Optimal Planning for Soft Open Point Integrated with ESS to Improve the Economy of Active Distribution Network

doi:10.12204/j.issn.1000-7229.2020.10.007

Abstract

Abstract:

With the increasing penetration of renewable distributed generators (DGs), combined with the power regulation capabilities of soft open point (SOP) and the characteristics of energy storage system (ESS), SOP integrated with ESS (ESOP) can adjust the power flow and enhance the economy of active distribution networks (ADNs) in spatial and temporal aspects. Considering the complex physical structure and high investment cost of ESOP, reasonable capacity configuration of inverter and energy storage battery should be selected in the planning stage to enhance the comprehensive benefits of the ADNs. Firstly, the structure and mathematical model of ESOP are elaborated in this paper. Secondly, to establish the ESOP planning model of ADNs, the minimum comprehensive cost of the network is taken as the object and the operation constraints of ESOP and ADNs are considered. Finally, the second-order cone-programming algorithm is used to solve the proposed model, and the effectiveness of the proposed planning model is verified by a modified IEEE 33-node test system. The results show that the proposed ESOP planning model can effectively reduce the comprehensive cost and improve the economy of ADNs.

Key words: active distribution network, soft open point integrated with energy storage system, optimal configuration, operation economy

CLC Number:

TM715

WANG Junfeng, KONG Lingsheng, FAN Xinming, PENG Yuanquan, CHEN Hao, SONG Guanyu. Optimal Planning for Soft Open Point Integrated with ESS to Improve the Economy of Active Distribution Network[J]. ELECTRIC POWER CONSTRUCTION, 2020, 41(10): 63-70.

Figures/Tables 10

Fig.1 ESOP in a medium-voltage distribution network

Fig.2 Structure of modified IEEE 33-node test example

Fig.3 Typical scenarios of wind power output

Table 1 Economic parameters of ESOP

Table 2 Electricity price

Table 3 Optimal configuration scheme for ESOPs of case 1

Table 4 Cost analysis of SOP installation of case 1万元

Fig.4 Structure of distribution system in Foshan city

Table 5 Cost analysis of SOP installation of case 2

Table 6 Optimal configuration scheme for ESOPs of case 2万元

References 20

[1]	王成山, 焦冰琦, 郭力 , 等. 微电网规划设计方法综述[J]. 电力建设, 2015,36(1):38-45. doi: 10.3969/j.issn.1000－7229.2015.01.006 URL
	WANG Chengshan, JIAO Bingqi, GUO Li , et al. Review of methods of planning and design of microgrids[J]. Electric Power Construction, 2015,36(1):38-45. doi: 10.3969/j.issn.1000－7229.2015.01.006 URL
[2]	何湘宁, 宗升, 吴建德 , 等. 配电网电力电子装备的互联与网络化技术[J]. 中国电机工程学报, 2014,34(29):5162-5170. doi: 10.13334/j.0258-8013.pcsee.2014.29.018 URL
	HE Xiangning, ZONG Sheng, WU Jiande , et al. Technologies of power electronic equipment interconnecting and networking in distribution grids[J]. Proceedings of the CSEE, 2014,34(29):5162-5170.
[3]	CAO W Y, WU J Z, JENKINS N , et al. Operating principle of soft open points for electrical distribution network operation[J]. Applied Energy, 2016,164:245-257. doi: 10.1016/j.apenergy.2015.12.005 URL
[4]	JI H R, WANG C S, LI P , et al. Quantified flexibility evaluation of soft open points to improve distributed generator penetration in active distribution networks based on difference-of-convex programming[J]. Applied Energy, 2018,218:338-348. doi: 10.1016/j.apenergy.2018.02.170 URL
[5]	YAO L Z, YANG B, CUI H F , et al. Challenges and progresses of energy storage technology and its application in power systems[J]. Journal of Modern Power Systems and Clean Energy, 2016,4(4):519-528. doi: 10.1007/s40565-016-0248-x URL
[6]	YAO C, ZHOU C X, YU J C , et al. A sequential optimization method for soft open point integrated with energy storage in active distribution networks[J]. Energy Procedia, 2018,145:528-533. doi: 10.1016/j.egypro.2018.04.077 URL
[7]	王皓, 张舒淳, 李维展 , 等. 储能参与电力系统应用研究综述[J]. 电工技术, 2020(3):21-24, 27.
	WANG Hao, ZHANG Shuchun, LI Weizhan , et al. Survey of energy storage used in power system application[J]. Electric Engineering, 2020(3):21-24, 27.
[8]	马丽, 薛飞, 石季英 , 等. 有源配电网分布式电源与智能软开关三层协调规划模型[J]. 电力系统自动化, 2018,42(11):86-93.
	MA Li, XUE Fei, SHI Jiying , et al. Tri-level coordinated planning model of distributed generator and intelligent soft open pointfor active distribution network[J]. Automation of Electric Power Systems, 2018,42(11):86-93.
[9]	李燕, 胡志坚, 仉梦林 , 等. 基于不确定网络理论计及经济性与可靠性的主动配电网规划[J]. 电力系统自动化, 2019,43(16):68-77.
	LI Yan, HU Zhijian, ZHANG Menglin , et al. Active distribution network planning considering economy and reliability based on uncertain network theory[J]. Automation of Electric Power Systems, 2019,43(16):68-77.
[10]	王成山, 宋关羽, 李鹏 , 等. 考虑分布式电源运行特性的有源配电网智能软开关SOP规划方法[J]. 中国电机工程学报, 2017,37(7):1889-1896.
	WANG Chengshan, SONG Guanyu, LI Peng , et al. Optimal configuration of soft open point for active distribution network considering the characteristics of distributed generation[J]. Proceedings of the CSEE, 2017,37(7):1889-1896.
[11]	NICK M, CHERKAOUI R, PAOLONE M . Optimal planning of distributed energy storage systems in active distribution networks embedding grid reconfiguration[J]. IEEE Transactions on Power Systems, 2018,33(2):1577-1590. doi: 10.1109/TPWRS.2017.2734942 URL
[12]	JI H R, WANG C S, LI P , et al. Robust operation of soft open points in active distribution networks with high penetration of photovoltaic integration[J]. IEEE Transactions on Sustainable Energy, 2019,10(1):280-289. doi: 10.1109/TSTE.2018.2833545 URL
[13]	CAO W, WU J, JENKINS N , et al. Benefits analysis of soft open Points for electrical distribution network operation[J]. Applied Energy, 2016,165:36-47. doi: 10.1016/j.apenergy.2015.12.022 URL
[14]	赵金利, 李雨薇, 李鹏 , 等. 基于二阶锥规划的有源配电网SNOP电压无功时序控制方法[J]. 高电压技术, 2016,42(7):2134-2141.
	ZHAO Jinli, LI Yuwei, LI Peng , et al. Sequential voltage regulation of soft normally open point in active distribution network based on second-order cone programming[J]. High Voltage Engineering, 2016,42(7):2134-2141.
[15]	JI H R, WANG C S, LI P , et al. An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks[J]. Applied Energy, 2017,208:986-995. doi: 10.1016/j.apenergy.2017.09.051 URL
[16]	王成山, 宋关羽, 李鹏 , 等. 基于智能软开关的智能配电网柔性互联技术及展望[J]. 电力系统自动化, 2016,40(22):168-175.
	WANG Chengshan, SONG Guanyu, LI Peng , et al. Research and prospect for soft open point based flexible interconnection technology for smart distribution network[J]. Automation of Electric Power Systems, 2016,40(22):168-175.
[17]	熊正勇, 苗虹, 曾成碧 . 基于智能软开关与储能系统联合的有源配电网运行优化[J]. 电测与仪表, 2020,57(13):33-39.
	XIONG Zhengyong, MIAO Hong, ZENG Chengbi . Operation optimization of active distribution network based on smart soft open point and energy storage system[J]. Electrical Measurement & Instrumentation, 2020,57(13):33-39.
[18]	章博, 刘晟源, 林振智 , 等. 高比例新能源下考虑需求侧响应和智能软开关的配电网重构[J/OL]. 电力系统自动化.[ 2020- 08- 01]. http://kns.cnki.net/kcms/detail/32.1180.TP.20200515.1111.002.html.
	ZHANG Bo, LIU Shengyuan, LIN Zhenzhi, , et al. Reconfiguration of distribution network with hign proportion of renewable energy considering demand response and soft open point[J/OL]. Automation of Electric Power Systems, [ 2020- 08- 01]. http://kns.cnki.net/kcms/detail/32.1180.TP.20200515.1111.002.html.
[19]	BARAN M E, WU F F . Optimal capacitor placement on radial distribution systems[J]. IEEE Transactions on Power Delivery, 1989,4(1):725-734. doi: 10.1109/61.19265 URL
[20]	王成山, 孙充勃, 李鹏 , 等. 基于SNOP的配电网运行优化及分析[J]. 电力系统自动化, 2015,39(9):82-87.
	WANG Chengshan, SUN Chongbo, LI Peng , et al. SNOP-based operation optimization and analysis of distribution networks[J]. Automation of Electric Power Systems, 2015,39(9):82-87.