A load dispatch method using fractional programming and semidefinite programming     

Yasuhiro Kobayashi  Toshiyuki Sawa  Toshiyuki Furukawa  Shigeru Kawamoto 《Electrical Engineering in Japan》2002,138(2):49-58

This paper describes a load dispatch method which minimizes power cost—[fuel cost]/[electric output]—for a power system with thermal plants and energy storage facilities. The proposed method employs fractional programming to convert a minimization problem with fractional objective function to a series of quadratic minimization problems, and semidefinite programming to solve converted problems. The method provides the optimum time‐dependent power output/input and storage level of energy storage facilities as well as time‐dependent power output of thermal plants. The method has been applied to a power system with five thermal plants, two energy storage facilities of various performances, and five load demands. The optimum load scheme of four time mesh points is obtained for the thermal plants and energy storage facilities. The fractional programming successfully converges the optimal scheme through a few iterations. The semidefinite programming deals with a variable matrix of 164 dimensions, and 185 inequality constraints. © 2001 Scripta Technica, Electr Eng Jpn, 138(2): 49–58, 2002  相似文献   

Multiobjective dynamic load-dispatching method for optimal operation of power systems     

Motonobu Yoshikawa  Hiroshi Nakajima  Takeshi Inada  Yasushi Harada  Masahiko Amano  Yuji Nakata 《Electrical Engineering in Japan》1995,115(7):29-39

A new practical method is proposed which gives a quasi-optimal solution of the dynamic load-dispatching problem formulated by a multiconstraint multiobjective optimization problem. Here, the multiple constraints are rate reserve constraints and power flow ones, and the multiple objectives are fuel cost and CO₂ emission. The proposed method is an integration of the following three techniques: (1) “Group Dispatch Scheme,” which is developed by the authors, is used to satisfy a violated constraint easily. This scheme consists of three steps. The first step is to classify all generators into two groups. One is the group which should be more loaded to satisfy the violated constraint, and the other is the should-be less loaded group. The second step is to add some load to the former group, and to subtract the same load from the latter. The third step is to dispatch each group load to each groups generators, respectively; (2) the dynamic load-dispatching algorithm is used which provides, in practical time, quasi-optimal generation trajectories; (3) the conventional weighting parametric method is used to obtain a Pareto optimal solution of multiobjective problems. The effectiveness of the method is clarified by a computer simulation on the actual power system of Kansai Electric Power Company.  相似文献   

现代产品设计中的区域文化意象研究     

朱上上 《包装工程》2009,30(5)

区域文化意象的研究,有助于体现产品区域特色和文化内涵.研究了区域文化意象的消费者认知匹配模型,阐述了区域文化意象的消费者认知匹配模型的3个层次.并以良渚文化意象的酒器设计为例进行验证.  相似文献   

单一时段和多时段下区域旋转备用的获取   总被引：3，自引：0，他引：3  

陈杨  刘俊勇 《电力系统及其自动化学报》2008,20(1):38-45

在满足区域购买备用成本最小的目标下,基于"协调运作"的备用交易模式提出了单一时段内获取区域旋转备用容量的两种方法:①报价排队法,按照区域统一边际备用价格结算.②非线性规划法,按照机组实际报价结算,然后扩展至多时段内区域备用获取的计算,通过全局优化得到了优化后的区域备用容量,体现了区域间的备用支持,降低了获取的备用容量,优化了各地的电力资源.仿真算例分别说明了单一时段和多时段下区域备用获取的方法和计算结果.  相似文献   

基于云原生和中台技术的电网调度云智能平台的研究     

黄振 《电力信息与通信技术》2021,(3):98-106

随着电力市场化改革的全面推进、新能源持续的高比例发展以及电动车的爆发式增长,借鉴互联网技术支撑大规模复杂系统的平台化支撑经验,文章提出了以平台化的方式支撑电力调度领域适用数字化新基建的3个转型方向,并介绍相关方案应用于实践的探索.首先梳理当前中国电力调度数字化转型的可行性分析,包括内涵、现状、可行性分析及3个挑战.然后...  相似文献   

基于模糊层次分析法的自动化机房供电风险评估     

左黎  卜峰 《电气自动化》2014,(6):80-82

针对电网调度自动化主站供电系统运行状态和潜在发生的风险,构建自动化机房供电评估指标体系,提出了一种基于模糊层次分析法的自动化机房供电风险评估方法,通过权重选择和分级评估,同时考虑各类影响因素间的相互作用,实现了对自动化机房供电的科学评估与判断,结合实例分析证明具有较强的科学性和实用性。  相似文献   

湖北电力调度软交换容灾备用系统建设研究     

毛卉  赵婷  沈晗阳 《电力信息化》2014,(4):71-75

针对“省为地备、地为县备”的容灾建设机制,文章在分析湖北电力通信调度系统现状的基础上。对通信网络容灾中采用软交换方式建设全省的调度电话备用系统展开讨论。通过建立调度软交换备用系统这种方式来满足容灾机制要求,提高调度交换系统网络安全性,扩展调度通信系统业务新模式。  相似文献   

区域电网调度系统中维护信息对称性特征识别     

陈飞 《信息技术》2021,(2):125-130

为提升对区域电网调度系统维护信息对称性特征的识别效率及准确率,文中首先通过小波变换方法提取区域电网调度系统中维护信息的特征,然后运用模糊C均值算法分析特征数据的分布情况,并以此为基础,获取维护信息对称性故障特征的波形,根据Ucosθ波形特征识别结果,实现对区域电网调度系统中维护信息对称性特征的识别.实验结果表明:在不同...  相似文献   

分散控制系统I/O通道分配存在的问题及处理     

朱青生 《湖北电力》2006,30(1):40-40,42

通过2个实例分析了DCS系统I/O通道分配上考虑不周导致的一些问题,并提出了相应的解决方案。  相似文献   

电力调度通信录音系统技术浅析     

梁宇玲  张聚明 《电力系统通信》2009,30(6):65-67

针对电力调度网中数字录音系统现状,分析了录音系统的几种方案,介绍了当前电力系统采用的录音系统的实现方案和主要技术,通过对主要技术特点的对比,介绍了各种技术适用的场合,并对以后基于VoIP和软交换的录音系统的实现提出了方案。  相似文献