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山东理工大学电气与电子工程学院,山东省淄博市 255000
邢琳(1998—),女,硕士研究生,主要研究方向:直流配电系统随机稳定分析。E-mail:wangmumu101876@163.com
彭克(1983—),男,通信作者,教授,博士生导师,主要研究方向:交直流配电系统与综合能源系统。E-mail:pengke@sdut.edu.cn
张新慧(1971—),女,教授,硕士生导师,主要研究方向:配电网故障监测及自动化、分布式电源并网。E-mail:zhxh@sdut.edu.cn
收稿:2022-08-31,
修回:2022-11-23,
网络出版:2023-02-01,
纸质出版:2023-05-10
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邢琳,彭克,张新慧等.直流配电系统主从控制下的随机稳定性分析[J].电力系统自动化,2023,47(9):110-117.
XING Lin,PENG Ke,ZHANG Xinhui,et al.Stochastic Stability Analysis of DC Distribution System Under Master-slave Control[J].Automation of Electric Power Systems,2023,47(9):110-117.
邢琳,彭克,张新慧等.直流配电系统主从控制下的随机稳定性分析[J].电力系统自动化,2023,47(9):110-117. DOI: 10.7500/AEPS20220831001.
XING Lin,PENG Ke,ZHANG Xinhui,et al.Stochastic Stability Analysis of DC Distribution System Under Master-slave Control[J].Automation of Electric Power Systems,2023,47(9):110-117. DOI: 10.7500/AEPS20220831001.
分布式电源的间歇性波动以及储能、电动汽车反复充放电等随机因素对直流配电系统的稳定运行带来了极大的挑战。首先,文中针对主从控制下直流配电系统的随机激励,建立了降阶随机微分方程,推导了系统随机微分方程的解析解。然后,建立了均值及均方稳定性的解析化判据,全面刻画了小扰动稳定与均值及均方稳定的关系,推导出小扰动不稳定但均值均方稳定的判据。最后,通过仿真及实验验证了理论分析的有效性。
The intermittent fluctuations of distributed generators and stochastic factors such as repeated charging and discharging of energy storage and electric vehicles bring great challenges to the stable operation of DC distribution systems. First
this paper establishes a reduced-order stochastic differential equation for the stochastic excitation of the DC distribution system under master-slave control and derives the analytical solution of the stochastic differential equation. Then
the analytic criterion of mean and mean square stability is established
and the relationship between small disturbance stability and average and mean square stability is comprehensively portrayed. The criterion of small disturbance instability
average stability and mean square stability is derived. Finally
the validity of the theoretical analysis is verified by simulation and experiment.
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