摘要
未来含可再生能源的区域综合能源系统可以实现能源低碳高效、可持续利用,但随着可再生能源渗透率不断提高,系统也面临更严峻的安全性挑战。现有区域综合能源系统安全域模型对于可再生能源随机性影响考虑有待深入。该文将可再生能源随机性所引起的系统供需不平衡视为一种特殊“N–1故障”,基于区间数学分析理论,提出一种含可再生能源的区域综合能源系统区间化安全域概念与模型,域内存在一个不受可再生能源随机性影响区域,并分析了其正确性;进而结合工程实际构建实用区间化安全域模型;然后,从实用化不受可再生能源随机性影响区域最大化的角度出发,构建一种观测变量优化选取的降维投影观测方法;最后,通过算例验证所提模型的有效性,且两种安全域模型可相互近似替代。同时,通过研究区间化最大供能能力工作点对应各管线段所供应负荷特征,以及与观测变量相关的实用区间化安全边界,探讨了实用化不受可再生能源随机性影响区域的3类增大方法。所提模型可为集成可再生能源的区域综合能源系统提供一种新的安全分析方法,并为后续安全控制研究奠定一定的理论基础。
Regional integrated energy system integrated with renewable energy sources will realize low-carbon,efficient and sustainable utilization of energy,but it also faces more serious security challenges with the increasing penetration of renewable energy.The impact of renewable energy uncertainty on the existing regional integrated energy system security region model needs further investigating.This work therefore proposed the concept and model of an interval security region of regional integrated energy system integrated with renewable energy sources based on interval mathematics analysis,and the imbalance between supply and demand caused by uncertainty of renewable energy sources was regarded as a special N-1 contingency.A security region unaffected by renewable energy uncertainty existed in the interval security region,and the correctness of it was analyzed.Then considering engineering practice,a practical interval security region model was established.From the perspective of maximizing practical security region unaffected by renewable energy uncertainty,a dimension reduction and projection observation method considering optimal selection of observation variables was proposed.Finally,numerical cases were simulated to demonstrate the effectiveness of the proposed model,and the two security region models could replace each other approximately.Meanwhile,three methods to increase practical security region unaffected by renewable energy uncertainty were discussed by analyzing the characteristic of load supplied by pipeline segment of interval total supply capability operating point and the practical interval security boundary expressions related to observation variables.The proposed model can provide a new security analysis method for the regional integrated energy system integrated with renewable energy sources,and lay a theoretical foundation for the follow-up security control researches.
作者
王丹
李思源
贾宏杰
肖峻
果营
WANG Dan;LI Siyuan;JIA Hongjie;XIAO Jun;GUO Ying(Key Laboratory of Smart Grid of Ministry of Education(Tianjin University),Nankai District,Tianjin 300072,China;Key Laboratory of Smart Energy&Information Technology of Tianjin Municipality(Tianjin University),Nankai District,Tianjin 300072,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第9期3188-3203,共16页
Proceedings of the CSEE
基金
国家重点研发计划项目(2018YFB0905000)
国家电网公司总部科技项目(SGTJDK00DWJS1800232)
国家自然科学基金项目(51977141)。
关键词
区间数学
区域综合能源系统
可再生能源
安全域
实用区间化安全边界
interval mathematics
regional integrated energy system
renewable energy sources
security region
practical interval security boundary
