期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
A Steady-State Contingency Analysis of the SADC Regional Grid Using the N-1 Criterion
1
作者 Stacey Juliana Tombozi Mwale Innocent Ewean Davidson 《Journal of Energy and Power Engineering》 2015年第5期479-485,共7页
Southern Africa has experienced electric power deficits over the last decade. This has been due in part to the member countries' inadequate electrical power supply system, as well as load growth in areas which were n... Southern Africa has experienced electric power deficits over the last decade. This has been due in part to the member countries' inadequate electrical power supply system, as well as load growth in areas which were not adequately planned for. This has induced the formation of organizations such as SADC (Southern African Development Community) and SAPP (Southern African Power Pool) that have the common goal of achieving development and economic growth in the region which comprises of 15 member countries. This paper presents results from a security analysis of the region's electric power supply system using a baseline level of performance. This was carried out by performing a steady-state contingency analysis on a SADC power network model subject to the N-1 criteria which expresses the ability of the power network to experience a contingency without causing an overload or failure in any other part of the network. Simulations were carried out using DigSilent. 展开更多
关键词 n-1 criteria power deficits security analysis contingency analysis.
下载PDF
计及N-1线路故障的连续时间随机安全约束机组组合问题的双层分解算法
2
作者 田野 李正烁 高晗 《电网技术》 EI CSCD 北大核心 2023年第8期3269-3279,共11页
伴随着可再生能源装机规模逐步扩大,电力系统的随机性和波动性进一步增强。为了制定更准确的机组启停和发电计划,保证系统运行安全,建立计及N-1线路故障的连续时间随机安全约束机组组合模型。首先采用Bernstein多项式将该无限维的连续... 伴随着可再生能源装机规模逐步扩大,电力系统的随机性和波动性进一步增强。为了制定更准确的机组启停和发电计划,保证系统运行安全,建立计及N-1线路故障的连续时间随机安全约束机组组合模型。首先采用Bernstein多项式将该无限维的连续时间优化模型转化为有限维的混合整数线性规划(mixed integer linear programming,MILP)模型。由于转化后的模型维度极高,为高效求解该模型,提出逐步对冲-Benders分解(progressive hedging-Bendersdecom-position, PH-BD)双层分解算法:外层采用逐步对冲(progressive hedging,PH)算法对场景打捆后的“场景束”进行分解,实现每个场景束对应问题的并行计算;内层采用Benders分解(Benders decomposition,BD)算法将每个场景束对应问题分解为无线路约束主问题和可并行求解的线路约束子问题。最后在IEEE118节点系统中进行算例验证。结果表明,与离散时间模型相比,连续时间随机安全约束机组组合模型可以更准确地制定机组启停和发电计划以及设置备用容量;与传统PH算法相比,所提出的PH-BD算法显著降低了求解时间。 展开更多
关键词 n-1线路故障 连续时间机组组合 BERNSTEIN多项式 分解算法
原文传递
电力系统输电运行弹性空间建模与效益评估 被引量:12
3
作者 刘林虎 金黎明 +3 位作者 夏清 余娟 杨知方 代伟 《电力系统自动化》 EI CSCD 北大核心 2019年第5期7-16,共10页
电力负荷增长和新能源接入给电网安全、经济运行带来了新的挑战。为提高电网运行安全裕度,在更大空间内实现资源优化配置,需要在现有设备基础上,挖掘电网的电能输送潜力。为此,提出输电环节运行弹性空间的概念,以挖掘输电线路与联络线... 电力负荷增长和新能源接入给电网安全、经济运行带来了新的挑战。为提高电网运行安全裕度,在更大空间内实现资源优化配置,需要在现有设备基础上,挖掘电网的电能输送潜力。为此,提出输电环节运行弹性空间的概念,以挖掘输电线路与联络线的运行弹性空间。文中提出两种提高输电运行弹性空间的方式及其建模方法:①基于转移分布因子,建立线路故障短时增容弹性模型;②基于互联外网静态等值模型,建立考虑外网运行约束的联络线调整弹性模型。在此基础上,提出考虑输电运行弹性空间的N-1安全经济调度优化模型。最后,通过IEEE 30节点与IEEE 9节点互联系统评估了输电运行弹性空间的效益。仿真表明,考虑输电运行弹性空间的调度方法相较于常规调度方法可有效提高风电消纳,降低电网运行成本。 展开更多
关键词 输电运行弹性空间 故障短时增容 联络线灵活性 n-1安全经济调度
下载PDF
Allocation of a Variable Series Reactor Considering AC Constraints and Contingencies 被引量:1
4
作者 Xiaohu Zhang Chunlei Xu +5 位作者 Di Shi Zhiwei Wang Qibing Zhang Guodong Liu Kevin Tomsovic Aleksandar Dimitrovski 《CSEE Journal of Power and Energy Systems》 SCIE CSCD 2019年第1期63-72,共10页
The Variable Series Reactors(VSRs)can efficiently control the power flow through the adjustment of the line reactance.When they are appropriately allocated in the power network,the transmission congestion and generati... The Variable Series Reactors(VSRs)can efficiently control the power flow through the adjustment of the line reactance.When they are appropriately allocated in the power network,the transmission congestion and generation cost can be reduced.This paper proposes a planning model to optimally allocate VSRs considering AC constraints and multi-scenarios including base case and contingencies.The planning model is originally a non-convex large scale mixed integer nonlinear program(MINLP),which is generally intractable.The proposed Benders approach decomposes the MINLP model into a mixed integer linear program(MILP)master problem and a number of nonlinear subproblems.Numerical case studies based on IEEE 118-bus demonstrate the high performance of the proposed approach. 展开更多
关键词 n-1 contingencies optimization optimal power flow variable series reactor transmission network
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部