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1.智能电网教育部重点实验室(天津大学),天津市 300072
2.天津市智慧能源与信息技术重点实验室,天津市 300072
3.全球能源互联网研究院有限公司,北京市 102209
朱琳(1983—),女,博士,讲师,博士生导师,主要研究方向:中低压直流/交直流电力系统控制与保护、高比例可再生能源接入及消纳技术、控制及功率等级硬件在环仿真等。E-mail:lin_zhu@tju.edu.cn
赵学深(1991—),男,博士研究生,主要研究方向:直流配电系统等效降阶建模、机理分析及控制参数设计。E-mail:zxs_1019@tju.edu.cn
郭力(1981—),男,博士,教授,博士生导师,主要研究方向:分布式发电、微电网系统等。E-mail:liguo@tju.edu.cn
李霞林(1986—),男,通信作者,博士,副教授,博士生导师,主要研究方向:变流器控制、分布式电源及微电网控制技术等。E-mail:xialinlee@tju.edu.cn
收稿:2021-06-22,
修回:2021-09-08,
网络出版:2021-10-26,
纸质出版:2022-02-10
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朱琳,赵学深,郭力等.计及换流器间动态交互的中压直流配电系统控制参数设计[J].电力系统自动化,2022,46(3):121-128.
ZHU Lin,ZHAO Xueshen,GUO Li,et al.Control Parameter Design of Medium-voltage DC Distribution System Considering Dynamic Interaction Between Converters[J].Automation of Electric Power Systems,2022,46(3):121-128.
朱琳,赵学深,郭力等.计及换流器间动态交互的中压直流配电系统控制参数设计[J].电力系统自动化,2022,46(3):121-128. DOI: 10.7500/AEPS20210622004.
ZHU Lin,ZHAO Xueshen,GUO Li,et al.Control Parameter Design of Medium-voltage DC Distribution System Considering Dynamic Interaction Between Converters[J].Automation of Electric Power Systems,2022,46(3):121-128. DOI: 10.7500/AEPS20210622004.
由于各换流器间存在动态交互作用,使得中压直流(MVDC)配电系统的控制参数设计比单台换流器时困难得多。首先,针对系统中换流器的电流控制环、电压控制环和下垂控制环,依次分别建立了计及换流器间动态交互的开环和闭环传递函数,并且所建传递函数零极点的个数与单台换流器独立运行时完全一致。然后,提出了一种计及换流器间动态交互的MVDC配电系统控制参数设计方法,该方法能够从系统动态稳定性的角度定性定量设计控制参数。该设计方法通过部分零极点的相互抵消,利用一对共轭主导极点准确设计系统动态特性,并在较宽频率范围(如10~50 Hz)内均有效。最后,在电力电子仿真软件PLECS中对所提传递函数和控制参数设计方法进行了仿真验证。
Due to the dynamic interaction between converters
the design of control parameters of medium-voltage DC (MVDC) distribution systems is much more complicated than that of single converter. First
for the current control loop
the voltage control loop and droop control loop of the converters in the system
the open-loop and closed-loop transfer functions considering the dynamic interaction between the converters are established respectively. In addition
the number of poles (or zeros) of the transfer function considering the dynamic interaction between converters is consistent with the single-converter situation. Then
a control parameter design method for the MVDC distribution system considering the dynamic interaction between converters is proposed. In this design method
the control parameters of all converters are designed qualitatively and quantitatively from the perspective of system dynamic stability. Through the mutual cancellation of some zeros and poles
the dynamic characteristics of the system can be designed by this method with a pair of conjugate poles. Moreover
this design method is effective in a wide oscillation frequency range (for example 10~50 Hz). Finally
the proposed transfer function and control parameter design method are simulated and verified in the power electronics simulation software PLECS.
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