摘要
现有电-气互联综合能源系统(IEGES)的传输网络规划仍侧重于考虑输电系统可靠性,对“电-气”双向联供的可靠性考虑不足;并且传统电、气子系统网络独立规划的模式将难以满足日益增长的综合负荷需求。针对上述问题,重点研究衡量IEGES供能可靠性,完善了“以电为主”的IEGES传输网络规划模型;将可靠性引入传输网络优化规划的目标函数和约束条件中,直接获得满足可靠性要求的规划方案,避免方案的反复校核与调整。建立了考虑可靠性的弃风成本、能量短缺成本、电-气耦合转换、供电供气平衡等因素的传输网络优化规划数学模型。为提高模型求解效率,采用增量分段线性化的方法对非线性约束进行线性化处理,将原混合整数非线性规划问题转化为混合整数线性规划问题进行求解。基于IEEE 39节点与比利时NGS 20节点联合系统的仿真结果表明:考虑供能可靠性的传输网络规划方案在提升系统经济性、可靠性和风电消纳能力等方面效果显著,可为IEGES优化规划提供技术手段。
The current transmission network planning of IEGES(Integrated Electricity-gas Energy System)still focuses on the reliability of transmission system.However,the reliability of“electricity-gas”bidirectional joint supply is not sufficiently considered.Moreover,the independent planning model of traditional electricity and natural gas subsystem cannot satisfy the increasing comprehensive load demands.To address these issues,the present work measures the energy supply reliability of IEGES,and improves the“electricity-based”IEGES transmission network planning model.The reliability is introduced into the objective function and constraints.The obtained planning schemes can hence satisfy the reliability requirements,in which the repeated check and adjustment of the planning schemes are avoided.An optimal planning model of electricity-gas energy transmission network is established,which considers the wind curtailment cost,energy shortage cost,electricity-gas coupling conversion,and power supply and gas supply balance.To improve the computational efficiency,the incremental piecewise linearization approach is adopted,and the original mixed-integer nonlinear programming problem is transformed into a mixed-integer linear programming problem.Simulative results on IEEE 39-bus and Belgium 20-node gas joint system indicate that the proposed planning model effectively improves the system performance in aspects of the economics,reliability and accommodation of wind power generation,which can provide technical guidance for IEGES planning.
作者
黎静华
王治邦
姜娟
LI Jinghua;WANG Zhibang;JIANG Juan(Guangxi Key Laboratory of Power System Optimization and Energy-saving Technology,Guangxi University,Nanning 530004,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2021年第9期164-172,247,共10页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51977042)
广西研究生教育创新计划资助项目(YCBZ2020002)。
关键词
电-气互联综合能源系统
耦合元件规划
传输网络优化规划
可靠性
增量分段线性化
integrated electricity-gas energy system
planning of coupling units
optimal planning of transmission network
reliability
incremental piecewise linearization
