SUN Yuanyuan,CHENG Kaiqiang,XU Qingshen,et al.Identification of Weak Link for Active Distribution Network Considering Correlation of Photovoltaic Output[J].Automation of Electric Power Systems,2022,46(15):96-103.
SUN Yuanyuan,CHENG Kaiqiang,XU Qingshen,et al.Identification of Weak Link for Active Distribution Network Considering Correlation of Photovoltaic Output[J].Automation of Electric Power Systems,2022,46(15):96-103. DOI: 10.7500/AEPS20211214001.
Identification of Weak Link for Active Distribution Network Considering Correlation of Photovoltaic Output
With the integration of large-scale distributed photovoltaic (PV)
problems such as voltage violation and power flow inversion have emerged in the medium- and low-voltage distribution networks. In order to effectively identify the weak links of distribution networks containing distributed PV
a probabilistic power flow calculation method considering the correlation of distributed PV output is proposed. Based on Copula theory and jointly distribution rejection sampling
the scenarios related to PV output are generated. Considering the characteristics of status weakness and structure weakness
the evaluation index system is established
which effectively realizes the risk characterization of nodes and lines. On the one hand
the status weakness evaluation index of active distribution network components based on improved repetitive power flow is proposed; on the other hand
the structure weakness evaluation index of active distribution network components is improved. The weak link identification method based on least-squares support vector machine is proposed for distribution networks containing large-scale distributed PV. Finally
the effectiveness of the proposed method is verified by the actual data of regional distribution networks and simulation example.
KANG Chongqing , YAO Liangzhong . Key scientific issues and theoretical research framework for power systems with high proportion of renewable energy [J]. Automation of Electric Power Systems , 2017 , 41 ( 9 ): 2 - 11 .
ZHANG Tiance , WANG Jianxiao , LI Gengyin , et al . Perception method of voltage spatial-temporal distribution of distribution network with high penetration of renewable energy [J]. Automation of Electric Power Systems , 2021 , 45 ( 2 ): 37 - 45 .
LU Zongxiang , HUANG Han , SHAN Baoguo , et al . Morphological evolution model and power forecasting prospect of future electric power systems with high proportion of renewable energy [J]. Automation of Electric Power Systems , 2017 , 41 ( 9 ): 12 - 18 .
MA Yu , WEI Gang , LI Yang , et al . Reliability evaluation of DC distribution network considering islanding source-load uncertainty [J]. Transactions of China Electrotechnical Society , 2021 , 36 ( 22 ): 4726 - 4738 .
WU Runji , WANG Dongxiao , XIE Changhong , et al . Distributed control method for air-conditioning load participating in voltage management of distribution network [J]. Automation of Electric Power Systems , 2021 , 45 ( 6 ): 215 - 222 .
ZHANG Shun . Research on identification method of weak links and countermeasures in power grids [D]. Wuhan : Huazhong University of Science and Technology , 2017 .
CHEN Weihua , JIANG Quanyuan , CAO Yijia . Voltage vulnerability assessment based on risk theory and fuzzy reasoning [J]. Proceedings of the CSEE , 2005 , 25 ( 24 ): 20 - 25 .
WAN Can , SONG Yonghua . Theories, methodologies and applications of probabilistic forecasting for power systems with renewable energy sources [J]. Automation of Electric Power Systems , 2021 , 45 ( 1 ): 2 - 16 .
WEI Zhenbo , LIU Junyong , ZHU Guojun , et al . Vulnerability evaluation model to power grid based on reliability-parameter-weighted topological model [J]. Transactions of China Electrotechnical Society , 2010 , 25 ( 8 ): 131 - 137 .
DING Liang , HUANG Jianyang , XU En , et al . Comprehensive vulnerability assessment and structure optimization analysis of power grid lines considering complex environmental characteristics [J]. Power System Protection and Control , 2021 , 49 ( 13 ): 105 - 113 .
LIN Tao , CHEN Yichao , CHENG Junzhao , et al . Survey of vulnerability assessment methods for active distribution networks [J]. Electrical & Energy Management Technology , 2019 ( 15 ): 77 - 80 .
WAN Lingyun , ZHANG Ying , LIU Zhen , et al . Analysis and improvement of weak link of distribution network reliability [J]. Shandong Electric Power , 2016 , 43 ( 6 ): 39 - 42 .
WAN Lingyun , WANG Honggang , LI Xiaopeng , et al . Analysis of the weak links of the reliability of the distribution network in the hi-rel demonstration zone of Chongqing [J]. Journal of Chongqing Electric Power College , 2016 , 21 ( 6 ): 28 - 31 .
李榛 . 聊城市配电网薄弱环节分析及解决对策研究 [D]. 济南 : 山东大学 , 2018 .
LI Zhen . The research of the weakness and solution about power distribution network in Liaocheng [D]. Jinan : Shandong University , 2018 .
HAN Shuai , ZHANG Feng , DING Lei , et al . Available inertia evaluation method of wind farm based on mixed Copula function [J]. Electric Power Automation Equipment , 2021 , 41 ( 3 ): 189 - 195 .
ZHAO Shuqiang , YAO Jinming , LI Zhiwei . Wind power scenario reduction based on improved K -means clustering and SBR algorithm [J]. Power System Technology , 2021 , 45 ( 10 ): 3947 - 3954 .
ZHANG Zhe . Power quality probabilistic evaluation on distribution system with considering distributed generators [D]. Beijing : North China Electric Power University , 2013 .
SHI Dongyuan , CAI Defu , CHEN Jinfu , et al . Probabilistic load flow calculation based on cumulant method considering correlation between input variables [J]. Proceedings of the CSEE , 2012 , 32 ( 28 ): 104 - 113 .
LIU Ruoxi . Research on several fundamental theory and algorithm of power system operational security [D]. Beijing : North China Electric Power University , 2012 .
LI Zhenkun , CHEN Xingying , LIU Haoming , et al . Online assessment of distribution network loading capability [J]. Automation of Electric Power Systems , 2009 , 33 ( 6 ): 36 - 39 .
Technical specification for evaluation of distribution network development planning : Q/GDW 11615—2017 [S]. Beijing : State Grid Corporation of China , 2018 .
SHI Wenchao , LI Xiaoming , WANG Xiaolin , et al . Vulnerability assessment method for distribution network [J]. Proceedings of the CSU-EPSA , 2018 , 30 ( 12 ): 125 - 131 .