创新中心,北京市 100044;3.深圳供电局有限公司,广东省 深圳市 518020

摘要:

为了提升直流微电网的稳定性,虚拟直流电机控制被应用于直流变换器中,使变换器具有直流电机的外特性。但传统参数恒定的虚拟直流电机控制较难在提供惯性与阻尼支撑的同时实现较佳的动态性能。针对该问题,文中以Buck变换器作为研究对象。首先,建立虚拟直流电机控制小信号模型,分析了负载功率突变时转动惯量和阻尼系数对输出电压动态特性的影响。在此基础上,提出了虚拟直流电机参数自适应控制,给出了转动惯量和阻尼系数自适应调节原则和参数整定方法。最后,仿真与实验结果表明,相比传统虚拟直流电机控制策略,所提控制策略使系统在提供惯性和阻尼支撑的同时具有较快的响应以及较小的超调,可较好地抑制直流母线电压的波动。

关键词:

基金项目:

中国南方电网有限责任公司科技项目(090000KK52180116);北京市自然科学基金委-教委联合资助项目(KZ201911232045)。

通信作者:

唐芬(1984—),女,通信作者,博士,副教授,硕士生导师,主要研究方向:电力电子与电力传动、新能源发电、微电网控制等。E-mail:fent@bjtu.edu.cn

作者简介:

王勉(1985—),男,博士研究生,主要研究方向:新能源发电、微电网控制等。E-mail:17117421@bjtu.edu.cn
赵宇明(1978—),男,博士,教授级高级工程师,主要研究方向:电力系统、直流输配电等。E-mail:zhaoym97@sina.com


Parameter Adaptive Control Strategy of Virtual DC Machine
Author:
Affiliation:

1.National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China;2.Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100044, China;3.Shenzhen Power Supply Co., Ltd., Shenzhen 518020, China

Abstract:

In order to improve the stability of the DC microgrid, the virtual DC machine (VDCM) control is applied to the DC converters, so that the converters have the external characteristics of the DC machine. However, the traditional VDCM with constant control parameters is difficult to supply inertia and damping support while achieving good dynamic performance. Aiming at this issue, Buck converter is taken as the research object in the paper. Firstly, the small-signal model of VDCM control is built, and the influence of inertia and damping coefficient on the dynamic characteristics of output voltage is analyzed when the load power changes suddenly. On this basis, an parameter adaptive control strategy based on VDCM is proposed, and the adaptive adjustment rules of inertia and damping coefficient and parameter setting method are given. Finally, the simulation and experimental results show that, compared with the traditional VDCM control strategy, the proposed control strategy can provide inertial and damping support while achieving faster response and smaller overshoot, which presents better fluctuation suppression of DC bus voltage.

Keywords:

Foundation:
This work is supported by China Southern Power Grid Co., Ltd. and Beijing Natural Science Foundation-Education Commission of China (No. KZ201911232045).
引用本文
[1]王勉,唐芬,赵宇明,等.虚拟直流电机的参数自适应控制策略[J].电力系统自动化,2020,44(14):148-155. DOI:10.7500/AEPS20190909001.
WANG Mian, TANG Fen, ZHAO Yuming, et al. Parameter Adaptive Control Strategy of Virtual DC Machine[J]. Automation of Electric Power Systems, 2020, 44(14):148-155. DOI:10.7500/AEPS20190909001.
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  • 收稿日期:2019-09-09
  • 最后修改日期:2020-01-15
  • 录用日期:
  • 在线发布日期: 2020-07-20
  • 出版日期:
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