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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
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
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
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
收稿日期:2019-09-09,
修回日期:2020-01-15,
网络出版日期:2020-07-02,
纸质出版日期:2020-07-25
移动端阅览
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.
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.
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.
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。
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.
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