期刊文献+
共找到2,080篇文章
< 1 2 104 >
每页显示 20 50 100
Study on Relation between Industrial Structure and Grid Load in Shanxi Province
1
作者 Xiaofang Wang Guoli Ou 《Chinese Business Review》 2004年第11期1-6,共6页
The section of electric power is the foundation of national economy. The paper analyzes the relation between industrial structure and grid load in Shanxi province, and finds out that electricity demand and grid load r... The section of electric power is the foundation of national economy. The paper analyzes the relation between industrial structure and grid load in Shanxi province, and finds out that electricity demand and grid load relate linearly to value added of industry. In the end, the paper predicts electricity demand and grid load via the model. 展开更多
关键词 industrial structure electricity demand grid load
下载PDF
Analysis on Regional Power Grid Load Characteristics and Rational Allocation of Capacity Load Ratio
2
作者 Li Yaoxian Ma Chenwen 《International Journal of Technology Management》 2013年第1期49-52,共4页
The reasonability of the adopted capacity load ratio numerical value in urban power grid planning determines the economy of planning level yearly power grid.Too large capacity load ratio will result in the increasing ... The reasonability of the adopted capacity load ratio numerical value in urban power grid planning determines the economy of planning level yearly power grid.Too large capacity load ratio will result in the increasing investment in the early period of power grid construction, however, too small capacity load ratio will make the power grid have poor adaptability, affecting the power supply. Reasonably determining the adopted regional power grid capacity load ratio quantitative numerical value in planning has a strong guiding significance for constructing reliable and economic power grid and preventing power grid from excessive advance or lagging behind the load development. This paper, through the statistics and analysis of a certain regional power grid 2010-2012 three years' power grid daily load characteristics and the investment benefit evaluation of three years' 220KV power grid individual project, makes a preliminary analysis and puts forwards the specific advice on the reasonable values of power ~rid 35-220KV power transformation capacity load ratio. 展开更多
关键词 urban power grid planning power grid load capacity load ratio
下载PDF
Theory Study and Application of the BP-ANN Method for Power Grid Short-Term Load Forecasting 被引量:12
3
作者 Xia Hua Gang Zhang +1 位作者 Jiawei Yang Zhengyuan Li 《ZTE Communications》 2015年第3期2-5,共4页
Aiming at the low accuracy problem of power system short-term load forecasting by traditional methods, a back-propagation artificial neural network (BP-ANN) based method for short-term load forecasting is presented ... Aiming at the low accuracy problem of power system short-term load forecasting by traditional methods, a back-propagation artificial neural network (BP-ANN) based method for short-term load forecasting is presented in this paper. The forecast points are related to prophase adjacent data as well as the periodical long-term historical load data. Then the short-term load forecasting model of Shanxi Power Grid (China) based on BP-ANN method and correlation analysis is established. The simulation model matches well with practical power system load, indicating the BP-ANN method is simple and with higher precision and practicality. 展开更多
关键词 BP-ANN short-term load forecasting of power grid multiscale entropy correlation analysis
下载PDF
National Electricity Generation,Electricity Consumption and Peak Load by Grid (April 2006)
4
《Electricity》 2006年第2期49-49,共1页
Statistics on electricity generation and time of frequency over-limit;Statistics on electricity consumption and peak load.
关键词 National Electricity Generation Electricity Consumption and Peak load by grid April 2006 OVER
下载PDF
National Electricity Generation,Electricity Consumption and Peak Load by Grid (March 2006)
5
《Electricity》 2006年第2期49-49,共1页
Statistics on electricity generation and time of frequency over-limit;Statistics on electricity consumption and peak load.
关键词 National Electricity Generation Electricity Consumption and Peak load by grid March 2006 OVER
下载PDF
Fuzzy Logic–Based Scheme for Load Balancing in Grid Services
6
作者 Tarek Helmy Hamdi Al-Jamimi +1 位作者 Bashar Ahmed Hamzah Loqman 《Journal of Software Engineering and Applications》 2012年第12期149-156,共8页
Load balancing is essential for efficient utilization of resources and enhancing the responsiveness of a computational grid, especially that hosts of services most frequently used, i.e. food, health and nutrition. Var... Load balancing is essential for efficient utilization of resources and enhancing the responsiveness of a computational grid, especially that hosts of services most frequently used, i.e. food, health and nutrition. Various techniques have been developed and applied;each has its own limitations due to the dynamic nature of the grid. Efficient load balancing can be achieved by an effective measure of the node’s/cluster’s utilization. In this paper, as a part of an NSTIP project # 10-INF1381-04 and in order to assess of FAQIH framework ability to support the load balance in a computational grid that hosts of food, health and nutrition inquire services. We detail the design and implementation of a proposed fuzzy-logic-based scheme for dynamic load balancing in grid computing services. The proposed scheme works by using a fuzzy logic inference system which uses some metrics to capture the variability of loads and specifies the state of each node per a cluster. Then, based on the overall nodes’ states, the state of the corresponding cluster will be defined in order to assign the newly arrived inquires such that load balancing among different clusters and nodes is accomplished. Many experiments are conducted to investigate the effectiveness of the proposed fuzzy-logic-based scheme to support the load balance where the results show that the proposed scheme achieves really satisfactory and consistently load balance than of other randomize approaches in grid computing services. 展开更多
关键词 Fuzzy LOGIC load Balancing grid COMPUTING
下载PDF
TCP/IP Based Intelligent Load Management System in Micro-Grids Network Using MATLAB/Simulink 被引量:2
7
作者 Muhammad Ali Muhammad Zakariya +1 位作者 Muhammad Asif Amjad Ullah 《Energy and Power Engineering》 2012年第4期283-289,共7页
Computerized power management system with fast and optimal communication network overcomes all major dicrepencies of undue or inadequate load relief that were present in old conventional systems. This paper presents t... Computerized power management system with fast and optimal communication network overcomes all major dicrepencies of undue or inadequate load relief that were present in old conventional systems. This paper presents the basic perception and methodology of modern and true intelligent load management scheme in micro grids topology by employing TCP/IP protocol for fast and intelligent switching. The network understudy performs load management and power distribution intelligently in a unified network. Generated power is efficiently distributed among local loads through fast communication system of server in the form of source and clients in the form of loads through TCP/IP. The efficient use of information between server and clients enables to astutely control the load management in a power system of micro grids system. The processing time of above stated system comes out to be 10ms faster than others which ensure very less delay as compared to conventional methods. The Micro Grids system operating through TCP/IP control has been implemented in MATLAB/Simulink and results have been verified. 展开更多
关键词 Intelligent load Management (ILM) TCP/IP Micro grids (MGs) SERVER and Clients
下载PDF
Discussion on the Prospective Mode of China Power Grid Interconnection in View of Load Density
8
作者 Sun Shouguang(Electric Power Planning and Engineering Institute) 《Electricity》 1999年第2期30-34,共5页
关键词 grid Discussion on the Prospective Mode of China Power grid Interconnection in View of load Density VIEW
下载PDF
Grid Power Optimization Based on Adapting Load Forecasting and Weather Forecasting for System Which Involves Wind Power Systems
9
作者 Fadhil T. Aula Samuel C. Lee 《Smart Grid and Renewable Energy》 2012年第2期112-118,共7页
This paper describes the performance, generated power flow distribution and redistribution for each power plant on the grid based on adapting load and weather forecasting data. Both load forecasting and weather foreca... This paper describes the performance, generated power flow distribution and redistribution for each power plant on the grid based on adapting load and weather forecasting data. Both load forecasting and weather forecasting are used for collecting predicting data which are required for optimizing the performance of the grid. The stability of each power systems on the grid highly affected by load varying, and with the presence of the wind power systems on the grid, the grid will be more exposed to lowering its performance and increase the instability to other power systems on the gird. This is because of the intermittence behavior of the generated power from wind turbines as they depend on the wind speed which is varying all the time. However, with a good prediction of the wind speed, a close to the actual power of the wind can be determined. Furthermore, with knowing the load characteristics in advance, the new load curve can be determined after being subtracted from the wind power. Thus, with having the knowledge of the new load curve, and data that collected from SACADA system of the status of all power plants, the power optimization, load distribution and redistribution of the power flows between power plants can be successfully achieved. That is, the improvement of performance, more reliable, and more stable power grid. 展开更多
关键词 WIND POWER Systems grid POWER Plants WIND Forecasting load Forecasting POWER Optimization
下载PDF
城市中压配电网雪花格式网架结构初探
10
作者 王哲 段佳莉 +3 位作者 何平 王伟臣 徐晶 张章 《电力系统及其自动化学报》 CSCD 北大核心 2024年第9期51-60,共10页
为适应新型电力系统建设需求,提出一种适合国情的雪花格式网架结构。首先,总结国内外典型城市中压配电网结构的特征与优缺点;然后,结合天津已有网架结构,提出雪花格式网架结构及其构建方法;其次,分析测算雪花网结构的负荷转移能力、可... 为适应新型电力系统建设需求,提出一种适合国情的雪花格式网架结构。首先,总结国内外典型城市中压配电网结构的特征与优缺点;然后,结合天津已有网架结构,提出雪花格式网架结构及其构建方法;其次,分析测算雪花网结构的负荷转移能力、可靠性与效率效益水平;最后,从结构形式、适合场景等方面给出雪花网结构与花瓣结构等的综合对比情况。结果表明,雪花格式网架结构具有一定综合比较优势,可为中压配电网远景目标网架规划提供指导。 展开更多
关键词 城市电网 中压配电网 雪花格式网架结构 负荷转移能力
下载PDF
Intelligent Load Shedding Using TCP/IP for Smart Grids
11
作者 Muhammad Qamar Raza Muhammad Ali +3 位作者 Nauman Tareen Waheed ur Rehman Asadullah Khan Azam Ul Asar 《Energy and Power Engineering》 2012年第6期398-403,共6页
Computerized power management system with fast and optimal communication network overcomes all major discrepancies of undue or inadequate load relief that were present in old conventional systems. This paper presents ... Computerized power management system with fast and optimal communication network overcomes all major discrepancies of undue or inadequate load relief that were present in old conventional systems. This paper presents the basic perception and methodology of modern and true intelligent load shedding scheme in micro grids topology by employing TCP/IP protocol for fast and intelligent switching. The network understudy performs load management and power distribution intelligently in a unified network. Generated power is efficiently distributed among local loads through fast communication system of server in the form of source and clients in the form of loads through TCP/IP. The efficient use of information between server and clients enables to astutely control the load shedding in a power system of micro grids system. The processing time of above stated system comes out to be 10 ms faster than others which ensure very less delay as compared to conventional methods. The Micro Grids system operating through TCP/IP control has been implemented in MATLAB/SIMULINK and results have been verified. 展开更多
关键词 INTELLIGENT load SHEDDING (ILS) TCP/IP Micro grids (MGs) SERVER and Clients
下载PDF
源网荷储协同优化的主动配电网日前调度
12
作者 袁桂丽 丁宁 +1 位作者 杨彪 戴冠正 《科学技术与工程》 北大核心 2024年第24期10337-10347,共11页
在“双碳”目标下新能源发展迅速,但其出力的不确定性会影响电网安全稳定运行,主动配电网具备对各类分布式能源组合控制的能力,是解决目前存在的新能源并网问题的有效手段,同时需求响应作为控制负荷侧资源的有效手段,与主动配电网相结... 在“双碳”目标下新能源发展迅速,但其出力的不确定性会影响电网安全稳定运行,主动配电网具备对各类分布式能源组合控制的能力,是解决目前存在的新能源并网问题的有效手段,同时需求响应作为控制负荷侧资源的有效手段,与主动配电网相结合能够有效降低源荷双侧不确定性对电网的影响。构建“源网荷储”协同优化的主动配电网日前优化调度模型,以主动配电网收益最大为目标,综合考虑电动汽车参与需求响应、电网安全、储能电池配置以及各组成单元的成本及约束条件。仿真结果表明:所构建的主动配电网优化调度模型合理,能够降低有功网损,减小尖峰负荷,降低负荷峰谷差,提高配电网收益。 展开更多
关键词 主动配电网 电动汽车 源网荷储 需求响应 储能系统 有功无功协同优化
下载PDF
基于增量配电网园区的源网荷储一体化平台建设方案研究与应用
13
作者 钱君霞 郭家兴 +3 位作者 马鸿娟 闫安心 赵盛杰 秦川 《电工技术》 2024年第17期17-21,共5页
为满足增量配电网园区对供电能力、电能质量的较高要求,落实可再生能源消纳能力,提出了一种增量配电网园区源网荷储一体化平台建设方案,对一体化平台建设的思路及架构展开研究,并通过新疆甘泉堡源网荷储一体化控制系统建设实例说明设计... 为满足增量配电网园区对供电能力、电能质量的较高要求,落实可再生能源消纳能力,提出了一种增量配电网园区源网荷储一体化平台建设方案,对一体化平台建设的思路及架构展开研究,并通过新疆甘泉堡源网荷储一体化控制系统建设实例说明设计可行性。通过建设“源网荷储一体化、发配售电一条龙”的综合智慧平台,融合分布式光伏、风电、储能、换电/充换电站,实现增量配电网资源合理配置和绿色低碳能源高比例发展,充分发挥“源网荷储”灵活调节作用和实现能源互联网智能化应用,提高园区配电网供电的高稳定性和高可靠性,促进配电网建设,提高配电网运营效率,降低园区企业用电成本,从而推动产业转型、助力能源互联网建设和促进绿色低碳智慧能源快速发展。 展开更多
关键词 源网荷储 增量配电网 一体化 多能互补 产业转型
下载PDF
园区受端新型电力系统电力电量再平衡方法
14
作者 孔慧超 黄学劲 +3 位作者 王文钟 雷一 彭静 李海波 《综合智慧能源》 CAS 2024年第2期68-74,共7页
我国工业园区电能消耗占据了较高的比例,针对依托新型电力系统促进工业园区绿色低碳发展的需要,提出了一种面向工业园区受端新型电力系统的电力电量再平衡方法。首先,开展电力和电量需求预测并进行电力电量初平衡;然后,基于受端源网荷... 我国工业园区电能消耗占据了较高的比例,针对依托新型电力系统促进工业园区绿色低碳发展的需要,提出了一种面向工业园区受端新型电力系统的电力电量再平衡方法。首先,开展电力和电量需求预测并进行电力电量初平衡;然后,基于受端源网荷储协同作用并充分考虑园区节能、电能替代、各类分布式电源、储能和需求响应能力的作用进行电力电量再平衡,由此确定园区年度外调电和区内自产电的比例,进一步建立包含低碳效应和电力系统规模变化在内的量化指标评价体系,对电力电量再平衡带来的变配电容量缩减规模和降碳效用进行评价。以我国南方某工业园区新型电力系统的电力电量再平衡为例对以上方法进行了验证,结果表明:该园区2030年变配电规划容量可缩减10.1%,用电综合碳排放因子由0.60 kg/(kW·h)降至0.54 kg/(kW·h);2060年变配电规划容量可缩减9.57%,电能替代实现减碳5.85万t/a,可为受端新型电力系统的电力电量平衡提供有力的理论支撑。 展开更多
关键词 新型电力系统 源网荷储 电力电量平衡 负荷预测 电能替代 储能 低碳 工业园区
下载PDF
基于用户负荷数据的离网型光伏发电系统优化设计
15
作者 田拥军 刘阳京 《电工技术》 2024年第12期30-32,35,共4页
以云南某林区伐木厂的光伏发电系统为例,根据季节性变化的用电情况,详细统计用户的负荷数据,并利用PVsyst软件对光伏发电系统进行设计。论述了系统设计过程及其注意事项,剖析了设计仿真结果,系统基本能满足用户的用电需求,仅在夏季空调... 以云南某林区伐木厂的光伏发电系统为例,根据季节性变化的用电情况,详细统计用户的负荷数据,并利用PVsyst软件对光伏发电系统进行设计。论述了系统设计过程及其注意事项,剖析了设计仿真结果,系统基本能满足用户的用电需求,仅在夏季空调开启时有较低的亏电概率。 展开更多
关键词 光伏发电系统 离网型 负荷数据
下载PDF
基于计算智能的电力数据智能分析及应用研究
16
作者 白晶 周运斌 陈茜 《微型电脑应用》 2024年第7期245-248,共4页
为了提升智能电网负荷预测准确率,提出了一种基于深度学习的短期电力负荷预测模型。在长短时记忆网络和卷积神经网络基础上,构建混合CNN-LSTM预测模型结构。利用基于叠加卷积降噪自动编码器对电力数据进行特征提取,提出包含2个堆叠的LST... 为了提升智能电网负荷预测准确率,提出了一种基于深度学习的短期电力负荷预测模型。在长短时记忆网络和卷积神经网络基础上,构建混合CNN-LSTM预测模型结构。利用基于叠加卷积降噪自动编码器对电力数据进行特征提取,提出包含2个堆叠的LSTM层和1个线性输出层的负荷预测模型。24 h短期负荷预测结果表明,所提模型MAE、RMSE、MAPE和R2指标分别为232.08、292.19、0.0322、0.909,与XGBoost模型相比,性能分别提升74.8%、73.8%、70.8%和10.9%。 展开更多
关键词 智能电网 数据分析 负荷预测 特征提取
下载PDF
含电动汽车和光伏的配电网演化动态博弈调度策略 被引量:1
17
作者 闫丽梅 曾家威 +3 位作者 徐建军 彭程 赵书琪 贾莹 《太阳能学报》 EI CAS CSCD 北大核心 2024年第5期316-323,共8页
针对大规模电动汽车的无序充电行为可能导致电网出现的三相不平衡问题,基于演化动态博弈模型,提出一种考虑三相负荷平衡和光伏消纳的电动汽车充电调度策略。首先,基于电动汽车接入时段的主观性以及光伏出力和负荷的不确定性,引入游牧集... 针对大规模电动汽车的无序充电行为可能导致电网出现的三相不平衡问题,基于演化动态博弈模型,提出一种考虑三相负荷平衡和光伏消纳的电动汽车充电调度策略。首先,基于电动汽车接入时段的主观性以及光伏出力和负荷的不确定性,引入游牧集群和定居集群之间的演化动态博弈方程;然后,考虑用户侧和电网侧双方利益关系,设计以最小化电动汽车充电费用、三相负荷不平衡度和无功需求为目标的调度优化模型;最后,通过对某商业区配电网算例进行仿真求解,对比分析三相有功曲线、三相无功曲线以及荷电状态曲线的变化趋势。算例结果表明,该调度策略可有效降低三相不平衡度,满足无功补偿的需求以及改善用户充电成本。 展开更多
关键词 光伏发电 配电网 电动汽车 功率控制 负荷管理 无功补偿 演化动态博弈
下载PDF
基于分层事件触发的混合微电网集中控制策略 被引量:1
18
作者 李一鸣 何奇 +3 位作者 王海亮 钟浩 马辉 黄悦华 《中国电力》 CSCD 北大核心 2024年第3期73-82,共10页
针对混合微电网集中控制对中央控制器依赖严重、通信需求量大、扰动调节能力差的问题,提出一种微电网中央控制器(microgrid central control,MGCC)参与的分层事件触发控制策略,有效降低分布式集群的冗余通信并减少中央控制器计算负担,... 针对混合微电网集中控制对中央控制器依赖严重、通信需求量大、扰动调节能力差的问题,提出一种微电网中央控制器(microgrid central control,MGCC)参与的分层事件触发控制策略,有效降低分布式集群的冗余通信并减少中央控制器计算负担,改进策略可靠性。该策略将控制系统分为2层,其中,设备层为本地控制层,采用分布式协同控制,所设计的本地控制器可就地控制更新输出状态,实现混合微电网的分散自治运行;另外,在控制层建立微电网控制层,引入事件触发策略,协调MGCC获取混合微电网的全局信息,从而向本地控制器发出预定义的调控指令,实现“源网荷储”灵活调度,尤其是应对突发事件而引发的电网振荡。最后,采用Matlab搭建混合微电网模型并进行仿真,利用Stateflow模块实现了事件触发算法,验证控制策略在满足并网/孤岛模式可靠性、稳定性的前提下,系统通信量可降低56.4%。 展开更多
关键词 "源网荷储"微电网 事件触发策略 分层结构 微电网中央控制器
下载PDF
面向电网调峰的聚合温控负荷多目标优化控制方法
19
作者 余洋 向小平 +3 位作者 李梦璐 李君卫 王卜潇 蔡新雷 《电力自动化设备》 EI CSCD 北大核心 2024年第11期164-170,186,共8页
为使聚合温控负荷参与电网调峰时兼顾运行的经济性和清洁性,提出面向电网调峰的聚合温控负荷多目标优化控制方法。建立温控负荷聚合模型,在常规模型预测控制的基础上,计及温控负荷聚合特性,设计预测时间自适应优化策略,动态调整域参数... 为使聚合温控负荷参与电网调峰时兼顾运行的经济性和清洁性,提出面向电网调峰的聚合温控负荷多目标优化控制方法。建立温控负荷聚合模型,在常规模型预测控制的基础上,计及温控负荷聚合特性,设计预测时间自适应优化策略,动态调整域参数以协调处理优化精度与计算时间之间的矛盾,同时建立双闭环反馈机制以实时反馈温控负荷状态信息,提升实现调峰计划的可靠性;引入拉格朗日乘子和松弛因子,将多输出约束条件变成多目标函数的附加部分,提高控制方法的稳定性;提出改进的哈里斯鹰算法,对多目标优化问题进行求解,缩短模型预测控制的执行延时,提高寻优速度和寻优精度。所提控制方法与其他控制方法的仿真对比结果表明,所提控制方法有效降低了电网峰谷差以及运行成本和排放成本,同时兼顾了聚合温控负荷参与电网调峰的技术性、经济性和清洁性。 展开更多
关键词 温控负荷 电网调峰 模型预测控制 改进的哈里斯鹰算法 多目标优化
下载PDF
基于改进加权距离的建成区布线及供电范围调整
20
作者 刘洪 孙一涵 +3 位作者 韩嘉诚 蔡超 韩俊 李俊锴 《广东电力》 北大核心 2024年第10期3-12,共10页
针对建成区源荷空间发展与配电网供电范围调整及其建设改造之间的复杂耦合关系,提出一种基于改进加权距离的建成区布线及供电范围调整方法。首先,结合建成区与新建区自动布线的技术差异性,建立建成区配电网供电范围调整及其自动布线一... 针对建成区源荷空间发展与配电网供电范围调整及其建设改造之间的复杂耦合关系,提出一种基于改进加权距离的建成区布线及供电范围调整方法。首先,结合建成区与新建区自动布线的技术差异性,建立建成区配电网供电范围调整及其自动布线一体化优化框架;其次,提出考虑新增源荷归属动态调整的新建线路待选条数区间计算方法;然后,综合考虑负载率越限改进效果和源荷距离特征,提出基于改进加权距离的新建线路供电范围划分和基于混合整数线性优化的网架布局方法;最后,通过所提实例验证模型和方法的经济性与实用性。 展开更多
关键词 源荷时空特征 网架规划 布线与改造 中压配电网 地理信息
下载PDF
上一页 1 2 104 下一页 到第
使用帮助 返回顶部