Security Assessment and Preventive Control Method ofCombined Electricity and Heat Systems with DistributedSolid Electric Thermal Storage

doi:10.12204/j.issn.1000-7229.2022.03.011

Abstract

Abstract:

Since the distributed solid electric thermal storage (DSETS) is affected by various environmental temperature factors, the schedule of energy transfer may be uncontrolled, which causes the security risks in the operation of multi-energy systems with DSETS. Thus, to tackle this problem, a security assessment and preventive control method of combined electricity and heat systems with DSETS is proposed. Firstly, a two-stage optimization model is established. The objective of the first stage is to minimize the system operation cost. A contingency set is established for the combined electricity and heat systems with DSETS. The contingency set is used to simulate the disturbance of the DSETS’ load increase and the branch N-1, and the proposed evaluation index of branch overload is applied to evaluate the security of the system after a contingency. The preventive control is adopted in the second stage when the branch is overloaded in the first stage of optimization. The objective of the second stage is to minimize the active power adjustment of each unit of the system, and the overload branch is corrected. The active power flow of the branch is reduced below the safety margin by regulating the output of each unit of the system. Finally, by comparing the safety of systems with or without the preventive control, the validity of the preventive control model and evaluation index is verified. The overload indices of the above two contingencies are 2.82% and 6.96%, respectively, and the overload of a branch is corrected by adopting the preventive control.

Key words: distributed solid electric thermal storage (DSETS), branch overload, N-1, evaluation index, preventive control

CLC Number:

TM734

JI Huichao, WANG Haixin, YANG Junyou, LIU Muyi, ZHANG Shiyu. Security Assessment and Preventive Control Method ofCombined Electricity and Heat Systems with DistributedSolid Electric Thermal Storage[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(3): 100-111.

Figures/Tables 16

Fig.1 Structure of combined electricity and heat system with DSETS

Fig.2 The security assessment and preventive controlframework of combined electricity and heatsystem with DSETS

Fig.3 Process of the security assessment and preventivecontrol method of combined electricity and heat system

Fig.4 Simulation structure of combinedelectricity and heat system

Fig.5 Curves of electric heat load and wind power prediction

Table 1 Simulation parameters of TPPs

Table 2 Simulation parameters of CHPs

Table 3 The simulation parameters of Has

Table 4 The simulation parameters of EES

Table 5 Simulation parameters of DSETS

Fig.6 Power prediction of four DSETSs customers

Table 6 Comparison of preventive control results ofbranch overload under the operation condition 1

Table 7 Power regulation of preventive controlunder the operation condition 1

Fig.7 Comparison of scheduled results ofpreventive control heat power

Table 8 Comparison of preventive control results ofbranch overload under the operation condition 2

Table 9 Power regulation of preventive controlunder the operation condition 2

References 29

[1]	魏震波, 马新如, 郭毅, 等. 碳交易机制下考虑需求响应的综合能源系统优化运行[J]. 电力建设, 2022, 43(1):1-9.
	WEI Zhenbo, MA Xinru, GUO Yi, et al. Optimized operation of integrated energy system considering demand response under carbon trading mechanism[J]. Electric Power Construction, 2022, 43(1):1-9.
[2]	艾芊, 郝然. 多能互补、集成优化能源系统关键技术及挑战[J]. 电力系统自动化, 2018, 42(4):2-10, 46.
	AI Qian, HAO Ran. Key technologies and challenges for multi-energy complementarity and optimization of integrated energy system[J]. Automation of Electric Power Systems, 2018, 42(4):2-10, 46.
[3]	潘昭光, 孙宏斌, 郭庆来. 面向能源互联网的多能流静态安全分析方法[J]. 电网技术, 2016, 40(6):1627-1634.
	PAN Zhaoguang, SUN Hongbin, GUO Qinglai. Energy Internet oriented static security analysis method for multi-energy flow[J]. Power System Technology, 2016, 40(6):1627-1634.
[4]	王丹, 李思源, 贾宏杰, 等含可再生能源的区域综合能源系统区间化安全域研究(一): 概念建模与降维观测[J/OL]. 中国电机工程学报, 2021 (2021-07-01)[2021-10-12]. https://doi.org/10.13334/j.0258-8013.pcsee.202408.
	WANG Dan, LI Siyuan, JIA Hongjie, et al. Research on interval security region of regional integrated energy system integrated with renewable energy sources, part Ⅰ:Concepts modelling and dimension reduction observation[J/OL]. Proceedings of the CSEE, 2021 (2021-07-01)[2021-10-12]. https://doi.org/10.13334/j.0258-8013.pcsee.202408.
[5]	马瑞, 王大朔. 考虑天然气N-1的多能流系统静态安全耦合分析[J]. 中国电机工程学报, 2019, 39(6):1627-1636, 1859.
	MA Rui, WANG Dashuo. Static security coupling analysis of multi-energy flow system considering natural gas system N-1 contingency[J]. Proceedings of the CSEE, 2019, 39(6):1627-1636, 1859.
[6]	陈厚合, 邵俊岩, 姜涛, 等. 基于多能流解耦算法的综合能源系统N-1静态安全分析[J]. 电力系统自动化, 2019, 43(17):20-27, 131.
	CHEN Houhe, SHAO Junyan, JIANG Tao, et al. Static N-1 security analysis for integrated energy system based on decoupled multi-energy flow calculation method[J]. Automation of Electric Power Systems, 2019, 43(17):20-27, 131.
[7]	林紫菡, 刘祚宇, 文福拴, 等. 计及N-1安全准则的能量枢纽优化配置[J]. 电力自动化设备, 2019, 39(8):137-143, 231.
	LIN Zihan, LIU Zuoyu, WEN Fushuan, et al. Optimal placement of energy hubs considering N-1 security criterion[J]. Electric Power Automation Equipment, 2019, 39(8):137-143, 231.
[8]	果营, 王丹, 李思源, 等. 基于安全域的区域综合能源系统储能优化配置[J/OL]. 电网技术, 2021 (2021-06-15) [2021-10-12]. https://doi.org/10.13335/j.1000-3673.pst.2021.0474.
	GUO Ying, WANG Dan, LI Siyuan, et al. Optimal allocation of energy storage in regional integrated energy system based on security region[J/OL]. Power System Technology, 2021 (2021-06-15) [2021-10-12]. https://doi.org/10.13335/j.1000-3673.pst.2021.0474.
[9]	邢作霞, 樊金鹏, 陈雷, 等. 固态电制热储热传热匹配特性及热控制方法[J]. 电工技术学报, 2020, 35(11):2439-2447.
	XING Zuoxia, FAN Jinpeng, CHEN Lei, et al. Heat transfer matching characteristic and heat control method of solid-state electric heating thermal storage system[J]. Transactions of China Electrotechnical Society, 2020, 35(11):2439-2447.
[10]	罗艳红, 梁佳丽, 杨东升, 等. 计及可靠性的电—气—热能量枢纽配置与运行优化[J]. 电力系统自动化, 2018, 42(4):47-54.
	LUO Yanhong, LIANG Jiali, YANG Dongsheng, et al. Configuration and operation optimization of electricity-gas-heat energy hub considering reliability[J]. Automation of Electric Power Systems, 2018, 42(4):47-54.
[11]	王英瑞, 曾博, 郭经, 等. 电-热-气综合能源系统多能流计算方法[J]. 电网技术, 2016, 40(10):2942-2951.
	WANG Yingrui, ZENG Bo, GUO Jing, et al. Multi-energy flow calculation method for integrated energy system containing electricity, heat and gas[J]. Power System Technology, 2016, 40(10):2942-2951.
[12]	江叶峰, 熊浩, 胡宇, 等. 考虑电热综合需求响应的虚拟电厂优化调度[J]. 电力建设, 2019, 40(12):61-69.
	JIANG Yefeng, XIONG Hao, HU Yu, et al. Optimal dispatching of virtual power plants considering comprehensive demand response of electricity and heat loads[J]. Electric Power Construction, 2019, 40(12):61-69.
[13]	JI H C, WANG H X, YANG J Y, et al. Optimal schedule of solid electric thermal storage considering consumer behavior characteristics in combined electricity and heat networks[J]. Energy, 2021, 234:121237. doi: 10.1016/j.energy.2021.121237 URL
[14]	马丽叶, 贾彬, 卢志刚, 等. 基于静态安全性和实时供电能力的输电网安全等级研究[J]. 电工技术学报, 2014, 29(6):229-237.
	MA Liye, JIA Bin, LU Zhigang, et al. Research on security classification of transmission network considering static security and real-time power supply capability[J]. Transactions of China Electrotechnical Society, 2014, 29(6):229-237.
[15]	LU Z G, HE L C, ZHANG D, et al. A security level classification method for power systems under N-1 contingency[J]. Energies, 2017, 10(12):2055. doi: 10.3390/en10122055 URL
[16]	徐帆, 耿建, 姚建国, 等. 安全约束经济调度建模及应用[J]. 电网技术, 2010, 34(11):55-58.
	XU Fan, GENG Jian, YAO Jianguo, et al. Modeling and application of security constrained economic dispatch[J]. Power System Technology, 2010, 34(11):55-58.
[17]	黄国栋, 许丹, 崔晖, 等. 互联电网安全约束经济调度场景构建方法[J]. 电力系统保护与控制, 2021, 49(8):136-143.
	HUANG Guodong, XU Dan, CUI Hui, et al. Scenario construction method of security-constrained economic dispatch for an interconnected power grid[J]. Power System Protection and Control, 2021, 49(8):136-143.
[18]	田建芳, 毛亚珊, 翟桥柱, 等. 基于风电消纳能力评估的安全约束经济调度方法[J]. 电网技术, 2015, 39(9):2398-2403.
	TIAN Jianfang, MAO Yashan, ZHAI Qiaozhu, et al. Security constrained unit commitment with wind power based on evaluation of wind power penetration capacity[J]. Power System Technology, 2015, 39(9):2398-2403.
[19]	LI G Q, ZHANG R F, JIANG T, et al. Security-constrained bi-level economic dispatch model for integrated natural gas and electricity systems considering wind power and power-to-gas process[J]. Applied Energy, 2017, 194:696-704. doi: 10.1016/j.apenergy.2016.07.077 URL
[20]	吕泉, 陈天佑, 王海霞, 等. 配置储热后热电机组调峰能力分析[J]. 电力系统自动化, 2014, 38(11):34-41.
	LYU Quan, CHEN Tianyou, WANG Haixia, et al. Analysis on peak-load regulation ability of cogeneration unit with heat accumulator[J]. Automation of Electric Power Systems, 2014, 38(11):34-41.
[21]	崔杨, 陈志, 严干贵, 等. 基于含储热热电联产机组与电锅炉的弃风消纳协调调度模型[J]. 中国电机工程学报, 2016, 36(15):4072-4081.
	CUI Yang, CHEN Zhi, YAN Gangui, et al. Coordinated wind power accommodating dispatch model based on electric boiler and CHP with thermal energy storage[J]. Proceedings of the CSEE, 2016, 36(15):4072-4081.
[22]	LI Z G, WU W C, WANG J H, et al. Transmission-constrained unit commitment considering combined electricity and district heating networks[J]. IEEE Transactions on Sustainable Energy, 2016, 7(2):480-492. doi: 10.1109/TSTE.2015.2500571 URL
[23]	DAI Y H, CHEN L, MIN Y, et al. Dispatch model for CHP with pipeline and building thermal energy storage considering heat transfer process[J]. IEEE Transactions on Sustainable Energy, 2019, 10(1):192-203. doi: 10.1109/TSTE.2018.2829536 URL
[24]	LI Z G, WU W C, SHAHIDEHPOUR M, et al. Combined heat and power dispatch considering pipeline energy storage of district heating network[J]. IEEE Transactions on Sustainable Energy, 2016, 7(1):12-22. doi: 10.1109/TSTE.2015.2467383 URL
[25]	WANG H X, YANG J Y, CHEN Z, et al. Optimal dispatch based on prediction of distributed electric heating storages in combined electricity and heat networks[J]. Applied Energy, 2020, 267:114879. doi: 10.1016/j.apenergy.2020.114879 URL
[26]	LI W D, LI T, WANG H X, et al. Optimal dispatch model considering environmental cost based on combined heat and power with thermal energy storage and demand response[J]. Energies, 2019, 12(5):817. doi: 10.3390/en12050817 URL
[27]	赵博石, 胡泽春, 宋永华. 考虑N-1安全约束的含可再生能源输电网结构鲁棒优化[J]. 电力系统自动化, 2019, 43(4):16-24.
	ZHAO Boshi, HU Zechun, SONG Yonghua. Robust optimization of transmission topology with renewable energy sources considering N-1 security constraint[J]. Automation of Electric Power Systems, 2019, 43(4):16-24.
[28]	钟浩, 郝亚群, 刘海涛, 等. 考虑风电消纳的风-蓄联合系统N-1安全校正方法[J]. 电网与清洁能源, 2019, 35(2):78-86.
	ZHONG Hao, HAO Yaqun, LIU Haitao, et al. N-1 security rescheduling method for wind-storage combined system considering wind power consumption[J]. Power System and Clean Energy, 2019, 35(2):78-86.
[29]	朱炳铨, 钱韦廷, 张俊, 等. 考虑风电消纳的电热混合储能系统优化定容方法[J]. 电力建设, 2020, 41(12):14-22.
	ZHU Bingquan, QIAN Weiting, ZHANG Jun, et al. An optimal sizing method for hybrid electrical and thermal energy storage system considering wind power accommodation[J]. Electric Power Construction, 2020, 41(12):14-22.